#格式化后会在根据core-site.xml中的hadoop.tmp.dir配置生成个文件，这里我配置的是/app/hadoop/tmp，然后将/app/hadoop/tmp拷贝到mini02的/app/hadoop/下。
# 方法1：
[yun@mini01 hadoop]$ pwd
/app/hadoop
[yun@mini01 hadoop]$ scp -r tmp/ yun@mini02:/app/hadoop
VERSION 100% 202 189.4KB/s 00:00
seen_txid 100% 2 1.0KB/s 00:00
fsimage_0000000000000000000.md5 100% 62 39.7KB/s 00:00
fsimage_0000000000000000000 100% 320 156.1KB/s 00:00
##########################3
# 方法2：##也可以这样，建议hdfs namenode -bootstrapStandby # 不过需要mini02的Hadoop起来才行
8.4. 格式化ZKFC
#在mini01上执行一次即可
[yun@mini01 ~]$ hdfs zkfc -formatZK
18/06/30 18:54:30 INFO tools.DFSZKFailoverController: Failover controller configured for NameNode NameNode at mini01/10.0.0.111:9000
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:zookeeper.version=3.4.6-1569965, built on 02/20/2014 09:09 GMT
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:host.name=mini01
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:java.version=1.8.0_112
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:java.vendor=Oracle Corporation
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:java.home=/app/jdk1.8.0_112/jre
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:java.class.path=……………………
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:java.library.path=/app/hadoop-2.7.6/lib/native
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:java.io.tmpdir=/tmp
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:java.compiler=<NA>
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:os.name=Linux
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:os.arch=amd64
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:os.version=3.10.0-693.el7.x86_64
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:user.name=yun
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:user.home=/app
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Client environment:user.dir=/app/hadoop-2.7.6
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=mini03:2181,mini04:2181,mini05:2181,mini06:2181,mini07:2181 sessionTimeout=5000 watcher=org.apache.hadoop.ha.ActiveStandbyElector$WatcherWithClientRef@7f3b84b8
18/06/30 18:54:30 INFO zookeeper.ClientCnxn: Opening socket connection to server mini04/10.0.0.114:2181. Will not attempt to authenticate using SASL (unknown error)
18/06/30 18:54:30 INFO zookeeper.ClientCnxn: Socket connection established to mini04/10.0.0.114:2181, initiating session
18/06/30 18:54:30 INFO zookeeper.ClientCnxn: Session establishment complete on server mini04/10.0.0.114:2181, sessionid = 0x4644fff9cb80000, negotiated timeout = 5000
18/06/30 18:54:30 INFO ha.ActiveStandbyElector: Session connected.
18/06/30 18:54:30 INFO ha.ActiveStandbyElector: Successfully created /hadoop-ha/bi in ZK.
18/06/30 18:54:30 INFO zookeeper.ZooKeeper: Session: 0x4644fff9cb80000 closed
18/06/30 18:54:30 INFO zookeeper.ClientCnxn: EventThread shut down
8.5. 启动HDFS