The caretakerd from echocat

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caretakerd is a minimal process supervisor. There are no external dependencies and is optimized for containerization (such as Docker) and simple configuration.

License: Other

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Panic on shutdown

Hi. I'm testing caretakerd on some Docker containers, which has some very nice features (especially being able to spawn and control several process, and cron jobs !). I'm using tini as entrypoint, which in turn launch caretakerd with this simple config

logger:
  level: debug
services:
  lemonldap:
    type: master
    command: ["lemonldap-ng"]
  local_cache:
    command: ["/usr/libexec/lemonldap-ng/bin/purgeLocalCache"]
    cronExpression: '1 * * * *'
  nginx:
    command: ["nginx", "-c", "${LLNG_NGINX_CONF}"]

Everything is working, but sometime (not always), caretakerd panic when the container shuts down

panic: send on closed channel [recovered]
	panic: send on closed channel

goroutine 29 [running]:
github.com/echocat/caretakerd/sync.(*Mutex).Lock.func1()
	/home/runner/work/caretakerd/caretakerd/sync/mutex.go:44 +0x16a
panic({0x882820, 0x9a7b20})
	/opt/hostedtoolcache/go/1.20.1/x64/src/runtime/panic.go:884 +0x213
github.com/echocat/caretakerd/sync.(*Mutex).Lock(0xc000056b70?)
	/home/runner/work/caretakerd/caretakerd/sync/mutex.go:49 +0x87
github.com/echocat/caretakerd/sync.(*Condition).doLock(...)
	/home/runner/work/caretakerd/caretakerd/sync/condition.go:57
github.com/echocat/caretakerd/sync.(*Condition).wait.func1()
	/home/runner/work/caretakerd/caretakerd/sync/condition.go:42 +0x25
github.com/echocat/caretakerd/sync.(*Condition).wait(0xc000012078, 0x1?, 0x1)
	/home/runner/work/caretakerd/caretakerd/sync/condition.go:52 +0x19a
github.com/echocat/caretakerd/sync.(*Condition).Wait(...)
	/home/runner/work/caretakerd/caretakerd/sync/condition.go:34
github.com/echocat/caretakerd/service.(*Execution).Stop(0xc00006e0c0)
	/home/runner/work/caretakerd/caretakerd/service/execution.go:310 +0x1bc
github.com/echocat/caretakerd.(*Execution).Stop(0xc0000ceff0, 0xc000128700)
	/home/runner/work/caretakerd/caretakerd/execution.go:273 +0xb5
github.com/echocat/caretakerd.(*Execution).stopOthers.func1(0x0?)
	/home/runner/work/caretakerd/caretakerd/execution.go:193 +0x4a
created by github.com/echocat/caretakerd.(*Execution).stopOthers
	/home/runner/work/caretakerd/caretakerd/execution.go:192 +0x8b

I'm running latest caretakerd (1.0.7) and my container is based on almalinux 9

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