220417 Today I Learned

2 minute read

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주요 키워드

오늘의 할일

220417 TIL 작성
Qwiklab; Introduction to AWS Lambda
Qwiklab; Introduction to AWS CloudFormation
Ansible 주요 개념정리?
Terraform 찍먹
자료공유 스터디 자료작성
AWS 자격증 스터디 팀원 자료 Reading

추가로 정리해야할 부분

SMB 프로토콜? FSx Storage system

공부 정리

Terraform

[Terraform explained in 15 mins

Terraform Tutorial for Beginners](https://youtu.be/l5k1ai_GBDE)

0:00 - Intro
- What is Terraform?
- What is Terraform used for?
- Difference b2w TRF&ASB
  - When to use each
- TRF Architecture&Commands
- Ex. Conf. File
- How TRF works&How TRF does its job
0:30 - What is Terraform? What is infrastructure provisioning?
- automate and manage your infra.(platform&services)
  - open source
  - declarative lang.
Declarative Imperative

Define WHAT end result Define How jobs works
- Tool for infrastructure provisioning
  - What does that mean?
  - EX. Create infra for application;
    1. Provisioning Infra in correct order (DevOps)
      - Based on AWS Platform (VPC)
      - Spin up several servers (EC2 instance)
      - Security Measures (Firewall,N/W, etc.)
      - Grant proper permissions per users
    2. Deploying Apps (S/W Developer)
      - Deploy 5 microservices
      - w/Docker container + DB container
03:22 - Terraform vs Ansible
- By Official Docs. looks like same tool
- Similairty
  - IaC Tool
  - Both automates; Prov. Conf. Mng. Infra
- Differences
  - TRF; Mainly Infra Prov. + CAN deploy apps/NEW/advanced in orchetra
  - ASB; Mainly Conf. tool(Conf,Dply,inst/updates S/W)/Mature
- Combination 2 > Common Practice
06:07 - What is Terraform used for? Terraform Use Cases
- create&change infra
  - Automate the continuos changes to infra
- Replicaing infra
  - DEV environment
  - PROD envir. > same as DEV envir.
  - STAGING envir. > same as above by using TRF File
08:18 - How does Terraform work? Terraform Architecture
- Architecture; 2 main components
  - Core & Providers
- Core; Create execution plan
  - TF-config: what to create/configure
  - State: current state of setup
  - CORE: Compare current state <> desired state(config-file) Figure out what to be done = Plan
- Provider; Excute the Plan w/Providers
  - AWS/Azure (IaaS)
  - Kubernetes (PaaS)
  - Fastly (SaaS)
  - over 100 providers, to over 1000 resources/services
- To Complete Application Setup

Declarative	Imperative
Define WHAT end result	Define How jobs works

12:01 - Terraform Example Configuration File

 ```
 json format
 #Configure the AWS Provider
 provider "aws" {
     version = "~>2.0"
     region = us-east-1
 }

 #Create a VPC
 resource "aws_vpc" "example" {
     cidr_block = "10.0.0.0/16"
 }
 ```  - Define resource and its attributes.

12:47 - Declarative vs Imperative
- Declarative?
  - Define end state in conf. file
  - 5 servers w/following N/W config
  - AWS user w/following permissions
- In looks similar in initial set-up
- Updates the infra
  - Remove/Add a server
  - Imp; give instructions, rm server, add fw, add perm.
  - Dec; figure out end state, don’t need to calculate
    - adjust old config&re-execute
    - clean&small conf file
    - always know the current setup
15:23 - Terraform Basic Commands
- Diff. stages
  - refresh; query infra provider to get current state
  - plan; create an execution plan, just preview, no changes
    - determine what actions necessary to archieve desired state
  - apply; execute the plan
  - destroy; destroy the resources/infras

Ansible

https://www.redhat.com/en/services/training/do007-ansible-essentials-simplicity-automation-technical-overview

https://www.redhat.com/ko/topics/automation/learning-ansible-tutorial

https://github.com/turkenh/ansible-interactive-tutorial

Nasir