consul
echo '["abcdef123458"]' /var/consul/serf/local.keyring
service consul restart
# config
cat /etc/consul/config.json
# log
/var/log/syslog
CLI
consul catalog datacenters
consul catalog nodes
consul catalog services
consul monitor
consul validate /etc/consul/config.json
consul operator raft list-peers
Redirect UI to localhost
ssh -L 8500:localhost:8500 root@node1.example.com -N
UI listen on external
https://stackoverflow.com/questions/35132687/how-to-access-externally-to-consul-ui
# cat /etc/consul/config.json