Golang as a common language.

1. WELCOME TO GO
GOLANG AS COMMON LANGUAGE

2. PHILIP, YOU HAVE TO CHECKOUT
GOLANG, IT IS VERY POWERFUL
FOR DOING DEVOPS!
@rnrbarbosa Roberto Barbosa, December 2018

3. - Unixer (IBM AIX)
- Linuxer (RHEL, Debian,
SLES)
- SysAdmin, Middleware
Engineer @swisspost
- MAS in Software
Development
- Containers (Dotcloud,
Tutum, Kubernetes)
- Cloudbee (AWS,
Digitalocean)
- Python and Django in
Sparetime
- Most productive on Mac
OSX
- Learning Golang
WHO AM I
PHILIP SAHLI

4. WHY THEY
CREATED GO
Rob Pike Bell Labs, Unix, UTF-8
Ken Thompson Bell Labs, B, UTF-8
Robert Griesemer C++
Go was born out of frustration with existing languages and
environments for the work we were doing at Google.
Programming had become too difficult and the choice of
languages was partly to blame. One had to choose either efficient
compilation, efficient execution, or ease of programming; all
three were not available in the same mainstream language.
Source: https://golang.org/doc/faq#creating_a_new_language

5. GO IS YOUNG
2007 - 2009
2012 Version 1.0
Work on first release
go1.11 (released 2018/08/24)
go1.10 (released 2018/02/16)
go1.9 (released 2017/08/24)
go1.8 (released 2017/02/16)
go1.7 (released 2016/08/15)
go1.6 (released 2016/02/17)
go1.5 (released 2015/08/19)
go1.4 (released 2014/12/10)
go1.3 (released 2014/06/18)
go1.2 (released 2013/12/01)
go1.1 (released 2013/05/13)
go1 (released 2012/03/28)

6. WHAT IS GO
- Statically typed
- Compiled to native machine code

7. WHO USES GO

8. GO IS SIMPLE
KEYWORDS
0
22.5
45
67.5
90
C++ C# PHP JAVA RUBY PYTHON GO
WriteReadLearn Run Maintain

9. IS GO OBJECT-
ORIENTED?
- No classes, no inheritance
- Composition over inheritance

10. WHY TO USE GO
Open Source
One binary
Dependencies
Fast compilation
Readability
Standard Libraries
Concurrency
Command-line Tools
IDE
SIMPLE, RELIABLE AND EFFICIENT

11. METHODS
Go does not have classes. However, you can define methods on types.
A method is a function with a special receiver argument.
type Vertex struct {
X, Y float64
}
func (v Vertex) Abs() float64 {
return math.Sqrt(v.X*v.X + v.Y*v.Y)
}

12. POINTERSpackage main
import "fmt"
func main() {
i, j := 42, 2701
p := &i // point to i
fmt.Println(*p) // read i through the pointer
*p = 21 // set i through the pointer
fmt.Println(i) // see the new value of i
p = &j // point to j
*p = *p / 37 // divide j through the pointer
fmt.Println(j) // see the new value of j
}
Go has pointers. A pointer holds the memory address of a value.

13. DEPENDENCIES
go get github.com/philipsahli/gontador/src"
dep init
dep ensure —-update
import "github.com/philipsahli/gontador/src"1
2
3 go build
EASY TO USE
FORKS

14. DEMO
As a DevOp Engineer I need a command-line tool
so that team members can list in any CLI the linux
servers from Confnix.

15. EVERY DEVOPS MEMBER CAN CREATE
AND MAINTAIN APPLICATIONS IN A
COMMON LANGUAGE.
Me, January 2019

16. HOW TO
LEARN GO
- IDE
https://
marketplace.visualstudio.c
om/items?itemName=ms-
vscode.Go
- Golang Tour & Camps
https://tour.golang.org
http://
www.golangbootcamp.co
m/book
- Udemy Course
https://www.udemy.com/
go-the-complete-
developers-guide/
- Golang Doc
https://golang.org/pkg/
https://godoc.org/
- Gontador
https://github.com/
philipsahli/gontador/

17. READY TO GO?