himadriganguly / minikube-internal-etcd-backup

Backup internal ETCD cluster in Kubernetes

Minikube Internal ETCD Backup

It will automatically create a backup of internal etcd cluster in minikube under /data/backup folder. This is done using CronJob in Kubernetes. The same procedure applies for any K8s cluster with internal etcd cluster.

Requirement

1. Running instance of Minikube cluster.

Modify YAML File

1. Check the image of etcd used. To do so login into Minikube instance and view the file /etc/kubernetes/manifests/etcd.yaml

minikube ssh

sudo cat /etc/kubernetes/manifests/etcd.yaml

under spec.containers.image you will get the image

image: k8s.gcr.io/etcd:3.4.3-0

then change the YAML accordingly on line 15.

2. Check for --trusted-ca-file, --cert-file and --key-file from the above cat output and replace on line 23

replace the value of --trusted-ca-file in

--cacert=[CA CERT FILE PATH]

replace the value of --cert-file in

--cert=[SERVER CERT FILER PATH]

replace the value of --key-file in

--key=[SERVER KEY FILE PATH]

3. After modification of the YAML file create the CronJob using the command

kubectl create -f k8s-internal-etcd-cluster-backup.yaml

You can check the view the created CronJob using the command

kubectl get cronjob -n kube-system