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.
3. Deduplicates the distro package installs. Right now the
   role installs the distro packages twice - just before
   building the venv, and during the python_venv_build role
   execution.

Depends-On: https://review.openstack.org/598957
Change-Id: I29833c41eba9b3ff80200b7f567a120f589e170e
Implements: blueprint python-build-install-simplification
Signed-off-by: Jesse Pretorius <jesse.pretorius@rackspace.co.uk>
This commit is contained in:
Jesse Pretorius 2018-03-27 21:59:07 +01:00 committed by Jesse Pretorius (odyssey4me)
parent 6d58f83013
commit faee049e24
6 changed files with 48 additions and 122 deletions

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@ -42,8 +42,19 @@ designate_developer_mode: False
designate_developer_constraints:
- "git+{{ designate_git_repo }}@{{ designate_git_install_branch }}#egg=designate"
# TODO(odyssey4me):
# This can be simplified once all the roles are using
# python_venv_build. We can then switch to using a
# set of constraints in pip.conf inside the venv,
# perhaps prepared by giving a giving a list of
# constraints to the role.
designate_pip_install_args: >-
{{ designate_developer_mode | ternary(pip_install_developer_constraints | default('--constraint /opt/developer-pip-constraints.txt'), '') }}
{{ (pip_install_upper_constraints is defined) | ternary('--constraint ' + pip_install_upper_constraints | default(''), '') }}
{{ pip_install_options | default('') }}
# Name of the virtual env to deploy into
designate_venv_tag: untagged
designate_venv_tag: "{{ venv_tag | default('untagged') }}"
designate_bin: "{{ _designate_bin }}"
# Set the etc dir path where designate is installed.

View File

@ -23,7 +23,9 @@
until: _stop is success
retries: 5
delay: 2
listen: Restart designate services
listen:
- "Restart designate services"
- "venv changed"
# Note (odyssey4me):
# The policy.json file is currently read continually by the services
@ -41,7 +43,9 @@
group: "{{ designate_system_group_name }}"
mode: "0640"
remote_src: yes
listen: Restart designate services
listen:
- "Restart designate services"
- "venv changed"
- name: Start services
systemd:
@ -52,4 +56,6 @@
until: _start is success
retries: 5
delay: 2
listen: Restart designate services
listen:
- "Restart designate services"
- "venv changed"

View File

@ -13,18 +13,12 @@
# See the License for the specific language governing permissions and
# limitations under the License.
- name: Install designate distro packages
package:
name: "{{ designate_developer_mode_distro_packages }}"
state: "{{ designate_package_state }}"
update_cache: "{{ (ansible_pkg_mgr in ['apt', 'zypper']) | ternary('yes', omit) }}"
cache_valid_time: "{{ (ansible_pkg_mgr == 'apt') | ternary(cache_timeout, omit) }}"
when: designate_developer_mode | bool
register: install_packages
until: install_packages|success
retries: 5
delay: 2
# TODO(odyssey4me):
# This can be simplified once all the roles are using
# python_venv_build. We can then switch to using a
# set of constraints in pip.conf inside the venv,
# perhaps prepared by giving a giving a list of
# constraints to the role.
- name: Create developer mode constraint file
copy:
dest: "/opt/developer-pip-constraints.txt"
@ -34,108 +28,23 @@
{% endfor %}
when: designate_developer_mode | bool
- name: Retrieve checksum for venv download
uri:
url: "{{ designate_venv_download_url | replace('tgz', 'checksum') }}"
return_content: yes
register: designate_venv_checksum
when: designate_venv_download | bool
- name: Attempt venv download
get_url:
url: "{{ designate_venv_download_url }}"
dest: "/var/cache/{{ designate_venv_download_url | basename }}"
checksum: "sha1:{{ designate_venv_checksum.content | trim }}"
register: designate_get_venv
when: designate_venv_download | bool
- name: Remove existing venv
file:
path: "{{ designate_bin | dirname }}"
state: absent
when: designate_get_venv is changed
- name: Create designate venv dir
file:
path: "{{ designate_bin | dirname }}"
state: directory
mode: "0755"
register: designate_venv_dir
when: designate_get_venv is changed
- name: Unarchive pre-built venv
unarchive:
src: "/var/cache/{{ designate_venv_download_url | basename }}"
dest: "{{ designate_bin | dirname }}"
copy: "no"
when: designate_get_venv is changed
notify:
- Restart designate services
- name: Install pip packages
pip:
name: "{{ designate_pip_packages }}"
state: "{{ designate_pip_package_state }}"
virtualenv: "{{ designate_bin | dirname }}"
virtualenv_site_packages: "no"
extra_args: >-
{{ designate_developer_mode | ternary(pip_install_developer_constraints | default('--constraint /opt/developer-pip-constraints.txt'), '') }}
{{ (pip_install_upper_constraints is defined) | ternary('--constraint ' + pip_install_upper_constraints | default(''),'') }}
{{ pip_install_options | default('') }}
register: install_packages
until: install_packages is success
retries: 5
delay: 2
when: designate_get_venv | failed or designate_get_venv | skipped
notify:
- Restart designate services
- name: Remove python from path first (CentOS, openSUSE)
file:
path: "{{ designate_bin | dirname }}/bin/python2.7"
state: "absent"
- name: Ensure remote wheel building is disabled in developer mode
set_fact:
venv_build_host: "{{ ansible_hostname }}"
when:
- ansible_pkg_mgr in ['yum', 'dnf', 'zypper']
- not designate_developer_mode | bool
- designate_get_venv is changed
- designate_developer_mode | bool
# NOTE(odyssey4me):
# We reinitialize the venv to ensure that the right
# version of python is in the venv, but we do not
# want virtualenv to also replace pip, setuptools
# and wheel so we tell it not to.
# We do not use --always-copy for CentOS/SuSE due
# to https://github.com/pypa/virtualenv/issues/565
- name: Update virtualenv path
shell: |
find {{ designate_bin }} -name \*.pyc -delete
sed -si '1s/^.*python.*$/#!{{ designate_bin | replace ('/','\/') }}\/python/' {{ designate_bin }}/*
virtualenv {{ designate_bin | dirname }} \
{{ (ansible_pkg_mgr == 'apt') | ternary('--always-copy', '') }} \
--no-pip \
--no-setuptools \
--no-wheel
when: designate_get_venv is changed
tags:
- skip_ansible_lint
- name: Install optional pip packages
pip:
name: "{{ designate_optional_oslomsg_amqp1_pip_packages }}"
state: "{{ designate_pip_package_state }}"
virtualenv: "{{ designate_bin | dirname }}"
virtualenv_site_packages: "no"
when: designate_oslomsg_amqp1_enabled
register: install_optional_packages
until: install_optional_packages is success
retries: 5
delay: 2
notify:
- Restart designate services
- name: Record the venv tag deployed
ini_file:
dest: "/etc/ansible/facts.d/openstack_ansible.fact"
section: designate
option: venv_tag
value: "{{ designate_venv_tag }}"
- name: Install the python venv
include_role:
name: "python_venv_build"
private: yes
vars:
venv_build_distro_package_list: "{{ designate_devel_distro_packages }}"
venv_install_destination_path: "{{ designate_bin | dirname }}"
venv_install_distro_package_list: "{{ designate_distro_packages }}"
venv_pip_install_args: "{{ designate_pip_install_args }}"
venv_pip_packages: "{{ (designate_oslomsg_amqp1_enabled | bool) | ternary(designate_pip_packages + designate_optional_oslomsg_amqp1_pip_packages, designate_pip_packages) }}"
venv_facts_when_changed:
- section: "designate"
option: "venv_tag"
value: "{{ designate_venv_tag }}"

View File

@ -32,5 +32,5 @@ designate_service_distro_packages:
designate_rndc_packages:
- bind
designate_developer_mode_distro_packages:
designate_devel_distro_packages:
- systemd-devel

View File

@ -30,6 +30,6 @@ designate_service_distro_packages:
designate_rndc_packages:
- bind-utils
designate_developer_mode_distro_packages:
designate_devel_distro_packages:
- pkg-config
- systemd-devel

View File

@ -35,7 +35,7 @@ designate_service_distro_packages:
designate_rndc_packages:
- bind9utils
designate_developer_mode_distro_packages:
designate_devel_distro_packages:
- build-essential
- libsystemd-dev
- pkg-config