etcd入門指南
微信公衆號：運維開發故事，做者：華仔linux
前言
最近買了一份etcd課程，但願經過這樣的方式來記記錄一下學習過程和結果。環境說明以下：git
| 序號 | IP | 主機名 | 說明 |
|---|---|---|---|
| 1 | 10.211.55.50 | etcd1 | etcd version爲3.4.16，虛擬機，系統爲CentOS 7.7，使用自簽證書 |
| 2 | 10.211.55.51 | etcd2 | |
| 3 | 10.211.55.52 | etcd3 |
1、集羣搭建
我這裏將etcd部署在虛擬機上，採起靜態配置，即etcd各節點在配置中指定。github
- 全部節點下載etcd並解壓、移動至/usr/local/bin/，並給予對應權限
# 下載地址：https://github.com/etcd-io/etcd/releases
wget https://github.com/coreos/etcd/releases/download/v3.4.16/etcd-v3.4.16-linux-amd64.tar.gz
tar -zxvf etcd-v3.4.16-linux-amd64.tar.gz
cd etcd*
mv etcdctl etcd /usr/local/bin
chmod +x /usr/local/bin/etcd*
複製代碼
- 準備證書文件
# 證書文件 ca-config.json etcd-ca-csr.json etcd-csr.json
cat ca-config.json
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "876000h"
}
}
}
}
cat etcd-ca-csr-json
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Shenzhen",
"L": "Shenzhen",
"O": "etcd",
"OU": "Etcd Security"
}
]
}
cat etcd-csr.json
{
"CN": "etcd",
"hosts": [
"127.0.0.1",
"10.211.55.50",
"10.211.55.51",
"10.211.55.52"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Shenzhen",
"L": "Shenzhen",
"O": "etcd",
"OU": "Etcd Security"
}
]
}
複製代碼
- 生成etcd-ca證書
cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare etcd-ca
# 查看證書文件
[root@etcd1 opt]# ls -al
total 36
drwxr-xr-x. 2 root root 186 May 13 21:53 .
dr-xr-xr-x. 17 root root 244 Oct 21 2020 ..
-rw------- 1 root root 294 Nov 27 2019 ca-config.json
-rw-r--r-- 1 root root 1005 May 13 21:53 etcd-ca.csr
-rw------- 1 root root 212 Nov 27 2019 etcd-ca-csr.json
-rw------- 1 root root 1675 May 13 21:53 etcd-ca-key.pem
-rw-r--r-- 1 root root 1371 May 13 21:53 etcd-ca.pem
-rw------- 1 root root 374 May 13 21:48 etcd-csr.json
複製代碼
- 生成etcd證書
cfssl gencert -ca=etcd-ca.pem -ca-key=etcd-ca-key.pem -config=ca-config.json -profile=kubernetes etcd-csr.json | cfssljson -bare etcd
# 查看證書
ls -al
[root@etcd1 opt]# ls -al
total 36
drwxr-xr-x. 2 root root 186 May 13 21:53 .
dr-xr-xr-x. 17 root root 244 Oct 21 2020 ..
-rw------- 1 root root 294 Nov 27 2019 ca-config.json
-rw-r--r-- 1 root root 1005 May 13 21:53 etcd-ca.csr
-rw------- 1 root root 212 Nov 27 2019 etcd-ca-csr.json
-rw------- 1 root root 1675 May 13 21:53 etcd-ca-key.pem
-rw-r--r-- 1 root root 1371 May 13 21:53 etcd-ca.pem
-rw-r--r-- 1 root root 1078 May 13 21:53 etcd.csr
-rw------- 1 root root 374 May 13 21:48 etcd-csr.json
-rw------- 1 root root 1679 May 13 21:53 etcd-key.pem
-rw-r--r-- 1 root root 1456 May 13 21:53 etcd.pem
複製代碼
- 複製到etcd的證書到證書目錄
mkdir -pv /etc/etcd/ssl && cp etcd*.pem /etc/etcd/ssl
# 複製證書目錄到其餘節點
scp -r /etc/etcd root@etcd2
scp -r /etc/etcd root@etcd3
複製代碼
- 配置成系統服務
cat etcd.service # 要根據每一個節點進行修改IP和name
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
Documentation=https://github.com/coreos
[Service]
Type=notify
WorkingDirectory=/var/lib/etcd/
EnvironmentFile=-/etc/etcd/etcd.conf
ExecStart=/usr/local/bin/etcd \
--name=etcd1 \
--cert-file=/etc/etcd/ssl/etcd.pem \
--key-file=/etc/etcd/ssl/etcd-key.pem \
--peer-cert-file=/etc/etcd/ssl/etcd.pem \
--peer-key-file=/etc/etcd/ssl/etcd-key.pem \
--trusted-ca-file=/etc/etcd/ssl/etcd-ca.pem \
--peer-trusted-ca-file=/etc/etcd/ssl/etcd-ca.pem \
--initial-advertise-peer-urls=https://10.211.55.50:2380 \
--listen-peer-urls=https://10.211.55.50:2380 \
--listen-client-urls=https://10.211.55.50:2379,http://127.0.0.1:2379 \
--advertise-client-urls=https://10.211.55.50:2379 \
--initial-cluster-token=etcd-cluster-0 \
--initial-cluster=etcd1=https://10.211.55.50:2380,etcd2=https://10.211.55.51:2380,etcd3=https://10.211.55.52:2380 \
--initial-cluster-state=new \
--data-dir=/var/lib/etcd
Restart=on-failure
RestartSec=5
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
複製代碼
- 啓動etcd
# 三個節點啓動etcd服務
systemctl daemon-reload && systemctl enable etcd && systemctl start etcd
複製代碼
8.檢查集羣狀態json
# 檢查member
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.52:2379 member list -w table
+------------------+---------+-------+---------------------------+---------------------------+------------+
| ID | STATUS | NAME | PEER ADDRS | CLIENT ADDRS | IS LEARNER |
+------------------+---------+-------+---------------------------+---------------------------+------------+
| ca2cb14b2acc776 | started | etcd3 | https://10.211.55.52:2380 | https://10.211.55.52:2379 | false |
| 31f517c6aefb1a37 | started | etcd1 | https://10.211.55.50:2380 | https://10.211.55.50:2379 | false |
| ad1ee26f89ef12f4 | started | etcd2 | https://10.211.55.51:2380 | https://10.211.55.51:2379 | false |
+------------------+---------+-------+---------------------------+---------------------------+------------+
# 查看是否有LD
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 endpoint status -w table
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| https://10.211.55.50:2379 | 31f517c6aefb1a37 | 3.4.16 | 25 kB | true | false | 645 | 54 | 54 | |
| https://10.211.55.51:2379 | ad1ee26f89ef12f4 | 3.4.16 | 20 kB | false | false | 645 | 54 | 54 | |
| https://10.211.55.52:2379 | ca2cb14b2acc776 | 3.4.16 | 20 kB | false | false | 645 | 54 | 54 | |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
# 嘗試寫入數據
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 put foo4 bar4
# 讀取數據
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get foo4
foo4
bar4
# 獲取全部key
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get --prefix --keys-only ''
foo
foo2
foo3
foo4
# 只獲取value
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get --print-value-only --prefix=true ''
bar
bar2
bar3
bar
# 獲取指定key、rev的數據
[root@etcd1 opt]# etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get foo4 -w json
{"header":{"cluster_id":9218922165880849559,"member_id":910513364439713654,"revision":10,"raft_term":645},"kvs":[{"key":"Zm9vNA==","create_revision":7,"mod_revision":10,"version":4,"value":"eGl5YW5neGl4aQ=="}],"count":1}
[root@etcd1 opt]# etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get foo4 -w json --rev=8
{"header":{"cluster_id":9218922165880849559,"member_id":3599809619259234871,"revision":10,"raft_term":645},"kvs":[{"key":"Zm9vNA==","create_revision":7,"mod_revision":8,"version":2,"value":"eGl5YW5neGl4aWE="}],"count":1}
複製代碼
2、成員變動
刪除成員
由於個人資源有限，因此先模擬刪除成員再添加成員。微信
# 先檢查集羣狀態並獲取成員ID
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 endpoint status -w table
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| https://10.211.55.50:2379 | 31f517c6aefb1a37 | 3.4.16 | 25 kB | true | false | 645 | 54 | 54 | |
| https://10.211.55.51:2379 | ad1ee26f89ef12f4 | 3.4.16 | 20 kB | false | false | 645 | 54 | 54 | |
| https://10.211.55.52:2379 | ca2cb14b2acc776 | 3.4.16 | 20 kB | false | false | 645 | 54 | 54 | |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
# 經過ID刪除成員，這裏以刪除10.211.55.52爲例
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379 member remove ca2cb14b2acc776
Member ca2cb14b2acc776 removed from cluster 7ff030ddad4d8497
# 檢查集羣狀態，只有兩個節點了
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 endpoint status -w table
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| https://10.211.55.50:2379 | 31f517c6aefb1a37 | 3.4.16 | 25 kB | true | false | 645 | 58 | 58 | |
| https://10.211.55.51:2379 | ad1ee26f89ef12f4 | 3.4.16 | 20 kB | false | false | 645 | 58 | 58 | |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
# 查看10.211.55.52 etcd狀態，發現etcd
systemctl status etcd
● etcd.service - Etcd Server
Loaded: loaded (/etc/systemd/system/etcd.service; enabled; vendor preset: disabled)
Active: inactive (dead) since Sun 2021-07-04 11:39:42 CST; 1min 31s ago
......
# 嘗試寫入數據
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379 put foo4 bar8
OK
# 嘗試獲取寫入的數據
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379 get foo4
foo4
bar8
複製代碼
添加成員
添加成員主要分爲兩步，一是經過etcdctl添加成員，二是根據第一部輸出的配置修改etcd配置並啓動etcdmarkdown
# 先經過etcdctl添加成員
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379 member add etcd3 --peer-urls="https://10.211.55.52:2380"
Member 89088d035064124d added to cluster 7ff030ddad4d8497
ETCD_NAME="etcd3"
ETCD_INITIAL_CLUSTER="etcd1=https://10.211.55.50:2380,etcd3=https://10.211.55.52:2380,etcd2=https://10.211.55.51:2380"
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.211.55.52:2380"
ETCD_INITIAL_CLUSTER_STATE="existing"
# 更改etcd配置並啓動etcd，注意要保證etcd數據目錄爲空
systemctl cat etcd
# /etc/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
Documentation=https://github.com/coreos
[Service]
Type=notify
WorkingDirectory=/var/lib/etcd/
EnvironmentFile=-/etc/etcd/etcd.conf
ExecStart=/usr/local/bin/etcd \
--name=etcd3 \
--cert-file=/etc/etcd/ssl/etcd.pem \
--key-file=/etc/etcd/ssl/etcd-key.pem \
--peer-cert-file=/etc/etcd/ssl/etcd.pem \
--peer-key-file=/etc/etcd/ssl/etcd-key.pem \
--trusted-ca-file=/etc/etcd/ssl/etcd-ca.pem \
--peer-trusted-ca-file=/etc/etcd/ssl/etcd-ca.pem \
--initial-advertise-peer-urls=https://10.211.55.52:2380 \
--listen-peer-urls=https://10.211.55.52:2380 \
--listen-client-urls=https://10.211.55.52:2379,http://127.0.0.1:2379 \
--advertise-client-urls=https://10.211.55.52:2379 \
--initial-cluster-token=etcd-cluster-0 \
--initial-cluster=etcd1=https://10.211.55.50:2380,etcd2=https://10.211.55.51:2380,etcd3=https://10.211.55.52:2380 \
--initial-cluster-state=existing \
--data-dir=/var/lib/etcd
Restart=on-failure
RestartSec=5
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
# 啓動etcd
systemctl start etcd && systemctl status etcd
# 檢查集羣狀態
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 endpoint status -w table
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| https://10.211.55.50:2379 | 31f517c6aefb1a37 | 3.4.16 | 25 kB | true | false | 645 | 62 | 62 | |
| https://10.211.55.51:2379 | ad1ee26f89ef12f4 | 3.4.16 | 20 kB | false | false | 645 | 62 | 62 | |
| https://10.211.55.52:2379 | 89088d035064124d | 3.4.16 | 20 kB | false | false | 645 | 62 | 62 | |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
複製代碼
3、數據備份
數據備份我這裏直接使用snapshot人工備份好了,僅用於測試而已。運維
# 先寫入一個數據，方便後面作測試
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 put xiyangxixi boys
OK
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get xiyangxixi
xiyangxixi
boys
# 備份數據
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379 snapshot save snapshot-xiyangxixi.db
{"level":"info","ts":1625373129.2212617,"caller":"snapshot/v3_snapshot.go:119","msg":"created temporary db file","path":"snapshot-xiyangxixi.db.part"}
{"level":"info","ts":"2021-07-04T12:32:09.228+0800","caller":"clientv3/maintenance.go:200","msg":"opened snapshot stream; downloading"}
{"level":"info","ts":1625373129.2287908,"caller":"snapshot/v3_snapshot.go:127","msg":"fetching snapshot","endpoint":"https://10.211.55.50:2379"}
{"level":"info","ts":"2021-07-04T12:32:09.231+0800","caller":"clientv3/maintenance.go:208","msg":"completed snapshot read; closing"}
{"level":"info","ts":1625373129.2318149,"caller":"snapshot/v3_snapshot.go:142","msg":"fetched snapshot","endpoint":"https://10.211.55.50:2379","size":"25 kB","took":0.010441635}
{"level":"info","ts":1625373129.2318769,"caller":"snapshot/v3_snapshot.go:152","msg":"saved","path":"snapshot-xiyangxixi.db"}
Snapshot saved at snapshot-xiyangxixi.db
複製代碼
4、集羣數據恢復
須要使用同一個備份文件。這裏以上面的snapshot-xiyangxixi.db進行模擬ide
# 注意：
# 一、最好指定一下data-dir我這裏沒指定，結果數據都到etcd1.etcd、etcd2.etcd、etcd3.etcd中去了，這樣子還得修改etcd.service文件
# 二、恢復數據前，以前的數據目錄記得備份
# 三、若是是單節點故障，能夠考慮刪除該節點再添加該節點
# etcd1上執行
etcdctl snapshot restore /root/snapshot-xiyangxixi.db --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --name etcd1 --initial-advertise-peer-urls=https://10.211.55.50:2380 --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd1=https://10.211.55.50:2380,etcd2=https://10.211.55.51:2380,etcd3=https://10.211.55.52:2380
{"level":"info","ts":1625373977.7445557,"caller":"snapshot/v3_snapshot.go:296","msg":"restoring snapshot","path":"/root/snapshot-xiyangxixi.db","wal-dir":"etcd1.etcd/member/wal","data-dir":"etcd1.etcd","snap-dir":"etcd1.etcd/member/snap"}
{"level":"info","ts":1625373977.7477813,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"517f2ff3c4b9581b","added-peer-peer-urls":["https://10.211.55.52:2380"]}
{"level":"info","ts":1625373977.7478256,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"6856401bd8388bec","added-peer-peer-urls":["https://10.211.55.50:2380"]}
{"level":"info","ts":1625373977.7478426,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"6ea7d2ec70c556d5","added-peer-peer-urls":["https://10.211.55.51:2380"]}
{"level":"info","ts":1625373977.7509031,"caller":"snapshot/v3_snapshot.go:309","msg":"restored snapshot","path":"/root/snapshot-xiyangxixi.db","wal-dir":"etcd1.etcd/member/wal","data-dir":"etcd1.etcd","snap-dir":"etcd1.etcd/member/snap"}
# etcd2上執行
etcdctl snapshot restore /root/snapshot-xiyangxixi.db --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --name etcd2 --initial-advertise-peer-urls=https://10.211.55.51:2380 --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd1=https://10.211.55.50:2380,etcd2=https://10.211.55.51:2380,etcd3=https://10.211.55.52:2380
{"level":"info","ts":1625374104.1673598,"caller":"snapshot/v3_snapshot.go:296","msg":"restoring snapshot","path":"/root/snapshot-xiyangxixi.db","wal-dir":"etcd2.etcd/member/wal","data-dir":"etcd2.etcd","snap-dir":"etcd2.etcd/member/snap"}
{"level":"info","ts":1625374104.1709266,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"517f2ff3c4b9581b","added-peer-peer-urls":["https://10.211.55.52:2380"]}
{"level":"info","ts":1625374104.1709714,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"6856401bd8388bec","added-peer-peer-urls":["https://10.211.55.50:2380"]}
{"level":"info","ts":1625374104.1709878,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"6ea7d2ec70c556d5","added-peer-peer-urls":["https://10.211.55.51:2380"]}
{"level":"info","ts":1625374104.1741195,"caller":"snapshot/v3_snapshot.go:309","msg":"restored snapshot","path":"/root/snapshot-xiyangxixi.db","wal-dir":"etcd2.etcd/member/wal","data-dir":"etcd2.etcd","snap-dir":"etcd2.etcd/member/snap"}
# etcd3上執行
etcdctl snapshot restore /root/snapshot-xiyangxixi.db --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --name etcd3 --initial-advertise-peer-urls=https://10.211.55.52:2380 --initial-cluster-token=etcd-cluster-1 --initial-cluster=etcd1=https://10.211.55.50:2380,etcd2=https://10.211.55.51:2380,etcd3=https://10.211.55.52:2380
{"level":"info","ts":1625374158.713205,"caller":"snapshot/v3_snapshot.go:296","msg":"restoring snapshot","path":"/root/snapshot-xiyangxixi.db","wal-dir":"etcd3.etcd/member/wal","data-dir":"etcd3.etcd","snap-dir":"etcd3.etcd/member/snap"}
{"level":"info","ts":1625374158.7164843,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"517f2ff3c4b9581b","added-peer-peer-urls":["https://10.211.55.52:2380"]}
{"level":"info","ts":1625374158.7165308,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"6856401bd8388bec","added-peer-peer-urls":["https://10.211.55.50:2380"]}
{"level":"info","ts":1625374158.7165465,"caller":"membership/cluster.go:392","msg":"added member","cluster-id":"a914ec3525c16b4","local-member-id":"0","added-peer-id":"6ea7d2ec70c556d5","added-peer-peer-urls":["https://10.211.55.51:2380"]}
{"level":"info","ts":1625374158.7190611,"caller":"snapshot/v3_snapshot.go:309","msg":"restored snapshot","path":"/root/snapshot-xiyangxixi.db","wal-dir":"etcd3.etcd/member/wal","data-dir":"etcd3.etcd","snap-dir":"etcd3.etcd/member/snap"}
# 啓動etcd
systemctl daemon-reload && systemctl start etcd
# 查看etcd集羣狀態
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 endpoint status -w table
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| https://10.211.55.50:2379 | 6856401bd8388bec | 3.4.16 | 25 kB | false | false | 4 | 8 | 8 | |
| https://10.211.55.51:2379 | 6ea7d2ec70c556d5 | 3.4.16 | 25 kB | true | false | 4 | 8 | 8 | |
| https://10.211.55.52:2379 | 517f2ff3c4b9581b | 3.4.16 | 25 kB | false | false | 4 | 8 | 8 | |
+---------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
# 獲取key爲xiyangxixi的數據
etcdctl --cacert /etc/etcd/ssl/etcd-ca.pem --cert /etc/etcd/ssl/etcd.pem --key /etc/etcd/ssl/etcd-key.pem --endpoints=https://10.211.55.50:2379,https://10.211.55.51:2379,https://10.211.55.52:2379 get xiyangxixi
xiyangxixi
boys
複製代碼
參考
相關文章
- 1. ETCD初學指南
- 2. Node.js 指南（入門指南）
- 3. etcd入門 & go操做etcd
- 4. Firebug入門指南
- 5. Git入門指南
- 6. pytorch 入門指南
- 7. Gulp入門指南
- 8. webpack 入門指南
- 9. Gulp4.0入門指南
- 10. MarkDown入門指南
- 更多相關文章...
- • SQL 指南 - 網站建設指南
- • HTML 指南 - 網站建設指南
- • YAML 入門教程
- • Java Agent入門實戰（一）-Instrumentation介紹與使用
相關標籤/搜索
每日一句
-
每一个你不满意的现在，都有一个你没有努力的曾经。
歡迎關注本站公眾號,獲取更多信息
相關文章
- 1. ETCD初學指南
- 2. Node.js 指南（入門指南）
- 3. etcd入門 & go操做etcd
- 4. Firebug入門指南
- 5. Git入門指南
- 6. pytorch 入門指南
- 7. Gulp入門指南
- 8. webpack 入門指南
- 9. Gulp4.0入門指南
- 10. MarkDown入門指南