seulseul

12.Lightning Labs 01. Upgrade the current version of kubernetes from 1.19 to 1.20.0 exactly using the kubeadm utility. Make sure that the upgrade is carried out one node at a time starting with the master node. To minimize downtime, the deployment gold-nginx should be rescheduled on an alternate node before upgrading each node. Upgrade controlplane node first and drain node node01 before upgradi..

alias k=kubectl complete -F __start_kubectl k alias k=kubectl complete -F __start_kubectl k 01. Create a new service account with the name pvviewer. Grant this Service account access to list all PersistentVolumes in the cluster by creating an appropriate cluster role called pvviewer-role and ClusterRoleBinding called pvviewer-role-binding. Next, create a pod called pvviewer with the image: redis..

01. Take a backup of the etcd cluster and save it to /opt/etcd-backup.db. ETCDCTL_API=3 etcdctl --endpoints=https://127.0.0.1:2379 \ --cacert=/etc/kubernetes/pki/etcd/ca.crt \ --cert=/etc/kubernetes/pki/etcd/server.crt\ --key=/etc/kubernetes/pki/etcd/server.key \ snapshot save /opt/etcd-backup.db ETCDCTL_API=3 etcdctl --endpoints=https://127.0.0.1:2379 \ --cacert= --cert= --key= \ snapshot save ..

MOCK EXAMS, MOCK EXAM – 1 01. Deploy a pod named nginx-pod using the nginx:alpine image. Once done, click on the Next Question button in the top right corner of this panel. You may navigate back and forth freely between all questions. Once done with all questions, click on End Exam. Your work will be validated at the end and score shown. Good Luck! Name: nginx-pod Image: nginx:alpine k run nginx..

LABS – CERTIFIED KUBERNETES ADMINISTRATOR WITH PRACTICE TESTS > TROUBLESHOOTING Troubleshooting 01. Application Failure 02. Control Plane Failure 03. Worker Node Failure 04. Troubleshoot Network **Troubleshooting Test 1:** A simple 2 tier application is deployed in the triton namespace. It must display a green web page on success. Click on the app tab at the top of your terminal to view your app..

LABS – CERTIFIED KUBERNETES ADMINISTRATOR WITH PRACTICE TESTS > TROUBLESHOOTING Troubleshooting 01. Application Failure 02. Control Plane Failure 03. Worker Node Failure 04. Troubleshoot Network 01. Fix the broken cluster Fix node01 # hint Step1. Check the status of services on the nodes. Step2. Check the service logs using journalctl -u kubelet Step3. If it's stopped then start the stopped serv..

LABS – CERTIFIED KUBERNETES ADMINISTRATOR WITH PRACTICE TESTS > TROUBLESHOOTING Troubleshooting 01. Application Failure 02. Control Plane Failure 03. Worker Node Failure 04. Troubleshoot Network 01. The cluster is broken again. We tried deploying an application but it's not working. Troubleshoot and fix the issue. Start looking at the deployments. 클러스터가 다시 손상되었습니다. 애플리케이션 배포를 시도했지만 작동하지 않습니다. 문제..

09. Install - Cluster Installation using Kubeadm 01. Install the kubeadm package on the controlplane and node01. Use the exact version of 1.21.0-00 kubeadm installed on controlplane ? Kubeadm installed on worker node01 https://kubernetes.io/ko/docs/setup/production-environment/tools/kubeadm/install-kubeadm/ kubeadm 설치하기 이 페이지에서는 kubeadm 툴박스 설치 방법을 보여준다. 이 설치 프로세스를 수행한 후 kubeadm으로 클러스터를 만드는 방법에 대..

07. Networking 01. Explore Environment 02. CNI weave 03. Deploy Network Solution 04. Networking Weave 05. Service Networking 06. CoreDNS in Kubernetes 07. CKA – Ingress Networking – 1 Ingress Networking (1) 08. CKA – Ingress Networking – 2 Ingress Networking (2) 01. We have deployed two applications. Explore the setup. Note: They are in a different namespace. 02. Let us now deploy an Ingress Con..

07. Networking 01. Explore Environment 02. CNI weave 03. Deploy Network Solution 04. Networking Weave 05. Service Networking 06. CoreDNS in Kubernetes 07. CKA – Ingress Networking – 1 Ingress Networking (1) 08. CKA – Ingress Networking – 2 Ingress Networking (2) 01. We have deployed Ingress Controller, resources and applications. Explore the setuIngress Controller, 리소스 및 애플리케이션을 배포했습니다. 설정을 탐색합니..