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Learn Kubernetes: A Deep Dive

Accessing Deployments

Explore how to access and inspect Kubernetes Deployments and ReplicaSets using kubectl commands. Understand how rollouts and updates trigger changes in ReplicaSets, and learn to verify and describe these components for effective cluster management.

We'll cover the following...

Let’s have a look at the deploy.yml file from the previous lesson. We’ll execute all these commands from the below terminal. Click the "Run" button to create a cluster.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-deploy
spec:
  replicas: 10
  selector:
    matchLabels:
      app: hello-world
  revisionHistoryLimit: 5
  progressDeadlineSeconds: 300
  minReadySeconds: 10
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
      maxSurge: 1
  template:
    metadata:
      labels:
        app: hello-world
    spec:
      containers:
      - name: hello-pod
        image: nigelpoulton/k8sbook:1.0
        ports:
        - containerPort: 8080
        resources:
          limits:
            memory: 128Mi
            cpu: 0.1
Playground

Inspecting Deployments

We can use the normal kubectl get and kubectl describe ...