Hadoop 启动/停止集群和节点的命令

集群

启动/停止Hadoop集群:start-all.sh    stop-all.sh

1) 启动NameNode, DataNode

2) 启动JournalNode, JournalNode在hdfs-site.xml中指定edits log存储的位置,主备NameNode共享数据,方便同步

3) 启动DFSZKFailoverController, HA会启用ZooKeeper Failover Controller

4) 启动YARN守护进程ResourceManager, NodeManager

启动/停止HDFS集群:start-dfs.sh    stop-dfs.sh

1) 启动NameNode, DataNode

2) 启动JournalNode, JournalNode在hdfs-site.xml中指定edits log存储的位置,主备NameNode共享数据,方便同步

3) 启动DFSZKFailoverController, HA会启用ZooKeeper Failover Controller

启动/停止YARN集群:start-yarn.sh    stop-yarn.sh

据说如果ResourceManager和NameNode不在同一台机器上,那NameNode上无法直接使用start-yarn.sh启动ResourceManager,但NodeManager可以启动,ResourceManager需要在ResourceManager节点上启动,这一点待考证


节点

启动NameNode: hadoop-daemon.sh start namenode

启动DataNode: hadoop-daemon.sh start datanode

启动JournalNode节点: hadoop-daemon.sh start journalnode

启动zkfc节点:hadoop-daemon.sh start zkfc

启动ResourceManager: yarn-daemon.sh start resourcemanager

启动NodeManager: yarn-daemon.sh start nodemanager

启动ZooKeeper节点:zkServer.sh start    启动QuorumPeerMain进程

查看ZooKeeper节点状态:zkServer.sh status    查看leader和follower状态

格式化HDFS: hdfs namenode -format

格式化ZKFC:hdfs zkfc -formatZK

查看NameNode和DataNode信息: hdfs dfsadmin -report

查看高可用NameNode状态: hdfs haadmin -getServiceState nn1 (active/standby)


Web界面端口

NameNode 50070

DataNode 50075

ResourceManager 8088

NodeManager 8042

更多端口参考


安装,查看等常用命令 

查看进程:jps

kill进程:kill -9 pid

内容追加到文件:echo content > file, 如 echo 1 > myid

SSH拷贝:scp,如scp -r /usr/local/hadoop master:/usr/local

关闭防火墙:

查看状态systemctl status firewalld

关闭防火墙systemctl stop firewalld

开机禁用防火墙systemctl disable firewalld

配置免登录:

ssh-keygen -t rsa

ssh-copy-id -i host01


Hadoop Shell命令

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