• Hadoop大数据应用：HDFS 集群节点扩容

    目录

     一、实验

    1.环境

    2.HDFS 集群节点扩容

    二、问题

    1.rsync 同步报错

     一、实验

    1.环境

    （1）主机

    表1  主机

    主机架构软件版本IP备注
    hadoop

    NameNode （已部署）

    SecondaryNameNode （已部署）

    ResourceManager（已部署）

    hadoop

    		2.7.7192.168.204.50

    node01

    DataNode（已部署）

    NodeManager（已部署）

    hadoop

    		2.7.7192.168.204.51
    node02

    DataNode（已部署）

    NodeManager（已部署）

    hadoop

    		2.7.7192.168.204.52
    node03

    DataNode（已部署）

    NodeManager（已部署）

    hadoop

    		2.7.7192.168.204.53
    node04

    DataNode

    hadoop

    		2.7.7192.168.204.54

    （2）查看jps

    hadoop节点

    [root@hadoop hadoop]# jps

    node01节点

    node02节点

    node03节点

    （3） 查看节点

    1. [root@hadoop hadoop]# ./bin/yarn node -list
    2. 24/03/14 13:40:21 INFO client.RMProxy: Connecting to ResourceManager at hadoop/192.168.204.50:8032
    3. Total Nodes:3
    4.          Node-Id             Node-State Node-Http-Address       Number-of-Running-Containers
    5.     node01:40551                RUNNING       node01:8042                                  0
    6.     node02:46073                RUNNING       node02:8042                                  0
    7.     node03:40601                RUNNING       node03:8042                                  0

    2.HDFS 集群节点扩容

    （1）查看IP

    地址为192.168.204.54

    [root@localhost ~]# ip addr

     （2）安全机制

    查看

    [root@localhost ~]# sestatus

    关闭

    1. [root@localhost ~]# vim /etc/selinux/config
    2. ……
    3. SELINUX=disabled
    4. ……

    再次查看（需要reboot重启）

    [root@localhost ~]# sestatus

    （3）防火墙

    关闭

    1. [root@localhost ~]# systemctl stop firewalld
    2. [root@localhost ~]# systemctl mask firewalld

    （4）安装java

    [root@localhost ~]# yum install -y java-1.8.0-openjdk-devel.x86_64

    查看

    [root@localhost ~]# jps

     （5）修改主机名

    1. [root@localhost ~]# hostnamectl set-hostname node04
    2. [root@localhost ~]# bash

    （6）添加免密登录

    1. [root@hadoop ~]# cd /root/.ssh/
    2. [root@hadoop .ssh]# ls
    3. authorized_keys  id_rsa  id_rsa.pub  known_hosts
    4. [root@hadoop .ssh]# ssh-copy-id -i id_rsa.pub 192.168.204.54

    验证：

    [root@hadoop .ssh]# ssh 192.168.204.54

     （7）域名主机名(hadoop节点)

    1. [root@hadoop ~]# vim /etc/hosts
    2. ……
    3. 192.168.205.50 hadoop
    4. 192.168.205.51 node01
    5. 192.168.205.52 node02
    6. 192.168.205.53 node03
    7. 192.168.204.54 node04

    （8）同步域名配置文件

    1. [root@hadoop ~]# rsync -av /etc/hosts node01:/etc/
    2. sending incremental file list
    3. hosts
    4.  
    5. sent 359 bytes  received 41 bytes  266.67 bytes/sec
    6. total size is 269  speedup is 0.67
    7. [root@hadoop ~]# rsync -av /etc/hosts node02:/etc/
    8. sending incremental file list
    9. hosts
    10.  
    11. sent 359 bytes  received 41 bytes  800.00 bytes/sec
    12. total size is 269  speedup is 0.67
    13. [root@hadoop ~]# rsync -av /etc/hosts node03:/etc/
    14. sending incremental file list
    15. hosts
    16.  
    17. sent 359 bytes  received 41 bytes  800.00 bytes/sec
    18. total size is 269  speedup is 0.67
    19. [root@hadoop ~]# rsync -av /etc/hosts node04:/etc/
    20. Warning: Permanently added 'node04' (ECDSA) to the list of known hosts.
    21. sending incremental file list
    22. hosts
    23.  
    24. sent 359 bytes  received 41 bytes  266.67 bytes/sec
    25. total size is 269  speedup is 0.67

    （9）同步Hadoop文件

    [root@hadoop ~]# rsync -aXSH --delete /usr/local/hadoop node04:/usr/local/

    (10) 清除日志（node04节点）

    1. [root@node04 ~]# cd /usr/local/hadoop/
    2. [root@node04 hadoop]# ls
    3. bin  etc  include  lib  libexec  LICENSE.txt  logs  NOTICE.txt  README.txt  sbin  share
    4. [root@node04 hadoop]# cd logs/
    5. [root@node04 logs]# ls
    6. hadoop-root-namenode-hadoop.log    hadoop-root-secondarynamenode-hadoop.log    SecurityAuth-root.audit
    7. hadoop-root-namenode-hadoop.out    hadoop-root-secondarynamenode-hadoop.out    yarn-root-resourcemanager-hadoop.log
    8. hadoop-root-namenode-hadoop.out.1  hadoop-root-secondarynamenode-hadoop.out.1  yarn-root-resourcemanager-hadoop.out
    9. [root@node04 logs]# rm -f *
    10. [root@node04 logs]# ls

    （11）查看slaves  (hadoop节点)

    1. [root@hadoop ~]# cd /usr/local/hadoop/etc/hadoop/
    2. [root@hadoop hadoop]# cat slaves

    （12）添加slaves

    1.  [root@hadoop hadoop]# vim slaves
    2.   node01
    3.   node02
    4.   node03
    5.   node04

    （13）同步配置到所有主机

    1. [root@hadoop hadoop]# rsync -aXSH --delete /usr/local/hadoop/etc node01:/usr/local/hadoop/
    2. [root@hadoop hadoop]# rsync -aXSH --delete /usr/local/hadoop/etc node02:/usr/local/hadoop/
    3. [root@hadoop hadoop]# rsync -aXSH --delete /usr/local/hadoop/etc node03:/usr/local/hadoop/
    4. [root@hadoop hadoop]# rsync -aXSH --delete /usr/local/hadoop/etc node04:/usr/local/hadoop/

    （14）启动服务 （node04节点）

    [root@node04 hadoop]# ./sbin/hadoop-daemon.sh start datanode

    查看jps

    (15) 验证 （hadoop节点）

    查看报告，Live datanodes 显示节点为4个。

    1. [root@hadoop hadoop]# ./bin/hdfs dfsadmin -report
    2. Configured Capacity: 822126559232 (765.67 GB)
    3. Present Capacity: 798787727360 (743.93 GB)
    4. DFS Remaining: 798786990080 (743.93 GB)
    5. DFS Used: 737280 (720 KB)
    6. DFS Used%: 0.00%
    7. Under replicated blocks: 0
    8. Blocks with corrupt replicas: 0
    9. Missing blocks: 0
    10. Missing blocks (with replication factor 1): 0
    11.  
    12. -------------------------------------------------
    13. Live datanodes (4):
    14.  
    15. Name: 192.168.204.54:50010 (node04)
    16. Hostname: node04
    17. Decommission Status : Normal
    18. Configured Capacity: 205531639808 (191.42 GB)
    19. DFS Used: 4096 (4 KB)
    20. Non DFS Used: 5658746880 (5.27 GB)
    21. DFS Remaining: 199872888832 (186.15 GB)
    22. DFS Used%: 0.00%
    23. DFS Remaining%: 97.25%
    24. Configured Cache Capacity: 0 (0 B)
    25. Cache Used: 0 (0 B)
    26. Cache Remaining: 0 (0 B)
    27. Cache Used%: 100.00%
    28. Cache Remaining%: 0.00%
    29. Xceivers: 1
    30. Last contact: Thu Mar 14 15:00:23 CST 2024
    31.  
    32.  
    33. Name: 192.168.204.53:50010 (node03)
    34. Hostname: node03
    35. Decommission Status : Normal
    36. Configured Capacity: 205531639808 (191.42 GB)
    37. DFS Used: 266240 (260 KB)
    38. Non DFS Used: 5621547008 (5.24 GB)
    39. DFS Remaining: 199909826560 (186.18 GB)
    40. DFS Used%: 0.00%
    41. DFS Remaining%: 97.26%
    42. Configured Cache Capacity: 0 (0 B)
    43. Cache Used: 0 (0 B)
    44. Cache Remaining: 0 (0 B)
    45. Cache Used%: 100.00%
    46. Cache Remaining%: 0.00%
    47. Xceivers: 1
    48. Last contact: Thu Mar 14 15:00:24 CST 2024
    49.  
    50.  
    51. Name: 192.168.204.51:50010 (node01)
    52. Hostname: node01
    53. Decommission Status : Normal
    54. Configured Capacity: 205531639808 (191.42 GB)
    55. DFS Used: 180224 (176 KB)
    56. Non DFS Used: 6029209600 (5.62 GB)
    57. DFS Remaining: 199502249984 (185.80 GB)
    58. DFS Used%: 0.00%
    59. DFS Remaining%: 97.07%
    60. Configured Cache Capacity: 0 (0 B)
    61. Cache Used: 0 (0 B)
    62. Cache Remaining: 0 (0 B)
    63. Cache Used%: 100.00%
    64. Cache Remaining%: 0.00%
    65. Xceivers: 1
    66. Last contact: Thu Mar 14 15:00:22 CST 2024
    67.  
    68.  
    69. Name: 192.168.204.52:50010 (node02)
    70. Hostname: node02
    71. Decommission Status : Normal
    72. Configured Capacity: 205531639808 (191.42 GB)
    73. DFS Used: 286720 (280 KB)
    74. Non DFS Used: 6029328384 (5.62 GB)
    75. DFS Remaining: 199502024704 (185.80 GB)
    76. DFS Used%: 0.00%
    77. DFS Remaining%: 97.07%
    78. Configured Cache Capacity: 0 (0 B)
    79. Cache Used: 0 (0 B)
    80. Cache Remaining: 0 (0 B)
    81. Cache Used%: 100.00%
    82. Cache Remaining%: 0.00%
    83. Xceivers: 1
    84. Last contact: Thu Mar 14 15:00:25 CST 2024

    （16）查看命令

    设置带宽命令为 -setBalancerBandwidth

    1. [root@hadoop hadoop]# ./bin/hdfs dfsadmin
    2. Usage: hdfs dfsadmin
    3. Note: Administrative commands can only be run as the HDFS superuser.
    4.         [-report [-live] [-dead] [-decommissioning]]
    5.         [-safemode wait>]
    6.         [-saveNamespace]
    7.         [-rollEdits]
    8.         [-restoreFailedStorage true|false|check]
    9.         [-refreshNodes]
    10.         [-setQuota  <dirname>...<dirname>]
    11.         [-clrQuota <dirname>...<dirname>]
    12.         [-setSpaceQuota  [-storageType ] <dirname>...<dirname>]
    13.         [-clrSpaceQuota [-storageType ] <dirname>...<dirname>]
    14.         [-finalizeUpgrade]
    15.         [-rollingUpgrade []]
    16.         [-refreshServiceAcl]
    17.         [-refreshUserToGroupsMappings]
    18.         [-refreshSuperUserGroupsConfiguration]
    19.         [-refreshCallQueue]
    20.         [-refresh   [arg1..argn]
    21.         [-reconfig   ]
    22.         [-printTopology]
    23.         [-refreshNamenodes datanode_host:ipc_port]
    24.         [-deleteBlockPool datanode_host:ipc_port blockpoolId [force]]
    25.         [-setBalancerBandwidth in bytes per second>]
    26.         [-fetchImage <local directory>]
    27.         [-allowSnapshot ]
    28.         [-disallowSnapshot ]
    29.         [-shutdownDatanode  [upgrade]]
    30.         [-getDatanodeInfo ]
    31.         [-metasave filename]
    32.         [-triggerBlockReport [-incremental] ]
    33.         [-help [cmd]]
    34.  
    35. Generic options supported are
    36. -conf      specify an application configuration file
    37. -D             use value for given property
    38. -fs <local|namenode:port>      specify a namenode
    39. -jt <local|resourcemanager:port>    specify a ResourceManager
    40. -files     specify comma separated files to be copied to the map reduce cluster
    41. -libjars     specify comma separated jar files to include in the classpath.
    42. -archives     specify comma separated archives to be unarchived on the compute machines.
    43.  
    44. The general command line syntax is
    45. bin/hadoop command [genericOptions] [commandOptions]

    （17）设置带宽平衡数据

    000为KB，000000为MB，

    500+000000 为500MB

    [root@hadoop hadoop]# ./bin/hdfs dfsadmin -setBalancerBandwidth 500000000

    执行脚本

    [root@hadoop hadoop]# ./sbin/start-balancer.sh

    （18）查看状态

    DFS Used 为使用情况

    1. [root@hadoop hadoop]# ./bin/hdfs dfsadmin -report
    2. Configured Capacity: 822126559232 (765.67 GB)
    3. Present Capacity: 798788423680 (743.93 GB)
    4. DFS Remaining: 798787682304 (743.93 GB)
    5. DFS Used: 741376 (724 KB)
    6. DFS Used%: 0.00%
    7. Under replicated blocks: 0
    8. Blocks with corrupt replicas: 0
    9. Missing blocks: 0
    10. Missing blocks (with replication factor 1): 0
    11.  
    12. -------------------------------------------------
    13. Live datanodes (4):
    14.  
    15. Name: 192.168.204.54:50010 (node04)
    16. Hostname: node04
    17. Decommission Status : Normal
    18. Configured Capacity: 205531639808 (191.42 GB)
    19. DFS Used: 8192 (8 KB)
    20. Non DFS Used: 5658730496 (5.27 GB)
    21. DFS Remaining: 199872901120 (186.15 GB)
    22. DFS Used%: 0.00%
    23. DFS Remaining%: 97.25%
    24. Configured Cache Capacity: 0 (0 B)
    25. Cache Used: 0 (0 B)
    26. Cache Remaining: 0 (0 B)
    27. Cache Used%: 100.00%
    28. Cache Remaining%: 0.00%
    29. Xceivers: 1
    30. Last contact: Thu Mar 14 15:16:33 CST 2024
    31.  
    32.  
    33. Name: 192.168.204.53:50010 (node03)
    34. Hostname: node03
    35. Decommission Status : Normal
    36. Configured Capacity: 205531639808 (191.42 GB)
    37. DFS Used: 266240 (260 KB)
    38. Non DFS Used: 5620936704 (5.23 GB)
    39. DFS Remaining: 199910436864 (186.18 GB)
    40. DFS Used%: 0.00%
    41. DFS Remaining%: 97.27%
    42. Configured Cache Capacity: 0 (0 B)
    43. Cache Used: 0 (0 B)
    44. Cache Remaining: 0 (0 B)
    45. Cache Used%: 100.00%
    46. Cache Remaining%: 0.00%
    47. Xceivers: 1
    48. Last contact: Thu Mar 14 15:16:33 CST 2024
    49.  
    50.  
    51. Name: 192.168.204.51:50010 (node01)
    52. Hostname: node01
    53. Decommission Status : Normal
    54. Configured Capacity: 205531639808 (191.42 GB)
    55. DFS Used: 180224 (176 KB)
    56. Non DFS Used: 6029176832 (5.62 GB)
    57. DFS Remaining: 199502282752 (185.80 GB)
    58. DFS Used%: 0.00%
    59. DFS Remaining%: 97.07%
    60. Configured Cache Capacity: 0 (0 B)
    61. Cache Used: 0 (0 B)
    62. Cache Remaining: 0 (0 B)
    63. Cache Used%: 100.00%
    64. Cache Remaining%: 0.00%
    65. Xceivers: 1
    66. Last contact: Thu Mar 14 15:16:34 CST 2024
    67.  
    68.  
    69. Name: 192.168.204.52:50010 (node02)
    70. Hostname: node02
    71. Decommission Status : Normal
    72. Configured Capacity: 205531639808 (191.42 GB)
    73. DFS Used: 286720 (280 KB)
    74. Non DFS Used: 6029291520 (5.62 GB)
    75. DFS Remaining: 199502061568 (185.80 GB)
    76. DFS Used%: 0.00%
    77. DFS Remaining%: 97.07%
    78. Configured Cache Capacity: 0 (0 B)
    79. Cache Used: 0 (0 B)
    80. Cache Remaining: 0 (0 B)
    81. Cache Used%: 100.00%
    82. Cache Remaining%: 0.00%
    83. Xceivers: 1
    84. Last contact: Thu Mar 14 15:16:34 CST 2024

    二、问题

    1.rsync 同步报错

    （1）报错

    （2）原因分析

    同步主机名称错误。

    （3）解决方法

    修改同步主机名称。

    [root@hadoop ~]# rsync -av /etc/hosts node01:/etc/

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  • 原文地址：https://blog.csdn.net/cronaldo91/article/details/136709547