8000 howto coredump when dropping root privileges by dothebart · Pull Request #6421 · arangodb/arangodb · GitHub
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Sep 7, 2018
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howto coredump when dropping root privileges #6421

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howto coredump when dropping root privileges
dothebart Sep 7, 2018
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dothebart Sep 7, 2018
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howto coredump when dropping root privileges
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@dothebart
dothebart committed Sep 7, 2018
commit 3139330312cd4832893b8519fff73cef70aa5401
32 changes: 28 additions & 4 deletions README_maintainers.md
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Expand Up @@ -463,10 +463,34 @@ In order to use automatic coredump analysis with the unittests you need to confi
Please note that we can't support [Ubuntu Apport](https://wiki.ubuntu.com/Apport).
Please use `apport-unpack` to send us the bare coredumps.

Solaris Coredumps
=================
Solaris configures the system corefile behaviour via the `coreadm` programm.
see https://docs.oracle.com/cd/E19455-01/805-7229/6j6q8svhr/ for more details.
In order to get coredumps from binaries changing their UID the system needs to be told that its allowed to write cores from them.
Default ArangoDB installations will do exactly that, so the following is neccessary to make the system produce coredumps from
production arangodb instances:

Edit `/etc/security/limits.conf` to contain:
```
arangodb - core infinity
```

Edit the systemd unit file `/lib/systemd/system/arangodb3.service` (USE infinity!!!):

```
## setting for core files
# Any dir that is writable by the user running arangod
WorkingDirectory=/var/lib/arangodb3
# core limit - set this to infinity to enable cores
LimitCORE=0
```

enable new systemd settings:
`systemctl daemon-reload && systemctl restart arangodb3.service`

enable suid process dumping:
`echo 1 >/proc/sys/fs/suid_dumpable`

make the above change permanent:

`echo "sys.fs.suid_dumpable = 1 >> /etc/sysctl.d/99-suid-coredump.conf`
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LBadTM


Analyzing Coredumps on Linux
============================
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