Configuring Multiple Hot Spares (Vlb Only) - Coyote Point Systems E350GX Installation And Administration Manual

Appendix F: Equalizer VLB
The following examples show you how to use Smart Events in an Equalizer VLB configuration. We assume that you
have already configured Equalizer to work with an existing VMware installation, by supplying the appropriate login
information on the
Equalizer > Clusters > VLB
Note – VLB-related Smart Event functions require that the VMTools software is installed on your Virtual Machine
servers. This is usually added after a Virtual Machine is created. See the VMware documentation for instructions.

Configuring Multiple Hot Spares (VLB Only)

The server flag is used to designate a single hot spare server in a cluster. In some cases, you may want to
hot spare
designate multiple hot spare servers for a cluster. This can be done using Smart Events.
For example, assume a cluster that has three servers:
actively pass traffic and the other two servers act as successive hot spares. That is,
option enabled while
quiesce
unavailable, we want
sv02
To accomplish this, we'll create three Smart Events to be evaluated whenever Equalizer processes cluster events:
If the first server is running, enable the quiesce option on the other two servers; otherwise, do nothing.
Event 1:
If the first server is not running and the second server is, enable the quiesce option on the first and third
Event 2:
servers, and disable it on the second server; otherwise, do nothing.
If both the first server and the second server are not running, enable the quiesce option on the first and
Event 3:
second servers, and unquiesce the third server; otherwise, do nothing.
To create Event 1:
1. Right-click on the cluster name in the left frame and select
2. Type in an event name, such as
editor.
Event Trigger
3. In the field, click
functions
arrow next to
running
4. Click the next icon (
>
5. In the field, click
functions
arrow next to
quiesce
6. In the field, click
operators
7. In the field, click
functions
arrow next to
quiesce
8. Click the next icon (
>
the right frame.
To create Event 2:
300
tab.
is running. If
sv00 sv00
to take over.
, or accept the default. Click the next icon (
activate-sv00
. In the
running expression workbench
. Select and click
sv00 accept
)at top to open the
Event Action
. In the
quiesce expression workbench
. Select and click
sv01 accept
.
&&
. In the
quiesce expression workbench
. Select and click
sv02 accept
)at top, and then to create the event. The Configuration tabs for the event open in
commit
, , and . As long as it is up, we want
sv00 sv01 sv02
fails, we want to take over. If both
sv01
from the menu:
Add Event
field at bottom, click on the drop-down
. The
expression workbench
editor.
field at bottom, click on the drop-down
.
field at bottom, click on the drop-down
. The
expression workbench
Equalizer Installation and Administration Guide
sv00
and will have the
sv01 sv02
and
sv00 sv01
)at top to open the
>
should now look like this:
should now look like this:
to
are