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Kubernetes
Heath Brown edited this page Apr 30, 2024
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| Command | Purpose |
|---|---|
| kubeadm init --pod-network-cidr=192.168.0.0/16 | Initilializes cluster with specific pod network |
| kubadm reset --v=5 | Resets the cluster installation and clean-ups everything BUT iptables, ipvs |
| kubectl get nodes -o wide | Displays nodes |
| kubeadm join $KUBE_MASTER_IP:6443 --token $KUBE_TOKEN --discovery-token-unsafe-skip-ca-verification | Joins new member to cluster and skips CA verificiation check; not recommended |
| kubectl create deployment $deployment-name --image=$image | Creates a new deployment for a pod |
| kubectl get deployments | View deployment |
| kubectl get pods | View pods |
| kubectl get events | View cluster events |
| kubectl config view | View the kubectl configuration |
| kubectl expose deployment $deployment-name -type=LoadBalancer --port=$port | Create services and Expose the Pod to the public network |
| kubectl get services | Displays services |
| Command | Purpose |
|---|---|
| kubectl taint nodes --all | Removes 'taint' for master node to take on additional duties in cluster |
- monolith: large old/legacy application; does all kinds of things
- microservices: small apps, loosely coupled, deployed indepently.
- Deployment: description of service to deploy to k8s api
- Pod: Compute Execution Layer in kubernetes for keeping coupled containers together that typically share resources.
- Container: lowest layer and where the app runs