Better description of ha-config command?

[aborzenkov]

Documentation is not entirely helpful. It just tells "use ha-config to modify settings as needed" without explaining when and which modifications are needed. KB does add to confusion without explaining anything either.

Could someone give simple table of which settings would be required for the following three cases:

single chassis, single controller standalone

single chassis, dual controller

single chassis, single controller as part of HA pair

Thank you!

[grahamhand]

Bit late to the party, the command to modify the chassis/controller config is:

ha-config modify <chassis|controller> <ha|non-ha>

Thus the 3 scenarios you outlined above would look like this:

single chassis, single controller standalone

*> ha-config show

       Chassis HA configuration: non-ha

       Controller HA configuration: non-ha

single chassis, dual controller

*> ha-config show

       Chassis HA configuration: ha

       Controller HA configuration: ha

single chassis, single controller as part of HA pair

*> ha-config show

       Chassis HA configuration: ha

       Controller HA configuration: ha

Hope this helps

--Graham

[aborzenkov]

Thanks. Would you be so kind …

1. Ha-config also offers option “auto”. What does it do exactly?

2. Could you explain why we need different options for chassis and controller? From your example it follows that either system is HA pair or not. Under which conditions would “chassis” and “controller” setting differ?

[scottgelb]

Agreed. We had to set to auto on one and ha on The other setting at one customer to get cluster working.

[scottgelb]

Found this in my notes... for a FAS3240 2 chassis we had to set

ha-config modify chassis ha

ha-config modify controller default 

[grahamhand]

I can't find a reference to in the documentation to an auto switch but there is a default (controller switch only) which basically tells the controller to check for a partner and if it's configured as HA to switch it's identity to HA.  As for why the two have to be set separately I have no idea.  Could be something that may differ between 7-mode and C-mode.