Allows use of Mistral workflows during deployment steps

Introduces a general mechanism meant to allow for the execution
of workflows during the deployment steps.

Services can define workflow actions to be triggered during a step
in the newly added service_workflow_tasks section. The syntax is:

  service_workflow_tasks:
    step2:
      - name: my_action_name
        action: std.echo
        input:
          output: 'hello world'

Implements: blueprint tripleo-ceph-ansible
Depends-On: If02799e7457ca017cc119317dfb2db7198a3559f
Depends-On: Ibc5707f9f06266fe84ad1dd91dcb984157871d30
Change-Id: I36a642fbc2076ad9e4a10ffc56d6d16f3ed6f27a

1 files changed, 71 insertions, 5 deletions

diff --git a/puppet/puppet-steps.j2 b/puppet/puppet-steps.j2
index 5567d65d..cc681fd3 100644
--- a/puppet/puppet-steps.j2
+++ b/puppet/puppet-steps.j2
@@ -1,3 +1,19 @@
+{% set deploy_steps_max = 6 %}
+
+conditions:
+{% for step in range(1, deploy_steps_max) %}
+  WorkflowTasks_Step{{step}}_Enabled:
+    or:
+    {% for role in roles %}
+      - not:
+          equals:
+            - get_param: [role_data, {{role.name}}, service_workflow_tasks, step{{step}}]
+            - ''
+      - False
+    {% endfor %}
+{% endfor %}
+
+resources:
   # Post deployment steps for all roles
   # A single config is re-applied with an incrementing step number
 {% for role in roles %}
@@ -24,17 +40,26 @@
       StepConfig: {list_join: ["\n", {get_param: [role_data, {{role.name}}, step_config]}]}
 
   # Step through a series of configuration steps
-{% for step in range(1, 6) %}
+{% for step in range(1, deploy_steps_max) %}
   {{role.name}}Deployment_Step{{step}}:
     type: OS::Heat::StructuredDeploymentGroup
-  {% if step == 1 %}
-    depends_on: [{{role.name}}PreConfig, {{role.name}}ArtifactsDeploy]
-  {% else %}
     depends_on:
+      - WorkflowTasks_Step{{step}}_Execution
+    # TODO(gfidente): the following if/else condition
+    # replicates what is already defined for the
+    # WorkflowTasks_StepX resource and can be remove
+    # if https://bugs.launchpad.net/heat/+bug/1700569
+    # is fixed.
+    {% if step == 1 %}
+    {% for dep in roles %}
+      - {{dep.name}}PreConfig
+      - {{dep.name}}ArtifactsDeploy
+    {% endfor %}
+    {% else %}
     {% for dep in roles %}
       - {{dep.name}}Deployment_Step{{step -1}}
     {% endfor %}
-  {% endif %}
+    {% endif %}
     properties:
       name: {{role.name}}Deployment_Step{{step}}
       servers: {get_param: [servers, {{role.name}}]}
@@ -72,3 +97,44 @@
 
 
 {% endfor %}
+
+# BEGIN service_workflow_tasks handling
+{% for step in range(1, deploy_steps_max) %}
+  WorkflowTasks_Step{{step}}:
+    type: OS::Mistral::Workflow
+    condition: WorkflowTasks_Step{{step}}_Enabled
+    depends_on:
+    {% if step == 1 %}
+    {% for dep in roles %}
+      - {{dep.name}}PreConfig
+      - {{dep.name}}ArtifactsDeploy
+    {% endfor %}
+    {% else %}
+    {% for dep in roles %}
+      - {{dep.name}}Deployment_Step{{step -1}}
+    {% endfor %}
+    {% endif %}
+    properties:
+      name: {list_join: [".", ["tripleo", {get_param: stack_name}, "workflowtasks", "step{{step}}"]]}
+      type: direct
+      tasks:
+        yaql:
+          expression: $.data.where($ != '').select($.get('step{{step}}')).where($ != null).flatten()
+          data:
+          {% for role in roles %}
+            - get_param: [role_data, {{role.name}}, service_workflow_tasks]
+          {% endfor %}
+
+  WorkflowTasks_Step{{step}}_Execution:
+    type: OS::Mistral::ExternalResource
+    condition: WorkflowTasks_Step{{step}}_Enabled
+    depends_on: WorkflowTasks_Step{{step}}
+    properties:
+      actions:
+        CREATE:
+          workflow: { get_resource: WorkflowTasks_Step{{step}} }
+        UPDATE:
+          workflow: { get_resource: WorkflowTasks_Step{{step}} }
+      always_update: true
+{% endfor %}
+# END service_workflow_tasks handling