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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.

Application Setup

To generate keys for SECRET_KEY_BASE & OTP_SECRET run docker run --rm -it -w /app/www --entrypoint rake lscr.io/linuxserver/mastodon secret once for each.

To generate keys for VAPID_PRIVATE_KEY & VAPID_PUBLIC_KEY run docker run --rm -it -w /app/www --entrypoint rake lscr.io/linuxserver/mastodon mastodon:webpush:generate_vapid_key

To use tootctl you can run something like docker exec -it -w /app/www mastodon bin/tootctl <command>

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.

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=America/New_York
      - 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
    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=America/New_York \
  -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` \
  -p 80:80 \
  -p 443:443 \
  -v /path/to/appdata/config:/config \
  --restart unless-stopped \
  lscr.io/linuxserver/mastodon:latest

Parameters

Docker images 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=America/New_York`	Specify a timezone to use EG America/New_York
`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.

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__PASSWORD=/run/secrets/mysecretpassword

Will set the environment variable PASSWORD based on the contents of the /run/secrets/mysecretpassword 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 user as below:

  $ id username
    uid=1000(dockeruser) gid=1000(dockergroup) groups=1000(dockergroup)

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

Versions

05.11.22: - Initial Release.

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