GetContainerHealth retrieves the health status of a given container. returns status, most-recent-log The container is only considered "healthy" if it's also "running", contrary to Docker's normal usage
(c *container.Summary)
| 468 | // returns status, most-recent-log |
| 469 | // The container is only considered "healthy" if it's also "running", contrary to Docker's normal usage |
| 470 | func GetContainerHealth(c *container.Summary) (string, string) { |
| 471 | if c == nil { |
| 472 | return "no container", "" |
| 473 | } |
| 474 | |
| 475 | // If the container is not running, then return exited as the health. |
| 476 | // "exited" means stopped. |
| 477 | cState := string(c.State) |
| 478 | if cState == string(container.StateExited) || cState == string(container.StateRestarting) { |
| 479 | return cState, "" |
| 480 | } |
| 481 | |
| 482 | ctx, apiClient, err := GetDockerClient() |
| 483 | if err != nil { |
| 484 | return "", "" |
| 485 | } |
| 486 | inspect, err := apiClient.ContainerInspect(ctx, c.ID, client.ContainerInspectOptions{}) |
| 487 | if err != nil { |
| 488 | output.UserOut.Warnf("Error getting container to inspect: %v", err) |
| 489 | return "", "" |
| 490 | } |
| 491 | |
| 492 | logOutput := "" |
| 493 | status := "" |
| 494 | if inspect.Container.State.Health != nil { |
| 495 | status = string(inspect.Container.State.Health.Status) |
| 496 | } |
| 497 | // The last log is the most recent |
| 498 | if status != "" { |
| 499 | numLogs := len(inspect.Container.State.Health.Log) |
| 500 | if numLogs > 0 { |
| 501 | logOutput = fmt.Sprintf("%v", inspect.Container.State.Health.Log[numLogs-1].Output) |
| 502 | } |
| 503 | // A container can't be healthy if it's not running. |
| 504 | // Docker/Podman may cache the last health status even after state changes. |
| 505 | if inspect.Container.State.Status != container.StateRunning { |
| 506 | // Return actual state for known non-running states |
| 507 | switch inspect.Container.State.Status { |
| 508 | case container.StateExited, container.StateRestarting: |
| 509 | status = string(inspect.Container.State.Status) |
| 510 | default: |
| 511 | // For other non-running states, override cached health to unhealthy |
| 512 | status = string(container.Unhealthy) |
| 513 | } |
| 514 | } |
| 515 | } else { |
| 516 | // Some containers may not have a healthcheck. In that case |
| 517 | // we use State to determine health |
| 518 | switch inspect.Container.State.Status { |
| 519 | case container.StateRunning: |
| 520 | status = string(container.Healthy) |
| 521 | case container.StateExited: |
| 522 | status = string(container.StateExited) |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | return status, strings.TrimSpace(logOutput) |
| 527 | } |