Consul defaults

consul.defaults

# consul defaults

CONSUL_CONF_DIR=/etc/consul.d

node_name=`curl -s 169.254.169.254/latest/meta-data/instance-id`
first_mac=`curl -s 169.254.169.254/latest/meta-data/network/interfaces/macs/ |head -n 1`
vpc_id=`curl -s 169.254.169.254/latest/meta-data/network/interfaces/macs/${first_mac}vpc-id`

case "$vpc_id" in
    vpc-00000000)
        datacenter=dc-name
        server_domain=internal-ip.dns.suffix
        cluster_size=3
        ;;
    # ... repeat for each datacenter
esac

if [ -n "$datacenter" ] && [ -n "$server_domain" ]
then
    CONSUL_FLAGS="-node $node_name -dc $datacenter"
    for n in `/usr/bin/seq 1 $cluster_size`
    do
        CONSUL_FLAGS="$CONSUL_FLAGS -retry-join consul${n}.$server_domain"
    done
fi