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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,201 @@ | ||
| // Copyright 2021 The Prometheus Authors | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package prober | ||
|
|
||
| import ( | ||
| "context" | ||
| "github.com/go-kit/kit/log" | ||
| "github.com/go-kit/kit/log/level" | ||
| "github.com/prometheus/blackbox_exporter/config" | ||
| "github.com/prometheus/client_golang/prometheus" | ||
| pconfig "github.com/prometheus/common/config" | ||
| "google.golang.org/grpc" | ||
| "google.golang.org/grpc/codes" | ||
| "google.golang.org/grpc/credentials" | ||
| "google.golang.org/grpc/health/grpc_health_v1" | ||
| "google.golang.org/grpc/peer" | ||
| "google.golang.org/grpc/status" | ||
| "net" | ||
| "net/url" | ||
| "strings" | ||
| ) | ||
|
|
||
| // Health defines a health-check connection. | ||
| type Health interface { | ||
| Check(c context.Context) (bool, codes.Code, *peer.Peer, error) | ||
| } | ||
|
|
||
| type healthClient struct { | ||
| client grpc_health_v1.HealthClient | ||
| conn *grpc.ClientConn | ||
| } | ||
|
|
||
| func NewGrpcHealthClient(conn *grpc.ClientConn) Health { | ||
| client := new(healthClient) | ||
| client.client = grpc_health_v1.NewHealthClient(conn) | ||
| client.conn = conn | ||
| return client | ||
| } | ||
|
|
||
| func (c *healthClient) Close() error { | ||
| return c.conn.Close() | ||
| } | ||
|
|
||
| func (c *healthClient) Check(ctx context.Context) (bool, codes.Code, *peer.Peer, error) { | ||
| var res *grpc_health_v1.HealthCheckResponse | ||
| var err error | ||
| req := new(grpc_health_v1.HealthCheckRequest) | ||
|
|
||
| serverPeer := new(peer.Peer) | ||
| res, err = c.client.Check(ctx, req, grpc.Peer(serverPeer)) | ||
| if err == nil { | ||
| if res.GetStatus() == grpc_health_v1.HealthCheckResponse_SERVING { | ||
| return true, codes.OK, serverPeer, nil | ||
| } | ||
| return false, codes.OK, serverPeer, nil | ||
| } | ||
|
|
||
| returnStatus, _ := status.FromError(err) | ||
|
|
||
| return false, returnStatus.Code(), nil, err | ||
| } | ||
|
|
||
| func ProbeGRPC(ctx context.Context, target string, module config.Module, registry *prometheus.Registry, logger log.Logger) (success bool) { | ||
|
|
||
| var ( | ||
| durationGaugeVec = prometheus.NewGaugeVec(prometheus.GaugeOpts{ | ||
| Name: "probe_grpc_duration_seconds", | ||
| Help: "Duration of gRPC request by phase", | ||
| }, []string{"phase"}) | ||
|
|
||
| isSSLGauge = prometheus.NewGauge(prometheus.GaugeOpts{ | ||
| Name: "probe_grpc_ssl", | ||
| Help: "Indicates if SSL was used for the connection", | ||
| }) | ||
|
|
||
| statusCodeGauge = prometheus.NewGauge(prometheus.GaugeOpts{ | ||
| Name: "probe_grpc_status_code", | ||
| Help: "Response gRPC status code", | ||
| }) | ||
|
|
||
| probeSSLEarliestCertExpiryGauge = prometheus.NewGauge(prometheus.GaugeOpts{ | ||
| Name: "probe_ssl_earliest_cert_expiry", | ||
| Help: "Returns earliest SSL cert expiry in unixtime", | ||
| }) | ||
|
|
||
| probeTLSVersion = prometheus.NewGaugeVec(prometheus.GaugeOpts{ | ||
| Name: "probe_tls_version_info", | ||
| Help: "Contains the TLS version used", | ||
| }, | ||
| []string{"version"}, | ||
| ) | ||
| ) | ||
|
|
||
| for _, lv := range []string{"resolve"} { | ||
| durationGaugeVec.WithLabelValues(lv) | ||
| } | ||
|
|
||
| registry.MustRegister(durationGaugeVec) | ||
| registry.MustRegister(isSSLGauge) | ||
| registry.MustRegister(statusCodeGauge) | ||
| registry.MustRegister(probeSSLEarliestCertExpiryGauge) | ||
| registry.MustRegister(probeTLSVersion) | ||
|
|
||
| if !strings.HasPrefix(target, "http://") && !strings.HasPrefix(target, "https://") { | ||
| target = "http://" + target | ||
| } | ||
|
|
||
| targetURL, err := url.Parse(target) | ||
| if err != nil { | ||
| level.Error(logger).Log("msg", "Could not parse target URL", "err", err) | ||
| return false | ||
| } | ||
|
|
||
| targetHost, targetPort, err := net.SplitHostPort(targetURL.Host) | ||
| // If split fails, assuming it's a hostname without port part. | ||
| if err != nil { | ||
| targetHost = targetURL.Host | ||
| } | ||
|
|
||
| tlsConfig, err := pconfig.NewTLSConfig(&module.GRPC.TLSConfig) | ||
| if err != nil { | ||
| level.Error(logger).Log("msg", "Error creating TLS configuration", "err", err) | ||
| return false | ||
| } | ||
|
|
||
| ip, lookupTime, err := chooseProtocol(ctx, module.GRPC.PreferredIPProtocol, module.GRPC.IPProtocolFallback, targetHost, registry, logger) | ||
| if err != nil { | ||
| level.Error(logger).Log("msg", "Error resolving address", "err", err) | ||
| return false | ||
| } | ||
| durationGaugeVec.WithLabelValues("resolve").Add(lookupTime) | ||
|
|
||
| if len(tlsConfig.ServerName) == 0 { | ||
| // If there is no `server_name` in tls_config, use | ||
| // the hostname of the target. | ||
| tlsConfig.ServerName = targetHost | ||
| } | ||
|
|
||
| if targetPort == "" { | ||
| targetURL.Host = "[" + ip.String() + "]" | ||
| } else { | ||
| targetURL.Host = net.JoinHostPort(ip.String(), targetPort) | ||
| } | ||
|
|
||
| var opts []grpc.DialOption | ||
| target = targetHost + ":" + targetPort | ||
| if !module.GRPC.TLS { | ||
| level.Debug(logger).Log("msg", "Dialing GRPC without TLS") | ||
| opts = append(opts, grpc.WithInsecure()) | ||
| if len(targetPort) == 0 { | ||
| target = targetHost + ":80" | ||
| } | ||
| } else { | ||
| creds := credentials.NewTLS(tlsConfig) | ||
| opts = append(opts, grpc.WithTransportCredentials(creds)) | ||
| if len(targetPort) == 0 { | ||
| target = targetHost + ":443" | ||
| } | ||
| } | ||
|
|
||
| conn, err := grpc.Dial(target, opts...) | ||
|
|
||
| if err != nil { | ||
| level.Error(logger).Log("did not connect: %v", err) | ||
| } | ||
|
|
||
| client := NewGrpcHealthClient(conn) | ||
| defer conn.Close() | ||
| ok, statusCode, serverPeer, err := client.Check(context.Background()) | ||
|
|
||
| tlsInfo, tlsOk := serverPeer.AuthInfo.(credentials.TLSInfo) | ||
| if tlsOk { | ||
| isSSLGauge.Set(float64(1)) | ||
| probeSSLEarliestCertExpiryGauge.Set(float64(getEarliestCertExpiry(&tlsInfo.State).Unix())) | ||
| probeTLSVersion.WithLabelValues(getTLSVersion(&tlsInfo.State)).Set(1) | ||
| } else { | ||
| isSSLGauge.Set(float64(0)) | ||
| } | ||
| statusCodeGauge.Set(float64(statusCode)) | ||
|
|
||
| if !ok || err != nil { | ||
| level.Error(logger).Log("msg", "can't connect grpc server:", "err", err) | ||
| success = false | ||
| } else { | ||
| level.Debug(logger).Log("connect the grpc server successfully") | ||
| success = true | ||
| } | ||
|
|
||
| return | ||
| } |
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