Microservices using AWS Beanstalk or ECS for Docker

Docker

http://docs.aws.amazon.com/AmazonECS/latest/developerguide/docker-basics.html

https://wiki.openstack.org/wiki/Docker

https://docs.docker.com/userguide/

http://www.kegel.com/c10k.html

http://wiki.nginx.org/Main
Services discovery
https://www.consul.io/

https://registry.hub.docker.com/u/progrium/consul/

Docker Compose

Docker commands

getting a shell

$ docker exec -lt tomcat bash

$ winpty docker exec -lt tomcat bash

Docker Installation on RHEL 7.2

201705 update

   77  sudo yum install docker

   78  sudo yum install -y yum-utils

   79  sudo yum-config-manager     --add-repo     https://download.docker.com/linux/centos/docker-ce.repo

   80  sudo yum-config-manager --enable docker-ce-edge

   81  sudo yum makecache fast

   83  sudo yum install docker-ce

   84  sudo systemctl start docker

   85  sudo docker run hello-world

   86  docker ps

https://blog.docker.com/2015/07/new-apt-and-yum-repos/

We are moving to microservices.  This architectural change will involve partitioning our code along service lines that will also break up our current WAR based deployments.  Part of this exercise accomplished via a move to Docker containers and Kubernetes as the orchestration and auto scaling engine.  The docker containers will live in our current OpenStack private cloud.

Installing Docker

Install docker on RHEL 7.2  (7.x supported)
https://docs.docker.com/engine/installation/rhel/
Set Alcatel-Lucent proxy
https://docs.docker.com/engine/articles/systemd/#http-proxy

Installing on a RHEL 7.2 metal or VM instance

sudo su

mkdir /etc/systemd/system/docker.service.d

vi /etc/systemd/system/docker.service.d/http-proxy.conf

[Service] Environment="HTTP_PROXY=http://global.proxy:80"

vi /etc/yum.repos.d/docker.repo

[dockerrepo] name=Docker Repository baseurl=https://yum.dockerproject.org/repo/main/centos/7 enabled=1 gpgcheck=1 gpgkey=https://yum.dockerproject.org/gpg

yum install docker-engine

service docker start

Verify container operation

sudo docker run hello-world

A more realistic demo would be to create an empty fedora (RHEL compatible) vm and enter a shell on the VM.  Open a 2nd cmd window and type "docker events" to listen in on container creation/destruction - in the case where you "exit" from the container.

in a 1st terminal

obrienlabs-mbp15:~ michaelobrien$ ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no root@192.168.121.133

docker events

and in a 2nd terminal

docker run --rm -ti fedora:latest /bin/bash

[root@rhel72virtual stack]# docker run --rm -ti fedora:latest /bin/bash  Unable to find image 'fedora:latest' locally  latest: Pulling from library/fedora 369aca82a5c0: Pull complete  3fc68076e184: Pull complete  Digest: sha256:7d916d5d3ab2d92147e515d3c09cb47a0431e2fff9d550fd9bcc4fed379af9ea Status: Downloaded newer image for fedora:latest [root@e7de408df84b /]# ls bin  boot  dev  etc  home  lib  lib64  lost+found  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var [root@e7de408df84b /]# df Filesystem                                                                                      1K-blocks    Used Available Use% Mounted on /dev/mapper/docker-253:0-21844-e7de408df84b187a90e298609097a27dd1eeda0bea346278d3ebff2343e98705 104805376  255332 104550044   1% / [root@e7de408df84b /]# exit  exit [root@rhel72virtual stack]#

in the "docker events" terminal (note: the hex is different because I tested with a 2nd instance

[root@rhel72virtual ~]# docker events 2016-01-05T17:04:37.916688150-05:00 b633da3a3e55457cb7b81d75f0516f07da065d211b07573b4ae79d5762322f4a: (from fedora:latest) create 2016-01-05T17:04:37.951828323-05:00 b633da3a3e55457cb7b81d75f0516f07da065d211b07573b4ae79d5762322f4a: (from fedora:latest) attach 2016-01-05T17:04:38.006487503-05:00 b633da3a3e55457cb7b81d75f0516f07da065d211b07573b4ae79d5762322f4a: (from fedora:latest) start 2016-01-05T17:04:38.147536237-05:00 b633da3a3e55457cb7b81d75f0516f07da065d211b07573b4ae79d5762322f4a: (from fedora:latest) resize 2016-01-05T17:04:56.375942258-05:00 b633da3a3e55457cb7b81d75f0516f07da065d211b07573b4ae79d5762322f4a: (from fedora:latest) die 2016-01-05T17:04:58.110736214-05:00 b633da3a3e55457cb7b81d75f0516f07da065d211b07573b4ae79d5762322f4a: (from fedora:latest) destroy

Docker Installation on Ubuntu 14.04

Docker Installation on OSX 10.11

The following tutorial is very good
https://docs.docker.com/installation/mac/

bash-3.2$ docker run -d -P --name web nginx

bash-3.2$ docker ps

CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS              PORTS                                           NAMES

15abd6456e7e        nginx:latest        "nginx -g 'daemon of   56 seconds ago      Up 56 seconds       0.0.0.0:32769->80/tcp, 0.0.0.0:32768->443/tcp   web      

bash-3.2$ docker port web

bash-3.2$ boot2docker ip

http://192.168.59.103:32769

bash-3.2$ docker run -d -P -v $HOME/site:/usr/share/nginx/html --name mysite nginx

e6b5188e2dba301ce9b041b472dc9dc79272beae87d9840c82052ddd6735e614

bash-3.2$ docker ps

CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS              PORTS                                           NAMES

34e4e4239aa7        nginx:latest        "nginx -g 'daemon of   6 minutes ago       Up 6 minutes        0.0.0.0:32777->80/tcp, 0.0.0.0:32776->443/tcp   mysite              

15abd6456e7e        nginx:latest        "nginx -g 'daemon of   32 minutes ago      Up 32 minutes       0.0.0.0:32769->80/tcp, 0.0.0.0:32768->443/tcp   web       

bash-3.2$ docker stop mysite

bash-3.2$ docker rm mysite

Install Docker Compose

https://github.com/docker/compose/releases

[root@biomos40 openstack]# curl -L https://github.com/docker/compose/releases/download/1.5.2/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   600    0   600    0     0   1183      0 --:--:-- --:--:-- --:--:--  1183
100 7739k  100 7739k    0     0  1392k      0  0:00:05  0:00:05 --:--:-- 1690k
[root@biomos40 openstack]# chmod +x /usr/local/bin/docker-compose

do command completion

curl -L https://github.com/docker/compose/releases/download/1.5.2/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose

[openstack@biomos40 ~]$ docker-compose --version
docker-compose version 1.5.2, build 7240ff3

Notes

http://developer.openstack.org/api-guide/quick-start/api-quick-start.html#client-intro

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