參考1：https://blog.csdn.net/ccren/article/details/93485200
參考2：https://blog.csdn.net/qq_40235064/article/details/89074917
參考3：https://blog.csdn.net/qq_19524879/article/details/83659747
四個節點
docker run -itd --name hadoop1 --add-host hadoop1:172.17.0.2 --add-host hadoop2:172.17.0.3 --add-host hadoop3:172.17.0.4 --add-host hadoop4:172.17.0.5 -p 5002:22 -p 9870:9870 -p 8088:8088 -p 19888:19888 hadoop-ha-yarn /usr/sbin/sshd -D
docker run -itd --name hadoop2 --add-host hadoop1:172.17.0.2 --add-host hadoop2:172.17.0.3 --add-host hadoop3:172.17.0.4 --add-host hadoop4:172.17.0.5 -p 5003:22 -p 9871:9870 hadoop-ha-yarn /usr/sbin/sshd -D
docker run -itd --name hadoop3 --add-host hadoop1:172.17.0.2 --add-host hadoop2:172.17.0.3 --add-host hadoop3:172.17.0.4 --add-host hadoop4:172.17.0.5 -p 5004:22 -p 8087:8088 hadoop-ha-yarn /usr/sbin/sshd -D
docker run -itd --name hadoop4 --add-host hadoop1:172.17.0.2 --add-host hadoop2:172.17.0.3 --add-host hadoop3:172.17.0.4 --add-host hadoop4:172.17.0.5 -p 5005:22 -p 8086:8088 hadoop-ha-yarn /usr/sbin/sshd -D
集羣規劃
| hostname | namenode | datanode | zookeeper | zkfc | journalnode | resourcemanager | nodemanager |
| hadoop1 | 1 | 1 | 1 | 1 | 1 | ||
| hadoop2 | 1 | 1 | 1 | 1 | 1 | 1 | |
| hadoop3 | 1 | 1 | 1 | 1 | 1 | ||
| hadoop4 | 1 | 1 | 1 |
鏡像製作好後啓動容器：
docker run -itd --name hadoop1 --add-host hadoop1:172.17.0.2 --add-host hadoop2:172.17.0.3 --add-host hadoop3:172.17.0.4 --add-host hadoop4:172.17.0.5 -p 5002:22 -p 9870:9870 -p 8088:8088 -p 19888:19888 hadoop-ha-yarn /usr/sbin/sshd -D
docker run -itd --name hadoop2 --add-host hadoop1:172.17.0.2 --add-host hadoop2:172.17.0.3 --add-host hadoop3:172.17.0.4 --add-host hadoop4:172.17.0.5 -p 5003:22 -p 9871:9870 hadoop-ha-yarn /usr/sbin/sshd -D
docker run -itd --name hadoop3 --add-host hadoop1:172.17.0.2 --add-host hadoop2:172.17.0.3 --add-host hadoop3:172.17.0.4 --add-host hadoop4:172.17.0.5 -p 5004:22 -p 8087:8088 hadoop-ha-yarn /usr/sbin/sshd -D
docker run -itd --name hadoop4 --add-host hadoop1:172.17.0.2 --add-host hadoop2:172.17.0.3 --add-host hadoop3:172.17.0.4 --add-host hadoop4:172.17.0.5 -p 5005:22 -p 8086:8088 hadoop-ha-yarn /usr/sbin/sshd -D
使用CRT之類的客戶端ssh登上去操作
1.啓動zookeeper 4臺(出現一個leader，三個follower，啓動成功)
# bin/zkServer.sh start # bin/zkServer.sh status
2.啓動journalnode（分別在hadoop1、hadoop2、hadoop3上執行）
# cd /opt/modules/ha-hadoop/hadoop-3.1.2/
# bin/hdfs --daemon start journalnode
或者以下命令也是開啓 journalnode
# sbin/hadoop-deamon.sh start journalnode
# jps
1553 Jps
993 QuorumPeerMain
1514 JournalNode
# jps
993 QuorumPeerMain
1514 JournalNode
1563 Jps
出現JournalNode則表示journalnode啓動成功。
3.格式化namenode（只要格式化一臺，另一臺同步，兩臺都格式化，你就做錯了！！如：在hadoop2節點上）
# bin/hdfs namenode -format
如果在倒數8行左右的地方，出現這一句就表示成功
INFO common.Storage: Storage directory /home/hadoop/tmp/dfs/name has been successfully formatted.
啓動namenode
# bin/hdfs --daemon start namenode
# jps
993 QuorumPeerMain
1681 NameNode
1747 Jps
1514 JournalNode
#cat /home/hadoop/tmp/dfs/name/current/VERSION
#Tue Jun 25 14:59:40 UTC 2019
namespaceID=1463663733
clusterID=CID-32938cd0-ed33-40f6-90c5-2326198e31bd
cTime=1561474780005
storageType=NAME_NODE
blockpoolID=BP-789586919-172.17.0.2-1561474780005
layoutVersion=-65
4.同步hadoop1元數據到hadoop2中（必須先啓動hadoop1節點上的namenode）
在hadoop2主機上執行：
# bin/hdfs namenode -bootstrapStandby
如果出現：INFO common.Storage: Storage directory /home/hadoop/tmp/dfs/name has been successfully formatted.
說明同步成功
# cat /home/hadoop/tmp/dfs/name/current/VERSION
#Tue Jun 25 15:07:27 UTC 2019
namespaceID=1463663733
clusterID=CID-32938cd0-ed33-40f6-90c5-2326198e31bd
cTime=1561474780005
storageType=NAME_NODE
blockpoolID=BP-789586919-172.17.0.2-1561474780005
layoutVersion=-65
hadoop1和hadoop2顯示的信息一致，則namenode數據同步成功
5.格式化ZKFC(在hadoop1上執行一次即可)
# bin/hdfs zkfc -formatZK
若在倒數第4行顯示：INFO ha.ActiveStandbyElector: Successfully created /hadoop-ha/mycluster in ZK.
則表示ZKFC格式化成功
6.啓動HDFS、yarn(在hadoop1上執行)
# sbin/start-dfs.sh
# sbin/start-yarn.sh
7.訪問http://192.168.99.100:9870,http://192.168.99.100:8086