pleroma/installation/release-to-docker/README.md
2026-01-26 20:51:35 +02:00

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# Run OTP releases on older glibc using Docker
Pleroma OTP releases are built on specific distros and may require a newer `glibc`
than your host has. A typical failure looks like:
```
... /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.38' not found ...
```
If you don't want to upgrade your host OS, you can run the existing OTP release
from `/opt/pleroma` inside an Ubuntu 24.04 container while keeping your existing
host paths (`/etc/pleroma`, `/var/lib/pleroma`, etc.).
This folder provides a "shim" container + systemd unit. It is **not** the Pleroma
Docker image.
## What this does
- Builds a small Ubuntu 24.04 image with runtime libs (including newer `glibc`).
- Mounts your existing host release at `/opt/pleroma` into the container.
- Runs as the same UID/GID that owns `/opt/pleroma` on the host (via `gosu`).
- Optionally runs migrations automatically on container start.
- Uses `network_mode: host` so your existing config that talks to `localhost`
keeps working.
## Setup (Debian/Ubuntu host)
1. Install Docker Engine + the Docker Compose plugin.
2. Copy these files to a stable location (example: `/etc/pleroma/container`):
```
mkdir -p /etc/pleroma/container
cp -a /opt/pleroma/installation/release-to-docker/* /etc/pleroma/container/
```
3. Build the shim image:
```
cd /etc/pleroma/container
docker compose build
```
4. Replace your systemd unit:
```
cp /etc/pleroma/container/pleroma.service /etc/systemd/system/pleroma.service
systemctl daemon-reload
systemctl enable --now pleroma
journalctl -u pleroma -f
```
## Running `pleroma_ctl`
Since the host binary may not run on older `glibc`, run admin commands inside the
container:
```
cd /etc/pleroma/container
docker compose exec pleroma /opt/pleroma/bin/pleroma_ctl status
docker compose run --rm --no-deps pleroma /opt/pleroma/bin/pleroma_ctl migrate
```
## Configuration notes
- Migrations run automatically by default.
- Set `PLEROMA_RUN_MIGRATIONS=0` in `docker-compose.yml` to disable.