代码语言：javascript复制
$ cat <<EOF | kubectl apply -f -
apiVersion: v1
kind: Pod
metadata:
labels:
test: liveness
name: liveness-exec
spec:
containers:
- name: liveness
image: quay.io/prometheus/busybox:latest
args:
- /bin/sh
- -c
- touch /tmp/healthy; sleep 10; rm -rf /tmp/healthy; sleep 600
livenessProbe:
exec:
command:
- cat
- /tmp/healthy
initialDelaySeconds: 10
periodSeconds: 5
EOF
$ kgp
NAME READY STATUS RESTARTS AGE
liveness-exec 1/1 Running 1 58s
$ k exec liveness-exec -- ls /tmp
healthy
$ k exec liveness-exec -- rm -rf /tmp/healthy
$ k exec liveness-exec -- ls /tmp
$ kdp
Name: liveness-exec
Namespace: ch10
Priority: 0
Node: kind-control-plane/172.18.0.2
Start Time: Thu, 16 Dec 2021 12:22:52 0800
Labels: test=liveness
Annotations: <none>
Status: Running
IP: 10.244.0.51
IPs:
IP: 10.244.0.51
Containers:
liveness:
Container ID: containerd://d275c56d54591f8252c28a306c303f02272a4dd65ada00d3eb79a794ba540bcc
Image: quay.io/prometheus/busybox:latest
Image ID: quay.io/prometheus/busybox@sha256:2548dd93c438f7cf8b68dc2ff140189d9bcdae7130d3941524becc31573ec9e3
Port: <none>
Host Port: <none>
Args:
/bin/sh
-c
touch /tmp/healthy; sleep 10; rm -rf /tmp/healthy; sleep 600
State: Running
Started: Thu, 16 Dec 2021 12:23:47 0800
Last State: Terminated
Reason: Error
Exit Code: 137
Started: Thu, 16 Dec 2021 12:22:52 0800
Finished: Thu, 16 Dec 2021 12:23:47 0800
Ready: True
Restart Count: 1
Liveness: exec [cat /tmp/healthy] delay=10s timeout=1s period=5s #success=1 #failure=3
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from default-token-vv9gz (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
default-token-vv9gz:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-vv9gz
Optional: false
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 62s default-scheduler Successfully assigned ch10/liveness-exec to kind-control-plane
Normal Pulled 62s kubelet Successfully pulled image "quay.io/prometheus/busybox:latest" in 112.409367ms
Warning Unhealthy 37s (x3 over 47s) kubelet Liveness probe failed: cat: can't open '/tmp/healthy': No such file or directory
Normal Killing 37s kubelet Container liveness failed liveness probe, will be restarted
Normal Pulling 7s (x2 over 62s) kubelet Pulling image "quay.io/prometheus/busybox:latest"
Normal Created 7s (x2 over 62s) kubelet Created container liveness
Normal Started 7s (x2 over 62s) kubelet Started container liveness
Normal Pulled 7s kubelet Successfully pulled image "quay.io/prometheus/busybox:latest" in 126.868686ms参考
- cka/ckad应试指南：从docker到kubernetes完全攻略 ch-10
LEo at 00:12
