LVS+Keepalived+Mysql+主備數據庫架構
阿新 • • 發佈：2018-01-26
pos extra top k with 定義 compiler probe http 不一致
這是一個坑...磨了不少時間。見證自己功力有待提升。。。
架構圖
數據庫
1.安裝數據庫
這塊不難， 直接引用： mysql安裝
2.數據庫主備
這塊不難， 直接引用： mysql主備
虛擬VIP
重點來了！！
上腳本， 把這個腳本命名後仍進/etc/init.d， 然後授予權限755或者+x
SNS_VIP=192.168.158.110
/etc/rc.d/init.d/functions
case "$1" in
start)
ifconfig eth0:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP
/sbin/route add -host $SNS_VIP dev eth0:0
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
sysctl -p >/dev/null 2>&1
echo "RealServer Start OK"
;;
stop)
ifconfig eth0:0 down
route del $SNS_VIP >/dev/null 2>&1
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
echo "RealServer Stoped"
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
exit 0啟動這個腳本後會出現虛擬ip， 啟動方法service realserver start
查看有好幾種方式
第一種: ifconfig
第二種: ip addr
第三種: ifconfig eth0:0
好了, 虛擬ip也有了,記得兩臺mysql是一樣的操作。
LVS
重點！
1.依賴：
yum install -y libnl* popt* rpm -ivh popt-static-1.13-7.el6.x86_64.rpm 第二個是後面發現缺少, 恰恰yum中也沒有的安裝而獨自下載rpm 包
2.查看是否已加載lvs模塊
modprobe -l |grep ipvs
3.正常的情況下是這樣的:
[root@localhost init.d]# modprobe -l |grep ipvs kernel/net/netfilter/ipvs/ip_vs.ko kernel/net/netfilter/ipvs/ip_vs_rr.ko kernel/net/netfilter/ipvs/ip_vs_wrr.ko kernel/net/netfilter/ipvs/ip_vs_lc.ko kernel/net/netfilter/ipvs/ip_vs_wlc.ko kernel/net/netfilter/ipvs/ip_vs_lblc.ko kernel/net/netfilter/ipvs/ip_vs_lblcr.ko kernel/net/netfilter/ipvs/ip_vs_dh.ko kernel/net/netfilter/ipvs/ip_vs_sh.ko kernel/net/netfilter/ipvs/ip_vs_sed.ko kernel/net/netfilter/ipvs/ip_vs_nq.ko kernel/net/netfilter/ipvs/ip_vs_ftp.ko [root@localhost init.d]#
4.安裝正包
tar -zxvf ipvsadm-1.26.tar.gz make && make install
5.編譯安裝完成後測試:
ipvsadm -L -n
[root@localhost init.d]# ipvsadm -ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn
lvs大功告成!
Keepalived
重點!!
1.安裝依賴
yum install -y kernel-devel openssl openssl-devel
2.編譯安裝
新建安裝目錄
mkdir -p /usr/local/keepalived
編譯
./configure --prefix=/usr/local/keepalived --with-kernel-dir=/usr/src/kernels/2.6.32-358.el6.x86_64/
Keepalived configuration ------------------------ Keepalived version : 1.2.13 Compiler : gcc Compiler flags : -g -O2 Extra Lib : -lssl -lcrypto -lcrypt Use IPVS Framework : Yes IPVS sync daemon support : Yes IPVS use libnl : No fwmark socket support : Yes Use VRRP Framework : Yes Use VRRP VMAC : Yes SNMP support : No SHA1 support : No Use Debug flags : No
註意: 這裏的2.6.32-358.el6.x86_64是您的內核, 不要照抄哦, 可能咋們內核不一致
安裝
make && make install
3.其他操作
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/ cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ cp /usr/local/keepalived/sbin/keepalived /usr/sbin/ chkconfig keepalived on
LVS+Keepalived配置
~~負載均衡主機~~
1.新建keepalived配置文件:
vim /etc/keepalived/keepalived.conf
2.keepalived.conf詳細:
! Configuration File for keepalived
global_defs { #全局標識模塊
notification_email { #定義郵件通知
[email protected] #目標郵箱
}
notification_email_from [email protected] #發送郵箱
smtp_server 127.0.0.1 #發送郵箱的smtp服務器
smtp_connect_timeout 30 #smtp服務器連接超時時間
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER #本實例啟動狀態：MASTER/BACKUP
interface eth0 #監控的網絡接口
virtual_router_id 51 #vrrp實例（同一個組主備服務器設置一樣）
priority 100 #優先級高的為master，不能超過255。（BACKUP可設置為50）
advert_int 1 #均衡器檢測間隔1秒（服務器設置都一樣）
authentication { #驗證類型及密碼（服務器設置都一樣）
auth_type PASS #認證方式，PASS或AH
auth_pass 123456 #認證密碼
}
virtual_ipaddress { #虛擬ip地址virtual_ipaddress,可以定義多個
192.168.158.110
}
}
virtual_server 192.168.158.110 3306 { #定義虛擬服務器，與上面的virtual_server一樣
delay_loop 3 #健康檢查時間間隔，6秒
lb_algo wrr #負載均衡調度算法：rr|wrr|lc|wlc|sh|dh|lblc
lb_kind DR #負載均衡轉發規則：NAT|DR|TUN
nat_mask 255.255.255.0
#persistence_timeout 50 #回話保持時間50秒，動態服務建議開啟
protocol TCP #轉發協議protocol，一般有tcp和udp兩種
#後端真實服務器，有幾臺就設置幾個
real_server 192.168.158.134 3306 {
weight 1 #權重越大負載分越大，0表示失效
SSL_GET { #健康檢查方式：HTTP_GET|SSL_GET|TCP_CHECK|SMTP_CHECK|MISC_CHECK
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
real_server 192.168.158.139 3306 {
weight 1
SSL_GET {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
}
3.附上啟動腳本
#!/bin/sh
#
# Startup script for the Keepalived daemon
#
# processname: keepalived
# pidfile: /var/run/keepalived.pid
# config: /etc/keepalived/keepalived.conf
# chkconfig: - 21 79
# description: Start and stop Keepalived
# Source function library
. /etc/rc.d/init.d/functions
# Source configuration file (we set KEEPALIVED_OPTIONS there)
. /etc/sysconfig/keepalived
RETVAL=0
prog="keepalived"
start() {
echo -n $"Starting $prog: "
daemon keepalived ${KEEPALIVED_OPTIONS}
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/$prog
}
stop() {
echo -n $"Stopping $prog: "
killproc keepalived
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/$prog
}
reload() {
echo -n $"Reloading $prog: "
killproc keepalived -1
RETVAL=$?
echo
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
reload)
reload
;;
restart)
stop
start
;;
condrestart)
if [ -f /var/lock/subsys/$prog ]; then
stop
start
fi
;;
status)
status keepalived
RETVAL=$?
;;
*)
echo "Usage: $0 {start|stop|reload|restart|condrestart|status}"
RETVAL=1
esac
exit $RETVAL
4.檢測keepalived
service keepalived start service keepalived stop service keepalived status
5.檢測lvs
ipvsadm
lvs數據參考:
[root@localhost init.d]# ipvsadm IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.158.110:mysql wrr -> 192.168.158.134:mysql Route 1 0 0 -> 192.168.158.139:mysql Route 1 0 0
~~負載均衡備機~~
備機負載服務器與主負載服務器大致相同，只是在keepalived的配置文件中需要改以下兩處：
（1）將state由MASTER改為BACKUP
（2）將priority由100改為99
lvs+keepalived大功告成!!
驗證性測試
1.啟動mysql(兩臺)
service mysqld start
2.啟動vip
service realserver start
3.啟動keepalived(兩臺)
service keepalived start
4.使用本地ping vip
5.使用本地連接mysql(連接的是vip)
mysql.exe -u root -p"lizhenghua" -P 3306 -h 192.168.158.110
6.在從庫139上建立數據庫cheng(先斷開主從)
192.168.158.139
192.168.158.134
完成!!
LVS+Keepalived+Mysql+主備數據庫架構