dasgoll

wget https://get.docker.io/builds/Linux/x86_64/docker-latest -O docker
cp docker  /usr/local/bin/
chmod +x /usr/local/bin/docker

root@ubuntu:~/downloads# docker -d &
[1] 7681
root@ubuntu:~/downloads# 2014/09/15 07:12:55 docker daemon: 1.2.0 fa7b24f; execdriver: native; graphdriver:
[a4987479] +job serveapi(unix:///var/run/docker.sock)
[info] Listening for HTTP on unix (/var/run/docker.sock)
[a4987479] +job init_networkdriver()

dasgoll

docker host1 = Centos
docker host2 = Ubuntu

docker pull busybox:latest
docker run -it --name busygoll -h busygoll busybox:latest /bin/bash
## do your customizations
docker commit 7d784b1e3c78 busygoll:latest
docker save   6c4412b1e31e > busygoll.tar# on docker host1
docker load < busygoll.tar # on docker host2

dasgoll

git clone git://github.com/yyuu/pyenv.git .pyenv
echo 'export PYENV_ROOT=$HOME/.pyenv' >> ~/.bashrc
echo 'export PATH=$PYENV_ROOT/bin:$PATH' >> ~/.bashrc
echo 'eval "$(pyenv init -)"' >> ~/.bashrc
. ~/.bashrc
pyenv install -v 3.7.0
pyenv global 3.7.0
pyenv rehash

dasgoll

## I needed those last time
yum install gcc  zlib-devel openssl-devel  mysql-devel 
 

## could be needed (??)
libz-dev (or zlib)
libbz2-dev
libreadline-dev
libsqlite3-dev
libncurses5-dev

dasgoll

[root@centos65vm1 man1]# docker inspect -f '{{ json .NetworkSettings }}' busygoll
{"Bridge":"docker0","Gateway":"172.17.42.1","IPAddress":"172.17.0.2","IPPrefixLen":16,"PortMapping":null,"Ports":{}}


[root@centos65vm1 man1]# docker inspect -f '{{ json .NetworkSettings }}' busygoll | python -mjson.tool
{
    "Bridge": "docker0",
    "Gateway": "172.17.42.1",
    "IPAddress": "172.17.0.2",
    "IPPrefixLen": 16,

dasgoll

That’s one of the real strengths of Docker: the ability to go back to a previous commit. The secret is simply to docker tag the image you want.

Here’s an example. In this example, I first installed ping, then committed, then installed curl, and committed that. Then I rolled back the image to contain only ping:

$ docker history imagename
IMAGE               CREATED             CREATED BY                SIZE
f770fc671f11        12 seconds ago      apt-get install -y curl   21.3 MB
28445c70c2b3        39 seconds ago      apt-get install ping      11.57 MB
8dbd9e392a96        7 months ago                                  131.5 MB

dasgoll

FROM debian:jessie
ENV VERSION 2.25
RUN apt-get update -q
RUN apt-get install -qy curl build-essential
RUN mkdir /src
WORKDIR /src
RUN curl https://www.kernel.org/pub/linux/utils/util-linux/v$VERSION/util-linux-$VERSION.tar.gz \
     | tar -zxf-
RUN ln -s util-linux-$VERSION util-linux
WORKDIR /src/util-linux

dasgoll

FROM debian:jessie
ENV VERSION 2.25
RUN apt-get update -q
RUN apt-get install -qy curl build-essential
RUN mkdir /src
WORKDIR /src
RUN curl https://www.kernel.org/pub/linux/utils/util-linux/v$VERSION/util-linux-$VERSION.tar.gz \
     | tar -zxf-
RUN ln -s util-linux-$VERSION util-linux
WORKDIR /src/util-linux

dasgoll

root@cdh5-datanode1-host ~]# docker ps
CONTAINER ID        IMAGE                                                        COMMAND             CREATED             STATUS              PORTS                  NAMES
f3d2d9ee077f        index.docker.devops.souq/analytics/ds-cdh5-datanode:v0.0.1   "supervisord -n"    25 minutes ago      Up 25 minutes       0.0.0.0:2222->22/tcp   cdh5-datanode1-container


chroot  /var/lib/docker/devicemapper/mnt/f3d2d9ee077fa23427bbc4300a1bc841476cfd89fa68e060ee517f39e9a67fee/rootfs/

dasgoll

Turn your Emails into Reminders

Evernote is not just a tool for archiving emails but the same workflow can be used to create quick reminders from your mailbox. Compose a new message, or forward an existing one, and put an exclaimation symbol in the subject line followed by the date when you would like to be reminded and send it to your Evernote address. For instance:

Subject: Learn how to code !2014/12/12
Subject: Pick up flowers !tomorrow