2019獨角獸企業重金招聘Python工程師標準>>>

1 高可用安裝

1.1 集群信息

主機	IP	組件
bdc212	192.168.13.212	LVS:ipvsadm-1.27-7.el7.x86_64.rpm Keepalived: keepalived-1.2.4.tar.gz 應用：Percona-XtraDB-Cluster
bdc213	192.168.13.213	LVS:ipvsadm-1.27-7.el7.x86_64.rpm Keepalived: keepalived-1.2.4.tar.gz 應用：Percona-XtraDB-Cluster
bdc214	192.168.13.214	應用：Percona-XtraDB-Cluster

1.2 安裝準備

• 上傳安裝所需的壓縮包到/opt目錄

????????keepalived-1.2.4.tar.gz

????????(http://www.keepalived.org/software/keepalived-1.2.4.tar.gz)

• 安裝組件所需依賴包

yum install openssl-devel popt-devel libnl* -y

1.3 安裝LVS+keepalived

????????在兩臺Director Server上分別安裝LVS+Keepalived，BACKUP服務器與MASTER服務器一致，先安裝lvs再安裝keepalived。

1.3.3 安裝LVS

????????Ipvs(IP Virtual Server)是整個負載均衡的基礎，沒有這個基礎，故障隔離與失敗切換就毫無意義了。

yum install ipvsadm –y

1.3.4 安裝keepalived

解壓包：

tar zxvf keepalived-1.2.4.tar.gz

初始化：

cd keepalived-1.2.4 ./configure --prefix=/usr/local/keepalived Keepalived configuration ------------------------ Keepalived version : 1.2.4 Compiler : gcc Compiler flags : -g -O2 Extra Lib : -lpopt -lssl -lcrypto -lnl Use IPVS Framework : Yes IPVS sync daemon support : Yes IPVS use libnl : Yes Use VRRP Framework : Yes Use VRRP VMAC : Yes Use Debug flags : No

?編譯并安裝：

make&&make install Make complete make -C keepalived install make[1]: Entering directory `/root/Desktop/keepalived-1.2.1/keepalived' install -d /usr/local/keepalived/sbin install -m 700 ../bin/keepalived /usr/local/keepalived/sbin/ install -d /usr/local/keepalived/etc/rc.d/init.d install -m 755 etc/init.d/keepalived.init /usr/local/keepalived/etc/rc.d/init.d/keepalived install -d /usr/local/keepalived/etc/sysconfig install -m 755 etc/init.d/keepalived.sysconfig /usr/local/keepalived/etc/sysconfig/keepalived install -d /usr/local/keepalived/etc/keepalived/samples install -m 644 etc/keepalived/keepalived.conf /usr/local/keepalived/etc/keepalived/ install -m 644 ../doc/samples/* /usr/local/keepalived/etc/keepalived/samples/ install -d /usr/local/keepalived/share/man/man5 install -d /usr/local/keepalived/share/man/man8 install -m 644 ../doc/man/man5/keepalived.conf.5 /usr/local/keepalived/share/man/man5 install -m 644 ../doc/man/man8/keepalived.8 /usr/local/keepalived/share/man/man8 make[1]: Leaving directory `/root/Desktop/keepalived-1.2.1/keepalived' make -C genhash install make[1]: Entering directory `/root/Desktop/keepalived-1.2.1/genhash' install -d /usr/local/keepalived/bin install -m 755 ../bin/genhash /usr/local/keepalived/bin/ install -d /usr/local/keepalived/share/man/man1 install -m 644 ../doc/man/man1/genhash.1 /usr/local/keepalived/share/man/man1 make[1]: Leaving directory `/root/Desktop/keepalived-1.2.1/genhash'

1.4 配置路由轉發

????1> 更改配置文件

vi /etc/sysctl.conf

????????net.ipv4.ip_forward = 1

??? 2> 刷新系統配置

sysctl -p

1.5 配置keepalived.cnf

????????keepalived的配置分為三類： 全局配置（global configuration），VRRPD配置，LVS配置。

????????全局配置就是對整個keepalived起效的配置，不管是否使用LVS。VRRPD是keepalived的核心，LVS配置只在要使用keepalived來配置的管理LVS時需要使用，如果僅僅使用keepalived來做HA，LVS的配置是不需要的。如果在只有一個負載均衡器的場合，就不須 VRRP 實例定義塊。

mkdir /etc/keepalived vi /etc/keepalived/keepalived.conf ! Configuration File for keepalivedglobal_defs {router_id LVS_MASTER #BACKUP LVS_BACKUP }vrrp_instance VI_1 {state MASTER #BACKUP BACKUPinterface eno16777736virtual_router_id 51priority 100 #BACKUP 80advert_int 1nopreemptauthentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.252.199} }virtual_server 192.168.252.199 3306 {delay_loop 6lb_algo rrlb_kind NAT # persistence_timeout 5protocol TCPreal_server 192.168.252.159 3306 {weight 3TCP_CHECK {connect_timeout 3nb_get_retry 3delay_before_retry 3connect_port 3306}}real_server 192.168.252.160 3306 {weight 3TCP_CHECK {connect_timeout 3nb_get_retry 3delay_before_retry 3connect_port 3306}}real_server 192.168.252.161 3306 {weight 3TCP_CHECK {connect_timeout 3nb_get_retry 3delay_before_retry 3connect_port 3306}} }

??????? 注：配置backup的/etc/keepalived/keepalived.conf，只需將批注部分改一下即可。

?

2 keepalived集群啟動

2.1 master節點啟動

/usr/local/keepalived/sbin/keepalived start

檢查虛擬IP啟動情況

方法1：

tail -30 /var/log/message Jun 15 16:24:25 localhost Keepalived_vrrp[54297]: Interface queue is empty Jun 15 16:24:25 localhost Keepalived_vrrp[54297]: No such interface, virbr0 Jun 15 16:24:25 localhost Keepalived_vrrp[54297]: No such interface, virbr0-nic Jun 15 16:24:25 localhost Keepalived_vrrp[54297]: Registering Kernel netlink reflector Jun 15 16:24:25 localhost Keepalived_vrrp[54297]: Registering Kernel netlink command channel Jun 15 16:24:25 localhost Keepalived_vrrp[54297]: Registering gratuitous ARP shared channel Jun 15 16:24:25 localhost Keepalived_vrrp[54297]: Opening file '/etc/keepalived/keepalived.conf'. Jun 15 16:24:25 localhost Keepalived_vrrp[54297]: Configuration is using : 61916 Bytes Jun 15 16:24:25 localhost Keepalived_vrrp[54297]: Using LinkWatch kernel netlink reflector... Jun 15 16:24:25 localhost Keepalived_healthcheckers[54296]: Activating healthchecker for service [192.168.252.199]:3306 Jun 15 16:24:25 localhost Keepalived_healthcheckers[54296]: Activating healthchecker for service [192.168.252.199]:3306 Jun 15 16:24:25 localhost Keepalived_healthcheckers[54296]: Activating healthchecker for service [192.168.252.199]:3306 Jun 15 16:24:25 localhost Keepalived_vrrp[54297]: VRRP_Instance(VI_1) Transition to MASTER STATE Jun 15 16:24:26 localhost Keepalived_vrrp[54297]: VRRP_Instance(VI_1) Entering MASTER STATE Jun 15 16:24:26 localhost avahi-daemon[768]: Registering new address record for 192.168.252.199 on eno16777736.IPv4.

方法2：

[root@localhost Desktop]#ip addr

????????

2.2 backup節點啟動

/usr/local/keepalived/sbin/keepalived start

2.3 查看路由分發情況

查看ipvsadm

[root@localhost Desktop]#ipvsadm

????????

也能夠通過mysqladmin查看本地mysql服務連接狀況

/opt/percona/bin/mysqladmin -uroot -p123456 status

????????

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3 PXC故障測試

3.1 殺死mysql服務

????????殺死節點三上的mysql服務

kill -9 mysqld’s pid

3.2 查看ipvsadm

[root@localhost Desktop]# ipvsadm

????????

???????? 注：負載均衡服務解除了節點三，只向節點一二分發包。

3.3 重啟mysql服務

/usr/share/percona-xtradb-cluster/mysql.server start

3.4 再查看ipvsadm

[root@localhost Desktop]# ipvsadm

????????

??????? 注：負載均衡服務重新把節點三放入了路由分發列表。

?

4 高可用測試

4.1 殺死master的KP服務

Kill -9 keepalived'pid

4.2 查看組建工作情況

????1> VIP持有情況：

????????查看master ip：#ip add

????????????Master釋放了VIP：192.168.13.100

????????查看backup ip：#ip add

????????????Backup接收了VIP：192.168.13.100,繼續提供負載均衡服務

????2> ipvsadm工作情況

查看master Ipvsadm:負載均衡沒有工作

[root@localhost keepalived-1.2.4]# ipvsadm

?????????

查看backup ipvsadm:負載均衡仍然提供服務

[root@localhost keepalived-1.2.4]# ipvsadm

????????

轉載于:https://my.oschina.net/puwenchao/blog/753255

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