A process supervisor (similar to python's supervisord) implemented in Crystal.
crystal build src/sv.cr
sv is expected to be run from a directory which has the following structure:
.
├── config
│ ├── jobs.yml
│ └── sv.yml
├── log
└── tmp
sv needs the following config files to run:
config/jobs.yml: used to declare job/process definitions like command, working_dir, arguments, env etcconfig/sv.yml: used to specify no. of job instances and job config overrides.
-
To start the supervisor along with the process defined in jobs.yml/sv.yml use:
sv rr -
To check status use:
sv status -
To shutdown the supervisor and all the managed processes use:
sv shutdown -
To see all available commands use
sv help
A demo/ directory is included in the git repo. It includes
- two shell scripts app-a, app-b which logs some text to stdout/stderr in a loop.
- preconfigured
config/jobs.ymlandconfig/sv.ymlwhich use the above scripts.
To run the demo:
$ cd demo
$ ../sv rr # to start sv
$ ../sv status # to see sv status
$ ../sv shutdown