{"id":3253,"date":"2018-09-08T10:09:09","date_gmt":"2018-09-08T02:09:09","guid":{"rendered":"http:\/\/www.menglanglang.cn\/?p=3253"},"modified":"2022-09-16T05:53:06","modified_gmt":"2022-09-15T21:53:06","slug":"nginx-keepalived-%e5%ae%9e%e7%8e%b0%e6%9c%8d%e5%8a%a1%e9%ab%98%e5%8f%af%e7%94%a8","status":"publish","type":"post","link":"http:\/\/www.menglanglang.cn\/?p=3253","title":{"rendered":"Nginx + Keepalived \u5b9e\u73b0\u670d\u52a1\u9ad8\u53ef\u7528"},"content":{"rendered":"\n

\u8fd9\u4e00\u7bc7\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e0b Nginx + KeepAlived \u5982\u4f55\u914d\u7f6e HA\uff08\u9ad8\u53ef\u7528\u6027\u201d\uff08High Availability\uff09\u901a\u5e38\u6765\u63cf\u8ff0\u4e00\u4e2a\u7cfb\u7edf\u7ecf\u8fc7\u4e13\u95e8\u7684\u8bbe\u8ba1\uff0c\u4ece\u800c\u51cf\u5c11\u505c\u5de5\u65f6\u95f4\uff0c\u800c\u4fdd\u6301\u5176\u670d\u52a1\u7684\u9ad8\u5ea6\u53ef\u7528\u6027\uff09\u3002<\/p>\n\n\n\n

\u5728\u9879\u76ee\u90e8\u7f72\u8fc7\u7a0b\u4e2d\uff0c\u4ee3\u7406\u670d\u52a1\u5668 Nginx \u8981\u505a\u5230\u7ebf\u4e0a\u9ad8\u53ef\u7528\uff0c\u907f\u514d\u51fa\u73b0\u5355\u70b9\u6545\u969c\uff0c\u56e0\u6b64\u9700\u8981\u81f3\u5c11 2 \u53f0\u670d\u52a1\u5668\u624d\u884c\u3002\u6240\u4ee5\u8ba1\u5212\u4f7f\u7528 2 \u53f0 nginx \u4ee3\u7406\u670d\u52a1\u5668\uff0c\u901a\u8fc7 Keepalived \u6765\u5b9e\u73b0 nginx \u7684 HA\uff0c\u5b9e\u73b0\u4e00\u53f0 nginx \u4ee3\u7406\u670d\u52a1\u5668\u5b95\u673a\uff0c\u53e6\u4e00\u53f0\u5907\u673a\u81ea\u52a8\u63a5\u7ba1\u670d\u52a1\u7684\u6548\u679c\u3002\u5728\u8fd9\u91cc nginx \u505a\u53cd\u5411\u4ee3\u7406\uff0c\u5b9e\u73b0\u540e\u7aef\u5e94\u7528\u670d\u52a1\u5668\uff08\u5982 Tomcat \u7b49\uff09\u7684\u8d1f\u8f7d\u5747\u8861\u3002<\/p>\n\n\n\n

1 KeepAlived\u4ecb\u7ecd<\/h1>\n\n\n\n

Keepalived \u662f\u4e00\u4e2a\u57fa\u4e8e VRRP \u534f\u8bae\u6765\u5b9e\u73b0\u7684\u670d\u52a1\u9ad8\u53ef\u7528\u65b9\u6848\uff0c\u53ef\u4ee5\u5229\u7528\u5176\u6765\u907f\u514d IP \u5355\u70b9\u6545\u969c\uff0c\u7c7b\u4f3c\u7684\u5de5\u5177\u8fd8\u6709 heartbeat\u3001corosync\u3001pacemaker\u3002\u4f46\u662f\u5b83\u4e00\u822c\u4e0d\u4f1a\u5355\u72ec\u51fa\u73b0\uff0c\u800c\u662f\u4e0e\u5176\u5b83\u8d1f\u8f7d\u5747\u8861\u6280\u672f\uff08\u5982lvs\u3001haproxy\u3001nginx\uff09\u4e00\u8d77\u5de5\u4f5c\u6765\u8fbe\u5230\u96c6\u7fa4\u7684\u9ad8\u53ef\u7528\u3002<\/p>\n\n\n\n

2. \u5b89\u88c5\u8f6f\u4ef6<\/h1>\n\n\n\n

2.1 \u6d4b\u8bd5\u73af\u5883<\/h3>\n\n\n\n

\u4ee3\u7406\u673a\u5668 2 \u53f0\uff1aCentOS release 6.9 (Final)  2.6.32-696.el6.x86_64<\/p>\n\n\n\n

\u673a\u5668 IP\uff1a192.168.220.58\uff08web58\uff0c\u505aBACKUP\uff09\u3001192.168.220.59\uff08web59\uff0c\u505aMASTER\uff09<\/p>\n\n\n\n

\u865a\u62df IP\uff1a192.168.220.60<\/p>\n\n\n\n

2.2 \u5b89\u88c5 Nginx<\/h3>\n\n\n\n

\u5728 2 \u53f0\u673a\u5668\u4e0a\uff0c\u5b89\u88c5 Nginx\u3002<\/p>\n\n\n\n

\u5b89\u88c5\u547d\u4ee4\uff1a<\/strong>yum install -y nginx<\/p>\n\n\n\n

\u67e5\u770b\u5b89\u88c5\u7684 Nginx \u7248\u672c\uff1a<\/strong>nginx -v<\/p>\n\n\n\n

\u7248\u672c\u4fe1\u606f\u5982\u4e0b\uff1a<\/p>\n\n\n\n

nginx version: nginx\/1.10.2<\/p>\n\n\n\n

\u53e6\uff1a\u4e00\u4e9b\u8f6f\u4ef6\u5e38\u89c4\u914d\u7f6e\u547d\u4ee4\uff1a<\/p>\n\n\n\n

chkconfig nginx --list<\/p>\n\n\n\n

chkconfig nginx on<\/p>\n\n\n\n

service nginx status<\/p>\n\n\n\n

service nginx start<\/p>\n\n\n\n

2.3 \u6d4b\u8bd5 Nginx<\/h3>\n\n\n\n

\u5728\u6d4f\u89c8\u5668\u4e2d\uff0c\u76f4\u63a5\u8f93\u5165\u5730\u5740 http:\/\/192.168.220.58 \u548c 192.168.220.59\uff0c\u5982\u679c\u6253\u5f00\u4e3b\u9875\u9762\u6b63\u5e38\uff0c\u8bf4\u660e Nginx \u5b89\u88c5\u5e76\u542f\u52a8\u6210\u529f\u3002<\/p>\n\n\n\n

2.4 \u5b89\u88c5 Keepalived<\/h3>\n\n\n\n

\u5728 2 \u53f0\u673a\u5668\u4e0a\uff0c\u5b89\u88c5 Keepalived\u3002<\/p>\n\n\n\n

\u5b89\u88c5\u547d\u4ee4\uff1a<\/strong>yum install -y keepalived<\/p>\n\n\n\n

\u67e5\u770b\u5b89\u88c5\u7684 Keepalived \u7248\u672c\uff1a<\/strong>keepalived -v<\/p>\n\n\n\n

\u7248\u672c\u4fe1\u606f\u5982\u4e0b\uff1a<\/p>\n\n\n\n

Keepalived v1.2.13 (03\/19,2015)<\/p>\n\n\n\n

\u53e6\uff1a\u4e00\u4e9b\u8f6f\u4ef6\u5e38\u89c4\u914d\u7f6e\u547d\u4ee4\uff1a<\/p>\n\n\n\n

chkconfig keepalived --list<\/p>\n\n\n\n

chkconfig keepalived on<\/p>\n\n\n\n

service keepalived status<\/p>\n\n\n\n

service keepalived start<\/p>\n\n\n\n

3 Keepalived \u5b9e\u73b0 nginx \u9ad8\u53ef\u7528<\/h1>\n\n\n\n

3.1 nginx \u76d1\u63a7\u811a\u672c<\/h3>\n\n\n\n

\u8be5\u811a\u672c\u68c0\u6d4b ngnix \u7684\u8fd0\u884c\u72b6\u6001\uff0c\u5e76\u5728 nginx \u8fdb\u7a0b\u4e0d\u5b58\u5728\u65f6\u5c1d\u8bd5\u91cd\u65b0\u542f\u52a8 ngnix\uff0c\u5982\u679c\u542f\u52a8\u5931\u8d25\u5219\u505c\u6b62 keepalived\uff0c\u51c6\u5907\u8ba9\u5176\u5b83\u673a\u5668\u63a5\u7ba1\u3002<\/p>\n\n\n\n

\u8def\u5f84\uff1a\/etc\/keepalived\/check_nginx.sh\uff1a<\/p>\n\n\n\n

#! \/bin\/bash\ncounter=$(ps -C nginx --no-heading|wc -l)\nif [ \"${counter}\" = \"0\" ]; then\n    \/etc\/rc.d\/init.d\/nginx start\n    sleep 2\n    counter=$(ps -C nginx --no-heading|wc -l)\n    if [ \"${counter}\" = \"0\" ]; then\n        \/etc\/rc.d\/init.d\/keepalived stop\n    fi\nfi<\/code><\/pre>\n\n\n\n
3.2 keepalived.conf \u914d\u7f6e<\/h3>\n\n\n\n
! Configuration File for keepalived\n\nglobal_defs {\n   notification_email {\n     acassen@firewall.loc\n     failover@firewall.loc\n     sysadmin@firewall.loc\n   }\n   notification_email_from Alexandre.Cassen@firewall.loc\n   smtp_server 192.168.200.1\n   smtp_connect_timeout 30\n   router_id LVS_DEVEL\n}\n\nvrrp_script chk_nginx {\n#    script \"killall -0 nginx\"\n    script \"\/etc\/keepalived\/check_nginx.sh\" \n    interval 2 \n    weight -5 \n    fall 3  \n    rise 2 \n}\n\nvrrp_instance VI_1 {\n    state MASTER\n    interface eth0\n    mcast_src_ip 192.168.220.59\n    virtual_router_id 51\n    priority 101\n    advert_int 2\n    authentication {\n        auth_type PASS\n        auth_pass 1111\n    }\n    virtual_ipaddress {\n        192.168.220.60\n    }\n    track_script {\n       chk_nginx \n    }\n}<\/code><\/pre>\n\n\n\n
\u5728\u53e6\u5916\u4e00\u53f0\u4ee3\u7406\u670d\u52a1\u5668\u4e0a\uff0c\u53ea\u9700\u8981\u6539\u53d8 state MASTER -> state BACKUP\uff0cpriority 101 -> priority 100\uff0cmcast_src_ip 192.168.220.59 -> mcast_src_ip 192.168.220.58 \u5373\u53ef\u3002<\/p>\n\n\n\n
4 \u6d4b\u8bd5<\/h1>\n\n\n\n
4.1 \u67e5\u770b\u7f51\u7edc<\/h3>\n\n\n\n
\u5728\u4e24\u53f0\u673a\u5668\u4e0a\u8f93\u5165\u547d\u4ee4 ip a |grep eth0\uff0c\u5219\u770b\u5230\u5982\u4e0b\u7ed3\u679c\uff1a<\/p>\n\n\n\n
[root@web59 html]# ip a |grep eth0\n2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000\n    inet 192.168.220.59\/24 brd 192.168.220.255 scope global eth0\n    inet 192.168.220.60\/32 scope global eth0\n\n[root@web58 html]# ip a |grep eth0\n2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000\n    inet 192.168.220.58\/24 brd 192.168.220.255 scope global eth0<\/code><\/pre>\n\n\n\n
\u6d4f\u89c8\u5668\u8bbf\u95ee 192.168.220.60\uff0c\u6b63\u5e38\u4e14\u8d70\u7684\u662f 59 \u673a\u5668\u4e0a\u7684 nginx\u3002<\/p>\n\n\n\n
4.2 \u505c\u6389 Keepalived MASTER<\/h3>\n\n\n\n
\u505c\u6389 59 \u673a\u5668\u4e0a\u7684 Keepalived \u670d\u52a1\uff0c\u5c31\u76f8\u5f53\u4e8e\u673a\u5668\u76f4\u63a5\u6302\u6389\u7684\u60c5\u51b5\uff0c\u53ef\u4ee5\u770b\u5230 58 \u4f1a\u81ea\u52a8\u63a5\u7ba1 MASTER\uff0c\u8fd9\u662f\u8bbf\u95ee 192.168.220.60\uff0c\u6b63\u5e38\u4e14\u8d70\u7684\u662f 58 \u673a\u5668\u4e0a\u7684 nginx\u3002<\/p>\n\n\n\n
\u518d\u6b21\u542f\u52a8 59 \u673a\u5668\u7684 Keepalived\uff0c\u53ef\u4ee5\u770b\u5230\u865a\u62df IP \u53c8\u6f02\u79fb\u5230\u4e86 59 \u673a\u5668\u4e0a\u3002<\/p>\n\n\n\n
4.3 \u505c\u6389 MASTER \u673a\u5668\u4e0a\u7684 Nginx<\/h3>\n\n\n\n
\u5982\u679c\u505c\u6389 59 \u673a\u5668\u4e0a\u7684 Nginx\uff0c\u76f8\u5f53\u4e8e\u53ea\u662f\u4ee3\u7406\u670d\u52a1\u5668\u6302\u6389\u4e86\uff0c\u53ef\u4ee5\u770b\u5230 Keepalived \u4f1a\u81ea\u52a8\u6267\u884c\u81ea\u5b9a\u4e49\u7684\u68c0\u67e5\u811a\u672c\uff0c\u4f1a\u5c1d\u8bd5\u91cd\u542f Nginx \u670d\u52a1\uff0c\u5982\u679c\u542f\u52a8\u6210\u529f\uff0c\u5219\u865a\u62df IP \u4e0d\u4f1a\u6f02\u79fb\uff1b\u5982\u679c\u5c1d\u8bd5\u542f\u52a8\u5931\u8d25\uff0c\u5219\u865a\u62df IP \u5c06\u6f02\u79fb\u5230 58 \u673a\u5668\u4e0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u8fd9\u4e00\u7bc7\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e0b Nginx + KeepAlived \u5982\u4f55\u914d\u7f6e HA\uff08\u9ad8\u53ef\u7528\u6027\u201d\uff08High Av […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[705],"tags":[721,720,719,877,704,722,214,199,781],"class_list":["post-3253","post","type-post","status-publish","format-standard","hentry","category-it-frame","tag-ha","tag-keepalived","tag-nginx","tag-877","tag-704","tag-722","tag-214","tag-199","tag-781"],"_links":{"self":[{"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/posts\/3253","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3253"}],"version-history":[{"count":1,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/posts\/3253\/revisions"}],"predecessor-version":[{"id":3257,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/posts\/3253\/revisions\/3257"}],"wp:attachment":[{"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3253"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3253"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}