kubernetes tutorial | ETCD Backup and Restore using "etcdctl" tool | Demo
CERTIFIED KUBERNETES ADMINISTRATOR
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kubernetes tutorial | ETCD Backup and Restore using "etcdctl" tool | Demo
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In this video, you are going to see a DEMO on "ETCD Backup and Restore"
For suggestions/feedback/doubts contact
email: [email protected]
Happy Learning !!!
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USEFUL LINKS
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Operating ETCD Clusters
https://kubernetes.io/docs/tasks/admi...
Backup and Restore ETCD
https://kubernetes.io/docs/tasks/admi...
Install ETCD binaries
https://etcd.io/docs/v3.5/install/
https://github.com/etcd-io/etcd/relea...
Kubectl Command Reference
https://kubernetes.io/docs/reference/...
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#cka #kubernetes #k8s #containers #vsparkz
DEMO STEPS
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Step 1 - Connect to the k8S Cluster and Check ETCD Version
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$ kubectl cluster-info
$ kubectl get nodes
$ kubectl get pods -n kube-system
$ kubectl describe pods pod_name -n kube-system
Step 2 - Download and Install “etcdctl” Tool
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Reference: https://etcd.io/docs/v3.5/install/
$ curl -L https://storage.googleapis.com/etcd/v... -o /tmp/etcd-v3.5.10-linux-amd64.tar.gz
$ tar xzvf /tmp/etcd-v3.5.10-linux-amd64.tar.gz -C /tmp
$ cp /tmp/etcd-v3.5.10-linux-amd64/etcdctl /usr/local/bin/
Step 3 - Take a Backup from ETCD database using “etcdctl” Tool
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Reference: https://kubernetes.io/docs/tasks/admi...
$ ETCDCTL_API=3 etcdctl snapshot save /root/snapshot.db --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
$ ETCDCTL_API=3 etcdctl --write-out=table snapshot status /root/snapshot.db
Step 4 - Delete the deployments/pods in the cluster
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$ kubectl delete deployment deployment_name
Step 5 - Create a New ETCD volume directory and restore the Snapshot
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$ mkdir /var/lib/etcd-bkp
$ ETCDCTL_API=3 etcdctl snapshot restore /root/snapshot.db --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 --data-dir=/var/lib/etcd-bkp
Step 6 - Update the ETCD static pod definition to use the New ETCD Volume
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$ vim /etc/kubernetes/manifest/etcd.yaml
Step 7 - Inspect the cluster after the ETCD backup restoration
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$ kubectl get all
THE END
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