I work for a media whose website gets around 300k views/day, installed on an OVH server.
When we've got the server, it was said to have 2x 500 GB of SSD storage, so we went with it and installed everything without checking which partition has space in it. After months in production, we're now unable to backup the website because the server runs out of space. After some quick check…
df -h gives this:
Filesystem Size Used Avail Use% Mounted on
udev 32G 0 32G 0% /dev
tmpfs 6.3G 1.3M 6.3G 1% /run
/dev/md3 20G 13G 6.1G 67% /
tmpfs 32G 0 32G 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 32G 0 32G 0% /sys/fs/cgroup
/dev/md2 487M 213M 246M 47% /boot
/dev/md4 449G 70M 426G 1% /home
/dev/nvme0n1p1 510M 6.1M 504M 2% /boot/efi
tmpfs 6.3G 0 6.3G 0% /run/user/0
First thing I notice is that / has only 20 GB mounted to it. Since the website is under /var/www/, it appears that it falls under that partition.
Second thing, 450 GB are mounted on /home, which is pretty weird for a server distribution of Ubuntu. It isn't supposed to host users and their desktop, downloads, etc., or is it?
What is needed now is a way to extend / or /var/www/ with /dev/md4 without losing data, and preferably without downtime (or much downtime, otherwise there might be SEO repercussions).
I have thought about copying /var/www to /home/www/ and then creating a sym-link between them, but I prefer to get some advice and suggestions prior of doing anything. I'm not the assigned dev (but an Editorial assistant, and there is no dev actually), so the duty falls on me and I don't want to screw things up; especially that there is no backup at the current time.
Another thing that I wonder about is where the 2nd 500 GB SSD storage is gone. I'll ask if it's been put as RAID-0 but I have some doubts.
Thank you.