SES SQS SNS RDS EC2 S3 Cloudfront Lambda - sgml/signature GitHub Wiki

testing_serverless_code:
  options:
    - name: OpenFaaS
      url: https://www.openfaas.com
      description: This open-source platform allows you to build, deploy, and test serverless functions using Docker containers. It works seamlessly on Windows.
    - name: VirtualBox
      url: https://www.virtualbox.org
      description: Create a Linux virtual machine to emulate your production environment and test your serverless code.
    - name: VMware
      url: https://www.vmware.com
      description: Create a Linux virtual machine to emulate your production environment and test your serverless code.
    - name: LocalStack
      url: https://localstack.cloud
      description: Emulates a complete cloud stack locally, allowing you to run and test various cloud services on your Windows machine.
    - name: Fn Project
      url: https://fnproject.io
      description: An open-source container-native serverless platform that can be run locally using Docker. It supports multiple languages and offers a flexible runtime.

<!-- Step 1: Clone Blue Database to Create Green Database -->
<xsl:template name="clone-database">
    <xsl:param name="blueDatabase" />
    <xsl:variable name="greenDatabase">
        <xsl:copy-of select="$blueDatabase" />
    </xsl:variable>
</xsl:template>

<!-- Step 2: Apply Schema Changes to Green Database -->
<xsl:template name="apply-schema-changes">
    <xsl:param name="greenDatabase" />
    <xsl:variable name="updatedGreenDatabase">
        <!-- Define schema changes -->
        <xsl:copy>
            <!-- Add or modify tables, fields, etc. -->
            <table name="NewTable">
                <field name="NewField" type="varchar" />
            </table>
        </xsl:copy>
    </xsl:variable>
</xsl:template>

<!-- Step 3: Validate and Test Green Database -->
<xsl:template name="validate-database">
    <xsl:param name="greenDatabase" />
    <xsl:choose>
        <xsl:when test="validation($greenDatabase)">
            <xsl:text>Validation Successful</xsl:text>
        </xsl:when>
        <xsl:otherwise>
            <xsl:text>Validation Failed</xsl:text>
        </xsl:otherwise>
    </xsl:choose>
</xsl:template>

<!-- Step 4: Promote Green Database to Production -->
<xsl:template name="promote-to-production">
    <xsl:param name="greenDatabase" />
    <xsl:variable name="productionDatabase" select="$greenDatabase" />
</xsl:template>

<!-- Step 5: Monitor Green Database and Roll Back if Needed -->
<xsl:template name="monitor-and-rollback">
    <xsl:param name="greenDatabase" />
    <xsl:param name="blueDatabase" />
    <xsl:choose>
        <xsl:when test="monitor($greenDatabase) = 'issues_detected'">
            <xsl:variable name="activeDatabase" select="$blueDatabase" />
            <xsl:text>Rollback Completed</xsl:text>
        </xsl:when>
        <xsl:otherwise>
            <xsl:text>Migration Successful</xsl:text>
        </xsl:otherwise>
    </xsl:choose>
</xsl:template>

stages:
  - stage: "Upgrade from PostgreSQL 11 to PostgreSQL 12"
    steps:
      - step: "Preparation and Backup"
        description: >
          Identify the current production RDS instance (blue environment) running PostgreSQL 11 and take a snapshot for a reliable rollback option.
        url: "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_CommonTasks.BackupRestore.html"
      - step: "Compatibility Review"
        description: >
          Review AWS documentation and PostgreSQL 12 release notes to confirm that your application, extensions, and configurations are supported.
        url: "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_UpgradeDBInstance.Upgrading.html"
      - step: "Initiate Blue/Green Deployment"
        description: >
          Use the RDS Blue/Green Deployments feature to create a green environment that mirrors your current production (blue) instance.
        url: "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/blue-green-deployments-overview.html"
      - step: "Apply Upgrade in Green Environment"
        description: >
          In the green environment, trigger the major engine upgrade from PostgreSQL 11 to PostgreSQL 12 and adjust parameter groups if necessary.
        url: "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_UpgradeDBInstance.Upgrading.html"
      - step: "Testing and Validation"
        description: >
          Run functional, integration, and performance tests using AWS monitoring tools to validate that PostgreSQL 12 is operating as expected.
        url: "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_Monitoring.html"
      - step: "Switchover to Production"
        description: >
          Execute the blue/green switchover to route production traffic to the upgraded PostgreSQL 12 (green) environment with minimal downtime.
        url: "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/blue-green-deployments-overview.html"

  - stage: "Upgrade from PostgreSQL 12 to Latest Version"
    steps:
      - step: "Preparation and Snapshot"
        description: >
          With PostgreSQL 12 now in production, create a fresh snapshot to serve as a rollback baseline before initiating the next upgrade.
        url: "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_CommonTasks.BackupRestore.html"
      - step: "Review New Version Compatibility"
        description: >
          Verify that your application and extensions are compatible with the latest PostgreSQL version by reviewing release notes and AWS documents.
        url: "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_UpgradeDBInstance.Upgrading.html"
      - step: "Initiate Second Blue/Green Deployment"
        description: >
          Trigger a new blue/green deployment from the PostgreSQL 12 environment to create a fresh green environment for the upgrade.
        url: "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/blue-green-deployments-overview.html"
      - step: "Apply Upgrade in the Second Green Environment"
        description: >
          Upgrade the green environment from PostgreSQL 12 to the latest PostgreSQL version available, updating parameter groups as required.
        url: "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_UpgradeDBInstance.Upgrading.html"
      - step: "Comprehensive Testing"
        description: >
          Conduct comprehensive integration, functional, and performance tests to ensure the upgraded environment meets all operational requirements.
        url: "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_PerfInsights.html"
      - step: "Final Switchover"
        description: >
          Complete the final switchover by routing production traffic to the green environment running the latest PostgreSQL version.
        url: "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/blue-green-deployments-overview.html"