It’s worth running a cleanup. Please post details of what happened. Here’s one I once did:
root@ubuntu-2gb-nbg1-1:/var/discourse# df -h /
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 19G 12G 6.5G 65% /
root@ubuntu-2gb-nbg1-1:/var/discourse# ./launcher cleanup
WARNING! This will remove all stopped containers.
Are you sure you want to continue? [y/N] y
Total reclaimed space: 0B
WARNING! This will remove all images without at least one container associated to them.
Are you sure you want to continue? [y/N] y
Deleted Images:
deleted: sha256:33ce56b3484175342191a344fe1aa9f330431de7bf6f0f0e14f75c5bd851a5b0
deleted: sha256:5e04a0411f813e8f2c1a50d84a7d7bb1b17a855ce041730cf8e3b2fb90144b19
untagged: discourse/base:2.0.20200512-1735
untagged: discourse/base@sha256:7f6c5be23a8e4237cecafaca9d041de5964f8237345b7b183cebdee1f73ed024
deleted: sha256:991acdba0b1f18141192f8682bc5ec1c3365dff0d4fa1c6504e6ce0e3ae6dd76
deleted: sha256:e1c41c8dbd697ae0a61ca612c61f085f69f5bf74c4269cf5c68b4de0fec723fa
deleted: sha256:c2adabaecedbda0af72b153c6499a0555f3a769d52370469d8f6bd6328af9b13
untagged: discourse/base:2.0.20200724-1815
untagged: discourse/base@sha256:1d5eb2f8eae84203b28d3c643648d0dd7d213c2055865cfa5132e30db9e365d5
Total reclaimed space: 2.591GB
# df -h /
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 19G 8.7G 9.3G 49% /
It’s worth taking a detailed view of disk usage and posting it here too! See for example
If you have any backups on the system, you should download them, test them, and delete all but the latest. If under extreme pressure, delete the latest too. (In my case, I make sure the copy I downloaded is also covered by my own personal offsite backup first. Always have at least two copies.)
Aside from du, which answers questions at the OS level, you can ask questions at the docker level. Please post your detailed findings!
# docker volume ls -qf dangling=true
# docker images -a
It is difficult to juggle disk usage on a 25G instance - I did it for a long time, using up time and making use of sysadmin experience. Eventually I switched providers, paid less and got 40G and that was much better.
See also previously
Discourse upgrade fails due to insufficient disk space on 25G droplet