Add support for update_tasks

These work the same way as upgrade_tasks *but* they use a step variable
instead of tags, so we can iterate over a count/sequence which isn't
possibly via a wrapper playbook with tags (we may want to align upgrade
tasks with the same approach if this works out well).

Note the tasks can be run via ansible-playbook on the undercloud, like:

openstack overcloud config download --config-dir tmpconfig
cd tmpconfig/tripleo-HCrDA6-config
ansible-playbook -b -i /usr/bin/tripleo-ansible-inventory update_steps_playbook.yaml --limit controller

The above will do a rolling update for the Controller role (note the inconsistent
capitalization, we probably need to fix the group naming in tripleo-ansible-inventory)
because we specify serial: 1 in the playbook.

You can also trigger an update explicitly on one node like this, which is useful for debugging:

ansible-playbook -vvv -b -i /usr/bin/tripleo-ansible-inventory update_steps_playbook.yaml --limit overcloud-controller-0

Change-Id: I20bb3e26ab9d9cadf1a31fd304de8a014a901aa9

2 files changed, 29 insertions, 0 deletions

diff --git a/common/deploy-steps.j2 b/common/deploy-steps.j2
index 9cf4ead0..b798a67f 100644
--- a/common/deploy-steps.j2
+++ b/common/deploy-steps.j2
@@ -10,6 +10,7 @@
 {%- set primary_role_name = primary_role[0].name -%}
 # primary role is: {{primary_role_name}}
 {% set deploy_steps_max = 6 -%}
+{% set update_steps_max = 6 -%}
 
 heat_template_version: pike
 
@@ -319,4 +320,21 @@ outputs:
               with_sequence: count={{deploy_steps_max-1}}
               loop_control:
                 loop_var: step
+      update_steps_tasks: |
+{%- for role in roles %}
+            - include: {{role.name}}/update_tasks.yaml
+              when: role_name == '{{role.name}}'
+{%- endfor %}
+      update_steps_playbook: |
+        - hosts: overcloud
+          serial: 1
+          tasks:
+            - include: update_steps_tasks.yaml
+              with_sequence: count={{update_steps_max-1}}
+              loop_control:
+                loop_var: step
+            - include: deploy_steps_tasks.yaml
+              with_sequence: count={{deploy_steps_max-1}}
+              loop_control:
+                loop_var: step
 
diff --git a/common/services.yaml b/common/services.yaml
index 0bc3462f..a8186e43 100644
--- a/common/services.yaml
+++ b/common/services.yaml
@@ -193,6 +193,16 @@ resources:
           expression: coalesce($.data, []).where($ != null).select($.get('upgrade_tasks')).where($ != null).flatten().distinct()
           data: {get_attr: [ServiceChain, role_data]}
 
+  UpdateTasks:
+    type: OS::Heat::Value
+    properties:
+      type: comma_delimited_list
+      value:
+        yaql:
+          # Note we use distinct() here to filter any identical tasks, e.g yum update for all services
+          expression: coalesce($.data, []).where($ != null).select($.get('update_tasks')).where($ != null).flatten().distinct()
+          data: {get_attr: [ServiceChain, role_data]}
+
   UpgradeBatchTasks:
     type: OS::Heat::Value
     properties:
@@ -253,6 +263,7 @@ outputs:
       service_workflow_tasks: {get_attr: [ServiceWorkflowTasks, value]}
       step_config: {get_attr: [PuppetStepConfig, value]}
       upgrade_tasks: {get_attr: [UpgradeTasks, value]}
+      update_tasks: {get_attr: [UpdateTasks, value]}
       upgrade_batch_tasks: {get_attr: [UpgradeBatchTasks, value]}
       service_metadata_settings: {get_attr: [ServiceServerMetadataHook, metadata]}