Robert Nettleton created AMBARI-10411:
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Summary: Yarn ResourceManager HA config properties not processed
properly by Blueprints
Key: AMBARI-10411
URL: https://issues.apache.org/jira/browse/AMBARI-10411
Project: Ambari
Issue Type: Bug
Components: ambari-server
Affects Versions: 2.0.0
Reporter: Robert Nettleton
Assignee: Robert Nettleton
Priority: Critical
Fix For: 2.1.0
In order to reproduce this problem:
1. Use the Ambari UI to deploy a multi-node Yarn cluster
2. Use the Ambari UI wizard to enable Yarn ResourceManager High-Availability
3. Use the Ambari REST API to request an exported Blueprint based on the
running cluster.
When exporting a Blueprint from a running cluster that utilizes Yarn
ResourceManager High-Availability (HA), the following Yarn configuration
properties (HA-related) are not properly exported, and hostname information is
included in the exported Blueprint.
The following properties are not exported properly:
yarn.resourcemanager.hostname.$NAME_OF_RM
Note: $NAME_OF_RM indicates the name of a running resource manager in Yarn. In
an HA deployment scenario, this property name will include the name of a
resource manager, and will point towards the host that this resource manager is
deployed on. There will be one instance of this property per resource manager.
For most scenarios, this means there will be at most 2 of these properties to
consider.
yarn.resourcemanager.zk-address
Note: This property should refer to a comma-separate list of Zookeeper servers.
In each of these cases, the Blueprint configuration processor should strip out
the hostname information, and substitute the name of the host group that
includes this host service.
These changes should be implemented in the BlueprintConfigurationProcessor
class.
This bug will not keep a Yarn HA Blueprint from deploying, but will affect the
round-tripping process of deploying a new cluster based on a Blueprint, since
the hostname information would need to be manually updated if the host names
have changed for the cluster deployment.
This bug will also affect the usage of %HOSTGROUP% syntax in Yarn HA
properties, since the config processor is not properly handling the export of
these properties from a running cluster, nor is is properly handling
subsitution at cluster deployment time for Yarn HA properties.
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