Hadoop+HBase+Zookeeper安装摘要

Hadoop安装摘要

1.安装hadoop
2.修改配置文件

• 修改hadoop-env.sh文件

• export JAVA_HOME=${JAVA_HOME} 修改为-> export JAVA_HOME=/usr/local/jdk1.8.0_161/

• 修改core-site.xml文件

<configuration>
<property>
<name>fs.defaultFs</name>  默认文件系统是HDFS
<value>hdfs://localhost:9000/</value>  uri  监听端口号在9000
</property>

<property>
<name>hadoop.tmp.dir</name>     临时数据存储地址
<value>/root/hadoop_temp</value>  
</property>
</configuration>

• 配置环境变量，使用命令：vi /etc/profile

export JAVA_HOME=/usr/local/jdk1.8.0_161
export HADOOP_HOME=/usr/local/hadoop-2.6.4
export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin:

3.初始化namenode节点，再启动

• 原因：namenode运行的机器，数据目录来记录其信息，生成那个记录信息的目录就是初始化的操作。
• 命令：bin/hdfs namenode -format，在笔者的一次执行中，效果如下：

[root@littlelawson bin]# ./hdfs namenode -format
18/06/19 09:52:55 INFO namenode.NameNode: STARTUP_MSG: 
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = littlelawson/192.168.211.3#主机名
STARTUP_MSG:   args = [-format]#命令参数
STARTUP_MSG:   version = 2.6.4 #当前hadoop的版本
STARTUP_MSG:   classpath = /usr/local/hadoop-2.6.4/etc/hadoop:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/apacheds-i18n-2.0.0-M15.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-logging-1.1.3.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-math3-3.1.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-collections-3.2.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-lang-2.6.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/stax-api-1.0-2.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/xz-1.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/servlet-api-2.5.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/apacheds-kerberos-codec-2.0.0-M15.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/api-util-1.0.0-M20.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jetty-6.1.26.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jasper-compiler-5.5.23.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/avro-1.7.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/netty-3.6.2.Final.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/activation-1.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jsch-0.1.42.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jersey-core-1.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jettison-1.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/htrace-core-3.0.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jaxb-impl-2.2.3-1.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jackson-mapper-asl-1.9.13.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jersey-server-1.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/mockito-all-1.8.5.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/log4j-1.2.17.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-net-3.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/java-xmlbuilder-0.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-cli-1.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jasper-runtime-5.5.23.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-httpclient-3.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-beanutils-core-1.8.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/gson-2.2.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jersey-json-1.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/httpclient-4.2.5.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jsp-api-2.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-digester-1.8.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jetty-util-6.1.26.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jaxb-api-2.2.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jackson-jaxrs-1.9.13.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-compress-1.4.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-codec-1.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/guava-11.0.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jackson-xc-1.9.13.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jets3t-0.9.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/xmlenc-0.52.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-configuration-1.6.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-beanutils-1.7.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/hamcrest-core-1.3.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/hadoop-annotations-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/asm-3.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-el-1.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/junit-4.11.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/paranamer-2.3.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/commons-io-2.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/zookeeper-3.4.6.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jackson-core-asl-1.9.13.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/curator-client-2.6.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/curator-recipes-2.6.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/jsr305-1.3.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/httpcore-4.2.5.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/curator-framework-2.6.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/hadoop-auth-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/slf4j-api-1.7.5.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/lib/api-asn1-api-1.0.0-M20.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/hadoop-nfs-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/hadoop-common-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/common/hadoop-common-2.6.4-tests.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/commons-logging-1.1.3.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/xml-apis-1.3.04.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/commons-lang-2.6.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/servlet-api-2.5.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/jetty-6.1.26.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/netty-3.6.2.Final.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/commons-daemon-1.0.13.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/jersey-core-1.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/htrace-core-3.0.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/jackson-mapper-asl-1.9.13.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/jersey-server-1.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/xercesImpl-2.9.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/log4j-1.2.17.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/commons-cli-1.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/jasper-runtime-5.5.23.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/jsp-api-2.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/jetty-util-6.1.26.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/commons-codec-1.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/guava-11.0.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/xmlenc-0.52.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/asm-3.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/commons-el-1.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/commons-io-2.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/jackson-core-asl-1.9.13.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/lib/jsr305-1.3.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/hadoop-hdfs-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/hadoop-hdfs-2.6.4-tests.jar:/usr/local/hadoop-2.6.4/share/hadoop/hdfs/hadoop-hdfs-nfs-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/commons-logging-1.1.3.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jline-0.9.94.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/commons-collections-3.2.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jersey-guice-1.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/commons-lang-2.6.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/javax.inject-1.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/leveldbjni-all-1.8.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/stax-api-1.0-2.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/xz-1.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/servlet-api-2.5.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jetty-6.1.26.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/netty-3.6.2.Final.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/activation-1.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jersey-core-1.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/guice-servlet-3.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jettison-1.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jaxb-impl-2.2.3-1.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jackson-mapper-asl-1.9.13.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jersey-server-1.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/log4j-1.2.17.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/commons-cli-1.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/commons-httpclient-3.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jersey-json-1.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/aopalliance-1.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jetty-util-6.1.26.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jaxb-api-2.2.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jackson-jaxrs-1.9.13.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/commons-compress-1.4.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/commons-codec-1.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/guava-11.0.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jackson-xc-1.9.13.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/asm-3.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/guice-3.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/commons-io-2.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/zookeeper-3.4.6.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jackson-core-asl-1.9.13.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jersey-client-1.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/lib/jsr305-1.3.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/hadoop-yarn-common-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/hadoop-yarn-server-applicationhistoryservice-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/hadoop-yarn-registry-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/hadoop-yarn-server-nodemanager-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/hadoop-yarn-server-common-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/hadoop-yarn-server-tests-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/hadoop-yarn-client-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/hadoop-yarn-api-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/hadoop-yarn-applications-distributedshell-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/hadoop-yarn-server-web-proxy-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/hadoop-yarn-applications-unmanaged-am-launcher-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/yarn/hadoop-yarn-server-resourcemanager-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/jersey-guice-1.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/javax.inject-1.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/leveldbjni-all-1.8.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/xz-1.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/avro-1.7.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/netty-3.6.2.Final.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/jersey-core-1.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/guice-servlet-3.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/jackson-mapper-asl-1.9.13.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/jersey-server-1.9.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/log4j-1.2.17.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/aopalliance-1.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/commons-compress-1.4.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/protobuf-java-2.5.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/hamcrest-core-1.3.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/hadoop-annotations-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/asm-3.2.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/junit-4.11.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/paranamer-2.3.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/guice-3.0.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/commons-io-2.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/jackson-core-asl-1.9.13.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/lib/snappy-java-1.0.4.1.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-plugins-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.6.4-tests.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/hadoop-mapreduce-client-common-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/hadoop-mapreduce-client-app-2.6.4.jar:/usr/local/hadoop-2.6.4/share/hadoop/mapreduce/hadoop-mapreduce-client-shuffle-2.6.4.jar:/usr/local/hadoop-2.6.4/contrib/capacity-scheduler/*.jar
STARTUP_MSG:   build = Unknown -r Unknown; compiled by 'hadoop' on 2016-03-08T03:44Z
STARTUP_MSG:   java = 1.8.0_161#jdk版本号
************************************************************/
18/06/19 09:52:55 INFO namenode.NameNode: registered UNIX signal handlers for [TERM, HUP, INT]
18/06/19 09:52:55 INFO namenode.NameNode: createNameNode [-format]
Formatting using clusterid: CID-9ce9fcd6-5d0b-4d43-963e-00de21b07db2
18/06/19 09:52:56 INFO namenode.FSNamesystem: No KeyProvider found.
18/06/19 09:52:56 INFO namenode.FSNamesystem: fsLock is fair:true
18/06/19 09:52:56 INFO blockmanagement.DatanodeManager: dfs.block.invalidate.limit=1000
18/06/19 09:52:56 INFO blockmanagement.DatanodeManager: dfs.namenode.datanode.registration.ip-hostname-check=true
18/06/19 09:52:56 INFO blockmanagement.BlockManager: dfs.namenode.startup.delay.block.deletion.sec is set to 000:00:00:00.000
18/06/19 09:52:56 INFO blockmanagement.BlockManager: The block deletion will start around 2018 Jun 19 09:52:56
18/06/19 09:52:56 INFO util.GSet: Computing capacity for map BlocksMap
18/06/19 09:52:56 INFO util.GSet: VM type       = 64-bit
18/06/19 09:52:56 INFO util.GSet: 2.0% max memory 889 MB = 17.8 MB
18/06/19 09:52:56 INFO util.GSet: capacity      = 2^21 = 2097152 entries
18/06/19 09:52:56 INFO blockmanagement.BlockManager: dfs.block.access.token.enable=false
18/06/19 09:52:56 INFO blockmanagement.BlockManager: defaultReplication         = 3
18/06/19 09:52:56 INFO blockmanagement.BlockManager: maxReplication             = 512
18/06/19 09:52:56 INFO blockmanagement.BlockManager: minReplication             = 1
18/06/19 09:52:56 INFO blockmanagement.BlockManager: maxReplicationStreams      = 2
18/06/19 09:52:56 INFO blockmanagement.BlockManager: replicationRecheckInterval = 3000
18/06/19 09:52:56 INFO blockmanagement.BlockManager: encryptDataTransfer        = false
18/06/19 09:52:56 INFO blockmanagement.BlockManager: maxNumBlocksToLog          = 1000
18/06/19 09:52:56 INFO namenode.FSNamesystem: fsOwner             = root (auth:SIMPLE)
18/06/19 09:52:56 INFO namenode.FSNamesystem: supergroup          = supergroup
18/06/19 09:52:56 INFO namenode.FSNamesystem: isPermissionEnabled = true
18/06/19 09:52:56 INFO namenode.FSNamesystem: HA Enabled: false
18/06/19 09:52:56 INFO namenode.FSNamesystem: Append Enabled: true
18/06/19 09:52:57 INFO util.GSet: Computing capacity for map INodeMap
18/06/19 09:52:57 INFO util.GSet: VM type       = 64-bit
18/06/19 09:52:57 INFO util.GSet: 1.0% max memory 889 MB = 8.9 MB
18/06/19 09:52:57 INFO util.GSet: capacity      = 2^20 = 1048576 entries
18/06/19 09:52:57 INFO namenode.NameNode: Caching file names occuring more than 10 times
18/06/19 09:52:57 INFO util.GSet: Computing capacity for map cachedBlocks
18/06/19 09:52:57 INFO util.GSet: VM type       = 64-bit
18/06/19 09:52:57 INFO util.GSet: 0.25% max memory 889 MB = 2.2 MB
18/06/19 09:52:57 INFO util.GSet: capacity      = 2^18 = 262144 entries
18/06/19 09:52:57 INFO namenode.FSNamesystem: dfs.namenode.safemode.threshold-pct = 0.9990000128746033
18/06/19 09:52:57 INFO namenode.FSNamesystem: dfs.namenode.safemode.min.datanodes = 0
18/06/19 09:52:57 INFO namenode.FSNamesystem: dfs.namenode.safemode.extension     = 30000
18/06/19 09:52:57 INFO namenode.FSNamesystem: Retry cache on namenode is enabled
18/06/19 09:52:57 INFO namenode.FSNamesystem: Retry cache will use 0.03 of total heap and retry cache entry expiry time is 600000 millis
18/06/19 09:52:57 INFO util.GSet: Computing capacity for map NameNodeRetryCache
18/06/19 09:52:57 INFO util.GSet: VM type       = 64-bit
18/06/19 09:52:57 INFO util.GSet: 0.029999999329447746% max memory 889 MB = 273.1 KB
18/06/19 09:52:57 INFO util.GSet: capacity      = 2^15 = 32768 entries
18/06/19 09:52:57 INFO namenode.NNConf: ACLs enabled? false
18/06/19 09:52:57 INFO namenode.NNConf: XAttrs enabled? true
18/06/19 09:52:57 INFO namenode.NNConf: Maximum size of an xattr: 16384
Re-format filesystem in Storage Directory /root/hadoop_temp/dfs/name ? (Y or N) y
18/06/19 09:53:04 INFO namenode.FSImage: Allocated new BlockPoolId: BP-79549927-192.168.211.3-1529427184817
18/06/19 09:53:05 INFO common.Storage: Storage directory /root/hadoop_temp/dfs/name has been successfully formatted.
18/06/19 09:53:05 INFO namenode.NNStorageRetentionManager: Going to retain 1 images with txid >= 0
18/06/19 09:53:05 INFO util.ExitUtil: Exiting with status 0#这里是0的话，表示格式化成功
18/06/19 09:53:05 INFO namenode.NameNode: SHUTDOWN_MSG: 
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at littlelawson/192.168.211.3
************************************************************/

修改配置文件

[root@littlelawson hadoop]# cat core-site.xml
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
    <name>fs.defaultFS</name>
    <value>hdfs://littlelawson:9000/</value>
</property>
<property>
    <name>hadoop.tmp.dir</name>
    <value>/root/hadoop_temp</value>  
</property>
</configuration>

[root@littlelawson hadoop]# cat hdfs-site.xml
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
    <property>
        <name>dfs.permissions.enabled</name>
        <value>false</value>
    </property>
    <property>
            <name>dfs.replication</name>
            <value>3</value>
    </property>
</configuration>

[root@littlelawson hadoop]# cat core-site.xml 
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
    <name>fs.defaultFS</name>
    <value>hdfs://littlelawson:9000/</value>
</property>
<property>
    <name>hadoop.tmp.dir</name>
    <value>/root/hadoop_temp</value>  
</property>
</configuration>

[root@littlelawson hadoop]# cat slaves
server4
server5
server6

[root@littlelawson hadoop]# cat yarn-site.xml
<?xml version="1.0"?>
<configuration>
<!-- Site specific YARN configuration properties -->
    <property>
          <name>yarn.nodemanager.aux-services</name>
          <value>mapreduce_shuffle</value>
    </property>
      <property>
          <name>yarn.resourcemanager.hostname</name>
          <value>master</value>
      </property>
</configuration>

Hadoop各个集群模式区别

1.单机模式

Hadoop默认模式为非分布式模式【即单机模式】，无需进行其他配置即可运行。

2.伪分布模式

Hadoop可以在单节点上以伪分布式的方式运行，Hadoop进程以分离的Java 进程来运行，节点既作为 NameNode 也作为 DataNode，同时，读取的是HDFS 中的文件。

3.完全分布式

不同的主机扮演着不同的角色。
- littlelawson主机【namenode】

[root@littlelawson conf]# jps
6435 SecondaryNameNode
6253 NameNode
26975 Jps
[root@littlelawson conf]# 

• server4主机【datanode】

[root@server4 openldap]# jps
2354 DataNode
12415 Jps

• server5主机【datanode】

[root@server5 conf.d]# jps
3285 DataNode
13269 Jps

• server6主机【datanode】

[root@localhost conf.d]# jps
2634 DataNode
11994 Jps
[root@localhost conf.d]#

—————————————————–[2018 07 11]————————————————————–

• 启动hadoop集群失败【主要是启动datanode失败】

 Initialization failed for Block pool <registering> (Datanode Uuid unassigned) service to server4/192.168.211.4:9000. Exiting.
java.io.IOException: All specified directories are failed to load.
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:478)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:1338)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:1304)
        at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:314)
        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:226)
        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:867)
        at java.lang.Thread.run(Thread.java:748)

可以看到这是因为datanode未能正常启动，主要的原因就是DataNode的id分配不对。删除其id，重新格式化生成即可。

• zookeeper集群启动失败

2018-07-13 11:17:55,558 [myid:4] - WARN  [WorkerSender[myid=4]:QuorumCnxManager@584] - Cannot open channel to 5 at election address server5/192.168.211.5:3888
java.net.ConnectException: Connection refused (Connection refused)
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:558)
    at org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:534)
    at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:454)
    at org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:435)
    at java.lang.Thread.run(Thread.java:748)

zookeeper安装注意事项：

• 1)每个zookeeper节点需要在conf/zoo.cfg配置的dataDir路径下配置myid。这个id一定要和后面配置的server.num这个num一致
• 2)启动zookeeper需要到每台机器上启动。而不是在一个主机器启动就可以了。
• 3)验证每个节点是否启动【使用jps命令】

[root@server4 bin]# ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.11/bin/../conf/zoo.cfg
Mode: leader
[root@server4 bin]# 

[root@server5 bin]# ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.11/bin/../conf/zoo.cfg
Mode: follower
[root@server5 bin]# 

[root@server6 bin]# ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.11/bin/../conf/zoo.cfg
Mode: follower
[root@server6 bin]# 

如果本来是一个zookeeper集群，但是只启动了一个节点，使用zkServer.sh status命令的时候，就会显示出Error contacting service.It is probably not running.这是因为整个集群没有启动起来。

[root@server4 zookeeper-3.4.11]# bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper-3.4.11/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.

总结

• 1.各个节点的jdk版本最后【一定】要一致！

———————————–20180720更新————————————————–

• zookeeper中创建znode是什么意思？【待完善】

• 启动HBASE之后创建表，遇到以下错误：【待完善】
  ERROR: The node /hbase is not in ZooKeeper. It should have been written by the master. Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.