Basic of Terraform

1. Introduction to Terraform: IaC
Jay Kim
Nov 28, 2019
class 101
101.1 What is Terraform?
101.2 Key Features of Terraform
101.3 Pros and Cons
101.4 Providers
101.5 Basic of Infrastructure
101.6 Getting Started

2. Samsung Electronics, Staff Engineer
Global Service Reliability Engineer
Jay Kim
class 101

3. class 101
101.1 What is Terraform?

4. class 101 101.1 What is Terraform?
Use Infrastructure as Code(IaC) to provision and manage any cloud, infrastructure, or service

5. class 101 101.1 What is Terraform?
Terraform
Infrastructure
creation
DEV
STG
Prod
Use Infrastructure as Code(IaC) to provision and manage any cloud, infrastructure, or service

6. class 101 101.1 What is Terraform?
Use Infrastructure as Code(IaC) to provision and manage any cloud, infrastructure, or service

7. class 101 101.1 What is Terraform?
HCL
(Hashicorp Configuration Language (HCL))
Use Infrastructure as Code(IaC) to provision and manage any cloud, infrastructure, or service

8. class 101 101.1 What is Terraform?

9. class 101 101.1 What is Terraform?

10. class 101 101.1 What is Terraform?

11. class 101 101.1 What is Terraform?

12. class 101 101.1 What is Terraform?

13. class 101 101.1 What is Terraform?

14. class 101 101.1 What is Terraform?
Armon Dadgar(24)
co-founder and CTO
Mitchell Hashimoto(26)
co-founder and CEO

15. class 101 101.1 What is Terraform?
Armon Dadgar(24)
co-founder and CTO
Mitchell Hashimoto(26)
co-founder and CEO

16. class 101 101.1 What is Terraform?
Armon Dadgar(24)
co-founder and CTO
http://mitchellh.com/automation-obsessed
Mitchell Hashimoto(26)
co-founder and CEO

17. class 101 101.1 What is Terraform?
Mitchell Hashimoto(26)
co-founder and CEO
http://mitchellh.com/automation-obsessed

18. class 101 101.1 What is Terraform?
Terraform is, the result of
“Engineering Thinking”
Do Coding For Everything
(Automation)
Summary

19. class 101
101.2 Key Features of Terraform

20. class 101 101.2 Key Features of Terraform

21. class 101 101.2 Key Features of Terraform

22. class 101 101.2 Key Features of Terraform

23. class 101 101.2 Key Features of Terraform

24. class 101 101.2 Key Features of Terraform

25. class 101 101.2 Key Features of Terraform
These features are very similar with

26. class 101 101.2 Key Features of Terraform
These features are very similar with React

27. class 101 101.2 Key Features of Terraform
Terraform is an infrastructure provisioning tool
but the concepts aren’t only for SysOps Engineer.

28. class 101 101.2 Key Features of Terraform
*.examples of declarative

29. class 101
101.2 Key Features of Terraform

30. class 101 101.2 Key Features of Terraform

31. class 101 101.2 Key Features of Terraform

32. class 101 101.2 Key Features of Terraform

33. class 101 101.2 Key Features of Terraform

34. class 101 101.2 Key Features of Terraform

35. class 101 101.2 Key Features of Terraform
These features are very similar with

36. class 101 101.2 Key Features of Terraform
These features are very similar with React

37. class 101 101.2 Key Features of Terraform
Terraform is an infrastructure provisioning tool
but the concepts aren’t only for SysOps Engineer.
Summary

38. class 101 101.2 Key Features of Terraform
*.examples of declarative

39. class 101
101.3 Pros and Cons

40. class 101 101.3 Pros and Cons
Pros Cons
Problem Solving
w/Engineer’s way
Reusable
Resources
Productivity
High Entry Barrier
(Especially, non-coder)
Reduce
Human Error
Everyone
Should do Terraform
Difficult to train
Difficult to design

41. class 101
101.4 Providers

42. class 101
major cloud
101.4 Providers

43. class 101
major cloud
Infrastructure Software
VCS
Monitoring & System Management
101.4 Providers

44. class 101
Community
101.4 Providers

45. class 101 101.4 Providers Summary
Code For Everything
Not only for the infrastructure

46. class 101
101.5 Basic Infrastructure

47. class 101 101.5 Basic of Infrastructure
Customer
Mobile App
Web Browser
WebServer
Backend
LB
LB
LB
DB
VPC

48. class 101 101.5 Basic of Infrastructure
Customer
Mobile App
Web Browser
DB
WebServer
Backend
LB
LB
LB
Public Subnet Private Subnet DB Subnet
VPC

49. class 101 101.5 Basic of Infrastructure
Customer
Mobile App
Web Browser
DB
WebServer
Backend
LB
LB
LB
Public Subnet Private Subnet DB Subnet
IGW
NAT
Internet VPC

50. class 101
101.6 Getting Started

51. class 101 101.6 Getting Started
DEMO Public Subnet Private Subnet DB Subnet
IGW
NAT
Internet VPC

52. class 101 101.6 Getting Started
Terraform Install
https://www.terraform.io/downloads.html
After download the package,
$ mv terraform terraform_v0.12.0
$ mv terraform_v0.12.0 /usr/local/bin/terraform_v0.12.0
$ ln -s /usr/local/bin/terraform_v0.12.0 /usr/local/bin/tf

53. class 101 101.6 Getting Started
HCL(Hashicorp Configuration Language)
1. Providers
2. Resources
3. Input Variables. (TBD)
4. Output Values. (TBD)
5. Local Values
6. Modules. (TBD)
7. Data Sources (TBD)
8. Functions(Interpolation). (TBD)
9. State (TBD)
10.Backend (TBD)
Commands
1. Init
2. plan (w/target)
3. apply
4. destroy

54. class 101 101.6 Getting Started
DEMO Public Subnet Private Subnet DB Subnet
IGW
NAT
Internet VPC

55. class 101 101.6 Getting Started
2. AWS Profile Setup
1. AWS Programmable Key Creation
AWS Admin Console -> User -> Security Credentials -> Access Keys -> Create access key
$ vi ~/.aws/credentials
[dev]
aws_access_key_id={{ access_key }}
aws_secret_access_key={{ secret_access_key }}
DEMO

56. class 101 101.6 Getting Started
3. TF Demo Folder Creation
4. aws.tf file creation
5. Search “terraform was provider” in Google
DEMO

57. class 101 101.6 Getting Started
6. Copy & Paste
7. Add profile = “dev"
DEMO

58. class 101 101.6 Getting Started
8. “tf init”
DEMO

59. class 101 101.6 Getting Started
9. Search “terraform aws vpc” in google
DEMO

60. class 101 101.6 Getting Started
9. Search “terraform aws vpc” in google
DEMO

61. class 101 101.6 Getting Started
9. Search “terraform aws vpc” in google
DEMO

62. class 101 101.6 Getting Started
10. create “vpc.tf” file
DEMO

63. class 101 101.6 Getting Started
11. Execute “tf plan”
DEMO

64. class 101 101.6 Getting Started
DEMO
11. Execute “tf apply”
12. Checking “VPC Creation” in AWS Console

65. class 101 101.6 Getting Started
13. Change “Name” Tag Value & “tf plan” & “tf apply”
14. Checking the “VPC Name Change” on AWS Console
15. Add “local” variable
DEMO

66. class 101 101.6 Getting Started
16. Search “terraform aws subnet”
DEMO
17.Add “aws_subnet” “private”, “public”, “db” with cidrs

67. class 101 101.6 Getting Started
DEMO
17.Add “aws_subnet” “private”, “public”, “db” with cidrs
* Interpolation Warning
${aws_vpc.main.id}
Terraform Version < 0.12.x
aws_vpc.main.id
Terraform Version > 0.12.x
18.plan / apply

68. class 101 101.6 Getting Started
DEMO
19. igw, route table, nat, nat_eip

69. class 101 101.6 Getting Started
DEMO
19. igw, route table, nat, nat_eip