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MongoDB Replica Set Creation

In the WAP console, click MongoDB → Create Cluster → Create MongoDB to enter the MongoDB cluster creation wizard.

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1. Parameter Description

  • Project

    Select an existing Project, which is used for resource, network, and permission isolation.

  • VPC

    Select the VPC used by the MongoDB cluster based on the Project’s Region:

    • Default-VPC

      The VPC where the WAP Server is deployed (available only when MongoDB and WAP are deployed in the same Region).

    • wap-vpc

      If this VPC does not exist in the current Region, WAP will automatically create it.

  • Cluster Name

    • The name of the MongoDB replica set, used as the unique cluster-level identifier.

  • MongoDB VersionSelect the MongoDB version to deploy.

    Custom MongoDB installation packages can be uploaded via Upload MongoDB.

  • MongoDB Node

    • The number of nodes in the replica set, corresponding to the number of EC2 instances to be created (commonly 3 or 5 nodes).

  • EC2 Type

    • The EC2 instance type used for MongoDB nodes, which determines CPU and memory resources.

  • Available ZoneAWS Availability Zone selection:

    • Single Availability Zone deployment
    • Multi-Availability Zone deployment (supports up to 3 AZs to improve high availability)

  • Storage

    • Size

      • Data disk size, default is 100 GB.

    • Volume Type

      • EBS volume type, default is gp3.

    • IOPS

      • Baseline disk IOPS, default is 3000.

  • Auto Scaling

    • Enables automatic scaling. When resource usage reaches defined thresholds, WAP will automatically upgrade the instance type based on built-in policies.

  • Auth LevelMongoDB authentication method:

    • Username / Password
    • Certificate-based authentication

  • Username

    • MongoDB administrator username.

  • Password

    • MongoDB administrator password.

  • Authentication Database

    • MongoDB authentication database, default is admin.

2. Automated AWS Internal Workflow (Replica Set)

After clicking Create, WAP automatically performs the following steps within AWS:

  1. Resource Validation

    Validate the Project, Region, VPC, and Availability Zones.

    Verify the integrity and version compatibility of the MongoDB installation package.

  2. Network and Security Configuration

    Create or reuse the target VPC and subnets.

    Automatically configure Security Groups to allow required MongoDB ports.

    Configure internal network connectivity between nodes.

  3. EC2 Instance Provisioning

    Create instances based on the selected EC2 type and AZ distribution.

    Attach gp3 data volumes and configure IOPS.

    Automatically configure hostnames and private IP addresses.

  4. Operating System Initialization

    Execute OS tuning scripts (ulimit, sysctl, THP, NUMA, etc.).

    Install required dependencies for MongoDB runtime.

  5. MongoDB Installation and Configuration

    Extract and install the specified MongoDB version.

    Automatically generate mongod.conf.

    Configure data directories, log directories, and WiredTiger parameters.

  6. Replica Set Initialization

    Start all mongod instances.

    Automatically execute rs.initiate().

    Complete Primary election based on node order.

  7. Authentication and Security Initialization

    Create the MongoDB administrator user.

    Enable MongoDB authentication.

    Store credentials in the WAP centralized credential management module.

  8. Cluster Onboarding

    Register the cluster with the WAP platform.

    Enable monitoring, logging, and alerting.

    Update the cluster status to Running.