When using ECS, you may encounter various issues, such as connecting to the instance, resizing the disk, upgrading or downgrading the instance configurations, and using snapshots or images. This article provides you with a quick reference to popular features of ECS resources.

Operation instructions and limits

To guarantee proper operation of your ECS instance, You must carefully read all the ECS operation instructions and Limits before you use it.

Create and manage ECS instances

Basic operations

To use an ECS instances, follow these steps:

  1.  Create an ECS instance.
  2. Connect to the ECS instance. Use different methods according to its operating system:
    1. Use the Management Terminal regardless of the operating system. Generally, this method is used for troubleshooting and maintenance.
    2. For Linux or Unix-like OS: Connect to a Linux instance by using a password, or Connect to a Linux instance by using an SSH key pair.
    3. For Windows OS: Connect to a Windows instance
  3. Stop the ECS instance.
  4. Release the instance.
Change configurations

You can change the instance type, IP addresses, and network bandwidth of your instance if the configurations cannot meet your business needs.

If the current operating system does not meet your needs, you can change the operating system.


You can switch from Pay-As-You-Go to subscription.

You can use different ways to renew Subscription instances:
Elaborate management of and control over ECS instances

You can use the following features to elaborate management of and control over ECS instances:

Create and manage cloud disks

Basic operations

To use a cloud disk as a data disk, follow these steps:

  1. Create a cloud disk.
  2. Attach a cloud disk.
  3. (Linux) Format and mount a data disk or (Windows) Format a data disk.
  4. Create snapshots to back up data.
  5. Detach a cloud disk.
  6. Release a cloud disk.
Change configurations

When the capacity of the system disks or data disks cannot meet your business needs, you can increase system disk size or resize the data disks. For more information about resizing a data disk, see Linux _ Resize a data disk and Windows _ Resize a data disk.

Manage data on a cloud disk

When errors occur to data on a cloud disk, you can use a snapshot to roll back a cloud disk of the disk to restore data.

If you want to restore a cloud disk to its initial status after it is created, you can reinitialize a cloud disk.

If you want to copy data on an existing cloud disk to a new, empty cloud disk, you can create a cloud disk from a snapshot.

Create and manage snapshots

Basic operations

To use a snapshot, follow these steps:

  1. Create a snapshot by using either of the following methods:
  2. View a snapshot chain.
  3. To save space occupied by snapshots, delete unnecessary snapshots.
Using snapshots

To copy or back up data: you can use a snapshot to create a cloud disk from a snapshot, or roll back a cloud disk.

To ease environment deployment, you can use a system disk snapshot to create a custom image using a snapshot, and create an instance from a custom Image.

Create and manage custom images

Only custom images can be operated in the ECS console. Using custom images can simplify environment deployment.

You can own a custom image by using the following methods:

You can export custom images to back up the environment and delete custom images.

Create and manage security groups

Manage security groups and their rules

To simplify business deployment, you can clone a security group across regions or network types.

When new security group rules impair the online business application, you can  restore security group rules fully or partially.

Create and manage SSH key pairs

To use an SSH key pair, follow these steps:

  1. Create an SSH key pair, or import an SSH key pair.
  2. Bind a SSH key pair, or bind the SSH key pair after a Linux instance is created or when you create an instance.
  3. Connect to a Linux instance by using an SSH key pair.
  4. Unbind an SSH key pair.
  5. Delete a SSH key pair.

Create and manage ENIs

To use an ENI, follow these steps:

  1. Create an ENI.
  2. Attach an ENI to an instance, or  attach an ENI when creating an instance.
  3. Optional. Configure an ENI.
  4. Detach an ENI from an instance.
  5. Delete an ENI.

Use tags

You can use tags to group resources to improve efficiency. To use tags, follow these steps:

  1. Add a tag to resources.
  2. Filter resources by tags.
  3. Delete a tag.