Sizing for Production Controllers
For bare metal HA controllers, the following setup works for me
64GB ram, 500GB SSD, 2 x 10 core cpu, 10G Networking
I’ve had long standing controllers where the specs were far less and worked fine. It’s also slightly about planning and what you expect your usage to look like over the course of a few years. Concerning ^ controllers, I’m setting myself up for what I expect to be able to handle the load now and 5 years down the line.
On another side of our datacenter I have a juju controller that has a 1T spinning disk, 192GB ram, 2 x 6core cpu. It houses 100+ machines deployed over 20 models, ~10 reasonably active users. It’s been up for over a year. Here are the stats:
$ df -h
Filesystem Size Used Avail Use% Mounted on
udev 95G 0 95G 0% /dev
tmpfs 19G 1.9G 17G 11% /run
/dev/sda1 917G 18G 853G 3% /
tmpfs 95G 0 95G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 95G 0 95G 0% /sys/fs/cgroup
tmpfs 19G 0 19G 0% /run/user/1000
21:48:20 up 96 days, 18:36, 1 user, load average: 0.72, 0.58, 0.60
Nice to see its barely breaking a sweat!