Kubernetes deployments

Kubernetes deployments provides declarative updates for Pods and ReplicaSets.

• https://kubernetes.io/docs/concepts/workloads/controllers/deployment/

• Strategies: Recreate or RollingUpdate
• replicas:
• kind: Deployment

Commands

• kubectl rollout: status, restart, resume, pause, history, undo
• kubectl create deployment hello-minikube --image=k8s.gcr.io/echoserver:1.10

kubectl expose deployment hello-minikube --type=NodePort --port=8080

• kubectl describe deployment mysql
• kubectl get deployments
• kubectl get deployments -A
• kubectl scale deployment

Activities

• CKA v1.24: Understand the primitives used to create robust, self-healing, application deployments
• CKA v1.23: Understand deployments and how to perform rolling update and rollbacks
• CKA v1.18: Understand Kubernetes deployments and how to perform updates and rollbacks
• CKA v1.15: Understand Deployments and how to perform rolling updates
• Read https://blog.container-solutions.com/kubernetes-deployment-strategies
  • Recreate, rolling-update, a/b testing .../...
• Read https://kubernetes.io/docs/concepts/workloads/controllers/replicaset/#deployment-recommended

Related terms

• Canary Deployment
• kubectl scale
• kubectl rolling-update (deprecated)
• kubectl rollout pause
• Kubernetes services
• Kubernetes Rolling updates
• kind: ReplicaSet
• Kubernetes pod affinity and anti affinity

See also

• Kubernetes deployments, strategies: kind: Deployment, Strategies: Recreate or RollingUpdate, kubectl [ create | describe | get | scale | rollout | deployment/ ], Kubernetes Canary Deployments, deployment.kubernetes.io
• Kubernetes Workloads: Deployment, ReplicaSet, StatefulSet, DaemonSets, Job, CronJob, .apps/