Updated on 2022-02-22 GMT+08:00

Creating a DB Instance

Function

This API is used to create cluster and replica set instances.

URI

  • URI format

    POST /v3/{project_id}/instances

  • Parameter description
    Table 1 Parameter description

    Name

    Mandatory

    Description

    project_id

    Yes

    Specifies the project ID of a tenant in a region.

Requests

  • Parameter description
    Table 2 Parameter description

    Name

    Mandatory

    Type

    Description

    name

    Yes

    String

    Specifies the DB instance name. The DB instance name of the same DB engine is unique for the same tenant.

    The value must be 4 to 64 characters in length and start with a letter (from A to Z or from a to z). It is case-sensitive and can contain only letters, digits (from 0 to 9), hyphens (-), and underscores (_).

    datastore

    Yes

    Object

    Specifies the database information. For more information, see Table 3.

    region

    Yes

    String

    Specifies the region ID.

    availability_zone

    Yes

    String

    Specifies the AZ ID. For details, see az_status returned in Querying All DB Instance Specifications. A user can select multiple AZs to create a cross-AZ cluster.

    vpc_id

    Yes

    String

    Specifies the VPC ID. To obtain this parameter value, use either of the following methods:

    • Method 1: Log in to VPC console and view the VPC ID on the VPC details page.
    • Method 2: See the "Querying VPCs" section in the Virtual Private Cloud API Reference.

    subnet_id

    Yes

    String

    Specifies the network ID of the subnet. To obtain this parameter value, use either of the following methods:

    • Method 1: Log in to VPC console and click the target subnet on the Subnets page. You can view the network ID on the displayed page.
    • Method 2: See the "Querying Subnets" section in the Virtual Private Cloud API Reference.

    security_group_id

    Yes

    String

    Specifies the security group ID. To obtain the security group ID, perform either of the following methods:

    • Method 1: Log in to VPC console. Choose Access Control > Security Groups in the navigation pane on the left. On the displayed page, click the target security group. You can view the security group ID on the displayed page.
    • Method 2: See the "Querying Security Groups" section in the Virtual Private Cloud API Reference.

    password

    No

    String

    Specifies the database password.

    The value must be 8 to 32 characters in length and contain uppercase letters (A to Z), lowercase letters (a to z), digits (0 to 9), and special characters, such as ~!@#%^*-_=+?

    You are advised to enter a strong password to improve security, preventing security risks such as brute force cracking.

    mode

    Yes

    String

    Specifies the instance type.

    Valid value:

    • Sharding
    • ReplicaSet

    flavor

    Yes

    Array of objects

    Specifies the instance specifications. For more information, see Table 4.

    For details about how to obtain the value, see the response values of flavor in Querying All DB Instance Specifications.

    backup_strategy

    No

    Object

    Specifies the advanced backup policy. For more information, see Table 5.

    ssl_option

    No

    String

    Specifies whether to enable or disable SSL.

    Valid value:

    • The value 0 indicates that SSL is disabled by default.
    • The value 1 indicates that SSL is enabled by default.
    • If this parameter is not transferred, SSL is enabled by default.
    Table 3 datastore field data structure description

    Name

    Mandatory

    Type

    Description

    type

    Yes

    String

    Specifies the database type. The value is DDS-Community.

    version

    Yes

    String

    Specifies the database version. Versions 3.4, and 4.0 are supported. The value is 3.4 or 4.0.

    storage_engine

    Yes

    String

    Specifies the storage engine. Currently, DDS supports the WiredTiger storage engine. The value is wiredTiger.

    Table 4 flavor field data structure description

    Name

    Mandatory

    Type

    Description

    type

    Yes

    String

    Specifies the node type.

    Valid value:

    • For a cluster instance, the value can be mongos, shard, or config.
    • For a replica set instance, the value is replica.

    num

    Yes

    Integer

    Specifies node quantity.

    Valid value:

    • config: The value is 1.
    • replica: The value is 1.

    storage

    This parameter is optional for all nodes except mongos. This parameter is invalid for the mongos nodes.

    String

    Specifies the disk type.

    Valid value: ULTRAHIGH, which indicates the type SSD.

    This parameter is valid for the shard and config nodes of a cluster instance and for replica set instances. This parameter is invalid for mongos nodes. Therefore, you do not need to specify the storage space for mongos nodes.

    size

    This parameter is mandatory for all nodes except mongos. This parameter is invalid for the mongos nodes.

    Integer

    Specifies the disk size.

    The value must be a multiple of 10. The unit is GB.

    • For a cluster instance, the storage space of a shard node can be 10 to 2000 GB, and the config storage space is 20 GB. This parameter is invalid for mongos nodes. Therefore, you do not need to specify the storage space for mongos nodes.

    spec_code

    Yes

    String

    Specifies the resource specification code. For details about how to obtain the value, see the response values of spec_code in Querying All DB Instance Specifications.

    In a cluster instance, multiple specifications need to be specified. All specifications must be of the same series, that is, general-purpose (s6), enhanced (c3), or enhanced II (c6).

    Table 5 backup_strategy field data structure description

    Name

    Mandatory

    Type

    Description

    start_time

    Yes

    String

    Specifies the backup time window. Automated backups will be triggered during the backup time window.

    The value cannot be empty. It must be a valid value in the "hh:mm-HH:MM" format. The current time is in the UTC format.

    • The HH value must be 1 greater than the hh value.
    • The values of mm and MM must be the same and must be set to 00.

    Example value:

    23:00-00:00

    keep_days

    No

    String

    Specifies the number of days to retain the generated backup files.

    The value range is from 0 to 732.

    • If this parameter is set to 0, the automated backup policy is not set.
    • If this parameter is not transferred, the automated backup policy is enabled by default. Backup files are stored for seven days by default.

The values of region and availability_zone are used as examples.

  • Request header
    POST https://DDS endpoint/v3/{project_id}/instances.
  • Example request
    Create a cluster instance:
    {
      "name": "test-cluster-01",
      "datastore": {
        "type": "DDS-Community",
        "version": "3.4",
        "storage_engine": "wiredTiger"
      },
      "region": "aaa",
      "availability_zone": "bbb",
      "vpc_id": "674e9b42-cd8d-4d25-a2e6-5abcc565b961",
      "subnet_id": "f1df08c5-71d1-406a-aff0-de435a51007b",
      "security_group_id": "7aa51dbf-5b63-40db-9724-dad3c4828b58",
      "password": "Test#%0_",
      "mode": "Sharding",
      "flavor": [
        {
          "type": "mongos",
          "num": 2,
          "spec_code": "dds.c3.medium.4.mongos"
        },
        {
          "type": "shard",
          "num": 2,
          "storage": "ULTRAHIGH",
          "size": 20,
          "spec_code": "dds.c3.medium.4.shard"
        },
        {
          "type": "config",
          "num": 1,
          "storage": "ULTRAHIGH",
          "size": 20,
          "spec_code": "dds.c3.large.2.config"
        }
      ],
      "backup_strategy": {
        "start_time": "23:00-00:00",
        "keep_days": "8"
      },
      "ssl_option":"1"
    }
    Create a replica set instance.
    {
      "name": "test-replicaset",
      "datastore": {
        "type": "DDS-Community",
        "version": "3.4",
        "storage_engine": "wiredTiger"
      },
      "region": "aaa",
      "availability_zone": "bbb",
      "vpc_id": "674e9b42-cd8d-4d25-a2e6-5abcc565b961",
      "subnet_id": "f1df08c5-71d1-406a-aff0-de435a51007b",
      "security_group_id": "7aa51dbf-5b63-40db-9724-dad3c4828b58",
      "password": "Test#%0_",
      "mode": "ReplicaSet",
      "flavor": [
        {
          "type": "replica",
          "num": 1,
          "storage": "ULTRAHIGH",
          "size": 30,
          "spec_code": "dds.s2.medium.4.shard"
        }
      ],
      "backup_strategy": {
        "start_time": "23:00-00:00",
        "keep_days": "8"
      },
      "ssl_option":"1"
    }

Responses

  • Parameter description
    Table 6 Parameter description

    Name

    Type

    Description

    id

    String

    Indicates the DB instance ID.

    name

    String

    Same as the request parameter.

    datastore

    Object

    Indicates the database information, which is the same as the request parameter. For more information, see Table 3.

    created

    String

    Indicates the creation time in the following format: yyyy-mm-dd hh:mm:ss.

    status

    String

    Indicates the DB instance status. The value is creating.

    region

    String

    Indicates the region ID, which is the same as the request parameter.

    availability_zone

    String

    Indicates the AZ ID, which is the same as the request parameter.

    vpc_id

    String

    Indicates the VPC ID, which is the same as the request parameter.

    subnet_id

    String

    Indicates the network ID of the subnet, which is the same as the request parameter.

    security_group_id

    String

    Indicates the security group ID, which is the same as the request parameter.

    mode

    String

    Indicates the instance type, which is the same as the request parameter.

    flavor

    Array of objects

    Indicates the instance specification, which is the same as the request parameter. For more information, see Table 4.

    backup_strategy

    Object

    Indicates the advanced backup policy, which is the same as the request parameter. For more information, see Table 5.

    ssl_option

    String

    Indicates whether to enable SSL, which functions the same as the request parameter.

    job_id

    String

    Indicates the ID of the workflow for creating a DB instance.

The values of region and availability_zone are used as examples.

  • Response example
    Cluster instance:
    { 
        "id": "39b6a1a278844ac48119d86512e0000bin02",
        "name": "test-cluster-01",
        "datastore": {
            "type": "DDS-Community",
            "version": "3.4",
            "storage_engine": "wiredTiger"
        },
        "created": "2019-01-16 09:34:36",
        "status": "creating",
        "region": "aaa",
        "availability_zone": "bbb",
        "vpc_id": "674e9b42-cd8d-4d25-a2e6-5abcc565b961",
        "subnet_id": "f1df08c5-71d1-406a-aff0-de435a51007b",
        "security_group_id": "7aa51dbf-5b63-40db-9724-dad3c4828b58",
     
        "mode": "Sharding",
        "flavor": [
            {
                "type": "mongos",
                "num": 2,
                "spec_code": "dds.c3.medium.4.mongos"
            },
            {
                "type": "shard",
                "num": 2,
                "spec_code": "dds.c3.medium.4.shard",
                "size": 20
            },
            {
                "type": "config",
                "num": 1,
                "spec_code": "dds.c3.large.2.config",
                "size": 20
            }
        ],
        "backup_strategy": {
            "start_time": "23:00-00:00",
            "keep_days": "8"
        },
        "ssl_option":"1",
        "job_id": "c010abd0-48cf-4fa8-8cbc-090f093eaa2f"
    }
    Replica set instance:
    {
        "id": "46dfadfd2b674585a430217f23606cd7in02",
        "name": "test-replicaset",
        "datastore": {
            "type": "DDS-Community",
            "version": "3.4",
            "storage_engine": "wiredTiger"
        },
        "created": "2019-01-16 09:33:08",
        "status": "creating",
        "region": "aaa",
        "availability_zone": "bbb",
        "vpc_id": "674e9b42-cd8d-4d25-a2e6-5abcc565b961",
        "subnet_id": "f1df08c5-71d1-406a-aff0-de435a51007b",
        "security_group_id": "7aa51dbf-5b63-40db-9724-dad3c4828b58",
        "mode": "ReplicaSet",
        "flavor": [
            {
                "type": "replica",
                "num": 1,
                "spec_code": "dds.s2.medium.4.shard",
                "size": 30
            }
        ],
        "backup_strategy": {
            "start_time": "23:00-00:00",
            "keep_days": "7"
        },
        "ssl_option":"1",
        "job_id": "2408417d-fd4b-40ae-bec6-e09ce594eb5f"
    }

Status Code

For more information, see Status Code.

Error Code

For more information, see Error Code.