安裝ansible

安裝ansible： [root@localhost ~]# tail -5 /etc/hosts 192.168.19.129 web129.yanglt.com web129 192.168.19.130 web130.yanglt.com web130 192.168.19.131 web131.yanglt.com web131 192.168.19.132 web132.yanglt.com web132[root@localhost ~]# vim /etc/hosts [root@localhost ~]# yum -y install epel-release [root@localhost ~]# yum -y install ansible [root@localhost ~]# ssh-keygen [root@localhost ~]# for i in {129..132} > do > ssh-copy-id web$i > done

安裝LVS+Keepalived

主lvs_master：192.168.19.129 備lvs_backup：192.168.19.130http(RS1):192.168.19.131 http(RS2):192.168.19.132虛IP：192.168.19.150virtual_ipaddress {192.168.19.150} }virtual_server 192.168.19.150 80 {如上安裝好ansible之后便于安裝配置： [root@localhost ~]# cat /etc/ansible/hosts ## [webservers] ## alpha.example.org ## beta.example.org ## 192.168.1.100 ## 192.168.1.110 [webservers] web129.yanglt.com web130.yanglt.com web131.yanglt.com web132.yanglt.com [master] web129.yanglt.com web130.yanglt.com [web] web131.yanglt.com web132.yanglt.com

Master 安裝keepalived+latest：
[root@localhost ~]# ansible master -m yum -a 'name=keepalived state=latest'
[root@localhost ~]# ansible master -m yum -a 'name=ipvsadm state=latest'
[root@web129 ~]#ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP localhost.localdomain:http rr
-> web131.yanglt.com:http Route 1 0 7
-> web132.yanglt.com:http Route 1 0 0
[root@web129 ~]# lsmod|grep ip_vs #檢查當(dāng)前加載的內(nèi)核模塊，看是否存在 ip_vs 模塊，只有執(zhí)行 ipvsadm 以后，才會(huì)在內(nèi)核加載 ip_vs 模塊

LVS的ip負(fù)載均衡技術(shù)就是通過IPVS模塊來實(shí)現(xiàn)的
ip_vs_rr 12600 1
ip_vs 141092 3 ip_vs_rr
nf_conntrack 111302 1 ip_vs
libcrc32c 12644 2 xfs,ip_vs
[root@web129 ~]#

Slaver：

[root@localhost ~]# ansible master -m yum -a 'name=keepalived state=latest'
[root@localhost ~]# ansible master -m yum -a 'name=ipvsadm state=latest'
[root@web129 ~]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP localhost.localdomain:http rr
-> web131.yanglt.com:http Route 1 0 7
-> web132.yanglt.com:http Route 1 0 0
[root@web129 ~]# lsmod|grep ip_vs
ip_vs_rr 12600 1
ip_vs 141092 3 ip_vs_rr
nf_conntrack 111302 1 ip_vs
libcrc32c 12644 2 xfs,ip_vs
[root@web129 ~]#

MASTER：配置如下 [root@web129 ~]# cat /etc/keepalived/keepalived.conf ! Configuration File for keepalivedglobal_defs {notification_email {acassen@firewall.locfailover@firewall.locsysadmin@firewall.loc}notification_email_from Alexandre.Cassen@firewall.locsmtp_server 127.0.0.1smtp_connect_timeout 30router_id LVS_DEVEL }vrrp_instance VI_1 {state MASTERinterface ens33virtual_router_id 51priority 100advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.19.200} } virtual_server 192.168.19.200 80 {delay_loop 6lb_algo rr lb_kind DRnat_mask 255.255.255.0 persistence_timeout 0protocol TCPreal_server 192.168.19.131 80 {weight 1HTTP_GET {url { path /status_code 200}connect_timeout 3nb_get_retry 3delay_before_retry 3}}real_server 192.168.19.132 80 {weight 1HTTP_GET {url { path /status_code 200}connect_timeout 3nb_get_retry 3delay_before_retry 3}} } [root@web129 ~]# slave配置如下： [root@web130 ~]# cat /etc/keepalived/keepalived.conf ! Configuration File for keepalivedglobal_defs {notification_email {acassen@firewall.locfailover@firewall.locsysadmin@firewall.loc}notification_email_from Alexandre.Cassen@firewall.locsmtp_server 127.0.0.1smtp_connect_timeout 30router_id LVS_DEVEL }vrrp_instance VI_1 {state BACKUPinterface ens33virtual_router_id 51priority 50advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.19.200} } virtual_server 192.168.19.200 80 {delay_loop 6lb_algo rr lb_kind DRnat_mask 255.255.0.0 persistence_timeout 50protocol TCPreal_server 192.168.19.131 80 {weight 1HTTP_GET {url { path /status_code 200}connect_timeout 3nb_get_retry 3delay_before_retry 3}}real_server 192.168.19.132 80 {weight 1HTTP_GET {url { path /status_code 200}connect_timeout 3nb_get_retry 3delay_before_retry 3}} } [root@web130 ~]# 兩臺RS服務(wù)器上執(zhí)行如下腳本， 兩臺RS上為lo:0綁定VIP地址、抑制ARP廣播： [root@web131 ~]# cat lvs_client.sh #!/bin/bash #description : start realserver VIP=192.168.19.200 . /etc/rc.d/init.d/functions case "$1" in start) echo " start LVS of REALServer" /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up 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 ;; stop) /sbin/ifconfig lo:0 down echo "close LVS Directorserver" 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 "Usage: $0 {start|stop}" exit 1 esac [root@web131 ~]# 重啟keepalived： [root@web129 ~]# systemctl restart keepalived.service 看到有如下進(jìn)程即可： [root@web129 ~]# ps aux | grep keepalived root 2391 0.0 0.1 118080 1368 ? Ss 23:03 0:00 /usr/sbin/keepalived -D root 2392 0.0 0.3 120324 3044 ? S 23:03 0:00 /usr/sbin/keepalived -D root 2393 0.0 0.2 120204 2352 ? S 23:03 0:00 /usr/sbin/keepalived -D root 2411 0.0 0.0 112664 976 pts/0 S+ 23:17 0:00 grep --color=auto keepalived [root@web129 ~]# [root@web129 ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000link/ether 00:0c:29:82:86:6c brd ff:ff:ff:ff:ff:ffinet 192.168.19.129/24 brd 192.168.19.255 scope global ens33valid_lft forever preferred_lft foreverinet 192.168.19.200/32 scope global ens33valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:fe82:866c/64 scope link valid_lft forever preferred_lft forever [root@web129 ~]#

做端口轉(zhuǎn)發(fā)：未測試
[root@web129 ~]# echo "1">/proc/sys/net/ipv4/ip_forward
[root@web130 ~]# echo "1">/proc/sys/net/ipv4/ip_forward

參考資料： $ vi /etc/keepalived/keepalived.conf配置信息如下! Configuration File for keepalivedglobal_defs {notification_email {acassen@firewall.loc #設(shè)置報(bào)警郵件地址，可以設(shè)置多個(gè)，每行一個(gè)。failover@firewall.loc #需開啟本機(jī)的sendmail服務(wù)sysadmin@firewall.loc}notification_email_from Alexandre.Cassen@firewall.loc #設(shè)置郵件的發(fā)送地址smtp_server 127.0.0.1 #設(shè)置smtp server地址smtp_connect_timeout 30 #設(shè)置連接smtp server的超時(shí)時(shí)間router_id LVS_DEVEL #表示運(yùn)行keepalived服務(wù)器的一個(gè)標(biāo)識。發(fā)郵件時(shí)顯示在郵件主題的信息 }vrrp_instance VI_1 {state MASTER #指定keepalived的角色，MASTER表示此主機(jī)是主服務(wù)器，BACKUP表示此主機(jī)是備用服務(wù)器interface enp0s3 #指定HA監(jiān)測網(wǎng)絡(luò)的接口virtual_router_id 51 #虛擬路由標(biāo)識，這個(gè)標(biāo)識是一個(gè)數(shù)字，同一個(gè)vrrp實(shí)例使用唯一的標(biāo)識。即同一vrrp_instance下，MASTER和BACKUP必須是一致的priority 100 #定義優(yōu)先級，數(shù)字越大，優(yōu)先級越高，在同一個(gè)vrrp_instance下，MASTER的優(yōu)先級必須大于BACKUP的優(yōu)先級advert_int 1 #設(shè)定MASTER與BACKUP負(fù)載均衡器之間同步檢查的時(shí)間間隔，單位是秒authentication { #設(shè)置驗(yàn)證類型和密碼auth_type PASS #設(shè)置驗(yàn)證類型，主要有PASS和AH兩種auth_pass 1111 #設(shè)置驗(yàn)證密碼，在同一個(gè)vrrp_instance下，MASTER與BACKUP必須使用相同的密碼才能正常通信}virtual_ipaddress { #設(shè)置虛擬IP地址，可以設(shè)置多個(gè)虛擬IP地址，每行一個(gè)192.168.137.100 } }virtual_server 192.168.137.100 80 { #設(shè)置虛擬服務(wù)器，需要指定虛擬IP地址和服務(wù)端口，IP與端口之間用空格隔開delay_loop 6 #設(shè)置運(yùn)行情況檢查時(shí)間，單位是秒lb_algo rr #設(shè)置負(fù)載調(diào)度算法，這里設(shè)置為rr，即輪詢算法lb_kind DR #設(shè)置LVS實(shí)現(xiàn)負(fù)載均衡的機(jī)制，有NAT、TUN、DR三個(gè)模式可選nat_mask 255.255.255.0 persistence_timeout 0 #會(huì)話保持時(shí)間，單位是秒。這個(gè)選項(xiàng)對動(dòng)態(tài)網(wǎng)頁是非常有用的，為集群系統(tǒng)中的session共享提供了一個(gè)很好的解決方案。#有了這個(gè)會(huì)話保持功能，用戶的請求會(huì)被一直分發(fā)到某個(gè)服務(wù)節(jié)點(diǎn)，直到超過這個(gè)會(huì)話的保持時(shí)間。#需要注意的是，這個(gè)會(huì)話保持時(shí)間是最大無響應(yīng)超時(shí)時(shí)間，也就是說，用戶在操作動(dòng)態(tài)頁面時(shí)，如果50秒內(nèi)沒有執(zhí)行任何操作#那么接下來的操作會(huì)被分發(fā)到另外的節(jié)點(diǎn)，但是如果用戶一直在操作動(dòng)態(tài)頁面，則不受50秒的時(shí)間限制protocol TCP #指定轉(zhuǎn)發(fā)協(xié)議類型，有TCP和UDP兩種real_server 192.168.137.5 80 { #配置服務(wù)節(jié)點(diǎn)1，需要指定real server的真實(shí)IP地址和端口，IP與端口之間用空格隔開weight 1 #配置服務(wù)節(jié)點(diǎn)的權(quán)值，權(quán)值大小用數(shù)字表示，數(shù)字越大，權(quán)值越高，設(shè)置權(quán)值大小可以為不同性能的服務(wù)器#分配不同的負(fù)載，可以為性能高的服務(wù)器設(shè)置較高的權(quán)值，而為性能較低的服務(wù)器設(shè)置相對較低的權(quán)值，這樣才能合理地利用和分配系統(tǒng)資源TCP_CHECK { #realserver的狀態(tài)檢測設(shè)置部分，單位是秒connect_timeout 3 #表示3秒無響應(yīng)超時(shí)nb_get_retry 3 #表示重試次數(shù)delay_before_retry 3 #表示重試間隔connect_port 80} }real_server 192.168.137.6 80 {weight 1TCP_CHECK {connect_timeout 3nb_get_retry 3delay_before_retry 3connect_port 80}} }

測試Lvs+Keepalived

測試： [root@localhost ~]# curl 192.168.19.200 this is server1 [root@localhost ~]# curl 192.168.19.200 this is server2 [root@localhost ~]# curl 192.168.19.200 this is server1 [root@localhost ~]# curl 192.168.19.200 this is server2 [root@localhost ~]# 停掉RS2的httpd服務(wù)： [root@localhost ~]# curl 192.168.19.200 this is server1 [root@localhost ~]# curl 192.168.19.200 curl: (7) Failed connect to 192.168.19.200:80; 拒絕連接 [root@localhost ~]# curl 192.168.19.200 this is server1 [root@localhost ~]# curl 192.168.19.200 this is server1 [root@localhost ~]# curl 192.168.19.200

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轉(zhuǎn)載于:https://www.cnblogs.com/yangleitao/p/9434263.html

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