kamal-github

package main

import (
	"fmt"
	"log"
	"time"
)

func main() {
	queue := NewQueue("amqp://guest:guest@localhost:5672/", "hello")

kamal-github

# wget -i this_file

http://www.oreilly.com/programming/free/files/files/microservices-for-java-developers.pdf
http://www.oreilly.com/programming/free/files/modern-java-ee-design-patterns.pdf
http://www.oreilly.com/programming/free/files/object-oriented-vs-functional-programming.pdf
http://www.oreilly.com/programming/free/files/java-the-legend.pdf
http://www.oreilly.com/programming/free/files/functional-programming-python.pdf
http://www.oreilly.com/programming/free/files/reactive-microservices-architecture-orm.pdf
http://www.oreilly.com/programming/free/files/migrating-cloud-native-application-architectures.pdf
http://www.oreilly.com/programming/free/files/software-architecture-patterns.pdf

kamal-github

type Logger struct {
	Prop1 string
	Prop2 string
}

type Option func(l *Logger) error

func Prop1Option() Option {
	return func(l *Logger) error {
		l.Prop1 = "hello"

kamal-github

Notes for K8s Services

• create a simple service
• expose stable address
• expose through Env var and DNS
• services should be created b4 client pods for th8 service
• service name is hostname for service apart from IP, which is maintained in DNS server pod in kube-system namespace
• Expose/Impose the external machines to Cluster and make them available to pods in the cluster -> 1) create service without selector and create Endpoints resource with external IPs. now Pods can access out of cluster nodes throough that service.

kamal-github

MySQL

Getting started:

• http://www.sqlteaching.com/
• https://www.codecademy.com/courses/learn-sql

Related tutorials:

• MySQL-CLI
• Analyzing Business Metrics

kamal-github

Main/Summary points of Go for Industrial Programming, Video

• Do not decide your project Structure at the very end, it evolves!
• Make configuration based sysytem, and flags are the best way to change the behaviour of your syetem function.
• Manage goroutines lifecycle, thy are prone to leak, Always think of how this gorouting will finish/interrupt. Always try to pass some sort of interrupt func/context to interrupt e.g. func foo(execFunc func(...args interface{}) error, interupptFunc func() error) or listening to context.Done
• Use interface at the consumer side not at the implementation package, interfaces are really good to mock the dependencies.
• Must watch, Advanced Testing with go
• Do not misuse context, make context Value only request scoped like request ID for DT or au

kamal-github

Bind Mount vs Volumes

• When you use a bind mount, a file or directory on the host machine is mounted into a container. The file or directory is referenced by its full or relative path on the host machine. By contrast, when you use a volume, a new directory is created within Docker’s storage directory on the host machine, and Docker manages that directory’s contents.
• The file or directory does not need to exist on the Docker host already. It is created on demand if it does not yet exist.
• Both allow sharing contents amoung containers
• Prepopulated contents obsucured in case of Bind Mount while Volume sync the contents from containers to Docker host.
• Bind Propagation exixt only in Bind Mount.
• Unlike a bind mount, you can create and manage volumes outside the scope of any container.
  • Create a volume: $ docker volume create my-vol

kamal-github

git rebase --interactive HEAD~2

#  we are going to squash c into b 
pick b76d157 b
pick a931ac7 c

# squash c into b
pick b76d157 b
s a931ac7 c

kamal-github

Install Zsh using OhMyZsh https://github.com/robbyrussell/oh-my-zsh

For setting default user - ohmyzsh/ohmyzsh#2033 to remove the user and computer name on command prompt. set DEFAULT_USER=whoami with backquotes around whoami

Choose theme - agnoster

Install Plugins

git, golan, kubectl, sudo, docker, docker-compose, iterm2

kamal-github

// Pattern to start all go routines only after all are created.

func goRoutine() {
  <-start
  // do whatever
}

func main() {

  start := make(chan, struct{})