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一、虚拟机配置

虚拟机规划

二、Hadoop 高可用（HA）实现(QJM)

1、node1主机上修改配置文件

修改core-site.xml

[root@node1 ~]# vi /opt/hadoop/etc/hadoop/core-site.xml #修改为如下： <configuration> <property> <name>fs.defaultFS</name> <value>hdfs://mycluster</value> </property> <property> <name>hadoop.tmp.dir</name> <value>/hadoop-full/</value> </property> </configuration>

修改hdfs-site.xml

[root@node1 hadoop]# vi /opt/hadoop/etc/hadoop/hdfs-site.xml #修改内容为如下： <configuration> <property> <name>dfs.nameservices</name> <value>mycluster</value> </property> <property> <name>dfs.ha.namenodes.mycluster</name> <value>nn1,nn2</value> </property> <property> <name>dfs.namenode.rpc-address.mycluster.nn1</name> <value>node1:8020</value> </property> <property> <name>dfs.namenode.rpc-address.mycluster.nn2</name> <value>node2:8020</value> </property> <property> <name>dfs.namenode.http-address.mycluster.nn1</name> <value>node1:50070</value> </property> <property> <name>dfs.namenode.http-address.mycluster.nn2</name> <value>node2:50070</value> </property> <property> <name>dfs.namenode.shared.edits.dir</name> <value>qjournal://node1:8485;node2:8485;node3:8485/mycluster</value> </property> <property> <name>dfs.client.failover.proxy.provider.mycluster</name> <value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value> </property> <property> <name>dfs.ha.fencing.methods</name> <value>sshfence</value> </property> <property> <name>dfs.ha.fencing.ssh.private-key-files</name> <value>/root/.ssh/id_rsa</value> </property> <property> <name>dfs.journalnode.edits.dir</name> <value>/hadoop-full/journalnode</value> </property> <property> <name>dfs.replication</name> <value>3</value> </property> <property> <name>dfs.permissions.enabled</name> <value>false</value> </property> </configuration>

2、分发配置文件至node2，node3，node4

[root@node1 ~]#cd /opt/hadoop/etc/hadoop/ [root@hadoop ~]# scp core-site.xml hdfs-site.xml node2:/`pwd` [root@hadoop ~]# scp core-site.xml hdfs-site.xml node3:/`pwd` [root@hadoop ~]# scp core-site.xml hdfs-site.xml node4:/`pwd`

3、启动journalnode

[root@node1 ~]# hadoop-daemon.sh start journalnode [root@node2 ~]# hadoop-daemon.sh start journalnode [root@node3 ~]# hadoop-daemon.sh start journalnode

4、HDFS Namenode数据同步

格式化(第一次配置情况下使用，已运行集群不能用)

[root@node1 ~]# hdfs namenode -format 2020-01-27 11:09:37,394 mon.Storage: Storage directory /hadoop-full/dfs/name has been successfully formatted. [root@node1 ~]# hadoop-daemon.sh start namenode

共享日志文件初初始化（已运行的非HA集群使用）

[root@node1 ~]#hdfs namenode -initializeSharedEdits

启动node1上的namenode节点

[root@node1 ~]#hadoop-daemon.sh start namenode

node2节点同步镜像数据

[root@node2 ~]# hdfs namenode -bootstrapStandby

node2节点上启动namenode

[root@node2 ~]#hadoop-daemon.sh start namenode

5、启动datanode节点

[root@node2 ~]#hadoop-daemon.sh start datanode [root@node3 ~]# hadoop-daemon.sh start datanode [root@node4 ~]# hadoop-daemon.sh start datanode

6、提升namenode节点为active状态

hdfs haadmin -transitionToActive nn1

7、验证

命令行验证

[root@node1 ~]# jps 2948 Jps 1829 NameNode 2013 JournalNode [root@node2 ~]# jps 2029 Jps 1455 NameNode 1519 DataNode 1599 JournalNode [root@node3 ~]# jps 1335 Jps 1195 DataNode 1275 JournalNode [root@node4 ~]# jps 997 Jps 967 DataNode

网页查看

集群启动

8、命令行操作HA集群

查看服务状态

[root@node1 ~]#hdfs haadmin -getServiceState nn1

设置namenode为active节点

设置namenode为active节点

设置namenode为Standby

[root@node1 ~]#hdfs haadmin -transitionToStandby nn1

手动故障切换

[root@node1 ~]#hdfs haadmin -failover nn1 nn2

三、Zookeeper安装配置

1、修改主机hosts文件

[root@node2 conf]# vi /etc/hosts #添加如下内容 127.0.0.1 localhost

2、上传zookeeper安装包到node2上

3、解压安装包到指定目录

[root@node2 ~]# tar -zxvf zookeeper-3.4.6.tar.gz -C /opt/

4、重命名目录

[root@node2 ~]# mv /opt/zookeeper-3.4.6/ /opt/zookeeper

5、修改配置文件

重命名配置文件

[root@node2 ~]#cd /opt/zookeeper/conf/ [root@node2 conf]#cp zoo_sample.cfg zoo.cfg

修改配置文件

[root@node2 conf]#vi zoo.cfg #12行修改为如下内容 dataDir=/hadoop-full/zookeeper #文件末尾添加如下内容 server.1=node2:2888:3888 server.2=node3:2888:3888 server.3=node4:2888:3888

5、添加环境变量

修改配置文件

[root@node2 ~]# vi /etc/profile.d/hadoop.sh #修改为如下内容 export JAVA_HOME=/opt/jdk export HADOOP_HOME=/opt/hadoop export ZOOKEEPER_HOME=/opt/zookeeper export PATH=$PATH:$JAVA_HOME/bin:$HADOOP_HOME/sbin:$HADOOP_HOME/bin:$ZOOKEEPER_HOME/bin

重新编译文件

[root@node2 ~]# source /etc/profile

6、创建工作目录

[root@node2 ~]# mkdir -p /hadoop-full/zookeeper [root@node2 ~]# echo 1 >/hadoop-full/zookeeper/myid

7、分发文件

分发hosts文件

[root@node2 conf]# scp /etc/hosts node3:/etc/hosts [root@node2 conf]# scp /etc/hosts node4:/etc/hosts

分发环境变量

[root@node2 ~]# scp /etc/profile.d/hadoop.sh node3:/etc/profile.d/ [root@node2 ~]# scp /etc/profile.d/hadoop.sh node4:/etc/profile.d/

编译profile文件

[root@node3 ~]# source /etc/profile [root@node4 ~]# source /etc/profile

分发zookeeper安装文件

[root@node2 ~]# scp -r /opt/zookeeper node3:/opt/ [root@node2 ~]# scp -r /opt/zookeeper node4:/opt/

[root@node2 ~]# scp -r /hadoop-full/zookeeper node3:/hadoop-full/ [root@node2 ~]# scp -r /hadoop-full/zookeeper node4:/hadoop-full/

8、修改myid文件

[root@node3 ~]# echo 2 >/hadoop-full/zookeeper/myid [root@node4 ~]# echo 3 >/hadoop-full/zookeeper/myid

9、启动服务

[root@node2 ~]# zkServer.sh start [root@node3 ~]# zkServer.sh start [root@node4 ~]# zkServer.sh start

10、查看状态

[root@node2 opt]# zkServer.sh status JMX enabled by default Using config: /opt/zookeeper/bin/../conf/zoo.cfg Mode: follower [root@node3 ~]# zkServer.sh status JMX enabled by default Using config: /opt/zookeeper/bin/../conf/zoo.cfg Mode: leader [root@node4 ~]# zkServer.sh status JMX enabled by default Using config: /opt/zookeeper/bin/../conf/zoo.cfg Mode: follower

五、Zookeeper实现Hadoop Namenode HA故障自动切换

1、node1主机上修改配置文件

修改core-site.xml

[root@node1 ~]# vi /opt/hadoop/etc/hadoop/core-site.xml #原有内容上添加为如下内容： <configuration> <property> <name>ha.zookeeper.quorum</name> <value>node2:2181,node3:2181,node4:2181</value> </property> </configuration>

修改hdfs-site.xml

[root@node1 hadoop]# vi /opt/hadoop/etc/hadoop/hdfs-site.xml #原有内容上添加为如下内容： <configuration> <property> <name>dfs.ha.automatic-failover.enabled</name> <value>true</value> </property> </configuration>

2、分发配置文件至node2，node3，node4

3、zookeeper FailerController格式化

[root@node1 ~]# hdfs zkfc -formatZK 2020-01-27 11:26:40,326 INFO ha.ActiveStandbyElector: Successfully created /hadoop-ha/mycluster in ZK

4、namenode节点安装psmisc（ZKFC主机）

[root@node1 ~]#yum install psmisc -y [root@node2 ~]#yum install psmisc -y

5、node2免密登录node2设置

[root@node2 ~]# ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /root/.ssh/id_rsa. Your public key has been saved in /root/.ssh/id_rsa.pub. The key fingerprint is: SHA256:21X44T83NPr3k/FabLoSGZZDCoGck1ncNiowoLJGlr0 root@node2 The key’s randomart image is: +---[RSA 2048]----+ | .. . Boo | | .o o B o + .. | |o+ . o . + +..o | |+. . . . . =+ . | |.. E .S ..+oo | |. o .o o+.| | . . o oX| | . .**| | .++=| +----[SHA256]-----+ [root@node2 ~]# cd ~/.ssh/ [root@node2 .ssh]# ssh-copy-id node1 /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" The authenticity of host ’node1 (192.168.30.11)’ can’t be established. ECDSA key fingerprint is SHA256:/V6z9w2ts2Ei8dgcKAlJCGozcmoeWNSNyctvHWjdoJk. ECDSA key fingerprint is MD5:09:41:c7:ad:2b:65:77:6f:eb:af:77:be:8f:e3:1f:15. Are you sure you want to continue connecting (yes/no)? yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@node1’s password:


Number of key(s) added: 1
Now try logging into the machine, with:   "ssh ’node1’"

and check to make sure that only the key(s) you wanted were added.

[root@node2 .ssh]# ssh node1

6、启动集群

[root@node1 hadoop]# start-dfs.sh

7、验证：

六、ResourceManager HA 配置

1、修改mapred-site.xml

[root@node1 hadoop]# vi /opt/hadoop/etc/hadoop/mapred-site.xml #修改为如下内容 <configuration> <property> <name>mapreduce.framework.name</name> <value>yarn</value> </property> </configuration>

2、修改yarn-site.xml

[root@node1 hadoop]# vi /opt/hadoop/etc/hadoop/yarn-site.xml #修改为如下内容 <configuration>  <property> <name>yarn.nodemanager.aux-services</name> <value>mapreduce_shuffle</value> </property>  <property> <name>yarn.log-aggregation-enable</name> <value>true</value> </property> <property>  <name>yarn.resourcemanager.ha.enabled</name> <value>true</value> </property> <property>  <name>yarn.resourcemanager.cluster-id</name> <value>cl uster1</value> </property> <property>  <name>yarn.resourcemanager.ha.rm-ids</name> <value>rm1,rm2</value> </property> <property>  <name>yarn.resourcemanager.hostname.rm1</name> <value>node1</value> </property> <property>  <name>yarn.resourcemanager.webapp.address.rm1</name> <value>node1:8088</value> </property> <property>  <name>yarn.resourcemanager.hostname.rm2</name> <value>node2</value> </property> <property>  <name>yarn.resourcemanager.webapp.address.rm2</name> <value>node2:8088</value> </property> <property>  <name>yarn.resourcemanager.zk-address</name> <value>node2:2181,node3:2181,node4:2181</value> </property> </configuration>

3、把修改得配置文件分发到node2，node3，node4主机中

[root@node1 hadoop]# cd /opt/hadoop/etc/hadoop/ [root@node1 hadoop]# scp hadoop-env.sh mapred-site.xml yarn-site.xml node2:/`pwd` [root@node1 hadoop]# scp hadoop-env.sh mapred-site.xml yarn-site.xml node3:/`pwd` [root@node1 hadoop]# scp hadoop-env.sh mapred-site.xml yarn-site.xml node4:/`pwd`

4、启动服务