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adding probes... except they don't work as promised
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|---|---|---|
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@@ -16,3 +16,4 @@ | |
| # vendor/ | ||
| .vscode | ||
| memstore | ||
| memstore-*.tgz | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| // Implement kubernetes probes. | ||
| package probes | ||
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||
| import ( | ||
| "net/http" | ||
| "sync" | ||
|
|
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| "fortio.org/log" | ||
| ) | ||
|
|
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| type state struct { | ||
| started bool | ||
| live bool | ||
| ready bool | ||
| // mutex | ||
| mutex sync.Mutex | ||
| } | ||
|
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| var State = state{} | ||
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| func (s *state) SetLive(live bool) { | ||
| s.mutex.Lock() | ||
| s.live = live | ||
| s.mutex.Unlock() | ||
| } | ||
|
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| func (s *state) SetReady(ready bool) { | ||
| s.mutex.Lock() | ||
| s.ready = ready | ||
| s.mutex.Unlock() | ||
| } | ||
|
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| func (s *state) SetStarted(started bool) { | ||
| s.mutex.Lock() | ||
| s.started = started | ||
| s.mutex.Unlock() | ||
| } | ||
|
|
||
| func (s *state) IsLive() bool { | ||
| s.mutex.Lock() | ||
| defer s.mutex.Unlock() | ||
| return s.live | ||
| } | ||
|
|
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| func (s *state) IsReady() bool { | ||
| s.mutex.Lock() | ||
| defer s.mutex.Unlock() | ||
| return s.ready | ||
| } | ||
|
|
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| func (s *state) IsStarted() bool { | ||
| s.mutex.Lock() | ||
| defer s.mutex.Unlock() | ||
| return s.started | ||
| } | ||
|
|
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| func StartupProbe(w http.ResponseWriter, _ *http.Request) { | ||
| if State.IsStarted() { | ||
| w.WriteHeader(http.StatusOK) | ||
| } else { | ||
| w.WriteHeader(http.StatusServiceUnavailable) | ||
| } | ||
| } | ||
|
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| func LivenessProbe(w http.ResponseWriter, _ *http.Request) { | ||
| if State.IsLive() { | ||
| w.WriteHeader(http.StatusOK) | ||
| } else { | ||
| w.WriteHeader(http.StatusServiceUnavailable) | ||
| } | ||
| } | ||
|
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| func ReadinessProbe(w http.ResponseWriter, _ *http.Request) { | ||
| if State.IsReady() { | ||
| w.WriteHeader(http.StatusOK) | ||
| } else { | ||
| w.WriteHeader(http.StatusServiceUnavailable) | ||
| } | ||
| } | ||
|
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| func Setup(mux *http.ServeMux) { | ||
| mux.HandleFunc("/startup", log.LogAndCall("startup", StartupProbe)) | ||
| mux.HandleFunc("/ready", log.LogAndCall("readiness", ReadinessProbe)) | ||
| mux.HandleFunc("/health", log.LogAndCall("liveness", LivenessProbe)) | ||
| } |
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