= Docker =
Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications.

http://www.zdnet.com/article/what-is-docker-and-why-is-it-so-darn-popular/

Developers can use Docker to pack, ship, and run any application as a lightweight, portable, self sufficient LXC container that can run virtually anywhere. 

In a nutshell, here's what Docker can do for you: It can get more applications running on the same hardware than other technologies; it makes it easy for developers to quickly create, ready-to-run containered applications; and it makes managing and deploying applications much easier.

http://en.wikipedia.org/wiki/LXC

LXC (Linux Containers) is an operating system–level virtualization method for running multiple isolated Linux systems (containers) on a single control host.

LXC provides operating system-level virtualization through a virtual environment that has its own process and network space, instead of creating a full-fledged virtual machine.

== Tutorial ==
https://www.docker.com/tryit

https://hub.docker.com/

https://docs.docker.com/installation

https://docs.docker.com/articles/basics/

== Windows install ==
https://docs.docker.com/installation/windows/

The Docker Engine uses Linux-specific kernel features, so to run it on Windows we need to use a lightweight virtual machine (vm).

docker run hello-world


== Docker SSH container Ubuntu ==
https://docs.docker.com/examples/running_ssh_service/

In bootDocker create ~/ssh/Dockerfile :
{{{
# sshd
#
# VERSION               0.0.2

FROM ubuntu:14.04
MAINTAINER Sven Dowideit <SvenDowideit@docker.com>

RUN apt-get update && apt-get install -y openssh-server
RUN mkdir /var/run/sshd
RUN echo 'root:screencast' | chpasswd
RUN sed -i 's/PermitRootLogin without-password/PermitRootLogin yes/' /etc/ssh/sshd_config

# SSH login fix. Otherwise user is kicked off after login
RUN sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i /etc/pam.d/sshd

ENV NOTVISIBLE "in users profile"
RUN echo "export VISIBLE=now" >> /etc/profile

EXPOSE 22
CMD ["/usr/sbin/sshd", "-D"]
}}}

 * docker build -t eg_sshd .
 * docker run -d -P --name test_sshd eg_sshd
 * docker ps -l
 * ssh root@127.0.0.1 -p49153 # password screencast
 * sudo docker stop test_sshd # stop container test_sshd

== Install jdk8 in trusty ==
 * apt-get install software-properties-common
 * add-apt-repository ppa:openjdk-r/ppa -y
 * apt-get update
 * apt-get install openjdk-8-jdk

Dockerfile
{{{
FROM ubuntu:14.04

RUN apt-get update && \
    apt-get install -y traceroute openssh-server software-properties-common mongodb rabbitmq-server  && \
    add-apt-repository ppa:openjdk-r/ppa -y && \
    apt-get update && \
    apt-get install -y openjdk-8-jdk

RUN mkdir /var/run/sshd
RUN echo 'root:12345678' | chpasswd
RUN sed -i 's/PermitRootLogin without-password/PermitRootLogin yes/' /etc/ssh/sshd_config

# SSH login fix. Otherwise user is kicked off after login
RUN sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i /etc/pam.d/sshd

ENV NOTVISIBLE "in users profile"
RUN echo "export VISIBLE=now" >> /etc/profile

EXPOSE 22 8080 8081 8082 5672 15672 27017 80
CMD ["/usr/sbin/sshd", "-D"]

}}}

= Install Docker CE slack 64 14.2 =
 * https://slackbuilds.org/repository/14.2/system/docker/

== Install go lang ==
{{{
cd /tmp
wget https://slackbuilds.org/slackbuilds/14.2/development/google-go-lang.tar.gz
tar xvzf google-go-lang.tar.gz
cd google-go-lang
wget https://storage.googleapis.com/golang/go1.10.1.src.tar.gz
change slackbuild to use 1.10.1
./google-go-lang.SlackBuild
installpkg /tmp/google-go-lang-1.9.5-x86_64-1_SBo.tgz
go --version 

In ~/.bashrc 
export GOPATH="$HOME:/usr/share/gocode"
go help buildmode
go get golang.org/x/tools/cmd/godoc

remove support to gcc-go !

/usr/lib64/go1.10.1/go/bin/
/usr/lib64/go1.10.1/go/bin/go version
# in ~/.bashrc
export PATH="$PATH:/usr/lib64/go1.10.1/go/bin/"
}}}

== Install docker-proxy ==
{{{
cd /tmp
wget https://slackbuilds.org/slackbuilds/14.2/system/docker-proxy.tar.gz
tar xvzf docker-proxy.tar.gz
cd docker-proxy
wget https://github.com/docker/libnetwork/archive/1b91bc9/libnetwork-1b91bc94094ecfdae41daa465cc0c8df37dfb3dd.tar.gz
./docker-proxy.SlackBuild 
installpkg /tmp/docker-proxy-20180314_1b91bc9-x86_64-1_SBo.tgz
}}}

== Install tini ==
{{{
cd /tmp
wget https://slackbuilds.org/slackbuilds/14.2/system/tini.tar.gz
tar xvzf tini.tar.gz 
cd tini
wget https://github.com/krallin/tini/archive/949e6fa/tini-949e6facb77383876aeff8a6944dde66b3089574.tar.gz
./tini.SlackBuild 
installpkg /tmp/tini-0.13.0_949e6fa-x86_64-1_SBo.tgz 
}}}

== Install libseccomp ==
{{{
cd /tmp
wget https://slackbuilds.org/slackbuilds/14.2/libraries/libseccomp.tar.gz
tar xvzf libseccomp.tar.gz
cd libseccomp
wget https://github.com/seccomp/libseccomp/archive/v2.3.3/libseccomp-2.3.3.tar.gz
./libseccomp.SlackBuild 
installpkg /tmp/libseccomp-2.3.3-x86_64-1_SBo.tgz 
}}}

== Install runc ==
{{{
cd /tmp
wget https://slackbuilds.org/slackbuilds/14.2/system/runc.tar.gz
tar xvzf runc.tar.gz 
cd runc
wget https://github.com/opencontainers/runc/archive/v1.0.0-rc5/runc-1.0.0-rc5.tar.gz
./runc.SlackBuild 
installpkg /tmp/runc-1.0.0_rc5-x86_64-1_SBo.tgz
}}}

== Install containerd ==
{{{
cd /tmp
wget https://slackbuilds.org/slackbuilds/14.2/system/containerd.tar.gz
tar xvzf containerd.tar.gz
cd containerd
wget https://github.com/containerd/containerd/archive/v1.0.2/containerd-1.0.2.tar.gz
./containerd.SlackBuild 
installpkg /tmp/containerd-1.0.2-x86_64-1_SBo.tgz
}}}

== Install docker ==
{{{
cd /tmp
wget https://slackbuilds.org/slackbuilds/14.2/system/docker.tar.gz
tar xvzf docker.tar.gz
cd docker 
wget https://github.com/docker/docker-ce/archive/v18.03.0-ce/docker-ce-18.03.0-ce.tar.gz
./docker.SlackBuild
installpkg /tmp/docker-18.03.0-x86_64-1_SBo.tgz

Added option --userland-proxy=false in  /etc/rc.d/rc.docker variable 
DOCKER_OPTS="--userland-proxy=false"
}}}

== Docker image with SSH Ubuntu Xenial 16.04 ==
Adapted from https://docs.docker.com/engine/examples/running_ssh_service/

Dockerfile:
{{{
# https://docs.docker.com/engine/examples/running_ssh_service/
FROM ubuntu:16.04

RUN apt-get update && apt-get install -y openssh-server
RUN mkdir /var/run/sshd
RUN echo 'root:screencast' | chpasswd
RUN sed -i 's/PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config

# SSH login fix. Otherwise user is kicked off after login
RUN sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i /etc/pam.d/sshd

ENV NOTVISIBLE "in users profile"
RUN echo "export VISIBLE=now" >> /etc/profile
RUN useradd userx
RUN echo 'userx:userx' | chpasswd

EXPOSE 22
CMD ["/usr/sbin/sshd", "-D"]
}}}

Steps:
{{{
docker build -t docker_test . 
docker run -d -P --name test_container1 docker_test 
docker ps -a
ssh root@127.0.0.1 -p32771
useradd userx
echo 'userx:userx' | chpasswd
ssh userx@127.0.0.1 -p32771
docker container stop test_container1
docker container rm test_container1
docker image rm docker_test
}}}

== Install Docker in Ubuntu Xenial vagrant box ==
{{{#!highlight bash
mkdir tmp
cd tmp
vagrant init ubunu/xenial64
vagrant up
vagrant ssh
# inside the box with user vagrant
sudo bash
apt-get update
apt-get install apt-transport-https  ca-certificates curl  software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
apt-key fingerprint 0EBFCD88
add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
apt-get update
apt-get install docker-ce
docker run hello-world
usermod -aG docker
exit
exit
#login again with vagrant ssh
# as user vagrant 
docker run hello-world
# install java and maven 
apt-get install openjdk-8-jdk
apt-get install maven

}}}