Add {{ docker_host }} variable.

env.yml

@@ -3,6 +3,7 @@ timezone: "Europe/Paris"
 host_uid: 1000
 docker_projects_dir: "{{ ansible_env['HOME'] }}/docker-projects"
 project_dir: "{{ docker_projects_dir }}/{{ role_name }}"
+docker_host: "unix:///run/user/{{ host_uid }}/docker.sock"
 
 # UID shift for mapping between host & containers
 uid_shift: 99999

roles/dockerd/tasks/main.yml

@@ -40,7 +40,7 @@
   lineinfile:
     path: "{{ ansible_env['HOME'] }}/.profile"
     regex: '^export DOCKER_HOST='
-    line: "export DOCKER_HOST=unix:///run/user/{{ host_uid }}/docker.sock"
+    line: "export DOCKER_HOST={{ docker_host }}"
 
 - name: "Make sure lingering is enabled for user {{ host_uid }}"
   command:

roles/hedgedoc/tasks/backup.yml

@@ -1,7 +1,7 @@
 - name: Backup MySQL database
   community.docker.docker_container_exec:
     container: hedgedoc-mysql
-    docker_host: "unix:///run/user/{{ host_uid }}/docker.sock"
+    docker_host: "{{ docker_host }}"
     argv:
       - /bin/bash
       - "-c"

roles/postgres/tasks/backup.yml

@@ -8,7 +8,7 @@
     -
     --stdin-name dumpall.sql
   environment:
-    DOCKER_HOST: "unix:///run/user/{{ host_uid }}/docker.sock"
+    DOCKER_HOST: "{{ docker_host }}"
     BORG_PASSCOMMAND: "cat {{ borg_passphrase_file }}"
   become: true
 

roles/synapse/tasks/backup.yml

@@ -1,7 +1,7 @@
 - name: Backup PostgreSQL database
   community.docker.docker_container_exec:
     container: synapse-postgres
-    docker_host: "unix:///run/user/{{ host_uid }}/docker.sock"
+    docker_host: "{{ docker_host }}"
     command: |
       pg_dump -c
       -d synapse