Search the VMware Knowledge Base (KB)
View by Article ID

Mapping VMware High Availability Heartbeats and Communication Paths (1010991)

  • 1 Ratings

Symptoms

You may experience these symptoms: 
  • VMware High Availability (HA) shows false alerts
  • Cannot determine where a HA issue is generating

Resolution

When dealing with a HA problem in a cluster, it is very difficult to tell where the problem is originating.
 
If several hosts are showing issues, it may be any of the primary hosts (not just the master) which is having a problem, since client (non-primary) hosts do not talk directly to the current master primary. Therefore, the primaries share state communications with the community hosts. This is described as one of the scalability features of HA.
 
To identify the real primary host, view the following file:
/etc/opt/vmware/aam/vmware-sites

This file maps hostname-to-ID# for the environment

Logging details often show just the ID, not the hostname

Note: The ID is what is noted the /var/log/vmware/aam/procMon/{hostname}_fatal.out* file(s) as the host actually being used for the connections in the LAG and various EVENT statements. Host IDs are evidently the first digit before the / in the parentheses.

The vpxa logs only show the master primary as the connection, but this may not actually be the host which a secondary's communication actually goes to. The idea being to allow HA to distribute the heartbeat load among primaries.
Run the following commands on live systems to view the mapping of the cluster's hosts:
export FT_DIR=/opt/vmware/aam/bin
export FT_DOMAIN=vmware
$FT_DIR/ftcli
fcli> la -l
  (S
hows mapping of the cluster hosts)

Request a Product Feature

To request a new product feature or to provide feedback on a VMware product, please visit the Request a Product Feature page.

Feedback

  • 1 Ratings

Did this article help you?
This article resolved my issue.
This article did not resolve my issue.
This article helped but additional information was required to resolve my issue.

What can we do to improve this information? (4000 or fewer characters)




Please enter the Captcha code before clicking Submit.
  • 1 Ratings
Actions
KB: