├── .github ├── CODEOWNERS └── workflows │ └── main.yml ├── version.tf ├── provider.tf ├── terraform-k8s-real-hard-way.png ├── .pre-commit-config.yaml ├── outputs.tf ├── userdata.tpl ├── userdata-worker.tpl ├── userdata-bastion.tpl ├── .gitignore ├── README.md ├── variables.tf ├── main.tf └── LICENSE /.github/CODEOWNERS: -------------------------------------------------------------------------------- 1 | * @hajowieland 2 | -------------------------------------------------------------------------------- /version.tf: -------------------------------------------------------------------------------- 1 | terraform { 2 | required_version = ">= 0.12.1" 3 | } -------------------------------------------------------------------------------- /provider.tf: -------------------------------------------------------------------------------- 1 | provider "aws" { 2 | version = ">=2.14" 3 | region = var.aws_region 4 | profile = var.aws_profile 5 | } -------------------------------------------------------------------------------- /terraform-k8s-real-hard-way.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/hajowieland/terraform-k8s-the-real-hard-way-aws/HEAD/terraform-k8s-real-hard-way.png -------------------------------------------------------------------------------- /.pre-commit-config.yaml: -------------------------------------------------------------------------------- 1 | repos: 2 | - repo: git://github.com/antonbabenko/pre-commit-terraform 3 | rev: v1.19.0 4 | hooks: 5 | - id: terraform_fmt 6 | - id: terraform_validate 7 | - id: terraform_tflint 8 | - id: terraform_docs 9 | 10 | -------------------------------------------------------------------------------- /outputs.tf: -------------------------------------------------------------------------------- 1 | output "route53_bastion_public_fqdn" { 2 | description = "Route53 record for Bastion Host Load Balancer" 3 | value = aws_route53_record.bastion-public.fqdn 4 | } 5 | 6 | output "route53_master-public-lb_public_fqdn" { 7 | description = "Route53 record for Master Public Load Balancer" 8 | value = aws_route53_record.master_lb-public.fqdn 9 | } -------------------------------------------------------------------------------- /userdata.tpl: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | sudo apt-get update 3 | sudo apt-get upgrade -y 4 | sudo apt-get install python3-pip -y 5 | sudo pip3 install awscli 6 | echo "AWS_DEFAULT_REGION=$(curl -s http://169.254.169.254/latest/dynamic/instance-identity/document | grep region | awk -F\" '{print $4}')" | sudo tee -a /etc/environment 7 | echo "HOSTEDZONE_NAME=${domain}" | sudo tee -a /etc/environment 8 | echo "INTERNAL_IP=$(curl -s http://169.254.169.254/1.0/meta-data/local-ipv4)" | sudo tee -a /etc/environment -------------------------------------------------------------------------------- /userdata-worker.tpl: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | sudo apt-get update 3 | sudo apt-get upgrade -y 4 | sudo apt-get install python3-pip -y 5 | sudo pip3 install awscli 6 | RANDOM_NUMBER=$(shuf -i 10-250 -n 1) 7 | echo "POD_CIDR=${pod_cidr}.$RANDOM_NUMBER.0/24" | sudo tee -a /etc/environment 8 | echo "AWS_DEFAULT_REGION=$(curl -s http://169.254.169.254/latest/dynamic/instance-identity/document | grep region | awk -F\" '{print $4}')" | sudo tee -a /etc/environment 9 | echo "HOSTEDZONE_NAME=${domain}" | sudo tee -a /etc/environment 10 | echo "INTERNAL_IP=$(curl -s http://169.254.169.254/1.0/meta-data/local-ipv4)" | sudo tee -a /etc/environment -------------------------------------------------------------------------------- /userdata-bastion.tpl: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | sudo yum update 3 | sudo yum upgrade -y 4 | sudo yum install jq tmux -y 5 | wget https://gist.githubusercontent.com/dmytro/3984680/raw/1e25a9766b2f21d7a8e901492bbf9db672e0c871/ssh-multi.sh -O /home/ec2-user/tmux-multi.sh 6 | chmod +x /home/ec2-user/tmux-multi.sh 7 | chown ec2-user:ec2-user /home/ec2-user/tmux-multi.sh 8 | wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 9 | chmod +x cfssl_linux-amd64 10 | sudo mv cfssl_linux-amd64 /usr/local/bin/cfssl 11 | sudo chown ec2-user:ec2-user /usr/local/bin/cfssl 12 | wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 13 | chmod +x cfssljson_linux-amd64 14 | sudo mv cfssljson_linux-amd64 /usr/local/bin/cfssljson 15 | sudo chown ec2-user:ec2-user /usr/local/bin/cfssljson 16 | curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl 17 | chmod +x ./kubectl 18 | sudo mv kubectl /usr/local/bin/kubectl 19 | sudo chown ec2-user:ec2-user /usr/local/bin/kubectl 20 | sudo hostname "${component}.${domain}" 21 | echo "AWS_DEFAULT_REGION=$(curl -s http://169.254.169.254/latest/dynamic/instance-identity/document | grep region | awk -F\" '{print $4}')" | sudo tee -a /etc/environment 22 | echo "HOSTEDZONE_NAME=${domain}" | sudo tee -a /etc/environment 23 | -------------------------------------------------------------------------------- /.github/workflows/main.yml: -------------------------------------------------------------------------------- 1 | name: 'Terraform Pull Request Workflow' 2 | on: 3 | - pull_request 4 | jobs: 5 | example: 6 | name: 'Terraform Actions' 7 | runs-on: ubuntu-latest 8 | steps: 9 | - name: 'Checkout' 10 | uses: actions/checkout@master 11 | - name: 'Terraform Format' 12 | uses: hashicorp/terraform-github-actions@master 13 | with: 14 | tf_actions_version: 0.12.13 15 | tf_actions_subcommand: 'fmt' 16 | tf_actions_working_dir: '.' 17 | tf_actions_comment: true 18 | env: 19 | GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} 20 | - name: 'Terraform Init' 21 | uses: hashicorp/terraform-github-actions@master 22 | with: 23 | tf_actions_version: 0.12.13 24 | tf_actions_subcommand: 'init' 25 | tf_actions_working_dir: '.' 26 | tf_actions_comment: true 27 | env: 28 | GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} 29 | - name: 'Terraform Validate' 30 | uses: hashicorp/terraform-github-actions@master 31 | with: 32 | tf_actions_version: 0.12.13 33 | tf_actions_subcommand: 'validate' 34 | tf_actions_working_dir: '.' 35 | tf_actions_comment: true 36 | env: 37 | GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} 38 | - name: 'Terraform Plan' 39 | uses: hashicorp/terraform-github-actions@master 40 | with: 41 | tf_actions_version: 0.12.13 42 | tf_actions_subcommand: 'plan' 43 | tf_actions_working_dir: '.' 44 | tf_actions_comment: true 45 | env: 46 | GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} 47 | AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }} 48 | AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }} 49 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | 2 | # Created by https://www.gitignore.io/api/pycharm,terraform 3 | # Edit at https://www.gitignore.io/?templates=pycharm,terraform 4 | 5 | ### PyCharm ### 6 | # Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and WebStorm 7 | # Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839 8 | 9 | # User-specific stuff 10 | .idea/**/workspace.xml 11 | .idea/**/tasks.xml 12 | .idea/**/usage.statistics.xml 13 | .idea/**/dictionaries 14 | .idea/**/shelf 15 | 16 | # Generated files 17 | .idea/**/contentModel.xml 18 | 19 | # Sensitive or high-churn files 20 | .idea/**/dataSources/ 21 | .idea/**/dataSources.ids 22 | .idea/**/dataSources.local.xml 23 | .idea/**/sqlDataSources.xml 24 | .idea/**/dynamic.xml 25 | .idea/**/uiDesigner.xml 26 | .idea/**/dbnavigator.xml 27 | 28 | # Gradle 29 | .idea/**/gradle.xml 30 | .idea/**/libraries 31 | 32 | # Gradle and Maven with auto-import 33 | # When using Gradle or Maven with auto-import, you should exclude module files, 34 | # since they will be recreated, and may cause churn. Uncomment if using 35 | # auto-import. 36 | # .idea/modules.xml 37 | # .idea/*.iml 38 | # .idea/modules 39 | # *.iml 40 | # *.ipr 41 | 42 | # CMake 43 | cmake-build-*/ 44 | 45 | # Mongo Explorer plugin 46 | .idea/**/mongoSettings.xml 47 | 48 | # File-based project format 49 | *.iws 50 | 51 | # IntelliJ 52 | out/ 53 | 54 | # mpeltonen/sbt-idea plugin 55 | .idea_modules/ 56 | 57 | # JIRA plugin 58 | atlassian-ide-plugin.xml 59 | 60 | # Cursive Clojure plugin 61 | .idea/replstate.xml 62 | 63 | # Crashlytics plugin (for Android Studio and IntelliJ) 64 | com_crashlytics_export_strings.xml 65 | crashlytics.properties 66 | crashlytics-build.properties 67 | fabric.properties 68 | 69 | # Editor-based Rest Client 70 | .idea/httpRequests 71 | 72 | # Android studio 3.1+ serialized cache file 73 | .idea/caches/build_file_checksums.ser 74 | 75 | ### PyCharm Patch ### 76 | # Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721 77 | 78 | # *.iml 79 | # modules.xml 80 | # .idea/misc.xml 81 | # *.ipr 82 | 83 | # Sonarlint plugin 84 | .idea/sonarlint 85 | .idea 86 | 87 | ### Terraform ### 88 | # Local .terraform directories 89 | **/.terraform/* 90 | 91 | # .tfstate files 92 | *.tfstate 93 | *.tfstate.* 94 | 95 | # Crash log files 96 | crash.log 97 | 98 | # Ignore any .tfvars files that are generated automatically for each Terraform run. Most 99 | # .tfvars files are managed as part of configuration and so should be included in 100 | # version control. 101 | # 102 | # example.tfvars 103 | terraform.tfvars 104 | 105 | # Ignore override files as they are usually used to override resources locally and so 106 | # are not checked in 107 | override.tf 108 | override.tf.json 109 | *_override.tf 110 | *_override.tf.json 111 | 112 | # Include override files you do wish to add to version control using negated pattern 113 | # !example_override.tf 114 | 115 | # Include tfplan files to ignore the plan output of command: terraform plan -out=tfplan 116 | # example: *tfplan* 117 | 118 | # End of https://www.gitignore.io/api/pycharm,terraform 119 | venv 120 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Terraform - Kubernetes The (real) Hard Way on AWS! 2 | 3 | This little project creates the infrastructure in Terraform for my blog post [Kubernetes The (real) Hard Way on AWS](https://napo.io/posts/kubernetes-the-real-hard-way-on-aws/). 4 | 5 | > AWS CDK Python code available 🔗 [HERE](https://github.com/hajowieland/cdk-py-k8s-the-real-hard-way-aws) 6 | 7 | 8 | You can practice creating a multi node K8s Cluster yourself for training purposes or CKA exam preparation. 9 | 10 | 11 | ![Alt text](terraform-k8s-real-hard-way.png?raw=true "Infrastructure Diagram") 12 | 13 | ## Requirements 14 | 15 | * aws-cli Profile 16 | * Existing AWS Route53 Public Hosted Zone 17 | 18 | ## Features 19 | 20 | _Default values - you can adapt all of them to your needs_ 21 | 22 | * Terraform 0.12 23 | * 1x VPC, 3x Public Subnets, 3x Private Subnets, Route Tables, Routes 24 | * 3x Worker Nodes 25 | * 3x Master Nodes 26 | * 3x Etcd Nodes 27 | * 1x Bastion Host 28 | * Genertes AWS Key Pair for instances 29 | * Route53 Records for internal & external IPv4 addresses 30 | * 1x Public LoadBalancer for Master Nodes (external kubectl access) 31 | * 1x Private LoadBalancer for Master Nodes (fronting kube-apiservers) 32 | * 1x Public LoadBalancer for Bation Host (AutoScalingGroup) 33 | * Gets most recent Ubuntu AMI for all regions 34 | * Install awscli, cfssl, cfssl_json via UserData 35 | * Allows external access from workstation IPv4 address only 36 | 37 | 38 | 39 | ## Inputs 40 | 41 | | Name | Description | Type | Default | Required | 42 | |------|-------------|:----:|:-----:|:-----:| 43 | | availability\_zones | Number of different AZs to use | number | `"3"` | no | 44 | | aws\_key\_pair\_name | AWS Key Pair name to use for EC2 Instances (if already existent) | string | `"null"` | no | 45 | | aws\_profile | AWS cli profile (e.g. `default`) | string | `"default"` | no | 46 | | aws\_region | AWS region (e.g. `us-east-1` => US North Virginia) | string | `"us-east-1"` | no | 47 | | aws\_vpc\_cidr | VPC CIDR block | string | `"10.23.0.0/16"` | no | 48 | | bastion\_instance\_type | EC2 instance type for Bastion Host | string | `"t3a.small"` | no | 49 | | bastion\_max\_size | Maximum number of EC2 instances for Bastion AutoScalingGroup | number | `"1"` | no | 50 | | bastion\_min\_size | Minimum number of EC2 instances for Bastion AutoScalingGroup | number | `"1"` | no | 51 | | bastion\_size | Desired number of EC2 instances for Bastion AutoScalingGroup | number | `"1"` | no | 52 | | etcd\_instance\_type | EC2 instance type for etcd instances | string | `"t3a.small"` | no | 53 | | etcd\_max\_size | Maximum number of EC2 instances for etcd AutoScalingGroup | number | `"3"` | no | 54 | | etcd\_min\_size | Minimum number of EC2 instances for etcd AutoScalingGroup | number | `"3"` | no | 55 | | etcd\_size | Desired number of EC2 instances for etcd AutoScalingGroup | number | `"3"` | no | 56 | | hosted\_zone | Route53 Hosted Zone for creating records (without . suffix, e.g. `napo.io`) | string | n/a | yes | 57 | | master\_instance\_type | EC2 instance type for K8s master instances | string | `"t3a.small"` | no | 58 | | master\_max\_size | Maximum number of EC2 instances for K8s Master AutoScalingGroup | number | `"3"` | no | 59 | | master\_min\_size | Minimum number of EC2 instances for K8s Master AutoScalingGroup | number | `"3"` | no | 60 | | master\_size | Desired number of EC2 instances for K8s Master AutoScalingGroup | number | `"3"` | no | 61 | | owner | Owner name used for tags | string | `"napo.io"` | no | 62 | | pod\_cidr | The first two octets for the Pod network CIDR (used in Worker UserData to generate POD_CIDR envvar) | string | `"10.200"` | no | 63 | | project | Project name used for tags | string | `"k8s-the-right-hard-way-aws"` | no | 64 | | ssh\_public\_key\_path | SSH public key path (to create a new AWS Key Pair from existing local SSH public RSA key) | string | `"~/.ssh/id_rsa.pub"` | no | 65 | | stage | Environment name (e.g. `testing`, `dev`, `staging`, `prod`) | string | `"testing"` | no | 66 | | worker\_instance\_type | EC2 instance type for K8s worker instances | string | `"t3a.small"` | no | 67 | | worker\_max\_size | Maximum number of EC2 instances for K8s Worker AutoScalingGroup | number | `"3"` | no | 68 | | worker\_min\_size | Minimum number of EC2 instances for K8s Worker AutoScalingGroup | number | `"3"` | no | 69 | | worker\_size | Desired number of EC2 instances for K8s Worker AutoScalingGroup | number | `"3"` | no | 70 | 71 | ## Outputs 72 | 73 | | Name | Description | 74 | |------|-------------| 75 | | route53\_bastion\_public\_fqdn | Route53 record for Bastion Host Load Balancer | 76 | | route53\_master-public-lb\_public\_fqdn | Route53 record for Master Public Load Balancer | 77 | 78 | 79 | -------------------------------------------------------------------------------- /variables.tf: -------------------------------------------------------------------------------- 1 | variable "project" { 2 | description = "Project name used for tags" 3 | type = string 4 | default = "k8s-the-right-hard-way-aws" 5 | } 6 | 7 | variable "owner" { 8 | description = "Owner name used for tags" 9 | type = string 10 | default = "napo.io" 11 | } 12 | 13 | variable "stage" { 14 | description = "Environment name (e.g. `testing`, `dev`, `staging`, `prod`)" 15 | type = string 16 | default = "testing" 17 | } 18 | 19 | variable "aws_profile" { 20 | description = "AWS cli profile (e.g. `default`)" 21 | type = string 22 | default = "default" 23 | } 24 | 25 | variable "aws_region" { 26 | description = "AWS region (e.g. `us-east-1` => US North Virginia)" 27 | type = string 28 | default = "us-east-1" 29 | } 30 | 31 | variable "availability_zones" { 32 | description = "Number of different AZs to use" 33 | type = number 34 | default = 3 35 | } 36 | 37 | variable "aws_vpc_cidr" { 38 | description = "VPC CIDR block" 39 | type = string 40 | default = "10.23.0.0/16" 41 | } 42 | 43 | variable "aws_key_pair_name" { 44 | description = "AWS Key Pair name to use for EC2 Instances (if already existent)" 45 | type = string 46 | default = null 47 | } 48 | 49 | variable "ssh_public_key_path" { 50 | description = "SSH public key path (to create a new AWS Key Pair from existing local SSH public RSA key)" 51 | type = string 52 | default = "~/.ssh/id_rsa.pub" 53 | } 54 | 55 | variable "hosted_zone" { 56 | description = "Route53 Hosted Zone for creating records (without . suffix, e.g. `napo.io`)" 57 | type = string 58 | } 59 | 60 | variable "pod_cidr" { 61 | description = "The first two octets for the Pod network CIDR (used in Worker UserData to generate POD_CIDR envvar)" 62 | type = string 63 | default = "10.200" 64 | } 65 | variable "bastion_max_size" { 66 | description = "Maximum number of EC2 instances for Bastion AutoScalingGroup" 67 | type = number 68 | default = 1 69 | } 70 | 71 | variable "bastion_min_size" { 72 | description = "Minimum number of EC2 instances for Bastion AutoScalingGroup" 73 | type = number 74 | default = 1 75 | } 76 | 77 | variable "bastion_size" { 78 | description = "Desired number of EC2 instances for Bastion AutoScalingGroup" 79 | type = number 80 | default = 1 81 | } 82 | 83 | variable "etcd_max_size" { 84 | description = "Maximum number of EC2 instances for etcd AutoScalingGroup" 85 | type = number 86 | default = 3 87 | } 88 | 89 | variable "etcd_min_size" { 90 | description = "Minimum number of EC2 instances for etcd AutoScalingGroup" 91 | type = number 92 | default = 3 93 | } 94 | 95 | variable "etcd_size" { 96 | description = "Desired number of EC2 instances for etcd AutoScalingGroup" 97 | type = number 98 | default = 3 99 | } 100 | 101 | variable "master_max_size" { 102 | description = "Maximum number of EC2 instances for K8s Master AutoScalingGroup" 103 | type = number 104 | default = 3 105 | } 106 | 107 | variable "master_min_size" { 108 | description = "Minimum number of EC2 instances for K8s Master AutoScalingGroup" 109 | type = number 110 | default = 3 111 | } 112 | 113 | variable "master_size" { 114 | description = "Desired number of EC2 instances for K8s Master AutoScalingGroup" 115 | type = number 116 | default = 3 117 | } 118 | 119 | variable "worker_max_size" { 120 | description = "Maximum number of EC2 instances for K8s Worker AutoScalingGroup" 121 | type = number 122 | default = 3 123 | } 124 | 125 | variable "worker_min_size" { 126 | description = "Minimum number of EC2 instances for K8s Worker AutoScalingGroup" 127 | type = number 128 | default = 3 129 | } 130 | 131 | variable "worker_size" { 132 | description = "Desired number of EC2 instances for K8s Worker AutoScalingGroup" 133 | type = number 134 | default = 3 135 | } 136 | 137 | variable "bastion_instance_type" { 138 | description = "EC2 instance type for Bastion Host" 139 | type = string 140 | default = "t3a.small" 141 | } 142 | 143 | variable "etcd_instance_type" { 144 | description = "EC2 instance type for etcd instances" 145 | type = string 146 | default = "t3a.small" 147 | } 148 | 149 | variable "master_instance_type" { 150 | description = "EC2 instance type for K8s master instances" 151 | type = string 152 | default = "t3a.small" 153 | } 154 | 155 | variable "worker_instance_type" { 156 | description = "EC2 instance type for K8s worker instances" 157 | type = string 158 | default = "t3a.small" 159 | } 160 | -------------------------------------------------------------------------------- /main.tf: -------------------------------------------------------------------------------- 1 | # Data sources 2 | ## Ubuntu AMI for all K8s instances 3 | data "aws_ami" "ubuntu" { 4 | most_recent = true 5 | owners = ["099720109477"] 6 | 7 | filter { 8 | name = "name" 9 | values = ["ubuntu/images/hvm-ssd/ubuntu-bionic-18.04-amd64-server-*"] 10 | } 11 | } 12 | 13 | ## Amazon Linux AMI for Bastion Host 14 | data "aws_ami" "amazonlinux" { 15 | most_recent = true 16 | owners = ["amazon"] 17 | 18 | filter { 19 | name = "name" 20 | values = ["amzn2-ami-hvm*"] 21 | } 22 | 23 | filter { 24 | name = "architecture" 25 | values = ["x86_64"] 26 | } 27 | 28 | } 29 | 30 | ## AWS region's Availabililty Zones 31 | data "aws_availability_zones" "available" { 32 | state = "available" 33 | } 34 | 35 | ## Get local workstation's external IPv4 address 36 | data "http" "workstation-external-ip" { 37 | url = "http://ipv4.icanhazip.com" 38 | } 39 | 40 | locals { 41 | workstation-external-cidr = "${chomp(data.http.workstation-external-ip.body)}/32" 42 | } 43 | 44 | ## Route53 HostedZone ID from name 45 | data "aws_route53_zone" "selected" { 46 | name = "${var.hosted_zone}." 47 | private_zone = false 48 | } 49 | 50 | # AWS VPC 51 | resource "aws_vpc" "main" { 52 | cidr_block = var.aws_vpc_cidr 53 | enable_dns_hostnames = true 54 | assign_generated_ipv6_cidr_block = false 55 | 56 | tags = { 57 | Name = "${var.project}-vpc" 58 | Project = var.project 59 | Owner = var.owner 60 | } 61 | } 62 | 63 | # Public Subnets 64 | resource "aws_subnet" "public" { 65 | count = var.availability_zones 66 | availability_zone = data.aws_availability_zones.available.names[count.index] 67 | vpc_id = aws_vpc.main.id 68 | cidr_block = cidrsubnet(var.aws_vpc_cidr, 8, count.index + 11) 69 | tags = { 70 | Name = "${var.project}-public-${count.index}" 71 | Attribute = "public" 72 | Project = var.project 73 | Owner = var.owner 74 | } 75 | } 76 | 77 | # Private Subnets 78 | resource "aws_subnet" "private" { 79 | count = var.availability_zones 80 | availability_zone = data.aws_availability_zones.available.names[count.index] 81 | vpc_id = aws_vpc.main.id 82 | cidr_block = cidrsubnet(var.aws_vpc_cidr, 8, count.index + 1) 83 | map_public_ip_on_launch = false 84 | 85 | tags = { 86 | Name = "${var.project}-private-${count.index}" 87 | Attribute = "private" 88 | Project = var.project 89 | Owner = var.owner 90 | } 91 | } 92 | 93 | # AWS Elastic IP addresses (EIP) for NAT Gateways 94 | resource "aws_eip" "nat" { 95 | count = var.availability_zones 96 | 97 | vpc = true 98 | 99 | tags = { 100 | Name = "${var.project}-eip-natgw-${count.index}" 101 | Project = var.project 102 | Owner = var.owner 103 | } 104 | } 105 | 106 | # AWS NAT Gateways 107 | resource "aws_nat_gateway" "natgw" { 108 | count = var.availability_zones 109 | 110 | allocation_id = aws_eip.nat[count.index].id 111 | subnet_id = element(aws_subnet.public.*.id, count.index) 112 | 113 | tags = { 114 | Name = "${var.project}-natgw-${count.index}" 115 | Project = var.project 116 | Owner = var.owner 117 | } 118 | } 119 | 120 | resource "aws_internet_gateway" "igw" { 121 | vpc_id = aws_vpc.main.id 122 | 123 | tags = { 124 | Name = "${var.project}-igw" 125 | Project = var.project 126 | Owner = var.owner 127 | } 128 | } 129 | 130 | # AWS Route Tables 131 | ## Public 132 | resource "aws_route_table" "rt-public" { 133 | vpc_id = aws_vpc.main.id 134 | 135 | route { 136 | cidr_block = "0.0.0.0/0" 137 | gateway_id = aws_internet_gateway.igw.id 138 | } 139 | 140 | tags = { 141 | Name = "${var.project}-rt-public" 142 | Attribute = "public" 143 | Project = var.project 144 | Owner = var.owner 145 | } 146 | } 147 | 148 | ## Private 149 | resource "aws_route_table" "rt-private" { 150 | count = var.availability_zones 151 | vpc_id = aws_vpc.main.id 152 | 153 | route { 154 | cidr_block = "0.0.0.0/0" 155 | nat_gateway_id = aws_nat_gateway.natgw[count.index].id 156 | } 157 | 158 | tags = { 159 | Name = "${var.project}-rt-private" 160 | Attribute = "private" 161 | Project = var.project 162 | Owner = var.owner 163 | } 164 | } 165 | 166 | 167 | # AWS Route Table Associations 168 | ## Public 169 | resource "aws_route_table_association" "public-rtassoc" { 170 | count = var.availability_zones 171 | subnet_id = element(aws_subnet.public.*.id, count.index) 172 | route_table_id = aws_route_table.rt-public.id 173 | } 174 | 175 | ## Private 176 | resource "aws_route_table_association" "private-rtassoc" { 177 | count = var.availability_zones 178 | subnet_id = element(aws_subnet.private.*.id, count.index) 179 | route_table_id = aws_route_table.rt-private[count.index].id 180 | } 181 | 182 | # AWS Key Pair to generate 183 | # => If you want to use an existing AWS Key Pair one, set value for TF var.aws_key_pair_name 184 | resource "aws_key_pair" "ssh" { 185 | count = var.aws_key_pair_name == null ? 1 : 0 186 | key_name = "${var.owner}-${var.project}" 187 | public_key = file(var.ssh_public_key_path) 188 | } 189 | 190 | # IAM Roles for EC2 Instance Profiles 191 | data "aws_iam_policy_document" "ec2_assume_role" { 192 | statement { 193 | actions = ["sts:AssumeRole"] 194 | principals { 195 | identifiers = ["ec2.amazonaws.com"] 196 | type = "Service" 197 | } 198 | } 199 | } 200 | 201 | ## Bastion Host 202 | data "aws_iam_policy_document" "bastion" { 203 | statement { 204 | sid = "bastion" 205 | actions = [ 206 | "autoscaling:DescribeAutoScalingInstances", 207 | "ec2:CreateRoute", 208 | "ec2:CreateTags", 209 | "ec2:DescribeAutoScalingGroups", 210 | "ec2:DescribeInstances", 211 | "ec2:DescribeRegions", 212 | "ec2:DescribeRouteTables", 213 | "ec2:DescribeTags", 214 | "elasticloadbalancing:DescribeLoadBalancers", 215 | "route53:ListHostedZonesByName" 216 | ] 217 | resources = ["*"] 218 | } 219 | 220 | statement { 221 | sid = "route53" 222 | actions = [ 223 | "route53:ChangeResourceRecordSets" 224 | ] 225 | resources = [ 226 | "arn:aws:route53:::hostedzone/${data.aws_route53_zone.selected.zone_id}" 227 | ] 228 | } 229 | } 230 | 231 | resource "aws_iam_role" "bastion" { 232 | name_prefix = "bastion-" 233 | assume_role_policy = data.aws_iam_policy_document.ec2_assume_role.json 234 | 235 | tags = { 236 | Name = "${var.project}-bastion" 237 | Project = var.project 238 | Owner = var.owner 239 | } 240 | 241 | lifecycle { 242 | create_before_destroy = true 243 | } 244 | } 245 | 246 | resource "aws_iam_role_policy" "bastion" { 247 | name_prefix = "bastion-" 248 | role = aws_iam_role.bastion.id 249 | policy = data.aws_iam_policy_document.bastion.json 250 | } 251 | 252 | resource "aws_iam_instance_profile" "bastion" { 253 | name_prefix = "bastion-" 254 | role = aws_iam_role.bastion.name 255 | } 256 | 257 | ## etcd & Kubernetes instances 258 | data "aws_iam_policy_document" "etcd_worker_master" { 259 | statement { 260 | sid = "autoscaling" 261 | actions = [ 262 | "ec2:DescribeAvailabilityZones", 263 | "ec2:DescribeInstances", 264 | "ec2:DescribeNetworkInterfaces", 265 | "ec2:DescribeRegions", 266 | "ec2:DescribeRouteTables", 267 | "ec2:DescribeTags", 268 | "elasticloadbalancing:DescribeLoadBalancers" 269 | ] 270 | resources = ["*"] 271 | } 272 | } 273 | 274 | resource "aws_iam_role" "etcd_worker_master" { 275 | name_prefix = "etcd-worker-master-" 276 | 277 | assume_role_policy = data.aws_iam_policy_document.ec2_assume_role.json 278 | 279 | tags = { 280 | Name = "${var.project}-etcd-worker-master" 281 | Project = var.project 282 | Owner = var.owner 283 | } 284 | 285 | lifecycle { 286 | create_before_destroy = true 287 | } 288 | } 289 | 290 | resource "aws_iam_role_policy" "etcd_worker_master" { 291 | name_prefix = "etcd-worker-master-" 292 | role = aws_iam_role.etcd_worker_master.id 293 | policy = data.aws_iam_policy_document.etcd_worker_master.json 294 | } 295 | 296 | resource "aws_iam_instance_profile" "etcd_worker_master" { 297 | name_prefix = "etcd-worker-master-" 298 | role = aws_iam_role.etcd_worker_master.name 299 | } 300 | 301 | 302 | # SecurityGroups 303 | resource "aws_security_group" "bastion-lb" { 304 | name_prefix = "bastion-lb-" 305 | description = "Bastion-LB" 306 | vpc_id = aws_vpc.main.id 307 | 308 | tags = { 309 | Name = "${var.project}-bastion-lb" 310 | Project = var.project 311 | Owner = var.owner 312 | } 313 | 314 | lifecycle { 315 | create_before_destroy = true 316 | } 317 | } 318 | 319 | resource "aws_security_group" "master-public-lb" { 320 | name_prefix = "master-public-lb-" 321 | description = "Master-Public-LB" 322 | vpc_id = aws_vpc.main.id 323 | 324 | tags = { 325 | Name = "${var.project}-master-lb-public" 326 | Project = var.project 327 | Owner = var.owner 328 | } 329 | 330 | lifecycle { 331 | create_before_destroy = true 332 | } 333 | } 334 | 335 | resource "aws_security_group" "master-private-lb" { 336 | name_prefix = "master-private-lb-" 337 | description = "Master-Private-LB" 338 | vpc_id = aws_vpc.main.id 339 | 340 | tags = { 341 | Name = "${var.project}-master-lb-private" 342 | Project = var.project 343 | Owner = var.owner 344 | } 345 | 346 | lifecycle { 347 | create_before_destroy = true 348 | } 349 | } 350 | 351 | resource "aws_security_group" "bastion" { 352 | name_prefix = "bastion-" 353 | description = "Bastion" 354 | vpc_id = aws_vpc.main.id 355 | 356 | tags = { 357 | Name = "${var.project}-bastion" 358 | Project = var.project 359 | Owner = var.owner 360 | } 361 | 362 | lifecycle { 363 | create_before_destroy = true 364 | } 365 | } 366 | 367 | resource "aws_security_group" "etcd" { 368 | name_prefix = "etcd-" 369 | description = "etcd" 370 | vpc_id = aws_vpc.main.id 371 | 372 | tags = { 373 | Name = "${var.project}-etcd" 374 | Project = var.project 375 | Owner = var.owner 376 | } 377 | 378 | lifecycle { 379 | create_before_destroy = true 380 | } 381 | } 382 | 383 | resource "aws_security_group" "master" { 384 | name_prefix = "k8s-master-" 385 | description = "K8s Master" 386 | vpc_id = aws_vpc.main.id 387 | 388 | tags = { 389 | Name = "${var.project}-k8s-master" 390 | Project = var.project 391 | Owner = var.owner 392 | } 393 | 394 | lifecycle { 395 | create_before_destroy = true 396 | } 397 | } 398 | 399 | resource "aws_security_group" "worker" { 400 | name_prefix = "k8s-worker-" 401 | description = "K8s Worker" 402 | vpc_id = aws_vpc.main.id 403 | 404 | tags = { 405 | Name = "${var.project}-k8s-worker" 406 | Project = var.project 407 | Owner = var.owner 408 | } 409 | 410 | lifecycle { 411 | create_before_destroy = true 412 | } 413 | } 414 | 415 | 416 | # Security Group rules to add to above SecurityGroups 417 | ## Ingress 418 | resource "aws_security_group_rule" "ssh" { 419 | for_each = { 420 | "Etcd" = aws_security_group.etcd.id, 421 | "Masters" = aws_security_group.master.id, 422 | "Workers" = aws_security_group.worker.id, 423 | } 424 | security_group_id = each.value 425 | type = "ingress" 426 | from_port = 22 427 | to_port = 22 428 | protocol = "tcp" 429 | source_security_group_id = aws_security_group.bastion.id 430 | description = "SSH: Bastion - ${each.key}" 431 | } 432 | 433 | ### Bastion Host 434 | resource "aws_security_group_rule" "allow_ingress_on_bastion_kubectl" { 435 | for_each = { 436 | "MasterPrivateLB" = aws_security_group.master-private-lb.id, 437 | "Masters" = aws_security_group.master.id, 438 | "Workers" = aws_security_group.worker.id 439 | } 440 | security_group_id = each.value 441 | type = "ingress" 442 | from_port = 6443 443 | to_port = 6443 444 | protocol = "tcp" 445 | source_security_group_id = aws_security_group.bastion.id 446 | description = "kubectl: Bastion - ${each.key}" 447 | } 448 | 449 | resource "aws_security_group_rule" "allow_ingress_bastion-lb_on_bastion_ssh" { 450 | security_group_id = aws_security_group.bastion.id 451 | type = "ingress" 452 | from_port = 22 453 | to_port = 22 454 | protocol = "tcp" 455 | source_security_group_id = aws_security_group.bastion-lb.id 456 | description = "SSH: Bastion-LB - Bastion" 457 | } 458 | 459 | ### Bastion LB 460 | resource "aws_security_group_rule" "allow_ingress_workstation_on_bastion-lb_ssh" { 461 | security_group_id = aws_security_group.bastion-lb.id 462 | type = "ingress" 463 | from_port = 22 464 | to_port = 22 465 | protocol = "tcp" 466 | cidr_blocks = [local.workstation-external-cidr] 467 | description = "SSH: Workstation - MasterPublicLB" 468 | } 469 | 470 | ### MasterPublicLB 471 | resource "aws_security_group_rule" "allow_ingress_workstation_on-master-public-lb_kubectl" { 472 | security_group_id = aws_security_group.master-public-lb.id 473 | type = "ingress" 474 | from_port = 6443 475 | to_port = 6443 476 | protocol = "tcp" 477 | cidr_blocks = [local.workstation-external-cidr] 478 | description = "kubectl: Workstation - MasterPublicLB" 479 | } 480 | 481 | ### MasterPrivateLB 482 | resource "aws_security_group_rule" "allow_ingress_on_master-private-lb_kubeapi" { 483 | security_group_id = aws_security_group.master-private-lb.id 484 | type = "ingress" 485 | from_port = 6443 486 | to_port = 6443 487 | protocol = "tcp" 488 | cidr_blocks = ["0.0.0.0/0"] 489 | description = "kubeapi: ALL - MasterPrivateLB" 490 | } 491 | 492 | ### etcd 493 | resource "aws_security_group_rule" "allow_etcd" { 494 | for_each = { 495 | "Masters" = aws_security_group.master.id, 496 | "Etcd" = aws_security_group.etcd.id 497 | } 498 | security_group_id = aws_security_group.etcd.id 499 | type = "ingress" 500 | from_port = 2379 501 | to_port = 2380 502 | protocol = "tcp" 503 | source_security_group_id = each.value 504 | description = "etcd: ${each.key} - Etcds" 505 | } 506 | 507 | ### Master 508 | resource "aws_security_group_rule" "allow_kubectl_on_master" { 509 | for_each = { 510 | "MasterPublicLB" = aws_security_group.master-public-lb.id, 511 | "MasterPrivateLB" = aws_security_group.master-private-lb.id, 512 | "Workers" = aws_security_group.worker.id 513 | } 514 | security_group_id = aws_security_group.master.id 515 | type = "ingress" 516 | from_port = 6443 517 | to_port = 6443 518 | protocol = "tcp" 519 | source_security_group_id = each.value 520 | description = "kubectl: ${each.key} - Masters" 521 | } 522 | 523 | resource "aws_security_group_rule" "allow_ingress_worker_on_master_all" { 524 | security_group_id = aws_security_group.master.id 525 | type = "ingress" 526 | from_port = 0 527 | to_port = 65535 528 | protocol = "all" 529 | source_security_group_id = aws_security_group.worker.id 530 | description = "ALL: Workers - Masters" 531 | } 532 | 533 | ### Worker 534 | resource "aws_security_group_rule" "allow_ingress_on_worker_all" { 535 | for_each = { 536 | "Masters" = aws_security_group.master.id, 537 | "MasterPrivateLB" = aws_security_group.master-private-lb.id 538 | } 539 | security_group_id = aws_security_group.worker.id 540 | type = "ingress" 541 | from_port = 0 542 | to_port = 65535 543 | protocol = "all" 544 | source_security_group_id = each.value 545 | description = "ALL: ${each.key} - Workers" 546 | } 547 | 548 | ## Egress 549 | resource "aws_security_group_rule" "egress_all" { 550 | for_each = { 551 | "BastionLB" = aws_security_group.bastion-lb.id, 552 | "MasterPublicLB" = aws_security_group.master-public-lb.id, 553 | "MasterPrivateLB" = aws_security_group.master-private-lb.id, 554 | "Bastion" = aws_security_group.bastion.id, 555 | "Etcds" = aws_security_group.etcd.id, 556 | "Masters" = aws_security_group.master.id, 557 | "Workers" = aws_security_group.worker.id 558 | } 559 | security_group_id = each.value 560 | type = "egress" 561 | from_port = 0 562 | to_port = 0 563 | protocol = "-1" 564 | cidr_blocks = ["0.0.0.0/0"] 565 | description = "Egress ALL: ${each.key}" 566 | } 567 | 568 | # Load Balancer 569 | ## Bastion Host 570 | resource "aws_elb" "bastion" { 571 | name_prefix = "basti-" // cannot be longer than 6 characters 572 | subnets = aws_subnet.public.*.id 573 | security_groups = [aws_security_group.bastion-lb.id] 574 | 575 | listener { 576 | instance_port = 22 577 | instance_protocol = "tcp" 578 | lb_port = 22 579 | lb_protocol = "tcp" 580 | } 581 | 582 | tags = { 583 | Name = "${var.project}-bastion-lb" 584 | Project = var.project 585 | Owner = var.owner 586 | } 587 | } 588 | 589 | ## Kubernetes Master (for remote kubctl access from workstation) 590 | resource "aws_elb" "master-public" { 591 | name_prefix = "master" // cannot be longer than 6 characters 592 | subnets = aws_subnet.public.*.id 593 | security_groups = [aws_security_group.master-public-lb.id] 594 | 595 | listener { 596 | instance_port = 6443 597 | instance_protocol = "tcp" 598 | lb_port = 6443 599 | lb_protocol = "tcp" 600 | } 601 | 602 | tags = { 603 | Name = "${var.project}-master--publiclb" 604 | Attribute = "public" 605 | Project = var.project 606 | Owner = var.owner 607 | } 608 | } 609 | 610 | ## Kubernetes Master (fronting kube-apiservers) 611 | resource "aws_elb" "master-private" { 612 | name_prefix = "master" // will be prefixed with internal - cannot be longer than 6 characters 613 | internal = true 614 | subnets = aws_subnet.public.*.id 615 | security_groups = [aws_security_group.master-private-lb.id] 616 | 617 | listener { 618 | instance_port = 6443 619 | instance_protocol = "tcp" 620 | lb_port = 6443 621 | lb_protocol = "tcp" 622 | } 623 | 624 | tags = { 625 | Name = "${var.project}-master--private-lb" 626 | ttribute = "private" 627 | Project = var.project 628 | Owner = var.owner 629 | } 630 | } 631 | 632 | # LaunchConfigurations 633 | ## Bastion Host 634 | resource "aws_launch_configuration" "bastion" { 635 | name_prefix = "bastion-" 636 | image_id = data.aws_ami.amazonlinux.id 637 | instance_type = var.bastion_instance_type 638 | security_groups = [aws_security_group.bastion.id] 639 | key_name = var.aws_key_pair_name == null ? aws_key_pair.ssh.0.key_name : var.aws_key_pair_name 640 | associate_public_ip_address = false 641 | ebs_optimized = true 642 | enable_monitoring = true 643 | iam_instance_profile = aws_iam_instance_profile.bastion.id 644 | 645 | user_data = templatefile("${path.module}/userdata-bastion.tpl", { 646 | component = "bastion" 647 | domain = var.hosted_zone 648 | }) 649 | 650 | lifecycle { 651 | create_before_destroy = true 652 | } 653 | } 654 | 655 | ## etcd 656 | resource "aws_launch_configuration" "etcd" { 657 | name_prefix = "etcd-" 658 | image_id = data.aws_ami.ubuntu.id 659 | instance_type = var.etcd_instance_type 660 | security_groups = [aws_security_group.etcd.id] 661 | key_name = var.aws_key_pair_name == null ? aws_key_pair.ssh.0.key_name : var.aws_key_pair_name 662 | associate_public_ip_address = false 663 | ebs_optimized = true 664 | enable_monitoring = true 665 | iam_instance_profile = aws_iam_instance_profile.etcd_worker_master.id 666 | 667 | user_data = templatefile("${path.module}/userdata.tpl", { 668 | domain = var.hosted_zone 669 | }) 670 | 671 | lifecycle { 672 | create_before_destroy = true 673 | } 674 | } 675 | 676 | ## Kubernetes Master 677 | resource "aws_launch_configuration" "master" { 678 | name_prefix = "master-" 679 | image_id = data.aws_ami.ubuntu.id 680 | instance_type = var.master_instance_type 681 | security_groups = [aws_security_group.master.id] 682 | key_name = var.aws_key_pair_name == null ? aws_key_pair.ssh.0.key_name : var.aws_key_pair_name 683 | associate_public_ip_address = false 684 | ebs_optimized = true 685 | enable_monitoring = true 686 | iam_instance_profile = aws_iam_instance_profile.etcd_worker_master.id 687 | 688 | user_data = templatefile("${path.module}/userdata.tpl", { 689 | domain = var.hosted_zone 690 | }) 691 | 692 | lifecycle { 693 | create_before_destroy = true 694 | } 695 | } 696 | 697 | ## Kubernetes Worker 698 | resource "aws_launch_configuration" "worker" { 699 | name_prefix = "worker-" 700 | image_id = data.aws_ami.ubuntu.id 701 | instance_type = var.worker_instance_type 702 | security_groups = [aws_security_group.worker.id] 703 | key_name = var.aws_key_pair_name == null ? aws_key_pair.ssh.0.key_name : var.aws_key_pair_name 704 | associate_public_ip_address = false 705 | ebs_optimized = true 706 | enable_monitoring = true 707 | iam_instance_profile = aws_iam_instance_profile.etcd_worker_master.id 708 | 709 | user_data = templatefile("${path.module}/userdata-worker.tpl", { 710 | pod_cidr = var.pod_cidr 711 | domain = var.hosted_zone 712 | }) 713 | 714 | lifecycle { 715 | create_before_destroy = true 716 | } 717 | } 718 | 719 | 720 | # AutoScalingGroups 721 | ## Bastion 722 | resource "aws_autoscaling_group" "bastion" { 723 | max_size = var.bastion_max_size 724 | min_size = var.bastion_min_size 725 | desired_capacity = var.bastion_size 726 | force_delete = false 727 | launch_configuration = aws_launch_configuration.bastion.name 728 | vpc_zone_identifier = aws_subnet.private.*.id 729 | load_balancers = [aws_elb.bastion.id] 730 | 731 | tags = [ 732 | { 733 | key = "Name" 734 | value = "${var.project}-bastion" 735 | propagate_at_launch = true 736 | }, 737 | { 738 | key = "Project" 739 | value = var.project 740 | propagate_at_launch = true 741 | }, 742 | { 743 | key = "Owner" 744 | value = var.owner 745 | propagate_at_launch = true 746 | } 747 | ] 748 | } 749 | 750 | ## etcd 751 | resource "aws_autoscaling_group" "etcd" { 752 | max_size = var.etcd_max_size 753 | min_size = var.etcd_min_size 754 | desired_capacity = var.etcd_size 755 | force_delete = true 756 | launch_configuration = aws_launch_configuration.etcd.name 757 | vpc_zone_identifier = aws_subnet.private.*.id 758 | 759 | tags = [ 760 | { 761 | key = "Name" 762 | value = "${var.project}-etcd" 763 | propagate_at_launch = true 764 | }, 765 | { 766 | key = "Project" 767 | value = var.project 768 | propagate_at_launch = true 769 | }, 770 | { 771 | key = "Owner" 772 | value = var.owner 773 | propagate_at_launch = true 774 | } 775 | ] 776 | } 777 | 778 | ## Kubernetes Master 779 | resource "aws_autoscaling_group" "master" { 780 | max_size = var.master_max_size 781 | min_size = var.master_min_size 782 | desired_capacity = var.master_size 783 | force_delete = true 784 | launch_configuration = aws_launch_configuration.master.name 785 | vpc_zone_identifier = aws_subnet.private.*.id 786 | load_balancers = [aws_elb.master-public.id, aws_elb.master-private.id] 787 | 788 | tags = [ 789 | { 790 | key = "Name" 791 | value = "${var.project}-k8s-master" 792 | propagate_at_launch = true 793 | }, 794 | { 795 | key = "Project" 796 | value = var.project 797 | propagate_at_launch = true 798 | }, 799 | { 800 | key = "Owner" 801 | value = var.owner 802 | propagate_at_launch = true 803 | } 804 | ] 805 | } 806 | 807 | ## Kubernetes Worker 808 | resource "aws_autoscaling_group" "worker" { 809 | max_size = var.worker_max_size 810 | min_size = var.worker_min_size 811 | desired_capacity = var.worker_size 812 | force_delete = true 813 | launch_configuration = aws_launch_configuration.worker.name 814 | vpc_zone_identifier = aws_subnet.private.*.id 815 | 816 | tags = [ 817 | { 818 | key = "Name" 819 | value = "${var.project}-k8s-worker" 820 | propagate_at_launch = true 821 | }, 822 | { 823 | key = "Project" 824 | value = var.project 825 | propagate_at_launch = true 826 | }, 827 | { 828 | key = "Owner" 829 | value = var.owner 830 | propagate_at_launch = true 831 | } 832 | ] 833 | } 834 | 835 | 836 | # Route53 837 | ## Bastion Host 838 | resource "aws_route53_record" "bastion-public" { 839 | zone_id = data.aws_route53_zone.selected.id 840 | name = "bastion" 841 | type = "A" 842 | 843 | alias { 844 | evaluate_target_health = false 845 | name = aws_elb.bastion.dns_name 846 | zone_id = aws_elb.bastion.zone_id 847 | } 848 | } 849 | 850 | ## Kubernetes Master for remote kubectl access 851 | resource "aws_route53_record" "master_lb-public" { 852 | zone_id = data.aws_route53_zone.selected.id 853 | name = "kube" 854 | type = "A" 855 | 856 | alias { 857 | evaluate_target_health = false 858 | name = aws_elb.master-public.dns_name 859 | zone_id = aws_elb.master-public.zone_id 860 | } 861 | } 862 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------