Examples

Working with environemt variables

Working with files

Then you can access the single values like this AWSSECRETS#/appxyz/service1-db-config|host ==> export SERVICE1_DB_CONFIG__HOST='db.internal'

Alternatively if you are configmanager-ing a file via the fromstr command and the input is something like this:

(YAML)

app:
  name: xyz
db:
  host: AWSSECRETS#/appxyz/service1-db-config|host
  port: AWSSECRETS#/appxyz/service1-db-config|port
  pass: AWSSECRETS#/appxyz/service1-db-config|pass

which would result in this

app:
  name: xyz
db:
  host: db.internal
  port: 3306
  pass: sUp3$ecr3T!

If your config parameter matches the config interface, you can also leave the entire token to point to the db key

app:
  name: xyz
db: AWSSECRETS#/appxyz/service1-db-config

result:

app:
  name: xyz
db: {
  "host": "db.internal",
  "port": 3306,
  "pass": "sUp3$ecr3T!",
}

Go API Examples

One of the sample use cases includes implementation in a K8s controller.

E.g. your Custom CRD stores some values in plain text that should really be secrets/nonpublic config parameters - something like this can be invoked from inside the controller code using the generator pkg API.

See examples for more examples and tests for sample input/usage

package main

import (
	"context"
	"fmt"

	"github.com/DevLabFoundry/configmanager/v2/pkg/generator"
	"github.com/DevLabFoundry/configmanager/v2"
)

func main() {
	cm := &configmanager.ConfigManager{}
	cnf := generator.NewConfig()
	// JSON Marshal K8s CRD into
	exampleK8sCrdMarshalled := `apiVersion: crd.foo.custom/v1alpha1
kind: CustomFooCrd
metadata:
	name: foo
	namespace: bar
spec:
	name: baz
	secret_val: AWSSECRETS#/customfoo/secret-val
	owner: test_10016@example.com
`
	pm, err := cm.RetrieveWithInputReplaced(exampleK8sCrdMarshalled, *cnf)

	if err != nil {
		panic(err)
	}
	fmt.Println(pm)
}

Above example would ensure that you can safely store config/secret values on a CRD in plain text.

Or using go1.19+ generics example.

Beware logging out the CRD after tokens have been replaced.

Samlpe call to retrieve from inside an app/serverless function to only grab the relevant values from config.

package main

import (
	"context"
	"fmt"
	"log"
	"os"

	"github.com/DevLabFoundry/configmanager/v2"
	"github.com/DevLabFoundry/configmanager/v2/pkg/generator"
)

var (
	DB_CONNECTION_STRING    string = "someuser:%v@tcp(%s:3306)/someschema"
	DB_PASSWORD_SECRET_PATH string = os.Getenv("DB_PASSWORD_TOKEN")
	DB_HOST_URL             string = os.Getenv("DB_URL_TOKEN")
)

func main() {
	connString, err := credentialString(context.TODO, DB_PASSWORD_SECRET_PATH, DB_HOST_URL)
	if err != nil {
		log.Fatal(err)
	}

}

func credentialString(ctx context.Context, pwdToken, hostToken string) (string, error) {

	cnf := generator.NewConfig()

	pm, err := configmanager.Retrieve([]string{pwdToken, hostToken}, *cnf)

	if err != nil {
		return "", err
	}
	if pwd, ok := pm[pwdToken]; ok {
		if host, ok := pm[hostToken]; ok {
			return fmt.Sprintf(DB_CONNECTION_STRING, pwd, host), nil
		}
	}

	return "", fmt.Errorf("unable to find value via token")
}

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