Ambari 2 Managing and Monitoring a Cluster Date of Publish: 2019-12-17 https://docs.hortonworks.com Ambari | Contents | ii Contents Introducing Ambari operations.............................................................................. 5 Understanding Ambari architecture......................................................................................................................5 Access Ambari......................................................................................................................................................6 Access Ambari Admin page.................................................................................................................................7 Working with the cluster dashboard......................................................................8 Open the cluster dashboard.................................................................................................................................. 9 Scan operating status.......................................................................................................................................... 10 Monitor service metrics......................................................................................................................................12 View cluster health.............................................................................................................................................12 View cluster heatmaps........................................................................................................................................14 Finding current stack and versions information................................................................................................ 15 Viewing service account user names................................................................................................................. 18 Modifying the cluster dashboard.......................................................................... 20 Replace a removed widget................................................................................................................................. 20 Reset the dashboard............................................................................................................................................20 Customize metrics display..................................................................................................................................21 Managing Hosts.......................................................................................................21 View host status..................................................................................................................................................21 Find a host in the cluster................................................................................................................................... 22 Perform host level actions..................................................................................................................................24 Add a host to a cluster.......................................................................................................................................25 Manage components on a host...........................................................................................................................26 Decommission a host..........................................................................................................................................28 Decommission a NodeManager..........................................................................................................................28 Decommission a RegionServer.......................................................................................................................... 29 Decommission a DataNode................................................................................................................................ 30 Delete a component............................................................................................................................................ 31 Delete a host from a cluster...............................................................................................................................32 Bulk add or delete hosts.....................................................................................................................................33 Setting Maintenance Mode.................................................................................................................................34 Set Maintenance Mode for a host......................................................................................................................35 Set Maintenance Mode for a service................................................................................................................. 36 Establishing Rack Awareness................................................................................37 Set the rack id for Ambari................................................................................................................................. 37 Set the rack id on a host.................................................................................................................................... 38 Set the rack id using a custom topology script................................................................................................. 39 Managing Services.................................................................................................. 39 View service summary....................................................................................................................................... 40 Find quick links to service information.............................................................................................................41 Ambari | Contents | iii Link to the native user interface........................................................................................................................ 42 Add or remove a service widget........................................................................................................................43 Create a service widget...................................................................................................................................... 44 Delete a service widget...................................................................................................................................... 45 Export widget graph data................................................................................................................................... 46 Set display timezone...........................................................................................................................................47 Modify the service metrics dashboard............................................................................................................... 47 Performing service actions................................................................................................................................. 48 Start all services..................................................................................................................................................49 Stop all services..................................................................................................................................................50 Add a service...................................................................................................................................................... 51 Restart multiple components.............................................................................................................................. 56 Set rolling restart parameters............................................................................................................................. 57 Monitor background operations..........................................................................................................................58 Abort a rolling restart.........................................................................................................................................60 Enable Service Auto Start from Ambari Web...................................................................................................61 Disable service auto start settings from Ambari Web....................................................................................... 62 Remove a service................................................................................................................................................64 Bulk add or delete service components............................................................................................................. 64 Read audit log files............................................................................................................................................ 65 Enable the Oozie UI...........................................................................................................................................65 Enable the Oozie UI on CentOS RHEL Oracle Linux 7 PPC...............................................................67 Enable the Oozie UI on CentOS RHEL Oracle Linux 7.......................................................................68 Enable the Oozie UI on 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