AWS Ubuntu16 consul cluster with autojoin

consul-cluster.sh

#!/bin/bash
# Create 3 EC2 instances - add tag=consul_join , value=cluster to each

# EC2 cmds (as root):
# -----
apt-get -yqq install unzip &>/dev/null
cd /tmp
curl -sLo consul.zip https://releases.hashicorp.com/consul/1.0.2/consul_1.0.2_linux_amd64.zip
unzip consul.zip >/dev/null
chmod +x consul
mv consul /usr/local/bin/consul

mkdir /mnt/consul /etc/consul.d/ /run/consul

PRIVATE_IP=$(curl http://169.254.169.254/latest/meta-data/local-ipv4)
PUBLIC_IP=$(curl http://169.254.169.254/latest/meta-data/public-ipv4)

cat <<EOF >/etc/consul.d/config.json
{
  "bind_addr": "$PRIVATE_IP",
  "advertise_addr": "$PRIVATE_IP",
  "advertise_addr_wan": "$PUBLIC_IP",
  "data_dir": "/mnt/consul",
  "disable_remote_exec": true,
  "disable_update_check": true,
  "leave_on_terminate": true,
       "bootstrap_expect": 3,
     "node_name": "consul-kms-server-0",
     "retry_join": ["provider=aws tag_key=consul_join tag_value=cluster"],
     "server": true
}
EOF

#systemctl svc unit
#------------------
cat <<'EOF' > /lib/systemd/system/consul.service
[Unit]
Description=Consul service discovery agent
Requires=network-online.target
After=network-online.target
[Service]
User=consul
Group=consul
PermissionsStartOnly=true
PIDFile=/run/consul/consul.pid
EnvironmentFile=-/etc/default/consul
Environment=GOMAXPROCS=2
Restart=on-failure
ExecStartPre=[ -f "/run/consul/consul.pid" ] && /usr/bin/rm -f /run/consul/consul.pid
ExecStart=/usr/local/bin/consul agent $OPTIONS -config-dir=/etc/consul.d
ExecReload=/bin/kill -HUP $MAINPID
KillSignal=SIGINT
TimeoutStopSec=5
[Install]
WantedBy=multi-user.target
EOF

useradd -d /mnt/consul/ -r -s /bin/sh -U consul
chown consul:consul /mnt/consul/ && chown consul:root /etc/consul.d/ -R && chown consul:root /run/consul/
touch /etc/default/consul
systemctl enable consul
systemctl start consul