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"
}