Switch back to docker for gerrit and nodepool-builder

We rolled out review-dev with podman and it worked fine for us. It
worked less fine for nodepool-builder, although we still might be
able to solve it. Maybe right now isn't the time to do this switch.
Gitea, gitea-lb and zuul-registry all use docker instead of podman.

The only thing running with podman right now is review-dev. We can
do a manual cleanup of podman there before runnign this to keep
things simple:

  - stop gerrit service
  - uninstall podman and podman-compose
  - uninstall podman ppa config
  - uninstall pip3

Then let ansible install docker and docker compose up.

Story: #2007407
Task: #39062
Change-Id: I9bf99b18559d49d11ba99a96f02a4a45a4f65a86

playbooks/roles/gerrit/tasks/main.yaml

@@ -266,28 +266,25 @@
   when: gerrit_redirect_vhost is defined
   notify: gerrit Reload apache2
 
-- name: Install podman-compose
-  pip:
-    name: podman-compose
-    state: latest
-    # NOTE(mordred) Cannot use full path to pip3 here because it is
-    # different on zuul test nodes and in production. This is, of
-    # course, not stellar.
-    executable: pip3
+- name: Install docker-compose
+  package:
+    name:
+      - docker-compose
+    state: present
 
 # TODO(mordred) Make this suck less, like if we could do an init container
 # or something just generally less gross.
 - name: Run gerrit init
   when: gerrit_run_init | bool
   command: >
-    podman run -it --rm --net=host -u gerrit
+    docker run --rm --net=host -u gerrit
     {% for volume in gerrit_container_volumes %}
     -v {{ volume }}
     {% endfor %}
     {{ gerrit_container_image }}
     /usr/local/openjdk-8/bin/java -jar /var/gerrit/bin/gerrit.war init -d /var/gerrit -b --no-auto-start --install-all-plugins
 
-- name: Run podman-compose up
+- name: Run docker-compose up
   shell:
-    cmd: podman-compose up -d
+    cmd: docker-compose up -d
     chdir: /etc/gerrit-compose/

playbooks/roles/nodepool-builder/tasks/main.yaml

@@ -25,16 +25,18 @@
     dest: /etc/nodepool-builder-compose/docker-compose.yaml
     mode: 0644
 
-- name: Install podman-compose
-  pip:
-    name: podman-compose
-    state: latest
-    # NOTE(mordred) Cannot use full path to pip3 here because it is
-    # different on zuul test nodes and in production. This is, of
-    # course, not stellar.
-    executable: pip3
+- name: Install docker-compose
+  package:
+    name:
+      - docker-compose
+    state: present
 
-- name: Run podman-compose up
+- name: Run docker-compose pull
   shell:
-    cmd: podman-compose up -d
+    cmd: docker-compose pull
+    chdir: /etc/nodepool-builder-compose/
+
+- name: Run docker-compose up
+  shell:
+    cmd: docker-compose up -d
     chdir: /etc/nodepool-builder-compose/

playbooks/service-nodepool.yaml

@@ -10,8 +10,7 @@
   name: "Configure nodepool builders"
   strategy: free
   roles:
-    - pip3
-    - install-podman
+    - install-docker
     - nodepool-base
     - configure-openstacksdk
     - nodepool-builder
@@ -19,4 +18,4 @@
 
 # TODO(ianw) 2020-03-03 : watch this space...
 #- hosts: nodepool-launcher_opendev:!disabled
-#  name: "Configure nodepool launchers"
+#  name: "Configure nodepool launchers"

playbooks/service-review-dev.yaml

@@ -1,8 +1,7 @@
 - hosts: "review-dev:!disabled"
   name: "Configure gerrit on review-dev"
   roles:
-    - pip3
-    - install-podman
+    - install-docker
     - role: gerrit
       gerrit_ssh_rsa_key_contents: "{{ gerrit_dev_ssh_rsa_key_contents }}"
       gerrit_ssh_rsa_pubkey_contents: "{{ gerrit_dev_ssh_rsa_pubkey_contents }}"

playbooks/service-review.yaml

@@ -1,6 +1,5 @@
 - hosts: "review:!disabled"
   name: "Configure gerrit"
   roles:
-    - pip3
-    - install-podman
+    - install-docker
     - gerrit

testinfra/test_nodepool.py

@@ -36,8 +36,8 @@ def test_builder_container_running(host):
     if host.backend.get_hostname() != 'nb01-test.opendev.org':
         pytest.skip()
 
-    cmd = host.run("podman ps -a --format '{{ .Names }}'")
-    assert 'nodepool-builder-compose_nodepool-builder_1' in cmd.stdout
+    cmd = host.run("docker ps -a --format '{{ .Names }}'")
+    assert 'nodepoolbuildercompose_nodepool-builder_1' in cmd.stdout
 
 def test_builder_webserver_running(host):
     if host.backend.get_hostname() != 'nb01-test.opendev.org':