Docker Multi-host Example

build-overlay-with-swarm.sh

#!/bin/bash

#set -xe

SIZE=3
#  or 'digitalocean'
DM_DRIVER=virtualbox

function usage {
    NAME=$1
    echo "Usage: ${NAME} {create|destroy}"
}

function create_store {
    NAME=$1
    docker-machine create -d ${DM_DRIVER} ${NAME}
    eval $(docker-machine env ${NAME})
    HostIP=$(docker-machine ip ${NAME})
    export KVSTORE="etcd://${HostIP}:2379"
    docker run -d \
        -p 4001:4001 -p 2380:2380 -p 2379:2379 \
        --restart=always \
        --name etcd \
        quay.io/coreos/etcd:v2.3.7 \
            --initial-advertise-peer-urls http://${HostIP}:2380 \
            --initial-cluster default=http://${HostIP}:2380 \
            --advertise-client-urls http://${HostIP}:2379,http://${HostIP}:4001 \
            --listen-client-urls http://0.0.0.0:2379,http://0.0.0.0:4001 \
            --listen-peer-urls http://0.0.0.0:2380
}

function create_master {
    NAME=$1
    echo "kvstore is ${KVSTORE}"
    # eth1 on virtualbox, eth0 on digitalocean
    docker-machine create -d ${DM_DRIVER} \
        --swarm \
        --swarm-discovery=${KVSTORE} \
        --swarm-master \
        --engine-opt="cluster-store=${KVSTORE}" \
        --engine-opt="cluster-advertise=eth1:2376" \
        ${NAME}
}

function create_node {
    NAME=$1
    echo "kvstore is ${KVSTORE}"
    # eth1 on virtualbox, eth0 on digitalocean
    docker-machine create -d ${DM_DRIVER} \
        --swarm \
        --swarm-discovery=${KVSTORE} \
        --engine-opt="cluster-store=${KVSTORE}" \
        --engine-opt="cluster-advertise=eth1:2376" \
        ${NAME}
}

function create {
    create_store kvstore
    create_master master
    for i in $(seq ${SIZE})
    do
        create_node node${i} &
    done

    wait
}

function destroy {
    for i in $(seq ${SIZE})
    do
        docker-machine rm -y node${i} || true
    done
    docker-machine rm -y master || true
    docker-machine rm -y kvstore || true
}

SUBCMD=$1

case "${SUBCMD}" in
    create) create ;;
    destroy) destroy ;;
    *) usage $0 && exit 1
esac

build-overlay-without-swarm.sh

#!/bin/bash

#set -xe

SIZE=3
#  or 'digitalocean'
DM_DRIVER=virtualbox

function usage {
    NAME=$1
    echo "Usage: ${NAME} {create|destroy}"
}

function create_store {
    NAME=$1
    docker-machine create -d ${DM_DRIVER} ${NAME}
    eval $(docker-machine env ${NAME})
    HostIP=$(docker-machine ip ${NAME})
    export KVSTORE="etcd://${HostIP}:2379"
    docker run -d \
        -p 4001:4001 -p 2380:2380 -p 2379:2379 \
        --restart=always \
        --name etcd \
        quay.io/coreos/etcd:v2.3.7 \
            --initial-advertise-peer-urls http://${HostIP}:2380 \
            --initial-cluster default=http://${HostIP}:2380 \
            --advertise-client-urls http://${HostIP}:2379,http://${HostIP}:4001 \
            --listen-client-urls http://0.0.0.0:2379,http://0.0.0.0:4001 \
            --listen-peer-urls http://0.0.0.0:2380
}

function create_node {
    NAME=$1
    echo "kvstore is ${KVSTORE}"
    # eth1 on virtualbox, eth0 on digitalocean
    docker-machine create -d ${DM_DRIVER} \
        --engine-opt="cluster-store=${KVSTORE}" \
        --engine-opt="cluster-advertise=eth1:2376" \
        ${NAME}
}

function create {
    create_store kvstore
    for i in $(seq ${SIZE})
    do
        create_node node${i} &
    done

    wait
}

function destroy {
    for i in $(seq ${SIZE})
    do
        docker-machine rm -y node${i} || true
    done
    docker-machine rm -y kvstore || true
}

SUBCMD=$1

case "${SUBCMD}" in
    create) create ;;
    destroy) destroy ;;
    *) usage $0 && exit 1
esac

test.sh

#!/bin/bash

function swarm {
    eval $(docker-machine env --swarm master)
    set -xe
    docker network create -d overlay mynet
    docker run -itd --net=mynet --name bb1 busybox
    docker run -itd --net=mynet --name bb2 busybox
    docker run -itd --net=mynet --name bb3 busybox
}

function nonswarm {
    
    eval $(docker-machine env node1)
    set -xe
    docker network create -d overlay mynet
    docker run -itd --net=mynet --name bb1 busybox
    set +xe
    
    eval $(docker-machine env node2)
    set -xe
    docker run -itd --net=mynet --name bb2 busybox
    set +xe
    
    eval $(docker-machine env node3)
    set -xe
    docker run -itd --net=mynet --name bb3 busybox
    set +xe
}

function usage {
    echo "Usage: $1 {swarm|nonswarm}"
}

case "$1" in
    swarm) swarm ;;
    nonswarm) nonswarm ;;
    *) usage ;;
esac