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health.go
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health.go
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package health
import (
"context"
"net/http"
"os"
log "github.com/F5Networks/k8s-bigip-ctlr/v2/pkg/vlogger"
"k8s.io/client-go/kubernetes"
)
const (
clusterHealthPath = "/readyz"
)
type HealthChecker struct {
SubPID int
}
func (hc HealthChecker) CISHealthCheckHandler(kubeClient kubernetes.Interface) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if kubeClient != nil {
var response string
// Check if kube-api server is reachable
_, err := kubeClient.Discovery().RESTClient().Get().AbsPath(clusterHealthPath).DoRaw(context.TODO())
if err != nil {
response = "kube-api server is not reachable."
}
if err == nil {
w.WriteHeader(http.StatusOK)
w.Write([]byte("Ok"))
} else {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(response))
}
}
})
}
func (hc HealthChecker) HealthCheckHandler() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if hc.SubPID != 0 {
_, err := os.FindProcess(hc.SubPID)
if err == nil {
// assume that Python process is still running
w.WriteHeader(http.StatusOK)
w.Write([]byte("Ok"))
return
}
log.Errorf(err.Error())
}
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Python process is dead"))
})
}