2021-09-21 22:36:50 +00:00
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# pmux
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A dumb simple user-space process manager, for use in composing multiple
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processes together into a single runable frontend.
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Features include (and are limited to):
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* Coalesces all stdout and stderr streams of all sub-processes into a single
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stdout stream (with timestamps and process names prefixing each line).
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* Propagates interrupt signal to sub-processes, and waits a configurable amount
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of time before SIGKILLing those which don't exit themselves.
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* Will restart processes which unexpectedly exit, with an exponential backoff
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delay for those which repeatedly exit.
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* Configurable timestamp format.
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That's it. If it's not listed then pmux can't do it.
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## Usage
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To build you just `go build .` within the directory.
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To run you do `pmux -c pmux.yml`. If `-c` isn't provided then pmux will look for
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`pmux.yml` in the pwd. A config file is required.
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## Example
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This repo contains [an example config file](pmux-example.yml), which shows off
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all possible configuration options.
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2021-09-22 01:10:22 +00:00
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The stdoutput from this example config looks something like this:
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2021-09-21 22:36:50 +00:00
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```
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2022-02-27 18:12:26 +00:00
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stubborn-pinger ~ starting process
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pinger ~ starting process
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stubborn-pinger › PING example.com (93.184.216.34) 56(84) bytes of data.
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stubborn-pinger › 64 bytes from 93.184.216.34 (93.184.216.34): icmp_seq=1 ttl=54 time=9.54 ms
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stubborn-pinger ›
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stubborn-pinger › --- example.com ping statistics ---
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stubborn-pinger › 1 packets transmitted, 1 received, 0% packet loss, time 0ms
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stubborn-pinger › rtt min/avg/max/mdev = 9.541/9.541/9.541/0.000 ms
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pinger › PING example.com (93.184.216.34) 56(84) bytes of data.
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pinger › 64 bytes from 93.184.216.34 (93.184.216.34): icmp_seq=1 ttl=54 time=9.53 ms
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pinger ›
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pinger › --- example.com ping statistics ---
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pinger › 1 packets transmitted, 1 received, 0% packet loss, time 0ms
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pinger › rtt min/avg/max/mdev = 9.533/9.533/9.533/0.000 ms
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pinger › PING example.com (93.184.216.34) 56(84) bytes of data.
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pinger › 64 bytes from 93.184.216.34 (93.184.216.34): icmp_seq=1 ttl=54 time=11.4 ms
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pinger ›
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pinger › --- example.com ping statistics ---
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pinger › 1 packets transmitted, 1 received, 0% packet loss, time 0ms
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pinger › rtt min/avg/max/mdev = 11.435/11.435/11.435/0.000 ms
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stubborn-pinger › PING example.com (93.184.216.34) 56(84) bytes of data.
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stubborn-pinger › 64 bytes from 93.184.216.34 (93.184.216.34): icmp_seq=1 ttl=54 time=11.2 ms
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stubborn-pinger ›
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stubborn-pinger › --- example.com ping statistics ---
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stubborn-pinger › 1 packets transmitted, 1 received, 0% packet loss, time 0ms
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stubborn-pinger › rtt min/avg/max/mdev = 11.161/11.161/11.161/0.000 ms
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... Ctrl-C ...
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pmux ~ interrupt signal received, killing all sub-processes
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stubborn-pinger » i will never stop, you will have to SIGKILL me!
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pinger ~ exit code -1, process exited: signal: interrupt
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pinger ~ stopped process handler
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stubborn-pinger › PING example.com (93.184.216.34) 56(84) bytes of data.
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stubborn-pinger › 64 bytes from 93.184.216.34 (93.184.216.34): icmp_seq=1 ttl=54 time=14.8 ms
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stubborn-pinger ›
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stubborn-pinger › --- example.com ping statistics ---
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stubborn-pinger › 1 packets transmitted, 1 received, 0% packet loss, time 0ms
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stubborn-pinger › rtt min/avg/max/mdev = 14.793/14.793/14.793/0.000 ms
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stubborn-pinger ~ forcefully killing process
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stubborn-pinger ~ exit code -1, process exited: signal: killed
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stubborn-pinger ~ stopped process handler
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pmux ~ exited gracefully, ciao!
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2021-09-21 22:36:50 +00:00
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```
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