Docker Machine
Hello Everyone
Welcome to CloudAffaire and this is Debjeet.
In the last blog post, we have discussed docker stack.
https://cloudaffaire.com/docker-stack/
In this blog post, we will discuss docker machine. We will also create a docker swarm manager node in AWS EC2 using docker machine.
Prerequisite for this demo:
- AWS EC2 Linux 2 instance with internet access
- Docker 1.2 and above
- AWS CLI
- IAM user with programmatic access to create and manage EC2 instance
- Your AWS VPC, subnet, Availability zone and Security Group information
What is a docker machine?
Docker Machine is a tool that lets you install Docker Engine on virtual hosts and manage the hosts with docker-machine commands. You can use Machine to create Docker hosts on your local Mac or Windows box, on your company network, in your data center, or on cloud providers like Azure, AWS, or Digital Ocean.
Using docker-machine commands, you can start, inspect, stop, and restart a managed host, upgrade the Docker client and daemon, and configure a Docker client to talk to your host.
Next, we are going to create a docker swarm manager in AWS using docker machine.
Docker Machine Demo:
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##----------------------- ## Docker: Docker Machine ##----------------------- ## docker-machine Commands ############################ ## docker machine setup ## ############################ # Prerequisites # 1. AWS EC2 Linux 2 instance # 2. docker 1.2 and above # 3. aws cli # 4. IAM user with programetic access to create and manage EC2 instance # 5. Your AWS VPC, Subnet, Security Groups and AZ info ## We have already instaled docker and aws cli docker --version aws --version ## Install docker machine ## reference: https://docs.docker.com/machine/install-machine/ ## Download the Docker Machine binary and extract it to your PATH. base=https://github.com/docker/machine/releases/download/v0.16.0 && curl -L $base/docker-machine-$(uname -s)-$(uname -m) >/tmp/docker-machine && sudo install /tmp/docker-machine /usr/local/bin/docker-machine ## Check the installation by displaying the Machine version: docker-machine version ## Setup AWS environment variables that will be used to create the docker swarm nodes export AWS_ACCESS_KEY_ID= export AWS_SECRET_ACCESS_KEY= export AWS_DEFAULT_REGION= export AWS_VPC_ID= export AWS_AZ= export AWS_VPC_SUBNET= ## check if env variables are set env | grep AWS* |
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################################# ## Docker Machine Management ## ################################# ## Create a machine in AWS EC2 (create a swarm manager) docker-machine create -d amazonec2 --amazonec2-vpc-id $AWS_VPC_ID --amazonec2-region $AWS_DEFAULT_REGION --amazonec2-zone $AWS_AZ --amazonec2-instance-type t2.micro --amazonec2-subnet-id $AWS_VPC_SUBNET --amazonec2-security-group docker-swarm docker-swarm-manager ## List machines docker-machine ls |
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## Log into or run a command on a machine with SSH. (get docker swarm manager private ip address) docker-machine ssh docker-swarm-manager ifconfig eth0 #172.31.23.204 in my case ## Get the public IP address of a machine docker-machine ip docker-swarm-manager ## Display the commands to set up the environment for the Docker client (Point your docker client to the swarm manager) eval $(docker-machine env docker-swarm-manager) ## Initialize Swarm mode. docker swarm init --advertise-addr 172.31.23.204 # This is the internal IP of docker manager node. ## Print which machine is active docker-machine active ## Inspect information about a machine docker-machine inspect docker-swarm-manager ## Get the status of a machine docker-machine status docker-swarm-manager ## Get the URL of a machine docker-machine url docker-swarm-manager ## Regenerate TLS Certificates for a machine docker-machine regenerate-certs docker-swarm-manager ## Upgrade a machine to the latest version of Docker docker-machine upgrade docker-swarm-manager ## Stop a machine docker-machine stop docker-swarm-manager ## Start a machine docker-machine start docker-swarm-manager ## Restart a machine docker-machine restart docker-swarm-manager ## Re-provision existing machines docker-machine provision docker-swarm-manager ## Copy files between machines docker-machine scp [[user@]machine:][path]] [[user@]machine:][path]] ## Mount or unmount a directory from a machine with SSHFS. ## docker-machine mount [machine:][path] [mountpoint] ## You must have a copy of the sshfs binary locally to use the mount feature mkdir test docker-machine ssh docker-swarm-manager mkdir test docker-machine mount docker-swarm-manager:/home/docker/test test touch test/data docker-machine ssh docker-swarm-manager ls test/data docker-machine mount -u docker-swarm-manager:/home/docker/test test ## Remove a machine docker-machine rm docker-swarm-manager ## Swithc to current host eval $(docker-machine env -u) ## Remove the environment variables unset AWS_ACCESS_KEY_ID \ unset AWS_SECRET_ACCESS_KEY \ unset AWS_DEFAULT_REGION \ unset AWS_VPC_ID \ unset AWS_VPC_SUBNET \ unset AWS_AZ \ env | grep AWS* |
Hope you have enjoyed this article. In the next blog post, we will discuss how to create docker swarm cluster in AWS EC2.
To get more details on docker, please refer below docker documentation