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ergo/distrib/docker/README.md

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# Ergo Docker
This folder holds Ergo's Docker compose file. The Dockerfile is in the root
directory. Ergo is published automatically to the GitHub Container Registry at
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[ghcr.io/ergochat/ergo](https://ghcr.io/ergochat/ergo).
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Most users should use either the `stable` tag (corresponding to the
`stable` branch in git, which tracks the latest stable release), or
a tag corresponding to a tagged version (e.g. `v2.8.0`). The `master`
tag corresponds to the `master` branch, which is not recommended for
production use. The `latest` tag is not recommended.
## Quick start
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The Ergo docker image is designed to work out of the box - it comes with a
usable default config and will automatically generate self-signed TLS
certificates. To get a working ircd, all you need to do is run the image and
expose the ports:
```shell
docker run --init --name ergo -d -p 6667:6667 -p 6697:6697 ghcr.io/ergochat/ergo:stable
```
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This will start Ergo and listen on ports 6667 (plain text) and 6697 (TLS).
The first time Ergo runs it will create a config file with a randomised
oper password. This is output to stdout, and you can view it with the docker
logs command:
```shell
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# Assuming your container is named `ergo`; use `docker container ls` to
# find the name if you're not sure.
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docker logs ergo
```
You should see a line similar to:
```
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Oper username:password is admin:cnn2tm9TP3GeI4vLaEMS
```
We recommend the use of `--init` (`init: true` in docker-compose) to solve an
edge case involving unreaped zombie processes when Ergo's script API is used
for authentication or IP validation. For more details, see
[krallin/tini#8](https://github.com/krallin/tini/issues/8).
## Persisting data
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Ergo has a persistent data store, used to keep account details, channel
registrations, and so on. To persist this data across restarts, you can mount
a volume at /ircd.
For example, to create a new docker volume and then mount it:
```shell
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docker volume create ergo-data
docker run --init -d -v ergo-data:/ircd -p 6667:6667 -p 6697:6697 ghcr.io/ergochat/ergo:stable
```
Or to mount a folder from your host machine:
```shell
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mkdir ergo-data
docker run --init -d -v $(PWD)/ergo-data:/ircd -p 6667:6667 -p 6697:6697 ghcr.io/ergochat/ergo:stable
```
## Customising the config
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Ergo's config file is stored at /ircd/ircd.yaml. If the file does not
exist, the default config will be written out. You can copy the config from
the container, edit it, and then copy it back:
```shell
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# Assuming that your container is named `ergo`, as above.
docker cp ergo:/ircd/ircd.yaml .
vim ircd.yaml # edit the config to your liking
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docker cp ircd.yaml ergo:/ircd/ircd.yaml
```
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You can use the `/rehash` command to make Ergo reload its config, or
send it the HUP signal:
```shell
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docker kill -s SIGHUP ergo
```
## Using custom TLS certificates
TLS certs will by default be read from /ircd/tls.crt, with a private key
in /ircd/tls.key. You can customise this path in the ircd.yaml file if
you wish to mount the certificates from another volume. For information
on using Let's Encrypt certificates, see
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[this manual entry](https://github.com/ergochat/ergo/blob/master/docs/MANUAL.md#using-valid-tls-certificates).
## Using docker-compose
This folder contains a sample docker-compose file which can be used
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to start an Ergo instance with ports exposed and data persisted in
a docker volume. Simply download the file and then bring it up:
```shell
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curl -O https://raw.githubusercontent.com/ergochat/ergo/master/distrib/docker/docker-compose.yml
docker-compose up -d
```
## Building
If you wish to manually build the docker image, you need to do so from
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the root of the Ergo repository (not the `distrib/docker` directory):
```shell
docker build .
```