constructor()

in source/resources/lib/nginx/nginx.demo.ts [51:152]

• 69 lines of code
• 2 McCabe index (conditional complexity)

  constructor(scope: Stack, id: string, props?: NestedStackProps) {
    super(scope, id, props);
    const stack = Stack.of(this);
    this.region = stack.region; // Returns the AWS::Region for this stack (or the literal value if known)

    //=============================================================================================
    // Metadata
    //=============================================================================================
    this.templateOptions.description = `(${manifest.solutionId}-Demo) - The AWS CloudFormation template for deployment of the ${manifest.solutionName} Apache workload demo resource. Version ${manifest.solutionVersion}`;
    this.templateOptions.templateFormatVersion = manifest.templateVersion;

    //=============================================================================================
    // Map
    //=============================================================================================
    const map = new CfnMapping(this, "StackMap", {
      mapping: {
        Nginx: {
          AccessLog: Workload.Nginx.AccessLog, // access log for apache instances, change as needed
          InfraConfig:
            "https://%%TEMPLATE_BUCKET%%.s3.amazonaws.com/%%SOLUTION_NAME%%/%%VERSION%%/linux_cw_infra.json", // base infra config file
          NginxConfig:
            "https://%%TEMPLATE_BUCKET%%.s3.amazonaws.com/%%SOLUTION_NAME%%/%%VERSION%%/nginx.config/nginx.json", // apache config file
          httpdConfig:
            "https://%%TEMPLATE_BUCKET%%.s3.amazonaws.com/%%SOLUTION_NAME%%/%%VERSION%%/nginx.config/nginx.conf", // httpd config file
          CloudWatchAgent:
            "https://%%TEMPLATE_BUCKET%%.s3.amazonaws.com/%%SOLUTION_NAME%%/%%VERSION%%/amazon-cloudwatch-agent.rpm",
        },
      },
    });

    //=============================================================================================
    // Resources
    //=============================================================================================
    /**
     * @description creating demo infrastructure
     * @type {DemoConstruct}
     */
    const demoInfra: DemoConstruct = new DemoConstruct(this, "NginxDemoInfra");

    const handle: InitServiceRestartHandle = new InitServiceRestartHandle();

    /**
     * @description cloudformation init configuration for web server
     * @type {CloudFormationInit}
     */
    const init: CloudFormationInit = CloudFormationInit.fromElements(
      InitPackage.rpm(map.findInMap("Nginx", "CloudWatchAgent"), {}),
      InitCommand.shellCommand("amazon-linux-extras install -y nginx1", {
        serviceRestartHandles: [handle],
      }),
      InitFile.fromUrl(
        "/opt/aws/amazon-cloudwatch-agent/bin/infra_config.json",
        map.findInMap("Nginx", "InfraConfig")
      ),
      InitFile.fromUrl(
        "/opt/aws/amazon-cloudwatch-agent/bin/nginx_config.json",
        map.findInMap("Nginx", "NginxConfig")
      ),
      InitFile.fromUrl(
        "/etc/nginx/nginx.conf",
        map.findInMap("Nginx", "httpdConfig")
      ),
      InitService.enable("nginx", {
        enabled: true,
        ensureRunning: true,
        serviceRestartHandle: handle,
      })
    );

    /**
     * @description web server instance
     * @type {Instance}
     */
    const demoEC2: Instance = new Instance(this, "NginxDemoEC2", {
      vpc: demoInfra.demoVPC,
      instanceType: new InstanceType("t3.micro"),
      machineImage: MachineImage.latestAmazonLinux({
        virtualization: AmazonLinuxVirt.HVM,
        generation: AmazonLinuxGeneration.AMAZON_LINUX_2,
        cpuType: AmazonLinuxCpuType.X86_64,
      }),
      init: init,
      securityGroup: demoInfra.demoSecurityGroup,
    });

    demoEC2.addUserData(
      'echo "======setting up cloudwatch agent======"',
      "/opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -a fetch-config -m ec2 -s -c file:/opt/aws/amazon-cloudwatch-agent/bin/infra_config.json",
      "/opt/aws/amazon-cloudwatch-agent/bin/amazon-cloudwatch-agent-ctl -a append-config -m ec2 -s -c file:/opt/aws/amazon-cloudwatch-agent/bin/nginx_config.json",
      "curl 127.0.0.1"
    );

    demoEC2.role.attachInlinePolicy(demoInfra.demoInstancePolicy);

    //=============================================================================================
    // Output
    //=============================================================================================
    new CfnOutput(this, "Web URL", {
      description: "URL for nginx demo server",
      value: `http://${demoEC2.instancePublicIp}`,
    });
  }