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asm89
/
@iam_asm89
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Dependencies
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?
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?
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?
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Deployment
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Linux containers
Run
everywhere
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Linux containers
Run
everything
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What is
a linux
container?
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Lightweight VM
● Own process space
● Own network interface
● Can run stuff as root
● Can have its own /sbin/init
“machine container”
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Lightweight VM
● Own process space
● Own network interface
● Can run stuff as root
● Can have its own /sbin/init
“machine container”
● Not having its own /sbin/init
● Isolated processes
● Share kernel with the host
“application container”
Chroot on steroids
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VM vs Container
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$ ps aux | wc -l
174
$ docker run -it ubuntu bash
root@86f8213d57e0:/# ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START
TIME COMMAND
root 1 4.0 0.0 18152 1856 ? Ss 23:05 0:00 bash
root 9 0.0 0.0 15568 1148 ? R+ 23:05 0:00 ps aux
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Docker
101
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$ sudo apt-get update
$ sudo apt-get install docker.io
$ sudo ln -sf /usr/bin/docker.io /usr/local/bin/docker
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$ docker pull ubuntu
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$ docker images | grep ubuntu
ubuntu 13.10 5e019ab7bf6d 3 weeks ago 180 MB
ubuntu saucy 5e019ab7bf6d 3 weeks ago 180 MB
ubuntu precise 74fe38d11401 3 weeks ago 209.4 MB
ubuntu 12.04 74fe38d11401 3 weeks ago 209.4 MB
ubuntu 12.10 a7cf8ae4e998 3 weeks ago 171.2 MB
ubuntu quantal a7cf8ae4e998 3 weeks ago 171.2 MB
ubuntu 14.04 99ec81b80c55 3 weeks ago 266 MB
...
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$ docker run ubuntu echo “hello world”
hello world
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Demo
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$ docker run -d ubuntu ping 127.0.0.1
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$ docker run -d ubuntu ping 127.0.0.1
$ docker ps
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$ docker run -d ubuntu ping 127.0.0.1
$ docker ps
$ docker attach
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$ docker run -d ubuntu ping 127.0.0.1
$ docker ps
$ docker attach
$ docker stop/start/restart
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Demo
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$ docker run ubuntu rm /etc/passwd
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$ docker run ubuntu rm /etc/passwd
$ docker run ubuntu cat /etc/passwd
root:x:0:0:root:/root:/bin/bash
…
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$ docker run ubuntu rm /etc/passwd
$ docker run ubuntu cat /etc/passwd
root:x:0:0:root:/root:/bin/bash
…
$ docker ps -n=2
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$ docker run ubuntu rm /etc/passwd
$ docker run ubuntu cat /etc/passwd
root:x:0:0:root:/root:/bin/bash
…
$ docker ps -n=2
$ docker commit borked-ubuntu
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$ docker run ubuntu rm /etc/passwd
$ docker run ubuntu cat /etc/passwd
root:x:0:0:root:/root:/bin/bash
…
$ docker ps -n=2
$ docker commit borked-ubuntu
$ docker run borked-ubuntu cat /etc/passwd
cat: /etc/passwd: No such file or directory
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Demo
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Creating
images
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Manually
In container
$ apt-get install php5-cli
$ echo " /index.php
On host
$ docker commit
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Manually
In container
$ apt-get install php5-cli
$ echo " /index.php
On host
$ docker commit
FROM ubuntu
RUN apt-get install -y php5-cli
RUN echo " /index.php
EXPOSE 8000
ENTRYPOINT ["php", "-S", ":8000"]
Dockerfile
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Demo
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Registry
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Docker powered
mini-Heroku in
around 100 lines of
Bash.
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$ git push dokku master
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PHP
Ruby
Nodejs
Java
Scala
Go
Perl
...
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$ wget -qO- | sudo DOKKU_TAG=v0.2.3 bash
https://raw.github.com/progrium/dokku/v0.2.3/bootstrap.sh
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Demo
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Try it!
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#docker @ freenode
http://docker.io
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Happy
shipping!
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@iam_asm89
https://joind.in/11309