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How to Update /etc/cloudera-scm-agent/config.ini On Cloudera Manager Managed Edge Nodes During Node 3 Migration (Doc ID 2526029.1)

Last updated on NOVEMBER 08, 2019

Applies to:

Big Data Appliance Integrated Software - Version 4.11.0 and later
Linux x86-64

Goal

By default the Cloudera Manager(CM) server runs on Node 3.

Therefore during a Node 3 migration references to the CM server on Node 3 in the Cloudera Manager agent configuration file, /etc/cloudera-scm-agent/config.ini, need to be updated to reflect the new host. The file, /etc/cloudera-scm-agent/config.ini, contains a "server_host" parameter to hold the CM server value. By default it looks like:

# Hostname of Cloudera SCM Server
server_host=<HOSTNAME3>.<DOMAIN>

During a Mammoth Node 3 migration, the "server_host" parameter in the CM agent configuration file are updated for all BDA hosts in the cluster.

However, Mammoth migration does not update non-BDA cluster nodes. Therefore if the cluster contains Cloudera Manager managed edge nodes Mammoth will not update them.  The result is that the config.ini file on those nodes will not have the "server_host" parameter updated to reflect the correct CM server host.

If the "server_host" parameter on CM managed edge nodes is not updated during Node 3 migration, edge nodes can not heartbeat into the cluster and the cluster will not be fully healthy.

To avoid this problem, between the Node 3 migration  Step 4, InstallHadoop, and Step 5, StartHadoopServices, the /etc/cloudera-scm-agent/config.ini file on each CM managed edge nodes needs to be updated so the "server_host" parameter contains the correct CM server host.


 

Solution

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