vrrp_script<\/span><\/p>\n\u544a\u8bc9 keepalived \u5728\u4ec0\u4e48\u60c5\u51b5\u4e0b\u5207\u6362\uff0c\u6240\u4ee5\u5c24\u4e3a\u91cd\u8981\u3002\u53ef\u4ee5\u6709\u591a\u4e2a vrrp_script\u3002<\/p>\n
script \uff1a \u81ea\u5df1\u5199\u7684\u68c0\u6d4b\u811a\u672c\u3002\u4e5f\u53ef\u4ee5\u662f\u4e00\u884c\u547d\u4ee4\u5982 killall -0 nginx\u3002<\/p>\n
interval 2 \uff1a \u6bcf 2s \u68c0\u6d4b\u4e00\u6b21\u3002<\/p>\n
weight -5 \uff1a \u68c0\u6d4b\u5931\u8d25\uff08\u811a\u672c\u8fd4\u56de\u975e0\uff09\u5219\u4f18\u5148\u7ea7 -5\u3002<\/p>\n
fall 2 \uff1a \u68c0\u6d4b\u8fde\u7eed 2 \u6b21\u5931\u8d25\u624d\u7b97\u786e\u5b9a\u662f\u771f\u5931\u8d25\u3002\u4f1a\u7528 weight \u51cf\u5c11\u4f18\u5148\u7ea7\uff081-255\u4e4b\u95f4\uff09\u3002<\/p>\n
rise 1 \uff1a \u68c0\u6d4b 1 \u6b21\u6210\u529f\u5c31\u7b97\u6210\u529f\u3002\u4f46\u4e0d\u4fee\u6539\u4f18\u5148\u7ea7\u3002<\/p>\n
\u8fd9\u91cc\u8981\u63d0\u793a\u4e00\u4e0b script \u4e00\u822c\u6709 2 \u79cd\u5199\u6cd5\uff1a<\/p>\n
1\uff09\u901a\u8fc7\u811a\u672c\u6267\u884c\u7684\u8fd4\u56de\u7ed3\u679c\uff0c\u6539\u53d8\u4f18\u5148\u7ea7\uff0ckeepalived \u7ee7\u7eed\u53d1\u9001\u901a\u544a\u6d88\u606f\uff0cbackup \u6bd4\u8f83\u4f18\u5148\u7ea7\u518d\u51b3\u5b9a\uff1b<\/p>\n
2\uff09\u811a\u672c\u91cc\u9762\u68c0\u6d4b\u5230\u5f02\u5e38\uff0c\u76f4\u63a5\u5173\u95edkeepalived\u8fdb\u7a0b\uff0cbackup \u673a\u5668\u63a5\u6536\u4e0d\u5230 advertisement \u4f1a\u62a2\u5360 IP\u3002<\/p>\n
\u4e0a\u6587 vrrp_script \u914d\u7f6e\u90e8\u5206\uff0ckillall -0 nginx \u5c5e\u4e8e\u7b2c 1 \u79cd\u60c5\u51b5\uff0c\/etc\/keepalived\/check_nginx.sh \u5c5e\u4e8e\u7b2c 2 \u79cd\u60c5\u51b5\uff08\u811a\u672c\u4e2d\u5173\u95ed keepalived\uff09\u3002\u4e2a\u4eba\u66f4\u503e\u5411\u4e8e\u901a\u8fc7 shell \u811a\u672c\u5224\u65ad\uff0c\u4f46\u6709\u5f02\u5e38\u65f6 exit 1\uff0c\u6b63\u5e38\u9000\u51fa exit 0\uff0c\u7136\u540e keepalived\u6839\u636e\u52a8\u6001\u8c03\u6574\u7684 vrrp_instance \u4f18\u5148\u7ea7\u9009\u4e3e\u51b3\u5b9a\u662f\u5426\u62a2\u5360VIP\uff1a<\/p>\n
1\uff09\u5982\u679c\u811a\u672c\u6267\u884c\u7ed3\u679c\u4e3a 0\uff0c\u5e76\u4e14 weight \u914d\u7f6e\u7684\u503c\u5927\u4e8e 0\uff0c\u5219\u4f18\u5148\u7ea7\u76f8\u5e94\u7684\u589e\u52a0\uff1b<\/p>\n
2\uff09\u5982\u679c\u811a\u672c\u6267\u884c\u7ed3\u679c\u975e 0\uff0c\u5e76\u4e14 weight \u914d\u7f6e\u7684\u503c\u5c0f\u4e8e 0\uff0c\u5219\u4f18\u5148\u7ea7\u76f8\u5e94\u7684\u51cf\u5c11\uff1b<\/p>\n
3\uff09\u5176\u4ed6\u60c5\u51b5\uff0c\u539f\u672c\u914d\u7f6e\u7684\u4f18\u5148\u7ea7\u4e0d\u53d8\uff0c\u5373\u914d\u7f6e\u6587\u4ef6\u4e2d priority \u5bf9\u5e94\u7684\u503c\u3002<\/p>\n
\u63d0\u793a\uff1a<\/p>\n
1\uff09\u4f18\u5148\u7ea7\u4e0d\u4f1a\u4e0d\u65ad\u7684\u63d0\u9ad8\u6216\u8005\u964d\u4f4e\uff1b<\/p>\n
2\uff09\u53ef\u4ee5\u7f16\u5199\u591a\u4e2a\u68c0\u6d4b\u811a\u672c\u5e76\u4e3a\u6bcf\u4e2a\u68c0\u6d4b\u811a\u672c\u8bbe\u7f6e\u4e0d\u540c\u7684 weight\uff08\u5728\u914d\u7f6e\u4e2d\u5217\u51fa\u5c31\u884c\uff09\uff1b<\/p>\n
3\uff09\u4e0d\u7ba1\u63d0\u9ad8\u4f18\u5148\u7ea7\u8fd8\u662f\u964d\u4f4e\u4f18\u5148\u7ea7\uff0c\u6700\u7ec8\u4f18\u5148\u7ea7\u7684\u8303\u56f4\u662f\u5728[1,254]\uff0c\u4e0d\u4f1a\u51fa\u73b0\u4f18\u5148\u7ea7\u5c0f\u4e8e\u7b49\u4e8e 0 \u6216\u8005\u4f18\u5148\u7ea7\u5927\u4e8e\u7b49\u4e8e 255\u7684\u60c5\u51b5\uff1b<\/p>\n
4\uff09\u5728 MASTER \u8282\u70b9\u7684 vrrp_instance \u4e2d\u914d\u7f6e nopreempt \uff0c\u5f53\u5b83\u5f02\u5e38\u6062\u590d\u540e\uff0c\u5373\u4f7f\u5b83 prio \u66f4\u9ad8\u4e5f\u4e0d\u4f1a\u62a2\u5360\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u6b63\u5e38\u60c5\u51b5\u4e0b\u505a\u65e0\u8c13\u7684\u5207\u6362\uff1b<\/p>\n
\u4ee5\u4e0a\u53ef\u4ee5\u505a\u5230\u5229\u7528\u811a\u672c\u68c0\u6d4b\u4e1a\u52a1\u8fdb\u7a0b\u7684\u72b6\u6001\uff0c\u5e76\u52a8\u6001\u8c03\u6574\u4f18\u5148\u7ea7\u4ece\u800c\u5b9e\u73b0\u4e3b\u5907\u5207\u6362\u3002<\/p>\n
\u914d\u7f6e\u7ed3\u675f<\/strong><\/p>\n\u5728\u9ed8\u8ba4\u7684 keepalive.conf \u91cc\u9762\u8fd8\u6709 virtual_server,real_server \u8fd9\u6837\u7684\u914d\u7f6e\uff0c\u8fd9\u91cc\u7528\u4e0d\u5230\uff0c\u5b83\u662f\u4e3a lvs \u51c6\u5907\u7684\u3002 notify \u53ef\u4ee5\u5b9a\u4e49\u5728\u5207\u6362\u6210 MASTER \u6216 BACKUP \u65f6\u6267\u884c\u7684\u811a\u672c\uff0c\u5982\u6709\u9700\u6c42\u8bf7\u81ea\u884c\u914d\u7f6e\u3002<\/p>\n
3.3 Nginx \u914d\u7f6e<\/h4>\n
\u5f53\u7136 nginx \u6ca1\u6709\u4ec0\u4e48\u53ef\u914d\u7f6e\u7684\uff0c\u56e0\u4e3a\u5b83\u4e0e keepalived \u5e76\u6ca1\u6709\u8054\u7cfb\u3002\u4f46\u8bb0\u4f4f\uff0c2 \u53f0 nginx \u670d\u52a1\u5668\u4e0a\u7684\u914d\u7f6e\u5e94\u8be5\u662f\u5b8c\u5168\u4e00\u6837\u7684\uff08rsync\u540c\u6b65\uff09\uff0c\u8fd9\u6837\u624d\u80fd\u505a\u5230\u5bf9\u7528\u6237\u900f\u660e\uff0cnginx.conf \u91cc\u9762\u7684\u00a0server_name\u00a0\u00a0\u5c3d\u91cf\u4f7f\u7528\u57df\u540d\u6765\u4ee3\u66ff\uff0c\u7136\u540edns\u89e3\u6790\u8fd9\u4e2a\u57df\u540d\u5230\u865a\u62df IP 192.168.220.60\u3002<\/p>\n
4 \u6d4b\u8bd5<\/h3>\n4.1 \u67e5\u770b\u7f51\u7edc<\/h4>\n
\u5728\u4e24\u53f0\u673a\u5668\u4e0a\u8f93\u5165\u547d\u4ee4\u00a0ip a |grep eth0\uff0c\u5219\u770b\u5230\u5982\u4e0b\u7ed3\u679c\uff1a<\/p>\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<\/pre>\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
4.2 \u505c\u6389 Keepalived MASTER<\/h4>\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\u00a0192.168.220.60\uff0c\u6b63\u5e38\u4e14\u8d70\u7684\u662f 58 \u673a\u5668\u4e0a\u7684 nginx\u3002<\/p>\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
4.3 \u505c\u6389 MASTER \u673a\u5668\u4e0a\u7684 Nginx<\/h4>\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\u00a0Nginx + KeepAlived \u5982\u4f55\u914d\u7f6e HA\uff08\u9ad8\u53ef\u7528\u6027\u201d\uff08High Availab […]<\/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-3142","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\/3142","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=3142"}],"version-history":[{"count":11,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/posts\/3142\/revisions"}],"predecessor-version":[{"id":3165,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=\/wp\/v2\/posts\/3142\/revisions\/3165"}],"wp:attachment":[{"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3142"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3142"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.menglanglang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3142"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"\"](\"http:\/\/www.menglanglang.cn\/wp-content\/uploads\/2018\/09\/nginx_start.png\")
<\/a><\/p>\n