k8s etcd备份与恢复

admin • • 研发管理
  1. 停止api-server（k8s的所有master节点）
    # 所有master节点执行：
# 停api-server

mkdir -p tpm_api_conf
mv  /etc/kubernetes/manifests/kube-apiserver.yaml /root/tpm_api_conf/
  2. etcd备份（集群中某一节点）
    # etcd备份

ETCDCTL_API=3;/usr/local/bin/etcdctl --endpoints='https://192.168.1.30:2379' --cacert="/etc/ssl/etcd/ssl/ca.pem" --cert="/etc/ssl/etcd/ssl/admin-ks-master01.pem" --key="/etc/ssl/etcd/ssl/admin-ks-master01-key.pem" snapshot save  snapshot_20230928.db
  3. 查看备份数据状态
    # 查看备份数据状态

ETCDCTL_API=3;/usr/local/bin/etcdctl --write-out=table snapshot status snapshot_20230928.db
  4. 停止etcd服务并备份数据目录（etcd所有节点）
    # 停etcd:

systemctl stop etcd
mv /var/lib/etcd/ /root/etcd_bak
  5. 各个etcd节点恢复数据
    # 节点30:

ETCDCTL_API=3;/usr/local/bin/etcdctl snapshot restore /root/snapshot_20230928.db 
 --name etcd-ks-master01  
 --cert="/etc/ssl/etcd/ssl/admin-ks-master01.pem" 
 --key="/etc/ssl/etcd/ssl/admin-ks-master01-key.pem"  
 --cacert="/etc/ssl/etcd/ssl/ca.pem"   
 --endpoints="https://127.0.0.1:2379" 
 --initial-advertise-peer-urls="https://192.168.1.30:2380"  
 --initial-cluster="etcd-ks-master01=https://192.168.1.30:2380,etcd-ks-master02=https://192.168.1.31:2380,etcd-ks-master03=https://192.168.1.32:2380" 
 --data-dir=/var/lib/etcd
 
# 节点31:

ETCDCTL_API=3;/usr/local/bin/etcdctl snapshot restore /root/snapshot_20230928.db 
 --name etcd-ks-master02  
 --cert="/etc/ssl/etcd/ssl/admin-ks-master02.pem" 
 --key="/etc/ssl/etcd/ssl/admin-ks-master02-key.pem"  
 --cacert="/etc/ssl/etcd/ssl/ca.pem"   
 --endpoints="https://127.0.0.1:2379" 
 --initial-advertise-peer-urls="https://192.168.1.31:2380"  
 --initial-cluster="etcd-ks-master01=https://192.168.1.30:2380,etcd-ks-master02=https://192.168.1.31:2380,etcd-ks-master03=https://192.168.1.32:2380" 
 --data-dir=/var/lib/etcd
 
# 节点32:

ETCDCTL_API=3;/usr/local/bin/etcdctl snapshot restore /root/snapshot_20230928.db 
 --name etcd-ks-master03  
 --cert="/etc/ssl/etcd/ssl/admin-ks-master03.pem" 
 --key="/etc/ssl/etcd/ssl/admin-ks-master03-key.pem"  
 --cacert="/etc/ssl/etcd/ssl/ca.pem"   
 --endpoints="https://127.0.0.1:2379" 
 --initial-advertise-peer-urls="https://192.168.1.32:2380"  
 --initial-cluster="etcd-ks-master01=https://192.168.1.30:2380,etcd-ks-master02=https://192.168.1.31:2380,etcd-ks-master03=https://192.168.1.32:2380" 
 --data-dir=/var/lib/etcd
  6. etcd节点修改数据目录权限并启动etcd
    # 所有节点执行：
# 修改属组
chown -R etcd:root /var/lib/etcd/

# 启动etcd
systemctl start etcd
  7. 启动api-server（所有k8s master节点）
    # etcd启动完成后，恢复api配置
mv  /root/tpm_api_conf/kube-apiserver.yaml   /etc/kubernetes/manifests/kube-apiserver.yaml
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