| // Licensed to Apache Software Foundation (ASF) under one or more contributor |
| // license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright |
| // ownership. Apache Software Foundation (ASF) licenses this file to you 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 healthcheck |
| |
| import ( |
| "context" |
| "crypto/tls" |
| "time" |
| |
| "github.com/apache/skywalking-cli/internal/logger" |
| |
| "google.golang.org/grpc" |
| "google.golang.org/grpc/codes" |
| "google.golang.org/grpc/credentials" |
| healthpb "google.golang.org/grpc/health/grpc_health_v1" |
| "google.golang.org/grpc/status" |
| ) |
| |
| const ( |
| Healthy = 0 |
| ConnectionFailure = 1 |
| RPCFailure = 2 |
| Unhealthy = 3 |
| ) |
| |
| func HealthCheck(addr string, enableTLS bool) int { |
| ctx := context.Background() |
| |
| opts := []grpc.DialOption{ |
| grpc.WithUserAgent("swctl_health_probe"), |
| grpc.WithBlock()} |
| if enableTLS { |
| // #nosec |
| creds := credentials.NewTLS(&tls.Config{ |
| InsecureSkipVerify: true, |
| }) |
| opts = append(opts, grpc.WithTransportCredentials(creds)) |
| } else { |
| opts = append(opts, grpc.WithInsecure()) |
| } |
| dialCtx, cancel := context.WithTimeout(ctx, time.Second) |
| defer cancel() |
| conn, err := grpc.DialContext(dialCtx, addr, opts...) |
| if err != nil { |
| if err == context.DeadlineExceeded { |
| logger.Log.Printf("timeout: failed to connect service %q within 1 second", addr) |
| } else { |
| logger.Log.Printf("error: failed to connect service at %q: %+v", addr, err) |
| } |
| return ConnectionFailure |
| } |
| defer conn.Close() |
| |
| rpcCtx, rpcCancel := context.WithTimeout(ctx, time.Second) |
| defer rpcCancel() |
| resp, err := healthpb.NewHealthClient(conn).Check(rpcCtx, &healthpb.HealthCheckRequest{Service: ""}) |
| if err != nil { |
| if stat, ok := status.FromError(err); ok && stat.Code() == codes.DeadlineExceeded { |
| logger.Log.Printf("timeout: health request did not complete within 1 second") |
| } else { |
| logger.Log.Printf("error: health request failed: %+v", err) |
| } |
| return RPCFailure |
| } |
| |
| if resp.GetStatus() != healthpb.HealthCheckResponse_SERVING { |
| logger.Log.Printf("OAP gRPC service is unhealthy %q", resp.GetStatus().String()) |
| return Unhealthy |
| } |
| return Healthy |
| } |