Collect Amazon EC2 instance store volume NVMe driver metrics

For CloudWatch agent to collect AWS NVMe driver metrics for instance store volumes attached to an Amazon EC2 instance, add the diskio section inside the metrics_collected section of the CloudWatch agent configuration file.

Additionally, the CloudWatch agent binary requires ioctl permissions for NVMe driver devices to collect metrics from attached instance store volumes.

The following metrics can be collected.

Metric	Metric name in CloudWatch	Description
instance_store_total_read_ops	diskio_instance_store_total_read_ops	The total number of completed read operations.
instance_store_total_write_ops	diskio_instance_store_total_write_ops	The total number of completed write operations.
instance_store_total_read_bytes	diskio_instance_store_total_read_bytes	The total number of read bytes transferred.
instance_store_total_write_bytes	diskio_instance_store_total_write_bytes	The total number of write bytes transferred.
instance_store_total_read_time	diskio_instance_store_total_read_time	The total time spent, in microseconds, by all completed read operations.
instance_store_total_write_time	diskio_instance_store_total_write_time	The total time spent, in microseconds, by all completed write operations.
instance_store_performance_exceeded_iops	diskio_instance_store_performance_exceeded_iops	The total time, in microseconds, that IOPS demand exceeded the volume's IOPS maximum performance.
instance_store_performance_exceeded_tp	diskio_instance_store_performance_exceeded_tp	The total time, in microseconds, that throughput demand exceeded the volume's maximum throughput performance.
instance_store_volume_queue_length	diskio_instance_store_volume_queue_length	The number of read and write operations waiting to be completed.