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1# Docker
2
3[Docker](https://docs.docker.com/get-started/overview/) is an open platform for developing, shipping, and running applications
4
5## Install Docker
6
7Install [Docker](https://docs.docker.com/engine/install/), by following the instructions relevant to your OS / distribution, and start the service. For example on [Debian](https://docs.docker.com/engine/install/debian/):
8
9```bash
10# update your package lists
11sudo apt update
12# remove old versions
13sudo apt-get remove docker docker-engine docker.io containerd runc
14# install requirements
15sudo apt-get install apt-transport-https ca-certificates curl gnupg-agent software-properties-common
16# add docker's GPG signing key
17curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -
18# add the repository
19sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian $(lsb_release -cs) stable"
20# install docker engine
21sudo apt-get update
22sudo apt-get install docker-ce docker-ce-cli containerd.io
23# Start and enable Docker service
24sudo systemctl enable docker && sudo systemctl start docker
25# verify that Docker is properly configured
26sudo docker run hello-world
27```
28
29In order to run Docker commands as a non-root user, you must add the `docker` group to this user:
30
31```bash
32# Add docker group as secondary group
33sudo usermod -aG docker your-user
34# Reboot or logout
35# Then verify that Docker is properly configured, as "your-user"
36docker run hello-world
37```
38
39## Get and run a Shaarli image
40
41Shaarli images are available on [DockerHub](https://hub.docker.com/r/shaarli/shaarli/) `shaarli/shaarli`:
42
43- `latest`: latest branch (last release)
44- `stable`: stable branch (last release in previous major version)
45- `master`: master branch (development branch)
46
47These images are built automatically on DockerHub and rely on:
48
49- [Alpine Linux](https://www.alpinelinux.org/)
50- [PHP7-FPM](http://php-fpm.org/)
51- [Nginx](http://nginx.org/)
52
53Additional 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/).
54
55Here is an example of how to run Shaarli latest image using Docker:
56
57```bash
58# download the 'latest' image from dockerhub
59docker pull shaarli/shaarli
60
61# create persistent data volumes/directories on the host
62docker volume create shaarli-data
63docker volume create shaarli-cache
64
65# create a new container using the Shaarli image
66# --detach: run the container in background
67# --name: name of the created container/instance
68# --publish: map the host's :8000 port to the container's :80 port
69# --rm: automatically remove the container when it exits
70# --volume: mount persistent volumes in the container ($volume_name:$volume_mountpoint)
71docker run --detach \
72 --name myshaarli \
73 --publish 8000:80 \
74 --rm \
75 --volume shaarli-data:/var/www/shaarli/data \
76 --volume shaarli-cache:/var/www/shaarli/cache \
77 shaarli/shaarli:latest
78
79# verify that the container is running
80docker ps | grep myshaarli
81
82# to completely remove the container
83docker stop myshaarli # stop the running container
84docker ps | grep myshaarli # verify the container is no longer running
85docker ps -a | grep myshaarli # verify the container is stopped
86docker rm myshaarli # destroy the container
87docker ps -a | grep myshaarli # verify th container has been destroyed
88
89```
90
91After running `docker run` command, your Shaarli instance should be available on the host machine at [localhost:8000](http://localhost:8000). In order to access your instance through a reverse proxy, we recommend using our [Docker Compose](#docker-compose) build.
92
93## Docker Compose
94
95A [Compose file](https://docs.docker.com/compose/compose-file/) is a common format for defining and running multi-container Docker applications.
96
97A `docker-compose.yml` file can be used to run a persistent/autostarted shaarli service using [Docker Compose](https://docs.docker.com/compose/) or in a [Docker stack](https://docs.docker.com/engine/reference/commandline/stack_deploy/).
98
99Shaarli provides configuration file for Docker Compose, that will setup a Shaarli instance, a [Træfik](https://containo.us/traefik/) instance (reverse proxy) with [Let's Encrypt](https://letsencrypt.org/) certificates, a Docker network, and volumes for Shaarli data and Træfik TLS configuration and certificates.
100
101Download docker-compose from the [release page](https://docs.docker.com/compose/install/):
102
103```bash
104$ sudo curl -L "https://github.com/docker/compose/releases/download/1.26.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
105$ sudo chmod +x /usr/local/bin/docker-compose
106```
107
108To run Shaarli container and its reverse proxy, you can execute the following commands:
109
110```bash
111# create a new directory to store the configuration:
112$ mkdir shaarli && cd shaarli
113# Download the latest version of Shaarli's docker-compose.yml
114$ curl -L https://raw.githubusercontent.com/shaarli/Shaarli/latest/docker-compose.yml -o docker-compose.yml
115# Create the .env file and fill in your VPS and domain information
116# (replace <MY_SHAARLI_DOMAIN> and <MY_CONTACT_EMAIL> with your actual information)
117$ echo 'SHAARLI_VIRTUAL_HOST=shaarli.mydomain.org' > .env
118$ echo 'SHAARLI_LETSENCRYPT_EMAIL=admin@mydomain.org' >> .env
119# Pull the Docker images
120$ docker-compose pull
121# Run!
122$ docker-compose up -d
123```
124
125After a few seconds, you should be able to access your Shaarli instance at [https://shaarli.mydomain.org](https://shaarli.mydomain.org) (replace your own domain name).
126
127## Running dockerized Shaarli as a systemd service
128
129It is possible to start a dockerized Shaarli instance as a systemd service (systemd is the service management tool on several distributions). After installing Docker, use the following steps to run your shaarli container Shaarli to run on system start.
130
131As root, create `/etc/systemd/system/docker.shaarli.service`:
132
133```ini
134[Unit]
135Description=Shaarli Bookmark Manager Container
136After=docker.service
137Requires=docker.service
138
139
140[Service]
141Restart=always
142
143# Put any environment you want in an included file, like $host- or $domainname in this example
144EnvironmentFile=/etc/sysconfig/box-environment
145
146# It's just an example..
147ExecStart=/usr/bin/docker run \
148 -p 28010:80 \
149 --name ${hostname}-shaarli \
150 --hostname shaarli.${domainname} \
151 -v /srv/docker-volumes-local/shaarli-data:/var/www/shaarli/data:rw \
152 -v /etc/localtime:/etc/localtime:ro \
153 shaarli/shaarli:latest
154
155ExecStop=/usr/bin/docker rm -f ${hostname}-shaarli
156
157[Install]
158WantedBy=multi-user.target
159```
160
161```bash
162# reload systemd services definitions
163systemctl daemon-reload
164# start the servie and enable it a boot time
165systemctl enable docker.shaarli.service --now
166# verify that the service is running
167systemctl status docker.*
168# inspect system log if needed
169journalctl -f
170```
171
172
173
174## Docker cheatsheet
175
176```bash
177# pull/update an image
178$ docker pull shaarli/shaarli:release
179# run a container from an image
180$ docker run shaarli/shaarli:latest
181# list available images
182$ docker images ls
183# list running containers
184$ docker ps
185# list running AND stopped containers
186$ docker ps -a
187# run a command in a running container
188$ docker exec -ti <container-name-or-first-letters-of-id> bash
189# follow logs of a running container
190$ docker logs -f <container-name-or-first-letters-of-id>
191# delete unused images to free up disk space
192$ docker system prune --images
193# delete unused volumes to free up disk space (CAUTION all data in unused volumes will be lost)
194$ docker system prunt --volumes
195# delete unused containers
196$ docker system prune
197```
198
199
200## References
201
202- [Docker: using volumes](https://docs.docker.com/storage/volumes/)
203- [Dockerfile best practices](https://docs.docker.com/articles/dockerfile_best-practices/)
204- [Dockerfile reference](https://docs.docker.com/reference/builder/)
205- [DockerHub: GitHub automated build](https://docs.docker.com/docker-hub/github/)
206- [DockerHub: Repositories](https://docs.docker.com/userguide/dockerrepos/)
207- [DockerHub: Teams and organizations](https://docs.docker.com/docker-hub/orgs/)
208- [Get Docker CE for Debian](https://docs.docker.com/install/linux/docker-ce/debian/)
209- [Install Docker Compose](https://docs.docker.com/compose/install/)
210- [Interactive Docker training portal](https://www.katacoda.com/courses/docker/) on [Katakoda](https://www.katacoda.com/)
211- [Service management: Nginx in the foreground](http://nginx.org/en/docs/ngx_core_module.html#daemon)
212- [Service management: Using supervisord](https://docs.docker.com/articles/using_supervisord/)
213- [Volumes](https://docs.docker.com/storage/volumes/)
214- [Volumes](https://docs.docker.com/userguide/dockervolumes/)
215- [Where are Docker images stored?](http://blog.thoward37.me/articles/where-are-docker-images-stored/)
216- [docker create](https://docs.docker.com/engine/reference/commandline/create/)
217- [Docker Documentation](https://docs.docker.com/)
218- [docker exec](https://docs.docker.com/engine/reference/commandline/exec/)
219- [docker images](https://docs.docker.com/engine/reference/commandline/images/)
220- [docker logs](https://docs.docker.com/engine/reference/commandline/logs/)
221- [docker logs](https://docs.docker.com/engine/reference/commandline/logs/)
222- [Docker Overview](https://docs.docker.com/engine/docker-overview/)
223- [docker ps](https://docs.docker.com/engine/reference/commandline/ps/)
224- [docker pull](https://docs.docker.com/engine/reference/commandline/pull/)
225- [docker run](https://docs.docker.com/engine/reference/commandline/run/)
226- [docker-compose logs](https://docs.docker.com/compose/reference/logs/)
227- Træfik: [Getting Started](https://docs.traefik.io/), [Docker backend](https://docs.traefik.io/configuration/backends/docker/), [Let's Encrypt](https://docs.traefik.io/user-guide/docker-and-lets-encrypt/), [Docker image](https://hub.docker.com/_/traefik/) \ No newline at end of file