From 055e7d9935ab6fd3762ac479824e54c08f11d80a Mon Sep 17 00:00:00 2001
From: Magicloud <1886157+Magicloud@users.noreply.github.com>
Date: Fri, 28 Feb 2020 23:13:06 +0800
Subject: [PATCH] New example: Confluence

The example runs Confluence Docker image in a single node ASG, with a RDS, and two ALBs (internal and external). The ALBs have domain names set, and TLS cert (from ACM).
---
 examples/confluence/README.md          |   3 +
 examples/confluence/docker-compose.tpl |  13 ++
 examples/confluence/main.tf            | 308 +++++++++++++++++++++++++
 3 files changed, 324 insertions(+)
 create mode 100644 examples/confluence/README.md
 create mode 100644 examples/confluence/docker-compose.tpl
 create mode 100644 examples/confluence/main.tf

diff --git a/examples/confluence/README.md b/examples/confluence/README.md
new file mode 100644
index 00000000..1ba8f1c3
--- /dev/null
+++ b/examples/confluence/README.md
@@ -0,0 +1,3 @@
+# Confluence
+
+Showing pratical usage of a fully functional website, from HTTPS frontend to Postgres backend.
diff --git a/examples/confluence/docker-compose.tpl b/examples/confluence/docker-compose.tpl
new file mode 100644
index 00000000..8da8e495
--- /dev/null
+++ b/examples/confluence/docker-compose.tpl
@@ -0,0 +1,13 @@
+version: "3.7"
+services:
+  confluence:
+    image: atlassian/confluence-server
+    ports:
+      - "${http_port}:8090"
+    volumes:
+      - /data/confluence:/var/atlassian/application-data/confluence
+    environment:
+      - ATL_JDBC_URL=jdbc:postgresql://${db_host}:5432/${db_db}
+      - ATL_JDBC_USER=${db_user}
+      - ATL_JDBC_PASSWORD='${db_pass}'
+      - ATL_DB_TYPE=postgresql
diff --git a/examples/confluence/main.tf b/examples/confluence/main.tf
new file mode 100644
index 00000000..b88f2b5e
--- /dev/null
+++ b/examples/confluence/main.tf
@@ -0,0 +1,308 @@
+variable "region" {
+  type        = string
+  description = "AWS region to run the example"
+}
+variable "ssh_key" {
+  type        = string
+  description = "AWS SSH key name for instance"
+}
+variable "db_password" {
+  type        = string
+  description = "Password for RDS"
+}
+variable "base_domain" {
+  type        = string
+  description = "Base domain name for internal and external FQDN, with the last dot"
+}
+
+data "aws_availability_zones" "azs" {}
+
+data "aws_route53_zone" "sandbox" {
+  name         = var.base_domain
+  private_zone = false
+}
+
+module "vpc" {
+  source               = "fpco/foundation/aws//modules/vpc-scenario-2"
+  azs                  = data.aws_availability_zones.azs.names
+  cidr                 = "192.168.0.0/16"
+  name_prefix          = "confluence"
+  private_subnet_cidrs = ["192.168.100.0/24", "192.168.101.0/24"]
+  public_subnet_cidrs  = ["192.168.0.0/24", "192.168.1.0/24"]
+  region               = var.region
+}
+
+module "centos" {
+  source  = "fpco/foundation/aws//modules/ami-centos"
+  release = "7"
+}
+
+module "asg-sg" {
+  source      = "fpco/foundation/aws//modules/security-group-base"
+  name        = "asg-sg"
+  description = "SG for ASG"
+  vpc_id      = module.vpc.vpc_id
+}
+
+module "asg-to-world" {
+  source            = "fpco/foundation/aws//modules/open-egress-sg"
+  security_group_id = module.asg-sg.id
+}
+
+module "ssh-port-sg-rule" {
+  source            = "fpco/foundation/aws//modules/single-port-sg"
+  security_group_id = module.asg-sg.id
+  cidr_blocks       = ["0.0.0.0/0"]
+  port              = 22
+  description       = "SSH from anywhere, for debug."
+}
+
+module "asg_int_alb_http_port_sg_rule" {
+  source                   = "git::ssh://git@github.com/fpco/terraform-aws-foundation//modules/single-port-sg?ref=spsg"
+  security_group_id        = module.asg-sg.id
+  port                     = 80
+  description              = "HTTP ingress for int ALB"
+  source_security_group_id = module.int-alb.security_group_id
+}
+
+module "asg_ext_alb_http_port_sg_rule" {
+  source                   = "git::ssh://git@github.com/fpco/terraform-aws-foundation//modules/single-port-sg?ref=spsg"
+  security_group_id        = module.asg-sg.id
+  port                     = 80
+  description              = "HTTP ingress for ext ALB"
+  source_security_group_id = module.ext-alb.security_group_id
+}
+
+module "asg" {
+  source             = "git::ssh://git@github.com/fpco/terraform-aws-foundation//modules/single-node-asg?ref=lb-asg"
+  ami                = module.centos.id
+  instance_type      = "m5.xlarge"
+  key_name           = var.ssh_key
+  name_prefix        = "confluence"
+  name_suffix        = ""
+  region             = var.region
+  security_group_ids = [module.asg-sg.id]
+  subnet_id          = module.vpc.private_subnet_ids[0]
+  public_ip          = false
+  data_volume_size   = 50
+  init_prefix        = <<EOF
+yum install -y python3-pip
+pip3 install awscli
+${module.install-docker-compose.init_snippet}
+EOF
+  init_suffix        = <<EOF
+mkdir -p /data
+mkfs.xfs /dev/xvdf
+mount /dev/xvdf /data
+mkdir -p /data/confluence
+cat > /tmp/docker-compose.yml <<EOCAT
+${data.template_file.docker_compose.rendered}
+EOCAT
+cd /tmp
+docker-compose up -d
+# rm docker-compose.yml
+EOF
+}
+
+data "template_file" "docker_compose" {
+  template = file("${path.module}/docker-compose.tpl")
+  vars = {
+    http_port = 80
+    db_host   = module.rds.endpoint
+    db_db     = "confluence"
+    db_user   = "confluence"
+    db_pass   = var.db_password
+  }
+}
+
+module "data-backup" {
+  source          = "git::ssh://git@github.com/fpco/terraform-aws-foundation//modules/dlm-lifecycle-policy?ref=dlm"
+  name_prefix     = "confluence"
+  ebs_target_tags = { Name = module.asg.data_volume_name_tag }
+}
+
+module "install-docker-compose" {
+  source = "git::ssh://git@github.com/fpco/terraform-aws-foundation//modules/init-snippet-install-docker-yum?ref=install-docker"
+}
+
+module "rds-sg" {
+  source      = "fpco/foundation/aws//modules/security-group-base"
+  name        = "rds-sg"
+  description = "SG for RDS"
+  vpc_id      = module.vpc.vpc_id
+}
+
+module "rds_sg_rule" {
+  source                   = "git::ssh://git@github.com/fpco/terraform-aws-foundation//modules/single-port-sg?ref=spsg"
+  security_group_id        = module.rds-sg.id
+  port                     = 5432
+  description              = "PGSQL ingress for RDS"
+  source_security_group_id = module.asg-sg.id
+}
+
+module "rds" {
+  source            = "git::ssh://git@github.com/fpco/terraform-aws-foundation//modules/rds?ref=rds"
+  db_engine         = "postgres"
+  db_instance_type  = "db.m5.xlarge"
+  db_name           = "confluence"
+  db_password       = var.db_password
+  db_storage_size   = 20
+  db_storage_type   = "gp2"
+  db_username       = "confluence"
+  engine_version    = "11"
+  name_prefix       = "confluence"
+  security_group_id = module.rds-sg.id
+  subnet_ids        = module.vpc.private_subnet_ids
+}
+
+module "int-alb" {
+  source      = "git::ssh://git@github.com/fpco/terraform-aws-foundation//modules/alb?ref=alb"
+  vpc_id      = module.vpc.vpc_id
+  name_prefix = "confluence-int"
+  subnet_ids  = module.vpc.public_subnet_ids
+}
+
+module "int_alb_http_port_sg_rule" {
+  source            = "fpco/foundation/aws//modules/single-port-sg"
+  security_group_id = module.int-alb.security_group_id
+  cidr_blocks       = ["192.168.0.0/16"]
+  port              = 80
+  description       = "HTTP ingress for ALB"
+}
+
+module "int_alb_https_port_sg_rule" {
+  source            = "fpco/foundation/aws//modules/single-port-sg"
+  security_group_id = module.int-alb.security_group_id
+  cidr_blocks       = ["192.168.0.0/16"]
+  port              = 443
+  description       = "HTTPS ingress for ALB"
+}
+
+module "int-alb-to-asg" {
+  source            = "fpco/foundation/aws//modules/open-egress-sg"
+  security_group_id = module.int-alb.security_group_id
+}
+
+module "int-forwarder" {
+  source         = "git::ssh://git@github.com/fpco/terraform-aws-foundation//modules/alb-default-forward?ref=alb"
+  lb_arn         = module.int-alb.lb_arn
+  lb_port        = 443
+  name_prefix    = "confluence-int-https"
+  protocol       = "HTTPS"
+  service_port   = 80
+  vpc_id         = module.vpc.vpc_id
+  https_cert_arn = aws_acm_certificate_validation.validation.certificate_arn
+}
+
+module "int_redirector" {
+  source     = "git::ssh://git@github.com/fpco/terraform-aws-foundation//modules/alb-redirect?ref=alb"
+  lb_arn     = module.int-alb.lb_arn
+  http_port  = 80
+  https_port = 443
+}
+
+module "ext-alb" {
+  source      = "git::ssh://git@github.com/fpco/terraform-aws-foundation//modules/alb?ref=alb"
+  vpc_id      = module.vpc.vpc_id
+  name_prefix = "confluence-ext"
+  subnet_ids  = module.vpc.public_subnet_ids
+  internal    = false
+}
+
+module "ext_alb_http_port_sg_rule" {
+  source            = "fpco/foundation/aws//modules/single-port-sg"
+  security_group_id = module.ext-alb.security_group_id
+  cidr_blocks       = ["0.0.0.0/0"]
+  port              = 80
+  description       = "HTTP ingress for ALB"
+}
+
+module "ext_alb_https_port_sg_rule" {
+  source            = "fpco/foundation/aws//modules/single-port-sg"
+  security_group_id = module.ext-alb.security_group_id
+  cidr_blocks       = ["0.0.0.0/0"]
+  port              = 443
+  description       = "HTTPS ingress for ALB"
+}
+
+module "ext-alb-to-asg" {
+  source            = "fpco/foundation/aws//modules/open-egress-sg"
+  security_group_id = module.ext-alb.security_group_id
+}
+
+module "ext-forwarder" {
+  source         = "git::ssh://git@github.com/fpco/terraform-aws-foundation//modules/alb-default-forward?ref=alb"
+  lb_arn         = module.ext-alb.lb_arn
+  lb_port        = 443
+  name_prefix    = "confluence-ext-https"
+  protocol       = "HTTPS"
+  service_port   = 80
+  vpc_id         = module.vpc.vpc_id
+  https_cert_arn = aws_acm_certificate_validation.validation.certificate_arn
+}
+
+module "ext_redirector" {
+  source     = "git::ssh://git@github.com/fpco/terraform-aws-foundation//modules/alb-redirect?ref=alb"
+  lb_arn     = module.ext-alb.lb_arn
+  http_port  = 80
+  https_port = 443
+}
+
+resource "aws_autoscaling_attachment" "asg_int_alb" {
+  autoscaling_group_name = module.asg.asg_name
+  alb_target_group_arn   = module.int-forwarder.target_group_arn
+}
+
+resource "aws_autoscaling_attachment" "asg_ext_alb" {
+  autoscaling_group_name = module.asg.asg_name
+  alb_target_group_arn   = module.ext-forwarder.target_group_arn
+}
+
+resource "aws_route53_record" "int" {
+  zone_id = data.aws_route53_zone.sandbox.zone_id
+  name    = "c-i.${data.aws_route53_zone.sandbox.name}"
+  type    = "A"
+  alias {
+    name                   = module.int-alb.lb_dns_name
+    zone_id                = module.int-alb.lb_zone_id
+    evaluate_target_health = true
+  }
+}
+
+resource "aws_route53_record" "ext" {
+  zone_id = data.aws_route53_zone.sandbox.zone_id
+  name    = "c-e.${data.aws_route53_zone.sandbox.name}"
+  type    = "A"
+  alias {
+    name                   = module.ext-alb.lb_dns_name
+    zone_id                = module.ext-alb.lb_zone_id
+    evaluate_target_health = true
+  }
+}
+
+resource "aws_acm_certificate" "cert" {
+  domain_name               = aws_route53_record.ext.fqdn
+  subject_alternative_names = [aws_route53_record.int.fqdn]
+  validation_method         = "DNS"
+}
+
+resource "aws_route53_record" "cert_validation_ext" {
+  name    = aws_acm_certificate.cert.domain_validation_options.0.resource_record_name
+  type    = aws_acm_certificate.cert.domain_validation_options.0.resource_record_type
+  zone_id = data.aws_route53_zone.sandbox.id
+  records = [aws_acm_certificate.cert.domain_validation_options.0.resource_record_value]
+  ttl     = 60
+}
+
+resource "aws_route53_record" "cert_validation_int" {
+  name    = aws_acm_certificate.cert.domain_validation_options.1.resource_record_name
+  type    = aws_acm_certificate.cert.domain_validation_options.1.resource_record_type
+  zone_id = data.aws_route53_zone.sandbox.id
+  records = [aws_acm_certificate.cert.domain_validation_options.1.resource_record_value]
+  ttl     = 60
+}
+
+resource "aws_acm_certificate_validation" "validation" {
+  certificate_arn         = aws_acm_certificate.cert.arn
+  validation_record_fqdns = [aws_route53_record.cert_validation_ext.fqdn, aws_route53_record.cert_validation_int.fqdn]
+}