# MinIO Monitoring Guide

MinIO server exposes monitoring data over endpoints. Monitoring tools can pick the data from these endpoints. This document lists the monitoring endpoints and relevant documentation.

## Healthcheck Probe

MinIO server has two healthcheck related un-authenticated endpoints, a liveness probe to indicate if server is responding, cluster probe to check if server can be taken down for maintenance.

var errEtcdUnreachable = errors.New("etcd is unreachable, please check your endpoints")

func etcdErrToErr(err error, etcdEndpoints []string) error {
	if err == nil {
		return nil
	}
	switch err {
	case context.DeadlineExceeded:
		return fmt.Errorf("%w %s", errEtcdUnreachable, etcdEndpoints)
	default:
		return fmt.Errorf("unexpected error %w from etcd, please check your endpoints %s", err, etcdEndpoints)
	}
}

	for index := range disks {
		index := index
		g.Go(func() error {
			di := madmin.Disk{
				Endpoint:  endpoints[index].String(),
				PoolIndex: endpoints[index].PoolIdx,
				SetIndex:  endpoints[index].SetIdx,
				DiskIndex: endpoints[index].DiskIdx,
				Local:     endpoints[index].IsLocal,
			}
			if disks[index] == OfflineDisk {
				di.State = diskErrToDriveState(errDiskNotFound)

			wg.Add(1)
			go func(i int, endpoint Endpoint) {
				defer wg.Done()

				lk.Lock()
				// Only add lockers only one per endpoint and per erasure set.
				if locker, ok := erasureLockers[endpoint.Host]; ok && !lockerEpSet.Contains(endpoint.Host) {
					lockerEpSet.Add(endpoint.Host)
					s.erasureLockers[i] = append(s.erasureLockers[i], locker)
				}
				lk.Unlock()
			}(i, endpoints.Endpoints[i*setDriveCount+j])
		}
	}

					if result.Online {
						lastOnline = time.Now()
					}
					l := prev.latency
					l.update(time.Since(start))
					m[result.Endpoint.Host] = epHealth{
						Endpoint:        result.Endpoint.Host,
						Scheme:          result.Endpoint.Scheme,
						Online:          result.Online,
						lastOnline:      lastOnline,
						offlineDuration: offline,
						lastHCAt:        time.Now(),

type Status struct {
	Name      string   // The name of the KMS
	Endpoints []string // A set of the KMS endpoints

	// DefaultKey is the key used when no explicit key ID
	// is specified. It is empty if the KMS does not support
	// a default key.
	DefaultKey string

	// Details provides more details about the KMS endpoint status.
	// including uptime, version and available CPUs.
	// Could be more in future.
	Details kes.State
}

      "hostname": "namespace-istio-waypoint.bookinfo.svc.cluster.local",
      "vips": [
        "/10.96.65.117"
      ],
      "ports": {
        "15008": 15008,
        "15021": 15021
      },
      "endpoints": {
        "Kubernetes//Pod/bookinfo/namespace-istio-waypoint-d94944bf6-z89g2:/10.244.2.52": {
          "workloadUid": "Kubernetes//Pod/bookinfo/namespace-istio-waypoint-d94944bf6-z89g2",

	}
	wg.Wait()
}

// Initialize storage disks for each endpoint.
// Errors are returned for each endpoint with matching index.
func initStorageDisksWithErrors(endpoints Endpoints, opts storageOpts) ([]StorageAPI, []error) {
	// Bootstrap disks.
	storageDisks := make([]StorageAPI, len(endpoints))
	g := errgroup.WithNErrs(len(endpoints))
	for index := range endpoints {
		index := index
		g.Go(func() (err error) {

	}
	for i := range endpoints {
		endpoints[i].SetPoolIndex(poolIdx)
		endpoints[i].SetSetIndex(i / drivesPerSet)
		endpoints[i].SetDiskIndex(i % drivesPerSet)
	}
	return endpoints
}

func getEndpointsLocalAddr(endpointServerPools EndpointServerPools) string {
	for _, endpoints := range endpointServerPools {
		for _, endpoint := range endpoints.Endpoints {
			if endpoint.IsLocal && endpoint.Type() == URLEndpointType {

	var clnts []*bootstrapRESTClient
	for _, ep := range endpointServerPools {
		for _, endpoint := range ep.Endpoints {
			if endpoint.IsLocal {
				continue
			}
			if seenClient.Contains(endpoint.Host) {
				continue
			}
			seenClient.Add(endpoint.Host)
			clnts = append(clnts, &bootstrapRESTClient{gm.Connection(endpoint.GridHost())})
		}
	}
	return clnts