Add usages for step_type field

Before this patch step_type of provision step was useless,
now we can use this field to describe step better.

partially implements bp: event-log

Change-Id: Id50aa16c8f383c573cc41d503716157eea9f9fc8

sahara/context.py

@@ -274,16 +274,23 @@ def sleep(seconds=0):
 
 class InstanceInfo(object):
     def __init__(self, cluster_id=None, instance_id=None, instance_name=None,
-                 node_group_id=None):
+                 node_group_id=None, step_type=None):
         self.cluster_id = cluster_id
         self.instance_id = instance_id
         self.instance_name = instance_name
         self.node_group_id = node_group_id
+        self.step_type = step_type
+
+
+def set_step_type(step_type):
+    current().current_instance_info.step_type = step_type
 
 
 class InstanceInfoManager(object):
     def __init__(self, instance_info):
         self.prev_instance_info = current().current_instance_info
+        if not instance_info.step_type:
+            instance_info.step_type = self.prev_instance_info.step_type
         current().current_instance_info = instance_info
 
     def __enter__(self):

sahara/service/ops.py

@@ -206,6 +206,7 @@ def ops_error_handler(description):
 
 
 def _rollback_cluster(cluster, reason):
+    context.set_step_type(_("Engine: rollback cluster"))
     return INFRA.rollback_cluster(cluster, reason)
 
 
@@ -250,14 +251,17 @@ def _provision_cluster(cluster_id):
 
     # creating instances and configuring them
     cluster = conductor.cluster_get(ctx, cluster_id)
+    context.set_step_type(_("Engine: create cluster"))
     INFRA.create_cluster(cluster)
 
     # configure cluster
     cluster = g.change_cluster_status(cluster, "Configuring")
+    context.set_step_type(_("Plugin: configure cluster"))
     plugin.configure_cluster(cluster)
 
     # starting prepared and configured cluster
     cluster = g.change_cluster_status(cluster, "Starting")
+    context.set_step_type(_("Plugin: start cluster"))
     plugin.start_cluster(cluster)
 
     # cluster is now up and ready
@@ -285,17 +289,19 @@ def _provision_scaled_cluster(cluster_id, node_group_id_map):
                                                         node_group.count]
 
     if instances_to_delete:
+        context.set_step_type(_("Plugin: decommission cluster"))
         plugin.decommission_nodes(cluster, instances_to_delete)
 
     # Scaling infrastructure
     cluster = g.change_cluster_status(cluster, "Scaling")
-
+    context.set_step_type(_("Engine: scale cluster"))
     instance_ids = INFRA.scale_cluster(cluster, node_group_id_map)
 
     # Setting up new nodes with the plugin
     if instance_ids:
         cluster = g.change_cluster_status(cluster, "Configuring")
         instances = g.get_instances(cluster, instance_ids)
+        context.set_step_type(_("Plugin: scale cluster"))
         plugin.scale_cluster(cluster, instances)
 
     g.change_cluster_status(cluster, "Active")
@@ -308,8 +314,10 @@ def terminate_cluster(cluster_id):
     cluster = conductor.cluster_get(ctx, cluster_id)
     plugin = plugin_base.PLUGINS.get_plugin(cluster.plugin_name)
 
+    context.set_step_type(_("Plugin: shutdown cluster"))
     plugin.on_terminate_cluster(cluster)
 
+    context.set_step_type(_("Engine: shutdown cluster"))
     INFRA.shutdown_cluster(cluster)
 
     if CONF.use_identity_api_v3:

sahara/utils/cluster_progress_ops.py

@@ -73,12 +73,15 @@ def add_provisioning_step(cluster_id, step_name, total):
         return
 
     update_provisioning_steps(cluster_id)
-    return conductor.cluster_provision_step_add(context.ctx(), cluster_id, {
-        'step_name': step_name,
-        'completed': 0,
-        'total': total,
-        'started_at': timeutils.utcnow(),
-    })
+    step_type = context.ctx().current_instance_info.step_type
+    return conductor.cluster_provision_step_add(
+        context.ctx(), cluster_id, {
+            'step_name': step_name,
+            'step_type': step_type,
+            'completed': 0,
+            'total': total,
+            'started_at': timeutils.utcnow(),
+        })
 
 
 def get_current_provisioning_step(cluster_id):