Use a common python build/install role
In order to radically simplify how we prepare the service venvs, we use a common role to do the wheel builds and the venv preparation. This makes the process far simpler to understand, because the role does its own building and installing. It also reduces the code maintenance burden, because instead of duplicating the build processes in the repo_build role and the service role - we only have it all done in a single place. We also change the role venv tag var to use the integrated build's common venv tag so that we can remove the role's venv tag in group_vars in the integrated build. This reduces memory consumption and also reduces the duplication. This is by no means the final stop in the simplification process, but it is a step forward. The will be work to follow which: 1. Replaces 'developer mode' with an equivalent mechanism that uses the common role and is simpler to understand. We will also simplify the provisioning of pip install arguments when doing this. 2. Simplifies the installation of optional pip packages. Right now it's more complicated than it needs to be due to us needing to keep the py_pkgs plugin working in the integrated build. Depends-On: https://review.openstack.org/598957 Change-Id: I7a6acaa94265b21fb886a775c3b5b86a4142a905 Implements: blueprint python-build-install-simplification Signed-off-by: Jesse Pretorius <jesse.pretorius@rackspace.co.uk>
This commit is contained in:
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2d8475e602
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@ -54,8 +54,18 @@ gnocchi_secure_proxy_ssl_header: HTTP_X_FORWARDED_PROTO
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#: Set this to false to disable API service through Apache + mod_wsgi
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gnocchi_use_mod_wsgi: true
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# TODO(odyssey4me):
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# This can be simplified once all the roles are using
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# python_venv_build. We can then switch to using a
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# set of constraints in pip.conf inside the venv,
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# perhaps prepared by giving a giving a list of
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# constraints to the role.
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gnocchi_pip_install_args: >-
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{{ gnocchi_developer_mode | ternary(pip_install_developer_constraints | default('--constraint /opt/developer-pip-constraints.txt'), '') }}
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{{ pip_install_options | default('') }}
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#: Name of the virtual env to deploy into
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gnocchi_venv_tag: untagged
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gnocchi_venv_tag: "{{ venv_tag | default('untagged') }}"
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gnocchi_bin: "/openstack/venvs/gnocchi-{{ gnocchi_venv_tag }}/bin"
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gnocchi_venv_pkgs: "/openstack/venvs/gnocchi-{{ gnocchi_venv_tag }}/lib/python2.7/site-packages"
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@ -27,7 +27,9 @@
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until: _stop is success
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retries: 5
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delay: 2
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listen: Restart gnocchi services
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listen:
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- "Restart gnocchi services"
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- "venv changed"
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# Note (odyssey4me):
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# The policy.json file is currently read continually by the services
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@ -45,7 +47,9 @@
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group: "{{ gnocchi_system_group_name }}"
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mode: "0640"
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remote_src: yes
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listen: Restart gnocchi services
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listen:
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- "Restart gnocchi services"
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- "venv changed"
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- name: Start services
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service:
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@ -61,7 +65,9 @@
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until: _start is success
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retries: 5
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delay: 2
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listen: Restart gnocchi services
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listen:
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- "Restart gnocchi services"
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- "venv changed"
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- name: Restart web server
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service:
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@ -13,17 +13,12 @@
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# See the License for the specific language governing permissions and
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# limitations under the License.
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- name: Install distro packages
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package:
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name: "{{ gnocchi_distro_packages }}"
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state: "{{ gnocchi_package_state }}"
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update_cache: "{{ (ansible_pkg_mgr in ['apt', 'zypper']) | ternary('yes', omit) }}"
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cache_valid_time: "{{ (ansible_pkg_mgr == 'apt') | ternary(cache_timeout, omit) }}"
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register: install_packages
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until: install_packages is success
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retries: 5
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delay: 2
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# TODO(odyssey4me):
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# This can be simplified once all the roles are using
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# python_venv_build. We can then switch to using a
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# set of constraints in pip.conf inside the venv,
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# perhaps prepared by giving a giving a list of
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# constraints to the role.
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- name: Create developer mode constraint file
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copy:
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dest: "/opt/developer-pip-constraints.txt"
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@ -33,118 +28,22 @@
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{% endfor %}
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when: gnocchi_developer_mode | bool
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- name: Retrieve checksum for venv download
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uri:
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url: "{{ gnocchi_venv_download_url | replace('tgz', 'checksum') }}"
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return_content: yes
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register: gnocchi_venv_checksum
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when: gnocchi_venv_download | bool
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- name: Attempt venv download
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get_url:
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url: "{{ gnocchi_venv_download_url }}"
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dest: "/var/cache/{{ gnocchi_venv_download_url | basename }}"
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checksum: "sha1:{{ gnocchi_venv_checksum.content | trim }}"
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register: gnocchi_get_venv
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when: gnocchi_venv_download | bool
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- name: Remove existing venv
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file:
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path: "{{ gnocchi_bin | dirname }}"
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state: absent
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when: gnocchi_get_venv is changed
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- name: Create gnocchi venv dir
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file:
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path: "{{ gnocchi_bin | dirname }}"
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state: directory
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mode: "0755"
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register: gnocchi_venv_dir
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when: gnocchi_get_venv is changed
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- name: Unarchive pre-built venv
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unarchive:
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src: "/var/cache/{{ gnocchi_venv_download_url | basename }}"
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dest: "{{ gnocchi_bin | dirname }}"
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copy: "no"
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when: gnocchi_get_venv is changed
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notify:
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- Restart gnocchi services
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- Restart web server
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- name: Create the python venv and install packages into it
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when: gnocchi_get_venv | failed or gnocchi_get_venv | skipped
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block:
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- name: Create the virtualenv (if it does not exist)
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command: "virtualenv --never-download --no-site-packages {{ gnocchi_bin | dirname }}"
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args:
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creates: "{{ gnocchi_bin }}/activate"
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- name: Upgrade pip/setuptools/wheel to the versions we want
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pip:
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name:
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- pip
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- setuptools
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- wheel
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state: "{{ gnocchi_pip_package_state }}"
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virtualenv: "{{ gnocchi_bin | dirname }}"
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virtualenv_site_packages: "no"
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extra_args: >-
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{{ gnocchi_developer_mode | ternary(pip_install_developer_constraints | default('--constraint /opt/developer-pip-constraints.txt'), '') }}
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{{ pip_install_options | default('') }}
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register: install_packages
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until: install_packages is success
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retries: 5
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delay: 2
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- name: Install pip packages
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pip:
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name: "{{ gnocchi_pip_packages }}"
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state: "{{ gnocchi_pip_package_state }}"
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virtualenv: "{{ gnocchi_bin | dirname }}"
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virtualenv_site_packages: "no"
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extra_args: >-
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{{ gnocchi_developer_mode | ternary(pip_install_developer_constraints | default('--constraint /opt/developer-pip-constraints.txt'), '') }}
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{{ pip_install_options | default('') }}
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register: install_packages
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until: install_packages is success
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retries: 5
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delay: 2
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notify:
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- Restart gnocchi services
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- Restart web server
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- name: Remove python from path first (CentOS, openSUSE)
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file:
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path: "{{ gnocchi_bin | dirname }}/bin/python2.7"
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state: "absent"
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- name: Ensure remote wheel building is disabled in developer mode
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set_fact:
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venv_build_host: "{{ ansible_hostname }}"
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when:
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- ansible_pkg_mgr in ['yum', 'dnf', 'zypper']
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- gnocchi_get_venv is changed
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- gnocchi_developer_mode | bool
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# NOTE(odyssey4me):
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# We reinitialize the venv to ensure that the right
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# version of python is in the venv, but we do not
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# want virtualenv to also replace pip, setuptools
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# and wheel so we tell it not to.
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# We do not use --always-copy for CentOS/SuSE due
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# to https://github.com/pypa/virtualenv/issues/565
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- name: Update virtualenv path
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shell: |
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find {{ gnocchi_bin }} -name \*.pyc -delete
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sed -si '1s/^.*python.*$/#!{{ gnocchi_bin | replace ('/','\/') }}\/python/' {{ gnocchi_bin }}/*
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virtualenv {{ gnocchi_bin | dirname }} \
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{{ (ansible_pkg_mgr == 'apt') | ternary('--always-copy', '') }} \
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--no-pip \
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--no-setuptools \
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--no-wheel
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when: gnocchi_get_venv is changed
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tags:
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- skip_ansible_lint
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- name: Record the venv tag deployed
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ini_file:
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dest: "/etc/ansible/facts.d/openstack_ansible.fact"
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section: gnocchi
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option: venv_tag
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value: "{{ gnocchi_venv_tag }}"
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- name: Install the python venv
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include_role:
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name: "python_venv_build"
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private: yes
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vars:
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venv_install_destination_path: "{{ gnocchi_bin | dirname }}"
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venv_install_distro_package_list: "{{ gnocchi_distro_packages }}"
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venv_pip_install_args: "{{ gnocchi_pip_install_args }}"
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venv_pip_packages: "{{ gnocchi_pip_packages }}"
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venv_facts_when_changed:
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- section: "gnocchi"
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option: "venv_tag"
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value: "{{ gnocchi_venv_tag }}"
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