k8s deployment command code example

Example 1: kubernetes get deployments

# Get pods in default namespace
kubectl get deployments

#Get Pods in my-namespace
kubectl get deployments -n my-namespace

#Get Pods in all namespaces
kubectl get deployments --all-namespaces

Example 2: scale deployment

# scale deployment in the default namespace, named myDeploymentName to have 3 pods
kubectl scale deployment/myDeploymentName --replicas=3

# scale deployment in the myNamespace namespace, named myDeploymentName to have 3 pods
kubectl scale deployment/myDeploymentName --replicas=3 -n myNamespace

Example 3: kubernetes while true sleep

apiVersion: v1
kind: Pod
metadata:
  name: ubuntu
spec:
  containers:
  - name: ubuntu
    image: ubuntu:latest
    # Just spin & wait forever
    command: [ "/bin/bash", "-c", "--" ]
    args: [ "while true; do sleep 30; done;" ]