Openebs: Support for running maya-apiserver & openebs-provisioner in custom namespace

[metalmatze]

Is this a BUG REPORT or FEATURE REQUEST?

This is a FEATURE REQUEST

What happened:
Right now OpenEBS can only be deployed to the default namespace.

What you expected to happen:
I want to deploy the operator to custom namespaces for example openebs or kube-system.

How to reproduce it (as minimally and precisely as possible):

Just deploy the operator to a non-default namespace? Change all the namespaces in k8s/openebs-operator.yaml to openebs.
This will put the provisioner in a CrashLoopBackOff and the logs show:

E0206 18:09:03.238356       1 openebs-provisioner.go:69] Error getting maya-apiserver IP Address: services "maya-apiserver-service" not found

Anything else we need to know?:
In Kubernetes it is pretty common to run services in their own namespace. Looking at OpenEBS, I feel like running the maya-apiserver & openebs-provisioner in the default namespace is strange.
Right now I'd like to run these in an own openebs namespace or perhaps in kube-system too.

As discussed on Slack I now open an issue.
@tboerger @yudaykiran

[kmova]

With 0.5.1, the support for deploying openebs in custom namespace (other than default) and then launching an app in a different namespace is supported. To deploy openebs in its own namespace (say openebs) the following changes need to be done to the openebs-operator.yaml:

(1) Create a name space:

apiVersion: v1
kind: Namespace
metadata:
  name: openebs

(2) Change the references in openebs-operator.yaml to namespace: default to namespace: openebs (or anything else used in the step1 above).

(3) In the openebs-provisioner deployment, add the following ENV:

        - name: OPENEBS_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace

[kmova]

The modified openebs-operator:

• https://github.com/kmova/bootstrap/blob/master/openebs-yamls/openebs-operator-ns-openebs.yaml

The sample percona yaml used to test percona in its namespace:

• https://github.com/kmova/bootstrap/blob/master/openebs-yamls/percona-ns-percona-sc-percona.yaml

The above yamls use 0.5.2-RC1 (since i was currently testing them, but the non-default namespace works with 0.5.1 as well).

[kmova]

The above details are added to the documentation.

https://docs.openebs.io/docs/namespace.html