# Rundeck Docker Compose files

Docker Compose files to spin up an instance of Rundeck.

# How to run

Add a `COMPOSE_ENV` file and save its location as a shell variable along with the location where this repo lives, here for example `/opt/containers/rundeck` plus all other variables. At [env/fqdn_context.env.example](env/fqdn_context.env.example) you'll find an example environment file.

When everything's ready start Rundeck with Docker Compose, otherwise head down to [Initial setup](#initial-setup) first.

## Environment

```
export COMPOSE_DIR='/opt/containers/rundeck'
export COMPOSE_CTX='ux_vilnius'
export COMPOSE_PROJECT='rundeck-'"${COMPOSE_CTX}"
export COMPOSE_FILE="${COMPOSE_DIR}"'/compose.yaml'
export COMPOSE_ENV=<add accordingly>
```

## Context

On your deployment machine create the necessary Docker context to connect to and control the Docker daemon on whatever target host you'll be using, for example:
```
docker context create fully.qualified.domain.name --docker 'host=ssh://root@fully.qualified.domain.name'
```

## Pull

Pull images from Docker Hub verbatim.

```
docker compose --project-name "${COMPOSE_PROJECT}" --file "${COMPOSE_FILE}" --env-file "${COMPOSE_ENV}" --profile 'full' pull
```

## Copy to target

Copy images to target Docker host, that is assuming you deploy to a machine that itself has no network route to reach Docker Hub or your private registry of choice. Copying in its simplest form involves a local `docker save` and a remote `docker load`. Consider the helper mini-project [quico.space/Quico/copy-docker](https://quico.space/Quico/copy-docker) where [copy-docker.sh](https://quico.space/Quico/copy-docker/src/branch/main/copy-docker.sh) allows the following workflow:

```
images="$(docker compose --project-name "${COMPOSE_PROJECT}" --file "${COMPOSE_FILE}" --env-file "${COMPOSE_ENV}" --profile 'full' config | grep -Pi -- 'image:' | awk '{print $2}' | sort | uniq)"
while IFS= read -u 10 -r image; do
    copy-docker "${image}" fully.qualified.domain.name
done 10<<<"${images}"
```

## Start

```
docker --context 'fully.qualified.domain.name' compose --project-name "${COMPOSE_PROJECT}" --file "${COMPOSE_FILE}" --env-file "${COMPOSE_ENV}" --profile 'full' up --detach
```

## Clean-up

```
docker --context 'fully.qualified.domain.name' system prune -af
docker system prune -af
```

# Initial setup

We're assuming you run Docker Compose workloads with ZFS-based bind mounts. ZFS management, creating a zpool and setting adequate properties for its datasets is out of scope of this document.

## Datasets

Create ZFS datasets and set permissions as needed.

* Parent dateset
    ```
    export "$(grep -Pi -- '^CONTEXT=' "${COMPOSE_ENV}")"
    zfs create -o canmount=off zpool/data/opt
    zfs create -o mountpoint=/opt/docker-data zpool/data/opt/docker-data
    ```

* Container-specific datasets
    ```
    zfs create -p 'zpool/data/opt/docker-data/rundeck-'"${CONTEXT}"'/rundeck/config'
    zfs create -p 'zpool/data/opt/docker-data/rundeck-'"${CONTEXT}"'/rundeck/data'
    zfs create -p 'zpool/data/opt/docker-data/rundeck-'"${CONTEXT}"'/postgres/data'
    ```

* Change ownership
    ```
    chown -R 999 '/opt/docker-data/rundeck-'"${CONTEXT}"'/postgres/'*
    chown -R 1000 '/opt/docker-data/rundeck-'"${CONTEXT}"'/rundeck/'*
    ```

## Additional files

### Rundeck settings in `realm.properties`

At the very least override Rundeck's default `realm.properties` file with one of your own and set a username and a password for local login. Default credentials will otherwise be `admin:admin`. Per [Rundeck's manual on Jetty and JAAS authentication section "PropertyFileLoginModule"](https://docs.rundeck.com/docs/administration/security/authentication.html#propertyfileloginmodule) you're going to need Rundeck's `rundeck.war` file to create a bcrypt hash for your password. Run the official Rundeck Docker image in a throwaway container like so where `rundeck/rundeck:4.13.0` is an example version you want to use:
```
docker run \
    --rm \
    --tty \
    --interactive \
    --entrypoint bash \
    rundeck/rundeck:5.9.0 \
    -c 'java -jar /home/rundeck/rundeck.war --encryptpwd Jetty'
```
This will download `rundeck/rundeck:5.9.0` if needed and open up something along the lines of:
```
Required values are marked with: * 
Username (Optional, but necessary for Crypt encoding):
```
Type your desired username, type `<Enter>` and then your plain text password followed by `<Enter>` again. The whole exchange may look like this:
```
Required values are marked with: * 
Username (Optional, but necessary for Crypt encoding):
my-username
*Value To Encrypt (The text you want to encrypt):
t0psecr3t
          
==ENCRYPTED OUTPUT==
bcrypt: BCRYPT:$2a$10$jMWQvKbjpmBrKdA0Qi0/n.UvHot1F7Cvf7/Avlv9afknHpbvT6j7y
obfuscate: OBF:1z0f18qk1xtp1vgv1t331vfz1xtt18qq1z0f
md5: MD5:962aefc8c283c13e13d9c990dafdfba9
crypt: CRYPT:myS5y0c4wMQts
```
Put a single line into an otherwise empty `/opt/docker-data/rundeck-'"${COMPOSE_CTX}"'/rundeck/config/realm.properties`:
```
my-username: BCRYPT:$2a$10$jMWQvKbjpmBrKdA0Qi0/n.UvHot1F7Cvf7/Avlv9afknHpbvT6j7y,user,admin
```
The account `my-username` will have roles `user` and `admin` and it'll be the only existing account when Rundeck starts.

### SSH `known_hosts` file

Place an empty `known_hosts` file at `/opt/docker-data/rundeck-'"${COMPOSE_CTX}"'/rundeck/config/known_hosts`. Feel free to optionally prefill it with SSH public host keys.

When done head back up to [How to run](#how-to-run).

# Development

## Conventional commits

This project uses [Conventional Commits](https://www.conventionalcommits.org/) for its commit messages.

### Commit types

Commit _types_ besides `fix` and `feat` are:

- `refactor`: Keeping functionality while streamlining or otherwise improving function flow
- `docs`: Documentation for project or components

### Commit scopes

The following _scopes_ are known for this project. A Conventional Commits commit message may optionally use one of the following scopes or none:

- `rundeck`: A change to how the `rundeck` service component works
- `postgres`: A change to how the `postgres` service component works
- `build`: Build-related changes such as `Dockerfile` fixes and features.
- `mount`: Volume or bind mount-related changes.
- `net`: Networking, IP addressing, routing changes
- `meta`: Affects the project's repo layout, file names etc.