1. 目前可用的YARN resourceManager状态存储实现类有如下三个：
org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore # a ZooKeeper based state-store implementation . org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore # a Hadoop FileSystem based state-store implementation like HDFS and local FS , default . org.apache.hadoop.yarn.server.resourcemanager.recovery.LeveldbRMStateStore # a LevelDB based state-store implementation
2. 相关配置(最小配置，相关官网说明地址：https://hadoop.apache.org/docs/stable/hadoop-yarn/hadoop-yarn-site/ResourceManagerHA.html)
<property> <name>yarn.resourcemanager.ha.enabled</name> <value>true</value> </property> <property> <name>yarn.resourcemanager.cluster-id</name> <value>cluster1</value> </property> <property> <name>yarn.resourcemanager.ha.rm-ids</name> <value>rm1,rm2</value> </property> <property> <name>yarn.resourcemanager.hostname.rm1</name> <value>master1</value> </property> <property> <name>yarn.resourcemanager.hostname.rm2</name> <value>master2</value> </property> <property> <name>yarn.resourcemanager.webapp.address.rm1</name> <value>master1:8088</value> </property> <property> <name>yarn.resourcemanager.webapp.address.rm2</name> <value>master2:8088</value> </property> <property> <name>hadoop.zk.address</name> <value>zk1:2181,zk2:2181,zk3:2181</value> </property>
3. 在zk中存储的信息如下：
get /yarn-leader-election/yarn-rm-cluster/ActiveBreadCrumb yarn-rm-clusterrm1 cZxid = 0xca0e11dc4 ctime = Thu Sep 08 20:31:40 CST 2022 mZxid = 0xca0e11dc4 mtime = Thu Sep 08 20:31:40 CST 2022 pZxid = 0xca0e11dc4 cversion = 0 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 22 numChildren = 0
get /yarn-leader-election/yarn-rm-cluster/ActiveStandbyElectorLock yarn-rm-clusterrm1 cZxid = 0xca0e11dc3 ctime = Thu Sep 08 20:31:40 CST 2022 mZxid = 0xca0e11dc3 mtime = Thu Sep 08 20:31:40 CST 2022 pZxid = 0xca0e11dc3 cversion = 0 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x48243f368178603 dataLength = 22 numChildren = 0
主备切换参考：
https://www.cnblogs.com/wttttt/p/7652852.html
标签：resourcemanager,可用,08,ZK,hadoop,yarn,Yarn,CST,rm From： https://www.cnblogs.com/weizaiyan/p/16708928.html