Topfunky demo patch

01_read_state/primary/main.tf

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+# primary/main.tf
+output "public_ip" {
+  value = "8.8.8.8"
+}

01_read_state/secondary/main.tf

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+# secondary/main.tf
+# Read state from another Terraform config’s state
+data "terraform_remote_state" "primary" {
+  backend = "local"
+  config = {
+    path = "../primary/terraform.tfstate"
+  }
+}
+
+output "primary_public_ip" {
+  value = data.terraform_remote_state.primary.outputs.public_ip
+}

02_store_state/read_state/main.tf

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+terraform {
+  backend "remote" {
+    organization = "<ORGANIZATION NAME>"
+
+    workspaces {
+      name = "lab_2_read_state"
+    }
+  }
+}
+
+resource "random_id" "random" {
+  keepers = {
+    uuid = uuid()
+  }
+
+  byte_length = 8
+}
+
+data "terraform_remote_state" "write_state" {
+  backend = "remote"
+
+  config = {
+    organization = "<ORGANIZATION NAME>"
+
+    workspaces = {
+      name = "lab_2_write_state"
+    }
+  }
+}

02_store_state/write_state/main.tf

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+# lab_2_terraform_cloud_demo/write_state/main.tf
+terraform {
+  backend "remote" {
+    organization = "<ORGANIZATION NAME>"
+
+    workspaces {
+      name = "lab_2_write_state"
+    }
+  }
+}
+
+
+resource "random_id" "random" {
+  keepers = {
+    uuid = uuid()
+  }
+
+  byte_length = 8
+}
+
+output "random" {
+  value = random_id.random.hex
+}

03_tfc_basics/assets/setup-web.sh

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+#!/usr/bin/env sh
+
+cp /tmp/assets/webapp /usr/local/bin/
+chmod +x /usr/local/bin/*
+cp /tmp/assets/webapp.service /lib/systemd/system/webapp.service
+service webapp start
+systemctl enable webapp
+

03_tfc_basics/assets/webapp.service

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+[Install]
+WantedBy=multi-user.target
+
+[Unit]
+Description=Demo web app
+
+[Service]
+ExecStart=/usr/local/bin/webapp >> /var/log/webapp.log
+IgnoreSIGPIPE=false
+KillMode=process
+Restart=on-failure
+

03_tfc_basics/main.tf

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+terraform {
+  required_version = ">= 0.12.0"
+}
+
+provider "aws" {
+  region = var.region
+  version = ">= 2.27.0"
+
+}
+
+  module "keypair" {
+  source  = "mitchellh/dynamic-keys/aws"
+  version = "2.0.0"
+  name   = "${var.identity}-key"
+}
+
+module "server" {
+  source = "./server"
+
+  num_webs     = var.num_webs
+  identity     = var.identity
+  ami          = var.ami
+  ingress_cidr = var.ingress_cidr
+  key_name     = module.keypair.key_name
+  private_key  = module.keypair.private_key_pem
+}
+

03_tfc_basics/outputs.tf

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+output "public_ip" {
+  value = module.server.public_ip
+}
+
+output "public_dns" {
+  value = module.server.public_dns
+}
+

03_tfc_basics/server/main.tf

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+resource "aws_security_group" "default" {
+  name_prefix = var.identity
+
+  ingress {
+    from_port   = 80
+    to_port     = 80
+    protocol    = "tcp"
+    cidr_blocks = [var.ingress_cidr]
+  }
+
+  ingress {
+    from_port   = 22
+    to_port     = 22
+    protocol    = "tcp"
+    cidr_blocks = [var.ingress_cidr]
+  }
+
+  egress {
+    from_port   = 0
+    to_port     = 0
+    protocol    = "-1"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+
+  tags = {
+    Created-by = "Terraform"
+    Identity   = var.identity
+  }
+}
+
+resource "aws_instance" "web" {
+  ami           = var.ami
+  instance_type = "t2.medium"
+  count         = var.num_webs
+
+  vpc_security_group_ids = [aws_security_group.default.id]
+
+  key_name = var.key_name
+
+  tags = {
+    Name     = "${var.identity} web ${count.index + 1}/${var.num_webs}"
+    Identity = var.identity
+  }
+
+  connection {
+    type        = "ssh"
+    user        = "ubuntu"
+    private_key = var.private_key
+    host        = self.public_ip
+  }
+
+  provisioner "file" {
+    source      = "assets"
+    destination = "/tmp/"
+  }
+
+  provisioner "remote-exec" {
+    inline = [
+      "sudo sh /tmp/assets/setup-web.sh",
+    ]
+  }
+}
+

03_tfc_basics/server/outputs.tf

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+output "public_ip" {
+  value = [aws_instance.web.*.public_ip]
+}
+
+output "public_dns" {
+  value = [aws_instance.web.*.public_dns]
+}
+

03_tfc_basics/server/variables.tf

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+variable "private_key" {
+  description = "EC2 instance private key - generated"
+}
+
+variable "key_name" {
+  description = "Key name - generated"
+}
+
+variable "ami" {
+  description = "Base machine image for running this server"
+}
+
+variable "num_webs" {
+  description = "The number of servers to create"
+  default     = 1
+}
+
+variable "identity" {
+  description = "A unique name for this server"
+}
+
+variable "ingress_cidr" {
+  description = "IP address block from which connections to this instance will be made"
+}

03_tfc_basics/terraform.tfvars.example

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+identity="demo-wallaby"
+ingress_cidr="0.0.0.0/0"
+public_key="AAAA"
+private_key="AAAA"

03_tfc_basics/variables.tf

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+variable "identity" {
+  description = "A unique name for your resources"
+}
+
+variable "ami" {
+  description = "The Amazon Machine Image for new instances."
+  default     = "ami-0735ea082a1534cac"
+}
+
+variable "ingress_cidr" {
+  default     = "0.0.0.0/0"
+  description = "IP block from which connections to this instance will be made"
+}
+
+
+variable "num_webs" {
+  description = "The number of servers to run"
+  default     = "1"
+}
+
+variable "region" {
+  default = "us-east-1"
+}

03_tfc_basics/webapp/.gitignore

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+rice-box.go
+dist/*

03_tfc_basics/webapp/README.md

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+# Web app
+
+A web app written in Go that uses websockets to log visits and push notifications to all visitors.
+
+Defaults to running on port 80. Set `PORT` as ENV var to specify another port.
+
+### Build
+
+Build for Linux and Darwin:
+
+    ./bin/build
+
+Output can be found in `dist`.
+
+A copy of the Linux executable will also be copied to `../assets` for deployment with Terraform.
+
+### Run
+
+    PORT=8080 go run main.go
+
+### View
+
+    http://localhost:8080
+
+## Credits
+
+Browser icons from https://github.com/alrra/browser-logos
+
+

03_tfc_basics/webapp/assets/app.js

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+var data = [{ date: new Date(), value: 1 }];
+var ids = {};
+
+const windowWidth = $(window).width();
+function renderChart(data) {
+  MG.data_graphic({
+    title: "Visits",
+    description: "This graphic shows a time series of page views.",
+    data: data,
+    width: windowWidth < 800 ? windowWidth - 40 : 700,
+    height: windowWidth < 800 ? 150 : 250,
+    chart_type: "histogram",
+    bins: 30,
+    bar_margin: 0,
+    target: "#chart",
+    x_accessor: "date",
+    y_accessor: "value"
+  });
+}
+
+renderChart(data);
+
+function addTableRow(record) {
+  // {browser:"firefox", epochs:39929283829, ip:"10.0.0.1", agent:"Chrome 238.23"}
+  $("#visits tbody").prepend(
+    '<tr><td><img src="images/128/' +
+      record.browser +
+      '_128x128.png"></td><td>' +
+      '<div class="metadata"><span class="time">' +
+      moment(record.epochs).format("LT") +
+      "</span></div>" +
+      '<div class="agent">' +
+      record.agent +
+      "</div>" +
+      "</td></tr>"
+  );
+}
+
+function logVisit(record) {
+  if (ids[record.id] === undefined) {
+    record.date = new Date(record.epochs);
+    data.push(record);
+    renderChart(data);
+    addTableRow(record);
+    ids[record.id] = 1;
+  }
+}
+
+var socket = io({ transports: ["websocket"] });
+
+// Listen for messages
+socket.on("message", function(message) {
+  logVisit(message);
+});
+
+socket.on("connect", function() {
+  // Broadcast a message
+  var message = {};
+  const epochs = new Date().getTime();
+
+  function broadcastMessage() {
+    message.epochs = new Date().getTime();
+    message.id = message.epochs;
+    socket.emit("send", message, function(result) {
+      // Silent success
+    });
+  }
+
+  message = {
+    id: epochs,
+    browser: navigator.appName.toLowerCase(),
+    epochs: epochs,
+    agent: navigator.userAgent,
+    value: 1
+  };
+  broadcastMessage();
+
+  setInterval(broadcastMessage, 30 * 1000);
+});