WO2012167660A1 - Method and apparatus for obtaining cim resources - Google Patents

Abstract

A method for obtaining Common Information Model (CIM) resources is provided by the present invention. The method generates a Distributed Hash Table network (DHT) network of a Common Information Model Object Manager (CIMOM) by performing Hash calculation to information of intra-network CIMOM by any node in a distributed network, and also provides a procedure for obtaining the CIM resources of the intra-network CIMOM by DHT algorithm. The corresponding apparatus for obtaining the CIM resources is also provided by the present invention. By performing the method and apparatus of the present invention, the CIM resources information of the intra-network CIMOM can be obtained at any node by a CIM client, and the obtaining of the CIM resources under the extensive and distributed multi-host environment is realized.

Description

 Method and device for acquiring CIM resources

 This application claims priority to Chinese Patent Application No. 201110205057.1, entitled "A Method and Apparatus for Obtaining CIM Resources" on July 21, 2011, the entire contents of which are incorporated by reference. In this application.

Technical field

 The present invention relates to communication networks, and in particular, to a method and apparatus for acquiring CIM resources. Background technique

 The Di s tr ibuted Management Task Force (DMTF) defines a set of specifications and frameworks to standardize the interface between management applications and various managed elements (MEs), existing general information. The Common Inf or Moderation Mode (CIM) system includes a CIM client, a CIM Object Manager (CIM0M), a CIM Provider plugin (CIM Provider), and a managed network element, where the CIM client is CIM0M. The access side. The CIM client obtains model and instance data, subscriptions, and receive events for each ME from the CIM0M through a standard interface. CIM0M is the core of the entire CIM system architecture. It is used to manage model and instance data related to each ME, receive subscriptions and forward events, etc., and each managed network element model and instance data managed by CIM0M are stored in the repository Repos i tory. . The CIM provider plug-in is an adaptation module between the CIM0M and the ME. It is integrated into the CIM0M by means of a plug-in. The ME is used to obtain the instance data and events of the ME and report it to CIM0M. The information model of the managed network element is described by the M0F ( Managed Object Forma t ) format defined in the CIM Infras tructure specification (DMIF Specification Document DSP0004, CIM Infras truncation Spec I ica t ion ).

The interface specification between CIM client and CIM0M includes CIM-XML (Co匪on Inf ormatometric Model - Extensible Markup Language, described in DMTF specification document DSP0200), WS-Management (Web Services for Management, in DMTF specification). Document DSP0226), SM CLP (Server Management Command Line l) Protocol Spec if i cat ion, described in the DMTF specification document DSP0214). The programming interface between the two is mainly CSR-XML JSR48 (Java Spec if ication Reques t 48, The Java TM API for Web Based Enterpr i se Management).

 Existing methods for managing public information models in a variety of host environments manage access to multiple CIMOMs through a CIM aggregator that registers remote CIMOMs into the local knowledge base of the CIM aggregator and receives CIMs. After the client sends an operation request for the CIM resource, the local knowledge base is queried to determine whether it is processed by the local node's CIMOM or by the remote CIMOM. If remote CIMOM processing is required, the request route is forwarded to the remote CIMOM, and from the The remote CIMOM receives the result data and returns it to the request originator. However, there are two shortcomings in this scheme: First, the CIM aggregator is used as the access point of the CIM0M. When the CIM aggregator fails, the system is unavailable; secondly, in a large-scale distributed system, the CIM aggregator Due to the operation such as registration, it is difficult to obtain the dynamic information of CIM0M in the whole network in time. Summary of the invention

 The technical problem to be solved by the present invention is to provide a method and apparatus for acquiring CIM resources.

 According to a first aspect of the present invention, the present invention provides a method of obtaining a common information model CIM resource, the method comprising:

 The first node receives the request message for querying the CIM resource sent by the CIM client;

 The first node extracts the keyword content in the request message, and determines, according to the keyword content, that the request message is a resource for querying a single general information model object manager CIM0M or a CIM0M resource for querying all nodes.

 If the resource of a single CIM0M is queried, step a is performed. If the resources of the CIM0M of all nodes are queried, step b is performed.

a, the first node searches for the location information of the destination CIMOM according to the keyword content, and forwards the request message to the destination CIM0M according to the found location information, and receives the destination. a response message returned by the CIMOM, and forwarding the response message to the CIM client, b, the first node searching for location information of all nodes, and forwarding the request message to all nodes according to the found location information The CIMOM receives a response message returned by the CIMOM of all the nodes, and forwards the response message to the CIM client.

 Further, before the first node receives the request message for querying the CIM resource sent by the CIM client, the method further includes: the first node performing a hash operation on the IP address of the first node to generate a Va lue value; The service location protocol discovers all CIMOMs on the first node; acquires a universal resource identifier URI or a uniform resource locator URL of all CIMOMs on the first node, and hashes the URI or URL to obtain a Key value. To generate a Key-Va lue information table of the CIMOM; publish the generated Key-Va lue information table to the distributed hash table network.

 Further, the step a includes: the first node performs a hash operation on the URI or the URL in the keyword content in the request message to obtain a Key value; the first node according to the Key value and the The Key-Va lue information table in the distributed hash table network searches for a corresponding Va lue value; the first node forwards the request message to a destination CIMOM corresponding to the Va lue value; The response message returned by the destination CIMOM forwards the received response message to the CIM client.

 Further, the step b includes: the first node uses a Va lue value in a first item of the Key-Va lue information table of the first node in the distributed hash table network as a location information query result; The first node forwards the request message to the CIMOM of the node corresponding to the location information query result; the first node compares the location information query result to the first item in the Key-Va lue information table maintained by the node itself The Va lue value is used as the location information query result, and then the request message forwarding step is repeated until the first node receives the location information query result corresponding to the Va lue value in the first item of the Key-Va lue information table maintained by the node itself. The node is the first node; the first node receives a response message returned by the CIMOM of all the nodes, and forwards the received response message to the CIM client.

Further, the step b includes: the first node in a distributed hash table network The Va lue value in the first item of the Key-Va lue information table of the first node is used as a location information query result; the first node forwards the received request message to the CIM0M of the node corresponding to the location information query result. And appending the first node address information to the request message; so that the node corresponding to the Va lue value in the first item is Va in the first item of the Key-Va lue information table maintained by itself The CIM0M of the node corresponding to the lue value forwards the request message to which the first node address information is attached, and the nodes that receive the request message to which the first node address information is attached are maintained to themselves The CIM0M of the node corresponding to the Va1 ue value in the first item of the Key-Va lue information table forwards the request message to which the first node address information is attached until the above-mentioned first node address information is attached. The Va lue value corresponding node in the first item in the Key-Va lue information table maintained by the node of the request message is the first node; the first node receives the CIM0M of all the nodes according to the attached A node address information response message returned, it forwards the received response message to the C IM client.

 Further, the step b further includes: generating a new message identifier according to the message identifier of the request message, the address and port information of the CIM client, to identify a client that initiates the request message.

 Further, the CIM0M that forwards the request message to all the nodes according to the found location information specifically includes: querying, according to the message identifier in the request message, whether the new message identifier table of the first node includes the message identifier Corresponding new message identifier; if not, forwarding the request message to the CIM0M of the first node, and saving the new message identifier corresponding to the message identifier in the new message identifier table of the first node; otherwise, The request message is not forwarded to the CIM0M of the first node.

 According to a second aspect of the present invention, the present invention provides an apparatus for obtaining a common information model CIM resource, the apparatus comprising:

The CIM0M proxy is configured to receive a request message for querying the CIM resource sent by the CIM client to the first node, extract the keyword content in the request message, and determine, according to the keyword content, that the request message is a query for a single universal information model. The resource of the object manager CIM0M is also the resource of the CIM0M of all nodes; a DHT proxy, configured to: when the CIMMOM agent determines that the request message is a resource for querying a single CIM0M, search for location information of the destination CIM0M according to the keyword content; or when the CIMMOM agent determines that the request message is to query all nodes CIM0M Find the location information of all nodes when the resource is used;

 The CIM0M proxy is further configured to forward the request message to the CIM0M corresponding to the location information according to the location information searched by the DHT proxy, receive a response message returned by the CIM0M corresponding to the location information, and forward the received response message to the The C IM client.

 Further, the DHT proxy is further configured to perform a hash operation on the first node IP address to generate a Va lue value, and discover all CIM0Ms on the first node according to a service location protocol, and obtain all the first nodes. CIM0M's Universal Resource Identifier URI or Uniform Resource Locator URL, hashing the URI or URL to get the Key value to generate the CIM0M Key-Va lue information table, and publishing the generated Key-Va lue information table to The distributed hash table network.

 Further, the CIM0M agent is further configured to implement the release of the service capability of the node, where the release of the service capability includes: defining a service location protocol service type service type: DHT-CIM0M, according to the form of the service location protocol request/response Publish the service capability of the node; or, add the service-type=DHT-CIMOM field in the template defined by the distributed management working group to indicate the service capability of the node.

 Further, the determining, by the DHT agent, the location information of the destination CIM0M according to the keyword content, the method includes: performing a hash operation on the URI/URL in the keyword content to obtain a Key value; and according to the Key value and the distribution The Key-Va lue information table in the hash table network looks up the corresponding Va lue value.

 Further, the CIM0M proxy is further configured to generate a new message identifier according to the message identifier of the request message, the address and port information of the CIM client, to identify a client that initiates the request message.

Further, the CIM0M agent forwarding the request message to the CIM0M of all the nodes according to the location information found by the DHT proxy specifically includes: according to the message identifier in the request message Querying whether the new message identifier table of the first node includes a new message identifier corresponding to the message identifier; if not, forwarding a request message to the CIMOM of the first node and identifying a new message identifier corresponding to the message identifier And saving in the new message identifier table of the first node; otherwise, the request message is not forwarded to the CIMOM of the first node.

 Further, when the CIMOM agent determines that the request message is a resource for querying CIMOMs of all nodes, the DHT proxy is specifically configured to: use a Key-Va lue information table of the first node in the distributed hash table network The Value value in the first item is used as the location information query result, so that the CIMOM agent forwards the request message to the CIMOM of the corresponding node of the location information query result, and then the location information query result corresponds to the Key-Va lue information maintained by the node itself. The Va lue value in the first item of the table is used as the location information query result, so that the CIMOM agent repeats the above request message forwarding step until the DHT agent receives the Key-Va lue information maintained by the node corresponding to the location information query result. The node corresponding to the Va lue value in the first item of the table is the first node; or

 When the CIMOM agent determines that the request message is a resource for querying CIMOMs of all nodes, the DHT agent is specifically configured to: use the first item of the Key-Va lue information table of the first node in the distributed hash table network The Va lue value is used as a result of the location information query so that the CIMOM agent forwards the received request message to the CIMOM of the node corresponding to the location information query result and appends the first node address information to the request message; The node corresponding to the Va lue value in the first item forwards the CIMOM of the node corresponding to the Va lue value in the first item of the Key-Va lue information table maintained by itself to the node to which the first node address information is attached. a request message, and a node corresponding to the Va 1 ue value in the first item of the Key-Va ue information table maintained by each node that has received the request message to which the first node address information is attached The C IM0M forwards the request message to which the first node address information is attached, until the node that receives the request message to which the first node address information is attached is maintained by itself The first item in the Key-Va lue information table corresponding to the value Va lue node is the first node.

The method and apparatus of the present invention have the following beneficial effects: The CIMOM agent and the DHT agent enable the CIM client to obtain CIM resource information of a single CIMOM or CIMOM of all nodes in the network at any node, thereby realizing the acquisition of CIM resources in a large-scale, distributed multi-host environment. DRAWINGS

 In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

 FIG. 1 is a schematic diagram showing the relationship between a device for acquiring CIM resources and a CIM client and a CIM object manager according to an embodiment of the present invention.

 FIG. 1 is a schematic diagram showing a process of discovering CIMOM on a node and publishing a information table according to an embodiment of the present invention.

 FIG. 3 is a schematic flowchart diagram of a method for acquiring CIM resources according to an embodiment of the present invention. FIG. 4 is a schematic structural diagram of an apparatus for acquiring CIM resources according to an embodiment of the present invention. detailed description

 The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIG. 1, a schematic diagram of a relationship between a device for acquiring CIM resources and a CIM client and a CIM object manager according to an embodiment of the present invention is illustrated. The CIM client can obtain the resources of the CIM object manager CIMOM through the device that obtains the CIM resource. Among them, CIMOM runs on acquiring CIM resources. In the device, a device that acquires C IM resources can run one C IM0M or multiple CIM0Ms. In addition, the device for obtaining the C IM resource may be any node running CIM0M, where the node may be a host or a virtual machine. The CIM0M agent, the DHT agent, and the CIM0M agent that perform the function of acquiring CIM resources of the node may be performed by the processor of the host. Even though the device that acquires the CIM resource can be a virtual machine, the virtual machine is still a virtual machine running on the computer processor, so the CIM0M agent, the DHT agent, and the CIM0M agent still run in the processor of the computer.

 The method for obtaining CIM resources provided in the embodiments of the present invention is implemented by using any node in a distributed network. Specifically, the method can be implemented by a software form on a node or a combination of software and hardware. For convenience of description, a node that receives a request message for querying a C IM resource sent by a CIM client is referred to as a first node, so as to distinguish from other nodes that receive a request message forwarded by the first node, where the first node may be distributed. Any node within the network cannot be construed as a restrictive explanation.

 In the embodiment of the present invention, after the device that acquires the CIM resource on the first node is started, before receiving the request message for querying the CIM resource sent by the CIM client, the device may also include the first device that obtains the CIM resource on the first node. The CIM0M on the node and the Key-Va lue information table corresponding to the discovered CIM0M. Referring to FIG. 2, a schematic diagram of a CIM0M discovery and information table publishing process on a node according to an embodiment of the present invention is illustrated, which may specifically include:

 S200: Perform a hash operation on the first node IP address to generate a Va lue value.

 In the embodiment of the present invention, the IP address of the first node is hashed to generate a Va lue value of the Key-Va lue information table of the CIM0M on the node.

 S202. Discover all CIM0Ms on the first node according to a service location protocol.

In the embodiment of the present invention, one or more CIM0Ms may be running on one node, and each C IM0M on the same node is not associated with each other. The device that obtains the CIM resource by the node can discover all the CIM0Ms running on the same node according to the Servicing Protocol (SLP). Can be implemented by multicast method, specifically, the first node address needs to be added Entering a multicast address, that is, maintaining a multicast group having only the first node address, and then the first node, that is, the device acquiring the CIM resource, sends an SLP multicast request to the CIM0M in the multicast address; receiving the SLP multicast request The CIM0M returns its own CIM resource information in a unicast manner to the device of the first node that acquires the CIM resource.

 In some other implementation manners of the present invention, the method may be implemented by adding a Directory Retrieval Agent module on the first node. Specifically, all CIM0Ms on the first node register their own CIM resource information with the directory proxy module on the node.

 S204: Obtain a URI or a URL of all the CIM0Ms on the first node, perform a hash operation on the URI or the URL to obtain a Key value, and generate a Key-Va lue information table of the CIM0M.

 In the embodiment of the present invention, if the SLP is used to discover all the CIM0Ms on the first node, the first node obtains the URI or URL in the CIM resource information returned by each CIM0M through the unicast form, and hashes the obtained URI or URL. The operation obtains a Key value to generate a Key-Va lue information table for each CIM0M. If the CIM0M discovery is implemented by using the directory proxy module, the first node obtains the URI or URL of each CIM0M from the directory proxy module on the node, and hashes the obtained URI or URL to generate a Key value to generate a Key of each CIM0M. -Va lue information sheet.

 S206. Publish the generated Key-Va lue information table to the distributed hash table network.

 In the embodiment of the present invention, the first node sends the generated Key-Va lue information table of each CIM0M to the DHT network corresponding to the CIM0M according to the DHT algorithm known to those skilled in the art, where the DHT network corresponding to the CIM0M is existing. Distributed network. The issuance of the Key-Va lue information table refers to storing the Key-Va lue information table in a distributed manner on multiple nodes according to the DHT algorithm, and each node is responsible for storing a part of the Key-Va lue information table, thereby realizing the entire DHT network. Addressing and storage. Each node periodically runs a detection algorithm corresponding to each of the DHT algorithms to detect a CIM0M on a newly joined node or a CIM0M on an exit or a failed node, thereby updating the Key-Va lue information table of each node itself. The DHT algorithm includes, but is not limited to, Chord, CAN, Tapes try and Pas try algorithms.

Referring to FIG. 6 , a flow chart of a method for acquiring CIM resources according to an embodiment of the present invention is illustrated. The method includes the steps of:

 S400, the first node receives the request message for querying the CIM resource sent by the CIM client. It is noted that the first node may be any node in the distributed network, and the device that obtains the CIM resource may be in the distributed network. Any one node. Any node in the implementation of the present invention can acquire CIM resources. After being started on the first node, the first node can perform step 400 and subsequent steps of acquiring CIM resources. The request message for querying the CIM resource sent by the CIM client, that is, the request message for inquiring the CIM resource on the CIM0M or the CIM resource on the CIM0M of all the nodes initiated by the CIM client, the request message for querying the CIM resource is simply referred to as the request. The format of the message can be in the standard format of the Windows Management System (Windows Management Specification) or the WBEM (Web-Based Enterprise Management) standard format.

 The request message includes a message header and a message body, wherein the message body includes a key content identifying the request resource, a URI or URL information for identifying a single CIM0M, or an identifier of the CIM0M of all nodes. In the embodiment of the present invention, the host address is Al lHos tPath to identify the CIM0M of all nodes; in addition, the host address is null (Nul l ) to identify the CIM0M of all nodes. If the CIM resource on a single CIM0M is queried, the keyword content includes a URI or URL information that identifies a single CIM0M. If the CIM resource on the CIM0M of all nodes is queried, the keyword content includes all nodes. The identifier of the CIM0M, ie Al lHos tPath or Nul l.

 S402, the first node extracts the keyword content in the request message, and determines, according to the keyword content, whether the request message is a resource of a single CIM0M or a resource of a CIM0M of all nodes, and if a resource of a single CIM0M is queried, Step S404, if the resources of all nodes CIM0M are queried, step S406 is performed;

 In the embodiment of the present invention, the device that acquires the CIM resource of the first node extracts the keyword content of the message body in the request message, and determines that the request message is a single query according to the keyword content.

The CIM0M resource is also a resource for querying CIM0M of all nodes, if the keyword content is included If the URI or the URL information of the single CIMOM is identified, it is determined to query the resources of the single CIMOM, and step S404 is performed. If the keyword content includes the identifier of the CIMOM that identifies all the nodes, it is determined to query the CIMOM of all the nodes. The resource is executed in step S406.

 S404. The first node searches for location information of the destination CIMOM according to the keyword content, forwards the request message to the destination CIMOM according to the found location information, receives a response message returned by the destination CIMOM, and sends the response message. Forwarded to the CIM client;

 In the embodiment of the present invention, the step S404 performed by the first node may specifically include:

 Performing a hash operation on the URI or the URL in the keyword content to obtain a Key value; and searching for a corresponding Va lue value according to the Key value and the Key-Va lue information table in the DHT network;

 Forwarding the request message to the destination CIM0M corresponding to the Va lue value;

 Receiving a response message of the destination CIM0M, and forwarding the received response message to the CIM client;

 In the process of searching for the Va lue value according to the Key value and the Key-Va lue information table in the DHT network, the distributed hash table search algorithm well known to those skilled in the art may be used to improve the search efficiency, and is not limited to the embodiment of the present invention. The DHT lookup algorithm mentioned in . In the embodiment of the present invention, the found Va lue value corresponds to the location information of the node where the CIM0M of the request message is requested in the request message, and the Va lue value generation process can be used to determine the IP address of the node by using the Va lue value. address. After forwarding the request message to the destination CIM0M corresponding to the Va lue value, receiving the response message to the request message returned by the destination CIM0M, and then forwarding the received response message to the CIM client, that is, the CIM client that initiates the request message End, wherein the response message includes CIM resource information in the request message requesting the query.

 S406. The first node searches for location information of all the nodes, forwards the request message to the CIM0M of all nodes according to the found location information, receives a response message returned by the CIM0M of all the nodes, and forwards the response message to The CIM client.

In an embodiment of the present invention, if the keyword content of the request message includes an identifier The identifier of the CIMOM of the node, Al lHos tPath or Nul l , requests the message request to query the CIM resources on the CIMOM of all nodes.

 Searching for the location information of all nodes and forwarding the request message to the CIMOM implementation of all nodes according to the found location information, as described in the release process description of the Key-Va lue information table, due to the Key-Va lue information of different nodes The table may include the Key-Va lue information table of the same CIMOM. To avoid forwarding the request message to the corresponding CIMOM in the Key-Va lue information table of all nodes, some CIMOMs will receive the same request message multiple times, and each node Key- The first item Va lue value in the Va lue information table is usually not repeated. The present invention avoids the above problem by forwarding the request message only to the CIMOM corresponding node of the Value value in the first item of the node Key-Va lue information table. Two embodiments are provided in the embodiments of the present invention. The first embodiment can be processed as follows:

 The Va lue value in the first item of the Key-Va lue information table of the first node in the DHT network is used as the location information query result;

 Forwarding the request message to the CIM0M of the location information query result corresponding node; using the location information query result corresponding to the Va lue value in the first item of the Key-Va lue information table maintained by the node itself as the location information query result And repeating the request message forwarding step, until the node that requests the first node to receive the location information query result corresponding to the Va 1 ue value in the first item of the Key-Va ue information table maintained by the node itself is the First node;

 Receiving a response message of the CIM0M backhaul of all the nodes, and forwarding the received response message to the CIM client.

Specifically, the first node that receives the request message (referred to as "N1" node for convenience of description, is merely for convenience of description, and may be represented by any other symbol, and should not be construed as a restrictive explanation.) The Va lue value in the first item of the Key-Va lue information table of the N1 node (the Key-Va lue information table may include the CIM0M of one node or the Key-Va lue information of the CIM0M of one or more nodes) as the request message Purpose CIM0M location information query result, and then query the location corresponding node to the location information (ie, the next section in the N1 node Key-Va lue information table) The CIMOM forwarding request message, which is referred to as the "N2" node, is: N1->N2, and obtains the location information query result returned by N2, that is, in the first item of the Key-Va lue information table maintained by the N2 node itself. Va lue value. Then, the first node uses the Va lue value in the first item of the Key-Va lue information table maintained by the N2 node as the location information query result of the destination CIMOM of the request message, and the first in the N2 node Key-Va lue information table. The Va lue value in the entry corresponds to the CIMOM forwarding request message of the node (referred to as the "N3" node), namely: N1->N3. So, the first node continually uses the Va lue value in the first item in the Key-Va lue information table of the node that received the request message as the location information query result until the Key-Va lue of the node that received the request message The Va lue value corresponding node in the first item in the information table is the initial node N1 that receives the CIM client request message. It should be noted that, in the request message forwarding process, after the location information Va lue value is learned, a person skilled in the art may use a known technical means to forward the request message to the CIM0M on the corresponding node of the Va lue value. The device for acquiring the CIM resource of the first node receives the response message returned by each CIM0M that has received the request message, and then forwards the received response message to the CIM client that initiated the request, where the response message includes the request message requesting the query. CIM resource information. It should be noted that, in the process of forwarding the received response message to the CIM client that initiated the request, the device that obtains the CIM resource may forward the returned response message to the initiation request after receiving the response message returned by the CIM0M. The CIM client can also package all CIM0M response messages on the same node into a response message and forward it to the requesting request after receiving all the response messages returned by all CIM0Ms on the same node (more than one CIM0M can be included on one node). CIM client.

 Specific steps of the second embodiment may include:

 The first node uses the Va lue value in the first item of the Key-Va lue information table of the first node in the distributed hash table network as the location information query result;

 The first node forwards the received request message to the CIM0M of the corresponding node of the location information query result, and adds the first node address information to the request message;

The Va lue value in the first item corresponds to the Key-Va lue information table maintained by the node to itself. The Va lue value in the first item corresponds to the CIMOM of the node forwarding the request message to which the first node address information is attached;

 Each node that receives the request message to which the first node address information is attached forwards the first node address to the CIMOM of the corresponding node of the Va lue value in the first item of the Key-Va lue information table maintained by itself a request message of information, until the Va lue value corresponding node in the first item in the Key-Va lue information table maintained by the node itself that receives the request message to which the first node address information is attached is the first node;

 The first node receives the response message returned by the CIMOM of all the nodes according to the additional first node address information, and forwards the received response message to the C IM client.

Specifically, the Va lue value in the first item of the Key-Va lue information table of the first node (referred to as a "K1" node for convenience of description) in the DHT network (where the Key-Va of the first node) The Va lue value in the first item of the lue information table is the result of the location information query. The corresponding node (referred to as the "K2" node) forwards the request message to which the K1 node address information is attached, that is, K1->K2, then Κ2 The device for acquiring the CIM resource of the node forwards the request message to which the K1 node address information is attached to the Va lue value corresponding node (referred to as "K3, node") in the first item of the Key-Va lue information table maintained by the node 2 itself. That is: Κ2->Κ3, the Va in the first item of the Key-Va ue information table maintained by the device that acquires the C ΙΜ resource on each node of the request message to which the K1 node address information is attached is received The CIM0M corresponding to the node of the lue value forwards the request message to which the K1 node address information is attached, until the Va lue value corresponding node in the first item in the Key-Va lue information table of the node to which the K1 node address information is attached is received. Is the K1 node. Received The CIM0M of the request message may return the response message to the device for acquiring the CIM resource of the first node according to the node address information attached to the request message, and the device that obtains the CIM resource of the first node receives the response message returned by each CIM0M, and may After receiving the response message, the received response message is forwarded to the CIM client that initiated the request, and may also receive all the response messages of all CIM0Ms (which may include more than one CIM0M on the same node) on the same node. All response messages are packaged as a response message forwarded to the CIM client that initiated the request. In the embodiment of the present invention, in addition to the foregoing two embodiments, the CIM0M forwarding request message of all Va lue value corresponding nodes in the Key-Va lue information table of all nodes may be generated by generating a new node identifier. Avoid some CIM0Ms receiving the same request message multiple times during the process.

 In the embodiment of the present invention, the same may exist in the Key-Va lue information table of different nodes.

The Key-Va lue information table of CIM0M, in other words, the Key-Va lue information table of the same CIM0M can be stored in the Key-Va lue information table of multiple nodes. In the process of forwarding the request message to the corresponding CIM0M in the Key-Va lue information table of all the nodes, the same CIM0M is saved because the Key-Va lue information of the same CIM0M is stored in the Key-Va lue information table of the multiple nodes. The request message forwarded by each of the plurality of nodes is received.

 To avoid the above situation, the first node generates a new message identifier NewMes sagelD to identify the client that initiated the request message by identifying the Mes sagelD according to the message of the request message, the address and port information of the CIM client that initiated the request message, and then the Mes The sagelD and NewMes sagelD are stored in the first node's Mes sagelD and NewMes sagelD correspondence tables, namely the new message identification table, Mes sagelD and NewMes sagelD - in the table, and replace the message identifier in the request message with NewMes sagelD. In the process of forwarding the request message to the CIM0M of all the nodes, querying, according to the message identifier in the request message, whether the new message identifier table of the first node includes a new message identifier corresponding to the message identifier, and if not, The CIM0M of the first node forwards the request message, and saves the new message identifier corresponding to the message identifier to the new message identifier table of the first node. Otherwise, the request message is not forwarded to the CIM0M of the first node. After determining, by the first node, whether the CIM0M forwarding request message on the first node is processed, the first node forwards the request message to the corresponding CIM0M of the Key-Va lue information table of the first node.

It should be noted that the generation and judgment of the foregoing new message identifiers are applicable to all nodes, and are not limited to the first node that receives the CIM client request message, or may be other nodes that receive the request message forwarded by the first node. The manner in which the CIM client is identified by using the above new message identifier is to forward the request message to all the Va lue values of the information table of all nodes corresponding to the CIM0M of the node. In the process, the first node address information of the CIM client request message may be additionally received in the request message, so that the CIM0M of each node that receives the request message may respond according to the additional first node address information. The message is returned. When the device that acquires the CIM resource of the first node identifies the received message as a response message of NewMes sagelD, the message identifier in the response message is replaced with Mes sagelD and forwarded to the CIM client that initiates the request message.

 In the embodiment of the present invention, the new message identifier NewMes sagelD may be generated according to the message identifier Mes sagelD in the message body of the request message, and the address and port information of the CIM client that initiates the request message to identify the client that initiated the request message. Specifically, the new message identifier NewMes sagelD may be generated by using the message identifier Mes sageID in the message body of the request message, the address of the CIM client that initiates the request message, and the port information to identify the client that initiates the request message. In an embodiment of the present invention, the message identifier in the request message is Mes sageID= , 87872 " and can be generated by NewMes sageID=Hash ( , , 87872+10. 138. 73. 32+5900 " ) =5986324501 NewMes sagelD, where 10. 138. 73. 32 is the address information of the client, and 5900 is the port information.

 The method for acquiring CIM resources of the present invention is described above with reference to the accompanying drawings. The apparatus for acquiring CIM resources of the present invention will be described below with reference to the accompanying drawings.

 Referring to FIG. 4, a schematic diagram of an apparatus for acquiring a CIM resource according to an embodiment of the present invention is illustrated. The apparatus 400 for acquiring a CIM resource may be a first node that runs the CIM0M, and specifically includes:

 The CIM0M proxy 502 is configured to receive a request message for querying a CIM resource sent by the CIM client to the first node, extract a keyword content in the request message, and determine, according to the keyword content, that the request message is a query for a single general information. The resource of the model object manager CIM0M is also the resource of the C IM0M of all nodes;

The DHT proxy 504 is configured to: when the CIMM0M agent determines that the request message is a resource for querying a single CIM0M, search for location information of the target CIM0M according to the keyword content; or when the CIMM0M agent determines that the request message is to query all nodes. When looking for resources of C IM0M, find all Location information of the node;

 The CIMOM proxy 502 is further configured to forward the request message to the CIM0M corresponding to the location information according to the location information searched by the DHT proxy, receive the response message returned by the CIM0M corresponding to the location information, and forward the received response message. To the CIM client.

 In the embodiment of the present invention, the CIMOM Agent (CIMOM Agent) receives the request message for querying the CIM resource sent by the CIM client, parses the request message to extract the keyword content in the message body, and determines the request according to the extracted keyword content. The message is to query CIM resources on a single CIM0M or to query CIM resources on CIM0M of all nodes. The keyword content includes a URI or a URL or an identifier that identifies all CIM0Ms. In the embodiment of the present invention, the identifiers of all CIM0Ms are Al lHos tPath or Nul l. If the content of the keyword is URI or URL information, the request message is a CIM resource on a single CIM0M. If the content of the keyword is Al lHos tPath or Nul l , the request message is a CIM resource on all CIM0Ms.

 The DHT agent provided by the present invention can be used not only to implement the above-mentioned search function, but also to implement the discovery of the CIM0M on the node and the release of the information table.

 Hashing the first node IP address to generate a Va lue value;

 Allocating all CIM0Ms on the first node according to the service location protocol request;

 Obtaining a URI or a URL of all the CIM0Ms on the first node, performing a Hash operation on the URI or the URL to obtain a Key value to generate a Key-Va lue information table of the CIM0M;

 Publish the generated Key-Va lue information table to the DHT network.

 In the embodiment of the present invention, the DHT network is a network formed by hashing the URI or URL of the CIM0M to generate a Key value and an IP address of a node where the CIM0M is located, and generating a Key-Va lue information table by generating a Va lue.

 In the embodiment of the present invention, multiple CIM0Ms may be running on one node. One or more CIM0Ms may be running on a node, where there is no correlation between CIMOMs on the same node. A device that acquires a CIM resource can discover all the same nodes running according to the service location protocol.

CIM0M. Can be implemented by multicasting, specifically, the first node address needs to be added to the multicast Address, that is, maintaining a multicast group having only the first node address, and then the first node, that is, the device acquiring the CIM resource, sends an SLP multicast request to the CIMOM in the multicast address; the CIMOM receiving the SLP multicast request will The CIM resource information of the CIM is returned to the DHT proxy of the first node in a unicast manner; the DHT proxy obtains the URI or URL of each CIMOM, performs a hash operation on the URI or the URL to obtain a Key value, and generates a Key-Va lue corresponding to the CIMOM. The information table is then distributed to the DHT network according to the DHT algorithm, and the CIM resource information on the CIMOM uniquely identified by the Key value is stored in a plurality of nodes according to the DHT algorithm. Each node is responsible for storing a small number of Key-Va lue information tables, thereby realizing addressing and storage of the entire DHT network, and the DHT agents on each node periodically run the respective detection algorithms corresponding to the DHT algorithms to detect new ones. Adding a CIM0M on the node or a CIM0M on the exit/failed node, thereby updating the Key-Va lue information table of each node itself, wherein the DHT algorithm includes, but is not limited to, Chord, CAN, Tapes try and Pas try algorithms.

 In the embodiment of the present invention, the discovery of all CIM0M resource information running on the same node may be implemented by adding a directory proxy module to the node, in addition to being implemented in the above multicast manner. Specifically, all CIM0Ms running on the first node register their own CIM resource information with the directory proxy module, and then the DHT proxy extracts the CIM0M registered resource information from the directory proxy module, and obtains the CIM0M URI or the extracted resource information. The URL, the obtained URI or URL is hashed to obtain a Key value, and then a Key-Va lue information table of CIM0M is generated, and then the generated Key-Va lue information table is published to the DHT network. It should be noted that although the first node is taken as an example in the embodiment, all the CIM0Ms running on the node can be found on all nodes in the above manner.

In the embodiment of the present invention, if the CIM resource on the single CIM0M is queried, the DHT proxy searches for the location information of the destination CIM0M according to the URI or the URL in the keyword content, and specifically includes: a URI or a URL in the keyword content. Performing a hash operation to obtain a Key value; searching for a corresponding Va lue value according to the Key value and a Key-Va lue information table in the DHT network, where the Va lue value is a location information of a destination CIM0M requesting a query in the request message. In the DHT agent query to the destination After the location information of the CIMOM, the CIMOM proxy forwards the request message to the destination CIMOM corresponding to the Va lue value, receives the response message returned by the destination CIMOM, and forwards the received response message to the CIM client that initiated the request message.

 If the resources of all nodes CIMOM are queried, the DHT agent searches for location information of all nodes in the DHT network, and the CIMOM agent forwards the request message according to the location information searched by the DHT proxy, receives the returned response message, and forwards the received response message to the originating message. The requested CIM client.

 Searching for the location information of all nodes and forwarding the request message to the CIMOM implementation of all nodes according to the found location information, as described in the release process description of the Key-Va lue information table, due to the Key-Va lue information of different nodes The table may include the Key-Va lue information table of the same CIMOM. To avoid forwarding the request message to the corresponding CIM0M in the Key-Va lue information table of all nodes, some CIM0Ms may receive the same request message multiple times, and each node Key- The first item Va lue value in the Va lue information table is usually not repeated. The present invention avoids the above problem by forwarding the request message only to the CIM0M corresponding to the value of the node in the first item of the node Key-Va lue information table. Two embodiments are provided in the embodiments of the present invention.

 The first embodiment may include the steps: the DHT proxy of the first node uses the Va lue value in the first item of the Key-Va lue information table of the first node in the distributed hash table network as the location information query result so that The CIM0M proxy of the first node forwards the request message to the CIM0M of the node corresponding to the location information query result, and the DHT proxy of the first node further compares the location information query result to the Key-Va lue information table maintained by the node itself. The Va lue value in one item is used as the location information query result, so that the CIM0M agent of the first node repeats the foregoing request message forwarding step (that is, the forwarding step of forwarding the request message to the CIM0M corresponding to the location information query result node), until the The node corresponding to the Va lue value in the first item of the Key-Va lue information table maintained by the node corresponding to the location information query result is the first node.

The second embodiment may include the following steps: the DHT proxy of the first node uses the Va lue value in the first item of the Key-Va lue information table of the first node in the distributed hash table network as the location information query result. a node's CIM0M agent queries the node corresponding to the location information query result The CIMOM forwards the received request message and appends the first node address information to the request message; to facilitate the node corresponding to the Va lue value in the first item to maintain the Key-Va lue information table of itself The CIM0M of the node corresponding to the Va lue value in the first item forwards the request message to which the first node address information is attached, and in order to receive the request message to which the first node address information is attached The node forwards the request message to which the first node address information is attached to the CIM0M of the node corresponding to the Va lue value in the first item of the Key-Va lue information table maintained by itself, until receiving the above-mentioned attached first message The Va lue value corresponding node in the first item in the Key-Va lue information table maintained by the node of the request message of the node address information is the first node.

 It should be noted that although the foregoing description of the first embodiment and the second embodiment is based on the first node, the lookup and forwarding process can be applied to the DHT proxy and the CIM0M proxy of any node in the distributed network.

 In the embodiment of the present invention, the CIM0M proxy may be further configured to generate a new message identifier according to the message identifier of the request message, the address and port information of the CIM client that initiates the request message, to identify the client that initiates the request message. Through this function, when the CIM0M forwarding request message corresponding to all Va lue value nodes in the Key-Va lue information table of all nodes is used in the process of forwarding the request message to the CIM0M of all nodes, the CIM0M of some nodes can be avoided from being received multiple times. To the same request

In the embodiment of the present invention, the CIM0M agent performs a hash operation on the message identifier Mes sageID in the message body of the request message, the address and port information of the CIM client that initiates the request message, and generates a new message identifier NewMes sagelD to identify the request message. Client. In an embodiment of the present invention, the message identifier in the request message is Mes sageID= , 87872", and NewMes can be generated by NewMes sageID=Hash (" 87872+10. 138. 73. 32+5900" ) =5986324501 sagelD, where 10. 138. 73. 32 is the client's address information, 5900 is the port information. Mes sagelD and NewMes sagelD can be saved to the corresponding table of Mes sagelD and NewMes sagelD on the first node, ie the new message identification table, table Mes sagelD and NewMes sagelD corresponds one-to-one and replaces the message ID in the request message with NewMes sageID. In the process that the CIMOM agent of the first node forwards the request message to the CIMOM of all the nodes according to the location information found by the DHT proxy of the first node, and queries the new message identifier table of the first node according to the message identifier in the request message. Whether the new message identifier corresponding to the message identifier is included, if not, forwarding the request message to the CIMOM of the first node, and saving the new message identifier corresponding to the message identifier to the new message identifier of the first node Table, otherwise, does not forward the request message to the CIMOM of the first node, and after all the determination processing of the CIMOM forwarding request message to the first node is completed, all Va lue values of the Key-Va lue information table of the first node are The corresponding node forwards the request message. It should be noted that the generation and judgment of the foregoing new message identifiers are applicable to all nodes, and are not limited to the first node that receives the CIM client request message, or may be other nodes that receive the request message forwarded by the first node. In the process of using the new message identifier to identify the CIM client, in the process of forwarding the request message to the CIM0M of the node corresponding to all the Va lue values of the information table of all the nodes, the CMI client request may be directly received in the request message. The first node address information of the message is such that the CIM0M of each node receiving the request message can return the response message to the CIM0M agent of the first node according to the additional first node address information, and the CIM0M agent will receive the message. When the response message is identified as NewMes sagelD, the message identifier in the response message is replaced with Mes sagelD and forwarded to the CIM client that initiated the request message.

 In the embodiment of the present invention, in order for the CIM client to discover the service capability of the node, the CIM0M proxy can perform the service capability release in two ways, namely, the CIM0M service release attribute field that defines the SLP service type and the extended DMTF template. Specifically, the method includes: defining a service location protocol service type service type: DHT-CIM0M, and publishing a service capability of the node according to the service location protocol request/response; or adding a serv ice-type= to a template defined by the DMTF The DHT-CIMOM field is used to indicate the service capabilities of the node.

The method and device for acquiring the CIM resource of the present invention can be flexibly managed by the CHT0M in the network according to the DHT algorithm by any node of the distributed network, and can also be connected from any node. The incoming CIM client can obtain CIM resources on a single CIMOM or all CIMOMs in a distributed network, and realizes the acquisition of CIM resources in a large-scale, distributed multi-host environment.

 In addition, the device (ie, the node) for acquiring the CIM resource in the foregoing embodiment of the present invention may be a network device in the network, or may be a device such as a computer. The agents of the above-mentioned embodiments of the present invention (such as the CIMOM agent, the DHT agent) may be functional modules that are executed in the processor of the above device, and the present invention is not limited thereto.

 A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. In execution, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

 The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make several improvements and changes without departing from the principles of the present invention. The scope of protection of the invention.

Claims

Rights request  A method for obtaining a common information model CIM resource, the method comprising:  The first node receives the request message for querying the CIM resource sent by the CIM client;  The first node extracts the keyword content in the request message, and determines, according to the keyword content, whether the request message is a resource for querying a single general information model object manager CIMOM or a CIMOM resource of all nodes.  If the resource of a single CIMOM is queried, step a is performed. If the resources of the CIMOM of all nodes are queried, step b is performed.  a first node searches for the location information of the destination CIMOM according to the keyword content, forwards the request message to the destination CIMOM according to the found location information, receives a response message returned by the destination CIMOM, and The response message is forwarded to the CIM client, b, the first node searches for location information of all nodes, forwards the request message to the CIMOM of all nodes according to the found location information, and receives the CIMOM return of all the nodes. a response message and forward the response message to the CIM client. 2. The method according to claim 1, wherein before the first node receives the request message for querying the CIM resource sent by the CIM client, the method further includes:  The first node performs a hash operation on the first node IP address to generate a Value value; and discovers all CIMOMs on the first node according to a service location protocol;  Obtaining a universal resource identifier URI or a uniform resource locator URL of all CIMOMs on the first node, and hashing the URI or URL to obtain a Key value to generate a Key-Value information table of the CIMOM;  Publish the generated Key-Value information table to the distributed hash table network. 3. The method according to claim 2, wherein the step a comprises: The first node performs a hash operation on the URI or the URL in the keyword content in the request message to obtain a Key value;  The first node searches for a corresponding Value value according to the Key value and a Key-Value information table in the distributed hash table network;  The first node forwards the request message to the destination CIMOM corresponding to the value of the value; the first node receives the response message returned by the destination CIMOM, and forwards the received response message to the CIM client. 4. The method of claim 2, wherein the step b comprises:  The first node uses the Value value in the first item of the Key-Value information table of the first node in the distributed hash table network as the location information query result;  The first node forwards the request message to a CIMOM of a node corresponding to the location information query result;  The first node uses the value of the location information query result corresponding to the value of the first item in the Key-Value information table maintained by the node as the location information query result, and then repeats the request message forwarding step until the first node receives the The node corresponding to the value of the value in the first item of the Key-Value information table maintained by the node itself is the first node;  The first node receives a response message returned by the CIMOM of all the nodes, and forwards the received response message to the CIM client. 5. The method of claim 2, wherein the step b comprises:  The first node uses the Value value in the first item of the Key-Value information table of the first node in the distributed hash table network as the location information query result; The first node forwards the received request message to the CIMOM of the node corresponding to the location information query result, and attaches the first node address information to the request message; The node corresponding to the Value value in the first item forwards the request to which the first node address information is attached to the CIMOM of the node corresponding to the Value value in the first item of the Key-Value information table maintained by itself. a message, and a node that facilitates receiving the request message to which the first node address information is attached, forwards the CIMOM of the node corresponding to the Value value in the first item of the Key-Value information table maintained by itself a request message to which the first node address information is attached, until the value corresponding to the value in the first item in the Key-Value information table maintained by the node itself to which the request message to which the first node address information is attached is received is the first One node  The first node receives the response message returned by the CIMOM of all the nodes according to the attached first node address information, and forwards the received response message to the CIM client.  The method of claim 2, wherein the step b further comprises: generating a new message identifier according to the message identifier of the request message, the address of the CIM client, and port information to identify the request message. Client. The method of claim 6, wherein the CIMOM that forwards the request message to all nodes according to the found location information specifically includes:  Determining, according to the message identifier in the request message, whether the new message identifier table of the first node includes a new message identifier corresponding to the message identifier,  If not included, the request message is forwarded to the CIMOM of the first node, and the new message identifier corresponding to the message identifier is saved in the new message identifier table of the first node,  Otherwise, the request message is not forwarded to the CIMOM of the first node. 8. An apparatus for obtaining a common information model CIM resource, the apparatus comprising: a CIMOM proxy, configured to receive a request message for querying a CIM resource sent by the CIM client to the first node, extract a keyword content in the request message, and determine, according to the keyword content The request message is a resource for querying a single general information model object manager CIMOM or a resource for querying CIMOM of all nodes;  a DHT proxy, configured to: when the CIMMOM agent determines that the request message is a resource for querying a single CIMOM, search for location information of the target CIMOM according to the keyword content; or for when the CIMMOM agent determines that the request message is to query all nodes CIMOM Find the location information of all nodes when the resource is used;  The CIMOM proxy is further configured to: forward the request message to the CIMOM corresponding to the location information according to the location information of the DHT proxy search, receive a response message returned by the CIMOM corresponding to the location information, and forward the received response message to the The CIM client. The device according to claim 8, wherein the DHT proxy is further configured to perform a hash operation on the first node IP address to generate a Value value, and discover all the first nodes according to a service positioning protocol. CIMOM, obtaining a universal resource identifier URI or a uniform resource locator URL of all CIMOMs on the first node, hashing the URI or URL to obtain a Key value to generate a CIMOM Key-Value information table, The generated Key-Value information table is published to the distributed hash table network. The device according to claim 9, wherein the CIMOM agent is further configured to implement the release of the service capability of the node, and the release of the service capability includes:  Defining the service location protocol service type service type: DHT-CIMOM, publishing the service capability of the node according to the service location protocol request/response; or adding service-type=DHT-CIMOM to the template defined by the distributed management working group Field to indicate the service capabilities of the node. The device according to claim 9, wherein the DHT agent searches for the location information of the destination CIMOM according to the keyword content, and specifically includes: Performing a hash operation on the URI/URL in the keyword content to obtain a Key value; And searching for a corresponding Value value according to the Key value and a Key-Value information table in the distributed hash table network. The device according to claim 9, wherein the CIMOM proxy is further configured to generate a new message identifier according to the message identifier of the request message, the address and port information of the CIM client, to identify the request message. Client. The device according to claim 12, wherein the CIMOM agent forwards the request message to all nodes according to the location information found by the DHT agent, and specifically includes:  Determining, according to the message identifier in the request message, whether the new message identifier table of the first node includes a new message identifier corresponding to the message identifier,  If not included, the request message is forwarded to the CIMOM of the first node, and the new message identifier corresponding to the message identifier is saved in the new message identifier table of the first node,  Otherwise, the request message is not forwarded to the CIMOM of the first node. 14. Apparatus according to claim 9 wherein: When the CIMOM agent determines that the request message is a resource for querying CIMOMs of all nodes, the DHT proxy is specifically configured to: in a first item of the Key-Value information table of the first node in the distributed hash table network The Value value is used as the location information query result, so that the CIMOM proxy forwards the request message to the CIMOM of the corresponding node of the location information query result, and then the location information query result corresponds to the first item of the Key-Value information table maintained by the node itself. The value of the value is used as the result of the location information query, so that the CIMOM agent repeats the request message forwarding step, until the DHT agent receives the location information query result in the first item of the Key-Value information table maintained by the node itself. The node corresponding to the Value value is the first node; or when the CIMOM agent determines that the request message is a resource for querying CIMOMs of all nodes The DHT proxy is specifically configured to: use the first node in the distributed hash table network The value of the value in the first item of the Key-Value information table is used as a result of the location information query, so that the CIMOM agent forwards the received request message to the CIMOM of the node corresponding to the location information query result, and attaches the first message to the request message. a node address information; wherein the node corresponding to the Value value in the first item is forwarded to the CIMOM of the node corresponding to the Value value in the first item of the Key-Value information table maintained by itself; a request message of a node address information, and a value corresponding to a value in the first item of the Key-Value information table maintained by the nodes that are received by the node to which the first node address information is attached The CIMOM of the node forwards the request message to which the first node address information is attached until the first item in the Key-Value information table maintained by the node itself that receives the request message to which the first node address information is attached is received. The value corresponding to the node is the first node.