80 lines
No EOL
2.9 KiB
Markdown
80 lines
No EOL
2.9 KiB
Markdown
# 单机备份
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```
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etcdctl --endpoints="https://10.25.72.62:2379" \
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--cert=/etc/etcd/ssl/etcd.pem \
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--key=/etc/etcd/ssl/etcd-key.pem \
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--cacert=/etc/kubernetes/ssl/ca.pem \
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snapshot save snapshot.db
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```
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# 单机恢复
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## etcd停止运行
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```
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systemctl stop etcd
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```
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## 使用etcd的v3接口
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```
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export ETCDCTL_API=3
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```
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## 恢复
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```
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etcdctl snapshot restore snapshot.db \
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--name=SZD-L0105331 \
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--endpoints=https://10.25.72.62:2379 \
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--cacert=/etc/kubernetes/ssl/ca.pem \
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--cert=/etc/etcd/ssl/etcd.pem \
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--key=/etc/etcd/ssl/etcd-key.pem \
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--initial-cluster=SZD-L0105331=https://10.25.72.62:2380 \
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--initial-advertise-peer-urls=https://10.25.72.62:2380 \
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--initial-cluster-token=etcd-cluster-0 \
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--data-dir=/var/lib/etcd4 # 注意--data-dir参数,以下步骤需要使用
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```
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#### 修改etcd启动参数--data-dir指向上一步的数据回复目录，一般在/etc/etcd/etcd文件中
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```
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cat /etc/etcd/etcd
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```
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```
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ETCD_OPTIONS="--name=SZD-L0105331 \
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--client-cert-auth=true \
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--cert-file=/etc/etcd/ssl/etcd.pem \
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--key-file=/etc/etcd/ssl/etcd-key.pem \
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--peer-cert-file=/etc/etcd/ssl/etcd.pem \
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--peer-key-file=/etc/etcd/ssl/etcd-key.pem \
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--trusted-ca-file=/etc/kubernetes/ssl/ca.pem \
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--peer-trusted-ca-file=/etc/kubernetes/ssl/ca.pem \
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--initial-advertise-peer-urls=https://10.25.72.62:2380 \
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--listen-peer-urls=https://10.25.72.62:2380 \
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--listen-client-urls=https://10.25.72.62:2379,https://127.0.0.1:2379 \
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--advertise-client-urls=https://10.25.72.62:2379 \
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--initial-cluster-token=etcd-cluster-0 \
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--initial-cluster=SZD-L0105331=https://10.25.72.62:2380 \
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--initial-cluster-state=new \
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--data-dir=/var/lib/etcd"
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```
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## etcd启动
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```
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systemctl start etcd
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```
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# 集群备份
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```
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ETCDCTL_API=3 etcdctl --endpoints="https://10.25.84.251:2379,https://10.25.73.25:2379,https://10.25.73.150:2379" --cert=/root/etcd-cluster/etcd.pem --key=/root/etcd-cluster/etcd-key.pem --cacert=/root/etcd-cluster/ca.pem snapshot save mysnapshot.db
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```
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# 集群恢复
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## 停止集群
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***说明：etcd使用RAFT策略完成集群leader选举，且集群数量是奇数，因此，停掉leader不会影响使用，内部会重新选择一个leader***
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```
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systemctl stop etcd
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```
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## 删除原数据
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***确认已备份***
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```
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rm -rf /var/lib/etcd
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```
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## 恢复
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```
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ETCDCTL_API=3 etcdctl --name=SZD-L0097856 --endpoints="https://10.25.84.251:2379" --cert=/root/etcd-cluster/etcd.pem --key=/root/etcd-cluster/etcd-key.pem --cacert=/root/etcd-cluster/ca.pem --initial-cluster-token=etcd-cluster-0 --initial-advertise-peer-urls=https://10.25.84.251:2380 --initial-cluster=SZD-L0101798=https://10.25.73.25:2380,SZD-L0103739=https://10.25.73.150:2380,SZD-L0097856=https://10.25.84.251:2380 --data-dir=/var/lib/etcd snapshot restore mysnapshot.db
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```
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## 启动etcd
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```
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systemctl start etcd
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``` |