CoreOS and EC2 Cheat Sheet

A cheat sheet in English by protomouse

12,446 views 3,702 downloads 6 May 2015 History

PRs

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Legend

	Local command
	Remote command

Cluster Management

Listing machines

fleetctl list-machines

Submit new unit file

fleetctl submit myapp@.service

List submitted unit files

fleetctl list-unit-files

List units and their status

fleetctl list-units

Start/stop units

fleetctl start myapp@1 fleetctl stop myapp@1

Removing unit files

fleetctl unload myapp@1 fleetctl destroy myapp@1.service fleetctl destroy myapp@.service

Opening a remote shell (*)

fleetctl ssh myapp@1

Inspecting the logs (*)

fleetctl journal --lines=100 myapp@1

Log monitoring (*)

fleetctl journal -f myapp@1

Each command must specify an etcd endpoint (--endpoint=http://1.2.3.4:4001). This can be the IP address of any machine in the cluster.

(*) A running SSH agent is required for these commands.

Unit Management

Stop unit

sudo systemctl restart myapp@1

Start unit

sudo systemctl start myapp@1

Stop unit

sudo systemctl stop myapp@1

View unit status

sudo systemctl status myapp@1

List active units

sudo systemctl

Container Management

List running containers

docker ps

List all containers

docker ps -a

List images

docker images

Start/stop a container

docker start CONTAINER_ID docker stop CONTAINER_ID

Create and run a container

docker run -e FOO=bar IMAGE_ID

Delete a container

docker rm CONTAINER_ID

Delete an image

docker rmi IMAGE_ID

Log Management

Inspect unit logs

journalctl -u myapp@1

Filter out older log entries

journalctl --since=2015-07-03 11:33:22"

Filter out newer log entries

journalctl --until=2015-07-03 11:33:22"

Instance Management

List instances

aws ec2 describe-instances

Stop an instance (*)

aws ec2 stop-instances --instance-ids ID

Start an instance

aws ec2 start-instances --instance-ids ID

Reboot an instance

aws ec2 reboot-instances --instance-ids ID

Terminate an instance (**)

aws ec2 terminate-instances --instance-ids ID

The AWS client supports fine-grained output formatting. Use the table format (--output table) and a query string:
--query 'Reservations[].Instances[].[Tags[?Key==`Name`] | [0].Value, InstanceId, State.Name, Placement.AvailabilityZone]

(*) Data on ephemeral storage (e.g. containers and images) will be lost!

(**) Data on block- (the root file system) and ephemeral storage will be lost!

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