Stop managing gerrit's local git mirror dir

We stopped serving this content and the next step is to stop managing it
internally. This depends on a change to jeepyb that makes the local git
dir management on the jeepyb side optional. Once that lands we can
update our configs to tell jeepyb to stop managing it.

We also stop doing garbage collection, mounting it into containers that
don't need it, etc.

Depends-On: https://review.opendev.org/758597
Change-Id: I2185e90edfcac71941bc29a4e11b7b2d4c7c2e13

doc/source/jeepyb.rst

@@ -44,7 +44,6 @@ connect to things or how to operate is in
 
      [projects]
      homepage=http://example.org
-     local-git-dir=/var/lib/git
      gerrit-host=review.example.org
      gerrit-user=example-project-creator
      gerrit-key=/home/gerrit2/.ssh/example_project_id_rsa

playbooks/rename_repos.yaml

@@ -26,13 +26,13 @@
         owner: gerrit2
         mode: 0755
       with_nested:
-        - [ '~gerrit2/review_site/git/', '/opt/lib/git/' ]
+        - [ '~gerrit2/review_site/git/' ]
         - "{{ repos }}"
 
     - name: Rename git repos on gerrit
       shell: mv {{ item[0] }}{{ item[1].old }}.git {{ item[0] }}{{ item[1].new }}.git
       with_nested:
-        - [ '~gerrit2/review_site/git/', '/opt/lib/git/' ]
+        - [ '~gerrit2/review_site/git/' ]
         - "{{ repos }}"
 
 - hosts: gitea

playbooks/roles/gerrit/defaults/main.yaml

@@ -19,7 +19,6 @@ gerrit_container_volumes:
   - /home/gerrit2/.ssh:/var/gerrit/.ssh
   - /opt/project-config/gerrit/projects.yaml:/var/gerrit/etc/projects.yaml
   - /opt/project-config/gerrit/projects.ini:/var/gerrit/etc/projects.ini
-  - /opt/lib/git:/opt/lib/git
 gerrit_database_type: MYSQL
 gerrit_project_creator_user: openstack-project-creator
 gerrit_manage_projects_args: "-v"

playbooks/roles/gerrit/tasks/main.yaml

@@ -309,7 +309,7 @@
 - name: Set up cron job to optmize local mirror git repos
   cron:
     name: optmize-local-git-repos
-    state: present
+    state: absent
     user: gerrit2
     job: 'find /opt/lib/git/ -type d -name "*.git" -print -exec git --git-dir="{}" gc \;'
     minute: 17

playbooks/roles/gerrit/templates/manage-projects.j2

@@ -18,7 +18,6 @@ exec docker run --rm --net=host -u root \
   -v/opt/project-config:/opt/project-config \
   -v/opt/project-config/gerrit/acls:/home/gerrit2/acls \
   -v/opt/project-config/gerrit/projects.yaml:/home/gerrit2/projects.yaml \
-  -v/opt/lib/git:/opt/lib/git \
   -v/opt/lib/jeepyb:/opt/lib/jeepyb \
   -v/home/gerrit2/review_site/etc/ssh_project_rsa_key:/home/gerrit2/review_site/etc/ssh_project_rsa_key \
   -v/home/gerrit2/projects.ini:/home/gerrit2/projects.ini \

playbooks/roles/gerrit/templates/projects.ini.j2

@@ -1,7 +1,6 @@
 [projects]
 homepage=https://opendev.org
 acl-dir=/home/gerrit2/acls
-local-git-dir=/opt/lib/git
 jeepyb-cache-dir=/opt/lib/jeepyb
 gerrit-host={{ gerrit_vhost_name }}
 gerrit-user={{ gerrit_project_creator_user }}

playbooks/roles/gerrit/templates/track-upstream.j2

@@ -17,7 +17,6 @@
 exec docker run --rm --net=host -u root \
   -v/opt/project-config:/opt/project-config \
   -v/opt/project-config/gerrit/projects.yaml:/home/gerrit2/projects.yaml \
-  -v/opt/lib/git:/opt/lib/git \
   -v/opt/lib/jeepyb:/opt/lib/jeepyb \
   -v/home/gerrit2/review_site/etc/ssh_project_rsa_key:/home/gerrit2/review_site/etc/ssh_project_rsa_key \
   -v/home/gerrit2/projects.ini:/home/gerrit2/projects.ini \