zhangfred_vm
Contributor
Contributor

What the function of the Primary HA agent in HA cluster?

Jump to solution

Hi friends,

Is there primary HA agent in HA cluster?

If it has, what is difference between the primary and common agent?

0 Kudos
1 Solution

Accepted Solutions
esiebert7625
Immortal
Immortal

It's in this doc...

http://www.vmware.com/pdf/vi3_301_201_resource_mgmt.pdf

Primary and Secondary Hosts

When you add a host to an HA cluster, that host has to communicate with a primary host in the same cluster to complete its configuration (unless it’s the first host in the cluster, which makes it the primary host). The first hosts in the cluster become primary hosts, all others are secondary hosts. When a primary host goes down or is removed, HA automatically promotes another host to primary status. Primary hosts help to provide redundancy and are used to initiate failover actions.

If all the hosts in the cluster are not responding, and you add a new host to the cluster, HA configuration fails because the new host cannot communicate with any of the primary hosts. In this situation, you must disconnect all the hosts that are not responding before you can add the new host. The new host becomes the first primary host. When the other hosts become available again, their HA service is reconfigured.

Fyi…if you find this post helpful, please award points using the Helpful/Correct buttons.

-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-

Thanks, Eric

Visit my website: http://vmware-land.com

-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-

View solution in original post

0 Kudos
2 Replies
MR-T
Immortal
Immortal

The first server in the HA cluster will be the primary.

They act as rule interpreters and distributed database

Adding a new node requires that at least one primary be up.

The secondary nodes are slightly lighter-weight

esiebert7625
Immortal
Immortal

It's in this doc...

http://www.vmware.com/pdf/vi3_301_201_resource_mgmt.pdf

Primary and Secondary Hosts

When you add a host to an HA cluster, that host has to communicate with a primary host in the same cluster to complete its configuration (unless it’s the first host in the cluster, which makes it the primary host). The first hosts in the cluster become primary hosts, all others are secondary hosts. When a primary host goes down or is removed, HA automatically promotes another host to primary status. Primary hosts help to provide redundancy and are used to initiate failover actions.

If all the hosts in the cluster are not responding, and you add a new host to the cluster, HA configuration fails because the new host cannot communicate with any of the primary hosts. In this situation, you must disconnect all the hosts that are not responding before you can add the new host. The new host becomes the first primary host. When the other hosts become available again, their HA service is reconfigured.

Fyi…if you find this post helpful, please award points using the Helpful/Correct buttons.

-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-

Thanks, Eric

Visit my website: http://vmware-land.com

-=-=-=-=-=-=-=-=-=-=-==-=-=-=-=-=-=-=-=-=-=-=-

0 Kudos