How to use ecs_cpu_seconds_total metric

[KristianAsp]

Hi

I'm trying to graph a basic CPU utilization overview using the ecs_cpu_seconds_total for my ECS tasks but I'm struggling to get something that matches what I can see in Cloudwatch.

I've noticed most, if not all, of the examples online relating to node_exporter and its cpu metric relies on also recording the idle time, which I don't think we do here.

Any suggestions on what the PromQL query will look like that will accurately graph the CPU utilization in percentages?

I tried a range of similar queries to the following with no luck

avg(rate(ecs_cpu_seconds_total{ecs_service_name="prod-example", container!="ecs-exporter"}[1m]))

100 - (100 - (100 * (avg(rate(ecs_cpu_seconds_total{ecs_service_name="prod-example", container!="ecs-exporter"}[1m])))))

The 2nd one was an attempt to reverse-engineer what the idle metric would be (100% - current usage should give the idle?) but it's not right. I can see the right trends, i.e. spikes in CPU are correctly reflected in my own graphs, but the values are incorrect.

Any ideas?