fleet

Command an armada of processes in a cluster.

This module integrates with git using propagit, to make rolling out new code to a bunch of worker drones super simple!

install

With npm do:

npm install -g fleet

example

In a fresh directory, start a fleet hub:

$ fleet hub --port=7000 --secret=beepboop

in another fresh directory start a drone:

$ fleet drone --hub=localhost:7000 --secret=beepboop

You can start as many drones as you want in fresh directories.

Now from a git repo, set a remote:

$ fleet remote add default --hub=localhost:7000 --secret=beepboop

Now deploy your code to all the drones:

$ fleet deploy

Deploying just checks out your commit to a fresh directory on every drone.

To run a process on the latest commit do:

$ fleet spawn -- node beep.js 8080

To see the process list across all your drones do:

$ fleet ps

commands

fleet remote

This command creates and updates a file called fleet.json in your git project root so you don't need to type --hub and --secret all the time for the deploy, spawn, stop, and ps commands.

fleet remote add NAME=default --hub=HUB --secret=SECRET

Inspired by git remote.

fleet remote ls

List the remotes from your fleet.json.

fleet hub --port=PORT --secret=SECRET

Create a new hub listening on a port with a secret passphrase.

fleet drone --hub=HOST:PORT --secret=SECRET

Spin up a worker drone and connect to the hub.

fleet deploy

From a git directory, push the top commit from git log and check out the code on all the drones in an isolated directory based on the commit hash.

$ fleet deploy
deployed webapp/1b8050fcaf8f1b02b9175fcb422644cb67dc8cc5

fleet ps

List the processes running on all the drones.

$ fleet ps
drone#3dfe17b8
├─┬ pid#1e99f4
│ ├── status:   running
│ ├── commit:   webapp/1b8050fcaf8f1b02b9175fcb422644cb67dc8cc5
│ └── command:  node server.js 8888
└─┬ pid#d7048a
  ├── status:   running
  ├── commit:   webapp/1b8050fcaf8f1b02b9175fcb422644cb67dc8cc5
  └── command:  node server.js 8889

fleet spawn OPTIONS -- command...

Spin up command on a random drone.

You can control which drone by specifying --drone=id.

Your spawned process will get the $REPO name, $COMMIT hash, $DRONE_ID, and $PROCESS_ID as environment variables from propagit.

$ fleet spawn -- node server.js 8888
(spawned a25d7033#edc743)

fleet exec OPTIONS -- command...

Like fleet spawn except command doesn't restart itself and the output of the command is printed to the terminal.

Stop processes. Get each id by running fleet ps. It doesn't matter which drone the process is running on, fleet spams the request out to all the drones and ignores the request if the drone doesn't have the requested process id.

Leading 'pid#' strings are ignored on ids so you can more easily copy the pids from fleet ps output.

$ fleet stop 1e99f4 d7048a
[3dfe17b8] stopped 1e99f4 d7048a

fleet monitor

Show all spawn, exit, stdout, and stderr events happening everywhere across all of the drones.

$ fleet monitor
(spawned 3dfe17b8#1e99f4 : node server.js 8888)
[3dfe17b8#1e99f4] listening on :8888
(exited 3dfe17b8#751e9f : node server.js 8889)
(spawned 3dfe17b8#d7048a : node server.js 8889)

tblobaum / fleet