irbekrm

#!/bin/bash

val=$(cat /dev/urandom | tr -dc '[:alpha:]' | fold -w ${1:-63} | head -n 1)

for i in {0..100}; do
  kubectl create service clusterip "test${i}" --tcp 80:80
  for j in {0..200}; do
    kubectl label "service/test${i}" "key${j}"="${val}"
  done
done

irbekrm

#!/usr/bin/env bash

set -eu

# This script measures time taken to set up 10 self signed CA issuers and issue 50 certs for each

# Uncomment to patch cert-manager to add certificate owner refs to secrets for easier resource cleanup
# kubectl patch deployment cert-manager \
#   -ncert-manager \
#   --type='json' \

irbekrm

func main() {
	// Initialize
	var wg sync.WaitGroup
	for i := 0; i < 5; i++ {
		// Add 1 to the counter
		wg.Add(1)
		go hello(i, &wg)
	}
	// Wait blocks till the value of counter becomes 0

irbekrm

func main() {
	// Initialize
	var wg sync.WaitGroup
	for i := 0; i < 5; i++ {
		// Add 1 to the counter
		wg.Add(1)
		go hello(i, &wg)
	}
	// Wait blocks till the value of counter becomes 0
	wg.Wait()

irbekrm

// GKE

// Create a GKE cluster with 1 preemptible node and that is enrolled in rapid release channel
gcloud beta container clusters create NAME \
 --num-nodes=1 \
 --preemptible \
 --release-channel=rapid
 
 // List GKE clusters
 gcloud beta container clusters list

irbekrm

func main() {  
  s := []int{0}
  ModifySliceFunc(s)
  fmt.Printf("s: %v, pointer to s: %p", s, &s) // s: [999], pointer to s: 0x40a0f0
}

func ModifySliceFunc(s []int) {
  s[0] = 999
  fmt.Printf("s: %v, pointer to s: %p\n", s, &s) // s: [999], pointer to s: 0x40a0e0
}

irbekrm

func main() {  
  m := MyStruct{"foo"}
  ModifyStructFunc(m, "bar")
  fmt.Printf("m: %+v, pointer to m: %p", m, &m) // m: {X:foo}, pointer to m: 0x40c138
}

func ModifyStructFunc(m MyStruct, s string) {
  m.X = s
  fmt.Printf("m: %+v, pointer to m: %p", m, &m) // m: {X:bar}, pointer to m: 0x40c140m
}

irbekrm

type MyStruct struct { X string }

func ModifyStructFunc(m MyStruct, s string) {
  m.X = s
  fmt.Printf("m: %+v, pointer to m: %p", m, &m) // m: {X:changed}, pointer to m: 0x40c140m
}

func main() {  
  m := MyStruct{"x"}
  ModifyStructFunc(m, "changed")

irbekrm

export BOSH_NON_INTERACTIVE=true

// Create Bosh environment
bosh create-env ~/workspace/bosh-deployment/bosh.yml \
  --state ./state.json \
  -o ~/workspace/bosh-deployment/virtualbox/cpi.yml \
  -o ~/workspace/bosh-deployment/virtualbox/outbound-network.yml \
  -o ~/workspace/bosh-deployment/bosh-lite.yml \
  -o ~/workspace/bosh-deployment/bosh-lite-runc.yml \
  -o ~/workspace/bosh-deployment/uaa.yml \

irbekrm

Sun Aug 18 15:23:48 UTC 2019