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96 lines
2.6 KiB
Markdown
96 lines
2.6 KiB
Markdown
# Docker and YunoHost
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*Here is a small memo-documentation page on how to test/develop YunoHost with Docker.*
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*Find other ways to install YunoHost **[here](/install)**.*
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<img src="https://yunohost.org/images/docker.png" width=250>
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---
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## Install Docker
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**Pre-requisite** : A x86 computer under Ubuntu 12.04 (or above), or ArchLinux.
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Under Ubuntu :
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```bash
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# 12.04 only
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sudo apt-get update
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sudo apt-get install linux-image-generic-lts-raring linux-headers-generic-lts-raring
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sudo reboot
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# In every cases
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curl -s https://get.docker.io/ubuntu/ | sudo sh
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```
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Under ArchLinux :
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```bash
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sudo pacman -Sy docker
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```
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**Note:** You may have to start Docker's daemon manually (as root: `service docker start`, `systemctl start docker` or simply `docker -d`)
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---
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## Build the YunoHost container
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The following command will fetch a Debian Wheezy base image, clone the YunoHost's install script in it, and run it.
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```bash
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docker build -t yunohost:init https://raw.githubusercontent.com/YunoHost/Kremlin/master/docker/Dockerfile
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```
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You can check that the container is successfully built with the `docker images` command.
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---
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## Run the container
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```bash
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docker run -d -t yunohost:init /sbin/init
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```
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This command will start a container based on the `yunohost` image (tag `init`) that you just created.
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You will then be able to [postinstall](/postinstall) all this by entering the container's IP address (`172.17.0.2` by default) into a web browser.
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**Notice:** You may want to forward some of your container's ports, find more information or these pages:
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* http://docs.docker.io/reference/commandline/cli/#run
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* http://docs.docker.io/use/port_redirection/#port-redirection
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---
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## Advanced usage
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Some useful commands:
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### Snapshot container's state
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```bash
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docker commit <container_ID> yunohost:TheTagIWant
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# Example : docker commit 3e85317430db yunohost:03052014
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```
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### Assign an IP to a container
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```bash
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# You will need iptables, and to activate IP forwarding on your system
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iptables -t nat -A PREROUTING -d <IP.to.assign> -j DNAT --to-destination <container.IP>
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iptables -t nat -A POSTROUTING -s '<container.IP>/32' -o eth0 -j SNAT --to-source <IP.to.assign>
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# Be careful on the network interface (here eth0)
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```
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### Log in a YunoHost running container
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```bash
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# You will need:
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# * your container's ID
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docker ps -notrunc | grep yunohost
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# * your container's PID
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cat /var/lib/docker/execdriver/native/<container_ID>/pid
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# * `util-linux` package
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apt-get install util-linux || pacman -S util-linux
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# Run the nsenter command with the right parameters
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nsenter --target <PID> --mount --uts --ipc --net --pid /bin/bash
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```
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