1.1 当前所处位置，及内部文件如下
[root@hadoop1 hadoop-2.7.4]# ll 总用量 116 drwxr-xr-x. 2 20415 101 194 8月 1 2017 bin drwxr-xr-x. 3 20415 101 20 8月 1 2017 etc drwxr-xr-x. 2 20415 101 106 8月 1 2017 include drwxr-xr-x. 3 20415 101 20 8月 1 2017 lib drwxr-xr-x. 2 20415 101 239 8月 1 2017 libexec -rw-r--r--. 1 20415 101 86424 8月 1 2017 LICENSE.txt -rw-r--r--. 1 20415 101 14978 8月 1 2017 NOTICE.txt -rw-r--r--. 1 20415 101 1366 8月 1 2017 README.txt drwxr-xr-x. 2 20415 101 4096 8月 1 2017 sbin drwxr-xr-x. 4 20415 101 31 8月 1 2017 share drwxr-xr-x. 19 20415 101 4096 8月 1 2017 src
1.2 首先查看所有配置文件
# 切换至hadoop内部配置文件所处位置 [root@hadoop1 hadoop-2.7.4]# cd etc/hadoop/ # 查询所有配置文件 [root@hadoop1 hadoop]# ll 总用量 152 -rw-r--r--. 1 20415 101 4436 8月 1 2017 capacity-scheduler.xml -rw-r--r--. 1 20415 101 1335 8月 1 2017 configuration.xsl -rw-r--r--. 1 20415 101 318 8月 1 2017 container-executor.cfg -rw-r--r--. 1 20415 101 774 8月 1 2017 core-site.xml -rw-r--r--. 1 20415 101 3670 8月 1 2017 hadoop-env.cmd -rw-r--r--. 1 20415 101 4224 8月 1 2017 hadoop-env.sh -rw-r--r--. 1 20415 101 2598 8月 1 2017 hadoop-metrics2.properties -rw-r--r--. 1 20415 101 2490 8月 1 2017 hadoop-metrics.properties -rw-r--r--. 1 20415 101 9683 8月 1 2017 hadoop-policy.xml -rw-r--r--. 1 20415 101 775 8月 1 2017 hdfs-site.xml -rw-r--r--. 1 20415 101 1449 8月 1 2017 httpfs-env.sh -rw-r--r--. 1 20415 101 1657 8月 1 2017 httpfs-log4j.properties -rw-r--r--. 1 20415 101 21 8月 1 2017 httpfs-signature.secret -rw-r--r--. 1 20415 101 620 8月 1 2017 httpfs-site.xml -rw-r--r--. 1 20415 101 3518 8月 1 2017 kms-acls.xml -rw-r--r--. 1 20415 101 1527 8月 1 2017 kms-env.sh -rw-r--r--. 1 20415 101 1631 8月 1 2017 kms-log4j.properties -rw-r--r--. 1 20415 101 5540 8月 1 2017 kms-site.xml -rw-r--r--. 1 20415 101 11237 8月 1 2017 log4j.properties -rw-r--r--. 1 20415 101 951 8月 1 2017 mapred-env.cmd -rw-r--r--. 1 20415 101 1383 8月 1 2017 mapred-env.sh -rw-r--r--. 1 20415 101 4113 8月 1 2017 mapred-queues.xml.template -rw-r--r--. 1 20415 101 758 8月 1 2017 mapred-site.xml.template -rw-r--r--. 1 20415 101 10 8月 1 2017 slaves -rw-r--r--. 1 20415 101 2316 8月 1 2017 ssl-client.xml.example -rw-r--r--. 1 20415 101 2697 8月 1 2017 ssl-server.xml.example -rw-r--r--. 1 20415 101 2250 8月 1 2017 yarn-env.cmd -rw-r--r--. 1 20415 101 4567 8月 1 2017 yarn-env.sh -rw-r--r--. 1 20415 101 690 8月 1 2017 yarn-site.xml2. 修改Hadoop配置文件
2.1 采用vim命令进行修改hadoop-env.sh
[root@hadoop1 hadoop]# vim hadoop-env.sh
2.2 修改core-site.xml
fs.defaultFS hdfs://hadoop1:9000 hadoop.tmp.dir /usr/local/hadoop/hadoop-2.7.4/tmp
2.3 修改hdfs-site.xml 3. 初始化文件系统
[root@hadoop1 hadoop]# hdfs namenode -format 22/03/23 12:45:51 INFO namenode.NameNode: STARTUP_MSG: 22/03/23 12:45:51 INFO namenode.NameNode: registered UNIX signal handlers for [TERM, HUP, INT] 22/03/23 12:45:51 INFO namenode.NameNode: createNameNode [-format] Formatting using clusterid: CID-e9ba1e78-c6f2-4c57-a449-74d280c526ee 22/03/23 12:45:52 INFO namenode.FSNamesystem: No KeyProvider found. 22/03/23 12:45:52 INFO namenode.FSNamesystem: fsLock is fair: true 22/03/23 12:45:52 INFO namenode.FSNamesystem: Detailed lock hold time metrics enabled: false 22/03/23 12:45:53 INFO blockmanagement.DatanodeManager: dfs.block.invalidate.limit=1000 22/03/23 12:45:53 INFO blockmanagement.DatanodeManager: dfs.namenode.datanode.registration.ip-hostname-check=true 22/03/23 12:45:53 INFO blockmanagement.BlockManager: dfs.namenode.startup.delay.block.deletion.sec is set to 000:00:00:00.000 22/03/23 12:45:53 INFO blockmanagement.BlockManager: The block deletion will start around 2022 三月 23 12:45:53 22/03/23 12:45:53 INFO util.GSet: Computing capacity for map BlocksMap 22/03/23 12:45:53 INFO util.GSet: VM type = 64-bit 22/03/23 12:45:53 INFO util.GSet: 2.0% max memory 889 MB = 17.8 MB 22/03/23 12:45:53 INFO util.GSet: capacity = 2^21 = 2097152 entries 22/03/23 12:45:53 INFO blockmanagement.BlockManager: dfs.block.access.token.enable=false 22/03/23 12:45:53 INFO blockmanagement.BlockManager: defaultReplication = 1 22/03/23 12:45:53 INFO blockmanagement.BlockManager: maxReplication = 512 22/03/23 12:45:53 INFO blockmanagement.BlockManager: minReplication = 1 22/03/23 12:45:53 INFO blockmanagement.BlockManager: maxReplicationStreams = 2 22/03/23 12:45:53 INFO blockmanagement.BlockManager: replicationRecheckInterval = 3000 22/03/23 12:45:53 INFO blockmanagement.BlockManager: encryptDataTransfer = false 22/03/23 12:45:53 INFO blockmanagement.BlockManager: maxNumBlocksToLog = 1000 22/03/23 12:45:53 INFO namenode.FSNamesystem: fsOwner = root (auth:SIMPLE) 22/03/23 12:45:53 INFO namenode.FSNamesystem: supergroup = supergroup 22/03/23 12:45:53 INFO namenode.FSNamesystem: isPermissionEnabled = true 22/03/23 12:45:53 INFO namenode.FSNamesystem: HA Enabled: false 22/03/23 12:45:53 INFO namenode.FSNamesystem: Append Enabled: true 22/03/23 12:45:55 INFO util.GSet: Computing capacity for map INodeMap 22/03/23 12:45:55 INFO util.GSet: VM type = 64-bit 22/03/23 12:45:55 INFO util.GSet: 1.0% max memory 889 MB = 8.9 MB 22/03/23 12:45:55 INFO util.GSet: capacity = 2^20 = 1048576 entries 22/03/23 12:45:55 INFO namenode.FSDirectory: ACLs enabled? false 22/03/23 12:45:55 INFO namenode.FSDirectory: XAttrs enabled? true 22/03/23 12:45:55 INFO namenode.FSDirectory: Maximum size of an xattr: 16384 22/03/23 12:45:55 INFO namenode.NameNode: Caching file names occuring more than 10 times 22/03/23 12:45:55 INFO util.GSet: Computing capacity for map cachedBlocks 22/03/23 12:45:55 INFO util.GSet: VM type = 64-bit 22/03/23 12:45:55 INFO util.GSet: 0.25% max memory 889 MB = 2.2 MB 22/03/23 12:45:55 INFO util.GSet: capacity = 2^18 = 262144 entries 22/03/23 12:45:55 INFO namenode.FSNamesystem: dfs.namenode.safemode.threshold-pct = 0.9990000128746033 22/03/23 12:45:55 INFO namenode.FSNamesystem: dfs.namenode.safemode.min.datanodes = 0 22/03/23 12:45:55 INFO namenode.FSNamesystem: dfs.namenode.safemode.extension = 30000 22/03/23 12:45:55 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.window.num.buckets = 10 22/03/23 12:45:55 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.num.users = 10 22/03/23 12:45:55 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.windows.minutes = 1,5,25 22/03/23 12:45:55 INFO namenode.FSNamesystem: Retry cache on namenode is enabled 22/03/23 12:45:55 INFO namenode.FSNamesystem: Retry cache will use 0.03 of total heap and retry cache entry expiry time is 600000 millis 22/03/23 12:45:55 INFO util.GSet: Computing capacity for map NameNodeRetryCache 22/03/23 12:45:55 INFO util.GSet: VM type = 64-bit 22/03/23 12:45:55 INFO util.GSet: 0.029999999329447746% max memory 889 MB = 273.1 KB 22/03/23 12:45:55 INFO util.GSet: capacity = 2^15 = 32768 entries 22/03/23 12:45:56 INFO namenode.FSImage: Allocated new BlockPoolId: BP-761487052-192.168.101.166-1648010756451 22/03/23 12:45:56 INFO common.Storage: Storage directory /usr/local/hadoop/hadoop-2.7.4/tmp/dfs/name has been successfully formatted. 22/03/23 12:45:56 INFO namenode.FSImageFormatProtobuf: Saving image file /usr/local/hadoop/hadoop-2.7.4/tmp/dfs/name/current/fsimage.ckpt_0000000000000000000 using no compression 22/03/23 12:45:56 INFO namenode.FSImageFormatProtobuf: Image file /usr/local/hadoop/hadoop-2.7.4/tmp/dfs/name/current/fsimage.ckpt_0000000000000000000 of size 321 bytes saved in 0 seconds. 22/03/23 12:45:56 INFO namenode.NNStorageRetentionManager: Going to retain 1 images with txid >= 0 22/03/23 12:45:56 INFO util.ExitUtil: Exiting with status 0 22/03/23 12:45:56 INFO namenode.NameNode: SHUTDOWN_MSG:4. 启动HDFS
4.1文件系统初始化成功,启动hdfs
[root@hadoop1 hadoop]# start-dfs.sh Starting namenodes on [hadoop1] The authenticity of host 'hadoop1 (fe80::60f5:7b31:bf63:ccef%ens33)' can't be established. ECDSA key fingerprint is SHA256:dLMHzLDwMPEHWjgXb+5N746rIfizy+vrHOaOWh3TsOE. ECDSA key fingerprint is MD5:5b:3a:cc:9e:2c:8f:37:3c:18:2c:cd:15:c9:a1:f0:11. Are you sure you want to continue connecting (yes/no)? yes hadoop1: Warning: Permanently added 'hadoop1,fe80::60f5:7b31:bf63:ccef%ens33' (ECDSA) to the list of known hosts. root@hadoop1's password: hadoop1: starting namenode, logging to /usr/local/hadoop/hadoop-2.7.4/logs/hadoop-root-namenode-hadoop1.out The authenticity of host 'localhost (::1)' can't be established. ECDSA key fingerprint is SHA256:dLMHzLDwMPEHWjgXb+5N746rIfizy+vrHOaOWh3TsOE. ECDSA key fingerprint is MD5:5b:3a:cc:9e:2c:8f:37:3c:18:2c:cd:15:c9:a1:f0:11. Are you sure you want to continue connecting (yes/no)? yes localhost: Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts. root@localhost's password: localhost: starting datanode, logging to /usr/local/hadoop/hadoop-2.7.4/logs/hadoop-root-datanode-hadoop1.out Starting secondary namenodes [0.0.0.0] The authenticity of host '0.0.0.0 (0.0.0.0)' can't be established. ECDSA key fingerprint is SHA256:dLMHzLDwMPEHWjgXb+5N746rIfizy+vrHOaOWh3TsOE. ECDSA key fingerprint is MD5:5b:3a:cc:9e:2c:8f:37:3c:18:2c:cd:15:c9:a1:f0:11. Are you sure you want to continue connecting (yes/no)? yes 0.0.0.0: Warning: Permanently added '0.0.0.0' (ECDSA) to the list of known hosts. root@0.0.0.0's password: 0.0.0.0: starting secondarynamenode, logging to /usr/local/hadoop/hadoop-2.7.4/logs/hadoop-root-secondarynamenode-hadoop1.out
4.2 启动之后，通过jps指令查询所有的java进程
[root@hadoop1 hadoop]# jps 70164 SecondaryNameNode 69526 NameNode 69883 DataNode 71691 Jps
当下，在VMWare内浏览器中进行访问web页面(http://hadoop1:50070)来查看Hadoop的信息
在执行启动hdfs时，需要多次输入密码，带来繁琐，可采用免密方式登录，具体配置可以查看。
作者： 杨校
出处： https://mryang.blog.csdn.net
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