{"id":2817,"date":"2020-04-22T15:27:22","date_gmt":"2020-04-22T07:27:22","guid":{"rendered":"https:\/\/nj.transwarp.cn:8180\/?p=2817"},"modified":"2020-04-22T15:27:22","modified_gmt":"2020-04-22T07:27:22","slug":"hdfs%e5%9c%a8%e5%91%bd%e4%bb%a4%e8%a1%8c%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0namenode%e4%b8%bb%e4%bb%8e%e5%88%87%e6%8d%a2","status":"publish","type":"post","link":"https:\/\/kbwp.transwarp.cn\/?p=2817","title":{"rendered":"hdfs\u5728\u547d\u4ee4\u884c\u5982\u4f55\u5b9e\u73b0namenode\u4e3b\u4ece\u5207\u6362"},"content":{"rendered":"<h3>\u6982\u8981\u63cf\u8ff0<\/h3>\n<hr \/>\n<p>HDFS\u91c7\u7528namenode HA\u65b9\u6848\u4fdd\u8bc1hdfs\u7684\u9ad8\u53ef\u9760\uff0c\u59cb\u7ec8\u6709\u4e00\u4e2a namenode \u505a\u70ed\u5907\uff0c\u9632\u6b62\u5355\u70b9\u6545\u969c\u95ee\u9898\u3002HDFS\u91cd\u542f\u6216\u56e0\u5176\u4ed6\u539f\u56e0\uff0cnamenode\u53ef\u80fd\u53d1\u751f\u4e3b\u5907\u5207\u6362\uff0c\u4f46\u6709\u5916\u90e8\u5e94\u7528\u7a0b\u5e8f\u8bbf\u95ee HDFS \u662f\u901a\u8fc7 IP \u5730\u5740\u6307\u5b9a\u8bbf\u95ee\u7684\uff0c\u5982\u679cnamenode\u53d1\u751f\u4e86\u5207\u6362\u53ef\u80fd\u5bfc\u81f4\u5916\u90e8\u7a0b\u5e8f\u8bbf\u95ee hdfs \u5931\u8d25\uff0c\u8be5\u573a\u666f\u4e0b\uff0c\u9700\u8981\u624b\u52a8\u5207\u6362namenode\u3002\u672c\u6848\u4f8b\u63d0\u4f9b\u4e00\u79cd\u624b\u52a8\u5207\u6362 active namenode \u7684\u65b9\u6cd5\u3002<\/p>\n<h3>\u8be6\u7ec6\u8bf4\u660e<\/h3>\n<hr \/>\n<h4>\u786e\u8ba4namenode\u6240\u5728\u8282\u70b9<\/h4>\n<p>\u5728manager\u9875\u9762\u67e5\u770bnamenode\u6240\u5728\u8282\u70b9\uff0c\u7531\u4e0b\u56fe\u53ef\u77e5\uff0cmll01\u3001mll02\u662f\u4e24\u4e2anamenode\u6240\u5728\u8282\u70b9\u3002<br \/>\n<strong>\u9644\u5f55\uff1a\u4e5f\u53ef\u4ee5\u5728\u540e\u53f0\u6267\u884c <code>hdfs getconf -namenodes<\/code> \u67e5\u770b namenode \u6240\u5728\u8282\u70b9<\/strong><\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/04\/image-1587534047853.png\" alt=\"file\" \/><\/p>\n<h4>\u67e5\u770b\u5f53\u524dnamenode\u4e3b\u4ece\u60c5\u51b5<\/h4>\n<p><strong>\u6ce8\u610f<\/strong>\uff1a \u4ee5\u4e0b\u547d\u4ee4\u5fc5\u987b\u8981HDFS\u7684\u8d85\u7ea7<strong><code>\u7528\u6237hdfs<\/code><\/strong>\u624d\u80fd\u6267\u884c\uff0c\u6267\u884c\u5982\u4e0b\u5207\u6362\u5230 hdfs \u7528\u6237\uff1b<\/p>\n<pre><code class=\"language-shell\">$ export HADOOP_USER_NAME=hdfs<\/code><\/pre>\n<p>\u547d\u4ee4\u884c\u67e5\u770bnamenode\u4e3b\u4ece\u60c5\u51b5\uff0c\u7531\u4e0b\u56fe\u53ef\u77e5\uff0cmll01\u662factive\u8282\u70b9\uff0cmll02\u662fstandby\u8282\u70b9<\/p>\n<pre><code class=\"language-shell\">hdfs haadmin -getServiceState mll01\nhdfs haadmin -getServiceState mll02<\/code><\/pre>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/04\/image-1587535131419.png\" alt=\"file\" \/><\/p>\n<h4>\u624b\u52a8\u5207\u6362namenode<\/h4>\n<ol>\n<li>\u9700\u8981\u5c06 mll02 \u5207\u6362\u4e3a active \u72b6\u6001\u7684\u4e09\u79cd\u65b9\u6cd5<\/li>\n<\/ol>\n<pre><code class=\"language-shell\"># \u5c06 active \u72b6\u6001\u4ece mll01 \u8282\u70b9\u6545\u969c\u5207\u6362\u5230 mll02 \u4e0a\n$ hdfs haadmin -failover mll01 mll02\n\n# \u5c06 mll01 \u8fc7\u6e21\u5230 Standby\uff1b\n$ hdfs haadmin -transitionToStandby --forcemanual mll01\n\n# \u5c06 mll02 \u8fc7\u6e21\u5230 Active\uff1b\n$ hdfs haadmin -transitionToActive --forceactive mll02<\/code><\/pre>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/04\/image-1587535177522.png\" alt=\"file\" \/><\/p>\n<ol start=\"2\">\n<li>\u518d\u6b21\u67e5\u770bnamenode\u4e3b\u4ece\u72b6\u6001\uff0c\u53d1\u73b0mll02\u5df2\u7ecf\u53d8\u6210\u4e86active\u72b6\u6001<\/li>\n<\/ol>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/04\/image-1587535203582.png\" alt=\"file\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981\u63cf\u8ff0 HDFS\u91c7\u7528namenode HA\u65b9\u6848\u4fdd\u8bc1hdfs\u7684\u9ad8\u53ef\u9760\uff0c\u59cb\u7ec8\u6709\u4e00\u4e2a namenode \u505a\u70ed\u5907\uff0c\u9632 ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/kbwp.transwarp.cn\/?p=2817\" title=\"read more...\">Read more<\/a><\/p>\n","protected":false},"author":14,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[],"class_list":["post-2817","post","type-post","status-publish","format-standard","hentry","category-configuration"],"acf":[],"_links":{"self":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/2817","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/users\/14"}],"replies":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2817"}],"version-history":[{"count":3,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/2817\/revisions"}],"predecessor-version":[{"id":2925,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/2817\/revisions\/2925"}],"wp:attachment":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2817"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2817"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2817"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}