Add serial execution to all playbooks

Since OSA aims to do HA, it's important to run at least one copy
of service at all times. Currently we do restart/run roles agaist all
hosts inside a group for most of the services. This cause
global service interruption if run without limit until service is
restarted. To avoid this from happening, we add serial execution
globally for all services with ability to override that behaviour.

Change-Id: I5f6b8f9de32124a363cfe2c6191a4971f528cd70

playbooks/etcd-install.yml

@@ -22,6 +22,7 @@
 - name: Install etcd server cluster
   hosts: etcd
   gather_facts: false
+  serial: "{{ etcd_serial | default(1) }}"
   user: root
   pre_tasks:
     - include_tasks: "common-tasks/os-{{ container_tech | default('lxc') }}-container-setup.yml"

playbooks/galera-install.yml

@@ -22,7 +22,7 @@
 - name: Install galera server
   hosts: galera_all
   gather_facts: false
-  serial: 1
+  serial: "{{ galera_serial | default(1) }}"
   user: root
   pre_tasks:
     - include_tasks: "common-tasks/os-{{ container_tech | default('lxc') }}-container-setup.yml"

playbooks/haproxy-install.yml

@@ -22,7 +22,7 @@
 - name: haproxy base config
   hosts: haproxy
   gather_facts: false
-  serial: "50%"
+  serial: "{{ haproxy_serial | default('50%') }}"
   user: root
   pre_tasks:
     - include_tasks: "common-tasks/os-{{ container_tech | default('lxc') }}-container-setup.yml"

playbooks/memcached-install.yml

@@ -22,6 +22,7 @@
 - name: Install memcached
   hosts: memcached
   gather_facts: false
+  serial: "{{ memcached_serial | default(['1','100%']) }}"
   user: root
   pre_tasks:
     - include_tasks: "common-tasks/os-{{ container_tech | default('lxc') }}-container-setup.yml"

playbooks/os-aodh-install.yml

@@ -22,6 +22,7 @@
 - name: Install the aodh components
   hosts: aodh_all
   gather_facts: false
+  serial: "{{ aodh_serial | default(['1','100%']) }}"
   user: root
   environment: "{{ deployment_environment_variables | default({}) }}"
   vars_files:

playbooks/os-barbican-install.yml

@@ -22,6 +22,7 @@
 - name: Installation and setup of barbican
   hosts: barbican_all
   gather_facts: false
+  serial: "{{ barbican_serial | default(['1','100%']) }}"
   user: root
   environment: "{{ deployment_environment_variables | default({}) }}"
   vars_files:

playbooks/os-blazar-install.yml

@@ -22,6 +22,7 @@
 - name: Install blazar components
   hosts: blazar_all
   gather_facts: false
+  serial: "{{ blazar_serial | default(['1','100%']) }}"
   environment: "{{ deployment_environment_variables | default({}) }}"
   user: root
   vars_files:

playbooks/os-ceilometer-install.yml

@@ -22,6 +22,7 @@
 - name: Install the ceilometer components
   hosts: ceilometer_all
   gather_facts: false
+  serial: "{{ ceilometer_serial | default(['1','100%']) }}"
   user: root
   vars_files:
     - "defaults/repo_packages/openstack_services.yml"

playbooks/os-designate-install.yml

@@ -25,6 +25,7 @@
 - name: Install designate server
   hosts: designate_all
   gather_facts: false
+  serial: "{{ designate_serial | default(['1','100%']) }}"
   user: root
   environment: "{{ deployment_environment_variables | default({}) }}"
   vars_files:

playbooks/os-gnocchi-install.yml

@@ -22,6 +22,7 @@
 - name: Install Gnocchi components
   hosts: gnocchi_all
   gather_facts: false
+  serial: "{{ gnocchi_serial | default(['1','100%']) }}"
   user: root
   environment: "{{ deployment_environment_variables | default({}) }}"
   vars_files:

playbooks/os-heat-install.yml

@@ -22,6 +22,7 @@
 - name: Install heat server
   hosts: heat_all
   gather_facts: false
+  serial: "{{ heat_serial | default(['1','100%']) }}"
   user: root
   environment: "{{ deployment_environment_variables | default({}) }}"
   tags:

playbooks/os-horizon-install.yml

@@ -22,6 +22,7 @@
 - name: Install horizon server
   hosts: horizon_all
   gather_facts: false
+  serial: "{{ horizon_serial | default(['1','100%']) }}"
   user: root
   environment: "{{ deployment_environment_variables | default({}) }}"
   vars_files:

playbooks/os-ironic-install.yml

@@ -22,6 +22,7 @@
 - name: Installation and setup of Ironic
   hosts: ironic_all
   gather_facts: false
+  serial: "{{ ironic_serial | default(['1','100%']) }}"
   user: root
   environment: "{{ deployment_environment_variables | default({}) }}"
   vars_files:

playbooks/os-magnum-install.yml

@@ -26,6 +26,7 @@
   hosts: magnum_all
   user: root
   gather_facts: false
+  serial: "{{ magnum_serial | default(['1','100%']) }}"
   environment: "{{ deployment_environment_variables | default({}) }}"
   vars_files:
     - "defaults/repo_packages/openstack_services.yml"

playbooks/os-manila-install.yml

@@ -19,6 +19,7 @@
 - name: Gather manila facts
   hosts: manila_all
   gather_facts: "{{ osa_gather_facts | default(True) }}"
+  serial: "{{ manila_serial | default(['1','100%']) }}"
   tags:
     - always
 

playbooks/os-masakari-install.yml

@@ -22,6 +22,7 @@
 - name: Setup corosync cluster
   hosts: masakari_monitor
   gather_facts: false
+  serial: "{{ masakari_monitor_serial | default('100%') }}"
   user: root
   vars:
     pacemaker_corosync_group: masakari_monitor
@@ -42,6 +43,7 @@
 - name: Install the masakari components
   hosts: masakari_all
   gather_facts: false
+  serial: "{{ masakari_api_serial | default(['1','100%']) }}"
   user: root
   vars_files:
     - "defaults/repo_packages/openstack_services.yml"

playbooks/os-mistral-install.yml

@@ -22,6 +22,7 @@
 - name: Install mistral components
   hosts: mistral_all
   gather_facts: false
+  serial: "{{ mistral_serial | default(['1','100%']) }}"
   environment: "{{ deployment_environment_variables | default({}) }}"
   user: root
   vars_files:

playbooks/os-murano-install.yml

@@ -22,6 +22,7 @@
 - name: Install murano components
   hosts: murano_all
   gather_facts: false
+  serial: "{{ murano_serial | default(['1','100%']) }}"
   environment: "{{ deployment_environment_variables | default({}) }}"
   user: root
   vars_files:

playbooks/os-octavia-install.yml

@@ -22,6 +22,7 @@
 - name: Install octavia server
   hosts: octavia_all
   gather_facts: false
+  serial: "{{ octavia_serial | default(['1','100%']) }}"
   user: root
   environment: "{{ deployment_environment_variables | default({}) }}"
   vars_files:

playbooks/os-placement-install.yml

@@ -22,6 +22,7 @@
 - name: Install placement components
   hosts: placement_all
   gather_facts: false
+  serial: "{{ placement_api_serial | default(['1','100%']) }}"
   environment: "{{ deployment_environment_variables | default({}) }}"
   user: root
   vars_files:

playbooks/os-sahara-install.yml

@@ -20,6 +20,7 @@
 - name: Install sahara server
   hosts: sahara_all
   gather_facts: "{{ osa_gather_facts | default(True) }}"
+  serial: "{{ sahara_serial | default(['1','100%']) }}"
   user: root
   environment: "{{ deployment_environment_variables | default({}) }}"
   vars_files:

playbooks/os-senlin-install.yml

@@ -22,6 +22,7 @@
 - name: Install senlin services
   hosts: senlin_all
   gather_facts: false
+  serial: "{{ senlin_serial | default(['1','100%']) }}"
   user: root
   environment: "{{ deployment_environment_variables | default({}) }}"
   vars_files:

playbooks/os-tacker-install.yml

@@ -22,6 +22,7 @@
 - name: Install the tacker components
   hosts: tacker_all
   gather_facts: false
+  serial: "{{ tacker_serial | default(['1','100%']) }}"
   user: root
   environment: "{{ deployment_environment_variables | default({}) }}"
   vars_files:

playbooks/os-trove-install.yml

@@ -25,6 +25,7 @@
 - name: Install trove server
   hosts: trove_all
   gather_facts: false
+  serial: "{{ trove_serial | default(['1','100%']) }}"
   user: root
   environment: "{{ deployment_environment_variables | default({}) }}"
   vars_files:

playbooks/os-zun-install.yml

@@ -22,6 +22,7 @@
 - name: Install the zun components
   hosts: zun_all
   gather_facts: false
+  serial: "{{ zun_serial | default(['1','100%']) }}"
   user: root
   vars_files:
     - "defaults/repo_packages/openstack_services.yml"

playbooks/qdrouterd-install.yml

@@ -21,7 +21,7 @@
 
 - name: Create and configure qdrouterd container
   hosts: "{{ qdrouterd_host_group | default('qdrouterd_all') }}"
-  serial: 1
+  serial: "{{ qdrouterd_serial | default(1) }}"
   gather_facts: false
   user: root
   environment: "{{ deployment_environment_variables | default({}) }}"

playbooks/rabbitmq-install.yml

@@ -21,7 +21,7 @@
 
 - name: Create and configure rabbitmq container
   hosts: "{{ rabbitmq_host_group | default('rabbitmq_all') }}"
-  serial: 1
+  serial: "{{ rabbitmq_serial | default('20%') }}"
   gather_facts: false
   user: root
   pre_tasks:
@@ -56,7 +56,7 @@
 - name: Install rabbitmq server
   hosts: "{{ rabbitmq_host_group | default('rabbitmq_all') }}"
   gather_facts: false
-  serial: 20%
+  serial: "{{ rabbitmq_serial | default('20%') }}"
   user: root
   roles:
     - role: "rabbitmq_server"

playbooks/repo-install.yml

@@ -22,6 +22,7 @@
 - name: Setup repo servers
   hosts: repo_all
   gather_facts: false
+  serial: "{{ repo_serial | default(['1','100%']) }}"
   user: root
   pre_tasks:
     - name: End playbook

playbooks/unbound-install.yml

@@ -22,6 +22,7 @@
 - name: Install unbound DNS resolvers
   hosts: unbound
   gather_facts: false
+  serial: "{{ unbound_serial | default(['1','100%']) }}"
   user: root
   pre_tasks:
     - include_tasks: common-tasks/os-log-dir-setup.yml

playbooks/utility-install.yml

@@ -23,6 +23,7 @@
   hosts: utility_all
   user: root
   gather_facts: false
+  serial: "{{ utility_serial | default(['1','100%']) }}"
   environment: "{{ deployment_environment_variables | default({}) }}"
   vars_files:
     - "defaults/repo_packages/openstack_services.yml"