Quick reference

Last Updated: Apr 13, 2018

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 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 Management Terminal to connect to an ECS instance regardless of the operating system. Generally, this method is used for troubleshooting and maintenance.
    2. For Linux or Unix-like OS: See Connect to a Linux instance by using an SSH key pair or Connect to a Linux instance by using a password.
    3. For Windows OS: See Connect to a Windows instance.
  3. Stop the ECS instance.

  4. Release the ECS 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.

You can Change operating system if it does not meet your business needs.


You can convert a Pay-As-You-Go instance to a Subscription instance. For more information, see Switch from Pay-As-You-Go to Subscription.

You can renew a Subscription instance manually or automatically. For more information, see Manual renewal and Auto-renewal.

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 the cloud disk.

  3. Partition and format a cloud disk in an instance running Linux or Windows.

  4. Create a snapshot of a cloud disk 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 of the disk to restore data. For more information, see Roll back a cloud disk.

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 the size of the snapshots of a cloud disk.

  3. To save space occupied by snapshots, delete unnecessary snapshots.

Use snapshots

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

To ease environment deployment, create a custom image from a system disk snapshot, and create an ECS instance from the 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 a custom image to back up the environment, and delete unnecessary custom images.

Create and manage security groups

Basic operations

To use a security group, follow these steps:

  1. Create a security group.

  2. Add security group rules.

  3. Move an ECS instance to the security group or remove it from the group.

  4. Delete security group rules.

  5. Delete the secutiry group.

Manage security groups and their rules

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

When new security group rules impair the online business application, you can restore the 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 the SSH key pair after a Linux instance is created or when you create a Linux instance.

  3. Connect to the Linux instance by using an SSH key pair.

  4. Unbind an SSH key pair.

  5. Delete an SSH key pair.

Create and manage ENIs

To use an ENI, follow these steps:

  1. Create an ENI.

  2. Attach the ENI to an existing ECS instance or attach it when you create an ECS instance.

  3. Optional. Configure the ENI.

  4. Detach an ENI from the ECS instance.

  5. Delete the ENI.

Use tags

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

  1. Create and bind tags.

  2. Filter resources by tags.

  3. Unbind or delete tags.

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