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CKA Certified Kubernetes Administrator - Coggle Diagram

- - - - recreate
      - rollback
    - - Create kubectl create –f deployment-definition.yml
      - Get kubectl get deployments
      - kubectl apply –f deployment-definition.yml
      - Update kubectl set image deployment/myapp-deployment nginx=nginx:1.9.1
      - kubectl rollout status deployment/myapp-deployment
      - Status kubectl rollout history deployment/myapp-deployment
      - rollout kubectl rollout undo deployment/myapp-deployment
  - - - as an env
      - as a single env
      - volume
  - - - as a Env
      - as a single ennv
      - as a volume
- - - - [Certificate authority](https://github.com/mmumshad/kubernetes-the-hard-way/blob/master/docs/04-certificate-authority.md)
      - [distribute config files](https://github.com/mmumshad/kubernetes-the-hard-way/blob/master/docs/05-kubernetes-configuration-files.md)
      - [data encryption](https://github.com/mmumshad/kubernetes-the-hard-way/blob/master/docs/06-data-encryption-keys.md)
      - [etcd bootstrap](https://github.com/mmumshad/kubernetes-the-hard-way/blob/master/docs/07-bootstrapping-etcd.md)
      - [control plane bootstrap](https://github.com/mmumshad/kubernetes-the-hard-way/blob/master/docs/08-bootstrapping-kubernetes-controllers.md)**
      - [configure kubectl](https://github.com/mmumshad/kubernetes-the-hard-way/blob/master/docs/11-configuring-kubectl.md)
      - [POD networking](https://github.com/mmumshad/kubernetes-the-hard-way/blob/master/docs/12-configure-pod-networking.md)
      - [api-server to kubelet connectivity](https://github.com/mmumshad/kubernetes-the-hard-way/blob/master/docs/13-kube-apiserver-to-kubelet.md)
      - [CORE DNS](https://github.com/mmumshad/kubernetes-the-hard-way/blob/master/docs/14-dns-addon.md)
    - - [ distribute kubeproxy.kubeconfig file](https://github.com/mmumshad/kubernetes-the-hard-way/blob/master/docs/05-kubernetes-configuration-files.md)
      - [worker node bootstrapping](https://github.com/mmumshad/kubernetes-the-hard-way/blob/master/docs/09-bootstrapping-kubernetes-workers.md)
      - [TLS bootstrapping](https://github.com/mmumshad/kubernetes-the-hard-way/blob/master/docs/10-tls-bootstrapping-kubernetes-workers.md)
    - - Istall docker,kubectl, kubelet
- - - - API server
      - ETCD
      - Controller
      - Scheduler
    - - kubelet
      - kube proxy
- - - - kubectl create role developer --resource=pods --verb=create,list,get,update,delete --namespace=development
    - - kubectl create rolebinding developer-role-binding --role=developer --user=ash --namespace=development
    - - kubectl create clusterrole admin --resource=daemonsets,persistentvolumes --verb=create,list,get,update,delete --
    - - kubectl create clusterrolebinding admin-role-binding --role=admin --user=ash
- - - - apt-mark unhold kubeadm && apt-get update && apt-get install -y kubeadm=1.17.0-00 && apt-mark hold kubeadm
      - apt-mark unhold kubelet kubectl &&
      - apt-get update && apt-get install -y kubelet=1.17.0-00 kubectl=1.17.0-00 &&
      - apt-mark hold kubelet kubectl
      - sudo systemctl restart kubelet
    - - apt-mark unhold kubeadm && apt-get update && apt-get install -y kubeadm=1.17.0-00 && apt-mark hold kubeadm
      - apt-mark unhold kubelet kubectl && apt-get update && apt-get install -y kubelet=1.17.0-00 kubectl=1.17.0-00 && apt-mark hold kubelet kubectl
      - sudo systemctl restart kubelet
- - - - 1) check for service is properly accessible for PODS/deployments exposed
      - 2) Check for resource quota in case of OEM killed
      - 3) Check for volumre mounts done propelry
        
        i) in case hospath check directory exists on worker nodes
        
        ii) Check for volume modes
        
        ii) subpath is propely configured
  - - - 1) Check for all pods are running in kube-system namepace
      - 2) Check for controller POD (static POD) in case of replication not happening
      - 3) Check for scheduler POD (static POD) inn case scheduling is not happening