Pods¶

Get¶

kubectl get pods --all-namespaces
kubectl get pods --all-namespaces -o wide
kubectl get pods --namespace=podexample -o wide

kubectl get pods -o custom-columns=POD:metadata.name,NODE:spec.nodeName --sort-by spec.nodeName -n kube-system

Example¶

apiVersion: v1
kind: Pod
metadata:
  name: examplepod
  namespace: pod-example
spec:
  schedulerName: default-scheduler # To change scheduler - my-scheduler
  volumes:
  - name: html
    emptyDir: {}
  containers:
  - name: webcontainer
    image: nginx
    volumeMounts:
    - name: html
      mountPath: /usr/share/nginx/html
  - name: filecontainer
    image: debian
    volumeMounts:
    - name: html
      mountPath: /html
    command: ["/bin/sh", "-c"]
    args:
      - while true; do
         date >> /html/index.html;
         sleep 1;
        done

Resources Requests and Limits¶

apiVersion: v1
kind: Pod
metadata:
  name: resource-pod2
spec:
  nodeSelector:
    kubernetes.io/hostname: "chadcrowell3c.mylabserver.com"
  containers:
  - image: busybox
    command: ["dd", "if=/dev/zero", "of=/dev/null"]
    name: pod2
    resources:
      requests:
        cpu: 1000m
        memory: 20Mi

apiVersion: v1
kind: Pod
metadata:
  name: limited-pod
spec:
  containers:
  - image: busybox
    command: ["dd", "if=/dev/zero", "of=/dev/null"]
    name: main
    resources:
      limits:
        cpu: 1
        memory: 20Mi

Get Containers Name inside a pod¶

kubectl get pods examplepod -n podexample -o jsonpath='{.spec.containers[*].name}*'

Use port forwarding to access a pod directly¶

kubectl port-forward $pod_name 8081:80