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doc: How to control docker without root olivetin/docs.olivetin.app#40
2026-05-10 23:22:24 +01:00

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[#install-compose]
= Docker Compose install
Docker compose is a popular way to define multi-container applications using a
infrastructure as code approach.
If you personally prefer to use `docker compose`, then here is a sample to get
you started;
[source,yaml]
.`docker-compose.yml`
----
services:
olivetin:
container_name: olivetin
image: jamesread/olivetin
volumes:
- OliveTin-config:/config # replace host path or volume as needed
ports:
- "1337:1337"
restart: unless-stopped
volumes:
OliveTin-config:
external: false
----
include::partial$install/post_container.adoc[]
[#compose-docker-socket]
== Controlling other docker containers from a Docker Compose install of OliveTin
If you want OliveTin running in a container to control other Docker containers, pass the Docker socket into the service and give the container process membership in the same numeric `docker` group that owns the socket on the host.
On many Linux installs, Docker Engine creates a `docker` group automatically; see https://docs.docker.com/engine/install/linux-postinstall/#manage-docker-as-a-non-root-user[Manage Docker as a non-root user] in the Docker documentation.
=== Find the `docker` group GID on the host
On the Docker host, read the `docker` group numeric ID (third field of the output):
[source,bash]
----
getent group docker
----
If that command prints nothing, create the group or finish Docker post-install steps first, then retry.
=== Add the socket mount and `group_add` in Compose
In `docker-compose.yml`, bind-mount the socket and add `group_add` with that GID (as a string is fine). Replace the example GID with the value from your host:
[source,yaml]
.`docker-compose.yml` including Docker socket access without running as root
----
services:
olivetin:
container_name: olivetin
image: jamesread/olivetin
volumes:
- /docker/OliveTin:/config # replace host path or volume as needed
- /var/run/docker.sock:/var/run/docker.sock
group_add:
- "992" # <1>
----
<1> Replace `992` with the GID from `getent group docker` on the machine where Compose runs. The number is not portable between hosts.
This keeps the default container user while allowing access to `/var/run/docker.sock`, which is usually tighter than running the whole service as `root`.
See xref:action_examples/containers.adoc[containers] for `docker run`, `--privileged`, and other options if you cannot use a `docker` group on the host.
== Running the OliveTin container as a different user in Compose
If you need the service to run as a specific Unix user in Compose for reasons other than Docker socket access, set `user` explicitly, for example:
[source,yaml]
----
services:
olivetin:
container_name: olivetin
image: jamesread/olivetin
user: "1000:1000"
...
----
For Docker socket access from Compose, prefer <<compose-docker-socket,`group_add` with the host `docker` group GID>> instead of `user: root`.
NOTE: xref:troubleshooting/puid-pgid.adoc[PUID and PGID are not used] by the official OliveTin container image.
[#docker-compose-traefik]
== Using Traefik with Docker Compose
Traefik is a popular reverse proxy that seems to be used a lot in people's
Docker compose setups. See the xref:reverse-proxies/traefik.adoc[Traefik + Docker Compose] page for more details.