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title
mastodon

linuxserver/mastodon

Mastodon is a free, open-source social network server based on ActivityPub where users can follow friends and discover new ones..

Supported Architectures

We utilise the docker manifest for multi-platform awareness. More information is available from docker here and our announcement here.

Simply pulling lscr.io/linuxserver/mastodon:latest should retrieve the correct image for your arch, but you can also pull specific arch images via tags.

The architectures supported by this image are:

Architecture	Available	Tag
x86-64	✅	amd64-<version tag>
arm64	✅	arm64v8-<version tag>
armhf	❌

Version Tags

This image provides various versions that are available via tags. Please read the descriptions carefully and exercise caution when using unstable or development tags.

Tag	Available	Description
latest	✅	Stable releases.
develop	✅	Pre-releases only.
glitch	✅	glitch-soc fork releases.

Application Setup

We provide aliases for the common commands that execute in the correct context so that environment variables from secrets are available to them:

To generate keys for SECRET_KEY_BASE & OTP_SECRET run docker run --rm -it --entrypoint /bin/bash lscr.io/linuxserver/mastodon generate-secret once for each.
To generate keys for VAPID_PRIVATE_KEY & VAPID_PUBLIC_KEY run docker run --rm -it --entrypoint /bin/bash lscr.io/linuxserver/mastodon generate-vapid

Both of the secret generation aliases above can be run without any other setup having been carried out.

To use tootctl you can run something like docker exec -it lscr.io/linuxserver/mastodon /tootctl <command>

Using tootctl requires you to complete the initial Mastodon configuration first.

This container requires separate postgres and redis instances to run.

We support all of the official environment variables for configuration. In place of adding them all to your run/compose you can use an env file such as this example from the upstream project.

For more information check out the mastodon documentation.

Running separate sidekiq instances

It is currently only supported to run a single queue per container instance or all queues in a single container instance.

All containers must share the same /config mount and be on a common docker network.

NO_CHOWN Option

On larger Mastodon instances, our init process to verify that permissions are set correctly can noticeably slow down the container startup. If you are experiencing this, you can set NO_CHOWN to true to skip that step of the init.

Do NOT set this on first run of the container. If you enable this option you are taking full responsibility for ensuring that the permissions in your /config mount are correct. If you're even slightly unsure, don't set it.

Strict reverse proxies

This image automatically redirects to https with a self-signed certificate. If you are using a reverse proxy which validates certificates, you need to disable this check for the container.

Usage

To help you get started creating a container from this image you can either use docker-compose or the docker cli.

docker-compose (recommended, click here for more info)

---
version: "2.1"
services:
  mastodon:
    image: lscr.io/linuxserver/mastodon:latest
    container_name: mastodon
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Etc/UTC
      - LOCAL_DOMAIN=example.com
      - REDIS_HOST=redis
      - REDIS_PORT=6379
      - DB_HOST=db
      - DB_USER=mastodon
      - DB_NAME=mastodon
      - DB_PASS=mastodon
      - DB_PORT=5432
      - ES_ENABLED=false
      - SECRET_KEY_BASE=
      - OTP_SECRET=
      - VAPID_PRIVATE_KEY=
      - VAPID_PUBLIC_KEY=
      - SMTP_SERVER=mail.example.com
      - SMTP_PORT=25
      - SMTP_LOGIN=
      - SMTP_PASSWORD=
      - SMTP_FROM_ADDRESS=notifications@example.com
      - S3_ENABLED=false
      - WEB_DOMAIN=mastodon.example.com #optional
      - ES_HOST=es #optional
      - ES_PORT=9200 #optional
      - ES_USER=elastic #optional
      - ES_PASS=elastic #optional
      - S3_BUCKET= #optional
      - AWS_ACCESS_KEY_ID= #optional
      - AWS_SECRET_ACCESS_KEY= #optional
      - S3_ALIAS_HOST= #optional
      - SIDEKIQ_ONLY=false #optional
      - SIDEKIQ_QUEUE= #optional
      - SIDEKIQ_DEFAULT=false #optional
      - SIDEKIQ_THREADS=5 #optional
      - DB_POOL=5 #optional
      - NO_CHOWN= #optional
    volumes:
      - /path/to/appdata/config:/config
    ports:
      - 80:80
      - 443:443
    restart: unless-stopped

docker cli (click here for more info)

docker run -d \
  --name=mastodon \
  -e PUID=1000 \
  -e PGID=1000 \
  -e TZ=Etc/UTC \
  -e LOCAL_DOMAIN=example.com \
  -e REDIS_HOST=redis \
  -e REDIS_PORT=6379 \
  -e DB_HOST=db \
  -e DB_USER=mastodon \
  -e DB_NAME=mastodon \
  -e DB_PASS=mastodon \
  -e DB_PORT=5432 \
  -e ES_ENABLED=false \
  -e SECRET_KEY_BASE= \
  -e OTP_SECRET= \
  -e VAPID_PRIVATE_KEY= \
  -e VAPID_PUBLIC_KEY= \
  -e SMTP_SERVER=mail.example.com \
  -e SMTP_PORT=25 \
  -e SMTP_LOGIN= \
  -e SMTP_PASSWORD= \
  -e SMTP_FROM_ADDRESS=notifications@example.com \
  -e S3_ENABLED=false \
  -e WEB_DOMAIN=mastodon.example.com `#optional` \
  -e ES_HOST=es `#optional` \
  -e ES_PORT=9200 `#optional` \
  -e ES_USER=elastic `#optional` \
  -e ES_PASS=elastic `#optional` \
  -e S3_BUCKET= `#optional` \
  -e AWS_ACCESS_KEY_ID= `#optional` \
  -e AWS_SECRET_ACCESS_KEY= `#optional` \
  -e S3_ALIAS_HOST= `#optional` \
  -e SIDEKIQ_ONLY=false `#optional` \
  -e SIDEKIQ_QUEUE= `#optional` \
  -e SIDEKIQ_DEFAULT=false `#optional` \
  -e SIDEKIQ_THREADS=5 `#optional` \
  -e DB_POOL=5 `#optional` \
  -e NO_CHOWN= `#optional` \
  -p 80:80 \
  -p 443:443 \
  -v /path/to/appdata/config:/config \
  --restart unless-stopped \
  lscr.io/linuxserver/mastodon:latest

Parameters

Containers are configured using parameters passed at runtime (such as those above). These parameters are separated by a colon and indicate <external>:<internal> respectively. For example, -p 8080:80 would expose port 80 from inside the container to be accessible from the host's IP on port 8080 outside the container.

Ports (`-p`)

Parameter	Function
`80`	Port for web frontend
`443`	Port for web frontend

Environment Variables (`-e`)

Env	Function
`PUID=1000`	for UserID - see below for explanation
`PGID=1000`	for GroupID - see below for explanation
`TZ=Etc/UTC`	specify a timezone to use, see this list.
`LOCAL_DOMAIN=example.com`	This is the unique identifier of your server in the network. It cannot be safely changed later.
`REDIS_HOST=redis`	Redis server hostname
`REDIS_PORT=6379`	Redis port
`DB_HOST=db`	Postgres database hostname
`DB_USER=mastodon`	Postgres username
`DB_NAME=mastodon`	Postgres db name
`DB_PASS=mastodon`	Postgres password
`DB_PORT=5432`	Portgres port
`ES_ENABLED=false`	Enable or disable Elasticsearch (requires a separate ES instance)
`SECRET_KEY_BASE=`	Browser session secret. Changing it will break all active browser sessions.
`OTP_SECRET=`	MFA secret. Changing it will break two-factor authentication.
`VAPID_PRIVATE_KEY=`	Push notification private key. Changing it will break push notifications.
`VAPID_PUBLIC_KEY=`	Push notification public key. Changing it will break push notifications.
`SMTP_SERVER=mail.example.com`	SMTP server for email notifications
`SMTP_PORT=25`	SMTP server port
`SMTP_LOGIN=`	SMTP username
`SMTP_PASSWORD=`	SMTP password
`SMTP_FROM_ADDRESS=notifications@example.com`	From address for emails send from Mastodon
`S3_ENABLED=false`	Enable or disable S3 storage of uploaded files
`WEB_DOMAIN=mastodon.example.com`	This can be set if you want your server identifier to be different to the subdomain hosting Mastodon. See https://docs.joinmastodon.org/admin/config/#basic
`ES_HOST=es`	Elasticsearch server hostname
`ES_PORT=9200`	Elasticsearch port
`ES_USER=elastic`	Elasticsearch username
`ES_PASS=elastic`	Elasticsearch password
`S3_BUCKET=`	S3 bucket hostname
`AWS_ACCESS_KEY_ID=`	S3 bucket access key ID
`AWS_SECRET_ACCESS_KEY=`	S3 bucket secret access key
`S3_ALIAS_HOST=`	Alternate hostname for object fetching if you are front the S3 connections.
`SIDEKIQ_ONLY=false`	Only run the sidekiq service in this container instance. For large scale instances that need better queue handling.
`SIDEKIQ_QUEUE=`	The name of the sidekiq queue to run in this container. See notes.
`SIDEKIQ_DEFAULT=false`	Set to `true` on the main container if you're running additional sidekiq instances. It will run the `default` queue.
`SIDEKIQ_THREADS=5`	The number of threads for sidekiq to use. See notes.
`DB_POOL=5`	The size of the DB connection pool, must be at least the same as `SIDEKIQ_THREADS`. See notes.
`NO_CHOWN=`	Set to `true` to skip chown of /config on init. READ THE APPLICATION NOTES BEFORE SETTING THIS.

Volume Mappings (`-v`)

Volume	Function
`/config`	Contains all relevant configuration files.

Miscellaneous Options

Parameter	Function

Environment variables from files (Docker secrets)

You can set any environment variable from a file by using a special prepend FILE__.

As an example:

-e FILE__MYVAR=/run/secrets/mysecretvariable

Will set the environment variable MYVAR based on the contents of the /run/secrets/mysecretvariable file.

Umask for running applications

For all of our images we provide the ability to override the default umask settings for services started within the containers using the optional -e UMASK=022 setting. Keep in mind umask is not chmod it subtracts from permissions based on it's value it does not add. Please read up here before asking for support.

User / Group Identifiers

When using volumes (-v flags), permissions issues can arise between the host OS and the container, we avoid this issue by allowing you to specify the user PUID and group PGID.

Ensure any volume directories on the host are owned by the same user you specify and any permissions issues will vanish like magic.

In this instance PUID=1000 and PGID=1000, to find yours use id your_user as below:

id your_user

Example output:

uid=1000(your_user) gid=1000(your_user) groups=1000(your_user)

Docker Mods

We publish various Docker Mods to enable additional functionality within the containers. The list of Mods available for this image (if any) as well as universal mods that can be applied to any one of our images can be accessed via the dynamic badges above.

Support Info

Shell access whilst the container is running:
```
docker exec -it mastodon /bin/bash
```
To monitor the logs of the container in realtime:
```
docker logs -f mastodon
```

Container version number:

docker inspect -f '{{ index .Config.Labels "build_version" }}' mastodon

Image version number:

docker inspect -f '{{ index .Config.Labels "build_version" }}' lscr.io/linuxserver/mastodon:latest

Updating Info

Most of our images are static, versioned, and require an image update and container recreation to update the app inside. With some exceptions (ie. nextcloud, plex), we do not recommend or support updating apps inside the container. Please consult the Application Setup section above to see if it is recommended for the image.

Below are the instructions for updating containers:

Via Docker Compose

Update images:

All images:
```
docker-compose pull
```
Single image:
```
docker-compose pull mastodon
```

Update containers:

All containers:
```
docker-compose up -d
```
Single container:
```
docker-compose up -d mastodon
```

You can also remove the old dangling images:
```
docker image prune
```

Via Docker Run

Update the image:

docker pull lscr.io/linuxserver/mastodon:latest

Stop the running container:
```
docker stop mastodon
```
Delete the container:
```
docker rm mastodon
```
Recreate a new container with the same docker run parameters as instructed above (if mapped correctly to a host folder, your /config folder and settings will be preserved)
You can also remove the old dangling images:
```
docker image prune
```

Via Watchtower auto-updater (only use if you don't remember the original parameters)

Pull the latest image at its tag and replace it with the same env variables in one run:

docker run --rm \
  -v /var/run/docker.sock:/var/run/docker.sock \
  containrrr/watchtower \
  --run-once mastodon

You can also remove the old dangling images: docker image prune

!!! warning

We do not endorse the use of Watchtower as a solution to automated updates of existing Docker containers. In fact we generally discourage automated updates. However, this is a useful tool for one-time manual updates of containers where you have forgotten the original parameters. In the long term, we highly recommend using [Docker Compose](https://docs.linuxserver.io/general/docker-compose).

Image Update Notifications - Diun (Docker Image Update Notifier)

!!! tip

We recommend [Diun](https://crazymax.dev/diun/) for update notifications. Other tools that automatically update containers unattended are not recommended or supported.

Building locally

If you want to make local modifications to these images for development purposes or just to customize the logic:

git clone https://github.com/linuxserver/docker-mastodon.git
cd docker-mastodon
docker build \
  --no-cache \
  --pull \
  -t lscr.io/linuxserver/mastodon:latest .

The ARM variants can be built on x86_64 hardware using multiarch/qemu-user-static

docker run --rm --privileged multiarch/qemu-user-static:register --reset

Once registered you can define the dockerfile to use with -f Dockerfile.aarch64.

Versions

21.09.23: - Rebase to Alpine 3.18, migrate to s6v3.
25.05.23: - Adjust apk flags.
09.02.23: - Add Glitch branch.
09.01.23: - Updated nginx conf to fix bring inline with Mastodon configuration (fixes Elk integration).
19.12.22: - Support separate sidekiq queue instances.
05.11.22: - Initial Release.

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