Enable setting a list of image_pull_secrets (#860)

When there are e.g. multiple authenticated container registries used
we need to be able to add multiple imagePullSecrets to the k8s resource

Co-authored-by: Maximilian Meister <maximilian.meister@pm.me>

roles/installer/defaults/main.yml

@@ -133,7 +133,7 @@ _postgres_image_version: 12
 _init_container_image: quay.io/centos/centos
 _init_container_image_version: stream8
 image_pull_policy: IfNotPresent
-image_pull_secret: ''
+image_pull_secrets: []
 
 # Extra commands which will be appended to the initContainer
 # Make sure that each command entered return an exit code 0

roles/installer/templates/deployment.yaml.j2

@@ -33,9 +33,14 @@ spec:
 {% endif %}
     spec:
       serviceAccountName: '{{ ansible_operator_meta.name }}'
-{% if image_pull_secret %}
+{% if image_pull_secret is defined %}
       imagePullSecrets:
         - name: {{ image_pull_secret }}
+{% elif image_pull_secrets | length > 0 %}
+      imagePullSecrets:
+{% for secret in image_pull_secrets %}
+        - name: {{ secret }}
+{% endfor %}
 {% endif %}
       initContainers:
 {% if bundle_ca_crt or projects_persistence|bool or init_container_extra_commands %}

roles/installer/templates/postgres.yaml.j2

@@ -33,9 +33,14 @@ spec:
         app.kubernetes.io/part-of: '{{ ansible_operator_meta.name }}'
         app.kubernetes.io/managed-by: '{{ deployment_type }}-operator' 
     spec:
-{% if image_pull_secret %}
+{% if image_pull_secret is defined %}
       imagePullSecrets:
         - name: {{ image_pull_secret }}
+{% elif image_pull_secrets | length > 0 %}
+      imagePullSecrets:
+{% for secret in image_pull_secrets %}
+        - name: {{ secret }}
+{% endfor %}
 {% endif %}
       initContainers:
         - name: database-check