ZLB is a great product, and we have been using it in the core of our virtual network for a number of years, unfortunately sometimes you can end up with a Farm unable to start.
I have just seen this recently when I updated a L4TZNAT farm and then forgot to enter a “weight” for the new Physical Server. I was able to save the config, but immediately the Farm went off line and would not restart.
After a short panic, I remembered an e-mail which I had received from Emilio (the guy who writes the software). Using PUTTY I was able to find and edit the config file.
Here are the steps:
- Use Putty to connect to the Master ZLB Node
- cd /usr/local/zenloadbalancer/config
Now look for the file which matches the Farm name, for example
Farm Name: Reciever
Farm Type: TX4NAT
Config File: Receiver_14txnat.cfg
- Now use VI to edit the file
As you can see, my second server is missing a ;1; this was stopping the farm for starting.
Adding the extra 1 and saving the config file fixed the issue, and the Farm will now start.