Vagrantfile to deploy a Nomad cluster with Consul

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

$script = <<SCRIPT
# Installing required packages
yum -y update
yum install -y unzip curl wget vim-enhanced

# Download Nomad
NOMAD_VERSION=0.5.6
echo Fetching Nomad...
cd /tmp/
curl -sSL https://releases.hashicorp.com/nomad/${NOMAD_VERSION}/nomad_${NOMAD_VERSION}_linux_amd64.zip -o nomad.zip

echo Installing Nomad...
unzip nomad.zip
chmod +x nomad
mv nomad /usr/bin/nomad

mkdir -p /etc/nomad.d
chmod a+w /etc/nomad.d

# Bring up private interface
ifup eth1

# Set hostname's IP to made advertisement Just Work
sed -i -e "s/.*nomad.*/$(ip addr show eth1 | grep inet | awk '{print $2}' | head -1 | cut -d'/' -f1) $(hostname -s)/" /etc/hosts

# Install Consul only on server
if [ "$(hostname -s)" == "nomad-server" ]; then
    # Download Consul
    CONSUL_VERSION=0.8.2
    echo Fetching Consul...
    cd /tmp/
    curl -sSL https://releases.hashicorp.com/consul/${CONSUL_VERSION}/consul_${CONSUL_VERSION}_linux_amd64.zip -o consul.zip

    echo Installing Consul...
    unzip consul.zip
    chmod +x consul
    mv consul /usr/bin/consul

    mkdir -p /etc/consul.d
    chmod a+w /etc/consul.d

    # Start Consul server
    consul agent -server -bootstrap-expect=1 -data-dir=/opt/consul -node=$(hostname -s) -bind=192.168.50.10 \
        -client="0.0.0.0" -config-dir=/etc/consul.d -ui &>> /var/log/consul.log &
fi

# Clean up
yum clean all
rm -rf /tmp/*.zip

SCRIPT

$nomadbootstrap = <<BOOTSTRAP

if [ "$(hostname -s)" == "nomad-server" ]; then
    # Server nomad config
    cat << EOF > /etc/nomad.d/server.hcl
# log verbosity
log_level = "DEBUG"

# Setup data dir
data_dir = "/opt/nomad/server"

# Enable the server
server {
    enabled = true

    # Self-elect
    bootstrap_expect = 1
}
EOF

    # Starting Nomad Server
    /usr/bin/nomad agent -config /etc/nomad.d/server.hcl &>> /var/log/nomad.log &

else
    # Agent nomad config
    cat << EOF > /etc/nomad.d/agent.hcl
# log verbosity
log_level = "DEBUG"

# Setup data dir
data_dir = "/opt/nomad/agent"

# Enable the client
client {
    enabled = true

    # For demo assume we are talking to server1. For production,
    # this should be like "nomad.service.consul:4647" and a system
    # like Consul used for service discovery.
    servers = ["192.168.50.10:4647"]
}
EOF

    # Starting Nomad Agent
    /usr/bin/nomad agent -config /etc/nomad.d/agent.hcl &>> /var/log/nomad.log &
fi

BOOTSTRAP

Vagrant.configure(2) do |config|

  config.vm.define "server" do |server|
    server.vm.box = "centos/7"
    server.vm.hostname = "nomad-server"
    server.vm.network "forwarded_port", guest: 8500, host: 8500
    server.vm.network "private_network", ip: "192.168.50.10"
    server.vm.provision "shell", inline: $script
    server.vm.provision "shell", inline: $nomadbootstrap
    server.vm.provision "docker"
  end

  config.vm.define "agent-1" do |agent1|
    agent1.vm.box = "centos/7"
    agent1.vm.hostname = "nomad-agent-1"
    agent1.vm.network "private_network", ip: "192.168.50.20"
    agent1.vm.provision "shell", inline: $script
    agent1.vm.provision "shell", inline: $nomadbootstrap
    agent1.vm.provision "docker"
  end

  config.vm.define "agent-2" do |agent2|
    agent2.vm.box = "centos/7"
    agent2.vm.hostname = "nomad-agent-2"
    agent2.vm.network "private_network", ip: "192.168.50.30"
    agent2.vm.provision "shell", inline: $script
    agent2.vm.provision "shell", inline: $nomadbootstrap
    agent2.vm.provision "docker"
  end

  config.vm.provider "virtualbox" do |vb|
    vb.memory = "1024"
    vb.cpus = 1
  end

end