How to get logs of deployment from Kubernetes?

Question

I am creating an InfluxDB deployment in a Kubernetes cluster (v1.15.2), this is my yaml file:

apiVersion: extensions/v1beta1 kind: Deployment metadata:   name: monitoring-influxdb   namespace: kube-system spec:   replicas: 1   template:     metadata:       labels:         task: monitoring         k8s-app: influxdb     spec:       containers:       - name: influxdb         image: registry.cn-hangzhou.aliyuncs.com/google_containers/heapster-influxdb-amd64:v1.5.2         volumeMounts:         - mountPath: /data           name: influxdb-storage       volumes:       - name: influxdb-storage         emptyDir: {} --- apiVersion: v1 kind: Service metadata:   labels:     task: monitoring     # For use as a Cluster add-on (https://github.com/kubernetes/kubernetes/tree/master/cluster/addons)     # If you are NOT using this as an addon, you should comment out this line.     kubernetes.io/cluster-service: 'true'     kubernetes.io/name: monitoring-influxdb   name: monitoring-influxdb   namespace: kube-system spec:   ports:   - port: 8086     targetPort: 8086   selector:     k8s-app: influxdb 

And this is the pod status:

$ kubectl get deployment -n kube-system NAME                   READY   UP-TO-DATE   AVAILABLE   AGE coredns                1/1     1            1           163d kubernetes-dashboard   1/1     1            1           164d monitoring-grafana     0/1     0            0           12m monitoring-influxdb    0/1     0            0           11m 

Now, I've been waiting 30 minutes and there is still no pod available, how do I check the deployment log from command line? I could not access the Kubernetes dashboard now. I am searching a command to get the pod log, but now there is no pod available. I already tried to add label in node:

kubectl label nodes azshara-k8s03 k8s-app=influxdb 

This is my deployment describe content:

$ kubectl describe deployments monitoring-influxdb -n kube-system Name:                   monitoring-influxdb Namespace:              kube-system CreationTimestamp:      Wed, 04 Mar 2020 11:15:52 +0800 Labels:                 k8s-app=influxdb                         task=monitoring Annotations:            kubectl.kubernetes.io/last-applied-configuration:                           {"apiVersion":"extensions/v1beta1","kind":"Deployment","metadata":{"annotations":{},"name":"monitoring-influxdb","namespace":"kube-system"... Selector:               k8s-app=influxdb,task=monitoring Replicas:               1 desired | 0 updated | 0 total | 0 available | 0 unavailable StrategyType:           RollingUpdate MinReadySeconds:        0 RollingUpdateStrategy:  1 max unavailable, 1 max surge Pod Template:   Labels:  k8s-app=influxdb            task=monitoring   Containers:    influxdb:     Image:        registry.cn-hangzhou.aliyuncs.com/google_containers/heapster-influxdb-amd64:v1.5.2     Port:         <none>     Host Port:    <none>     Environment:  <none>     Mounts:       /data from influxdb-storage (rw)   Volumes:    influxdb-storage:     Type:        EmptyDir (a temporary directory that shares a pod's lifetime)     Medium:     SizeLimit:   <unset> OldReplicaSets:  <none> NewReplicaSet:   <none> Events:          <none> 

This is another way to get logs:

$ kubectl -n kube-system logs -f deployment/monitoring-influxdb error: timed out waiting for the condition 

There is no output for this command:

kubectl logs --selector k8s-app=influxdb 

There is all my pod in kube-system namespace:

~/Library/Mobile Documents/com~apple~CloudDocs/Document/k8s/work/heapster/heapster-deployment ⌚ 11:57:40 $ kubectl get pods -n kube-system NAME                                  READY   STATUS    RESTARTS   AGE coredns-569fd64d84-5q5pj              1/1     Running   0          46h kubernetes-dashboard-6466b68b-z6z78   1/1     Running   0          11h traefik-ingress-controller-hx4xd      1/1     Running   0          11h 

Answer 1

kubectl logs deployment/<name-of-deployment> # logs of deployment kubectl logs -f deployment/<name-of-deployment> # follow logs