Monitor an instance refresh using the AWS Management Console or AWS CLI - Amazon EC2 Auto Scaling
Monitor and check the status of an instance refreshInstance refresh statuses

Monitor an instance refresh using the AWS Management Console or AWS CLI

You can monitor an in progress instance refresh or look up the status of past instance refreshes from the last six weeks using the AWS Management Console or AWS CLI.

Monitor and check the status of an instance refresh

To monitor and check the status of an instance refresh, use one of the following methods:

Console
Tip

In this procedure, the named columns should already be displayed. To display hidden columns or change the number of rows shown, choose the gear icon on the top right corner of the section to open the preferences modal. Update the settings as needed and choose Confirm.

To monitor and check the status of an instance refresh (console)

  1. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/, and choose Auto Scaling Groups from the navigation pane.

  2. Select the check box next to the Auto Scaling group.

    A split pane opens up at the bottom of the page.

  3. On the Instance refresh tab, under Instance refresh history, you can determine the status of your request by looking at the Status column. The operation goes into Pending status while it's initializing. The status should then quickly change to InProgress. When all instances are updated, the status changes to Successful.

  4. You can further monitor the success or failure of in progress activities by viewing the group's scaling activities. On the Activity tab, under Activity history, when the instance refresh starts, you see entries when instances are terminated and another set of entries when instances are launched. If you have numerous scaling activities, you can see more of them by choosing the > icon at the top of the activity history. For information about troubleshooting issues that might cause activities to fail, see Troubleshoot issues in Amazon EC2 Auto Scaling.

  5. (Optional) On the Instance management tab, under Instances, you can review the progress of specific instances as needed.

AWS CLI
To monitor and check the status of an instance refresh (AWS CLI)

Use the following describe-instance-refreshes command.

aws autoscaling describe-instance-refreshes --auto-scaling-group-name my-asg

The following is example output.

Instance refreshes are ordered by start time. Instance refreshes still in progress are described first. 

{
  "InstanceRefreshes":[
    {
      "InstanceRefreshId":"08b91cf7-8fa6-48af-b6a6-d227f40f1b9b",
      "AutoScalingGroupName":"my-asg",
      "Status":"InProgress",
      "StatusReason":"Waiting for instances to warm up before continuing. For example: i-0645704820a8e83ff is warming up.",
      "StartTime":"2023-11-24T16:46:52+00:00",
      "PercentageComplete":50,
      "InstancesToUpdate":0,
      "Preferences":{
        "MaxHealthyPercentage":120,
        "MinHealthyPercentage":90,
        "InstanceWarmup":60,
        "SkipMatching":false,
        "AutoRollback":true,
        "ScaleInProtectedInstances":"Ignore",
        "StandbyInstances":"Ignore"
      }
    },
    {
      "InstanceRefreshId":"0e151305-1e57-4a32-a256-1fd14157c5ec",
      "AutoScalingGroupName":"my-asg",
      "Status":"Successful",
      "StartTime":"2023-11-22T13:53:37+00:00",
      "EndTime":"2023-11-22T13:59:45+00:00",
      "PercentageComplete":100,
      "InstancesToUpdate":0,
      "Preferences":{
        "MaxHealthyPercentage":120,
        "MinHealthyPercentage":90,
        "InstanceWarmup":60,
        "SkipMatching":false,
        "AutoRollback":true,
        "ScaleInProtectedInstances":"Ignore",
        "StandbyInstances":"Ignore"
      }
    }
  ]
}

You can further monitor the success or failure of in progress activities by viewing the group's scaling activities. The scaling activities also help you drill in for more details to help you troubleshoot issues with an instance refresh. For more information, see Troubleshoot issues in Amazon EC2 Auto Scaling.

Instance refresh statuses

When you start an instance refresh, it enters the Pending status. It passes from Pending to InProgress until it reaches Successful, Failed, Cancelled, RollbackSuccessful, or RollbackFailed.

An instance refresh can have the following statuses:

Status Description
Pending The request was created, but the instance refresh has not started.
InProgress An instance refresh is in progress.
Successful An instance refresh completed successfully.
Failed An instance refresh failed to complete. You can troubleshoot using the status reason and the scaling activities.
Cancelling An ongoing instance refresh is being cancelled.
Cancelled The instance refresh is cancelled.
RollbackInProgress An instance refresh is being rolled back.
RollbackFailed The rollback failed to complete. You can troubleshoot using the status reason and the scaling activities.
RollbackSuccessful The rollback completed successfully.
Baking Waiting the specified bake time after an instance refresh has finished updating instances.