byrd

Baker

Baker is a simple deployment tool based on Fabric. The config file format is inspired (but not identical) by Sup, but contrary to sup, Baker is meant to be invoked from any OS (aka Windows support).

Basic Example

By default baker will use bk.yaml as config file:

networks:
  web:
    hosts:
      - web1.example.com
      - web2.example.com
  db:
    hosts:
      - db1.example.com
      - db2.example.com

tasks:
  health:
    desc: Get basic health info
    run: uptime

  time:
    desc: Print current time (on local machine)
    local: date -Iseconds
    once: true

Based on the above file, one can run the following operations (imagine that the INFO lines are colored):

$ bk -c examples/bk1.yaml
INFO:2018-08-01 23:14:05: Load config examples/bk1.yaml
[23:14:05] bch@aldebaran:~/dev/baker$ bk -c examples/bk1.yaml time
INFO:2018-08-01 23:14:21: Load config examples/bk1.yaml
INFO:2018-08-01 23:14:21: RUN time locally
2018-08-01T23:14:21+02:00
$ bk -c examples/bk1.yaml health web
INFO:2018-08-01 23:14:25: Load config examples/bk1.yaml
INFO:2018-08-01 23:14:25: RUN health ON web1.example.com
 23:14:26 up 7 days,  6:28,  4 users,  load average: 0,30, 0,26, 0,22
INFO:2018-08-01 23:14:26: RUN health ON web2.example.com
  23:14:26 up 7 days,  6:28,  4 users,  load average: 0,30, 0,26, 0,22

Multi-tasks

The following example shows how Baker handles environment variables, and how to assemble tasks.

tasks:
  echo:
    desc: Simple echo
    local: echo "{what}"
    once: true
    env:
      what: "ECHO!"

  echo-var:
    desc: Echo an env variable
    local: echo {my_var}
    once: true
    
  both:
    desc: Run both tasks
    multi:
      - task: echo
        export: my_var  # tells baker to use task ouput to set my_var
      - task: echo-var

We can then do the following:

$ bk -c examples/bk2.yaml both                
INFO:2018-08-01 23:00:37: Load config examples/bk2.yaml
INFO:2018-08-01 23:00:37: RUN echo locally
ECHO!
INFO:2018-08-01 23:00:37: RUN echo-var locally
ECHO!
$ bk -c examples/bk2.yaml both -e what="WHAT?"
INFO:2018-08-01 23:01:15: Load config examples/bk2.yaml
INFO:2018-08-01 23:01:15: RUN echo locally
WHAT?
INFO:2018-08-01 23:01:15: RUN echo-var locally
WHAT?