Use dictionary for service group mappings

Change the 'nova_service_names' from a list to a dictionary mapping
of services, groups that install those services. This brings the
method into line with that used in the os_neutron role in order to
implement a more standardised method.

The init tasks have been updated to run once and loop through this
mapping rather than being included multiple times and re-run against
each host. This may potentially reduce role run times.

Currently the reload of upstart/systemd scripts may not happen if
only one script changes as the task uses a loop with only one result
register. This patch implements handlers to reload upstart/systemd
scripts to ensure that this happens when any one of the scripts
change.

The handler to reload the services now only tries to restart the
service if the host is in the group for the service according to the
service group mapping. This allows us to ensure that handler
failures are no longer ignored and that no execution time is wasted
trying to restart services which do not exist on the host.

Finally:
- Common variables shared by each service's template files have
  been updated to use the service namespaced variables.
- Unused handlers have been removed.
- Unused variables have been removed.

Change-Id: I53fb0ab1cc5762e3559d4ee2635d4cca532df7e3

defaults/main.yml

@@ -189,7 +189,6 @@ nova_service_adminuri: "{{ nova_service_adminuri_proto }}://{{ internal_lb_vip_a
 nova_service_adminurl: "{{ nova_service_adminuri }}/v2.1/%(tenant_id)s"
 nova_service_internaluri: "{{ nova_service_internaluri_proto }}://{{ internal_lb_vip_address }}:{{ nova_service_port }}"
 nova_service_internalurl: "{{ nova_service_internaluri }}/v2.1/%(tenant_id)s"
-nova_program_name: nova-api-os-compute
 
 ## Nova cinder
 nova_cross_az_attach: True
@@ -201,7 +200,6 @@ nova_spice_html5proxy_base_uri: "{{ nova_spice_html5proxy_base_proto }}://{{ ext
 nova_spice_html5proxy_base_url: "{{ nova_spice_html5proxy_base_uri }}/spice_auto.html"
 nova_spice_console_keymap: en-us
 nova_spice_console_agent_enabled: True
-nova_spice_program_name: nova-spicehtml5proxy
 nova_spicehtml5_git_repo: https://github.com/SPICE/spice-html5
 nova_spicehtml5_git_install_branch: master
 
@@ -213,7 +211,6 @@ nova_novncproxy_base_url: "{{ nova_novncproxy_base_uri }}/vnc_auto.html"
 nova_novncproxy_vncserver_proxyclient_address: "{{ ansible_host }}"
 nova_novncproxy_vncserver_listen: "{{ ansible_host }}"
 nova_novncproxy_agent_enabled: True
-nova_novncproxy_program_name: nova-novncproxy
 nova_novncproxy_git_repo: https://github.com/kanaka/novnc
 nova_novncproxy_git_install_branch: master
 nova_novncproxy_vnc_keymap: en-us
@@ -222,14 +219,9 @@ nova_novncproxy_vnc_keymap: en-us
 nova_metadata_proxy_enabled: "{{ nova_network_services[nova_network_type]['metadata_proxy_enabled'] | bool }}"
 nova_metadata_host: "{{ internal_lb_vip_address }}"
 nova_metadata_port: 8775
-nova_metadata_program_name: nova-api-metadata
-
-## Nova cert
-nova_cert_program_name: nova-cert
 
 ## Nova compute
 nova_enable_instance_password: True
-nova_compute_program_name: nova-compute
 nova_force_config_drive: False
 
 
@@ -242,12 +234,8 @@ nova_libvirt_inject_password: False
 nova_libvirt_disk_cachemodes: '{{ nova_libvirt_images_rbd_pool is defined | ternary("network=writeback", "") }}'
 nova_libvirt_hw_disk_discard: '{{ nova_libvirt_images_rbd_pool is defined | ternary("unmap", "ignore") }}'
 
-## Nova conductor
-nova_conductor_program_name: nova-conductor
-
 ## Nova console
 nova_console_agent_enabled: True
-nova_consoleauth_program_name: nova-consoleauth
 nova_console_keymap: en-us
 # Set the console type. Presently the only options are ["spice", "novnc"].
 nova_console_type: spice
@@ -325,7 +313,6 @@ nova_scheduler_default_filters: "RetryFilter,AvailabilityZoneFilter,RamFilter,Co
 nova_scheduler_driver: filter_scheduler
 nova_scheduler_available_filters: nova.scheduler.filters.all_filters
 nova_scheduler_weight_classes: nova.scheduler.weights.all_weighers
-nova_scheduler_program_name: nova-scheduler
 
 # If you want to regenerate the nova users SSH keys, on each run, set this var to True
 # Otherwise keys will be generated on the first run and not regenerated each run.
@@ -372,17 +359,38 @@ nova_libvirtd_listen_tcp: 0
 nova_libvirtd_auth_tcp: sasl
 nova_libvirtd_debug_log_filters: "3:remote 4:event 3:json 3:rpc"
 
-## Service Names
-nova_service_names:
-  - "{{ nova_metadata_program_name }}"
-  - "{{ nova_cert_program_name }}"
-  - "{{ nova_conductor_program_name }}"
-  - "{{ nova_program_name }}"
-  - "{{ nova_scheduler_program_name }}"
-  - "{{ nova_compute_program_name }}"
-  - "{{ nova_spice_program_name }}"
-  - "{{ nova_consoleauth_program_name }}"
-  - "{{ nova_novncproxy_program_name }}"
+## Service Name-Group Mapping
+nova_services:
+  nova-api-metadata:
+    group: nova_api_metadata
+    service_name: nova-api-metadata
+  nova-api-os-compute:
+    group: nova_api_os_compute
+    service_name: nova-api-os-compute
+  nova-cert:
+    group: nova_cert
+    service_name: nova-cert
+  nova-compute:
+    group: nova_compute
+    service_name: nova-compute
+  nova-conductor:
+    group: nova_conductor
+    service_name: nova-conductor
+  nova-consoleauth:
+    group: nova_console
+    service_name: nova-consoleauth
+  nova-novncproxy:
+    group: nova_console
+    service_name: nova-novncproxy
+    condition: "{{ nova_console_type == 'novnc' }}"
+  nova-scheduler:
+    group: nova_scheduler
+    service_name: nova-scheduler
+  nova-spicehtml5proxy:
+    group: nova_console
+    service_name: nova-spicehtml5proxy
+    condition: "{{ nova_console_type == 'spice' }}"
+
 
 nova_novnc_pip_packages:
   - websockify

handlers/main.yml

@@ -1,5 +1,5 @@
 ---
-# Copyright 2014, Rackspace US, Inc.
+# Copyright 2015, Rackspace US, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -19,10 +19,23 @@
     state: "restarted"
     pattern: "libvirt-bin"
 
+- name: Reload systemd daemon
+  command: "systemctl daemon-reload"
+  notify:
+    - Restart nova services
+
+- name: Reload upstart init scripts
+  shell: |
+    initctl reload-configuration
+  notify:
+    - Restart nova services
+
 - name: Restart nova services
   service:
-    name: "{{ item }}"
-    state: restarted
-    pattern: "{{ item }}"
-  with_items: "{{ nova_service_names }}"
-  failed_when: false
+    name: "{{ item.value.service_name }}"
+    state: "restarted"
+    pattern: "{{ item.value.service_name }}"
+  with_dict: "{{ nova_services }}"
+  when:
+    - inventory_hostname in groups[item.value.group]
+    - "{{ item.value.condition | default(true) }}"

tasks/main.yml

@@ -54,7 +54,7 @@
 - include: nova_pre_install.yml
 - include: nova_install.yml
 - include: nova_post_install.yml
-- include: nova_init.yml
+- include: nova_init_common.yml
 
 - include: nova_db_setup.yml
   when: inventory_hostname == groups['nova_api_os_compute'][0]

tasks/nova_init.yml

@@ -1,101 +0,0 @@
----
-# Copyright 2014, Rackspace US, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-- include: nova_init_common.yml
-  vars:
-    program_name: "{{ nova_metadata_program_name }}"
-    service_name: "{{ nova_service_name }}"
-    system_user: "{{ nova_system_user_name }}"
-    system_group: "{{ nova_system_group_name }}"
-    service_home: "{{ nova_system_home_folder }}"
-  when: inventory_hostname in groups['nova_api_metadata']
-
-- include: nova_init_common.yml
-  vars:
-    program_name: "{{ nova_cert_program_name }}"
-    service_name: "{{ nova_service_name }}"
-    system_user: "{{ nova_system_user_name }}"
-    system_group: "{{ nova_system_group_name }}"
-    service_home: "{{ nova_system_home_folder }}"
-  when: inventory_hostname in groups['nova_cert']
-
-- include: nova_init_common.yml
-  vars:
-    program_name: "{{ nova_conductor_program_name }}"
-    service_name: "{{ nova_service_name }}"
-    system_user: "{{ nova_system_user_name }}"
-    system_group: "{{ nova_system_group_name }}"
-    service_home: "{{ nova_system_home_folder }}"
-  when: inventory_hostname in groups['nova_conductor']
-
-- include: nova_init_common.yml
-  vars:
-    program_name: "{{ nova_program_name }}"
-    service_name: "{{ nova_service_name }}"
-    system_user: "{{ nova_system_user_name }}"
-    system_group: "{{ nova_system_group_name }}"
-    service_home: "{{ nova_system_home_folder }}"
-  when: inventory_hostname in groups['nova_api_os_compute']
-
-- include: nova_init_common.yml
-  vars:
-    program_name: "{{ nova_scheduler_program_name }}"
-    service_name: "{{ nova_service_name }}"
-    system_user: "{{ nova_system_user_name }}"
-    system_group: "{{ nova_system_group_name }}"
-    service_home: "{{ nova_system_home_folder }}"
-  when: inventory_hostname in groups['nova_scheduler']
-
-- include: nova_init_common.yml
-  vars:
-    program_name: "{{ nova_compute_program_name }}"
-    service_name: "{{ nova_service_name }}"
-    system_user: "{{ nova_system_user_name }}"
-    system_group: "{{ nova_system_group_name }}"
-    service_home: "{{ nova_system_home_folder }}"
-  when: inventory_hostname in groups['nova_compute']
-
-# Upstart init script for spice console.
-- include: nova_init_common.yml
-  vars:
-    program_name: "{{ nova_spice_program_name }}"
-    service_name: "{{ nova_service_name }}"
-    system_user: "{{ nova_system_user_name }}"
-    system_group: "{{ nova_system_group_name }}"
-    service_home: "{{ nova_system_home_folder }}"
-  when:
-    - inventory_hostname in groups ['nova_console']
-    - nova_console_type == "spice"
-
-# Upstart init script for novnc console.
-- include: nova_init_common.yml
-  vars:
-    program_name: "{{ nova_novncproxy_program_name }}"
-    service_name: "{{ nova_service_name }}"
-    system_user: "{{ nova_system_user_name }}"
-    system_group: "{{ nova_system_group_name }}"
-    service_home: "{{ nova_system_home_folder }}"
-  when:
-    - inventory_hostname in groups ['nova_console']
-    - nova_console_type == "novnc"
-
-- include: nova_init_common.yml
-  vars:
-    program_name: "{{ nova_consoleauth_program_name }}"
-    service_name: "{{ nova_service_name }}"
-    system_user: "{{ nova_system_user_name }}"
-    system_group: "{{ nova_system_group_name }}"
-    service_home: "{{ nova_system_home_folder }}"
-  when: inventory_hostname in groups['nova_console']

tasks/nova_init_common.yml

@@ -5,7 +5,7 @@
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
-#     http://www.apache.org/licenses/LICENSE-2.0
+# http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
@@ -14,24 +14,16 @@
 # limitations under the License.
 
 - include: nova_init_upstart.yml
-  static: no
   when: pid1_name == "init"
-  tags:
-    - upstart-init
-    - nova-init
 
 - include: nova_init_systemd.yml
-  static: no
   when: pid1_name == "systemd"
-  tags:
-    - systemd-init
-    - nova-init
 
 - name: Load service
   service:
-   name: "{{ program_name }}"
+   name: "{{ item.value.service_name }}"
    enabled: "yes"
+  with_dict: "{{ nova_services }}"
+  when: inventory_hostname in groups[item.value.group]
   notify:
     - Restart nova services
-  tags:
-    - nova-init

tasks/nova_init_systemd.yml

@@ -15,19 +15,23 @@
 
 - name: Create TEMP run dir
   file:
-    path: "/var/run/{{ program_name }}"
+    path: "/var/run/{{ item.value.service_name }}"
     state: directory
-    owner: "{{ system_user }}"
-    group: "{{ system_group }}"
+    owner: "{{ nova_system_user_name }}"
+    group: "{{ nova_system_group_name }}"
     mode: "02755"
+  with_dict: "{{ nova_services }}"
+  when: inventory_hostname in groups[item.value.group]
 
 - name: Create TEMP lock dir
   file:
-    path: "/var/lock/{{ program_name }}"
+    path: "/var/lock/{{ item.value.service_name }}"
     state: directory
-    owner: "{{ system_user }}"
-    group: "{{ system_group }}"
+    owner: "{{ nova_system_user_name }}"
+    group: "{{ nova_system_group_name }}"
     mode: "02755"
+  with_dict: "{{ nova_services }}"
+  when: inventory_hostname in groups[item.value.group]
 
 - name: Create tempfile.d entry
   template:
@@ -36,18 +40,17 @@
     mode: "0644"
     owner: "root"
     group: "root"
+  with_dict: "{{ nova_services }}"
+  when: inventory_hostname in groups[item.value.group]
 
 - name: Place the systemd init script
   template:
     src: "nova-systemd-init.j2"
-    dest: "/etc/systemd/system/{{ program_name }}.service"
+    dest: "/etc/systemd/system/{{ item.value.service_name }}.service"
     mode: "0644"
     owner: "root"
     group: "root"
-  register: systemd_init
-
-- name: Reload the systemd daemon
-  command: "systemctl daemon-reload"
-  when: systemd_init | changed
+  with_dict: "{{ nova_services }}"
+  when: inventory_hostname in groups[item.value.group]
   notify:
-    - Restart nova services
+    - Reload systemd daemon

tasks/nova_init_upstart.yml

@@ -1,5 +1,5 @@
 ---
-# Copyright 2014, Rackspace US, Inc.
+# Copyright 2015, Rackspace US, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -16,21 +16,11 @@
 - name: Place the init script
   template:
     src: "nova-upstart-init.j2"
-    dest: "/etc/init/{{ program_name }}.conf"
+    dest: "/etc/init/{{ item.value.service_name }}.conf"
     mode: "0644"
     owner: "root"
     group: "root"
+  with_dict: "{{ nova_services }}"
+  when: inventory_hostname in groups[item.value.group]
   notify:
-    - Restart nova services
-  tags:
-    - upstart-init
-    - nova-init
-
-- name: Reload init scripts
-  shell: |
-    initctl reload-configuration
-  notify:
-    - Restart nova services
-  tags:
-    - upstart-init
-    - nova-init
+    - Reload upstart init scripts

templates/nova-systemd-init.j2

@@ -7,13 +7,13 @@ After=network.target
 
 [Service]
 Type=simple
-User={{ system_user }}
-Group={{ system_group }}
+User={{ nova_system_user_name }}
+Group={{ nova_system_group_name }}
 
 {% if program_override is defined %}
-ExecStart={{ program_override }} {{ program_config_options|default('') }} --log-file=/var/log/nova/{{ program_name }}.log
+ExecStart={{ program_override }} {{ program_config_options|default('') }} --log-file=/var/log/nova/{{ item.value.service_name }}.log
 {% else %}
-ExecStart={{ nova_bin }}/{{ program_name }} {{ program_config_options|default('') }} --log-file=/var/log/nova/{{ program_name }}.log
+ExecStart={{ nova_bin }}/{{ item.value.service_name }} {{ program_config_options|default('') }} --log-file=/var/log/nova/{{ item.value.service_name }}.log
 {% endif %}
 
 # Give a reasonable amount of time for the server to start up/shut down

templates/nova-systemd-tempfiles.j2

@@ -1,4 +1,4 @@
 # {{ ansible_managed }}
 
-D /var/lock/{{ program_name }} 2755 {{ system_user }} {{ system_group }}
-D /var/run/{{ program_name }} 2755 {{ system_user }} {{ system_group }}
+D /var/lock/{{ item.value.service_name }} 2755 {{ nova_system_user_name }} {{ nova_system_group_name }}
+D /var/run/{{ item.value.service_name }} 2755 {{ nova_system_user_name }} {{ nova_system_group_name }}

templates/nova-upstart-init.j2

@@ -1,6 +1,7 @@
 # {{ ansible_managed }}
 
-description "{{ program_name }}"
+
+description "{{ item.value.service_name }}"
 author "Kevin Carter <kevin.carter@rackspace.com>"
 
 start on runlevel [2345]
@@ -10,18 +11,18 @@ respawn
 respawn limit 10 5
 
 # Set the RUNBIN environment variable
-env RUNBIN="{{ nova_bin }}/{{ program_name }}"
+env RUNBIN="{{ nova_bin }}/{{ item.value.service_name }}"
 
 # Change directory to service users home
-chdir "{{ service_home }}"
+chdir "{{ nova_system_home_folder }}"
 
 # Pre start actions
 pre-start script
-  mkdir -p "/var/run/{{ program_name }}"
-  chown {{ system_user }}:{{ system_group }} "/var/run/{{ program_name }}"
+  mkdir -p "/var/run/{{ item.value.service_name }}"
+  chown {{ nova_system_user_name }}:{{ nova_system_group_name }} "/var/run/{{ item.value.service_name }}"
 
-  mkdir -p "/var/lock/{{ program_name }}"
-  chown {{ system_user }}:{{ system_group }} "/var/lock/{{ program_name }}"
+  mkdir -p "/var/lock/{{ item.value.service_name }}"
+  chown {{ nova_system_user_name }}:{{ nova_system_group_name }} "/var/lock/{{ item.value.service_name }}"
 
   . {{ nova_bin }}/activate
 
@@ -29,14 +30,15 @@ end script
 
 # Post stop actions
 post-stop script
-  rm "/var/run/{{ program_name }}/{{ program_name }}.pid"
+  rm "/var/run/{{ item.value.service_name }}/{{ item.value.service_name }}.pid"
 end script
 
 # Run the start up job
 exec start-stop-daemon --start \
-                       --chuid {{ system_user }} \
+                       --chuid {{ nova_system_user_name }} \
                        --make-pidfile \
-                       --pidfile /var/run/{{ program_name }}/{{ program_name }}.pid \
+                       --pidfile /var/run/{{ item.value.service_name }}/{{ item.value.service_name }}.pid \
                        --exec "{{ program_override|default('$RUNBIN') }}" \
                        -- {{ program_config_options|default('') }} \
-                       --log-file=/var/log/nova/{{ program_name }}.log
+                       --log-file=/var/log/{{ nova_service_name }}/{{ item.value.service_name }}.log
+