Fix the ssh issue from compute nodes to deployer during remove comput…

…e node.

Issue: QE hit this issue in remove compute. when compute host is trying to ssh to deployer.
Error: compute node trying to ssh to deployer
"msg": "Failed to connect to the host via ssh:

doc/source/operations.rst

@@ -106,6 +106,8 @@ directory:
 
 .. note::
 
+   NODE_HOSTNAME must be same as host name in ansible inventory.
+
    Compute nodes must be removed individually. When the node has been successfully
    removed, the host details must be manually removed from
    "airship-openstack-compute-workers" group in the inventory.

playbooks/generic-clean_airship.yml

@@ -13,12 +13,17 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations
 # under the License.
-#
-- hosts: airship-openstack-compute-workers
+
+- hosts: soc-deployer
   gather_facts: no
   any_errors_fatal: true
-  roles:
-    - { role: openstack-remove-compute, compute_node_name: "{{ inventory_hostname }}" }
+  tasks:
+    - name: Remove compute nodes.
+      include_role:
+         name: openstack-remove-compute
+      loop: "{{ groups['airship-openstack-compute-workers'] }}"
+      loop_control:
+         loop_var: compute_node_name
 
 - hosts: soc-deployer
   gather_facts: no

playbooks/remove_compute.yml

@@ -1,5 +1,5 @@
 ---
-- hosts: airship-openstack-compute-workers
+- hosts: soc-deployer
   gather_facts: yes
   any_errors_fatal: true
   roles:

playbooks/roles/openstack-remove-compute/tasks/main.yml

@@ -6,47 +6,42 @@
   environment:
     OS_CLOUD: openstack
   register: compute_id
-  delegate_to: "{{ groups['soc-deployer'][0] }}"
   failed_when: false
   changed_when: false
 
 - name: Validate compute node id.
   debug:
     msg: "Compute node {{ compute_node_name }} does not exists in openstack."
-  when: compute_id.stdout | length | int == 0
+  when: compute_id is defined and compute_id.stdout | length | int == 0
 
 - name: Get VM list from compute node.
   command: "openstack server list --host {{ compute_node_name }}"
   environment:
     OS_CLOUD: openstack
   register: vm_exist
-  delegate_to: "{{ groups['soc-deployer'][0] }}"
   failed_when: false
   changed_when: false
 
 - name: Validate VM(s) exists on compute node.
   fail:
     msg: "VM(s) exists on compute node {{ compute_node_name }}."
-  when: vm_exist.stdout | length | int != 0
+  when: vm_exist is defined and vm_exist.stdout | length | int != 0
 
 - name: Check for control-plane label.
   shell: |
      set -o pipefail
      kubectl get node {{ compute_node_name }} --show-labels | grep openstack-control-plane=enabled
   register: node_label_result
-  delegate_to: "{{ groups['soc-deployer'][0] }}"
   failed_when: false
   changed_when: false
 
 - name: Remove openstack-compute-node label from compute node
   command: "kubectl label node {{ compute_node_name }} openstack-compute-node-"
-  delegate_to: "{{ groups['soc-deployer'][0] }}"
   changed_when: false
 
 - name: Remove openvswitch label from compute node.
   command: "kubectl label node {{ compute_node_name }} openvswitch-"
-  delegate_to: "{{ groups['soc-deployer'][0] }}"
-  when: node_label_result.stdout | length | int == 0
+  when: node_label_result is defined and node_label_result.stdout | length | int == 0
 
 - name: Wait for compute pods to terminate
   shell: |
@@ -56,24 +51,22 @@
   until: nova_pod_name.stdout | length | int == 0
   retries: 30
   delay: 10
-  delegate_to: "{{ groups['soc-deployer'][0] }}"
   failed_when: false
   changed_when: false
 
 - name: Delete openstack compute service.
   command: "openstack compute service delete {{ compute_id.stdout }}"
   environment:
     OS_CLOUD: openstack
-  delegate_to: "{{ groups['soc-deployer'][0] }}"
-  when: compute_id.stdout | length | int != 0
+  when: compute_id is defined and compute_id.stdout | length | int != 0
   failed_when: false
 
 - name: Delete subvolumes from compute node.
   import_role:
     name: airship-configure-worker
     tasks_from: subvolumes-setup.yml
   delegate_to: '{{ compute_node_name }}'
+  when: compute_node_name in groups['airship-openstack-compute-workers']
   vars:
     clean_compute: "delete_subvolume"
-    clean_control_node: '{{ node_label_result.stdout }}'
-
+    clean_control_node: '{{ node_label_result.stdout | default("") }}'