Check and manage Cloud Hadoop information

Available in Classic

You can create and manage Cloud Hadoop clusters in the Cloud Hadoop menu on the NAVER Cloud Platform management console.
This menu allows you to create new clusters and check the details of created clusters, including name, specifications, status, and IP address. You can also change the number of nodes in the cluster or configure settings like the public IP address required for access.

Check cluster details

To check the details of a cluster:

1. From the NAVER Cloud Platform console's Classic environment, navigate to > Services > Big Data & Analytics > Cloud Hadoop.
2. Click on the cluster item you want to check.
   • The cluster details are displayed.

The following describes each item on the cluster list interface:

Component	Description
① Create cluster	Creates a new cluster
② Delete	Deletes the selected cluster
③ Manage cluster	Uses the Manage cluster menu
④ Manage server access	Uses the Manage server access menu
⑤ View by application	Management Web UI list that can be accessed (see UI access and password settings by service)
⑥ Search window	Set the search conditions and click to run the search
⑦ Cluster item	Views the cluster's basic information
⑧ Details	Views detailed information on the selected cluster

Manage cluster

Change the number of cluster worker nodes

If the worker nodes you want to run are less or more than the resources of the Cloud Hadoop cluster, you can scale out or in the number of worker nodes.

To change the number of worker nodes in a cluster:

1. From the NAVER Cloud Platform console's Classic environment, navigate to > Services > Big Data & Analytics > Cloud Hadoop.
2. Select the cluster where you want to change the number of worker nodes in the cluster list, and then click Manage cluster.
3. Click Change number of nodes.
4. Enter the number of worker nodes to be changed, and then click [Yes].
   • The minimum number of worker nodes is 2 (default), and you can change up to 10 worker nodes for every task. To add more than 10 worker nodes, repeat the task of changing the number of nodes.
     

Once the task of changing the number of nodes starts, the Status field in the cluster list or details becomes Configuring, and then gets displayed again as Running once the task is completed.

Initialize cluster admin password

You can reset the Ambari UI user account password you set when installing the cluster.

To reset the cluster admin password:

1. From the NAVER Cloud Platform console's Classic environment, navigate to > Services > Big Data & Analytics > Cloud Hadoop.
2. Select the cluster where you want to reset the cluster admin password in the cluster list, and then click Manage cluster.
3. Click Initialize cluster admin password.
4. Enter the new password and the confirmation password in the Change popup, and then click [Yes].

Back up cluster settings

You can back up the client configuration for the services installed in the cluster. This task is useful when you back up the configuration after changing it, or build a client environment on a different server.

To back up the cluster settings:

1. From the NAVER Cloud Platform console's Classic environment, navigate to > Services > Big Data & Analytics > Cloud Hadoop.
2. Select the cluster where you want to back up cluster settings in the cluster list, and then click Manage cluster.
3. Click Back up cluster settings.
4. Check the details related to backup in the Confirmation popup and click [Yes].
5. Click [OK] in the Download completion confirmation popup.

Manage server access

Change authentication key for direct cluster access

You can change the key file (.pem) to access the cluster node (server) through SSH.

To change the authentication key for direct cluster access:

1. From the NAVER Cloud Platform console's Classic environment, navigate to > Services > Big Data & Analytics > Cloud Hadoop.

2. Select the cluster to change the authentication key for direct cluster access in the cluster list, and then click [Manage server access].

3. Click Change authentication key for direct cluster access.

4. Enter the user account password in the User verification popup, and then click [Yes].

5. Click [Send verification email] in the User authentication popup.

   • An identity verification email is sent to your registered email address.

6. Enter the authentication message contained in the authentication email received in the authentication message input field in the User authentication popup, and then click [Yes].

7. Select an authentication key you have or create a new authentication key in the Change authentication key popup, and then click [Change].

   • To generate a new authentication key, select Generate new authentication key, enter an authentication key name, and click [Generate and save authentication key].
   Note

   The authentication key is required to verify the admin password. Keep the saved .pem file in a safe location on your PC.

8. Click [Yes] in the Change completion confirmation popup.

Change public IP settings

You can remove a public IP address assigned to a cluster node.

To remove a public IP address assigned to a cluster node:

1. From the NAVER Cloud Platform console's Classic environment, navigate to > Services > Big Data & Analytics > Cloud Hadoop.
2. Select the cluster whose public IP address you want to remove in the cluster list, and then click [Manage server access].
3. Click Change public IP settings.
4. Check the details on the Confirmation popup, and then click [Yes].

Manage authentication key

You can check the authentication keys you have and delete unused authentication keys.

To check and delete an authentication key:

1. From the NAVER Cloud Platform console's Classic environment, navigate to > Services > Big Data & Analytics > Cloud Hadoop.
2. Select the cluster to change the authentication key for direct cluster access in the cluster list, and then click [Manage server access].
3. Click Manage authentication key.
4. Check the authentication keys you currently have in the Manage authentication key popup.
   • To delete unused authentication keys, click the [Delete] of the corresponding authentication key, and then click [OK].

View by application

You can check the Web UI that can be accessed and the access rules, and then click the shortcut link to access the corresponding Web UI.

1. From the NAVER Cloud Platform console's Classic environment, navigate to > Services > Big Data & Analytics > Cloud Hadoop.
2. Select the cluster to access the Web UI from the cluster list, and then click [View by application].
3. Check the Web UI that can be accessed and the access rules in the popup.
   • Click the link in the Note field to go to the corresponding Web UI. However, to access Web UI, you need to set access rules by Web UI in the ACG of the corresponding cluster first. Press of ACG in the details of the cluster, and then you can change ACG in the ACG menu. For more information on ACG, see Set firewall (ACG).
4. Click [OK].
   • After selecting Do not show again in the popup and clicking [OK], click [View by application] and the list of connected Web UI will be displayed as shown below.
   • The Application Web UI list will vary depending on the cluster version and cluster type created by the user.