• MapReduce Service

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  2. MapReduce Service
  3. User Guide
  4. Cluster Operation Guide
  5. Managing Cluster Tags

Managing Cluster Tags

Tags are used to identify clusters. Adding tags to clusters can help you identify and manage your cluster resources.

You can add a maximum of 10 tags to a cluster when creating the cluster or add them on the details page of the created cluster.

A tag consists of a tag key and a tag value. Table 1 provides tag key and value requirements.

Table 1 Tag key and value requirements

Parameter

Requirement

Example

Key

  • This field cannot be left blank.
  • A tag key must be unique for a cluster.
  • A tag key contains a maximum of 36 characters.
  • Only digits, letters, underscores (_), hyphens (-) are allowed.

Organization

Value

  • A tag value contains a maximum of 64 characters.
  • Only digits, letters, underscores (_), hyphens (-) are allowed.

Apache

You can perform the following operations on tags:

  • On the Create Cluster page, add tags to a cluster when creating the cluster. For details, see Adding Tags to a Cluster.
  • On the Active Cluster page, search for the target cluster by tag key or tag value. For details, see Searching for the Target Cluster.
  • On the Tag tab page of an existing cluster, view, add, modify, and delete tags. For details, see Managing Tags.

Adding Tags to a Cluster

You perform the following operations to add tags to a cluster when creating the cluster.

NOTE:

You can also add tags to an existing cluster. For details, see Managing Tags.

  1. Log in to the management console.
  2. Click Create Cluster to go to the cluster creation page.
  3. In Advanced Settings, select Configure now.

    Enter the key and value of a tag to be added.

    You can add a maximum of 10 tags to a cluster and use intersections of tags to search for the target cluster.

    Figure 1 Adding tags

Searching for the Target Cluster

On the Active Cluster page, search for the target cluster by tag key or tag value.

  1. Log in to the management console.
  2. In the upper right corner of the Active Cluster page, click Search by Tag to access the search page.
    Figure 2 Searching by tag
  3. Enter the tag of the cluster to be searched.

    You can select a tag key or tag value from their drop-down lists. When the tag key or tag value is exactly matched, the system can automatically locate the target cluster. If you enter multiple tags, their intersections are used to search for the cluster.

  4. Click Search.

    The system searches for the target cluster by tag key or value.

Managing Tags

You can view, add, modify, and delete tags on the Tag tab page of the cluster.

  1. Log in to the management console.
  2. On the Active Cluster page, click the name of a cluster for which you want to manage tags.

    The cluster details page is displayed.

  3. Click the Tags tab and view, add, modify, and delete tags on the tab page.
    Figure 3 Tag tab
    • View

      On the Tags tab page, you can view details about tags of the cluster, including the number of tags and the key and value of each tag.

    • Add

      Click Add Tag in the upper left corner. In the displayed Add Tag dialog box, enter the key and value of the tag to be added, and click OK.

    • Modify

      In the Operation column of the tag, click Edit. In the displayed Edit Tag page, enter new tag value and click OK.

    • Delete

      In the Operation column of the tag, click Delete. After confirmation, click OK in the displayed Delete Tag page.

      NOTE:

      MRS cluster tag updates will be synchronized to every ECS in the cluster. You are advised not to modify ECS tags on the ECS console to prevent inconsistency between ECS tags and MRS cluster tags. If the number of tags of an ECS in the MRS cluster reaches the upper limit, you cannot create any tag for the MRS cluster.