Bug 1856973

+++ This bug was initially created as a clone of Bug #1856814 +++

Description of problem:


Version-Release number of selected component (if applicable):
1.2.3

Actual results:
It takes a lot of work to get something like the list of namespaces for the plan when running a hook.

Expected results:
We should at least add the plan name as an env var so it can be looked up, if not also adding env vars for common resources like namespaces, and so on.

It shouldn't require doing something like below. And this is the easier case of your hook running on the controller cluster. If it's on the other cluster where the mig* resources don't exist it will be even more difficult.

Additional info:
To get namespaces looks like:
- hosts: localhost
  gather_facts: false
  tasks:
  - k8s_facts:
      kind: pods
      api: v1
      namespace: openshift-migration
      name: "{{ lookup( 'env', 'HOSTNAME') }}"
    register: pods
 
  - k8s_facts:
      kind: jobs
      api: batch/v1
      namespace: openshift-migration
      name: "{{ pods.resources[0].metadata.ownerReferences[0].name }}"
    register: jobs
 
  - k8s_facts:
      kind: jobs
      api: batch/v1
      namespace: openshift-migration
      name: "{{ pods.resources[0].metadata.ownerReferences[0].name }}"
    register: jobs
 
  - k8s_facts:
      kind: migmigration
      api: migration.openshift.io/v1alpha1
      namespace: openshift-migration
    register: migrations
 
  - set_fact:
      migmigration: "{{ item.metadata }}"
    with_items: "{{ migrations.resources }}"
    when: item.metadata.uid == jobs.resources[0].metadata.labels.owner
 
  - k8s_facts:
      kind: migplan
      api: migration.openshift.io/v1alpha1
      namespace: openshift-migration
      name: "{{ migmigration.ownerReferences[0].name }}"
    register: migplans
 
  - set_fact:
      namespaces: "{{ migplans.resources[0].spec.namespaces }}"
 
  - debug:
      msg: "{{ namespaces }}"

--- Additional comment from Jason Montleon on 2020-07-14 16:58:30 UTC ---

With https://github.com/konveyor/mig-controller/pull/587 the same can be achieved with:

- hosts: localhost
  gather_facts: false
  tasks:
  - debug:
      msg: "{{ (lookup( 'env', 'MIGRATION_NAMESPACES')).split(',') }}"