{"id":18566,"date":"2024-11-19T20:05:08","date_gmt":"2024-11-19T12:05:08","guid":{"rendered":"https:\/\/fwq.ai\/blog\/?p=18566"},"modified":"2024-11-19T20:05:08","modified_gmt":"2024-11-19T12:05:08","slug":"keepalived%e4%b9%8bvrrp_script%e6%80%bb%e7%bb%93","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/18566\/","title":{"rendered":"Keepalived\u4e4bvrrp_script\u603b\u7ed3"},"content":{"rendered":"<p>\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u5229\u7528keepalived\u505a\u70ed\u5907\uff0c\u5176\u4e2d\u4e00\u53f0\u8bbe\u7f6e\u4e3amaster\uff0c\u4e00\u53f0\u8bbe\u7f6e\u4e3abackup\u3002\u5f53master\u51fa\u73b0\u5f02\u5e38\u540e\uff0cbackup\u81ea\u52a8\u5207\u6362\u4e3amaster\u3002\u5f53backup\u6210\u4e3amaster\u540e\uff0cmaster\u6062\u590d\u6b63\u5e38\u540e\u4f1a\u518d\u6b21\u62a2\u5360\u6210\u4e3amaster\uff0c\u5bfc\u81f4\u4e0d\u5fc5\u8981\u7684\u4e3b\u5907\u5207\u6362\u3002\u56e0\u6b64\u53ef\u4ee5\u5c06\u4e24\u53f0keepalived\u521d\u59cb\u72b6\u6001\u5747\u914d\u7f6e\u4e3abackup\uff0c\u8bbe\u7f6e\u4e0d\u540c\u7684\u4f18\u5148\u7ea7\uff0c\u4f18\u5148\u7ea7\u9ad8\u7684\u8bbe\u7f6enopreempt\u89e3\u51b3\u5f02\u5e38\u6062\u590d\u540e\u518d\u6b21\u62a2\u5360\u7684\u95ee\u9898\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u7136\u800ckeepalived\u53ea\u80fd\u505a\u5230\u5bf9\u7f51\u7edc\u6545\u969c\u548ckeepalived\u672c\u8eab\u7684\u76d1\u63a7\uff0c\u5373\u5f53\u51fa\u73b0\u7f51\u7edc\u6545\u969c\u6216\u8005keepalived\u672c\u8eab\u51fa\u73b0\u95ee\u9898\u65f6\uff0c\u8fdb\u884c\u5207\u6362\u3002\u4f46\u662f\u8fd9\u4e9b\u8fd8\u4e0d\u591f\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u76d1\u63a7keepalived\u6240\u5728\u670d\u52a1\u5668\u4e0a\u7684\u5176\u4ed6\u4e1a\u52a1\u8fdb\u7a0b\uff0c\u6839\u636e\u4e1a\u52a1\u8fdb\u7a0b\u7684\u8fd0\u884c\u72b6\u6001\u51b3\u5b9a\u662f\u5426\u9700\u8981\u8fdb\u884c\u4e3b\u5907\u5207\u6362\u3002\u8fd9\u4e2a\u65f6\u5019\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u7f16\u5199\u811a\u672c\u5bf9\u4e1a\u52a1\u8fdb\u7a0b\u8fdb\u884c\u68c0\u6d4b\u76d1\u63a7\u3002<\/p>\n<p>\u4f8b\u5982\uff1a\u7f16\u5199\u4e2a\u7b80\u5355\u811a\u672c\u67e5\u770bhaproxy\u8fdb\u7a0b\u662f\u5426\u5b58\u6d3b.<\/p>\n<pre>#!\/bin\/bash\r\nCOUNT=`ps -C nginx --no-header | wc -l`\r\nif [ $COUNT -gt 0 ];then\r\n    exit 0\r\nelse\r\n    \/etc\/init.d\/keepalived stop\r\n    exit 1\r\nfi<\/pre>\n<p>\u5728keepalived\u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\u589e\u52a0\u76f8\u5e94\u914d\u7f6e\u9879<\/p>\n<pre>vrrp_script checkhaproxy\r\n{\r\n\u00a0\u00a0\u00a0 script \"\/home\/check.sh\"\r\n\u00a0\u00a0\u00a0 interval 3\r\n\u00a0\u00a0\u00a0 weight -20 #\u6b63\u8868\u793a\u6210\u529f\u65f6\u52a0\u6743\u91cd\uff0c\u8d1f\u8868\u793a\u5931\u8d25\u65f6\u51cf\u6743\u91cd\r\n}\r\nvrrp_instance test\r\n{\r\n\u00a0\u00a0\u00a0 ... \r\n\u00a0\u00a0\u00a0 track_script\r\n\u00a0\u00a0\u00a0 {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 checkhaproxy\r\n\u00a0\u00a0\u00a0 }\u00a0 \r\n\u00a0\u00a0\u00a0 ...\r\n}<\/pre>\n<p>keepalived\u4f1a\u5b9a\u65f6\u6267\u884c\u811a\u672c\u5e76\u5bf9\u811a\u672c\u6267\u884c\u7684\u7ed3\u679c\u8fdb\u884c\u5206\u6790\uff0c\u52a8\u6001\u8c03\u6574vrrp_instance\u7684\u4f18\u5148\u7ea7\u3002<\/p>\n<ul>\n<li>\u5982\u679c\u811a\u672c\u6267\u884c\u7ed3\u679c\u4e3a0\uff0c\u5e76\u4e14weight\u914d\u7f6e\u7684\u503c\u5927\u4e8e0\uff0c\u5219\u4f18\u5148\u7ea7\u76f8\u5e94\u7684\u589e\u52a0<\/li>\n<li>\u5982\u679c\u811a\u672c\u6267\u884c\u7ed3\u679c\u975e0\uff0c\u5e76\u4e14weight\u914d\u7f6e\u7684\u503c\u5c0f\u4e8e0\uff0c\u5219\u4f18\u5148\u7ea7\u76f8\u5e94\u7684\u51cf\u5c11<\/li>\n<li>\u5176\u4ed6\u60c5\u51b5\uff0c\u7ef4\u6301\u539f\u672c\u914d\u7f6e\u7684\u4f18\u5148\u7ea7\uff0c\u5373\u914d\u7f6e\u6587\u4ef6\u4e2dpriority\u5bf9\u5e94\u7684\u503c\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a<\/p>\n<ol>\n<li>\u4f18\u5148\u7ea7\u4e0d\u4f1a\u4e0d\u65ad\u7684\u63d0\u9ad8\u6216\u8005\u964d\u4f4e<\/li>\n<li>\u53ef\u4ee5\u7f16\u5199\u591a\u4e2a\u68c0\u6d4b\u811a\u672c\u5e76\u4e3a\u6bcf\u4e2a\u68c0\u6d4b\u811a\u672c\u8bbe\u7f6e\u4e0d\u540c\u7684weight<\/li>\n<li>\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\u4e8e0\u6216\u8005\u4f18\u5148\u7ea7\u5927\u4e8e\u7b49\u4e8e255\u7684\u60c5\u51b5<\/li>\n<\/ol>\n<p>\u8fd9\u6837\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<p>\u4f46\u662f\u5229\u7528\u8be5\u65b9\u5f0f\u4f1a\u5b58\u5728\u4e00\u4e2a\u95ee\u9898\uff0c\u4f8b\u5982\uff1aA,B\u4e24\u53f0keepalived<\/p>\n<p>A\u7684\u914d\u7f6e\u5927\u6982\u4e3a\uff1a<\/p>\n<pre>vrrp_script checkhaproxy\r\n{\r\n\u00a0\u00a0\u00a0 script \"\/etc\/check.sh\"\r\n\u00a0\u00a0\u00a0 interval 3\r\n\u00a0\u00a0\u00a0 weight -20\r\n}\r\nvrrp_instance test\r\n{\r\n\u00a0\u00a0\u00a0 ....\r\n\u00a0\u00a0\u00a0 state backup\r\n\u00a0\u00a0\u00a0 priority 80\r\n\u00a0\u00a0\u00a0 nopreempt\r\n\u00a0\u00a0\u00a0 track_script\r\n\u00a0\u00a0\u00a0 {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 checkhaproxy\r\n\u00a0\u00a0\u00a0 } \r\n\u00a0\u00a0\u00a0 ....\r\n}<\/pre>\n<p>B\u7684\u914d\u7f6e\u5927\u6982\u4e3a\uff1a<\/p>\n<pre>vrrp_script checkhaproxy\r\n{\r\n\u00a0\u00a0\u00a0 script \"\/etc\/check.sh\"\r\n\u00a0\u00a0\u00a0 interval 3\r\n\u00a0\u00a0\u00a0 weight -20\r\n}\r\nvrrp_instance test\r\n{\r\n\u00a0\u00a0\u00a0 ....\u00a0\u00a0\u00a0 \r\n\u00a0\u00a0\u00a0 state backup\r\n\u00a0\u00a0\u00a0 priority 70 \r\n\u00a0\u00a0\u00a0 track_script\r\n\u00a0\u00a0\u00a0 {\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 checkhaproxy\r\n\u00a0\u00a0\u00a0 }\r\n\u00a0\u00a0\u00a0 ....\r\n}<\/pre>\n<p>A,B\u540c\u65f6\u542f\u52a8\u540e\uff0c\u7531\u4e8eA\u7684\u4f18\u5148\u7ea7\u8f83\u9ad8\uff0c\u56e0\u6b64\u901a\u8fc7\u9009\u4e3e\u4f1a\u6210\u4e3amaster\u3002\u5f53A\u4e0a\u7684\u4e1a\u52a1\u8fdb\u7a0b\u51fa\u73b0\u95ee\u9898\u65f6\uff0c\u4f18\u5148\u7ea7\u4f1a\u964d\u4f4e\u523060\u3002\u6b64\u65f6B\u6536\u5230\u4f18\u5148\u7ea7\u6bd4\u81ea\u5df1\u4f4e\u7684vrrp\u5e7f\u64ad\u5305\u65f6\uff0c\u5c06\u5207\u6362\u4e3amaster\u72b6\u6001\u3002\u90a3\u4e48\u5f53B\u4e0a\u7684\u4e1a\u52a1\u51fa\u73b0\u95ee\u9898\u65f6\uff0c\u4f18\u5148\u7ea7\u964d\u4f4e\u523050\uff0c\u5c3d\u7ba1A\u7684\u4f18\u5148\u7ea7\u6bd4B\u7684\u8981\u9ad8\uff0c\u4f46\u662f\u7531\u4e8e\u8bbe\u7f6e\u4e86nopreempt\uff0cA\u4e0d\u4f1a\u518d\u62a2\u5360\u6210\u4e3amaster\u72b6\u6001\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u53ef\u4ee5\u5728\u68c0\u6d4b\u811a\u672c\u4e2d\u589e\u52a0\u6740\u6389keepalived\u8fdb\u7a0b\uff08\u6216\u8005\u505c\u7528keepalived\u670d\u52a1\uff09\u7684\u65b9\u5f0f\uff0c\u505a\u5230\u4e1a\u52a1\u8fdb\u7a0b\u51fa\u73b0\u95ee\u9898\u65f6\u5b8c\u6210\u4e3b\u5907\u5207\u6362\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u5229\u7528keepalived\u505a\u70ed\u5907\uff0c\u5176\u4e2d\u4e00\u53f0\u8bbe\u7f6e\u4e3amaster\uff0c\u4e00\u53f0\u8bbe\u7f6e\u4e3abackup\u3002\u5f53master\u51fa\u73b0\u5f02\u5e38\u540e\uff0cbackup\u81ea\u52a8\u5207\u6362\u4e3amaster\u3002\u5f53backup\u6210\u4e3amaster\u540e\uff0cmaster\u6062\u590d\u6b63\u5e38\u540e\u4f1a\u518d\u6b21\u62a2\u5360\u6210\u4e3amaster\uff0c\u5bfc\u81f4\u4e0d\u5fc5\u8981\u7684\u4e3b\u5907\u5207\u6362\u3002\u56e0\u6b64\u53ef\u4ee5\u5c06\u4e24\u53f0keepalived\u521d\u59cb\u72b6\u6001\u5747\u914d\u7f6e\u4e3abackup\uff0c\u8bbe\u7f6e\u4e0d\u540c\u7684\u4f18\u5148\u7ea7\uff0c\u4f18\u5148\u7ea7\u9ad8\u7684\u8bbe\u7f6enopreempt\u89e3\u51b3\u5f02\u5e38\u6062\u590d\u540e\u518d\u6b21\u62a2\u5360\u7684\u95ee\u9898\u3002 &nbsp; \u7136\u800ckeepalived\u53ea\u80fd\u505a\u5230\u5bf9\u7f51\u7edc\u6545\u969c\u548ckeepalived\u672c\u8eab\u7684\u76d1\u63a7\uff0c\u5373\u5f53\u51fa\u73b0\u7f51\u7edc\u6545\u969c\u6216\u8005keepalived\u672c\u8eab\u51fa\u73b0\u95ee\u9898\u65f6\uff0c\u8fdb\u884c\u5207\u6362\u3002\u4f46\u662f\u8fd9\u4e9b\u8fd8\u4e0d\u591f\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u76d1\u63a7keepalived\u6240\u5728\u670d\u52a1\u5668\u4e0a\u7684\u5176\u4ed6\u4e1a\u52a1\u8fdb\u7a0b\uff0c\u6839\u636e\u4e1a\u52a1\u8fdb\u7a0b\u7684\u8fd0\u884c\u72b6\u6001\u51b3\u5b9a\u662f\u5426\u9700\u8981\u8fdb\u884c\u4e3b\u5907\u5207\u6362\u3002\u8fd9\u4e2a\u65f6\u5019\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u7f16\u5199\u811a\u672c\u5bf9\u4e1a\u52a1\u8fdb\u7a0b\u8fdb\u884c\u68c0\u6d4b\u76d1\u63a7\u3002 \u4f8b\u5982\uff1a\u7f16\u5199\u4e2a\u7b80\u5355\u811a\u672c\u67e5\u770bhaproxy\u8fdb\u7a0b\u662f\u5426\u5b58\u6d3b. #!\/bin\/bash COUNT=`ps -C nginx &#8211;no-header | wc -l` if [ $COUNT -gt 0 ];then exit 0 else \/etc\/init.d\/keepalived stop exit 1 fi \u5728keepalived\u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\u589e\u52a0\u76f8\u5e94\u914d\u7f6e\u9879 vrrp_script checkhaproxy { \u00a0\u00a0\u00a0 script &#8220;\/home\/check.sh&#8221; \u00a0\u00a0\u00a0 interval 3 \u00a0\u00a0\u00a0 weight -20 #\u6b63\u8868\u793a\u6210\u529f\u65f6\u52a0\u6743\u91cd\uff0c\u8d1f\u8868\u793a\u5931\u8d25\u65f6\u51cf\u6743\u91cd } vrrp_instance test { \u00a0\u00a0\u00a0 &#8230; \u00a0\u00a0\u00a0 track_script \u00a0\u00a0\u00a0 { \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 checkhaproxy \u00a0\u00a0\u00a0 }\u00a0 \u00a0\u00a0\u00a0 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-18566","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/18566","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=18566"}],"version-history":[{"count":1,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/18566\/revisions"}],"predecessor-version":[{"id":18567,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/18566\/revisions\/18567"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=18566"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=18566"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=18566"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}