Jonathan Hurley created AMBARI-23852: ----------------------------------------
Summary: Provide a Framework For Adding A Component During Upgrade Key: AMBARI-23852 URL: https://issues.apache.org/jira/browse/AMBARI-23852 Project: Ambari Issue Type: Task Components: ambari-server Affects Versions: 2.7.0 Reporter: Jonathan Hurley Assignee: Jonathan Hurley Fix For: 2.7.0 During an upgrade it might be necessary to add a component automatically. For example, if a component is being replaced between stacks, then Ambari needs to remove the original component and add the new one. This is a new situation which we've never had before. AMBARI-23553 was created to automatically remove services/components during an upgrade which didn't appear in the new stack. However, to replace a service component is something that involves more thought. Perhaps we need an action that's similar to this: {code} <group xsi:type="cluster" name="ADD_YARN_TIMELINE_READER" title="Replace ATS with Timeline Reader"> <execute-stage title="Replace ATS with Timeline Reader"> <task xsi:type="server_action" class="org.apache.ambari.server.serveraction.upgrades.AddNewComponentForExistingService"> <summary>Add Timeline Reader to the cluster</summary> <parameter name="service">YARN</parameter> <parameter name="component">TIMELINE_READER</parameter> <parameter name="host-service">YARN</parameter> <parameter name="host-component"> APP_TIMELINE_SERVER </parameter> </task> </execute-stage> </group> {code} I suppose we could also have a new type of task that does this as well: {code} <group xsi:type="cluster" name="ADD_YARN_TIMELINE_READER" title="Replace ATS with Timeline Reader"> <execute-stage title="Replace ATS with Timeline Reader"> <task xsi:type="add_component" service="YARN" component="TIMELINE_READER" host-service="YARN" host-component="APP_TIMELINE_SERVER"> <summary>Add Timeline Reader to the cluster</summary> </task> </execute-stage> </group> {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)