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