code modified

Terraform/0-ec2-with-sg-eip.yaml

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+---
+Resources:
+  MyInstance:
+    # http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-instance.html
+    Type: AWS::EC2::Instance
+    Properties:
+      AvailabilityZone: us-east-1a
+      ImageId: ami-a4c7edb2
+      InstanceType: t2.micro
+      SecurityGroups:
+        - !Ref SSHSecurityGroup
+        - !Ref ServerSecurityGroup
+
+  MyEIP:
+    # http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-eip.html
+    Type: AWS::EC2::EIP
+    Properties:
+      InstanceId: !Ref MyInstance
+
+  SSHSecurityGroup:
+    # http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-security-group.html
+    Type: AWS::EC2::SecurityGroup
+    Properties:
+      GroupDescription: Enable SSH access via port 22
+      SecurityGroupIngress:
+      - CidrIp: 0.0.0.0/0
+        FromPort: 22
+        IpProtocol: tcp
+        ToPort: 22
+
+  ServerSecurityGroup:
+    # http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-security-group.html
+    Type: AWS::EC2::SecurityGroup
+    Properties:
+      GroupDescription: allow connections from specified CIDR ranges
+      SecurityGroupIngress:
+      - IpProtocol: tcp
+        FromPort: 80
+        ToPort: 80
+        CidrIp: 0.0.0.0/0
+      - IpProtocol: tcp
+        FromPort: 22
+        ToPort: 22
+        CidrIp: 192.168.1.1/32

Terraform/Intrinsic-Function.yml

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+AWSTemplateFormatVersion: 2010-09-09
+Description: Using intrinsic Functions and parameters
+Parameters:
+  s3NamePrefix:
+    Description: Enter the unique prefix to the name of the S3 bucket you need to create
+    Type: String
+    Default: mybucket
+Resources:
+  s3Bucket:
+    Type: 'AWS::S3::Bucket'
+    Properties:
+      BucketName: !Join 
+        - '-'
+        - - !Ref s3NamePrefix
+          - !Ref 'AWS::StackName'
+          - !Ref 'AWS::Region'

Terraform/helper-script.yml

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+AWSTemplateFormatVersion: 2010-09-09
+Resources:
+  myInstance:
+    Type: 'AWS::EC2::Instance'
+    Metadata:
+      'AWS::CloudFormation::Init':
+        config:
+          packages:
+            yum:
+              httpd: []
+          files:
+            /var/www/html/index.html:
+              content: !Join 
+                - ''
+                - - This is created by cfn-init
+              mode: '000644'
+              owner: root
+              group: root
+          commands:
+            StartApache:
+              command: service httpd start
+    Properties:
+      KeyName: predefined-kp-nagios
+      ImageId: ami-0b0dcb5067f052a63
+      SecurityGroupIds:
+        - sg-0cb18b26f2c93a0e7
+      InstanceType: t2.micro
+      UserData: !Base64 
+        'Fn::Join':
+          - ''
+          - - |
+              #!/bin/bash -ex
+            - |
+              yum install -y aws-cfn-bootstrap
+            - |
+              # Install the files and packages from the metadata
+            - '/opt/aws/bin/cfn-init -v '
+            - ' --stack '
+            - !Ref 'AWS::StackName'
+            - ' --resource myInstance '
+            - ' --region '
+            - !Ref 'AWS::Region'
+            - |+
+
+            - |
+              # Signal the status from cfn-init
+            - '/opt/aws/bin/cfn-signal -e $? '
+            - ' --stack '
+            - !Ref 'AWS::StackName'
+            - ' --resource myInstance'
+            - ' --region '
+            - !Ref 'AWS::Region'
+            - |+
+
+      CreationPolicy:
+        ResourceSignal:
+          Timeout: PT5M

Terraform/sample-cfmt-code.txt

@@ -0,0 +1,173 @@
+AWSTemplateFormatVersion: 2010-09-09
+Metadata:
+  'AWS::CloudFormation::Designer':
+    ee59f526-783c-4e22-a540-9387a8a711dc:
+      size:
+        width: 60
+        height: 60
+      position:
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+        'y': 50
+      z: 0
+      embeds: []
+    df569c93-fd6f-4629-9755-bb4d53f32c16:
+      size:
+        width: 60
+        height: 60
+      position:
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+        'y': 49
+      z: 0
+      embeds: []
+      isassociatedwith:
+        - ee59f526-783c-4e22-a540-9387a8a711dc
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+      z: 0
+      embeds:
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+        - 32659fa8-5a86-4b09-a2f9-d1491f5e033a
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+      parent: a429408b-bfc8-4dab-bfa6-c0577d202cda
+      embeds:
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+        - a76443f8-4f7d-4c6b-8726-cba284bef6fa
+      iscontainedinside:
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+        - a429408b-bfc8-4dab-bfa6-c0577d202cda
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+Resources:
+  samplebucket15112021:
+    Type: 'AWS::S3::Bucket'
+    Properties: {}
+    Metadata:
+      'AWS::CloudFormation::Designer':
+        id: ee59f526-783c-4e22-a540-9387a8a711dc
+  S3BP56RT6:
+    Type: 'AWS::S3::BucketPolicy'
+    Properties:
+      Bucket: !Ref samplebucket15112021
+    Metadata:
+      'AWS::CloudFormation::Designer':
+        id: df569c93-fd6f-4629-9755-bb4d53f32c16
+  EC2VPC5CBX:
+    Type: 'AWS::EC2::VPC'
+    Properties: {}
+    Metadata:
+      'AWS::CloudFormation::Designer':
+        id: a429408b-bfc8-4dab-bfa6-c0577d202cda
+  EC2S541S9:
+    Type: 'AWS::EC2::Subnet'
+    Properties:
+      VpcId: !Ref EC2VPC5CBX
+    Metadata:
+      'AWS::CloudFormation::Designer':
+        id: b90e9fcb-6787-4032-8b8a-5dab1d67813f
+  EC2RT3Z4BU:
+    Type: 'AWS::EC2::RouteTable'
+    Properties: {}
+    Metadata:
+      'AWS::CloudFormation::Designer':
+        id: 32659fa8-5a86-4b09-a2f9-d1491f5e033a
+    DependsOn:
+      - EC2IG4HIT1
+  EC2IG4HIT1:
+    Type: 'AWS::EC2::InternetGateway'
+    Properties: {}
+    Metadata:
+      'AWS::CloudFormation::Designer':
+        id: aee90b98-7e71-4856-89f5-a11b8ec65a0e
+  EC2I3N0M9:
+    Type: 'AWS::EC2::Instance'
+    Properties:
+      NetworkInterfaces:
+        - SubnetId: !Ref EC2S541S9
+    Metadata:
+      'AWS::CloudFormation::Designer':
+        id: 61ca9ad8-8357-4dd3-852b-dc5b7184089d
+  EC2SG4D1MZ:
+    Type: 'AWS::EC2::SecurityGroup'
+    Properties: {}
+    Metadata:
+      'AWS::CloudFormation::Designer':
+        id: a76443f8-4f7d-4c6b-8726-cba284bef6fa
+    DependsOn:
+      - EC2I3N0M9
+  EC2SRTAD0SG:
+    Type: 'AWS::EC2::SubnetRouteTableAssociation'
+    Properties:
+      RouteTableId: !Ref EC2RT3Z4BU
+      SubnetId: !Ref EC2S541S9
+    Metadata:
+      'AWS::CloudFormation::Designer':
+        id: 9aa95c4f-6437-461d-91df-0ab95022482e

common-cmds

@@ -0,0 +1,10 @@
+terraform show -- > better visualization of state file
+terraform show | grep public_ip
+terraform output -- > see final output
+terraform taint will mark the resource for refresh
+terraform refresh to just refresh the state
+terraform import aws_instance.name <id>
+terraform get
+terraform remote
+
+terraform apply -var ENV=dev

presentation+installation/edward/Code.tf

@@ -0,0 +1,59 @@
+Data Types in Terraform:
+1. string
+2. number
+3. bool
+4. List(type) == [1,2,3,4] -> List with unique values is called tuple
+5. Set(type) == order is not maintained and has unique values only 
+6. Map(type) == {"Key": "value"} 
+7. Object({<ATTR Name>=<Type>,..})
+
+
+
+main.tf
+=======
+variable "myvar"{
+    type= "string"
+    default = "my first variable"
+}
+
+variable "mymap"{
+    type= "map(string)"
+    default = {
+        my-key: "my first key"
+    }
+}
+
+variable "mylist"{
+    type= list
+    default = [1,2,3]
+}
+terraform console
+var.myvar
+"${var.myvar}"
+var.mymap["my-key"]
+var.mylist[0]
+element(var.mylist, 0)
+slice(var.mylist, 0, 2)
+
+resources.tf
+============
+provider "aws" {
+  access_key = "ACCESS_KEY_HERE"
+  secret_key = "SECRET_KEY_HERE"
+}
+
+variable "AMIS"{
+    type= "map(string)"
+    default = {
+        us-east-1 = "my ami"
+    }
+}
+
+resource "aws_instance" "example" {
+  ami           = var.AMIS[var.AWS_REGION]
+  instance_type = "t2.micro"
+}
+
+terraform.tfvars
+================
+AWS_REGION="us-east-1"