{"id":4602,"date":"2022-03-27T14:09:35","date_gmt":"2022-03-27T06:09:35","guid":{"rendered":"https:\/\/egonlin.com\/?p=4602"},"modified":"2022-03-27T14:09:35","modified_gmt":"2022-03-27T06:09:35","slug":"%e7%ac%ac%e5%9b%9b%e8%8a%82%ef%bc%9a%e5%b0%8f%e7%99%bd%e5%ad%a6nginx%e4%b9%8bkeeplived%e7%9a%84%e9%ab%98%e5%8f%af%e7%94%a8","status":"publish","type":"post","link":"https:\/\/egonlin.com\/?p=4602","title":{"rendered":"\u7b2c\u56db\u8282\uff1a\u5c0f\u767d\u5b66nginx\u4e4bkeeplived\u7684\u9ad8\u53ef\u7528"},"content":{"rendered":"<p>1.\u4ec0\u4e48\u662f\u9ad8\u53ef\u7528?<\/p>\n<blockquote>\n<p>\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u90fd\u662f\u542f\u52a82\u53f0\u76f8\u540c\u7684\u4e1a\u52a1\u7cfb\u7edf\uff0c\u4e00\u53f0\u6545\u969c\uff0c\u53e6\u5916\u4e00\u53f0\u81ea\u52a8\u63a5\u7ba1<\/p>\n<\/blockquote>\n<p>2.\u9ad8\u53ef\u7528\u5b9e\u73b0\u7684\u5de5\u5177?<\/p>\n<blockquote>\n<p>\u670d\u52a1\u9ad8\u53ef\u7528\uff0ckeepalived\u8f6f\u4ef6\u5b9e\u73b0 <\/p>\n<\/blockquote>\n<p>3.keepalived\u5982\u4f55\u5b9e\u73b0\u9ad8\u53ef\u7528?<\/p>\n<blockquote>\n<p>keepalived\u57fa\u4e8eVRRP\u534f\u8bae\uff0c\u865a\u62df\u8def\u7531\u5197\u4f59\u534f\u8bae<\/p>\n<\/blockquote>\n<p>4.keepalived\u7684\u4f7f\u7528\u548c\u5b89\u88c5<\/p>\n<ul>\n<li>\u5b9e\u8df5\u73af\u5883\uff0c\u914d\u7f6e\u5b9e\u73b0\u865aIP\u8f6c\u79fb<\/li>\n<\/ul>\n<blockquote>\n<p>\u72b6\u6001              IP         \u89d2\u8272<br \/>\n\u8282\u70b91   10.0.0.5    Master<br \/>\n\u8282\u70b92   10.0.0.6    Backup<br \/>\nVIP       10.0.0.3    <\/p>\n<\/blockquote>\n<ul>\n<li>\u5b89\u88c5keepalived<\/li>\n<\/ul>\n<blockquote>\n<p>yum install keepalived -y<\/p>\n<\/blockquote>\n<ul>\n<li>\u914d\u7f6eMaster\u7684Keepalived<\/li>\n<\/ul>\n<pre><code class=\"language-python\">global_defs {                   #\u5168\u5c40\u914d\u7f6e\n    router_id lb01              #\u8868\u793a\u8eab\u4efd-&gt;\u540d\u79f0\n}\n\nvrrp_instance VI_1 {\n    state MASTER                #\u6807\u8bc6\u89d2\u8272\u72b6\u6001\n    interface eth0              #\u7f51\u5361\u7ed1\u5b9a\u63a5\u53e3\n    virtual_router_id 50        #\u865a\u62df\u8def\u7531id  \u91cd\u8981\n    priority 150                #\u4f18\u5148\u7ea7      \u91cd\u8981\n    advert_int 1                #\u76d1\u6d4b\u95f4\u9694\u65f6\u95f4\n    authentication {            #\u8ba4\u8bc1\n        auth_type PASS          #\u660e\u6587\u8ba4\u8bc1\n        auth_pass 1111          #\u660e\u6587\u5bc6\u7801\n}\n    virtual_ipaddress {         \n        10.0.0.3                #\u865a\u62df\u7684VIP\u5730\u5740\n    }\n}<\/code><\/pre>\n<ul>\n<li>\u914d\u7f6eBackup\u7684Keepalived<\/li>\n<\/ul>\n<pre><code class=\"language-python\">global_defs {\n    router_id lb02\n}\n\nvrrp_instance VI_1 {\n    state BACKUP        \n    interface eth0\n    virtual_router_id 50\n    priority 100\n    advert_int 1\n    authentication {    \n        auth_type PASS\n        auth_pass 1111\n}\n    virtual_ipaddress {\n        10.0.0.3\n    }\n}<\/code><\/pre>\n<ul>\n<li>\u5bf9\u6bd4keepalived\u7684master\u4e0ebackup\u914d\u7f6e\u7684\u533a\u522b<\/li>\n<\/ul>\n<pre><code class=\"language-python\">Keepalived\u914d\u7f6e\u533a\u522b      Master\u914d\u7f6e        Backup\u8282\u914d\u7f6e\nroute_id(\u552f\u4e00\u6807\u8bc6)       lb01            lb02\nstate(\u89d2\u8272\u72b6\u6001)          Master          Backup\npriority(\u7ade\u9009\u4f18\u5148\u7ea7)      150             100<\/code><\/pre>\n<ul>\n<li>\u914d\u7f6e\u5b8c\u6210\u4e4b\u540e\uff0c\u542f\u52a8keepalived<\/li>\n<\/ul>\n<pre><code class=\"language-python\">[root@lb01 ~]# systemctl enable  keepalived\n[root@lb01 ~]# systemctl start  keepalived<\/code><\/pre>\n<ul>\n<li>\u914d\u7f6e\u975e\u62a2\u5360\u5f0f<\/li>\n<\/ul>\n<pre><code class=\"language-python\">1\u3001\u4e24\u4e2a\u8282\u70b9\u7684state\u90fd\u5fc5\u987b\u914d\u7f6e\u4e3aBACKUP\n2\u3001\u4e24\u4e2a\u8282\u70b9\u90fd\u5fc5\u987b\u52a0\u4e0a\u914d\u7f6e nopreempt\n3\u3001\u5176\u4e2d\u4e00\u4e2a\u8282\u70b9\u7684\u4f18\u5148\u7ea7\u5fc5\u987b\u8981\u9ad8\u4e8e\u53e6\u5916\u4e00\u4e2a\u8282\u70b9\u7684\u4f18\u5148\u7ea7\n\u4e24\u53f0\u670d\u52a1\u5668\u90fd\u89d2\u8272\u72b6\u6001\u542f\u7528nopreempt\u540e\uff0c\u5fc5\u987b\u4fee\u6539\u89d2\u8272\u72b6\u6001\u7edf\u4e00\u4e3aBACKUP\uff0c\u552f\u4e00\u7684\u533a\u5206\u5c31\u662f\u4f18\u5148\u7ea7<\/code><\/pre>\n<ul>\n<li>\u5177\u4f53\u7684\u914d\u7f6e\u4ee3\u7801\uff1a<\/li>\n<\/ul>\n<pre><code class=\"language-python\">Master\n    vrrp_instance VI_1 {\n        state BACKUP\n        priority 150\n        nopreempt\n    }\n\nBackup\n    vrrp_instance VI_1 {\n        state BACKUP\n        priority 100\n        nopreempt\n    }<\/code><\/pre>\n<h5>keepalived \u7684\u4e00\u4e9b\u95ee\u9898<\/h5>\n<p>1.\u4e3b\u548c\u5907\u90fd\u914d\u7f6e\u4e00\u6837\u7684\u89d2\u8272\uff0c\u4e00\u6837\u7684\u4f18\u5148\u7ea7\uff1f\uff1f<\/p>\n<pre><code class=\"language-python\">keepalived\u865a\u62df\u5730\u5740\u6f02\u79fb\u4e0eNginx\u670d\u52a1\u8fdb\u884c\u5173\u8054\n1.Nginx\u9ed8\u8ba4\u76d1\u542c\u5728\u6240\u6709\u7684IP\u5730\u5740\u4e0a\n2.\u7528\u6237\u5c06\u57df\u540d\u89e3\u6790\u5230VIP\u4e0a\u9762\u5373\u53ef<\/code><\/pre>\n<p>2.\u7531\u4e8e\u4e0b\u9762\u7684\u539f\u56e0\uff0c\u5bfc\u81f4\u4e24\u53f0keepalived\u9ad8\u53ef\u7528\u670d\u52a1\u5668\u5728\u6307\u5b9a\u65f6\u95f4\u5185\uff0c\u65e0\u6cd5\u68c0\u6d4b\u5230\u5bf9\u65b9\u7684\u5fc3\u8df3\u6d88\u606f\uff0c\u5404\u81ea\u53d6\u5f97\u8d44\u6e90\u53ca\u670d\u52a1\u7684\u6240\u6709\u6743\uff0c\u800c\u6b64\u65f6\u7684\u4e24\u53f0\u9ad8\u53ef\u7528\u670d\u52a1\u5668\u53c8\u90fd\u8fd8\u6d3b\u7740\u3002<\/p>\n<ul>\n<li>\u670d\u52a1\u5668\u7f51\u7ebf\u677e\u52a8\u7b49\u7f51\u7edc\u6545\u969c<\/li>\n<li>\u670d\u52a1\u5668\u786c\u4ef6\u6545\u969c\u53d1\u751f\u635f\u574f\u73b0\u8c61\u800c\u5d29\u6e83<\/li>\n<li>\u4e3b\u5907\u90fd\u5f00\u542ffirewalld\u9632\u706b\u5899<\/li>\n<\/ul>\n<p><strong>\u6b64\u65f6\u5c31\u53d1\u53d1\u751f\u8111\u88c2\uff0c\u5982\u679c\u53d1\u751f\u8111\u88c2\uff0c\u5219\u968f\u673akill\u6389\u4e00\u53f0\u5373\u53ef\u3002<\/strong><\/p>\n<p>\u6211\u4eec\u63a5\u4e0b\u6765\uff0c\u53ef\u4ee5\u5728\u5907\u4e0a\u7f16\u5199\u68c0\u6d4b\u811a\u672c, \u6d4b\u8bd5\u5982\u679c\u80fdping\u901a\u4e3b\u5e76\u4e14\u5907\u8282\u70b9\u8fd8\u6709VIP\u7684\u8bdd\u5219\u8ba4\u4e3a\u4ea7\u751f\u4e86\u5217\u8111<\/p>\n<pre><code class=\"language-python\">[root@lb02 ~]# cat check_split_brain.sh\n#!\/bin\/sh\nlb01_vip=10.0.0.3\nlb01_ip=10.0.0.5\nwhile true;do\n    ping -c 2 -W 3 $lb01_ip &amp;&gt;\/dev\/null\n    if [ $? -eq 0 -a `ip add|grep &quot;$lb01_vip&quot;|wc -l` -eq 1 ];then\n        echo &quot;ha is split brain.warning.&quot;\n    else\n        echo &quot;ha is ok&quot;\n    fi\nsleep 5\ndone<\/code><\/pre>\n<p>3.\u5982\u679cNginx\u670d\u52a1\u6b7b\u6389\uff0c\u4f1a\u51fa\u73b0\u5565\u539f\u56e0\uff1f<\/p>\n<pre><code class=\"language-python\">1.\u4f1a\u5bfc\u81f4\u7528\u6237\u65e0\u6cd5\u6b63\u5e38\u7684\u8bbf\u95ee\u5230\u7f51\u7ad9\u3002\n2.\u8be5\u670d\u52a1\u5668\u7684VIp\u4e5f\u4e0d\u4f1a\u8fdb\u884c\u6f02\u79fb(\u56e0\u4e3akeepalived\u4e0enginx\u662f\u4e24\u4e2a\u4e0d\u540c\u7684\u8f6f\u4ef6)\n<\/code><\/pre>\n<p>\u89e3\u51b3\u624b\u6bb5\uff1a<\/p>\n<blockquote>\n<p>\u5199\u4e2a\u76d1\u63a7\u811a\u672c\uff0c\u5982\u679cnginx\u505c\u6b62\u8fd0\u884c\uff0c\u5219\u5c1d\u8bd5\u542f\u52a8\uff0c\u5982\u679c\u5c1d\u8bd5\u5931\u8d25\uff0c\u5219\u505c\u6b62keepalived<\/p>\n<\/blockquote>\n<pre><code class=\"language-python\">[root@lb01 ~]# mkdir \/server\/scripts\n[root@lb01 ~]# vim \/server\/scripts\/check_web.sh\n\n#!\/bin\/sh\nnginxpid=$(ps -C nginx --no-header|wc -l)\n\n#\u5224\u65adNginx\u662f\u5426\u5b58\u6d3b,\u5982\u679c\u4e0d\u5b58\u6d3b\u5219\u5c1d\u8bd5\u542f\u52a8Nginx\nif [ $nginxpid -eq 0 ];then\n    systemctl start nginx\n    sleep 3\n    #2.\u7b49\u5f853\u79d2\u540e\u518d\u6b21\u83b7\u53d6\u4e00\u6b21Nginx\u72b6\u6001\n    nginxpid=$(ps -C nginx --no-header|wc -l) \n    #3.\u518d\u6b21\u8fdb\u884c\u5224\u65ad, \u5982Nginx\u8fd8\u4e0d\u5b58\u6d3b\u5219\u505c\u6b62Keepalived,\u8ba9\u5730\u5740\u8fdb\u884c\u6f02\u79fb,\u5e76\u9000\u51fa\u811a\u672c  \n    if [ $nginxpid -eq 0 ];then\n        systemctl stop keepalived\n   fi\nfi\n\n#\u7ed9\u811a\u672c\u589e\u52a0\u6267\u884c\u6743\u9650\n[root@lb01 ~]# chmod +x \/server\/scripts\/check_web.sh\n<\/code><\/pre>\n<p>\u6ce8\u610f\uff0c\u4e0a\u8ff0\u7684\u811a\u672c\uff0c\u6211\u4eec\u9700\u8981\u5728keepalived\u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\uff0c \u8fdb\u884c\u914d\u7f6e\uff0c\u624d\u80fd\u5b9a\u65f6\u6267\u884c<\/p>\n<pre><code class=\"language-python\">[root@lb01 ~]# cat \/etc\/keepalived\/keepalived.conf\nglobal_defs {\n    router_id LVS_01\n}\n\n#1.\u6bcf5\u79d2\u6267\u884c\u4e00\u6b21\u811a\u672c, \u811a\u672c\u6267\u884c\u5185\u5bb9\u4e0d\u80fd\u8d85\u8fc75\u79d2,\u5426\u5219\u4f1a\u88ab\u4e2d\u65ad\u518d\u6b21\u91cd\u65b0\u8fd0\u884c\u811a\u672c\nvrrp_script check_web {\n   script &quot;\/server\/scripts\/check_web.sh&quot;\n   interval 5\n}\n\nvrrp_instance VI_1 {\n    nopreempt\n    state MASTER\n    interface eth0\n    virtual_router_id 50\n    priority 150\n    advert_int 1\n    authentication {\n        auth_type PASS\n        auth_pass 1111\n    }\n    virtual_ipaddress {\n        10.0.0.3\n    }\n\n    #2.\u8c03\u7528\u5e76\u8fd0\u884c\u8be5\u811a\u672c\n    track_script {\n        check_web\n    }\n}\n<\/code><\/pre>\n<p>\u6ce8\u610f\uff1a\u516c\u6709\u4e91\u4e0d\u652f\u6301keepalived\uff0c \u4e00\u822c\u90fd\u662f\u94f6\u884c\u3001\u91d1\u878d\u3001\u8bc1\u5238\u3001\u56fd\u4f01\u624d\u4f1a\u4f7f\u7528<\/p>\n<p>\u200b   <\/p>\n","protected":false},"excerpt":{"rendered":"<p>1.\u4ec0\u4e48\u662f\u9ad8\u53ef\u7528? \u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u90fd\u662f\u542f\u52a82\u53f0\u76f8\u540c\u7684\u4e1a\u52a1\u7cfb\u7edf\uff0c\u4e00\u53f0\u6545\u969c\uff0c\u53e6\u5916\u4e00\u53f0\u81ea\u52a8\u63a5\u7ba1 2.\u9ad8\u53ef\u7528\u5b9e\u73b0\u7684\u5de5\u5177? [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[352,351],"tags":[],"_links":{"self":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/4602"}],"collection":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4602"}],"version-history":[{"count":0,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/4602\/revisions"}],"wp:attachment":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4602"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4602"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4602"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}