/var/log/ssl/miraheze-renewal.log was 25GB and contained a lot of "Lock 140340809382544 not acquired on /tmp/tmp_file.lock, waiting 0.05 seconds" entries. I deleted the file but disk space is still full for some reason.
After reboot getting
Error: Connection to https://puppet141.miraheze.org:8140/puppet/v3 failed, trying next route: Request to https://puppet141.miraheze.org:8140/puppet/v3 failed after 0.001 seconds: Failed to open TCP connection to puppet141.miraheze.org:8140 (Connection refused - connect(2) for "puppet141.miraheze.org" port 8140)
when trying to run puppet