A brief guide on getting starting using docker is given in [Docker 101](docker-101.md).
To learn more about user data and how to keep it across versions, please see [Upgrade and Migration](../Upgrade-and-migration.md).

## Get and run a Shaarli image

### DockerHub repository
The images can be found in the [`shaarli/shaarli`](https://hub.docker.com/r/shaarli/shaarli/)
repository.

### Available image tags
- `latest`: latest branch
- `master`: master branch
- `stable`: stable branch

The `latest`, `master` and `stable` images rely on:

- [Alpine Linux](https://www.alpinelinux.org/)
- [PHP7-FPM](http://php-fpm.org/)
- [Nginx](http://nginx.org/)

Additional Dockerfiles are provided for the `arm32v7` platform, relying on
[Linuxserver.io Alpine armhf
images](https://hub.docker.com/r/lsiobase/alpine.armhf/). These images must be
built using [`docker
build`](https://docs.docker.com/engine/reference/commandline/build/) on an
`arm32v7` machine or using an emulator such as
[qemu](https://resin.io/blog/building-arm-containers-on-any-x86-machine-even-dockerhub/).

### Download from Docker Hub
```shell
$ docker pull shaarli/shaarli

latest: Pulling from shaarli/shaarli
32716d9fcddb: Pull complete
84899d045435: Pull complete
4b6ad7444763: Pull complete
e0345ef7a3e0: Pull complete
5c1dd344094f: Pull complete
6422305a200b: Pull complete
7d63f861dbef: Pull complete
3eb97210645c: Pull complete
869319d746ff: Already exists
869319d746ff: Pulling fs layer
902b87aaaec9: Already exists
Digest: sha256:f836b4627b958b3f83f59c332f22f02fcd495ace3056f2be2c4912bd8704cc98
Status: Downloaded newer image for shaarli/shaarli:latest
```

### Create and start a new container from the image
```shell
# map the host's :8000 port to the container's :80 port
$ docker create -p 8000:80 shaarli/shaarli
d40b7af693d678958adedfb88f87d6ea0237186c23de5c4102a55a8fcb499101

# launch the container in the background
$ docker start d40b7af693d678958adedfb88f87d6ea0237186c23de5c4102a55a8fcb499101
d40b7af693d678958adedfb88f87d6ea0237186c23de5c4102a55a8fcb499101

# list active containers
$ docker ps
CONTAINER ID  IMAGE            COMMAND               CREATED         STATUS        PORTS                 NAMES
d40b7af693d6  shaarli/shaarli  /usr/bin/supervisor  15 seconds ago  Up 4 seconds  0.0.0.0:8000->80/tcp  backstabbing_galileo
```

### Stop and destroy a container
```shell
$ docker stop backstabbing_galileo  # those docker guys are really rude to physicists!
backstabbing_galileo

# check the container is stopped
$ docker ps
CONTAINER ID  IMAGE            COMMAND               CREATED         STATUS        PORTS                 NAMES

# list ALL containers
$ docker ps -a
CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS                      PORTS               NAMES
d40b7af693d6        shaarli/shaarli     /usr/bin/supervisor   5 minutes ago       Exited (0) 48 seconds ago                       backstabbing_galileo

# destroy the container
$ docker rm backstabbing_galileo  # let's put an end to these barbarian practices
backstabbing_galileo

$ docker ps -a
CONTAINER ID  IMAGE            COMMAND               CREATED         STATUS        PORTS                 NAMES
```

### Automatic builds
Docker users can start a personal instance from an
[autobuild image](https://hub.docker.com/r/shaarli/shaarli/).
For example to start a temporary Shaarli at ``localhost:8000``, and keep session
data (config, storage):

```shell
MY_SHAARLI_VOLUME=$(cd /path/to/shaarli/data/ && pwd -P)
docker run -ti --rm \
         -p 8000:80 \
         -v $MY_SHAARLI_VOLUME:/var/www/shaarli/data \
         shaarli/shaarli
```

### Volumes and data persistence
Data can be persisted by [using volumes](https://docs.docker.com/storage/volumes/).
Volumes allow to keep your data when renewing and/or updating container images:

```shell
# Create data volumes
$ docker volume create shaarli-data
$ docker volume create shaarli-cache

# Create and start a Shaarli container using these volumes to persist data
$ docker create \
    --name shaarli \
    -v shaarli-cache:/var/www/shaarli/cache \
    -v shaarli-data:/var/www/shaarli/data \
    -p 8000:80 \
    shaarli/shaarli:master
$ docker start shaarli
```