Only install to virtual environment

Remove all tasks and variables related to toggling between installation
of aodh inside or outside of a Python virtual environment.
Installing within a venv is now the only supported deployment.

Additionally, a few changes have been made to make the creation of the
venv more resistant to interruptions during a run of the role.
* unarchiving a pre-built venv will now also occur when the venv
  directory is created, not only after being downloaded
* virtualenv-tools is run against both pre-built and non pre-built venvs
  to account for interruptions during or prior to unarchiving

Change-Id: Icf788b07738bf03708c05929bb82c7b51605ccca
Implements: blueprint only-install-venvs

defaults/main.yml

@@ -26,15 +26,7 @@ aodh_developer_constraints:
 
 # Name of the virtual env to deploy into
 aodh_venv_tag: untagged
-aodh_venv_bin: "/openstack/venvs/aodh-{{ aodh_venv_tag }}/bin"
-
-# Set this to enable or disable installing in a venv
-aodh_venv_enabled: true
-
-# The bin path defaults to the venv path however if installation in a
-#  venv is disabled the bin path will be dynamically set based on the
-#  system path used when the installing.
-aodh_bin: "{{ aodh_venv_bin }}"
+aodh_bin: "/openstack/venvs/aodh-{{ aodh_venv_tag }}/bin"
 
 aodh_venv_download_url: http://127.0.0.1/venvs/untagged/ubuntu/aodh.tgz
 

releasenotes/notes/os_aodh-only-install-venv-3c80a0a66824fcd7.yaml

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - Installation of aodh and its dependent pip packages will now only
+    occur within a Python virtual environment. The ``aodh_venv_enabled``
+    and ``aodh_venv_bin`` variables have been removed.

tasks/aodh_install.yml

@@ -83,7 +83,6 @@
     get_md5: False
   when:
     - not aodh_developer_mode | bool
-    - aodh_venv_enabled | bool
   register: local_venv_stat
   tags:
     - aodh-install
@@ -95,7 +94,6 @@
     return_content: True
   when:
     - not aodh_developer_mode | bool
-    - aodh_venv_enabled | bool
   register: remote_venv_checksum
   tags:
     - aodh-install
@@ -115,7 +113,6 @@
   register: get_venv
   when:
     - not aodh_developer_mode | bool
-    - aodh_venv_enabled | bool
     - (local_venv_stat.stat.exists == False or
         {{ local_venv_stat.stat.checksum is defined and local_venv_stat.stat.checksum != remote_venv_checksum.content | trim }})
   tags:
@@ -125,17 +122,15 @@
 - name: Set aodh get_venv fact
   set_fact:
     aodh_get_venv: "{{ get_venv }}"
-  when: aodh_venv_enabled | bool
   tags:
     - aodh-install
     - aodh-pip-packages
 
 - name: Remove existing venv
   file:
-    path: "{{ aodh_venv_bin | dirname }}"
+    path: "{{ aodh_bin | dirname }}"
     state: absent
   when:
-    - aodh_venv_enabled | bool
     - aodh_get_venv | changed
   tags:
     - aodh-install
@@ -143,11 +138,11 @@
 
 - name: Create aodh venv dir
   file:
-    path: "{{ aodh_venv_bin | dirname }}"
+    path: "{{ aodh_bin | dirname }}"
     state: directory
+  register: aodh_venv_dir
   when:
     - not aodh_developer_mode | bool
-    - aodh_venv_enabled | bool
     - aodh_get_venv | changed
   tags:
     - aodh-install
@@ -156,33 +151,21 @@
 - name: Unarchive pre-built venv
   unarchive:
     src: "/var/cache/{{ aodh_venv_download_url | basename }}"
-    dest: "{{ aodh_venv_bin | dirname }}"
+    dest: "{{ aodh_bin | dirname }}"
     copy: "no"
   when:
     - not aodh_developer_mode | bool
-    - aodh_venv_enabled | bool
-    - aodh_get_venv | changed
+    - aodh_get_venv | changed or aodh_venv_dir | changed
   notify: Restart aodh services
   tags:
     - aodh-install
     - aodh-pip-packages
 
-- name: Update virtualenv path
-  command: >
-    virtualenv-tools --update-path=auto {{ aodh_venv_bin | dirname }}
-  when:
-    - not aodh_developer_mode | bool
-    - aodh_venv_enabled | bool
-    - aodh_get_venv | success
-  tags:
-    - aodh-install
-    - aodh-pip-packages
-
-- name: Install pip packages (venv)
+- name: Install pip packages
   pip:
     name: "{{ item }}"
     state: latest
-    virtualenv: "{{ aodh_venv_bin | dirname }}"
+    virtualenv: "{{ aodh_bin | dirname }}"
     virtualenv_site_packages: "no"
     extra_args: "{{ pip_install_options_fact }}"
   register: install_packages
@@ -191,28 +174,17 @@
   delay: 2
   with_items: "{{ aodh_pip_packages }}"
   when:
-    - aodh_venv_enabled | bool
     - aodh_get_venv | failed or aodh_developer_mode | bool
   notify: Restart aodh services
   tags:
     - aodh-install
     - aodh-pip-packages
 
-- name: Install pip packages (no venv)
-  pip:
-    name: "{{ item }}"
-    state: latest
-    extra_args: "{{ pip_install_options_fact }}"
-  register: install_packages
-  until: install_packages|success
-  retries: 5
-  delay: 2
-  with_items: "{{ aodh_pip_packages }}"
+- name: Update virtualenv path
+  command: >
+    virtualenv-tools --update-path=auto {{ aodh_bin | dirname }}
   when:
     - not aodh_developer_mode | bool
-    - not aodh_venv_enabled | bool
-
-  notify: Restart aodh services
   tags:
     - aodh-install
-    - aodh-pip-packages
+    - aodh-pip-packages

tasks/aodh_post_install.yml

@@ -13,22 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-- name: Get aodh command path
-  command: which aodh-api
-  register: aodh_command_path
-  when:
-    - not aodh_venv_enabled | bool
-  tags:
-    - aodh-command-bin
-
-- name: Set aodh command path
-  set_fact:
-    aodh_bin: "{{ aodh_command_path.stdout | dirname }}"
-  when:
-    - not aodh_venv_enabled | bool
-  tags:
-    - aodh-command-bin
-
 - name: Copy aodh config
   config_template:
     src: "{{ item.src }}"

tasks/aodh_pre_install.yml

@@ -48,17 +48,6 @@
   tags:
     - aodh-dirs
 
-- name: Create aodh venv dir
-  file:
-    path: "{{ item.path }}"
-    state: directory
-  with_items:
-    - { path: "/openstack/venvs" }
-    - { path: "{{ aodh_venv_bin }}" }
-  when: aodh_venv_enabled | bool
-  tags:
-    - aodh-dirs
-
 - name: Test for log directory or link
   shell: |
     if [ -h "/var/log/aodh"  ]; then

templates/aodh-upstart-init.j2

@@ -24,9 +24,7 @@ pre-start script
   mkdir -p "/var/lock/{{ program_name }}"
   chown {{ system_user }}:{{ system_group }} "/var/lock/{{ program_name }}"
 
-  {% if aodh_venv_enabled | bool -%}
   . {{ aodh_bin }}/activate
-  {%- endif %}
 
 end script