72 lines
3 KiB
YAML
72 lines
3 KiB
YAML
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---
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- name: Rollback impress to a previous version
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hosts: webserver
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become: yes
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become_user: impress
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vars:
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remote_project_root: "/srv/impress"
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ruby_version: "3.3.7"
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tasks:
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- name: Read the second-to-most-recent version
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command:
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chdir: "{{ remote_project_root }}/versions"
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cmd: bash -c 'ls | tail -n 2 | head -n 1'
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register: new_app_version
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- name: Print out the new version name
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debug:
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msg: "Rolling back to version: {{ new_app_version.stdout }}"
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- name: Save new remote folder path to a variable
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set_fact:
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remote_app_root: "{{ remote_project_root }}/versions/{{ new_app_version.stdout }}"
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- name: Configure Bundler to run in deployment mode
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command:
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chdir: "{{ remote_app_root }}"
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cmd: /opt/ruby-{{ ruby_version }}/bin/bundle config set --local deployment true
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# This ensures that, while attempting our current deploy, we don't
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# accidentally delete gems out from under the currently-running version.
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# NOTE: From reading the docs, I thiink this is the default behavior, but
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# I can't be sure? Rather than deep-dive to find out, I'd rather just set
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# it, to be clear about the default(?) behavior we're depending on.
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- name: Configure Bundler to *not* clean up old gems when installing
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command:
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chdir: "{{ remote_app_root }}"
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cmd: /opt/ruby-{{ ruby_version }}/bin/bundle config set --local clean false
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# NOTE: Bundler recommends this, and they're pretty smart about it: if the
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# Gemfile changes, this shouldn't disrupt the currently-running version,
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# because we won't clean up its now-unused gems yet, and if we upgrade a
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# gem it'll install *both* versions of the gem until we clean up.
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- name: Configure Bundler to use the bundle folder shared by all app versions
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command:
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chdir: "{{ remote_app_root }}"
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cmd: "/opt/ruby-{{ ruby_version }}/bin/bundle config set --local path {{ remote_project_root}}/shared/bundle"
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- name: Run `bundle install` to install dependencies in remote folder
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command:
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chdir: "{{ remote_app_root }}"
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# The `--local` flag instructs Bundler to use the cached dependencies
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# in `vendor/cache`, instead of reading from the web, which is much
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# faster and more reliable!
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cmd: /opt/ruby-{{ ruby_version }}/bin/bundle install --local
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- name: Update the `current` folder to point to the new version
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file:
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src: "{{ remote_app_root }}"
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dest: /srv/impress/current
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state: link
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# NOTE: This uses the passwordless sudo rule we set up in deploy:setup.
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# We write it as a command rather than using the built-in `systemd` Ansible
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# module, to make sure we're invoking it exactly as we wrote in that rule.
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#
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# NOTE: We use `sudo` instead of `become_user: root`, because we don't have
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# permission to *become* the root user; we only have permission to run this
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# one command as them.
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- name: Restart the app
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become: no
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command: sudo systemctl restart impress
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