sp-consul-client

# variables
my_ip6=$(ifconfig ens4 | grep "inet addr" | awk '{ print substr($2,6) }')
consul_domain="consul.$HOSTNAME"

#echo " ===> Updating package cache"
#apt-get update

echo " ===> Installing unzip"
apt-get install -y unzip

echo " ===> Creating Consul user"
useradd -m -d /var/lib/consul -r consul

echo " ===> Creating Consul-related directories and files"
mkdir -p /var/lib/consul
chown consul: /var/lib/consul
chmod 750 /var/lib/consul

mkdir -p /etc/consul.d
chown consul: /etc/consul.d
chmod 750 /etc/consul.d

mkdir -p /opt/consul-web
chown consul: /opt/consul-web
chmod 750 /opt/consul-web

touch /var/log/consul.log
chown consul: /var/log/consul.log
chmod 640 /var/log/consul.log

echo " ===> Installing Consul"
if [[ ! -f /usr/local/bin/consul ]]; then
pushd /tmp
   wget https://releases.hashicorp.com/consul/1.2.0/consul_1.2.0_linux_amd64.zip
   unzip consul_1.2.0_linux_amd64.zip
   mv consul /usr/local/bin
 popd
fi

for attempt in {1..3}; do
#  _nodes=($(dig -t txt ${consul_domain} | grep TXT | awk '{print $5}' | grep -v ^$ | sort | tr -d \"))
_nodes=$HOSTNAME
if [[ -z $_nodes ]]; then
   echo "No consul nodes found. Sleeping"
   sleep 10
 else
   break
 fi
done

_consul_nodes=""
for _node in "${_nodes[@]}"; do
 if [[ -z $_consul_nodes ]]; then
   _consul_nodes="\"${_node}\""
 else
   _consul_nodes="${_consul_nodes}, \"${_node}\""
 fi
done

echo " ===> Configuring Consul"
cat >/etc/consul.d/config.json <<EOF
{
   "advertise_addr": "${my_ip6}",
   "encrypt": "vZOYuDxz4pA9EHb/MdmPyQ==",
   "client_addr": "0.0.0.0",
   "bind_addr": "${my_ip6}",
   "data_dir": "/var/lib/consul",
   "datacenter": "DC1",
   "rejoin_after_leave": true,
   "retry_interval": "30s",
   "retry_join": ["10.128.0.12"],
   "server": false,
   "enable_syslog": false,
   "log_level": "INFO"
}
EOF

echo " ===> Installing init script"

cat >/etc/systemd/system/consul.service <<EOF
[Unit]
Description=consul agent
Requires=network-online.target
After=network-online.target
[Service]
EnvironmentFile=-/etc/sysconfig/consul
Environment=GOMAXPROCS=2
Restart=on-failure
ExecStart=/bin/bash -ce "exec /usr/local/bin/consul agent  -config-dir=/etc/consul.d >>/var/log/consul.log 2>&1"
ExecReload=/bin/kill -HUP
LimitNOFILE=1048576
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
TimeoutStartSec=0
KillSignal=SIGINT
[Install]
WantedBy=multi-user.target
EOF

echo " ===> Starting Consul"
systemctl enable consul.service
systemctl daemon-reload

echo " ===> Starting Consul"
service consul start