一、概述

客户集群机房迁移，我们部署的集群也要完成跨集群迁移hbase 表，这里选择迁移Hadoop底层数据来实现hbase的表迁移。

迁移Hadoop底层文件的方式有两种：

distcp
从旧集群get 获取文件到本地在 put到新集群上。

因为，我们这个A集群是kerberos 环境，B集群是不带kerberos环境，这里使用Distcp的方式。这里仅是为了迁移底层数据，所以选择那种方式都可以。

二、环境信息

HBase2.0.2

三、HBCK2下载和编译

GitHub 上下载

GitHub - apache/hbase-operator-tools: Apache HBase Operator Tools

编译

mvn clean install -DskipTests

如下图我编译成功的 hbck2 jar包

命令行执行可以看具体参数的用法

sudo -u hbase  hbase   --config /etc/hbase/  hbck  -j /home/jz/hbase-hbck2-1.3.0-SNAPSHOT.jar
usage: HBCK2 [OPTIONS] COMMAND <ARGS>
Options:
 -d,--debug                                       run with debug output
 -h,--help                                        output this help message
 -p,--hbase.zookeeper.property.clientPort <arg>   port of hbase ensemble
 -q,--hbase.zookeeper.quorum <arg>                hbase ensemble
 -s,--skip                                        skip hbase version check
                                                  (PleaseHoldException)
 -v,--version                                     this hbck2 version
 -z,--zookeeper.znode.parent <arg>                parent znode of hbase
                                                  ensemble
Command:
 addFsRegionsMissingInMeta [<NAMESPACE|NAMESPACE:TABLENAME>...|-i
<INPUTFILES>...]
   Options:
    -i,--inputFiles  take one or more files of namespace or table names
   To be used when regions missing from hbase:meta but directories
   are present still in HDFS. Can happen if user has run _hbck1_

四、具体操作步骤

两个步骤：
（1）拷贝底层表hdfs数据
（2）使用hbck工具恢复表数据

4.1 数据同步

hadoop distcp -Dipc.client.fallback-to-simple-auth-allowed=true -Dmapreduce.map.memory.mb=1024  -D mapred.map.max.attempts=3 -m 3 -numListstatusThreads 3 \
hdfs://10.82.28.171:8020/apps/hbase/data/data/default/trafficLhbDevInOutData_2020 \
hdfs://10.82.50.191:8020/apps/hbase/data/data/default

修改数据表目录权限

sudo -u hdfs hdfs dfs -chown -R hbase:hdfs   /apps/hbase/data/data/default/trafficLhbDevInOutData_2020

4.2 添加元数据

hbase  --config /usr/hdp/3.1.4.0-315/hbase/   hbck -j /home/jz/hbase-hbck2-1.3.0-SNAPSHOT.jar -z  /hbase-unsecure  addFsRegionsMissingInMeta   default:trafficLhbDevInOutData_2020

## 执行
[xxxprd@qcs-client ~]$ hbase  --config /usr/hdp/3.1.4.0-315/hbase/conf/   hbck -j /home/jz/hbase-hbck2-1.3.0-SNAPSHOT.jar -z  /hbase-unsecure  addFsRegionsMissingInMeta   default:trafficLhbDevInOutData_2020
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/home/jzhprd/hbase-hbck2-1.3.0-SNAPSHOT.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/usr/hdp/3.1.4.0-315/phoenix/phoenix-5.0.0.3.1.4.0-315-server.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/usr/hdp/3.1.4.0-315/hadoop/lib/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
18:16:30.311 [main] INFO  org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient - Connect 0x74f7d1d2 to qcs-namenode:2181,qcs-client:2181,qcs-snamenode:2181 with session timeout=90000ms, retries 6, retry interval 1000ms, keepAlive=60000ms
18:16:31.284 [main] INFO  org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient - Close zookeeper connection 0x74f7d1d2 to qcs-namenode:2181,qcs-client:2181,qcs-snamenode:2181
Regions re-added into Meta: 6
WARNING:
        6 regions were added to META, but these are not yet on Masters cache.
You need to restart Masters, then run hbck2 'assigns' command below:
                assigns 034307e7c4ca3f0f65c806077d4bb123 3302faa35da3877220c1b49589208b89 3fcd8d4755d9ddd2d1a7af7e309dd049 4c306f12b329a78928e1439b48e257f7 56213be6765d63585ed4f3c1c9d48f9f 887bbf63e7f905bc84ba1bcd4fd8681c
[xxxprd@qcs-client ~]$

You need to restart Masters, then run hbck2 'assigns' command below（重启Master）

从HMaster -web 可以看到表的 2 个Region 的状态为 Other Regions

4.3 重新分配region

hbase  --config /usr/hdp/3.1.4.0-315/hbase/   hbck -j /home/jz/hbase-hbck2-1.3.0-SNAPSHOT.jar -z  /hbase-unsecure  assigns  063844973716717e1ddf6a705dd02907 afad0ca9c4587a3a26a778f2b79929d4

执行返回ID，如果返回 -1 则表示分配不成功

[jz@qcs-client ~]$ hbase  --config /usr/hdp/3.1.4.0-315/hbase/   hbck -j /home/jz/hbase-hbck2-1.3.0-SNAPSHOT.jar -z  /hbase-unsecure  assigns  063844973716717e1ddf6a705dd02907 afad0ca9c4587a3a26a778f2b79929d4
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/home/jzhprd/hbase-hbck2-1.3.0-SNAPSHOT.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/usr/hdp/3.1.4.0-315/phoenix/phoenix-5.0.0.3.1.4.0-315-server.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/usr/hdp/3.1.4.0-315/hadoop/lib/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
17:58:15.614 [main] INFO  org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient - Connect 0x3fc79729 to localhost:2181 with session timeout=90000ms, retries 30, retry interval 1000ms, keepAlive=60000ms
[114, 115]
17:58:16.450 [main] INFO  org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient - Close zookeeper connection 0x3fc79729 to localhost:2181
[jz@qcs-client ~]$

执行完上面的命令后可以看到 2 个Region 的状态由 Other Regions 变为 Online Regions