Optimize pod logs and cluster object description gathering

Don't gather logs for unavailable cluster that is always the case for
ephemeral cluster in successful deployments. Cheap ~5 mins on each
deployment.

Change-Id: I32f84e9dadbad11fe92337cd0dc04870d1a0ff3e
Signed-off-by: Andrii Ostapenko <andrii.ostapenko@att.com>

roles/airship-gather-pod-logs/tasks/filter-contexts.yaml

@@ -0,0 +1,28 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
+- name: "Try to reach {{ ctx_name }} cluster"
+  shell: |-
+    kubectl --kubeconfig {{ kubeconfig }} --context {{ ctx_name }} get ns
+  register: reachable
+  ignore_errors: true
+
+- debug:
+    msg: "{{ ctx_name }} is not reachable and won't be used for pod logs gathering"
+  when: reachable.rc != 0
+
+- name: "Add {{ ctx_name }} to context list"
+  when: reachable.rc == 0
+  set_fact:
+      kctl_context_list: "{{ kctl_context_list | default([]) + [ ctx_name ] }}"
+...

roles/airship-gather-pod-logs/tasks/get-contexts.yaml

@@ -10,11 +10,15 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+---
 - name: "Save kubeconfig contexts"
   shell: |-
     kubectl --kubeconfig {{ kubeconfig }} config get-contexts -o name
   register: kctl_context_command
 
-  - name: "Save kubeconfig contexts to list"
-    set_fact:
-      kctl_context_list: "{{ kctl_context_command.stdout.split('\n') }}"
+- name: "Save contexts for reachable clusters"
+  with_items: "{{ kctl_context_command.stdout.split('\n') }}"
+  loop_control:
+      loop_var: ctx_name
+  include_tasks: filter-contexts.yaml
+...

roles/describe-kubernetes-objects/tasks/filter-contexts.yaml

@@ -0,0 +1,28 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+---
+- name: "Try to reach {{ ctx_name }} cluster"
+  shell: |-
+    kubectl --kubeconfig {{ kubeconfig }} --context {{ ctx_name }} get ns
+  register: reachable
+  ignore_errors: true
+
+- debug:
+    msg: "{{ ctx_name }} is not reachable and won't be used for object desctiption gathering"
+  when: reachable.rc != 0
+
+- name: "Add {{ ctx_name }} to context list"
+  when: reachable.rc == 0
+  set_fact:
+      kctl_context_list: "{{ kctl_context_list | default([]) + [ ctx_name ] }}"
+...

roles/describe-kubernetes-objects/tasks/get-contexts.yaml

@@ -16,7 +16,9 @@
     kubectl --kubeconfig {{ kubeconfig }} config get-contexts -o name
   register: kctl_context_command
 
-- name: "Save kubeconfig contexts to list"
-  set_fact:
-    kctl_context_list: "{{ kctl_context_command.stdout.split('\n') }}"
+- name: "Save contexts for reachable clusters"
+  with_items: "{{ kctl_context_command.stdout.split('\n') }}"
+  loop_control:
+      loop_var: ctx_name
+  include_tasks: filter-contexts.yaml
 ...