Deploy and maintenance

In-place patching, deploys, and reboots stop the application from answering. If aggregation is included, Auto Scaling may replace the instance even though the outage is expected. Use suppressionsuppression
Pause evaluation on an instance for a duration so deploys and reboots do not look impaired. for a bounded window. The Verify lab runs enable and disable in order, with the console result after each command.

Option A: Suppress (bounded windows)

Instance-level. Pass a duration, or omit it to suppress until you disable.

aws ec2 enable-application-status-check-suppression \
  --instance-ids "$INSTANCE_ID" \
  --duration-seconds 3600

Overall status reports suppressed. Auto Scaling does not act. The instance card shows Application status Suppressed; the per-check line can still be passed.

Resume early:

aws ec2 disable-application-status-check-suppression \
  --instance-ids "$INSTANCE_ID"

Tip

Deploy tools with pre/post hooks: enable suppression in the pre-hook with a duration that covers the window, deploy, then disable in the post-hook. If the tool has no hooks, drive this from the pipeline that invokes it.

Option B: Exclude from aggregation

Keep evaluating and reporting individual status, but do not affect overall status or Auto Scaling. Use this for a long validation of a new check version.

aws ec2 modify-application-status-check \
  --application-status-check-id "$ASC_ID" \
  --aggregation excluded

Option C: Disassociate

For indefinite removal from a subset of instances, disassociate or drop the matching tag. Overall status becomes not-applicable.