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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteA production patching process for Ubuntu servers should separate what may change from when and where changes run. Define package scope and restart policy first, then use Ansible to apply updates and AWX workflows to stage cohorts, control promotion, and retain an audit trail. Validate the application—not just SSH connectivity—before returning a host to service.
Set patch policy before scheduling a run
Write down the policy that AWX is meant to execute. At minimum, decide which Ubuntu releases and repository origins are in scope, whether a run is security-only or broader, which hosts are eligible, when service restarts and reboots may happen, and who can approve them. Ubuntu’s automatic-updates documentation explains how unattended-upgrades is configured, including allowed origins, reboot behavior, and logging.
- Choose the package scope. A security-only policy and a broad package upgrade are different operational changes. Do not label a general upgrade “security-only” unless the configured repositories and selection method actually enforce that scope.
- Decide how scheduled AWX runs coexist with unattended upgrades. Ubuntu Server includes
unattended-upgradesby default. It may apply updates independently of AWX, so define whether it remains enabled, how overlapping package activity is detected or prevented, and how its restart behavior fits the maintenance policy. - Record repository exceptions. Ubuntu’s default origins include official archive origins and, where available, ESM origins; third-party repositories and PPAs need separate configuration. Review package holds and exceptional packages deliberately rather than treating exclusions as a permanent patch strategy.
- Set guardrails. Decide whether a run must fail if package changes would remove packages, and what constitutes a failed preflight, a host-level failure, or a promotion stop.
Ubuntu security fixes are generally backported for supported releases rather than delivered by moving a server to a newer release. Support varies by release and repository component. Check the Ubuntu security-updates guidance against the components and releases you actually use; do not assume every package has identical coverage.
Choose the Ansible operation deliberately
The ansible.builtin.apt module can refresh package metadata and select an upgrade operation. Make the operation explicit: the module documents upgrade: dist as using apt-get dist-upgrade. That is not interchangeable with installing the latest version of a named package, nor is either automatically a security-only policy.
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A focused task for a deliberately broad upgrade could look like this:
- name: Refresh package metadata and perform the approved upgrade
ansible.builtin.apt:
update_cache: true
cache_valid_time: 3600
upgrade: dist
fail_on_autoremove: trueThis example uses a one-hour cache-validity interval; set it to match the run’s freshness requirements or omit it if the policy requires a refresh each time. fail_on_autoremove: true makes the task fail rather than proceed when the operation would remove packages. That is a useful guardrail when removals require separate review, but it does not replace reviewing the proposed transaction.
Check mode is useful as a prediction aid. For example, from a configured Ansible project and inventory, an operator might run ansible-playbook patch.yml --check --limit ubuntu_canary. It can show predicted changes for supported tasks; it does not prove compatibility, reproduce a real reboot, or validate application behavior. Test the playbook against a representative non-production server before using it on production hosts.
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Validate the target set, then stage the rollout
Inventory should make rollout cohorts explicit—for example, a low-risk canary group followed by service, region, or redundancy cohorts. There is no universally correct batch size: choose one that preserves capacity and gives operators enough time to detect and recover from a problem before the next group advances.
Before package changes, verify the following:
- The selected inventory group contains the intended hosts and Ubuntu versions.
- Connectivity, credentials, and privilege escalation work for that group.
- The first cohort is representative enough to expose relevant package, application, and reboot risks.
- The maintenance window and service restart policy are approved for the affected workloads.
- Operators know how a failed host is isolated, investigated, and retried rather than blindly promoted.
Where a service has load balancing or redundancy, take a node out of rotation before patching when the service’s operating procedure supports it. Restore it only after the application-level checks pass.
Build an AWX workflow with real promotion gates
In AWX 24.6.1, workflows connect job templates, other workflow templates, project syncs, and inventory syncs into a single run. Use the workflow graph to represent the operational sequence, not merely to chain patch jobs. See the AWX 24.6.1 documentation for workflows, workflow job templates, and job templates.
A practical graph can use distinct nodes for these stages:
- Preflight: check the target set, connectivity, release expectations, and any service-specific eligibility conditions.
- Canary: patch the limited first cohort and collect its package and host results.
- Promotion decision: continue only when the defined fleet and service checks succeed. A failed preflight should stop the run; a failed host should be investigated before retry or promotion.
- Later cohorts: run the approved sequence, including reboot handling when needed, with cohort size and pacing appropriate to service criticality and recovery capacity.
- Post-run validation: check application health and fleet state before declaring the maintenance run complete.
AWX records workflow jobs and the status of constituent jobs, but a green job is not itself an operational health definition. Make promotion conditions meaningful for the service: for example, require the application’s own health endpoint or monitoring signal to pass, rather than treating successful package installation as sufficient.
Keep secrets in AWX credential objects and restrict launch permissions to the people responsible for the operation. AWX distinguishes permissions for job templates and workflows. Review which project and inventory source a launch will use, and retain job results so the operator can establish what ran and on which hosts.
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Plan service restarts and reboots separately
Package updates can replace libraries used by running services, which may require those services to restart. Starting with Ubuntu 24.04 LTS, needrestart restarts affected services automatically by default, subject to configured exceptions. That default can be unsuitable for a critical workload if the restart occurs outside its approved window. Plan restart timing, configure exceptions through supported drop-in mechanisms where necessary, or block a known problematic package only when there is a sound operational reason.
A kernel update or another change may require a reboot. Ubuntu’s unattended-upgrades reboot setting defaults to false, but that setting does not govern an Ansible reboot task. Treat reboot as a planned workflow stage with an appropriate host-specific timeout. The ansible.builtin.reboot module waits for the host to go down and become responsive again. Its timeout applies separately to reboot detection and test-command success, so total elapsed time can reach twice the configured timeout.
Host responsiveness is only a transport-level signal. After the reboot task returns, check the required service and application health before restoring the node to traffic or advancing the rollout.
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Use the AWX results together with service monitoring to establish whether the intended maintenance actually completed. Review host-level task outcomes; a successful workflow summary should not hide a failed or skipped machine.
- Confirm the host is still on the intended Ubuntu release and that the expected package tasks completed.
- Check reboot-required state where relevant, then verify service status and application-level health.
- Confirm monitoring signals and load-balancer membership reflect the host’s actual condition.
- Record failed hosts, approved exceptions, and unresolved work in the fleet’s compliance view rather than silently excluding them.
- Use the results to adjust cohort sequencing, timeout values, and maintenance windows for future runs.
Account for Ubuntu Pro and kernel maintenance
Ubuntu Pro’s Expanded Security Maintenance and Canonical Livepatch address different support needs. Check the Ubuntu Pro services overview for current scope and eligibility for the releases and packages in your fleet.
Livepatch applies fixes for high- and critical-severity kernel vulnerabilities without rebooting when those issues are within its coverage. It can narrow the interval before applicable kernel fixes are installed, but it does not replace normal kernel updates. Canonical’s Livepatch documentation says standard kernel updates should still be installed through normal tools, including fixes outside Livepatch scope. Keep conventional kernel upgrades and the reboots they require in the maintenance plan.
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