13. Kubernetes Debugging смотреть онлайн

*** Example:1 - With error ****
## vi my-nginx-err.yaml

apiVersion: v1
kind: Pod
metadata:
name: my-nginx-err-pod
spec:
containers:
- name: my-nginx-err-container
image: ngnx

## kubectl create -f my-nginx-err.yaml

## kubectl get pods

## kubectl describe pod my-nginx-err-pod

## kubectl logs my-nginx-err-pod

## kubectl edit pods my-nginx-err-pod
## kubectl get pods

*** Example:2 with errors ***
## vi my-nginx-export.yaml

apiVersion: v1
kind: Pod
metadata:
name: my-nginx-export-pod
spec:
containers:
- name: my-nginx-export-container
image: nginx:119

## kubectl create -f my-nginx-export.yaml

## kubectl get pod my-nginx-export-pod

## kubectl edit pods my-nginx-export-pod

****** adding liveness probe.
spec:
containers:
- image: nginx:1.19
imagePullPolicy: IfNotPresent
name: my-nginx-export-container
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /var/run/secrets/kubernetes.io/serviceaccount
name: default-token-vfbjq
readOnly: true
livenessProbe:
httpGet:
path: /
port: 80
*********************************

## kubectl get pod my-nginx-export-pod -o yaml # my-nginx-export2.yaml

## kubectl delete pod my-nginx-export-pod --now

***** edit the pod specification and re-create the pod.
correct the nginx tag to 1.19 and also add liveness probe.
## vi my-nginx-export2.yaml

spec:
containers:
- image: nginx:1.19
imagePullPolicy: IfNotPresent
name: my-nginx-export-container
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /var/run/secrets/kubernetes.io/serviceaccount
name: default-token-vfbjq
readOnly: true
livenessProbe:
httpGet:
path: /
port: 80
********************

## kubectl apply -f my-nginx-export2.yaml
## kubectl get pods