keepalived+nginx主備切換
實現高可用
keepalived：
基於vrrp（虛擬路由器冗餘協議
）來實現對web服務的高可用方案
安裝keepalived
1. ./configure --prefix=/data/program/keepalived --sysconf=/etc
2. 缺少依賴opensssl . yum install openssl-devel
3. 建立軟鏈結 ln -s /data/program/keepalived/sbin/keepalived /sbin
4. ln -s /data/program/keepalived/sbin/keepalived /sbin
5. cp /data/program/keepalived-1.3.4/keepalived/etc/init.d/keepalived /etc/init.d/
6. 新增系統服務：chkconfig --add keepalived / chkconfig keepalived on
7. 服務開關 service keepalived start|stop..
keepalived日誌檔案配置
在/etc/rsyslog.conf裡新增:local0.* /var/log/keepalived.log
重新啟動keepalived和rsyslog服務：
service rsyslog restart
service keepalived restart
tail -f /var/log/keepalived.log 檢視日誌
keepalived+nginx實現雙機熱備
開發乙個虛擬ip:192.168.130.100
配置兩台nginx：ip192.168.130.130、131
修改keepalived配置檔案
vi /etc/keepalived/keepalived.conf
master(主
) keepalived配置檔案
backup(備
) keepalived配置檔案
vrrp_script check {
script "/data/program/nginx/sbin/nginx_service.sh"
interval 2
weight -9
global_defs {
router_id lvs_devel
vrrp_instance vi_1 {
state master
inte***ce ens33
virtual_router_id 51
priority 60
advert_int 1
authentication {
auth_type pass
auth_pass 2222
virtual_ipaddress {
192.168.232.100
track_script {
check
virtual_server 192.168.232.100 80 {
delay_loop 5
lb_algo rr
lb_kind nat
persistence_timeout 51
protocol tcp
real_server 192.168.232.133 80 {
weight 1
tcp_check {
connect_timeout 2
nb_get_retry 2
delay_before_retry 2
connect_port 80
vrrp_script check {
script "/data/program/nginx/sbin/nginx_service.sh"
interval 2
weight -9
global_defs {
router_id lvs_devel
vrrp_instance vi_1 {
state backup
inte***ce ens33
virtual_router_id 51
priority 40
advert_int 1
authentication {
auth_type pass
auth_pass 2222
virtual_ipaddress {
192.168.232.100
track_script {
check
virtual_server 192.168.232.100 80 {
delay_loop 5
lb_algo rr
lb_kind nat
persistence_timeout 51
protocol tcp
real_server 192.168.232.132 80 {
weight 1
tcp_check {
connect_timeout 2
nb_get_retry 2
delay_before_retry 2
connect_port 80
配置檔案說明
1. vrrp_instance配置：
state
指定初始狀態（主、備）。
inte***ce
為網絡卡名字。
virtual_router_id
相同的為乙個組。priority為節點優先順序，主的要大於備的。
advert int
檢查間隔，預設 1秒。
auth type
為認證方式。track_script 引用指令碼。
2. virtual_server配置：
delay_loop
健康檢查間隔。lb_algo 排程演算法。 lb_kind負載均衡規則。
會話保持時間。protocol使用的協議。
3. real_server配置：
weight
預設為1,0為失效。
connect_timeout
連線超時時間。
nb_get_retry
重連次數。delay_before_retry 重連間隔時間
。connect_port健康檢查的埠的埠。
4. vrrp_script配置：interval指令碼執行間隔。
weight
指令碼優先順序。script 指令碼路徑。
5.nginx_service.sh判斷
nginx
是否宕機，若宕機，結束keepalived服務。
給指令碼許可權 chmod +x
/data/program/nginx/sbin/nginx_service.sh
指令碼內容：
#!/bin/sh
nginxpidnum=`ps-c nginx --no-header |wc -l`
keepalivedpidnum=`ps-c keepalived --no-header |wc -l`
if [$nginxpidnum -eq 0 ];then
killall keepalived
elif [$keepalivedpidnum -eq 0 ];then
service keepalived start
fi#p#分頁標題#e#
keepalived nginx主從切換
五 nginx指令碼，新建nginx check.sh指令碼放到 etc keepalived下 指令碼內容 bin bash a ps c nginx no header wc l if a eq 0 then usr local nginx sbin nginx sleep 2 if ps c ...
keepalived nginx集群部署
192.168.132.130 伺服器1 192.168.132.132 伺服器2 虛擬ip 192.168.132.131 yum install gcc c gcc是gnu的c語言編譯器,至於c 編譯器,它的名字叫做g yum install y pcre pcre devel 在nginx編譯...
keepalived nginx負載安裝
環境 centos7.6 keepalived工具可以生成虛擬浮動ip，繫結到網絡卡上。172.21.210.19 master 172.21.210.20 backup 172.21.210.30 vip 浮動ip 1 兩個節點安裝keepalived yum y install keepaliv...