{"id":3346,"date":"2021-11-10T16:57:04","date_gmt":"2021-11-10T08:57:04","guid":{"rendered":"https:\/\/www.aoisnow.net\/blog\/?p=3346"},"modified":"2025-05-03T15:02:16","modified_gmt":"2025-05-03T07:02:16","slug":"day-12066-%e6%9c%89%e5%85%b3-hadoop-%e9%9b%86%e7%be%a4-datanode-%e7%b3%bb%e7%bb%9f%e7%9b%98%e6%8d%9f%e6%af%81%e5%90%8e%e9%87%8d%e5%bb%ba%e7%8e%af%e5%a2%83%e7%9a%84%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/www.aoisnow.net\/blog\/archives\/3346","title":{"rendered":"Day 5762 \u6709\u5173 Hadoop \u96c6\u7fa4 Datanode \u7cfb\u7edf\u76d8\u635f\u6bc1\u540e\u91cd\u5efa\u73af\u5883\u7684\u7b14\u8bb0"},"content":{"rendered":"

\u8eab\u8fb9\u6709\u4e00\u5957\u6ca1\u4ec0\u4e48\u4eba\u7528\u7684\u7cfb\u7edf\uff0c\u540e\u7aef\u91c7\u7528\u4e86 Hadoop \u4e00\u5f0f\u4e09\u4efd\u5b58\u50a8\u6570\u636e\u6587\u4ef6\u3002<\/p>\n

\u67d0\u65e5\uff0cAmbari \u62a5\u5176\u4e2d\u4e00\u53f0 Datanode \u7684 Heartbeat lost\uff0c\u4e14\u4e0d\u8bba\u901a\u8fc7\u4efb\u4f55\u65b9\u5f0f\u8fdc\u7a0b\u8fde\u63a5\u5747\u62a5 Connect refused\uff0c\u591a\u6b21\u5c1d\u8bd5\u65e0\u679c\u540e\u524d\u5f80\u673a\u623f\uff0c\u53d1\u73b0\u786c\u76d8 0 \u95ea\u7ea2\u706f\uff0c\u7ecf\u6838\u5bf9\u5382\u5546\u8bf4\u660e\uff0c\u5e76\u91cd\u65b0\u542f\u52a8\u670d\u52a1\u5668\u770b\u9635\u5217\u5361\u62a5\u544a\uff0c\u786e\u8ba4\u8be5\u786c\u76d8\u5df2\u6545\u969c\u6389\u76d8\u3002<\/p>\n

\u7531\u4e8e\u96c6\u7fa4\u5c1a\u6709\u53e6\u5916\u4e24\u53f0 Datanode \u5728\u7ebf\uff0c\u4e14\u91cd\u8981\u6587\u4ef6\u4ea6\u6709\u672c\u5730\u5907\u4efd\uff0c\u51b3\u5b9a\u91c7\u53d6\u91cd\u88c5\u7cfb\u7edf\u5e76\u91cd\u65b0\u540c\u6b65\u6240\u6709\u6587\u4ef6\u7684\u5f62\u5f0f\u8fdb\u884c\u7ef4\u62a4\u3002<\/p>\n

\u672c\u6587\u662f\u7ed9\u81ea\u5df1\u7684\u7b14\u8bb0\uff0c\u4e0d\u662f\u6559\u7a0b\uff0c\u7531\u4e8e\u672c\u6587\u8bb0\u8ff0\u7684\u662f\u6478\u7d22\u8fc7\u7a0b\uff0c\u5982\u679c\u60a8\u6709\u76f8\u4f3c\u7684\u60c5\u51b5\u9700\u8981\u5904\u7406\uff0c\u8bf7\u4e0d\u8981\u76f4\u63a5\u6309\u7167\u672c\u6587\u6b65\u9aa4\u8fdb\u884c\u64cd\u4f5c<\/strong>\u3002<\/p>\n

<\/p>\n

1\u3001\u66ff\u6362\u635f\u6bc1\u7684\u786c\u76d8<\/strong><\/p>\n

\u5173\u673a\u540e\u64a4\u6362\u6709\u95ee\u9898\u7684\u786c\u76d8\uff0c\u7136\u540e\u6bd4\u7167\u5176\u5b83 Datanode \u7684\u9635\u5217\u914d\u7f6e\u91cd\u65b0\u7ec4\u88c5\u9635\u5217\u5373\u53ef\uff0c\u5f88\u7b80\u5355\u4e0d\u518d\u8d58\u8ff0\u3002<\/p>\n

2\u3001\u91cd\u88c5\u64cd\u4f5c\u7cfb\u7edf<\/strong><\/p>\n

\u8282\u70b9\u4e0a\u4e4b\u524d\u5b89\u88c5\u7684\u662f CentOS 6.7\uff0c\u5c3d\u7ba1\u662f\u73b0\u5728\u5df2\u7ecf\u8fc7\u65f6\u7684\u64cd\u4f5c\u7cfb\u7edf\uff0c\u4e3a\u4e86\u4fdd\u6301\u4e0e\u539f\u6709\u73af\u5883\u4e00\u81f4\uff0c\u4ecd\u7136\u5b89\u88c5\u4e86\u8be5\u7248\u672c\u3002<\/p>\n

\u5b89\u88c5\u8fc7\u7a0b\u57fa\u672c\u4e00\u8def\u56de\u8f66\uff0c\u4f46\u7531\u4e8e\u5bf9\u4e8e Linux \u7684 LVM \u673a\u5236\u4e0d\u719f\u6089\uff0c\u91c7\u7528\u4e86\u9ed8\u8ba4\u7684\u5728\u78c1\u76d8 0 \u4e0a root \u548c home \u5206\u533a\u5206\u79bb\u7684\u5206\u533a\u65b9\u5f0f\uff08\u5f53\u65f6\u8fd8\u51c6\u5907\u4fdd\u7559\u78c1\u76d8 1 \u548c 2 \u4e0a\u7684\u5206\u533a\uff09\uff0c\u8be5\u914d\u7f6e\u5728\u4e4b\u540e\u7684\u914d\u7f6e\u8fc7\u7a0b\u4e2d\u5f15\u53d1\u4e86\u95ee\u9898\uff0c\u540e\u8ff0\u3002<\/p>\n

\u5b89\u88c5\u8fc7\u7a0b\u4e2d\u9700\u8981\u5c06\u4e3b\u673a\u540d\u914d\u7f6e\u4e3a\u8282\u70b9\u7684\u5185\u7f51\u57df\u540d\uff08\u672c\u4f8b\u4e3a dn3.hadoopcluster.com\uff09\uff0c\u5426\u5219\u5728\u540e\u9762\u7684\u914d\u7f6e\u8fc7\u7a0b\u4e2d\u5b89\u88c5 Hadoop \u7ec4\u4ef6\u65f6\u4f1a\u9020\u6210\u81ea\u52a8\u914d\u7f6e\u4e0d\u6b63\u786e\uff0c\u672c\u6b21\u56e0\u7f3a\u4e4f\u7ecf\u9a8c\u5c31\u9020\u6210\u4e86\u8fd9\u4e2a\u95ee\u9898\uff0c\u540e\u8ff0\u3002<\/p>\n

3\u3001\u914d\u7f6e\u7f51\u7edc<\/strong><\/p>\n

\u4fee\u6539 \/etc\/sysconfig\/network-scripts\/ \u4e0b\u5bf9\u5e94\u7f51\u5361\u7684\u914d\u7f6e\u6587\u4ef6\uff0c\u5982\uff1a\u7b2c\u4e00\u5757\u7f51\u5361\u901a\u5e38\u88ab\u8bc6\u522b\u4e3a eth0\uff0c\u5219\u4fee\u6539\u8be5\u76ee\u5f55\u4e0b\u7684 ifcfg-eth0 \u6587\u4ef6\u3002<\/p>\n

\u8ffd\u52a0\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n

\n
    \n
  • \u4fee\u6539 ONBOOT= \u4e3a yes<\/li>\n
  • \u4fee\u6539 BOOTPROTO= \u4e3a static\uff08\u672c\u673a\u4e3a\u9759\u6001 IP \u7684\u60c5\u51b5\uff09<\/li>\n
  • \u65b0\u589e IPADDR=IP\u5730\u5740\u3001NETMASK=\u4e3a\u5b50\u7f51\u63a9\u7801\u3001GATEWAY=\u4e3a\u7f51\u5173\u3001DNS1=\u3001DNS2=\u4e3a\u4e3b\u3001\u8f85DNS<\/li>\n
  • \u53ef\u9009\uff1a\u65b0\u589e IPV6INIT=no \u5173\u95ed IPv6\uff0c\u5728\u4ec5\u6709 IPv4 \u7684\u73af\u5883\u4e0b\u51cf\u5c11\u6ca1\u6709\u5fc5\u8981\u7684\u7684 IPv6 \u5730\u5740\u4ea7\u751f\u7684\u4fe1\u606f<\/li>\n<\/ul>\n<\/blockquote>\n

    \u5982\u679c\u5728\u4e0a\u9762\u9009\u62e9\u4e86\u5173\u95ed IPv6\uff0c\u8fd8\u9700\u8981\u4fee\u6539\u4ee5\u4e0b\u4f4d\u7f6e\uff1a<\/p>\n

    \n
      \n
    • \u4fee\u6539 \/etc\/sysctl.conf \u589e\u52a0 net.ipv6.conf.all.disable_ipv6 = 1<\/li>\n
    • \u4fee\u6539 \/etc\/sysconfig\/network \u589e\u52a0 NETWORKING_IPV6=no<\/li>\n<\/ul>\n<\/blockquote>\n

      \u4fee\u6539\u5b8c\u6210\u540e\u53ef\u4ee5\u91cd\u542f\u751f\u6548\uff0c\u4e5f\u53ef\u4ee5\u5206\u522b\u4f7f\u7528\u4ee5\u4e0b\u4e24\u6761\u6307\u4ee4\u7acb\u523b\u751f\u6548\uff1a<\/p>\n

      \n
        \n
      • \u91cd\u542f\u7f51\u7edc\u670d\u52a1\u4f7f IP \u914d\u7f6e\u751f\u6548\uff1aservice network restart<\/li>\n
      • \u4f7f IPv6 \u7684\u76f8\u5173\u4fee\u6539\u751f\u6548\uff1asysctl -p<\/li>\n<\/ul>\n<\/blockquote>\n

        4\u3001\u8bbe\u7f6e\u56fd\u5185\u6e90<\/strong><\/p>\n

        \u5b89\u88c5\u5b8c\u6210\u540e\u5efa\u8bae\u5c06 yum \u6e90\u8bbe\u7f6e\u4e3a\u56fd\u5185\u7684\u5730\u5740\uff0c\u4ee5\u52a0\u5feb\u8f6f\u4ef6\u5305\u7684\u5b89\u88c5\u4e0e\u66f4\u65b0\u7684\u901f\u5ea6\u3002<\/p>\n

        \u6b64\u5904\u4ee5\u6e05\u534e\u5927\u5b66 TUNA \u6e90\u4e3a\u4f8b\uff0c\u622a\u81f3\u672c\u6587\u6210\u6587\u4e3a\u6b62\uff0cCentOS 6.7 \u5df2\u5c5e\u4e8e\u5f52\u6863\u7684 vault \u6e90\uff0c\u4f9d\u7167 TUNA \u63d0\u4f9b\u7684\u5e2e\u52a9\u4fe1\u606f\uff0c\u4fee\u6539\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n

        \uff081\uff09\u5907\u4efd\u539f\u6709\u6587\u4ef6<\/span>\uff1acp -r \/etc\/yum.repos.d\/ \/etc\/yum.repos.d.bak\/<\/p>\n

        \uff082\uff09\u4fee\u6539 CentOS-Base.repo<\/span>\uff08\u5176\u5b83 repo \u6587\u4ef6\u9ed8\u8ba4\u6ca1\u6709\u542f\u7528\uff0c\u53ef\u4e0d\u4fee\u6539\uff09\uff1a<\/p>\n

        \n
          \n
        • \u5728\u6240\u6709\u7684 mirrorlist= \u524d\u9762\u52a0\u4e0a # \u6ce8\u91ca\u6389<\/li>\n
        • \u5c06\u6240\u6709\u7684 baseurl= \u524d\u9762\u7684 # \u53bb\u6389\u6ce8\u91ca<\/li>\n
        • \uff086.7 \u4e3a\u672c\u4f8b\u7684\u7cfb\u7edf\u7248\u672c\u53f7\uff0c\u53c2\u8003\u65f6\u8bf7\u6309\u81ea\u5df1\u7684\u5b9e\u9645\u60c5\u51b5\u4fee\u6539\uff09\u4fee\u6539\u6240\u6709 baseurl \u884c\u4e2d\u7684 mirror.centos.org\/centos\/$releasever<\/span> \u4e3a mirrors.tuna.tsinghua.edu.cn\/centos-vault\/6.7<\/strong><\/span><\/li>\n<\/ul>\n<\/blockquote>\n

          \uff083\uff09\u66f4\u65b0 yum \u7f13\u5b58<\/span>\uff1ayum makecache<\/p>\n

          5\u3001\u5b89\u88c5 JDK\uff0c\u53ca\u5176\u5b83\u51c6\u5907\u5de5\u4f5c<\/strong><\/p>\n

          \u5c06\u4ece\u5176\u5b83 Datanode \u4e0a\u590d\u5236\u6765\u7684 JDK \u538b\u7f29\u5305\u653e\u5728 \/usr\/soft \u76ee\u5f55\u4e0b\uff0c\u8fdb\u884c\u89e3\u538b\u7f29\uff0c\u5e76\u589e\u52a0\u6267\u884c\u6743\u9650\uff1a<\/p>\n

          cd \/usr\/soft<\/p>\n

          tar -zxvf jdk-7u79-linux-x64.tar.gz<\/p>\n

          chmod -R 755 jdk1.7.0_79\/<\/p><\/blockquote>\n

          \u7136\u540e\u914d\u7f6e JDK \u7684\u73af\u5883\u53d8\u91cf\uff0c\u5728 \/etc\/profile \u4e2d\u65b0\u589e\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n

          export JAVA_HOME=\/usr\/soft\/jdk1.7.0_79<\/p>\n

          export PATH=$PATH:$JAVA_HOME\/bin<\/p>\n

          export CLASSPATH=.:$JAVA_HOME\/lib:$JRE_HOME\/lib:$CLASSPATH<\/p><\/blockquote>\n

          \u5e76\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\u4f7f\u73af\u5883\u53d8\u91cf\u751f\u6548\uff1a<\/p>\n

          source \/etc\/profile<\/p><\/blockquote>\n

          \u5b8c\u6210\u540e\u6267\u884c\u4ee5\u4e0b\u6307\u4ee4\uff0c\u786e\u8ba4\u662f\u5426\u5b89\u88c5\u6210\u529f\uff1a<\/p>\n

          java -version<\/p><\/blockquote>\n

          \u8f93\u51fa Java \u7248\u672c\u8868\u793a\u5b89\u88c5\u6210\u529f\u3002<\/p>\n

          \u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\u7981\u7528\u900f\u660e\u5927\u9875\uff08Hadoop \u96c6\u7fa4\u8981\u6c42\uff09\uff1a<\/p>\n

          echo never > \/sys\/kernel\/mm\/redhat_transparent_hugepage\/enabled<\/p><\/blockquote>\n

          \u5982\u6709\u9700\u8981\uff0c\u5728\u505a\u597d\u5b89\u5168\u9632\u62a4\u7684\u524d\u63d0\u4e0b\uff0c\u5173\u95ed\u9632\u706b\u5899\uff1a<\/p>\n

          \/etc\/init.d\/iptables stop #\u6b64\u547d\u4ee4\u5173\u95ed\u9632\u706b\u5899<\/p>\n

          chkconfig iptables off #\u5173\u95ed\u9632\u706b\u5899\u7684\u5f00\u673a\u542f\u52a8<\/p><\/blockquote>\n

          6\u3001\u6062\u590d\u635f\u6bc1\u7684 Datanode \u8282\u70b9\u4e0e\u5176\u5b83\u8282\u70b9\u4e4b\u95f4\u7684\u4e92\u8bbf<\/strong><\/p>\n

          \u4fee\u6539 \/etc\/hosts \u6dfb\u52a0\u5230\u5176\u5b83\u673a\u5668\u7684\u8bbf\u95ee\uff1a<\/p>\n

          192.168.0.100 nn1.hadoopcluster.com<\/p>\n

          192.168.0.101 nn2.hadoopcluster.com<\/p>\n

          192.168.0.103 dn1.hadoopcluster.com<\/p>\n

          192.168.0.104 dn2.hadoopcluster.com<\/p>\n

          192.168.0.105 dn3.hadoopcluster.com #\u672c\u673a IP\uff0c\u4e5f\u662f\u672c\u6b21\u8981\u4fee\u590d\u7684 Datanode \u8282\u70b9<\/p><\/blockquote>\n

          \u5b89\u88c5 OpenSSH-Server\uff1a<\/p>\n

          yum install openssh-server -y<\/p><\/blockquote>\n

          \u751f\u6210\u5bc6\u94a5\u5bf9\uff1a<\/p>\n

          mkdir \/root\/.ssh<\/p>\n

          cd \/root\/.ssh<\/p>\n

          ssh-keygen -t rsa \/\/\u4e00\u8def\u56de\u8f66\u5373\u53ef<\/p><\/blockquote>\n

          \u6b64\u65f6\u4e0b\u4e00\u6b65\u539f\u672c\u5e94\u8be5\u662f\u5c06\u5404\u4e2a\u8282\u70b9\u7684\u516c\u94a5\uff08\/root\/.ssh\/id_rsa.pub<\/span>\uff09\u53d1\u9001\u5230\u4e3b Namenode \u8282\u70b9\uff08nn1.hadoopcluster.com\uff09\uff0c\u4f46\u7531\u4e8e\u9664\u4e86 dn3 \u4e0a\u7684\u673a\u5668\u4e0a\u8fd8\u4fdd\u7559\u7740 dn3 \u5d29\u6e83\u4e4b\u524d\u7684 SSH \u516c\u94a5\u4fe1\u606f\uff0c\u4e14 sshd \u9ed8\u8ba4\u60c5\u51b5\u4e0b\u5f00\u542f\u4e86 strict \u6a21\u5f0f\uff08\/etc\/ssh\/sshd_config \u4e2d\u8bbe\u7f6e\u4e86 StrictHostKeyChecking yes<\/strong>\uff09\uff0c\u4f1a\u9020\u6210\u5176\u5b83\u8282\u70b9\u8bbf\u95ee dn2 \u65f6\u56e0 host key \u9a8c\u8bc1\u5931\u8d25\u800c\u65e0\u6cd5\u8fde\u63a5\uff0c\u4f8b\u5982\uff0c\u5728\u505a\u51fa\u4e0b\u9762\u4fee\u6539\u7684\u4e4b\u524d\uff0c\u5c1d\u8bd5\u5728\u5176\u4f59\u8282\u70b9\u4e0a\u4f7f\u7528 ssh dn3.hadoopcluster.com \u4f1a\u51fa\u73b0\u4ee5\u4e0b\u63d0\u793a\uff1a<\/p>\n

          @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@<\/p>\n

          @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @<\/p>\n

          @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@<\/p>\n

          IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!<\/p>\n

          Someone could be eavesdropping on you right now (man-in-the-middle attack)!<\/p>\n

          It is also possible that a host key has just been changed.<\/p>\n

          The fingerprint for the ECDSA key sent by the remote host is SHA256:HDjXJvu0VYXWF+SKMZjSGn4FQmg\/+w6eV9ljJvIXpx0.<\/p>\n

          Please contact your system administrator.<\/p>\n

          Add correct host key in \/root\/.ssh\/known_hosts to get rid of this message.<\/p>\n

          Offending ECDSA key in \/root\/.ssh\/known_hosts:5<\/p>\n

          ECDSA host key for dn3.hadoopcluster.com has changed and you have requested strict checking.<\/p>\n

          Host key verification failed.<\/strong><\/p><\/blockquote>\n

          \u6240\u4ee5\u9700\u8981\u5148\u53bb\u5404\u4e2a\u673a\u5668\u4e0a\u5220\u6389\u5df2\u77e5\u4e3b\u673a\u516c\u94a5\u5e93\u4e2d\u7684 dn3 \u516c\u94a5\uff1a<\/p>\n

          \n
            \n
          • \u9996\u5148\u5907\u4efd \/root\/.ssh\/known_hosts<\/li>\n
          • \u7136\u540e\u5220\u9664\u4e2d\u6587\u4ef6\u539f\u6765 dn3.hadoopcluster.com<\/span> \u7684\u4e00\u6574\u884c\uff0c\u4fdd\u5b58\u5373\u53ef\uff08\u4e5f\u53ef\u4f7f\u7528 ssh-keygen -R dn3.hadoopcluster.com\uff09<\/li>\n
          • \u4ee5\u4e0a\u64cd\u4f5c\u9700\u8981\u5728 nn1\u3001nn2\u3001dn1\u3001dn2 \u4e0a\u5206\u522b\u6267\u884c<\/li>\n<\/ul>\n<\/blockquote>\n

            \u63a5\u4e0b\u6765\u5728 nn1 \u4e0a\u62c9\u53d6 dn3 \u7684\u516c\u94a5\u5230 ~\/.ssh\/\uff08\u53ef\u80fd\u9700\u8981\u8f93\u5165 dn3 \u7684 root \u8d26\u6237\u548c\u5bc6\u7801\uff09\uff1a<\/p>\n

            cd ~\/.ssh\/<\/p>\n

            scp root@dn3.hadoopcluster.com:~\/.ssh\/id_rsa.pub id_rsa_dn3.pub<\/p><\/blockquote>\n

            \u5c06\u6240\u6709\u516c\u94a5\u96c6\u5408\u4e3a\u5df2\u8ba4\u8bc1\u516c\u94a5\u5e93 authorized_keys\uff0c\u5e76\u5907\u4efd\u539f\u6765\u7684\u6587\u4ef6\u4ee5\u9632\u4e07\u4e00\uff1a<\/p>\n

            # \u6ce8\u610f\u6b64\u65f6\u5df2\u4fdd\u5b58\u7684\u516c\u94a5\u6587\u4ef6\u540d\u5747\u4e3a id_rsa_*.pub \u7684\u683c\u5f0f\uff0c\u5305\u62ec nn1 \u672c\u8eab\u7684\uff09<\/p>\n

            cp authorized_keys authorized_keys.bak<\/p>\n

            cat id_rsa_*.pub >> ~\/.ssh\/authorized_keys<\/p><\/blockquote>\n

            \u7136\u540e\u5c06\u8ba4\u8bc1\u5e93\u53d1\u9001\u5230\u5176\u5b83\u673a\u5668\u4e0a\uff1a<\/p>\n

            scp ~\/.ssh\/authorized_keys root@nn2.hadoopcluster.com<\/p>\n

            scp ~\/.ssh\/authorized_keys root@dn1.hadoopcluster.com<\/p>\n

            scp ~\/.ssh\/authorized_keys root@dn2.hadoopcluster.com<\/p><\/blockquote>\n

            \u6700\u540e\uff0c\u91cd\u5efa\u5176\u5b83\u8282\u70b9\u5230 DN3 \u7684\u8fde\u901a\u6027\uff1a<\/p>\n

            ssh dn3.hadoopcluster.com #\u9700\u8981\u5728\u6240\u6709\u673a\u5668\u4e0a\u4f9d\u6b21\u6267\u884c\u4e00\u904d\uff0c\u5305\u62ec dn3 \u81ea\u5df1<\/p>\n

            # \u867d\u7136\u4e5f\u53ef\u4ee5\u5728 nn1 \u4e0a\u8fde\u63a5\u4e00\u6b21\u7136\u540e\u5c06 known_hosts \u53d1\u5e03\u5230\u5176\u5b83\u5404\u4e3b\u673a\u4e0a\uff0c\u4f46\u4e3a\u6c42\u7a33\u59a5\uff0c\u6700\u597d\u662f\u5b9e\u9645\u53bb\u5404\u53f0\u673a\u5668\u4e0a\u8fde\u63a5\u4e00\u904d<\/p><\/blockquote>\n

            \u51fa\u73b0\u4ee5\u4e0b\u63d0\u793a\u65f6\u8f93\u5165 yes \u5c06 dn3 \u7684\u65b0 host key \u52a0\u5165\u672c\u5730\u7684 known_hosts\uff1a<\/p>\n

            The authencity of host ‘dn3.hadoopcluster.com (192.168.0.105)’\u00a0 can’t be established.<\/p>\n

            ECDSA key fingerprint is SHA256:HDjXJvu0VYXWF+SKMZjSGn4FQmg\/+w6eV9ljJvIXpx0.<\/p>\n

            Are you sure you want to continue connecting (yes\/no): # \u8f93\u5165yes<\/p><\/blockquote>\n

            7\u3001\u4f7f\u7528 Ambari \u4e3a\u65b0\u7684 Datanode \u5b89\u88c5 Hadoop \u8f6f\u4ef6<\/strong><\/p>\n

            \u672c\u4f8b\u4e2d Ambari \u5b89\u88c5\u4e8e nn1\uff0c\u7531\u4e8e\u6ca1\u6709\u4fdd\u7559\u622a\u56fe\uff0c\u7b80\u8ff0\u4e00\u4e0b\u6b65\u9aa4\uff1a<\/p>\n

            \uff081\uff09\u5728 Hosts \u4e2d\u70b9\u51fb Actions – Add hosts<\/p>\n

            \uff082\uff09\u5411\u5bfc\u7b2c\u4e00\u6b65\u4e2d\uff0cTarget hosts \u586b\u5199\u8981\u5b89\u88c5\u8f6f\u4ef6\u7684 FQDN\uff08\u4e0d\u80fd\u586b\u5199 IP\uff0c\u8be5\u57df\u540d\u4e0d\u9700\u8981\u5728\u516c\u7f51\u80fd\u89e3\u6790\uff0c\u672c\u4f8b\u4e3a dn3.hadoopcluster.com\uff09\uff0c\u5e76\u5728 Host Registration Information \u4e0a\u4f20\u8981\u5b89\u88c5\u8f6f\u4ef6\u7684\u4e3b\u673a SSH \u79c1\u94a5\uff08~\/.ssh\/id_rsa\uff0c\u591a\u4e2a\u4e3b\u673a\u5c06\u591a\u4e2a\u79c1\u94a5\u6587\u4ef6\u62fc\u63a5\u8d77\u6765\u5373\u53ef\uff09\u3002SSH User account \u548c SSH Port number \u65e0\u7279\u6b8a\u60c5\u51b5\u53ef\u4ee5\u4fdd\u7559\u539f\u6837\u3002<\/p>\n

            \uff083\uff09\u5411\u5bfc\u7b2c\u4e8c\u6b65\u4f1a\u68c0\u67e5\u73af\u5883\uff0c\u6709\u95ee\u9898\u4f1a\u8fdb\u884c\u63d0\u793a\uff0c\u8fdb\u884c\u5bf9\u5e94\u4fee\u590d\u5373\u53ef\u3002<\/p>\n

            \uff084\uff09\u5411\u5bfc\u7b2c\u4e09\u6b65\u4e2d\uff0c\u52fe\u9009\u5b89\u88c5 Datanode\u3001Zookeeper \u548c Ambari Metrics<\/p>\n

            \uff085\uff09\u7b49\u5f85\u5b8c\u6210\u5b89\u88c5\u5373\u53ef\u3002<\/p>\n

            8\u3001\u5c0f\u63d2\u66f2\uff1a\u505c\u4e0b\u5c31\u518d\u4e5f\u9192\u4e0d\u8fc7\u6765\u7684 Datanode<\/strong><\/p>\n

            \u5b8c\u6210\u4e0a\u8ff0\u6b65\u9aa4\u540e\uff0c\u53d1\u73b0 Datanode \u8fdf\u8fdf\u4e0d\u5f00\u59cb\u540c\u6b65\uff08\u5b9e\u9645\u539f\u56e0\u540e\u8ff0\uff09\uff0c\u5c1d\u8bd5\u91cd\u542f Datanode \u670d\u52a1\u4f46\u662f\u4e0d\u6210\u529f\uff0c\u901a\u8fc7\u67e5\u770b\u65e5\u5fd7\uff08\/var\/log\/hadoop\/hdfs\/hadoop-hdfs-datanode-dn3.hadoopcluster.com.log\uff09\u53d1\u73b0\u5982\u4e0b\u4fe1\u606f\uff1a<\/p>\n

            java.net.BindException: Problem binding to [0.0.0.0:50010] java.net.BindException: Address already in use; For more details see: http:\/\/wiki.apache.org\/hadoop\/BindException<\/p><\/blockquote>\n

            \u4f46\u5982\u679c\u6309\u7167\u7f51\u4e0a\u641c\u51fa\u6765\u7684\u65b9\u6cd5\uff0c\u4f7f\u7528 netstat -tunlp|grep 50010 \u5c1d\u8bd5\u627e\u51fa\u5360\u7528 TCP 50010 \u7aef\u53e3\u7684\u8fdb\u7a0b\u7684\u8bdd\uff0c\u4f1a\u53d1\u73b0\u6ca1\u6709\u4efb\u4f55\u8f93\u51fa\uff0c\u800c\u4f7f\u7528 netstat -n|grep 50010 \u67e5\u770b\u7684\u8bdd\uff0c\u4f1a\u53d1\u73b0\u4e00\u4e2a\u5904\u4e8e TIME_WAIT \u72b6\u6001\u7684\u5728 50010 \u7aef\u53e3\u4e0a\u7684\u8fde\u63a5\u3002<\/p>\n

            \u901a\u8fc7\u67e5\u627e\u8d44\u6599\uff0c\u5728 \/etc\/sysctl.conf \u4e2d\u589e\u52a0\u4ee5\u4e0b\u53c2\u6570\u53ef\u4ee5\u7f13\u89e3\u6b64\u95ee\u9898\uff1a<\/p>\n

            net.ipv4.tcp_tw_reuse = 1
            \nnet.ipv4.tcp_tw_recycle = 1<\/p><\/blockquote>\n

            \u5176\u4e2d\u7b2c\u4e00\u884c\u7528\u4e8e\u542f\u7528 TCP \u8fde\u63a5\u91cd\u7528\uff0c\u5141\u8bb8\u5185\u6838\u91cd\u7528\u5904\u4e8e TIME_WAIT \u72b6\u6001\u7684\u8fde\u63a5\uff1b\u7b2c\u4e8c\u884c\u7528\u4e8e\u542f\u7528 TIME_WAIT \u8fde\u63a5\u7684\u5c3d\u5feb\u56de\u6536\uff08\u6ce8\uff1a\u672c\u6848\u4f8b\u5904\u4e8e\u6bd4\u8f83\u7b80\u5355\u7684\u7f51\u7edc\u5e03\u5c40\u4e0b\uff0c\u8bf7\u4e0d\u8981\u5728 NAT \u590d\u6742\u73af\u5883\u4e0b\u542f\u7528\u8be5\u53c2\u6570<\/strong>\uff09\u3002<\/p>\n

            \u4fee\u6539\u5b8c\u6210\u540e\u91cd\u542f\uff08sysctl -p \u53ef\u4ee5\u7acb\u523b\u751f\u6548\u4f46\u4e4b\u524d\u7684 TIME_WAIT \u8fde\u63a5\u4ecd\u5728\uff09\uff0c\u73b0\u5728 Datanode \u91cd\u542f\u57fa\u672c\u4e0d\u4f1a\u9047\u5230 Address already in use \u7684\u60c5\u51b5\u4e86\u3002<\/p>\n

            9\u3001\u6269\u5145 \/ \u5206\u533a<\/strong><\/p>\n

            \u5b8c\u6210\u4e0a\u8ff0\u5b89\u88c5\u6b65\u9aa4\u540e\uff0c\u6309\u8bf4\u53ea\u9700\u8981\u7b49\u5f85 Hadoop \u81ea\u52a8\u540c\u6b65\u6240\u6709\u6587\u4ef6\u5373\u53ef\uff0c\u4f46\u8fc7\u4e86\u4e00\u5929 Under replicated blocks \u4ecd\u7136\u6709\u597d\u51e0\u4e07\u3002<\/p>\n

            \u7ecf\u8fc7\u5bf9\u591a\u5904\u53c2\u6570\u7684\u67e5\u770b\uff0c\u6700\u540e\u7ec8\u4e8e\u5728 dn3 \u7684 Datanode web \u754c\u9762\uff08dn3.hadoopcluster.com:50070\uff09\u4e0a\u53d1\u73b0\u4e00\u5904\u7aef\u502a\uff1aCapacity Left \u4e00\u76f4\u662f 0 B\u3002<\/p>\n

            \u7ecf\u67e5\u770b\u914d\u7f6e\u6587\u4ef6\uff0c\u5f97\u77e5\u9ed8\u8ba4\u7684 Hadoop \u6570\u636e\u76ee\u5f55 \/hadoop\/hdfs\/data \u5b58\u5728\u4e8e \/ \u4e0b\uff08df -h \/hadoop \u67e5\u770b\u6240\u5728\u5206\u533a<\/strong>\uff09\uff0c\u4f46\u7531\u4e8e\u5b89\u88c5\u7cfb\u7edf\u65f6\u5c06 \/ \u548c \/home \u8fdb\u884c\u4e86\u5212\u5206\uff08\u5b9e\u9645\u5e94\u8be5\u91c7\u53d6\u5168\u76d8 \/ \u7684\u5206\u533a\u5f62\u5f0f\uff09\uff0c\u5bfc\u81f4 \/ \u76ee\u5f55\u53ea\u6709\u51e0\u767e MB \u7684\u5bb9\u91cf\uff0c\u5728 Hadoop \u5f00\u59cb\u8282\u70b9\u540c\u6b65\u540e\u5f88\u5feb\u88ab\u586b\u6ee1\uff0c\u5bfc\u81f4\u540c\u6b65\u65e0\u6cd5\u7ee7\u7eed\u8fdb\u884c\u3002<\/p>\n

            \u7531\u4e8e\u5177\u4f53\u4fee\u6539\u7684\u8fc7\u7a0b\u6ca1\u6709\u7559\u4e0b\u622a\u56fe\u6216\u65e5\u5fd7\uff0c\u6545\u4ee5\u4e0b\u7b80\u5355\u8bb0\u5f55\u6240\u8fdb\u884c\u7684\u64cd\u4f5c\uff1a<\/p>\n

            \uff081\uff09\u7531\u4e8e\u7b2c2\u30013\u5757\u78c1\u76d8\u5728\u9635\u5217\u5361\u4e2d\u88ab\u914d\u7f6e\u4e3a\u4e00\u5757\u865a\u62df\u78c1\u76d8\uff0c\u5728\u5f53\u524d\u7cfb\u7edf\u4e2d\u88ab\u8bc6\u522b\u4e3a \/dev\/sdb1\uff0c\u9042\u5c1d\u8bd5\u6302\u8f7d\uff08mkdir \/mnt\/sdb1 && mount \/dev\/sdb1 \/mnt\/sdb1\uff09\u67e5\u770b\u5185\u5bb9\uff0c\u51fa\u73b0\u7c7b\u4f3c\u5982\u4e0b\u63d0\u793a\uff1a<\/p>\n

            mount: unknown filesystem type ‘LVM2_member’<\/p><\/blockquote>\n

            \u7ecf\u641c\u7d22\uff0c\u4e3a CentOS 6.7 \u4e2d\u9ed8\u8ba4\u9009\u9879\u672a\u5b89\u88c5 lvm2 \u6240\u81f4\uff0c\u4f7f\u7528\u4ee5\u4e0b\u6307\u4ee4\u5b89\u88c5\uff1a<\/p>\n

            yum install lvm2<\/p><\/blockquote>\n

            \uff082\uff09\u5b89\u88c5\u540e\u4f7f\u7528 pvs \u67e5\u770b\u7269\u7406\u5377\u60c5\u51b5\uff0c\u53d1\u73b0 \/dev\/sdb1 \u4ece\u5c5e\u4e8e\u4e22\u5931\u7684VG\uff1a<\/p>\n

            Couldn’t find device with uuid ’56ogEk-OzLS-cKBc-z9vJ-kP65-DUBI-hwZPSu’.<\/p><\/blockquote>\n

            \uff083\uff09\u5c1d\u8bd5\u4f7f\u7528 pvcreate –uuid \u4e22\u5931\u7684\u8bbe\u5907UUID\u00a0<\/strong>\/dev\/sdc –restorefile \/etc\/lvm\/backup\/\u539f\u6765\u7684vg\u540d\u79f0<\/strong> \u65e0\u6548\uff0c\u56e0\u4e3a restorefile \u53c2\u6570\u9700\u8981\u6307\u5411vg\u5143\u6570\u636e\u5907\u4efd\u6587\u4ef6\uff0c\u800c\u8fd9\u4e2a\u6587\u4ef6\u5df2\u7ecf\u968f\u7740\u7cfb\u7edf\u76d8\u635f\u6bc1\u4e00\u5e76\u4e22\u5931\u4e86\u3002<\/p>\n

            \uff084\uff09\u6700\u540e\u653e\u5f03\u62a2\u6551\u65e7\u7684 vg\uff0c\u5220\u9664\u5931\u6548\u7684 vg\uff0c\u5e76\u5c06\u73b0\u6709\u7684 vg \u6269\u5c55\u5230 sdb1 \u4e0a\uff08\u6b64\u65f6\u7531\u4e8e\u53c2\u8003\u67d0\u4e9b\u6559\u7a0b\uff0c\u8fd8\u6ca1\u6709\u6ce8\u610f\u5230 \/hadoop \u4e0d\u5728 \/home \u4e0b\u800c\u5728 \/ \u4e0b\uff09\uff1a<\/p>\n

            vgremove \u65e7\u7684vg\u540d\u79f0<\/strong> –removemissing #\u5220\u9664\u65e7\u7684vg<\/p>\n

            vgextend \u5f53\u524d\u7cfb\u7edf\u6240\u5728vg\u540d\u79f0<\/strong> \/dev\/sdb1 #\u5c06\u73b0\u6709vg\u6269\u5c55\u5230sdb1\u4e0a<\/p>\n

            lvextend -l +100%FREE \/dev\/\u5f53\u524d\u7cfb\u7edf\u6240\u5728vg\u540d\u79f0<\/strong>\/lv_home #\u5c06\u6269\u5c55\u540e\u7684vg\u53ef\u7528\u7a7a\u95f4\u5168\u90e8\u5206\u914d\u7ed9lv_home<\/p>\n

            resize2fs -p -F \/dev\/\u5f53\u524d\u7cfb\u7edf\u6240\u5728vg\u540d\u79f0<\/strong>\/lv_home #\u5206\u533a\u6269\u5c55\u540e\uff0c\u5728\u7ebf\u6269\u5c55\u6587\u4ef6\u7cfb\u7edf<\/p><\/blockquote>\n

            \uff085\uff09\u540e\u6765\u7ec8\u4e8e\u610f\u8bc6\u5230 \/hadoop \u5728 \/ \u4e0b\uff0c\u6267\u884c\u4e86\u4ee5\u4e0b\u64cd\u4f5c\u5220\u9664 \/home \u5e76\u5c06\u53ef\u7528\u7a7a\u95f4\u5206\u914d\u7ed9 \/\uff1a<\/p>\n

            \u9996\u5148\u53bb Ambari \u4e2d\u505c\u6b62\u6240\u6709\u5728 DN3 \u4e0a\u7684\u670d\u52a1<\/p>\n

            tar cvf \/tmp\/home.tar \/home #\u5907\u4efd \/home \u4e2d\u7684\u5185\u5bb9\uff0c\u5b8c\u6210\u540e\u5c06 home.tar \u4e0b\u8f7d\u5230\u672c\u5730\u5907\u7528<\/p>\n

            umount \/home #\u5378\u8f7d \/home<\/p>\n

            \u7f16\u8f91 \/etc\/fstab \u6587\u4ef6\uff0c\u5c06\u5176\u4e2d\u539f\u6709\u6302\u8f7d home \u5206\u533a\u7684\u884c\u52a0\u4e0a # \u6ce8\u91ca\u6389\uff0c\u907f\u514d\u4e0b\u6b21\u91cd\u542f\u540e\u67e5\u627e\u4e0d\u5b58\u5728\u7684 home \u5206\u533a<\/p>\n

            lvremove \/dev\/mapper\/\u5f53\u524d\u7cfb\u7edf\u6240\u5728vg\u540d\u79f0\u4e0b\u7684lv_home\u5206\u533a\uff08\u5982vg_hadoopdn3-lv_home\uff09<\/strong>#\u5220\u9664\u65e7\u7684home\u903b\u8f91\u5377<\/p>\n

            lvextend -l +100%FREE \/dev\/mapper\/\u5f53\u524d\u7cfb\u7edf\u6240\u5728vg\u540d\u79f0\u4e0b\u7684lv_root\u5206\u533a\uff08\u5982vg_hadoopdn3-lv_root\uff09<\/strong>#\u5c06\u53ef\u7528\u7a7a\u95f4\u5168\u90e8\u6269\u5c55\u7ed9\/<\/p>\n

            resize2fs \/dev\/mapper\/\u5f53\u524d\u7cfb\u7edf\u6240\u5728vg\u540d\u79f0\u4e0b\u7684lv_root\u5206\u533a\uff08\u5982vg_hadoopdn3-lv_root\uff09<\/strong>#\u6269\u5145\u6587\u4ef6\u7cfb\u7edf<\/p>\n

            \u5982\u6709\u5fc5\u8981\uff0c\u4f7f\u7528\u521a\u521a\u5907\u4efd\u7684\u6587\u4ef6\u6062\u590d \/home \u76ee\u5f55\u4e0b\u7684\u6587\u4ef6<\/p>\n

            \u53bb Ambari \u4e2d\u91cd\u542f\u670d\u52a1<\/p><\/blockquote>\n

            10\u3001\u603b\u7ed3<\/strong><\/p>\n

            \u7ecf\u8fc7\u4ee5\u4e0a\u4e00\u901a\u6298\u817e\uff0c\u635f\u6bc1\u7684 DN3 \u8282\u70b9\u7ec8\u4e8e\u91cd\u65b0\u4e0a\u7ebf\uff0c\u7ecf\u8fc7\u5927\u7ea6\u4e00\u5468\u7684\u91cd\u65b0\u540c\u6b65\uff0cUnder replicated blocks \u6e05\u96f6\uff0c\u7cfb\u7edf\u6062\u590d\u5230\u90e8\u5206\u635f\u6bc1\u4e4b\u524d\u7684\u60c5\u51b5\u3002<\/p>\n

            \u4ee5\u4e0a\u662f\u672c\u4eba\u5728\u4e59\u65b9\u63d0\u4f9b\u7684\u8bf4\u660e\u4e66\u53ea\u63d0\u53ca\u4e86\u5982\u4f55\u901a\u8fc7 Ambari \u8fdb\u884c Hadoop \u8f6f\u4ef6\u5b89\u88c5\u7684\u60c5\u51b5\u4e0b\u5bf9 Hadoop datanode \u635f\u6bc1\u5c1d\u8bd5\u6062\u590d\u7684\u7b14\u8bb0\uff0c\u4e2d\u95f4\u7ed5\u4e86\u4e0d\u5c11\u5f2f\u5b50\uff0c\u5e78\u800c\u6700\u540e\u6210\u529f\u89e3\u51b3\u4e86\uff0c\u53ef\u559c\u53ef\u8d3a\u3002<\/p>\n

            \u518d\u6b21\u63d0\u9192\uff1a\u672c\u6587\u662f\u7b14\u8bb0\uff0c\u4e0d\u662f\u6559\u7a0b\uff0c\u8bf7\u52ff\u9010\u6b65\u7167\u505a\u3002<\/strong>\u540c\u65f6\u7531\u4e8e\u672c\u4eba\u5e76\u975e\u4e13\u4e1a\u8fd0\u7ef4\uff0c\u4e14\u672c\u6587\u6210\u6587\u95f4\u9694\u65f6\u95f4\u8f83\u957f\uff0c\u90e8\u5206\u6b65\u9aa4\u80af\u5b9a\u4e0d\u662f\u6700\u4f18\u89e3\uff0c\u4ec5\u4f9b\u53c2\u8003\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

            \u8eab\u8fb9\u6709\u4e00\u5957\u6ca1\u4ec0\u4e48\u4eba\u7528\u7684\u7cfb\u7edf\uff0c\u540e\u7aef\u91c7\u7528\u4e86 Hadoop \u4e00\u5f0f\u4e09\u4efd\u5b58\u50a8\u6570\u636e\u6587\u4ef6\u3002 \u67d0\u65e5\uff0cAmbari \u62a5\u5176\u4e2d\u4e00\u53f0 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-3346","post","type-post","status-publish","format-standard","hentry","category-sketch"],"_links":{"self":[{"href":"https:\/\/www.aoisnow.net\/blog\/wp-json\/wp\/v2\/posts\/3346","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.aoisnow.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.aoisnow.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.aoisnow.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.aoisnow.net\/blog\/wp-json\/wp\/v2\/comments?post=3346"}],"version-history":[{"count":0,"href":"https:\/\/www.aoisnow.net\/blog\/wp-json\/wp\/v2\/posts\/3346\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.aoisnow.net\/blog\/wp-json\/wp\/v2\/media?parent=3346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.aoisnow.net\/blog\/wp-json\/wp\/v2\/categories?post=3346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.aoisnow.net\/blog\/wp-json\/wp\/v2\/tags?post=3346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}