monitoring-logging.md

monitoring and logging

• solutions
  • prometheus
  • metrics-server
    • to get memory consumtion per node

      kubectl top node
      

• logging
  • to see logs from pod live with one container

    kubectl logs -f <pod-name>
    

  • to see logs from pod live with more than one container

    kubectl logs -f <pod-name> <container-name>
    

  • shared volume for multiple containers in a pod (elastic-search)

    apiVersion: v1
    kind: Pod
    metadata:
      name: app
      namespace: elastic-stack
      labels:
        name: app
    spec:
      containers:
      - name: app
        image: kodekloud/event-simulator
        volumeMounts:
        - mountPath: /log
          name: log-volume
    
      - name: sidecar
        image: kodekloud/filebeat-configured
        volumeMounts:
        - mountPath: /var/log/event-simulator/
          name: log-volume
    
      volumes:
      - name: log-volume
        hostPath:
          # directory location on host
          path: /var/log/webapp
          # this field is optional
          type: DirectoryOrCreate