[O’Reilly Media / Infinite Skills] Introduction to CoreOS Training Video [2015, ENG] : Launching A Development CoreOS Cluster : Starting Units with Fleet

Statring Units with Fleet

$ ssh-add ~/.vagrant.d/insecure_private_key


$ vagrant ssh core-01 -- -A


$ fleetctl list-machines  
MACHINE		IP		METADATA
3408f7ab...	172.17.8.103	-
b2ca4512...	172.17.8.101	-
db577263...	172.17.8.102	-


$ fleetctl list-unit-files
UNIT	HASH	DSTATE	STATE	TARGET


$ fleetctl list-units
UNIT	MACHINE	ACTIVE	SUB


# vi ~/hellofleet.service

[Unit]
Description=Hello Fleet Service
After=docker.service
Requires=docker.service

[Service]
TimeoutStartSec=0
ExecStartPre=-/usr/bin/docker kill hello-fleet
ExecStartPre=-/usr/bin/docker rm hello-fleet
ExecStartPre=/usr/bin/docker pull busybox
ExecStart=/usr/bin/docker run --name hello-fleet busybox /bin/sh -c "while true; do echo Hello Fleet; sleep 1; done"
ExecStop=-/usr/bin/docker rm -f hello-fleet


$ fleetctl submit hellofleet.service
Unit hellofleet.service inactive


$ fleetctl list-unit-files
UNIT			HASH	DSTATE		STATE		TARGET
hellofleet.service	9b0408f	inactive	inactive	-


$ fleetctl cat hellofleet.service


$ fleetctl load hellofleet.service
Unit hellofleet.service loaded on 3408f7ab.../172.17.8.103


$ fleetctl list-units     
UNIT			MACHINE				ACTIVE		SUB
hellofleet.service	3408f7ab.../172.17.8.103	inactive	dead


$ fleetctl start hellofleet
Unit hellofleet.service launched on 3408f7ab.../172.17.8.103


$ fleetctl list-units
UNIT			MACHINE				ACTIVE	SUB
hellofleet.service	3408f7ab.../172.17.8.103	active	running


$ fleetctl status hellofleet
The authenticity of host '172.17.8.103' can't be established.
ECDSA key fingerprint is c2:8e:3f:50:c5:20:db:7a:6d:91:4b:73:fc:a8:f8:41.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '172.17.8.103' (ECDSA) to the list of known hosts.
● hellofleet.service - Hello Fleet Service
   Loaded: loaded (/run/fleet/units/hellofleet.service; linked-runtime; vendor p
   Active: active (running) since Sun 2016-11-27 01:09:16 UTC; 1min 2s ago
  Process: 1392 ExecStartPre=/usr/bin/docker pull busybox (code=exited, status=0
  Process: 1387 ExecStartPre=/usr/bin/docker rm hello-fleet (code=exited, status
  Process: 1292 ExecStartPre=/usr/bin/docker kill hello-fleet (code=exited, stat
 Main PID: 1405 (docker)
    Tasks: 7
   Memory: 24.4M
      CPU: 127ms
   CGroup: /system.slice/hellofleet.service
           └─1405 /usr/bin/docker run --name hello-fleet busybox /bin/sh -c whil

Nov 27 01:10:09 core-03 docker[1405]: Hello Fleet
Nov 27 01:10:10 core-03 docker[1405]: Hello Fleet
Nov 27 01:10:11 core-03 docker[1405]: Hello Fleet
Nov 27 01:10:12 core-03 docker[1405]: Hello Fleet
Nov 27 01:10:13 core-03 docker[1405]: Hello Fleet
Nov 27 01:10:14 core-03 docker[1405]: Hello Fleet
Nov 27 01:10:15 core-03 docker[1405]: Hello Fleet
Nov 27 01:10:16 core-03 docker[1405]: Hello Fleet
Nov 27 01:10:17 core-03 docker[1405]: Hello Fleet
Nov 27 01:10:18 core-03 docker[1405]: Hello Fleet


$ fleetctl journal hellofleet
-- Logs begin at Mon 2016-11-21 19:43:59 UTC, end at Sun 2016-11-27 01:11:39 UTC. --
Nov 27 01:11:30 core-03 docker[1405]: Hello Fleet
Nov 27 01:11:31 core-03 docker[1405]: Hello Fleet
Nov 27 01:11:32 core-03 docker[1405]: Hello Fleet
Nov 27 01:11:33 core-03 docker[1405]: Hello Fleet
Nov 27 01:11:34 core-03 docker[1405]: Hello Fleet
Nov 27 01:11:35 core-03 docker[1405]: Hello Fleet
Nov 27 01:11:36 core-03 docker[1405]: Hello Fleet
Nov 27 01:11:37 core-03 docker[1405]: Hello Fleet
Nov 27 01:11:38 core-03 docker[1405]: Hello Fleet
Nov 27 01:11:39 core-03 docker[1405]: Hello Fleet


$ fleetctl journal -f hellofleet


$ fleetctl stop hellofleet.service


$ fleetctl list-units     
UNIT			MACHINE				ACTIVE	SUB
hellofleet.service	3408f7ab.../172.17.8.103	failed	failed


$ fleetctl unload hellofleet.service


$ fleetctl destroy hellofleet.service