johananl

Linux CPU monitoring

watch -n 0.5 "cat /proc/cpuinfo | grep MHz && echo && sensors"
watch cat /sys/devices/system/cpu/cpu{0..7}/cpufreq/cpuinfo_max_freq
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
watch -n 0.5 sudo tlp-stat -p

johananl

# Generate a Packer var file
cat <<EOF > packer-ova.json
{
    "vcenter_server":"vcenter.example.com",
    "username":"me",
    "password":"mypass",
    "datacenter": "DC",
    "datastore":"Datastore",
    "folder": "foo",
    "cluster": "10.1.2.3",

johananl

#!/bin/bash

set -x
set -eou pipefail

gw=$(ip route | grep default | awk {'print $3'})

echo Fixing DNS

chattr -i /etc/resolv.conf

johananl

# Colors (Solarized Dark)
colors:
  # Default colors
  primary:
    background: '#002b36' # base03
    foreground: '#839496' # base0

  # Cursor colors
  cursor:
    text:   '#002b36' # base03

johananl

const maxAttempts = 10
const retryIntervalSeconds = 5

var sshConnected bool

log.Printf("Connecting to VM using SSH")

for i := 0; i < maxAttempts; i++ {
    if i > 0 {
        time.Sleep(time.Second * retryIntervalSeconds)

johananl

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch test function",
            "type": "go",
            "request": "launch",
            "mode": "test",
            "program": "${workspaceFolder}/bootstrap/kubeadm/internal/controllers",
            "args": [

johananl

Manipulating Google Calendar events from Python

Prerequisites

https://developers.google.com/calendar/api/quickstart/python#prerequisites

virtualenv venv
source venv/bin/activate
pip install --upgrade google-api-python-client google-auth-httplib2 google-auth-oauthlib

johananl

export container_name=$(docker ps --format '{{.Names}}' | grep test-.\*-control-plane)
export host_port=$(docker inspect $container_name -f '{{(index (index .NetworkSettings.Ports "6443/tcp") 0).HostPort}}')
docker exec $container_name cat /etc/kubernetes/admin.conf | sed "s/server: https:\/\/${container_name}:6443/server: https:\/\/localhost:${host_port}/" > /tmp/kubeconfig
export KUBECONFIG=/tmp/kubeconfig
kubectl get pods -A

johananl

A simple Go HTTPS server

I often need a local HTTPS server which simply responds with a self-signed certificate. This server does just that in pure Go, without additional dependencies and without having to worry about generating the certificate (no more googling openssl commands...).

Usage

go run main.go

johananl

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: kuard
  labels:
    app: kuard
spec:
  replicas: 1
  selector: