Docker Tutorial 10

Load balanced stack using docker swarm, but before we start create the swarm with the boot2docker images

For Hyperv setup run

docker-machine create -d hyperv --hyperv-virtual-switch "dockerswarm" --hyperv-boot2docker-url https://github.com/boot2docker/boot2docker/releases/download/v18.06.1-ce/boot2docker.iso nodemanager
docker-machine create -d hyperv --hyperv-virtual-switch "dockerswarm"  --hyperv-boot2docker-url https://github.com/boot2docker/boot2docker/releases/download/v18.06.1-ce/boot2docker.iso nodeworker 

For Virtual box setup run

docker-machine create --driver virtualbox --virtualbox-boot2docker-url https://github.com/boot2docker/boot2docker/releases/download/v18.06.1-ce/boot2docker.iso nodemanager
docker-machine create --driver virtualbox --virtualbox-boot2docker-url https://github.com/boot2docker/boot2docker/releases/download/v18.06.1-ce/boot2docker.iso nodeworker

Make the node manager the swarm manager

docker-machine ssh nodemanager "docker swarm init --advertise-addr $(docker-machine ip nodemanager)"

Add the cluster node to the swarm

docker-machine ssh nodeworker "docker swarm join --token {TOKEN} $(docker-machine ip nodemanager):2377"

Set the node manager environment to your docker machine

# Windows
docker-machine env nodemanager | Invoke-Expression
# Nix
eval $(docker-machine env nodemanager)

Create the networks:

docker network create --driver overlay --subnet=172.10.1.0/24 tut10-frontend

docker network create --driver overlay --subnet=172.10.2.0/23 tut10-backend

Deploy the stack

docker stack deploy -c php-mysqli-apache.yml php-mysqli-apache

Veify the stack has been deployed

docker stack ls

Verify all the containers have been deployed

docker stack ps php-mysqli-apache

Verify the load balancers have all the replicas and mapped the ports

docker stack services php-mysqli-apache

See what containers are on the nodemanager in the swarm

docker ps
# or
docker-machine ssh nodemanager "docker ps"

See what containers are on the nodeworker in the swarm

docker-machine ssh nodeworker "docker ps"

Verify that the stack is working correctly

# local node master
curl http://localhost:8080
# vm node master
curl http://$(docker-machine ip nodemanager):8080

Destory and remove the stack

docker stack rm php-mysqli-apache