Etcd v3.1.15 在Linux CentOS7 集群配置 (单机改端口实现)

上一篇:Etcd在Linux CentOS7下载、安装

 注意Etcd在每个版本都会有命令或功能变化,看教程时注意版本。

时间同步:

#根据提示选择所在大洲、国家和城市
[root@Cent0S7 ~]# tzselect
#使用阿里 NTP 校时
[root@Cent0S7 ~]# ntpdate ntp.aliyun.com
#系统时间同步BIOS硬件时间
[root@Cent0S7 ~]# hwclock -w
#-R 查看时区
[root@Cent0S7 ~]# date -R

  

单机部署三份(最少3台node才能组成集群,所以要三份),修改端口实现。

PS:很多人学习时,条件有限,没有3台电脑或3台VM虚拟机都开不起来。

新建目录:

[root@Cent0S7 ~]# mkdir /var/lib/etcd/
[root@Cent0S7 ~]# mkdir /var/lib/etcd1/
[root@Cent0S7 ~]# mkdir /var/lib/etcd2/

复制etcd(防止用一份出现奇怪的问题)

[root@Cent0S7 ~]# tar -zxf etcd-v3.1.5-linux-amd64.tar.gz 
[root@Cent0S7 ~]# cd etcd-v3.1.5-linux-amd64/
[root@Cent0S7 ~]# cp etcd /usr/local/sbin/etcd
[root@Cent0S7 ~]# cp etcd /usr/local/sbin/etcd1
[root@Cent0S7 ~]# cp etcd /usr/local/sbin/etcd2

创建守护进程  etcd.service  文件

[root@Cent0S7 ~]# cat <<EOF | sudo tee /etc/systemd/system/etcd.service
[Unit]
Description=Etcd Server
Documentation=https://github.com/coreos/etcd
After=network.target

[Service]
User=root
Type=notify
EnvironmentFile=/etc/etcd.conf
ExecStart=/usr/local/bin/etcd
Restart=on-failure
RestartSec=10s
LimitNOFILE=40000

[Install]
WantedBy=multi-user.target
EOF

创建守护进程 etcd1.service  文件

[root@Cent0S7 ~]# cat <<EOF | sudo tee /etc/systemd/system/etcd1.service
[Unit]
Description=Etcd1 Server
Documentation=https://github.com/coreos/etcd
After=network.target

[Service]
User=root
Type=notify
EnvironmentFile=/etc/etcd1.conf
ExecStart=/usr/local/bin/etcd1
Restart=on-failure
RestartSec=10s
LimitNOFILE=40000

[Install]
WantedBy=multi-user.target
EOF

创建守护进程 etcd2.service  文件

[root@Cent0S7 ~]# cat <<EOF | sudo tee /etc/systemd/system/etcd2.service
[Unit]
Description=Etcd2 Server
Documentation=https://github.com/coreos/etcd
After=network.target

[Service]
User=root
Type=notify
EnvironmentFile=/etc/etcd2.conf
ExecStart=/usr/local/bin/etcd2
Restart=on-failure
RestartSec=10s
LimitNOFILE=40000

[Install]
WantedBy=multi-user.target
EOF

  

创建配置文件 etcd.conf 文件,端口2379、2380

[root@Cent0S7 ~]# cat <<EOF | sudo tee /etc/etcd.conf 
#节点名称
ETCD_NAME=etcd
#数据存放位置
ETCD_DATA_DIR=/var/lib/etcd/
ETCD_LISTEN_PEER_URLS="http://192.168.200.132:2380"
ETCD_LISTEN_CLIENT_URLS="http://192.168.200.132:2379,http://127.0.0.1:2379"
#[cluster]
#leader多久发送一次心跳到followers,默认值是100ms
ETCD_HEARTBEAT_INTERVAL="200"
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.200.132:2380"
ETCD_INITIAL_CLUSTER_STATE="new"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS="http://192.168.200.132:2379"
ETCD_INITIAL_CLUSTER="etcd=http://192.168.200.132:2380,etcd1=http://192.168.200.132:3380,etcd2=http://192.168.200.132:4380"
EOF

ps : 如果不写127.0.0.1或localhost 在测试时 回环地址将被拒绝链接。

创建配置文件 etcd1.conf 文件,端口3379、3380

[root@Cent0S7 ~]# cat <<EOF | sudo tee /etc/etcd1.conf 
#节点名称
ETCD_NAME=etcd1
#数据存放位置
ETCD_DATA_DIR=/var/lib/etcd1/
ETCD_LISTEN_PEER_URLS="http://192.168.200.132:3380"
ETCD_LISTEN_CLIENT_URLS="http://192.168.200.132:3379,http://127.0.0.1:2379"
#[cluster]
#leader多久发送一次心跳到followers,默认值是100ms
ETCD_HEARTBEAT_INTERVAL="200"
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.200.132:3380"
ETCD_INITIAL_CLUSTER_STATE="new"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS="http://192.168.200.132:3379"
ETCD_INITIAL_CLUSTER="etcd=http://192.168.200.132:2380,etcd1=http://192.168.200.132:3380,etcd2=http://192.168.200.132:4380"
EOF

ps : 如果不写127.0.0.1或localhost 在测试时 回环地址将被拒绝链接。 

 创建配置文件 etcd2.conf 文件,端口4379、4380

[root@Cent0S7 ~]# cat <<EOF | sudo tee /etc/etcd2.conf  
#节点名称
ETCD_NAME=etcd2
#数据存放位置
ETCD_DATA_DIR=/var/lib/etcd2/
ETCD_LISTEN_PEER_URLS="http://192.168.200.132:4380"
ETCD_LISTEN_CLIENT_URLS="http://192.168.200.132:4379,http://127.0.0.1:2379"
#[cluster]
#leader多久发送一次心跳到followers,默认值是100ms
ETCD_HEARTBEAT_INTERVAL="200"
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.200.132:4380"
ETCD_INITIAL_CLUSTER_STATE="new"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS="http://192.168.200.132:4379"
ETCD_INITIAL_CLUSTER="etcd=http://192.168.200.132:2380,etcd1=http://192.168.200.132:3380,etcd2=http://192.168.200.132:4380"
EOF

 ps : 如果不写127.0.0.1或localhost 在测试时 回环地址将被拒绝链接。

配置都完成了,刷新

[root@Cent0S7 ~]#   systemctl daemon-reload

  

启动节点

PS:启动时光标一直闪,也没报错,因为其他节点还没启动,所以在查找,不用管,多开几个CRT的Shell窗口启动每个service就可以 了。

[root@Cent0S7 ~]# systemctl start etcd.service
[root@Cent0S7 ~]# systemctl start etcd1.service
[root@Cent0S7 ~]# systemctl start etcd2.service

  

开机启动

[root@Cent0S7 ~]# systemctl enable etcd.service
Created symlink from /etc/systemd/system/multi-user.target.wants/etcd.service to /etc/systemd/system/etcd.service.

[root@Cent0S7 ~]# systemctl enable etcd1.service
Created symlink from /etc/systemd/system/multi-user.target.wants/etcd1.service to /etc/systemd/system/etcd1.service.

[root@Cent0S7 ~]# systemctl enable etcd2.service
Created symlink from /etc/systemd/system/multi-user.target.wants/etcd2.service to /etc/systemd/system/etcd2.service.

  

查看列表里状态,状态enabled,设置成功

[root@Cent0S7 etc]# systemctl list-unit-files etcd*.service
UNIT FILE     STATE   
etcd.service  enabled
etcd1.service enabled 
etcd2.service enabled

3 unit files listed.

 开放防火墙端口

firewall-cmd --zone=public --add-port=2379/tcp --permanent
firewall-cmd --zone=public --add-port=2380/tcp --permanent
firewall-cmd --reload
firewall-cmd --list-all

 

日志滚动显示最新的,用Ctrl+c退出

[root@Cent0S7 ~]# journalctl -ef

查看服务状态

[root@Cent0S7 ~]# systemctl status etcd -l
● etcd.service - Etcd Server
   Loaded: loaded (/etc/systemd/system/etcd.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2020-11-30 15:40:52 CST; 6min ago
     Docs: https://github.com/coreos/etcd
 Main PID: 2338 (etcd)
   CGroup: /system.slice/etcd.service
           └─2338 /usr/local/bin/etcd

Nov 30 15:40:56 Cent0S7 etcd[2338]: cannot get the version of member e9f1bc7810aec2f3 (Get http://192.168.200.132:3380/version: dial tcp 192.168.200.132:3380: getsockopt: connection refused)
Nov 30 15:40:59 Cent0S7 etcd[2338]: health check for peer e9f1bc7810aec2f3 could not connect: dial tcp 192.168.200.132:3380: getsockopt: connection refused
Nov 30 15:40:59 Cent0S7 etcd[2338]: peer e9f1bc7810aec2f3 became active
Nov 30 15:40:59 Cent0S7 etcd[2338]: established a TCP streaming connection with peer e9f1bc7810aec2f3 (stream MsgApp v2 reader)
Nov 30 15:40:59 Cent0S7 etcd[2338]: established a TCP streaming connection with peer e9f1bc7810aec2f3 (stream Message reader)
Nov 30 15:40:59 Cent0S7 etcd[2338]: established a TCP streaming connection with peer e9f1bc7810aec2f3 (stream MsgApp v2 writer)
Nov 30 15:40:59 Cent0S7 etcd[2338]: established a TCP streaming connection with peer e9f1bc7810aec2f3 (stream Message writer)
Nov 30 15:41:00 Cent0S7 etcd[2338]: updating the cluster version from 3.0 to 3.1
Nov 30 15:41:00 Cent0S7 etcd[2338]: updated the cluster version from 3.0 to 3.1
Nov 30 15:41:00 Cent0S7 etcd[2338]: enabled capabilities for version 3.1

 

 验证:

[root@Cent0S7 ~]# etcdctl --endpoints="http://192.168.200.132:2379,http://192.168.200.132:3379,http://192.168.200.132:4379" member list
232f7a21c3110c92, started, etcd2, http://192.168.200.132:4380, http://192.168.200.132:4001,http://192.168.200.132:4379
3942148265deeadf, started, etcd, http://192.168.200.132:2380, http://192.168.200.132:2379,http://192.168.200.132:4001
e9f1bc7810aec2f3, started, etcd1, http://192.168.200.132:3380, http://192.168.200.132:3379,http://192.168.200.132:4001

  

[root@Cent0S7 ~]# etcdctl -w="table" --endpoints=192.168.200.132:2379 member list          
+------------------+---------+-------+-----------------------------+---------------------------------------------------------+
|        ID        | STATUS  | NAME  |         PEER ADDRS          |                      CLIENT ADDRS                       |
+------------------+---------+-------+-----------------------------+---------------------------------------------------------+
| 232f7a21c3110c92 | started | etcd2 | http://192.168.200.132:4380 | http://192.168.200.132:4001,http://192.168.200.132:4379 |
| 3942148265deeadf | started | etcd  | http://192.168.200.132:2380 | http://192.168.200.132:2379,http://192.168.200.132:4001 |
| e9f1bc7810aec2f3 | started | etcd1 | http://192.168.200.132:3380 | http://192.168.200.132:3379,http://192.168.200.132:4001 |
+------------------+---------+-------+-----------------------------+---------------------------------------------------------+

  

[root@Cent0S7 ~]# etcdctl --write-out=table --endpoints=192.168.200.132:2379,192.168.200.132:3379,192.168.200.132:4379  endpoint status
+----------------------+------------------+---------+---------+-----------+-----------+------------+
|       ENDPOINT       |        ID        | VERSION | DB SIZE | IS LEADER | RAFT TERM | RAFT INDEX |
+----------------------+------------------+---------+---------+-----------+-----------+------------+
| 192.168.200.132:2379 | 3942148265deeadf | 3.1.5   | 25 kB   | true      |         7 |          9 |
| 192.168.200.132:3379 | e9f1bc7810aec2f3 | 3.1.5   | 25 kB   | false     |         7 |          9 |
| 192.168.200.132:4379 | 232f7a21c3110c92 | 3.1.5   | 25 kB   | false     |         7 |          9 |
+----------------------+------------------+---------+---------+-----------+-----------+------------+

 

批量关闭、清除缓存:

[root@Cent0S7 ~]# cat <<EOF | sudo tee etcd_all_stop.sh 
# /bin/bash
echo  " ------ etcd_all stop--------------"
echo "" echo " ------ etcd stop--------------" systemctl stop etcd.service echo " ------ etcd2 stop--------------" systemctl stop etcd1.service echo " ------ etcd3 stop--------------" systemctl stop etcd2.service echo "" echo " ------ clear etcd cache --------------" rm -rf /var/lib/etcd/ mkdir -p /var/lib/etcd/ echo " ------ clear etcd1 cache --------------" rm -rf /var/lib/etcd1/ mkdir -p /var/lib/etcd1/ echo " ------ clear etcd2 cache --------------" rm -rf /var/lib/etcd2/ mkdir -p /var/lib/etcd2/ echo "" echo "-------etcd_all stop and clear OK ------------"
echo
echo EOF

  

 

 

以下是配置变量说明参考:

#单机配置
# [member]
# etcd集群中的节点名,这里可以随意,可区分且不重复就行 
ETCD_NAME=$(hostname -s)

#缓存数据存放位置,保存日志和快照的目录,默认为当前工作目录default.etcd/目录下
#新该配置后,要删除缓存,否则启动还是要用之前的缓存。
ETCD_DATA_DIR=/var/lib/etcd/
#ETCD_WAL_DIR=""

#指定有多少事务被提交时,触发和截取快照保存到磁盘
#ETCD_SNAPSHOT_COUNT="10000"

#leader多久发送一次心跳到followers,默认值是100ms
#ETCD_HEARTBEAT_INTERVAL="100"

#重新投票的超时时间,如果follow在该时间间隔没有收到心跳包,会触发重新投票,默认为1000ms。
#ETCD_ELECTION_TIMEOUT="1000"

#监听的用于节点之间通信的url,可监听多个,集群内部将通过这些url进行数据交互(如选举,数据同步等)
ETCD_LISTEN_PEER_URLS="http://localhost:2380"

#监听的用于客户端通信的url,同样可以监听多个。
#如果不写htt://localhost:2379,http://127.0.0.1:2379的本地回环地址,测试时localhost和127.0.0.1将拒绝连接
ETCD_LISTEN_CLIENT_URLS="http://localhost:4001,http://localhost:2379"

#要保留的最大快照文件数(0表示不受限制),Windows上的用户默认值不受限制
#ETCD_MAX_SNAPSHOTS="5"

#要保留的最大wal文件数(0表示不受限制),Windows上的用户默认值不受限制
#ETCD_MAX_WALS="5"

#逗号分隔的CORS原始白名单(跨源资源共享)
#ETCD_CORS=""
#
#集群配置
#[cluster]
#告知集群其他节点的URL,建议用于节点之间通信的url,节点间将以该值进行通信,一般是2380端口。
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://localhost:2380"

#也就是集群中所有的initial-advertise-peer-urls 的合集,
#所有节点的IP都写在下面,etcd-node1、etcd-node2、etcd-node3根据实际情况改成相应ip或hostname
ETCD_INITIAL_CLUSTER="etcd-node1=http://etcd-node1:2380,etcd-node2=http://etcd-node2:2380,etcd-master=http://etcd-master:2380"

#新建集群的标志 new和existing,即加入与被加入
ETCD_INITIAL_CLUSTER_STATE="new"

#自定义的一个token值,设置该值后集群将生成唯一id,并为每个节点也生成唯一id,当使用相同配置文件再启动一个集群时,只要该token值不一样,etcd集群就不会相互影响。
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"

#建议使用的客户端通信url,该值用于etcd代理或etcd成员与etcd节点通信。 
ETCD_ADVERTISE_CLIENT_URLS="http://localhost:2379"

  

  

 

 #####################   报错  #################################

错误:

 Error:  grpc: timed out when dialing

 解决方法:将心跳值设置到200在试试

 

#####################   报错  #################################

 

参考文章:

http://blog.51cto.com/zlyang/1951164

http://cnblogs.com/davygeek/p/7154780.html 老版本端口4001 V3.3.5

http://dazhuanlan.com/2019/12/13/5df3ad5424c46/

http://cnblogs.com/linuxws/p/11194403.html  配置文件详解

 

http://localhost:2379
posted @ 2020-11-30 15:51  悟透  阅读(1123)  评论(0编辑  收藏  举报