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colben
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@ -5,27 +5,34 @@ lastmod: 2019-10-30T11:22:03+08:00
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tags: ["keepalived", "高可用", "负载均衡"]
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categories: ["ha/lb"]
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---
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## 两个 haproxy 不抢占
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## keepalive 服务器
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- 环境
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- haproxy 服务器
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- haproxy101: 10.1.1.101
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- haproxy102: 10.1.1.102
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- 应用服务器
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- ka101: 10.1.1.101
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- ka102: 10.1.1.102
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- 虚拟地址
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- ip: 10.1.1.100
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- 在全部 haproxy 服务器上安装 keepalived
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- 安装 keepalived
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```bash
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yum install keepalived
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```
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- 在全部 haproxy 服务器上配置 haproxy 和 keepalived 自启动
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- 配置虚拟 ip
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```bash
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systemctl enable haproxy
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systemctl enable keepalived
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echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
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echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
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echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
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echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
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ip addr add 10.1.1.100/32 brd 10.1.1.100 dev lo
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ip route add 10.1.1.100 dev lo
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```
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## 两个 haproxy 不抢占
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- MASTER/BACKUP 完整配置
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```
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global_defs {
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router_id haproxy101 #BACKUP 这里是 haproxy102
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router_id ka101 #BACKUP 这里是 ka102
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script_user root
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enable_script_security
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}
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@ -58,11 +65,6 @@ categories: ["ha/lb"]
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## 两个 LVS-DR 调度器不抢占均衡后端 MySQL 和 Ceph 负载
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- 环境
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- keepalived 服务器
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- ka101: 10.1.1.101
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- ka102: 10.1.1.102
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- 虚拟地址
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- ip: 10.1.1.100
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- mysqld 服务器
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- mysql103: 10.1.1.103
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- mysql104: 10.1.1.104
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@ -71,19 +73,12 @@ categories: ["ha/lb"]
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- ceph106: 10.1.1.106
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- ceph107: 10.1.1.107
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- ceph108: 10.1.1.108
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- 在全部 keepalived 服务器上安装 keepalived
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```bash
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yum install keepalived
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```
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- 在全部 keepalived 服务器上配置 keepalived 自启动
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```bash
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systemctl enable keepalived
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```
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- MASTER/BACKUP 完整配置
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- 全局和实例配置
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```
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global_defs {
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router_id keepalive101 #BACKUP 配置 keepalive102
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router_id ka101 #BACKUP 配置 ka102
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}
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vrrp_instance V1_1 {
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state BACKUP #BACKUP 也配置 BACKUP
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@ -101,6 +96,7 @@ categories: ["ha/lb"]
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}
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}
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```
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- LVS 均衡 mysql galera cluser 负载
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```
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virtual_server 10.1.1.100 3306 {
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@ -134,6 +130,7 @@ categories: ["ha/lb"]
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}
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}
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```
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- LVS 均衡 ceph radosgw 负载
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```
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virtual_server 10.1.1.100 7480 {
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@ -182,36 +179,12 @@ categories: ["ha/lb"]
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}
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}
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```
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- 在全部 mysql 和 ceph-radosgw 服务器上配置虚拟 ip
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```bash
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echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
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echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
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echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
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echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
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ip addr add 10.1.1.100/32 brd 10.1.1.100 dev lo
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ip route add 10.1.1.100 dev lo
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```
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## 不抢占自动切换两台 Redis 主从状态
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- 环境
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- Redis 服务器
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- redis101: 10.1.1.101
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- redis102: 10.1.1.102
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- 虚拟地址
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- ip: 10.1.1.100
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- 在全部 redis 服务器上安装 keepalived
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```bash
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yum install keepalived
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```
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- 在全部 redis 服务器上配置 redis 和 keepalived 自启动
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```bash
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systemctl enable redis
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systemctl enable keepalived
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```
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- MASTER/BACKUP 完整配置
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```
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global_defs {
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router_id redis101 #BACKUP 这里是 redis102
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router_id ka101 #BACKUP 这里是 ka102
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script_user root
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enable_script_security
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}
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@ -243,6 +216,7 @@ categories: ["ha/lb"]
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}
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}
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```
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- 在全部 redis 服务器上创建 /etc/keepalived/scripts/master.sh 脚本，内容如下
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```bash
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#!/bin/bash
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@ -250,7 +224,8 @@ categories: ["ha/lb"]
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/usr/bin/sed -i '/^slaveof/d' /etc/redis.conf
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/usr/bin/systemctl restart redis
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```
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- 在 redis101 上创建 /etc/keepalived/scripts/backup.sh 脚本，内容如下
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- 在 ka101 上创建 /etc/keepalived/scripts/backup.sh 脚本，内容如下
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```bash
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#!/bin/bash
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#
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@ -258,7 +233,8 @@ categories: ["ha/lb"]
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echo 'slaveof 10.1.1.102 6379' >> /etc/redis.conf
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/usr/bin/systemctl restart redis
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```
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- 在 redis102 上创建 /etc/keepalived/scripts/backup.sh 脚本，内容如下
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- 在 ka102 上创建 /etc/keepalived/scripts/backup.sh 脚本，内容如下
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```bash
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#!/bin/bash
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#
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@ -266,10 +242,12 @@ categories: ["ha/lb"]
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echo 'slaveof 10.1.1.101 6379' >> /etc/redis.conf
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/usr/bin/systemctl restart redis
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```
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- 在全部 redis 服务器上赋予脚本可执行权限
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```bash
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chmod 0755 /etc/keepalived/scripts/*.sh
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```
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- 修改 redis 配置
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```
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requirepass redis_password
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@ -277,9 +255,4 @@ categories: ["ha/lb"]
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maxmemory 4294967296
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maxmemory-policy volatile-lru
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```
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- 在全部 redis 服务器上启动 redis 和 keepalived 服务
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```bash
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systemctl start redis
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systemctl start keepalived
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```
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