Leonardo Gregianin leogregianin

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) /

Object Calisthenics outlines 9 basic rules to apply when performing the exercise:

One level of indentation per method.
Don't use the ELSE keyword.
Wrap all primitives and Strings in classes.
First class collections.
One dot per line.
Don't abbreviate.
Keep all classes less than 50 lines.
No classes with more than two instance variables.

	from xml.etree import ElementTree
	from lxml.etree import XML
	import xmltodict
	import untangle
	from benchmarker import Benchmarker

	N = 1000 * 1
	N = 1000 * 100

	xml_string = """<?xml version="1.0"?>

	# -- coding: utf-8 --
	from __future__ import unicode_literals

	from django.db import migrations, models
	from django_cryptography.fields import encrypt

	app_with_model = 'account'
	model_with_column = 'User'
	column_to_encrypt = 'email_address'
	column_field_class = models.CharField

	"""Turtle module http://cursodepython.com.br"""
	import turtle

	turtle.bgcolor("black")
	turtle = turtle.Turtle()
	turtle.shape("turtle")
	turtle.speed(3)
	turtle.width(10)
	turtle.color("blue", "yellow")
	turtle.pencolor("red")

	from django.db import models

	class Person(models.Model):
	name = models.CharField(max_length=200)
	groups = models.ManyToManyField('Group', through='GroupMember', related_name='people')

	class Meta:
	ordering = ['name']

	def __unicode__(self):

	LOGGING = {
	'version': 1,
	'disable_existing_loggers': False,
	'handlers': {
	'mail_admins': {
	'level': 'ERROR',
	'class': 'django.utils.log.AdminEmailHandler'
	},
	'null': {
	'level':'DEBUG',

	Install Python 3.7.0 on CentOS/RHEL 7

	1.Requirements:

	yum install gcc openssl-devel bzip2-devel

	2.Download Python 3.7:

	cd /usr/src
	wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz

	sudo apt-get update
	sudo apt-get install python3-pip python3-dev libpq-dev postgresql postgresql-contrib nginx

	sudo -u postgres psql

	- paste this code in postgres console:
	CREATE DATABASE django_project;
	CREATE USER username WITH PASSWORD 'pass1234';
	ALTER ROLE username SET client_encoding TO 'utf8';
	ALTER ROLE username SET default_transaction_isolation TO 'read committed';