kubernetes tutorial | ETCD Backup and Restore using "etcdctl" tool | Demo

Published: 30 November 2023
on channel: VSPARKZ

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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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