etcd 備份還原
1. 查看 etcdctl 是否已經(jīng)安裝
# quick check if etcdctl is available or not
ETCDCTL_API=3 etcdctl --help | head
2. 安裝 etcdctl
# 獲取 etcd 版本信息
kubectl exec -it etcd-master -n kube-system -- /bin/sh -c 'ETCDCTL_API=3 /usr/local/bin/etcd --version' | head
# 下載
export RELEASE="3.4.3"
https://github.com/etcd-io/etcd/releases/download/v${RELEASE}/etcd-v${RELEASE}-linux-amd64.tar.gz
# 解壓
tar -zxvf etcd-v${RELEASE}-linux-amd64.tar.gz
# 將 etcdctl 拷貝到 、usr/local/bin 目錄
cd etcd-v${RELEASE}-linux-amd64
cp etcdctl /usr/local/bin
3. 備份
# create a secret
kubectl create secret generic test-secret \
--from-literal=username='svcaccount' \
--from-literal=password='password'
# Verify we are connecting to the right cluster ... define your endpoints and keys
ENDPOINT=https://127.0.0.1:2379
ETCDCTL_API=3 etcdctl --endpoints=$ENDPOINT \
--cacert=/etc/kubernetes/pki/etcd/ca.crt \
--cert=/etc/kubernetes/pki/etcd/server.crt \
--key=/etc/kubernetes/pki/etcd/server.key \
member list
# Take the backup
ETCDCTL_API=3 etcdctl --endpoints=$ENDPOINT \
--cacert=/etc/kubernetes/pki/etcd/ca.crt \
--cert=/etc/kubernetes/pki/etcd/server.crt \
--key=/etc/kubernetes/pki/etcd/server.key \
snapshot save /var/lib/dat-backup.db
# Read the metadata from the backup/snapshot to print out the snapshot status
ETCDCTL_API=3 etcdctl --write-out=table snapshot status /var/lib/dat-backup.db
4. 還原
# Delete the secrets
kubectl delete secret test-secret
# Restore the backup
ETCDCTL_API=3 etcdctl snapshot restore /var/lib/dat-backup.db
# Confirm our data is in the restore directory, you should see default.etcd
ls -l
# Move the old etcd data to a safe location
mv /var/lib/etcd /var/lib/etcd.OLD
# Restart the static pod for etcd
# if you use kubectl delete it will NOT restart the static pod as it is managed by the kubelet not a controller
docker ps | grep k8s_etcd
CONTAINER_ID=$(docker ps | grep k8s_etcd | awk '{ print $1 }')
echo $CONTAINER_ID
# Stop the container from our etcd pod and move restored data into place
docker stop $CONTAINER_ID
rm -rf /var/lib/etcd/member
mv ./default.etcd/member /var/lib/etcd
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文章來(lái)源：http://www.zghlxwxcb.cn/news/detail-692285.html
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