py-cookiecutter-templates/docker-compose/examples/hashicorpvault/README.md

# Vault Docker Compose files

Docker Compose files to spin up an instance of Vault.

# 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/hashicorpvault` 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 Vault with Docker Compose, otherwise head down to [Initial setup](#initial-setup) first.

## Environment
```
export COMPOSE_DIR='/opt/containers/hashicorpvault'
export COMPOSE_CTX='ux_vilnius'
export COMPOSE_PROJECT='vault-'"${COMPOSE_CTX}"
export COMPOSE_FILE="${COMPOSE_DIR}"'/docker-compose.yml'
export COMPOSE_OVERRIDE="${COMPOSE_DIR%/}"'/docker-compose.override.yml'
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'
```

## Build
We build the `vault` image locally. Our adjustment to the official image is simply adding `/tmp/vault` to it. See [build-context/vault/Dockerfile](build-context/vault/Dockerfile). We use `/tmp/vault` to bind-mount a dedicated ZFS dataset for the application's `tmpdir` location.

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

## Start

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

# 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
    ```
    zfs create -o mountpoint=/opt/docker-data 'zpool/docker-data'
    ```

* Container-specific datasets
    ```
    zfs create -p 'zpool/docker-data/vault-'"${COMPOSE_CTX}"'/vault/data/db'
    zfs create -p 'zpool/docker-data/vault-'"${COMPOSE_CTX}"'/vault/data/logs'
    zfs create -p 'zpool/docker-data/vault-'"${COMPOSE_CTX}"'/vault/config'
    ```
    When changing bind mount locations to real ones remember to also update `volumes:` in [docker-compose.yml](docker-compose.yml).

* Create subdirs
    ```
    mkdir -p '/opt/docker-data/vault-'"${COMPOSE_CTX}"'/vault/'{'.ssh','config','data','projects'}
    ```

* Change ownership
    ```
    chown -R 1000:1000 '/opt/docker-data/vault-${COMPOSE_CTX}/vault/data/'{*,.*}
    ```

## Additional files

Place the following files on target server. Use the directory structure at [build-context](build-context) as a guide, specifically at `docker-data`.

```
build-context/
├── docker-data
│   └── config
│       └── vault.cfg
├── Dockerfile
└── extras
```

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