CLOUD_NETCONFIG_MANAGE in a HA Cluster

This document (7023633) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise High Availability Extension 12

Situation

Check the installed cloud-netconfig-azure package version by running zypper info cloud-netconfig-azure.
If the version is 1.3 or higher, it is no longer necessary to suppress the management of network interfaces by the cloud network plugin. If the version is lower than 1.3, we suggest to update package cloud-netconfig-azure to the latest available version.

-

For cloud-netconfig-azure package version lower than 1.3:

In a HA Cluster in a Cloud Enviroment a configured IP Address sometimes disappears resulting in a restart or sometimes even a resource migration - see Resolution section.

Resolution

In the configuration file of the network interface,  
     /etc/sysconfig/network/ifcfg-eth0
modify  the option

   CLOUD_NETCONFIG_MANAGE="yes"

is set. This has to be set to

   CLOUD_NETCONFIG_MANAGE="no"
 

Cause

The CLOUD_NETCONFIG_MANAGE parameter makes the cloud network plugin check whether all IP's on an interface are configured for that interface and if not remove them. Which is a good and desireable behaviour normally.

In a HA Cluster normally the only way for a client to connect to the Cluster is via an IP from the cluster that is dynamically set by the Cluster and not in the configuration file.

As such the two concepts conflict with each other.

In a HA Cluster Setup it is recommended to set the parameter to

   NO

to ensure that the IP wont be touched.
 

Additional Information

 

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7023633
  • Creation Date: 11-Jan-2019
  • Modified Date:15-Jun-2021
    • SUSE Linux Enterprise High Availability Extension

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