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Additional volumes capability (#736)

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* Allow additional Volumes to be mounted

* added TargetContainers option to determine if additional volume need to be mounter or not

* fixed dependencies

* updated manifest additional volume example

* More validation

Check that there are no volume mount path clashes or "all" vs ["a", "b"]
mixtures. Also change the default behaviour to mount to "postgres"
container.

* More documentation / example about additional volumes

* Revert go.sum and go.mod from origin/master

* Declare addictionalVolume specs in CRDs

* fixed k8sres after rebase

* resolv conflict

Co-authored-by: Dmitrii Dolgov <9erthalion6@gmail.com>
Co-authored-by: Thierry <thierry@malt.com>
This commit is contained in:
Thierry Sallé
2020-04-15 09:13:35 +02:00
committed by GitHub
co-authored by Dmitrii Dolgov Thierry
parent a1f2bd05b9
commit ea3eef45d9
8 changed files with 364 additions and 6 deletions
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docs/reference/cluster_manifest.md
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@@ -154,6 +154,18 @@ These parameters are grouped directly under the `spec` key in the manifest.
[the reference schedule format](https://kubernetes.io/docs/tasks/job/automated-tasks-with-cron-jobs/#schedule)
into account. Optional. Default is: "30 00 \* \* \*"
* **additionalVolumes**
List of additional volumes to mount in each container of the statefulset pod.
Each item must contain a `name`, `mountPath`, and `volumeSource` which is a
[kubernetes volumeSource](https://godoc.org/k8s.io/api/core/v1#VolumeSource).
It allows you to mount existing PersistentVolumeClaims, ConfigMaps and Secrets inside the StatefulSet.
Also an `emptyDir` volume can be shared between initContainer and statefulSet.
Additionaly, you can provide a `SubPath` for volume mount (a file in a configMap source volume, for example).
You can also specify in which container the additional Volumes will be mounted with the `targetContainers` array option.
If `targetContainers` is empty, additional volumes will be mounted only in the `postgres` container.
If you set the `all` special item, it will be mounted in all containers (postgres + sidecars).
Else you can set the list of target containers in which the additional volumes will be mounted (eg : postgres, telegraf)
## Postgres parameters
Those parameters are grouped under the `postgresql` top-level key, which is