Ubuntu 13.04: docker

I am newbie to docker.

just referred to http://docs.docker.io/en/latest/installation/ubuntulinux/#ubuntu-raring

# tail -1 /etc/lsb-release ;uname –ri DISTRIB_DESCRIPTION="Ubuntu 13.04" 3.8.0-35-generic x86_64

I have disabled UFW.

# ufw status Status: inactive

install extra kernel to enable AUFS.

apt-get update;apt-get install linux-image-extra-`uname -r`

add a key

# sh -c "wget -qO- https://get.docker.io/gpg | apt-key add -" OK

add a dokcer repository.

# sh -c "echo deb http://get.docker.io/ubuntu docker main > /etc/ apt/sources.list.d/docker.list" # cat /etc/apt/sources.list.d/docker.list deb http://get.docker.io/ubuntu docker main

install docker

# apt-get update # apt-get install lxc-docker –y # dpkg -l lxc-docker Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name                  Version         Architecture    Description +++-=====================-===============-===============-=============================================== ii  lxc-docker            0.7.3           amd64           Linux container runtime

start a container.

root@ubuntu-1:~# docker run -i -t ubuntu /bin/bash Unable to find image 'ubuntu' (tag: latest) locally Pulling repository ubuntu 8dbd9e392a96: Download complete b750fe79269d: Download complete 27cf78414709: Download complete root@f14cf363cce8:/#   <- in the container

on the host

the container has been started by “lxc-start”.

root@ubuntu-1:~# ps aux | grep docker | grep -v grep root      5674  5.2  0.1 506956 12852 ?        Sl   21:18   0:08 /usr/bin/docker -d root      5745  0.0  0.0 188840  4580 pts/0    Sl+  21:19   0:00 docker run -i -t ubuntu /bin/bash root      5766  0.0  0.0  25576  1320 pts/6    Ss   21:19   0:00 lxc-start -n f14cf363cce861fdf0b4d8945623b85b07be96a0581d7b1c7bbf2adc25b718bd -f /var/lib/docker/containers/f14cf363cce861fdf0b4d8945623b85b07be96a0581d7b1c7bbf2adc25b718bd/config.lxc -- /.dockerinit -g 172.17.42.1 -i 172.17.0.2/16 -mtu 1500 -- /bin/bash

root@f14cf363cce8:/# tail -1 /etc/lsb-release DISTRIB_DESCRIPTION="Ubuntu 12.04 LTS" root@f14cf363cce8:/# uname -ri 3.8.0-35-generic x86_64 root@f14cf363cce8:/# exit  <- exit from the container exit root@ubuntu-1:~#

[ small app, hello world ]

confirm docker is running as daemon.

# ps aux | grep docker | grep -v grep root      5674  2.0  0.1 506956 12872 ?        Sl   21:18   0:08 /usr/bin/docker -d

download ubuntu image

root@ubuntu-1:~# docker pull ubuntu Pulling repository ubuntu 8dbd9e392a96: Download complete b750fe79269d: Download complete 27cf78414709: Download complete

run “/bin/echo hello world” in the ubuntu container.

# docker run ubuntu /bin/echo hello world hello world

start the container.

root@ubuntu-1:~# CONTAINER_ID=$(sudo docker run -d ubuntu /bin/sh -c "while true; do echo hello world; sleep 1; done") root@ubuntu-1:~# echo $CONTAINER_ID 799830d6cd7743d49a4e11d50434729a1972b7d54630932e035c71ae76c4f18f

dump the logs.

# docker logs $CONTAINER_ID hello world hello world hello world hello world <snip>

dump logs in real-time

root@ubuntu-1:~# docker attach $CONTAINER_ID hello world hello world hello world hello world ^Croot@ubuntu-1:~#

press Ctrl-C

after pressing Ctrl-C, the container stopped..

root@ubuntu-1:~# docker attach $CONTAINER_ID 2014/01/06 20:37:34 Impossible to attach to a stopped container, start it first

root@ubuntu-1:~# docker ps CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

start the container again.

root@ubuntu-1:~# CONTAINER_ID=$(sudo docker run -d ubuntu /bin/sh -c "while true; do echo hello world; sleep 1; done") root@ubuntu-1:~# docker ps CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS              PORTS               NAMES 9d3898d6ebc4        ubuntu:12.04        /bin/sh -c while tru   4 seconds ago       Up 4 seconds                            clever_heisenberg root@ubuntu-1:~# root@ubuntu-1:~# docker stop $CONTAINER_ID root@ubuntu-1:~# docker ps CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

# docker info Containers: 5 Images: 3 Driver: aufs Root Dir: /var/lib/docker/aufs Dirs: 13 root@ubuntu-1:/var/lib/docker# ls /var/lib/docker/ aufs  containers  graph  init  linkgraph.db  lxc-start-unconfined  repositories-aufs  volumes root@ubuntu-1:~# docker images REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE ubuntu              12.04               8dbd9e392a96        8 months ago        128 MB ubuntu              latest              8dbd9e392a96        8 months ago        128 MB ubuntu              precise             8dbd9e392a96        8 months ago        128 MB ubuntu              12.10               b750fe79269d        9 months ago        175.3 MB ubuntu              quantal             b750fe79269d        9 months ago        175.3 MB base                latest              b750fe79269d        9 months ago        175.3 MB base                ubuntu-12.10        b750fe79269d        9 months ago        175.3 MB base                ubuntu-quantal      b750fe79269d        9 months ago        175.3 MB base                ubuntu-quantl       b750fe79269d        9 months ago        175.3 MB

[ Python web app container ( hello flask web app image ) ]

download shykes/pybuilder dokcer image.

# docker pull shykes/pybuilder

# docker images -tree tq8dbd9e392a96 Virtual Size: 128 MB Tags: ubuntu:12.04, ubuntu:latest, ubuntu:precise mq27cf78414709 Virtual Size: 175.3 MB  mqb750fe79269d Virtual Size: 175.3 MB Tags: ubuntu:12.10, ubuntu:quantal, base:latest, base:ubuntu-12.10, base:ubuntu-quantal, base:ubuntu-quantl    mq127455573097 Virtual Size: 175.3 MB      mq3c0e53c2b843 Virtual Size: 271.8 MB        mq7f01ac3ad392 Virtual Size: 311.8 MB          mq938e27a84c9a Virtual Size: 362.7 MB            mq20d238b4f7f3 Virtual Size: 550.4 MB              mqc4c36c680c00 Virtual Size: 550.4 MB                mq370fed31f16a Virtual Size: 550.4 MB Tags: shykes/pybuilder:latest

build python web app container.

root@ubuntu-1:~# URL=http://github.com/shykes/helloflask/archive/master.tar.gz root@ubuntu-1:~# BUILD_JOB=$(sudo docker run -d -t shykes/pybuilder:latest /usr/local/bin/buildapp $URL) root@ubuntu-1:~# sudo docker attach -sig-proxy=false $BUILD_JOB   Creating /usr/local/lib/python2.7/dist-packages/setuptools.pth Successfully installed Flask Jinja2 Werkzeug distribute Cleaning up... root@ubuntu-1:~# docker ps -a CONTAINER ID        IMAGE                     COMMAND                CREATED             STATUS              PORTS               NAMES e6aecbe95dbe        shykes/pybuilder:latest   /usr/local/bin/build   2 minutes ago       Exit 0                                  loving_feynmann

create a new container.

root@ubuntu-1:~# BUILD_IMG=$(sudo docker commit $BUILD_JOB _/builds/github.com/shykes/helloflask/master) root@ubuntu-1:~# echo $BUILD_IMG 3a942d759ac8bf6133d79bad56c2c9c9c2c2b285fea02963a6186c9ea4270891 root@ubuntu-1:~# WEB_WORKER=$(sudo docker run -d -p 5000 $BUILD_IMG /usr/local/bin/runapp) root@ubuntu-1:~# echo $WEB_WORKER 0d74e6460cd99a6d8d6f4bf18fecd3def2be83c5af74cb307550ffe248afcf5b

running?

root@ubuntu-1:~# docker ps –a CONTAINER ID        IMAGE                                                 COMMAND                CREATED             STATUS              PORTS                     NAMES 0d74e6460cd9        _/builds/github.com/shykes/helloflask/master:latest   /usr/local/bin/runap   2 minutes ago       Up 2 minutes        0.0.0.0:49153->5000/tcp   naughty_wright

root@ubuntu-1:~# docker logs $WEB_WORKER * Running on http://0.0.0.0:5000/

root@ubuntu-1:~# WEB_PORT=$(sudo docker port $WEB_WORKER 5000 | awk -F: '{ print $2 }') root@ubuntu-1:~# echo $WEB_PORT 49153 root@ubuntu-1:~# docker port $WEB_WORKER Usage: docker port CONTAINER PRIVATE_PORT Lookup the public-facing port which is NAT-ed to PRIVATE_PORT root@ubuntu-1:~# docker port $WEB_WORKER 5000 0.0.0.0:49153

flask app is running in the container.

# curl http://127.1:49153 Hello world!

root@ubuntu-1:~# ps aux | grep docker | grep -v grep root      5674  0.4  0.0 639628 11464 ?        Sl   21:18   0:20 /usr/bin/docker -d root      7326  0.0  0.0  25576  1324 ?        Ss   22:25   0:00 lxc-start -n 0d74e6460cd99a6d8d6f4bf18fecd3def2be83c5af74cb307550ffe248afcf5b -f /var/lib/docker/containers/0d74e6460cd99a6d8d6f4bf18fecd3def2be83c5af74cb307550ffe248afcf5b/config.lxc -- /.dockerinit -g 172.17.42.1 -i 172.17.0.8/16 -mtu 1500 -- /usr/local/bin/runapp

stop the container.

root@ubuntu-1:~# docker ps CONTAINER ID        IMAGE                                                 COMMAND                CREATED             STATUS              PORTS                     NAMES 0d74e6460cd9        _/builds/github.com/shykes/helloflask/master:latest   /usr/local/bin/runap   9 minutes ago       Up 9 minutes        0.0.0.0:49153->5000/tcp   naughty_wright root@ubuntu-1:~# docker stop 0d74e6460cd9 0d74e6460cd9 root@ubuntu-1:~#

nnn, I need to study docker more, I’m getting lost about some of docker options..