Load balancing with HAPROXY & CONFD


Имеем:

$ fleetctl list-units
UNIT				MACHINE				ACTIVE	SUB
rethinkdb-announce@1.service	3408f7ab.../172.17.8.103	active	running
rethinkdb-announce@2.service	b2ca4512.../172.17.8.101	active	running
rethinkdb@1.service		3408f7ab.../172.17.8.103	active	running
rethinkdb@2.service		b2ca4512.../172.17.8.101	active	running
todo-sk@1.service		3408f7ab.../172.17.8.103	active	running
todo-sk@2.service		db577263.../172.17.8.102	active	running
todo-sk@3.service		b2ca4512.../172.17.8.101	active	running
todo@1.service			3408f7ab.../172.17.8.103	active	running
todo@2.service			db577263.../172.17.8.102	active	running
todo@3.service			b2ca4512.../172.17.8.101	active	running


Я заменил оригинальные image, своими. Они отличаются только IP адресом. С оригинальным у меня не заработало.


$ vi haproxy.service


[Unit]
Description=haproxy Proxy

Requires=docker.service
After=docker.service
After=etcd2.service
Requires=etcd2.service

[Service]
EnvironmentFile=/etc/environment
User=core

Restart=always
TimeoutStartSec=0
ExecStartPre=-/usr/bin/docker kill %p-%i
ExecStartPre=-/usr/bin/docker rm %p-%i
ExecStartPre=-/usr/bin/etcdctl mkdir /services/todo
ExecStartPre=-/usr/bin/docker pull marley/coreos-haproxy
ExecStart=/usr/bin/docker run --name %p-%i \
 -h %H \
 -p \${COREOS_PUBLIC_IP}:80:80 \
 marley/coreos-haproxy
ExecStop=-/usr/bin/docker kill %p-%i
ExecStop=-/usr/bin/docker rm %p-%i

[X-Fleet]
Global=true


$ fleetctl submit haproxy.service
$ fleetctl start haproxy.service



$ fleetctl list-units
UNIT				MACHINE				ACTIVE	SUB
haproxy.service			3408f7ab.../172.17.8.103	active	running
haproxy.service			b2ca4512.../172.17.8.101	active	running
haproxy.service			db577263.../172.17.8.102	active	running
rethinkdb-announce@1.service	3408f7ab.../172.17.8.103	active	running
rethinkdb-announce@2.service	b2ca4512.../172.17.8.101	active	running
rethinkdb@1.service		3408f7ab.../172.17.8.103	active	running
rethinkdb@2.service		b2ca4512.../172.17.8.101	active	running
todo-sk@1.service		3408f7ab.../172.17.8.103	active	running
todo-sk@2.service		db577263.../172.17.8.102	active	running
todo-sk@3.service		b2ca4512.../172.17.8.101	active	running
todo@1.service			3408f7ab.../172.17.8.103	active	running
todo@2.service			db577263.../172.17.8.102	active	running
todo@3.service			b2ca4512.../172.17.8.101	active	running



$ journalctl -f --lines=50 -u haproxy



http://172.17.8.101/
http://172.17.8.102/
http://172.17.8.103/

Все работает!

Если нужно остановить и выгрузить все, что касается сервиса:

$ fleetctl stop haproxy.service
$ fleetctl unload haproxy.service
$ fleetctl destroy haproxy.service