NOTE 1.0
It's good to bear in mind that things have changed a bit in ECS-land since I created this course. The underlying architecture and processes involved in launching Docker infrastructure still works the way it always did, but the look of the console interface has been updated.
More importantly, there's a whole new option for handling the underlying host instance where your containers will live. You can still launch your own EC2 instance based on the ECS-optimized AMI the way I do it in this course, but you no longer
need to.
Instead, ECS now provides a managed compute option - inexplicably called Fargate - that requires no care and feeding. In fact, as long as you select Fargate in the setup, you don't even need to know it's there.
So at least until I update the course, everything you'll see is still correct. But you may consider investing less effort in those sequences in the "Amazon ECS: Building a Cluster Environment" module where I provision the EC2 instance.
Note 1.1
Although I often recommend
running LXC containers as a fantastic virtual environment for experimenting, don't even think about it for Docker: since both technologies use abstractions of the host kernel, they'd be stepping all over each other's feet trying to get things done. Instead, unless you choose to follow along with the command line-based demos directly on an actual physical PC, I would recommend installing VirtualBox, downloading an Ubuntu 16.04 ISO file, and firing up as many VMs as you like. I included a
video on working with VirtualBox in my Linux Server Virtualization course.
The fact is, however, that most of the action in this course will take place in the AWS browser console...which provides its own lab environment.
Contents:
Installing Docker on an EC2 Instance
<![CDATA[
ssh -i plural.pem ubuntu@x.x.x.x
uname -r
sudo su
apt install apt-transport-https ca-certificates
apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
nano /etc/apt/sources.list.d/docker.list
deb https://apt.dockerproject.org/repo ubuntu-xenial main
apt update
##########
NOTE:
Recent Linux kernel versions contain this functionality right out of the box,
so installing the "linux-image-extra-virtual" package through the next step
("apt install linux-image-extra...") will probably no longer be necessary.
You'll definitely still need to run "apt install docker engine" though!
##########
apt install linux-image-extra-$(uname -r) linux-image-extra-virtual
apt update
apt install docker-engine
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Running Docker from the Command Line
<![CDATA[
sudo su
systemctl start docker
systemctl status docker
docker run hello-world
docker
docker info
docker run -it ubuntu bash
ls
apt update
exit
docker info
docker run -it --detach=true ubuntu bash
docker ps
docker rename crazy_name newname
docker ps
docker inspect newname | less
docker network ls
docker network create newnet
docker network inspect newnet | less
docker network connect newnet newname
docker inspect newname
ping 172.18.0.2 [newnet]
ping 172.17.0.2 [bridge]
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Working with Dockerfiles
<![CDATA[
##############################
# Simple Dockerfile
#
FROM ubuntu:16.04
RUN apt update
RUN apt install -y apache2
RUN echo "Welcome to my web site" > /var/www/html/index.html
EXPOSE 80
##############################
sudo su
nano dockerfile
[paste]
docker build -t "webserver" .
docker images
docker run -d -p 80:80 webserver /usr/sbin/apache2ctl -D FOREGROUND
docker ps
curl localhost
from browser:
54.227.88.211
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Pulling a Docker Hub Image
<![CDATA[
docker search apache/ubuntu
docker search ubuntu
docker pull ubuntu
docker run -it ubuntu /bin/bash
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Importing SSL Certificates to Browsers
Environment:
Use this command to prepare the package for your client browser:
<![CDATA[
cd ~/my-ca
openssl pkcs12 -export -in server_crt.pem -inkey basekey.pem -out browser.p1
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Working with ECS through the AWS CLI
<![CDATA[
### http://docs.aws.amazon.com/cli/latest/userguide/installing.html
python --version
curl "https://s3.amazonaws.com/aws-cli/awscli-bundle.zip" -o "awscli-bundle.zip"
sudo apt install unzip
unzip awscli-bundle.zip
sudo ./awscli-bundle/install -i /usr/local/aws -b /usr/local/bin/aws
aws configure
<ul>add us-east-1</ul>
cd .aws
ls
nano config
aws ecs help
aws ecs list-clusters
aws ecs describe-clusters
aws ecs create-cluster --cluster-name newcluster
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Working with Docker Hub
<![CDATA[
sudo su
cat dockerfile
docker build -t newerserver .
docker run -d -p 80:80 newerserver
docker ps
curl localhost
docker login
docker images
docker tag 1f9bd3ea1a9d dbclinton/newerserver
docker push dbclinton/newerserver
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Authenticate Docker Hub from ECS
<![CDATA[
ssh -i plural.pem ec2-user@54.163.138.203
sudo su
cd /etc/ecs
nano ecs.config
ECS_ENGINE_AUTH_TYPE=docker
ECS_ENGINE_AUTH_DATA={"https://index.docker.io/v1/":{"username":"dbclinton","password":"my-password","email":"bootstrap@gmail.com"}}
stop ecs
start ecs
docker inspect ecs-agent | grep ECS_DATADIR
]]>