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hadoop3.1 ha高可用部署

本文转载自  查看原文  2018-12-14 16:47  1314 

1.资源角色规划 

 
 

2.配置

2.1对现有的全分布式集群hadoop配置做一个备份

cd /opt/hadoop-3.1.1/etc/
cp -r  hadoop hadoop-full
 

2.2.配置hadoop-env.sh

注释掉之前的secondarynamenode配置并添加zkfc 和jnn的配置 
vi + hadoop-env.sh  #末尾添加如下配置
export JAVA_HOME=/usr/java/jdk1.8.0_191-amd64
export HDFS_NAMENODE_USER=root
export HDFS_DATANODE_USER=root
#export HDFS_SECONDARYNAMENODE_USER=root
export HDFS_ZKFC_USER=root
export HDFS_JOURNALNODE_USER=root
 

2.4修改配置core-site.xml

<configuration>
    <property>
        <name>fs.defaultFS</name>
        <value>hdfs://node01:9000</value>
    </property>
    <property>
        <name>hadoop.tmp.dir</name>
        <value>/var/hadoop/ha</value>
    </property>
    <property>
        <name>hadoop.http.staticuser.user</name>
        <value>root</value>
    </property>
     #配置zookeeper
     <property>
        <name>ha.zookeeper.quorum</name>
        <value>node02:2181,node03:2181,node04:2181</value>
     </property>
</configuration>
 

2.4修改hdfs-site.xml 

<configuration>
    <property>
        <name>dfs.replication</name> #代表副本
        <value>2</value>
    </property>
    <property>
        <name>dfs.nameservices</name>
        <value>mycluster</value>  #名称自定义
    </property>
    <property>
      <name>dfs.ha.namenodes.mycluster</name>
        <value>nn1,nn2</value>   #这里高可用只配置两个namenode官方推荐3个不超过5个
    </property>
    #配置对应的rpc
    <property>
        <name>dfs.namenode.rpc-address.mycluster.nn1</name>
        <value>node01:8020</value>
    </property>
    <property>
        <name>dfs.namenode.rpc-address.mycluster.nn2</name>
        <value>node02:8020</value>
    </property>
    #http的地址
    <property>
         <name>dfs.namenode.http-address.mycluster.nn1</name>
      <value>node01:9870</value>
    </property>
    <property>
     <name>dfs.namenode.http-address.mycluster.nn2</name>
     <value>node02:9870</value>
    </property>
    #journalnonde配置
    <property>
    <name>dfs.namenode.shared.edits.dir</name>
    <value>qjournal://node01:8485;node02:8485;node03:8485、mycluster</value>
    </property>
    #配置故障转移的代理类直接拷贝官网配置
    <property>
    <name>dfs.client.failover.proxy.provider.mycluster</name>
    <value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
    </property>
    #配置隔离所需的私钥
    <property>
      <name>dfs.ha.fencing.methods</name>
      <value>shell(/bin/true)</value>
    </property>
 
    <property>
      <name>dfs.ha.fencing.ssh.private-key-files</name>
      <value>/root/.ssh/id_rsa</value>
    </property>
    #配置 jnn的edit日志存放位置
    <property>
    <name>dfs.journalnode.edits.dir</name>
    <value>/var/hadoop/ha/journalmode</value>
    </property>
    # 配置自动故障转移
    <property>
     <name>dfs.ha.automatic-failover.enabled</name>
     <value>true</value>
    </property>
</configuration>
 

2.5配置分发

for i in {node01,node02,node03};do scp core-site.xml hdfs-site.xml hadoop-env.sh $i:`pwd`;done

 

3.搭建zookeeper集群

3.1.安装

按照规划需要在node2 node3 node4  分别安装
在node02操作 
tar xf zookeeper-3.4.10.tar.gz -C /opt

3.2.配置zk的环境变量

vi + /etc/profile
export ZOOKEEPER_HOME=/opt/zookeeper-3.4.10
PATH=$PATH:$JAVA_HOME/bin:$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$ZOOKEEPER_HOME/bin
每个节点source一下
 

3.3在conf目录下配置zk

cp zoo_sample.cfg zoo.cfg
更改配置文件zoo.cfg 
dataDir=/var/zk   #修改上图的默认的目录
server.1=node02:2888:3888
server.2=node03:2888:3888
server.3=node04:2888:3888

3.4分发安装包

cd /opt
for i in {node03,node04};do scp -r zookeeper-3.4.10 $i:`pwd`;done
在node02 node03 node04分别创建数据目录

3.5生成id文件

mkdir -p /var/zk  #02 03 04 节点分别创建
[root@node02 opt]# echo 1 > /var/zk/myid
[root@node03 opt]# echo 2 > /var/zk/myid
[root@node04 opt]# echo 3 > /var/zk/myid

3.6.每个节点运行zk

zkServer.sh start

3.7查看各个节点角色分配

[root@node02 conf]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.10/bin/../conf/zoo.cfg
Mode: follower
[root@node03 hadoop]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.10/bin/../conf/zoo.cfg
Mode: follower
[root@node04 ~]# zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.10/bin/../conf/zoo.cfg
Mode: leader
集群中过半的主机存活集群才可用
 
启动客户端
zkCli.sh

4.启动高可用集群

4.1.启动node01 02 03 的journalnode 

hdfs --daemon start journalnode

journalnode启动成功后会产生 ha目录

 

4.2.在node01 或者node02上启动集群 这里选在node01上

[root@node01 ~]# hdfs namenode -format
2018-12-14 20:14:46,691 INFO namenode.FSImage: Allocated new BlockPoolId: BP-1378401332-10.10.0.11-1544789686691
2018-12-14 20:14:46,712 INFO common.Storage: Storage directory /var/hadoop/ha/dfs/name has been successfully formatted.
2018-12-14 20:14:46,880 INFO namenode.FSImageFormatProtobuf: Saving image file /var/hadoop/ha/dfs/name/current/fsimage.ckpt_0000000000000000000 using no compression
2018-12-14 20:14:46,991 INFO namenode.FSImageFormatProtobuf: Image file /var/hadoop/ha/dfs/name/current/fsimage.ckpt_0000000000000000000 of size 389 bytes saved in 0 seconds .
2018-12-14 20:14:47,003 INFO namenode.NNStorageRetentionManager: Going to retain 1 images with txid >= 0

4.3在启动当前的namenode

[root@node01 ha]# hadoop-daemon.sh start namenode
WARNING: Use of this script to start HDFS daemons is deprecated.
WARNING: Attempting to execute replacement "hdfs --daemon start" instead.
[root@node01 ha]# jps
1168 JournalNode
1907 Jps
1813 NameNode
 

4.4.node2同步node1

[root@node02 hadoop]# hdfs namenode -bootstrapStandby
2018-12-14 20:28:58,949 INFO common.Storage: Storage directory /var/hadoop/ha/dfs/name has been successfully formatted.
2018-12-14 20:28:59,027 INFO namenode.FSEditLog: Edit logging is async:true
2018-12-14 20:28:59,211 INFO namenode.TransferFsImage: Opening connection to http://node01:9870/imagetransfer?getimage=1&txid=0&storageInfo=-64:1201005544:1544789686691:CID-19ab0096-4ecd-4232-a0d2-18591ba70e24&bootstrapstandby=true
2018-12-14 20:28:59,393 INFO common.Util: Combined time for file download and fsync to all disks took 0.00s. The file download took 0.00s at 0.00 KB/s. Synchronous (fsync) write to disk of /var/hadoop/ha/dfs/name/current/fsimage.ckpt_0000000000000000000 took 0.00s.
2018-12-14 20:28:59,393 INFO namenode.TransferFsImage: Downloaded file fsimage.ckpt_0000000000000000000 size 389 bytes.
2018-12-14 20:28:59,450 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at node02/10.10.0.12
************************************************************/

 

4.5.验证同步

[root@node01 hadoop]#  cat /var/hadoop/ha/dfs/name/current/VERSION
#Fri Dec 14 20:14:46 CST 2018
namespaceID=1201005544
clusterID=CID-19ab0096-4ecd-4232-a0d2-18591ba70e24
cTime=1544789686691
storageType=NAME_NODE
blockpoolID=BP-1378401332-10.10.0.11-1544789686691
layoutVersion=-64
[root@node02 hadoop]# cat /var/hadoop/ha/dfs/name/current/VERSION
#Fri Dec 14 20:28:58 CST 2018
namespaceID=1201005544
clusterID=CID-19ab0096-4ecd-4232-a0d2-18591ba70e24
cTime=1544789686691
storageType=NAME_NODE
blockpoolID=BP-1378401332-10.10.0.11-1544789686691
layoutVersion=-64
 

4.6.zk 格式化

[root@node01 hadoop]# hdfs zkfc -formatZK
在zk的客户端查看根目录多了一个hadoop-ha节点
node01 和node02 注册到 zk的mycluster 节点下，谁先注册上谁就是主节点
 

4.7启动hadoop集群

[root@node01 hadoop]# start-dfs.sh
Starting namenodes on [node01 node02]
Last login: Fri Dec 14 20:12:54 CST 2018 from 10.10.0.1 on pts/0
node01: namenode is running as process 1813.  Stop it first.
Starting datanodes
 

4.8验证各节点角色分配情况

 
 
此时查看zk的mycluster目录下的节点 多了两个子节点
 
 

5.验证

5.1 获取节点状态

[root@node01 ~]# hdfs haadmin -getServiceState nn1
active
[root@node01 ~]# hdfs haadmin -getServiceState nn2
standby

 

 5.2通过网页验证

5.3模拟主节点 node01的namenode 不可用

[root@node01 hadoop]# hdfs --daemon stop namenode
[root@node01 hadoop]# jps
1168 JournalNode
4488 Jps
3711 DFSZKFailoverController
[root@node01 hadoop]# hdfs haadmin -getServiceState nn2   #此时节点2变为active
active
 

5.4zk客户端查看 

 
 

5.5再次查看网页node01 已经不可用，node02变为active

 
 
 

5.6验证非抢占

如果将node01的namenode继续开启，它不会抢占当前的active节点，除非当前node02的namenode挂了，它会由standby变为active 
[root@node01 hadoop]# hdfs --daemon start namenode
[root@node01 hadoop]# hdfs haadmin -getServiceState nn1
standby
[root@node01 hadoop]# hdfs haadmin -getServiceState nn2
active
让node02的namenode挂掉
[root@node02 logs]# hdfs --daemon stop namenode
[root@node02 logs]# hdfs haadmin -getServiceState nn1
active
 
 

6踩坑记

6.1standby状态的namenode的状态不能切换为active

是一个配置项搞错了，zkfc日志显示 是ssh的时候出现错误
参考文章  https://blog.csdn.net/u014034934/article/details/76558833  解决
 
 

6.2集群的datanode起不来

查看datanode日志发现各种 
Response message:
This node has namespaceId '2127146492 and clusterId 'CID-7434d466-7cff-488c-b4fc-82ec6245cb34' but the requesting node expected '1201005544' and 'CID-19ab0096-4ecd-4232-a0d2-18591ba70e24'
    at org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream$URLLog$1.run(EditLogFileInputStream.java:435)
    at org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream$URLLog$1.run(EditLogFileInputStream.java:420)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1729)
    at org.apache.hadoop.security.SecurityUtil.doAsUser(SecurityUtil.java:515)
    at org.apache.hadoop.security.SecurityUtil.doAsCurrentUser(SecurityUtil.java:509)
    at org.apache.hadoop.hdfs.server.namenode.EditLogFileInputStream$URLLog.getInputStream(EditLogFileInputStream.

 

 
 
 
 


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