watchParentProcess terminates this agent process when its parent keploy client (clientPID) goes away. clientPID is a real process id: the launcher passes the client's os.Getpid() via --client-pid (see pkg/platform/http/agent.go and docker/util.go), and it is consumed as a pid elsewhere too (/proc/<
(ctx context.Context, logger *zap.Logger, clientPID int)
| 40 | // the agent is usually launched under (whose death PDEATHSIG would otherwise |
| 41 | // track instead of the real CLI). No-op when clientPID <= 0. |
| 42 | func watchParentProcess(ctx context.Context, logger *zap.Logger, clientPID int) { |
| 43 | if logger != nil { |
| 44 | logger.Debug("arming parent-death watchdog", zap.Int("clientPID", clientPID)) |
| 45 | } |
| 46 | if clientPID <= 0 { |
| 47 | return |
| 48 | } |
| 49 | go func() { |
| 50 | ticker := time.NewTicker(watchParentInterval) |
| 51 | defer ticker.Stop() |
| 52 | for { |
| 53 | select { |
| 54 | case <-ctx.Done(): |
| 55 | return |
| 56 | case <-ticker.C: |
| 57 | if !parentAlive(clientPID) { |
| 58 | if logger != nil { |
| 59 | logger.Info("parent client process exited; self-terminating to release eBPF hooks, DNS and ports", |
| 60 | zap.Int("clientPID", clientPID)) |
| 61 | } |
| 62 | // Reuse the normal signal-driven graceful shutdown. |
| 63 | _ = syscall.Kill(os.Getpid(), syscall.SIGTERM) |
| 64 | return |
| 65 | } |
| 66 | } |
| 67 | } |
| 68 | }() |
| 69 | } |
| 70 | |
| 71 | // parentAlive reports whether process pid still exists. Signal 0 performs error |
| 72 | // checking without sending a signal: ESRCH => the process is gone; any other |