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Lab 4 Pods : Pod Logging Sidecar

Log-Shipping Sidecar :-

Create ` pod-logging-sidecar.yaml ` file with following Contents:-

---
apiVersion: v1
kind: Pod
metadata:
  name: counter-log-sidecar
spec:
  containers:
  - name: count
    image: busybox
    args:
    - /bin/sh
    - -c
    - >
        i=0;
        while true;
        do
          echo "$i: $(date)" >> /var/log/1.log;
          echo "$(date) INFO $i" >> /var/log/2.log;
          i=$((i+1));
          sleep 1;
        done
    volumeMounts:
    - name: varlog
      mountPath: /var/log
  - name: counter-log-1
    image: busybox
    args: [/bin/sh, -c, 'tail -n+1 -f /var/log/1.log']
    volumeMounts:
    - name: varlog
      mountPath: /var/log
  - name: counter-log-2
    image: busybox
    args: [/bin/sh, -c, 'tail -n+1 -f /var/log/2.log']
    volumeMounts:
    - name: varlog
      mountPath: /var/log
  volumes:
  - name: varlog
    emptyDir: {}

kubectl Create ' Or kubectl Apply ‘

kubectl create -f pod-logging-sidecar.yaml 
pod/counter-log-sidecar created

List All Running Pods

sangam:pods sangam$ kubectl get po
NAME                                 READY   STATUS                       RESTARTS   AGE
counter                              1/1     Running                      0          2d2h
counter-log-sidecar                  3/3     Running                      0          4m21s

kubectl logs

sangam:pods sangam$ kubectl exec counter-log-sidecar -c count -it bin/sh
/ # ls
bin   dev   etc   home  proc  root  sys   tmp   usr   var
/ # cd var/log
/var/log # ls
1.log  2.log
/var/log #