Stack Up is a simple deployment tool that performs given set of commands on multiple hosts in parallel. It reads Supfile, a YAML configuration file, which defines networks (groups of hosts), commands and targets.
Note: Demo is based on this example Supfile.
$ go get -u github.com/pressly/sup/cmd/sup
$ sup [OPTIONS] NETWORK COMMAND [...]
||Custom path to Supfile|
||Set environment variables|
||Filter hosts matching regexp|
||Filter out hosts matching regexp|
||Enable debug/verbose mode|
||Disable hostname prefix|
A group of hosts.
# Supfile networks: production: hosts: - api1.example.com - api2.example.com - api3.example.com staging: # fetch dynamic list of hosts inventory: curl http://example.com/latest/meta-data/hostname
$ sup production COMMAND will run COMMAND on
api3 hosts in parallel.
A shell command(s) to be run remotely.
# Supfile commands: restart: desc: Restart example Docker container run: sudo docker restart example tail-logs: desc: Watch tail of Docker logs from all hosts run: sudo docker logs --tail=20 -f example
$ sup staging restart will restart all staging Docker containers in parallel.
$ sup production tail-logs will tail Docker logs from all production containers in parallel.
Serial command (a.k.a. Rolling Update)
serial: N constraints a command to be run on
N hosts at a time at maximum. Rolling Update for free!
# Supfile commands: restart: desc: Restart example Docker container run: sudo docker restart example serial: 2
$ sup production restart will restart all Docker containers, two at a time at maximum.
Once command (one host only)
once: true constraints a command to be run only on one host. Useful for one-time tasks.
# Supfile commands: build: desc: Build Docker image and push to registry run: sudo docker build -t image:latest . && sudo docker push image:latest once: true # one host only pull: desc: Pull latest Docker image from registry run: sudo docker pull image:latest
$ sup production build pull will build Docker image on one production host only and spread it to all hosts.
Runs command always on localhost.
# Supfile commands: prepare: desc: Prepare to upload local: npm run build
Uploads files/directories to all remote hosts. Uses
tar under the hood.
# Supfile commands: upload: desc: Upload dist files to all hosts upload: - src: ./dist dst: /tmp/
Interactive Bash on all hosts
Do you want to interact with multiple hosts at once? Sure!
# Supfile commands: bash: desc: Interactive Bash on all hosts stdin: true run: bash
$ sup production bash # # type in commands and see output from all hosts! # ^C
Passing prepared commands to all hosts:
$ echo 'sudo apt-get update -y' | sup production bash # or: $ sup production bash <<< 'sudo apt-get update -y' # or: $ cat <<EOF | sup production bash sudo apt-get update -y date uname -a EOF
Interactive Docker Exec on all hosts
# Supfile commands: exec: desc: Exec into Docker container on all hosts stdin: true run: sudo docker exec -i $CONTAINER bash
$ sup production exec ps aux strace -p 1 # trace system calls and signals on all your production hosts
Target is an alias for multiple commands. Each command will be run on all hosts in parallel,
sup will check return status from all hosts, and run subsequent commands on success only (thus any error on any host will interrupt the process).
# Supfile targets: deploy: - build - pull - migrate-db-up - stop-rm-run - health - slack-notify - airbrake-notify
$ sup production deploy
is equivalent to
$ sup production build pull migrate-db-up stop-rm-run health slack-notify airbrake-notify
See example Supfile.
# Supfile --- version: 0.4 # Global environment variables env: NAME: api IMAGE: example/api networks: local: hosts: - localhost staging: hosts: - stg1.example.com production: hosts: - api1.example.com - api2.example.com commands: echo: desc: Print some env vars run: echo $NAME $IMAGE $SUP_NETWORK date: desc: Print OS name and current date/time run: uname -a; date targets: all: - echo - date
Default environment variables available in Supfile
$SUP_HOST- Current host.
$SUP_NETWORK- Current network.
$SUP_USER- User who invoked sup command.
$SUP_TIME- Date/time of sup command invocation.
$SUP_ENV- Environment variables provided on sup command invocation. You can pass
dockercommands in your Supfile.
Running sup from Supfile
Supfile doesn't let you import another Supfile. Instead, it lets you run
sup sub-process from inside your Supfile. This is how you can structure larger projects:
./Supfile ./database/Supfile ./services/scheduler/Supfile
Top-level Supfile calls
sup with Supfiles from sub-projects:
restart-scheduler: desc: Restart scheduler local: > sup -f ./services/scheduler/Supfile $SUP_ENV $SUP_NETWORK restart db-up: desc: Migrate database local: > sup -f ./database/Supfile $SUP_ENV $SUP_NETWORK up
Common SSH Problem
if for some reason sup doesn't connect and you get the following error,
connecting to clients failed: connecting to remote host failed: Connect("[email protected]"): ssh: handshake failed: ssh: unable to authenticate, attempted methods [none publickey], no supported methods remain
it means that your
ssh-agent dosen't have access to your public and private keys. in order to fix this issue, follow the below instructions:
- run the following command and make sure you have a key register with
if you see something like
The agent has no identities. it means that you need to manually add your key to
ssh-agent. in order to do that, run the following command
you should now be able to use sup with your ssh key.
fork it, hack it.. $ make build create new Pull Request
We'll be happy to review & accept new Pull Requests!
Licensed under the MIT License.