Upgrading to 2026.42.2

Control Plane 2026.42.2 upgrade guide.

Grant ec2:DescribeSubnets to AWS Private Locations#

Who is affected: users with AWS Private Locations who manage the Control Plane IAM policy themselves.

What Changed#

The Control Plane reads the free IP addresses of your subnets to deploy load generators in the subnets with the most room.

Migration Guide#

Add ec2:DescribeSubnets to the statement of your GatlingControlPlaneEc2Policy that allows ec2:DescribeInstances:

{
    "Effect": "Allow",
    "Action": [
        "ec2:DescribeImages",
        "ec2:DescribeInstances",
        "ec2:DescribeSubnets"
    ],
    "Resource": "*"
}

See the full policy.

Backward Compatibility#

The permission is optional. Without it, subnets are tried in random order and the Control Plane logs a 'ec2:DescribeSubnets' not authorized warning.

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