Add note on IAM permissions

Signed-off-by: Sean Smith <[email protected]>

CHANGELOG.rst

@@ -17,7 +17,7 @@ x.x.x
 * Add support for ap-east-1 region (Hong Kong)
 * Add possibility to specify instance type to use when building custom AMIs with ``pcluster createami``
 * Speed up cluster creation by having compute nodes starting together with master node. **Note** this requires one new IAM permissions in the `ParallelClusterInstancePolicy <https://docs.aws.amazon.com/en_us/parallelcluster/latest/ug/iam.html#parallelclusterinstancepolicy>`_, ``cloudformation:DescribeStackResource``
-* Enable ASG CloudWatch metrics for the ASG managing compute nodes
+* Enable ASG CloudWatch metrics for the ASG managing compute nodes. **Note** this requires two new IAM permissions in the `ParallelClusterUserPolicy <https://docs.aws.amazon.com/parallelcluster/latest/ug/iam.html#parallelclusteruserpolicy>`_, ``autoscaling:DisableMetricsCollection`` and ``autoscaling:EnableMetricsCollection``
 * Install Intel MPI 2019u4 on Amazon Linux, Centos 7 and Ubuntu 1604
 * Upgrade Elastic Fabric Adapter (EFA) to version 1.4.1 that supports Intel MPI
 * Run all node daemons and cookbook recipes in isolated Python virtualenvs. This allows our code to always run with the