Check and manage information of Cloud Hadoop

Available in VPC

You can create a new Cloud Hadoop cluster through the NAVER Cloud Platform console, and then check the details of the created cluster.
You can also change the number of cluster nodes and upgrade the specifications of the nodes.

Check cluster details

To check the details of a cluster:

1. In the VPC environment of the NAVER Cloud Platform console, navigate to > Services > Big Data & Analytics > Cloud Hadoop in order.
2. Click the cluster account to be checked.
   • The cluster details are displayed.

The following describes each item on the cluster list interface.

Area	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 bar	Set the search conditions and click button 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 the cluster:

1. In the VPC environment of the NAVER Cloud Platform console, navigate to > Services > Big Data & Analytics > Cloud Hadoop in order.
2. Select the cluster where you want to change the number of worker nodes in the cluster list, and then click the [Manage cluster] button.
3. Click Change number of nodes.
4. Enter the number of worker nodes to be changed, and then click the [Yes] button.
   • 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 detailed information becomes Configuring, and then gets displayed again as Running once the task is completed.

Change specifications of cluster nodes

You can upgrade the current specifications of the Cloud Hadoop cluster nodes. It is only possible to upgrade specifications higher than the current specifications, and additional fees will be charged for upgrading.

To change the specifications of cluster nodes:

1. In the VPC environment of the NAVER Cloud Platform console, navigate to > Services > Big Data & Analytics > Cloud Hadoop in order.
2. Select the cluster where you want to change the specifications of nodes in the cluster list, and then click the [Manage cluster] button.
3. Click Change node specifications.
4. Change the specifications by node and click the [Yes] button.
5. Click the [Yes] button on the confirmation popup window.

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. In the VPC environment of the NAVER Cloud Platform console, navigate to > Services > Big Data & Analytics > Cloud Hadoop in order.
2. Select the cluster where you want to reset the cluster admin password in the cluster list, and then click the [Manage cluster] button.
3. Click Initialize cluster admin password.
4. Enter the new password and the confirmation password on the Change popup window and then click the [Yes] button.

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. In the VPC environment of the NAVER Cloud Platform console, navigate to > Services > Big Data & Analytics > Cloud Hadoop in order.
2. Select the cluster where you want to back up cluster settings in the cluster list, and then click the [Manage cluster] button.
3. Click Back up cluster settings.
4. Check the details related to backup on the Confirmation popup window and click the [OK] button.
5. Click the [OK] button on the Download completion confirmation popup window.

Integrate external Hive metastores

You can connect the Cloud Hadoop Hive metastore to the Cloud DB for MySQL database created in a user account. For more information, see the Integrate Cloud DB for MySQL with external Hive metastore guide.

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. In the VPC environment of the NAVER Cloud Platform console, navigate to > Services > Big Data & Analytics > Cloud Hadoop in order.

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

3. Click Change authentication key for direct cluster access.

4. Enter the user account password on the User verification popup window and then click the [OK] button.

5. Click the [Send verification email] button on the User authentication popup window.

   • 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 on the User authentication popup window and then click the [OK] button.

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

   • To create a new authentication key, select Create new authentication key, enter the authentication key name, and click the [Create and save authentication key] button.
   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 the [OK] button on the Change completion confirmation popup window.

Manage authentication key

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

To check and delete the authentication key:

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

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. In the VPC environment of the NAVER Cloud Platform console, navigate to > Services > Big Data & Analytics > Cloud Hadoop in order.
2. Select the cluster to access the Web UI from the cluster list, and then click the [View by Application] button.
3. Check the Web UI that can be accessed and the access rules on the popup window.
   • 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] button.
   • Select Don't show this again on the popup window and then click the [OK] button.
   • When you click [View by Application], the Application Web UI list is displayed.
   • The Application Web UI list may vary depending on the cluster version you created.