How to spin up a ETCD docker container and restore a backup obtained from a kubernetes ETCD Cluster node?

Anjula Paulus

12/16/22, 8:51 PM

I am trying to spin up a ETCD node in docker and restore a backup obtained from the Kubernetes Cluster node.

ETCDCTL_API=3 etcdctl --endpoints=https://127.0.0.1:2379  --user=root:'root' snapshot save snapshot.db

I have obtained the snapshot and have it downloaded locally. How could i restore onto a already spinned up etcd node?

The following command was used to spin up the container.I have mounted a data volume.

docker run -d --restart always \
  -p 2379:2379 \
  -p 2380:2380 \
  --volume=etcd-volume:/etcd-data \
  --name etcd gcr.io/etcd-development/etcd:latest \
  /usr/local/bin/etcd \
  --data-dir=/etcd-data --name etcd \
  --initial-advertise-peer-urls http://127.0.0.1:2380 --listen-peer-urls 
  http://0.0.0.0:2380 \
  --advertise-client-urls http://127.0.0.1:2379 --listen-client-urls http://0.0.0.0:2379 \
  --initial-cluster etcd=http://127.0.0.1:2380

Then I tried to restore it using the following.

ETCDCTL_API=3 etcdctl snapshot restore snapshot.db \
  --name m1 \
  --initial-cluster m1=http://127.0.0.1:2379 \
  --initial-cluster-token etcd-cluster \
  --initial-advertise-peer-urls http://127.0.0.1:2379 \
  --data-dir /var/lib/docker/volumes/etcd-volume

Both the ETCD cluster and docker are on two different VMs. I tried to execute the above command from the local machine as etcdctl tool has to be installed in docker to execute that command. The restoration has not happened. I just need the keys to be copied onto the new. Any suggestion on how I could do it?

178

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ubuntu

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kubernetes

etcd

SYN

12/16/22, 9:36 PM

Is there an error? What does the snapshot restore tells you?

Anjula Paulus

12/31/22, 6:48 AM

I have done a small library implementation to copy and insert ETCD keys from one node to another in golang. https://github.com/anjulapaulus/etcd-replicator

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: How to spin up a ETCD docker container and restore a backup obtained from a kubernetes ETCD Cluster node?

TH: จะหมุนคอนเทนเนอร์ ETCD docker และกู้คืนข้อมูลสำรองที่ได้รับจากโหนดคลัสเตอร์ ETCD ของ kubernetes ได้อย่างไร

RO: Cum să rotiți un container docker ETCD și să restabiliți o copie de rezervă obținută de la un nod Kubernetes ETCD Cluster?

RU: Как развернуть док-контейнер ETCD и восстановить резервную копию, полученную с узла кластера ETCD kubernetes?

VI: Làm cách nào để khởi động bộ chứa docker ETCD và khôi phục bản sao lưu thu được từ nút Cụm ETCD kubernetes?

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