What is Terraform?
->Terraform is OpenSource Software Tool
->Terraform is platform Agnostic(not specific to single cloud) Tool
Different cloud platforms:
1. AWS
2. Azure
3. GCP
4. Alibaba
5. Oracle
6. IBM cloud
10 of hunderes of clouds
->Terraform id IaC(Infrastructure as a Code)
->Terraform is developed by HCL(HassiCorp Configuration Language)
->Terraform is created by "go" language
->Terraform provide DSL(Domain Specific Language) for provisioners
->it look like JSON or yaml
Ansible:
->is also opensource
->it is platform independent
->is configuration management tool
is used to install,update,delete the softwares or application or web
servers
ie:after provisioning the infrastructure it is usefull
if you want to provision(crete) infrasture Terraform is useful.
mainly in Terraform we can use only 5 keywords
init Prepare your working directory for other commands
validate Check whether the configuration is valid
plan Show changes required by the current configuration
apply Create or update infrastructure
destroy Destroy previously-created infrastructure
1. init ->it is used to initialize plugin(download and useful within the folder)
2. validate->it can validate the user code(.tf file)(check the syntax of DSL)
3. plan: it can gather expected things(virtual) --syntax-check
4. apply it will provision expected thins can be converted to actural(physical)
5. destroy: it can remove what ever provisioned(seconds 30, 60,90 etc)
init -> validate -> plan -> apply -> destroy
DSL:
providers: is the communication with any cloud provider
eg:
providerblock "providername"{
provider "aws"{
argument1 = "value1"
....................
argumentn = "valuen"
provider "azure"{
provider "ibm"{
access key:AKIAYLYO7HCX6HI2E3H5
secret key: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
resource
->Terraform is a opensuorce, platform Agnostic Tool
->Terraform is a IaC tool
->Terraform is a Infrastructure provisioning tool
->Infrastructure can be created in almost all the virtual enviroments.
->Terraform is an infrastructure as a code tool that allows you to build,change,and
version infrastructure safely and efficiently
-> Terraform provides infrastructure automation
-> Terraform templates are written in custom DSL
->The DSL mostly look like JSON
->Terraform templates ends with .tf extension
->Terraform developed by HCL,written in go language
Installation:
->windows:
choco install terraform
->linux
Components of Terraform:
-> Providers: providers are used to create infrastructure in particular virutal
enviroment
interaction componet
eg: aws,azure,gcp,ibm
-> Resources:is the part of the infrastructure create on the provider.
Every provider provide resources.
are infrastrucr objects like
eg:vpc,ec2,elasticip etc
-> variables: to give options to the user to enter different values to resources.
deployment is more dynamic
-> statefile:it maintain the current state of the infrastructure.
-> provisioners:provide the ability to run additional steps(like ansible)
-> backends
-> modules
-> datasources
-> serviceprinicples
eg1:
install terraform
install vscode
provider syntax:
provider 'provider type'
{
argument1 'value1'
}
inputs in terraform as called as arguments
outputs are called as attributes.
provider "aws" {
region = us-east-1
access_key = AKIAYLYO7HCX2MIJU4PR
secret_key = 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
akey:AKIAYLYO7HCXTJICXWZJ
skey:AQ5oz9/mba0Qxw+4t6lA4qAs2LObr2tnVH4w+6y7
resource "aws_vpc" "my-vpc" {
cidr_block = "10.0.0.0/16"
instance_tenancy = "default"
tags = {
name = "my-vpc"
}
}
