Production Change Record

Change MetadataCopy Anchor Link

• Change id: CR-2026-04-15-tier1-backup-timer-rollout
• Date and time (UTC): 2026-04-15 20:55-20:58
• Requester: owner
• Approver (owner): owner
• Executor: GitHub Copilot agent (owner-approved command execution)
• Environment: VPS production
• Related ticket or incident id: phase5-backup-baseline

ScopeCopy Anchor Link

• Services or stacks affected: database backup operations only (runtime/stacks/infrastructure/databases scripts + systemd timer)
• Expected impact: no direct user-facing route changes; light host I/O during backup jobs
• User-facing risk window: minimal to none during scheduled backup runs

Risk AssessmentCopy Anchor Link

• Risk level: medium
• Main failure modes: disk pressure, credential mismatch in env, timer misconfiguration
• Data integrity impact if failed: missing or incomplete backup artifacts

PreconditionsCopy Anchor Link

• Owner approval captured.
• Backup or rollback checkpoint confirmed.
• Validation plan prepared.
• Communication plan prepared.

Execution PlanCopy Anchor Link

1. Run dry-run preview for db-backup.sh.
2. Run dry-run preview for install-tier1-backup-timer.sh.
3. Install and enable tier1-db-backup.timer, then run one manual backup pass.

Rollback PlanCopy Anchor Link

1. Disable and stop tier1-db-backup.timer.
2. Remove timer and service units from /etc/systemd/system/.
3. Reload systemd daemon and confirm timer is absent.

Validation ResultsCopy Anchor Link

• Route validation: not applicable (no route changes)
• Health validation: tier1-db-backup.timer active and next run scheduled (OnCalendar=hourly)
• Auth and access validation: backup scripts read runtime env and completed backup artifacts for postgres/mysql/mongodb/mssql
• Log and alert review: systemd timer status/list captured; manifest checksum entries verified

Evidence ReferencesCopy Anchor Link

• Evidence file: /home/repo/contabo-server-setup/tmp/backups/evidence/tier1-backup-evidence-20260415T205803Z.txt
• Backup folder: /home/repo/contabo-server-setup/tmp/backups/tier1-20260415T205728Z
• Manifest file: /home/repo/contabo-server-setup/tmp/backups/tier1-20260415T205728Z/manifest.csv
• Sample checksum row: 20260415T205728Z,postgres,/home/repo/contabo-server-setup/tmp/backups/tier1-20260415T205728Z/postgres/postgres-20260415T205728Z.sql.gz,58471b1a04bcfaa606c5aa7a5888d17b35a75831a224f2efed804821b421a77a,1047

OutcomeCopy Anchor Link

• Result: success
• Start time (UTC): 2026-04-15T20:57:15Z
• End time (UTC): 2026-04-15T20:58:03Z
• Follow-up actions: first restore drill completed at docs/operations/restore-validations/rv-20260415t210554z-postgres-tier1.mdx; define offsite backup target
• Owner sign-off: pending