You can use tags to identify resources. Tags allow enterprises and individuals to categorize their ECS resources and simplify the search and management of resources. This topic describes how to use the tag feature for ECS file backup.
Prerequisites
Background information
You can create different tags for different ECS instances. For example, if you manage
teams or projects, you can create tags by department or project and use these tags
to categorize your instances. For example, you can create a tag named project:a
for a project. This way, you can filter ECS instances based on the tag when you maintain
ECS instances.
Usage notes
- Each tag consists of a key-value pair.
- A tag must be unique.
For example, the
company:a
tag is added to a backup vault. If you add thecompany:b
tag to the backup vault, the company:a tag is replaced by thecompany:b
tag. - Tags are not shared across regions. For example, tags that are created in the China (Hangzhou) region are invisible to the China (Shanghai) region.
Limits
Item | Limit |
---|---|
The maximum length of a key | 128 characters |
The maximum length of a value | 128 characters |
The maximum number of custom tags that you can add to a resource | 20 |
The key of a tag |
|
The value of a tag | A tag value cannot contain http:// or https:// .
|
Create tags
Search for a resource by tag
- You can search for a resource by using a key, as shown in the following example:
aaa
- You can search for a resource by using a key-value pair, as shown in the following
example:
aaa:bbb
- You can search for a resource by using multiple key-value pairs, as shown in the following
example:
aaa:bbb,ccc:ddd
