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Set Up Scheduled EC2 Instance Patching
A configuration guide for setting up the necessary configuration for AWS Systems Manager Patch Manager to automatically scan and/or apply patches to EC2 instances in an AWS environment.
Scheduling and Automation
AWS Systems Manager Maintenance Windows let you define a schedule for when to perform potentially disruptive actions on your instances such as patching an operating system, updating drivers, or installing software or patches.
The main configuratin items for a Maintenance Window:
- Schedule: Define the recurring schedule, start time, duration, and cutoff time for the window.
- Targets: Define the target EC2 instances associated with this window (Based on Tags).
- Tasks: Define the tasks that are run during the window.
Maintenance Window Schedule
Define Targets
Define Task Settings
Enable Logging (Optional)
Enable Notifications (Optional)
Patch Baseline
A patch baseline defines which patches are approved for installation on your instances. You can specify approved or rejected patches one by one. You can also create auto-approval rules to specify that certain types of updates (for example, critical updates) should be automatically approved.