Christoph Kutzinski kutzi

CPU: percentage of limit

A lot of people land when trying to find out how to calculate CPU usage metric correctly in prometheus, myself included! So I'll post what I eventually ended up using as I think it's still a little difficult trying to tie together all the snippets of info here and elsewhere.

This is specific to k8s and containers that have CPU limits set.

To show CPU usage as a percentage of the limit given to the container, this is the Prometheus query we used to create nice graphs in Grafana:

sum(rate(container_cpu_usage_seconds_total{name!~".*prometheus.*", image!="", container_name!="POD"}[5m])) by (pod_name, container_name) /

	cat > /etc/yum.repos.d/CentOS-Stream-AppStream.repo << EOF
	# CentOS-Stream-AppStream.repo
	#
	# The mirrorlist system uses the connecting IP address of the client and the
	# update status of each mirror to pick current mirrors that are geographically
	# close to the client. You should use this for CentOS updates unless you are
	# manually picking other mirrors.
	#
	# If the mirrorlist does not work for you, you can try the commented out
	# baseurl line instead.

	---
	- name: Create Instance in AWS
	hosts: localhost
	connection: local
	gather_facts: false

	vars:
	aws_access_key: "xxxxxx"
	aws_secret_key: "xxxxxx"
	security_token: "xxxxxx"

	kubectl get pods --all-namespaces --sort-by='.metadata.name' -o jsonpath='{.items[].spec.containers[].resources.limits.memory}'

	kubectl get pod --all-namespaces --sort-by='.metadata.name' -o json \| jq -r '[.items[] \| {pod_name: .metadata.name, containers: .spec.containers[] \| [ {container_name: .name, memory_requested: .resources.requests.memory, cpu_requested: .resources.requests.cpu} ] }]'