This question pops up from time to time on the VMTN community forums on how to increase the size of /var/log on vMA. By default, the /var/log partition is configured to ~500MB, which is a decent size for system logs, but one of the features of vMA is vilogger which adds a syslog capability for your ESX and ESXi hosts. This allows you to ship all your host logs over to vMA, the problem is the logs are also stored in /var/log along with vMA's system logs. If you are managing several dozen hosts, you can easily fill up this partition using the default configured size.
With vMA 4.0, it was pretty trivial to increase/resize partitions within vMA using LVM and I had written a quick guide on how to do this - How to increase/resize vMA Disks. With the release of vMA 4.1, VMware kind of went backwards and decided not to leverage LVM and lost the benefits with using a volume manager. Resizing the partitions can still be accomplished but it requires a few additional steps and tools. I will show you two methods in which you can increase your /var/log partition, primarily to accommodate larger number of hosts to utilize the vilogger functionality.
Option1: Resize /var/log using gparted
Here is what a default vMA disk layout looks like and note the size of /var/log
gparted live CD ISO, in this example I am using gparted 0.3.4-11, it is what I have available on my datastore.
Next, you will want to attach the gparted ISO to vMA, you probably will need to add a CD-ROM drive since vMA does not come with one by default. Once you power vMA on, you will need to hit ESC to and select boot from CD-ROM. You should be able to just accept all the defaults and once gparted is loaded, you should see the following screen or something similar depending on the version of gparted you are using.
Option2: Add a new virtual disk and reconfigure vilogger syslog location
If you did not want to go through the process in option 1 and just want to add another virtual disk and dedicate that for vilogger syslog, you can actually change the path of the logs in /etc/vmware/vMA/vMA.conf. You can control not only the vilogger syslog but also vi-fastpass logs and vilogger daemon logs, but we will only change the "vMALogCollector" which is basically the vilogger syslog component.