k8s的startupProbe探针中initialDelaySeconds是否有效

 1    type Probe struct {
 2        // The action taken to determine the health of a container
 3        ProbeHandler
 4        // Length of time before health checking is activated.  In seconds.
 5        // +optional
 6        InitialDelaySeconds int32
 7        // Length of time before health checking times out.  In seconds.
 8        // +optional
 9        TimeoutSeconds int32
10        // How often (in seconds) to perform the probe.
11        // +optional
12        PeriodSeconds int32
13        // Minimum consecutive successes for the probe to be considered successful after having failed.
14        // Must be 1 for liveness and startup.
15        // +optional
16        SuccessThreshold int32
17        // Minimum consecutive failures for the probe to be considered failed after having succeeded.
18        // +optional
19        FailureThreshold int32
20        // Optional duration in seconds the pod needs to terminate gracefully upon probe failure.
21        // The grace period is the duration in seconds after the processes running in the pod are sent
22        // a termination signal and the time when the processes are forcibly halted with a kill signal.
23        // Set this value longer than the expected cleanup time for your process.
24        // If this value is nil, the pod's terminationGracePeriodSeconds will be used. Otherwise, this
25        // value overrides the value provided by the pod spec.
26        // Value must be non-negative integer. The value zero indicates stop immediately via
27        // the kill signal (no opportunity to shut down).
28        // This is a beta field and requires enabling ProbeTerminationGracePeriod feature gate.
29        // +optional
30        TerminationGracePeriodSeconds *int64
31    }

 1    apiVersion: v1
 2    kind: Pod
 3    metadata:
 4    labels:
 5        test: liveness
 6    name: liveness-exec
 7    spec:
 8    containers:
 9    - name: liveness
10        image: k8s.gcr.io/busybox
11        args:
12        - /bin/sh
13        - -c
14        - touch /tmp/healthy; sleep 30; rm -f /tmp/healthy; sleep 600
15        resources:
16        limits:
17            cpu: 1000m
18            memory: 2G
19        requests:
20            cpu: 1000m
21            memory: 2G
22        livenessProbe:
23        exec:
24            command:
25            - cat
26            - /tmp/healthy
27        initialDelaySeconds: 5
28        periodSeconds: 5
29
30        startupProbe:
31        exec:
32            command:
33            - cat
34            - /tmp/helloworld   # 这个文件肯定不存在的
35        failureThreshold: 3
36        periodSeconds: 10
37        initialDelaySeconds: 8  # 测试的就是这个参数

1    kubectl -n xxxx-test apply -f exec-liveness.yaml

1    kubectl -n xxxx-test describe pod liveness-exec

1    Events:
2    Type     Reason     Age        From                    Message
3    ----     ------     ----       ----                    -------
4    Normal   Scheduled  <unknown>  default-scheduler       Successfully assigned xxxx-test/liveness-exec to 10.132.135.31
5    Normal   Pulled     9s         kubelet, 10.132.135.31  Container image "xxx/docker/busybox:1.24" already present on machine
6    Normal   Created    9s         kubelet, 10.132.135.31  Created container liveness
7    Normal   Started    9s         kubelet, 10.132.135.31  Started container liveness
8    Warning  Unhealthy  0s         kubelet, 10.132.135.31  Startup probe failed: cat: can't open '/tmp/helloworld': No such file or directory

1    Events:
2    Type     Reason     Age        From                    Message
3    ----     ------     ----       ----                    -------
4    Normal   Scheduled  <unknown>  default-scheduler       Successfully assigned xxxx-test/liveness-exec to 10.132.133.16
5    Normal   Pulling    16s        kubelet, 10.132.133.16  Pulling image "xxx/docker/busybox:1.24"
6    Normal   Pulled     16s        kubelet, 10.132.133.16  Successfully pulled image "xxxx/docker/busybox:1.24"
7    Normal   Created    16s        kubelet, 10.132.133.16  Created container liveness
8    Normal   Started    16s        kubelet, 10.132.133.16  Started container liveness
9    Warning  Unhealthy  0s         kubelet, 10.132.133.16  Startup probe failed: cat: can't open '/tmp/helloworld': No such file or directory