*`instance_name` - (Optional) The name of the ECS. This instance_name can have a string of 2 to 128 characters, must contain only alphanumeric characters or hyphens, such as "-",".","\_", and must not begin or end with a hyphen, and must not begin with http:// or https://. If not specified,
*`system_disk_category` - (Optional) Valid values are `cloud`, `cloud_efficiency`, `cloud_ssd`, For I/O optimized instance type, `cloud_ssd` and `cloud_efficiency` disks are supported. For non I/O Optimized instance type, `cloud` disk are supported.
*`system_disk_size` - (Optional) Size of the system disk, value range: 40GB ~ 500GB. Default is 40GB.
*`description` - (Optional) Description of the instance, This description can have a string of 2 to 256 characters, It cannot begin with http:// or https://. Default value is null.
*`internet_charge_type` - (Optional) Internet charge type of the instance, Valid values are `PayByBandwidth`, `PayByTraffic`. Default is `PayByBandwidth`.
*`internet_max_bandwidth_in` - (Optional) Maximum incoming bandwidth from the public network, measured in Mbps (Mega bit per second). Value range: [1, 200]. If this value is not specified, then automatically sets it to 200 Mbps.
`internet_charge_type` is `PayByBandwidth`: this value range [0, 100], If this value is not specified, then automatically sets it to 0 Mbps; If `internet_charge_type` is `PayByTraffic`: this value range [1, 100]. this value must be set value, such as 5.
*`host_name` - (Optional) Host name of the ECS, which is a string of at least two characters. "hostname” cannot start or end with ".” or "-". In addition, two or more consecutive ".” or "-" symbols are not allowed. On Windows, the host name can contain a maximum of 15 characters, which can be a combination of uppercase/lowercase letters, numerals, and "-". The host name cannot contain dots (".”) or contain only numeric characters.
On other OSs such as Linux, the host name can contain a maximum of 30 characters, which can be segments separated by dots (".”), where each segment can contain uppercase/lowercase letters, numerals, or "\_".
*`password` - (Optional) Password to an instance is a string of 8 to 30 characters. It must contain uppercase/lowercase letters and numerals, but cannot contain special symbols.
*`vswitch_id` - (Optional) The virtual switch ID to launch in VPC. If you want to create instances in VPC network, this parameter must be set.
*`instance_charge_type` - (Optional) Valid values are `PrePaid`, `PostPaid`, The default is `PostPaid`.
*`period` - (Optional) The time that you have bought the resource, in month. Only valid when instance_charge_type is set as `PrePaid`. Value range [1, 12].
*`tags` - (Optional) A mapping of tags to assign to the resource.
## Attributes Reference
The following attributes are exported:
*`id` - The instance ID.
*`availability_zone` - The Zone to start the instance in.
*`instance_name` - The instance name.
*`host_name` - The instance host name.
*`description` - The instance description.
*`status` - The instance status.
*`image_id` - The instance Image Id.
*`instance_type` - The instance type.
*`instance_network_type` - The instance network type and it has two values: `vpc` and `classic`.
*`io_optimized` - The instance whether I/O optimized.
*`private_ip` - The instance private ip.
*`public_ip` - The instance public ip.
*`vswitch_id` - If the instance created in VPC, then this value is virtual switch ID.