Deploy operands in the operator's namespace

[alebedev87]

Operand can be deployed in the operator namespace:

$ oc -n external-dns-operator get pods
NAME                                     READY   STATUS    RESTARTS   AGE
external-dns-operator-6644944b64-2txst   2/2     Running   0          2m12s

$ oc get ns external-dns
Error from server (NotFound): namespaces "external-dns" not found

$ oc apply -f infoblox-cr.yaml 
externaldns.externaldns.olm.openshift.io/sample-infoblox created

$ oc -n external-dns-operator get pods
NAME                                            READY   STATUS    RESTARTS   AGE
external-dns-operator-6644944b64-2txst          2/2     Running   0          3m40s
external-dns-sample-infoblox-57f97c7849-q2rp9   1/1     Running   0          59s

$ oc get externaldns 
NAME              AGE
sample-infoblox   68s

$ oc -n external-dns-operator logs external-dns-sample-infoblox-57f97c7849-q2rp9
...
time="2022-04-11T20:55:57Z" level=info msg="Created OpenShift client https://10.217.4.1:443"
time="2022-04-11T20:56:08Z" level=debug msg="fetched 0 records from infoblox"
...
time="2022-04-11T20:56:08Z" level=info msg="All records are already up to date"

Removal of the CR and the operator namespace works with no problem:

$ oc delete externaldns sample-infoblox
externaldns.externaldns.olm.openshift.io "sample-infoblox" deleted

$ oc -n external-dns-operator get pods
NAME                                     READY   STATUS    RESTARTS   AGE
external-dns-operator-6644944b64-2txst   2/2     Running   0          8m24s

$ oc delete ns external-dns-operator
namespace "external-dns-operator" deleted

$ oc get ns external-dns-operator
Error from server (NotFound): namespaces "external-dns-operator" not found

Even if there is a CR and an operand the namespace can be removed - no problem:

$ oc -n external-dns-operator get pods
NAME                                            READY   STATUS    RESTARTS   AGE
external-dns-operator-6cf8d8576d-r9drk          2/2     Running   0          34s
external-dns-sample-infoblox-57f97c7849-rztbw   1/1     Running   0          11s

$ oc get externaldns
NAME              AGE
sample-infoblox   18s

$ oc delete ns external-dns-operator
namespace "external-dns-operator" deleted

$ oc get externaldns
NAME              AGE
sample-infoblox   41s

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alebedev87

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/openshift/external-dns-operator/blob/main/OWNERS)~~ [alebedev87] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[alebedev87]

/assign @quarterpin I tested this change manually (see the description), the e2e tests are passed too. However this is a major design change and needs to be tested thoroughly.

[alebedev87]

/hold migration doc is to be added, no need to spawn test clusters

[alebedev87]

/unhold as it doesn't stop the tests :(

[alebedev87]

/assign @sherine-k

[alebedev87]

/retest

[quarterpin]

/label qe-approved

[sherine-k]

/lgtm

[openshift-bot]

/retest-required

Please review the full test history for this PR and help us cut down flakes.

[sherine-k]

/lgtm

[openshift-ci[bot]]

@alebedev87: all tests passed!

Full PR test history. Your PR dashboard.

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[alebedev87]

/label docs-approved /label px-approved