Description of Changes

Fixes loss of admin-vm logs when they are generated while the Internet is down and the VM reboots before connectivity returns.

The root cause was that we were persisting Alloy’s state (/var/lib/private/alloy) on admin-vm, which includes the loki.source.journal cursor. The source advanced its cursor pre-reboot even though some entries had not yet reached loki.write (where the WAL append happens). After reboot, the persisted cursor skipped those entries, so nothing was resent.

Type of Change

• New Feature
• Bug Fix
• Improvement / Refactor

Related Issues / Tickets

https://jira.tii.ae/browse/SSRCSP-7024

Checklist

• Clear summary in PR description
• Detailed and meaningful commit message(s)
• Commits are logically organized and squashed if appropriate
• Contribution guidelines followed
• Ghaf documentation updated with the commit - https://tiiuae.github.io/ghaf/
• Author has run make-checks and it passes
• All automatic GitHub Action checks pass - see actions
• Author has added reviewers and removed PR draft status

Testing Instructions

Applicable Targets

• Orin AGX aarch64
• Orin NX aarch64
• Lenovo X1 x86_64
• Dell Latitude x86_64
• System 76 x86_64

Installation Method

• Requires full re-installation
• Can be updated with nixos-rebuild ... switch
• Other:

Test Steps To Verify:

1. Boot a fresh ghaf image on Lenovo-X1 without internet (eth cable) connection
2. Create user account, log in, open terminal
3. cat /etc/common/device-id (and write down the id)
4. ssh ghaf@admin-vm
5. sudo logger --priority=user.info --tag=myjob "logtest0 - admin"
6. Reboot the laptop
7. Connect to internet, verify the connection by 'ping google.com' from terminal
8. ssh ghaf@admin-vm
9. sudo logger --priority=user.info --tag=myjob "logtest1 - admin"
10. Log in to grafana https://ghaflogs.vedenemo.dev/explore
11. Select filters: machine = device-id / host = admin-vm / Line contains: logtest
12. Select time frame (upper right corner) to cover steps from 4 (e.g. Last 15 minutes)
13. Hit "Run query"
14. Grafana lists both log lines:
    logtest0 - admin logtest1 - admin