If your account maintains multiple resources that are associated with each other in different ways, you can attach tags to your resources to categorize and manage the resources in a unified manner.

You can attach a maximum of 20 tags to each resource. You can attach and detach up to 20 tags (separately or at a time) to each resource.

To attach resources with tags, follow these steps:

  1. Log on to the ECS console.
  2. In the left-side navigation pane, select the resource type for the attach operation, such as Instance, Disks, Snapshots, Images, and Security Groups.
  3. Select the target region.
  4. Select the target resources in the resource list to attach tags.
  5. Click Edit Tag at the bottom of the resource list.
    Note If the selected resources are instances, select  More > Instance Settings > Edit Tag.
  6. In the dialog box:
    • If the selected resource already has a created tag, click an existing tag, or select from the available tags.
    • If the selected resource has no tags or you want to create a new tag, click Create and set Key and Value.
      Note
      • Key is required whereas Value is optional.
      • Key cannot start with aliyun, http://, or https://. The key is case-insensitive and can contain up to 64 characters.
      • Value cannot start with http:// or https://. The value is case-insensitive and can contain up to 128 characters. It can also be empty.
      • Any tag Key of a resource must be unique. An existing tag with the same key as a newly created tag will be overwritten.
      • Available Tags and Create are grayed out if the selected resources are already attached with 20 tags. You must detach some tags before attaching new tags.
  7. Click Confirm.

To check if tags are successfully attached, use the Edit Tag function of the resource or click Tags in the left-side navigation pane of the ECS console. You can also click Tags with a tag symbol at the top of the resource list to filter resources.