Fairly recently, I've noticed these warnings appearing when running apt update. I have tried importing the keys from the repositories in question, but that has not remediated the issue.
root@modron:/home/luna# apt update
Hit:1 http://deb.debian.org/debian trixie InRelease
Hit:2 http://deb.debian.org/debian trixie-updates InRelease
Hit:3 http://deb.debian.org/debian trixie-backports InRelease
Hit:4 http://security.debian.org trixie-security InRelease
Hit:6 https://download.docker.com/linux/debian trixie InRelease
Hit:7 https://github.armbian.com/configng stable InRelease
Get:5 http://armbian.lv.auroradev.org/apt trixie InRelease [62.3 kB]
Err:5 http://armbian.lv.auroradev.org/apt trixie InRelease
Sub-process /usr/bin/sqv returned an error code (1), error message is: Missing key DF00FAF1C577104B50BF1D0093D6889F9F0E78D5, which is needed to verify signature. Missing key 8CFA83D13EB2181EEF5843E41EB30FAF236099FE, which is needed to verify signature.
Fetched 62.3 kB in 1s (67.6 kB/s)
10 packages can be upgraded. Run 'apt list --upgradable' to see them.
Warning: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. OpenPGP signature verification failed: http://armbian.lv.auroradev.org/apt trixie InRelease: Sub-process /usr/bin/sqv returned an error code (1), error message is: Missing key DF00FAF1C577104B50BF1D0093D6889F9F0E78D5, which is needed to verify signature. Missing key 8CFA83D13EB2181EEF5843E41EB30FAF236099FE, which is needed to verify signature.
Warning: Failed to fetch http://apt.armbian.com/dists/trixie/InRelease Sub-process /usr/bin/sqv returned an error code (1), error message is: Missing key DF00FAF1C577104B50BF1D0093D6889F9F0E78D5, which is needed to verify signature. Missing key 8CFA83D13EB2181EEF5843E41EB30FAF236099FE, which is needed to verify signature.
Warning: Some index files failed to download. They have been ignored, or old ones used instead.
This started happening fairly recently. If my Docker containers are left running for a period of time, this message will start appearing over and over in journalctl: dockerd[1491]: time="2025-12-27T20:55:44.808894213-05:00" level=error msg="Error writing log message" driver=json-file error="error writing log entry: write /var/lib/docker/containers/97e823567c56600b69888e6abf63189c6f586afbf6bcf06fca820eaf4ef46f7d/97e823567c56600b69888e6abf63189c6f586afbf6bcf06fca820eaf4ef46f7d-json.log: no space left on device" message= After a while, these two messages will start repeating (these were taken from a different instance of this happening, so the PID is different): rsyslogd[599]: action 'action-0-builtin:omfile' (module 'builtin:omfile') message lost, could not be processed. Check for additional error messages before this one. [v8.2504.0 try https://www.rsyslog.com/e/2027 ] rsyslogd[599]: file '/var/log/syslog'[7] write error - see https://www.rsyslog.com/solving-rsyslog-write-errors/ for help OS error: No space left on device [v8.2504.0 try https://www.rsyslog.com/e/2027 ] Looking at btop when this is happening shows that the rsyslog and dockerd processes are using up most of the CPU, along with fail2ban for some reason. The full command for dockerd is: /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock Here are all my docker packages: docker-buildx-plugin/trixie,now 0.30.1-1~debian.13~trixie arm64 [installed] docker-ce-cli/trixie,now 5:29.1.3-1~debian.13~trixie arm64 [installed] docker-ce/trixie,now 5:29.1.3-1~debian.13~trixie arm64 [installed] docker-compose-plugin/trixie,now 5.0.0-1~debian.13~trixie arm64 [installed]