mustafayildirim

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) /

mustafayildirim

#!/bin/bash

LOCAL_EXIT_CODE=0

# Get a list of projects from Gcloud
PROJECTS=($(gcloud projects list --format="value(projectId)"))

# Create a directory to split clusters kubeconfig files later
mkdir -p "${HOME}/.kube/clusters"

mustafayildirim

FWIW: I didn't produce the content presented here (the outline from Edmond Lau's book). I've just copy-pasted it from somewhere over the Internet, but I cannot remember what exactly the original source is. I was also not able to find the author's name, so I cannot give him/her the proper credits.

---

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

mustafayildirim

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

mustafayildirim

func readLines(path string) ([]string, error) {
  file, err := os.Open(path)
  if err != nil {
    return nil, err
  }
  defer file.Close()

  var lines []string
  scanner := bufio.NewScanner(file)
  for scanner.Scan() {

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Book ID	Title	Author	Links
1-A-1	Red Blood and Black Ink: Journalism in the Old West	David Dary	Amazon |
1-A-2	Media and the American Mind: From Morse to McLuhan	Daniel J. Czitrom	Amazon | Goodreads
1-A-3	A Social History of the Media: From Gutenberg to the Internet	Peter Burke	Amazon | Goodreads
1-A-4	Media Technology and Society: A History From the Telegraph to the Internet	Brian Winston	Amazon | Goodreads
1-A-5	The Television Will be Revolutionized	Amanda D. Lotz	Amazon | Goodreads
1-A-

mustafayildirim

# This script can be used to raise a graylog2/gelf message
# gzip it and send it to a graylog server using netcat (nc)

hostname='gelftester'
short_message='test message short version'
full_message='longer test message. dont\n worry be happy'
level=1
facility='gelftester'
# gnu date
date=$(date +'%s.%N')

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# Create an access token for user "admin" with name "test-1234"
# POST /users/{username}/tokens/{name}
$ curl -i -u admin:admin -H 'Accept: application/json' -X POST 'http://127.0.0.1:12900/users/admin/tokens/test-1234?pretty=true'
HTTP/1.1 200 OK
X-Graylog-Node-ID: cd03ee44-b2a7-4824-be16-bb7456149dbd
Content-Type: application/json
Date: Mon, 08 Aug 2016 12:12:09 GMT
Content-Length: 139

{

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DELETE /test

PUT /test
{
    "mappings": {
        "person": {
            "properties": {
                "name": { "type": "string" },
                "attributes": {
                    "type": "nested",

mustafayildirim

## Configure eth0
#
# vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE="eth0"
NM_CONTROLLED="yes"
ONBOOT=yes
HWADDR=A4:BA:DB:37:F1:04
TYPE=Ethernet
BOOTPROTO=static