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451 lines
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451 lines
13 KiB
Markdown
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[](https://github.com/processone/ejabberd/tags)
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[](https://github.com/processone/ejabberd/pkgs/container/ejabberd)
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`ejabberd` Container Image
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==========================
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[ejabberd][home] is an open-source,
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robust, scalable and extensible realtime platform built using [Erlang/OTP][erlang],
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that includes [XMPP][xmpp] Server, [MQTT][mqtt] Broker and [SIP][sip] Service.
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[home]: https://ejabberd.im/
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[erlang]: https://www.erlang.org/
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[xmpp]: https://xmpp.org/
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[mqtt]: https://mqtt.org/
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[sip]: https://en.wikipedia.org/wiki/Session_Initiation_Protocol
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This document explains how to use the `ejabberd` container image available in
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[ghcr.io/processone/ejabberd](https://github.com/processone/ejabberd/pkgs/container/ejabberd),
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built using the files in `.github/container/`.
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This image is based in Alpine 3.17, includes Erlang/OTP 25.3 and Elixir 1.14.4.
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Alternatively, there is also the `ecs` container image available in
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[docker.io/ejabberd/ecs](https://hub.docker.com/r/ejabberd/ecs/),
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built using the
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[docker-ejabberd/ecs](https://github.com/processone/docker-ejabberd/tree/master/ecs)
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repository.
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Check the [differences between `ejabberd` and `ecs` images](https://github.com/processone/docker-ejabberd/blob/master/ecs/HUB-README.md#alternative-image-in-github).
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If you are using a Windows operating system, check the tutorials mentioned in
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[ejabberd Docs > Docker Image](https://docs.ejabberd.im/admin/installation/#docker-image).
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Start ejabberd
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==============
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## With default configuration
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Start ejabberd in a new container:
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```bash
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docker run --name ejabberd -d -p 5222:5222 ghcr.io/processone/ejabberd
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```
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That runs the container as a daemon,
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using ejabberd default configuration file and XMPP domain "localhost".
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Stop the running container:
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```bash
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docker stop ejabberd
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```
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Restart the stopped ejabberd container:
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```bash
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docker restart ejabberd
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```
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## Start with Erlang console attached
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Start ejabberd with an Erlang console attached using the `live` command:
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```bash
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docker run --name ejabberd -it -p 5222:5222 ghcr.io/processone/ejabberd live
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```
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That uses the default configuration file and XMPP domain "localhost".
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## Start with your configuration and database
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Pass a configuration file as a volume
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and share the local directory to store database:
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```bash
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mkdir database
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chown ejabberd database
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cp ejabberd.yml.example ejabberd.yml
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docker run --name ejabberd -it \
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-v $(pwd)/ejabberd.yml:/opt/ejabberd/conf/ejabberd.yml \
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-v $(pwd)/database:/opt/ejabberd/database \
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-p 5222:5222 ghcr.io/processone/ejabberd live
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```
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Notice that ejabberd runs in the container with an account named `ejabberd`,
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and the volumes you mount must grant proper rights to that account.
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Next steps
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==========
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## Register the administrator account
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The default ejabberd configuration does not grant admin privileges
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to any account,
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you may want to register a new account in ejabberd
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and grant it admin rights.
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Register an account using the `ejabberdctl` script:
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```bash
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docker exec -it ejabberd ejabberdctl register admin localhost passw0rd
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```
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Then edit conf/ejabberd.yml and add the ACL as explained in
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[ejabberd Docs: Administration Account](https://docs.ejabberd.im/admin/installation/#administration-account)
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## Check ejabberd log files
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Check the content of the log files inside the container,
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even if you do not put it on a shared persistent drive:
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```bash
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docker exec -it ejabberd tail -f logs/ejabberd.log
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```
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## Inspect the container files
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The container uses Alpine Linux. Start a shell inside the container:
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```bash
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docker exec -it ejabberd sh
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```
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## Open ejabberd debug console
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Open an interactive debug Erlang console attached to a running ejabberd in a running container:
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```bash
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docker exec -it ejabberd ejabberdctl debug
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```
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## CAPTCHA
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ejabberd includes two example CAPTCHA scripts.
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If you want to use any of them, first install some additional required libraries:
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```bash
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docker exec --user root ejabberd apk add imagemagick ghostscript-fonts bash
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```
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Now update your ejabberd configuration file, for example:
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```bash
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docker exec -it ejabberd vi conf/ejabberd.yml
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```
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and add this option:
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```yaml
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captcha_cmd: /opt/ejabberd-22.04/lib/captcha.sh
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```
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Finally, reload the configuration file or restart the container:
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```bash
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docker exec ejabberd ejabberdctl reload_config
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```
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If the CAPTCHA image is not visible, there may be a problem generating it
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(the ejabberd log file may show some error message);
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or the image URL may not be correctly detected by ejabberd,
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in that case you can set the correct URL manually, for example:
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```yaml
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captcha_url: https://localhost:5443/captcha
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```
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For more details about CAPTCHA options, please check the
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[CAPTCHA](https://docs.ejabberd.im/admin/configuration/basic/#captcha)
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documentation section.
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Advanced Container Configuration
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================================
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## Ports
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This container image exposes the ports:
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- `5222`: The default port for XMPP clients.
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- `5269`: For XMPP federation. Only needed if you want to communicate with users on other servers.
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- `5280`: For admin interface.
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- `5443`: With encryption, used for admin interface, API, CAPTCHA, OAuth, Websockets and XMPP BOSH.
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- `1883`: Used for MQTT
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- `4369-4399`: EPMD and Erlang connectivity, used for `ejabberdctl` and clustering
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- `5210`: Erlang connectivity when `ERL_DIST_PORT` is set, alternative to EPMD
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## Volumes
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ejabberd produces two types of data: log files and database spool files (Mnesia).
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This is the kind of data you probably want to store on a persistent or local drive (at least the database).
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The volumes you may want to map:
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- `/opt/ejabberd/conf/`: Directory containing configuration and certificates
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- `/opt/ejabberd/database/`: Directory containing Mnesia database.
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You should back up or export the content of the directory to persistent storage
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(host storage, local storage, any storage plugin)
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- `/opt/ejabberd/logs/`: Directory containing log files
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- `/opt/ejabberd/upload/`: Directory containing uploaded files. This should also be backed up.
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All these files are owned by `ejabberd` user inside the container.
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It's possible to install additional ejabberd modules using volumes,
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[this comment](https://github.com/processone/docker-ejabberd/issues/81#issuecomment-1036115146)
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explains how to install an additional module using docker-compose.
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## Commands on start
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The ejabberdctl script reads the `CTL_ON_CREATE` environment variable
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the first time the container is started,
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and reads `CTL_ON_START` every time the container is started.
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Those variables can contain one ejabberdctl command,
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or several commands separated with the blankspace and `;` characters.
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Example usage (or check the [full example](#customized-example)):
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```yaml
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environment:
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- CTL_ON_CREATE=register admin localhost asd
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- CTL_ON_START=stats registeredusers ;
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check_password admin localhost asd ;
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status
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```
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## Clustering
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When setting several containers to form a
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[cluster of ejabberd nodes](https://docs.ejabberd.im/admin/guide/clustering/),
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each one must have a different
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[Erlang Node Name](https://docs.ejabberd.im/admin/guide/security/#erlang-node-name)
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and the same
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[Erlang Cookie](https://docs.ejabberd.im/admin/guide/security/#erlang-cookie).
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For this you can either:
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- edit `conf/ejabberdctl.cfg` and set variables `ERLANG_NODE` and `ERLANG_COOKIE`
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- set the environment variables `ERLANG_NODE_ARG` and `ERLANG_COOKIE`
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Example to connect a local `ejabberdctl` to a containerized ejabberd:
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1. When creating the container, export port 5210, and set `ERLANG_COOKIE`:
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```
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docker run --name ejabberd -it \
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-e ERLANG_COOKIE=`cat $HOME/.erlang.cookie` \
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-p 5210:5210 -p 5222:5222 \
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ghcr.io/processone/ejabberd
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```
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2. Set `ERL_DIST_PORT=5210` in ejabberdctl.cfg of container and local ejabberd
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3. Restart the container
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4. Now use `ejabberdctl` in your local ejabberd deployment
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To connect using a local `ejabberd` script:
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```
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ERL_DIST_PORT=5210 _build/dev/rel/ejabberd/bin/ejabberd ping
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```
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Example using environment variables (see full example [docker-compose.yml](https://github.com/processone/docker-ejabberd/issues/64#issuecomment-887741332)):
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```yaml
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environment:
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- ERLANG_NODE_ARG=ejabberd@node7
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- ERLANG_COOKIE=dummycookie123
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```
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Build a Container Image
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=======================
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This container image includes ejabberd as a standalone OTP release built using Elixir.
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That OTP release is configured with:
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- `mix.exs`: Customize ejabberd release
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- `vars.config`: ejabberd compilation configuration options
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- `config/runtime.exs`: Customize ejabberd paths
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- `ejabberd.yml.template`: ejabberd default config file
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## Direct build
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Build ejabberd Community Server container image from ejabberd master git repository:
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```bash
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docker buildx build \
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-t personal/ejabberd \
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-f .github/container/Dockerfile \
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.
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```
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## Podman build
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It's also possible to use podman instead of docker, just notice:
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- `EXPOSE 4369-4399` port range is not supported, remove that in Dockerfile
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- It mentions that `healthcheck` is not supported by the Open Container Initiative image format
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- If you want to start with command `live`, add environment variable `EJABBERD_BYPASS_WARNINGS=true`
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```bash
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podman build \
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-t ejabberd \
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-f .github/container/Dockerfile \
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.
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podman run --name eja1 -d -p 5222:5222 localhost/ejabberd
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podman exec eja1 ejabberdctl status
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podman exec -it eja1 sh
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podman stop eja1
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```
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## Package build for `arm64`
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By default, `.github/container/Dockerfile` builds this container by directly compiling ejabberd,
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it is a fast and direct method.
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However, a problem with QEMU prevents building the container in QEMU using Erlang/OTP 25
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for the `arm64` architecture.
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Providing `--build-arg METHOD=package` is an alternate method to build the container
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used by the Github Actions workflow that provides `amd64` and `arm64` container images.
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It first builds an ejabberd binary package, and later installs it in the image.
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That method avoids using QEMU, so it can build `arm64` container images, but is extremely
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slow the first time it's used, and consequently not recommended for general use.
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In this case, to build the ejabberd container image for arm64 architecture:
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```bash
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docker buildx build \
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--build-arg METHOD=package \
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--platform linux/arm64 \
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-t personal/ejabberd:$VERSION \
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-f .github/container/Dockerfile \
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.
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```
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Composer Examples
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=================
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## Minimal Example
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This is the barely minimal file to get a usable ejabberd.
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Store it as `docker-compose.yml`:
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```yaml
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services:
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main:
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image: ghcr.io/processone/ejabberd
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container_name: ejabberd
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ports:
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- "5222:5222"
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- "5269:5269"
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- "5280:5280"
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- "5443:5443"
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```
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Create and start the container with the command:
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```bash
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docker-compose up
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```
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## Customized Example
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This example shows the usage of several customizations:
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it uses a local configuration file,
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stores the mnesia database in a local path,
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registers an account when it's created,
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and checks the number of registered accounts every time it's started.
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Download or copy the ejabberd configuration file:
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```bash
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wget https://raw.githubusercontent.com/processone/ejabberd/master/ejabberd.yml.example
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mv ejabberd.yml.example ejabberd.yml
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```
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Create the database directory and allow the container access to it:
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```bash
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mkdir database
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sudo chown 9000:9000 database
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```
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Now write this `docker-compose.yml` file:
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```yaml
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version: '3.7'
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services:
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main:
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image: ghcr.io/processone/ejabberd
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container_name: ejabberd
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environment:
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- CTL_ON_CREATE=register admin localhost asd
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- CTL_ON_START=registered_users localhost ;
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status
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ports:
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- "5222:5222"
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- "5269:5269"
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- "5280:5280"
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- "5443:5443"
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volumes:
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- ./ejabberd.yml:/opt/ejabberd/conf/ejabberd.yml:ro
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- ./database:/opt/ejabberd/database
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```
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## Clustering Example
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In this example, the main container is created first.
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Once it is fully started and healthy, a second container is created,
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and once ejabberd is started in it, it joins the first one.
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An account is registered in the first node when created,
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and it should exist in the second node after join.
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Notice that in this example the main container does not have access
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to the exterior; the replica exports the ports and can be accessed.
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```yaml
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version: '3.7'
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services:
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main:
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image: ghcr.io/processone/ejabberd
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container_name: ejabberd
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environment:
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- ERLANG_NODE_ARG=ejabberd@main
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- ERLANG_COOKIE=dummycookie123
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- CTL_ON_CREATE=register admin localhost asd
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replica:
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image: ghcr.io/processone/ejabberd
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container_name: replica
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depends_on:
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main:
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condition: service_healthy
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ports:
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- "5222:5222"
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- "5269:5269"
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- "5280:5280"
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- "5443:5443"
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environment:
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- ERLANG_NODE_ARG=ejabberd@replica
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- ERLANG_COOKIE=dummycookie123
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- CTL_ON_CREATE=join_cluster ejabberd@main
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- CTL_ON_START=registered_users localhost ;
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status
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```
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