Taking etcd backup

etcd is a static pod running on master which store full information about the k8s cluster. It is very important to keep it safe and take backup all the time before any migration or plan

app-get install etcd-client

above is required to take backup of etcd

using this package it will give us the command etcdctl to take snapshot of etcd

ETCDCTL_API=3 etcdctl --endpoints=https://127.0.0.1:2379 –
cacert=/opt/pki/ca/crt --cert=/opt/pki/client/etcd-client.crt –key=/opt/pki/etcd-client.key
snapshot save /tmp/etcd-snapshot.db

above input details will get from the etcd yaml file

to verify the snapshot use below command

Command to restore the snapshot

ETCDCTL_API=3 etcdctl –data-dir /opt/etcd snapshot restore /tmp/etcd-snapshot.db –endpoint=https://127.0.0.1:2379

ETCDCTL_API=3 etcdctl --cacert=/etc/kubernetes/pki/etcd/ca.crt --cert=/etc/kubernetes/pki/etcd/server.crt --key=/etc/kubernetes/pki/etcd/server.key --endpoints=https://101.53.148.183:2379 snapshot save /tmp/snapshot-pre-boot.db


ETCDCTL_API=3 etcdctl --endpoints=https://101.53.148.183:2379 snapshot restore /tmp/snapshot-pre-boot.db