Viewing and managing Cloud Hadoop information
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Viewing and managing Cloud Hadoop information

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The NAVER Cloud Platform console's Cloud Hadoop menu is where you can create and manage Cloud Hadoop clusters.
Under this menu, you can create new clusters and check the details of created clusters such as name, specifications, status, and IP. Or, you can change the number of cluster nodes or change settings such as public IP required for access.

View cluster details

The following describes how to view the cluster details.

  1. From the NAVER Cloud Platform console, click the Services > Big Data & Analytics > Cloud Hadoop menus, in that order.
  2. Click the cluster item you want to check.
    • The cluster details are displayed.

The following are the descriptions for each item of the cluster list page.

cloudhadoop-clusterlist_en

Area Description
Create cluster Create new cluster
Delete Delete the selected cluster
Manage cluster Use the Manage cluster menu
Manage server access Use the Manage server access menu
View by application Refer to the accessible management web UI list (UI access and password settings by service)
⑥ Search window Sets search conditions, and then click the cloudhadoop_search_en button to search for items
⑦ Cluster item View the cluster's basic information
⑧ Details View detailed information of the selected cluster

Manage cluster

Change the number of cluster worker nodes

If the Cloud Hadoop cluster doesn't have sufficient resources or has too much compared to the worker nodes to run, then you can adjust (scale in/out) the number of worker nodes.

The following describes how to change the number of worker nodes in a cluster.

  1. From the NAVER Cloud Platform console, click the Services > Big Data & Analytics > Cloud Hadoop menus, in that order.

  2. Select the cluster to change the number of worker nodes from the cluster list, and then click the [Manage cluster] button.

  3. Click Change number of nodes.

  4. Enter the number of worker nodes you want, and then click the [Yes] button.

    • The minimum (default) number of worker nodes is 2, and you can change to up to 10 at each job. If you need to add 10 or more worker nodes, then repeat the process of changing the number of nodes.

    cloudhadoop-clusterlist_nodechange_en

Once the task of changing the number of nodes starts, the status item in the cluster list or details becomes Setting, and then displays again as Running once the task is completed.

cloudhadoop-clusterlist_status_en

Note

You can also view the number of worker nodes in Ambari UI's Host page. Please refer to Using Ambari UI for more information about the Ambari UI.

chadoop-3-5-03_en.png

Initialize cluster admin password

You can reset the password of the Ambari UI user account that was set during cluster installation.

Note

The HUE and Zeppelin passwords must be changed by accessing the node directly. For more details, refer to UI access and password settings by service.

The following describes how to reset the cluster admin password.

  1. From the NAVER Cloud Platform console, click the Services > Big Data & Analytics > Cloud Hadoop menus, in that order.
  2. Select the cluster you want to reset the cluster admin password for in the cluster list, and then click the [Manage cluster] button.
  3. Click Initialize cluster admin password.
  4. Enter the new password and confirmation password in the change pop-up window, and then click the [Yes] button.

Backup cluster settings

You can back up client configurations for the services installed on the cluster. This is useful when you want to backup the configuration after changing it, or when configuring client environment on another server.

The following shows how to back up cluster settings.

  1. From the NAVER Cloud Platform console, click the Services > Big Data & Analytics > Cloud Hadoop menus, in that order.
  2. Select the cluster to back up the settings from the cluster list, and then click the [Manage cluster] button.
  3. Click Back up cluster settings.
  4. Check the backup details in the confirmation pop-up window, and then click the [Yes] button.
  5. From the download completion confirmation pop-up window, click the [Yes] button.
  • The backed up data will be saved under the Object Storage bucket connected to the cluster.

Manage server access

Change authentication key for direct cluster access

You can change the key file (.pem) for SSH connection to the cluster node (server).

The following describes how to change the authentication key for direct cluster access.

  1. From the NAVER Cloud Platform console, click the Services > Big Data & Analytics > Cloud Hadoop menus, in that order.

  2. Select the cluster to change the authentication key for direct cluster access from 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 in the user confirmation pop-up window, and then click the [Yes] button.

  5. Click the [Send authentication email] button in the user identification pop-up window.

    • The email for identification is sent to the email address registered.
  6. Enter the authentication message in the authentication email received in the authentication message field in the user identification pop-up window, and then click the [Yes] button.

  7. Select an authentication key that you have or create a new authentication key from the changing authentication key pop-up window, and then click the [Change] button.

    • To create a new authentication key, select Create new authentication key, enter the authentication key name, and then click the [Create and save authentication key] button.
    Note

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

  8. From the change confirmation pop-up window, click the [Yes] button.

Change public IP settings

You can remove public IPs assigned to cluster nodes.

The following describes how to remove a public IP assigned to a cluster node.

  1. From the NAVER Cloud Platform console, click the Services > Big Data & Analytics > Cloud Hadoop menus, in that order.
  2. Select the cluster to change the authentication key for direct cluster access from the cluster list, and then click the [Manage server access] button.
  3. Click Change public IP settings.
  4. Check the details in the confirmation pop-up window, and then click the [Yes] button.
Note

Removing the public IP will block the Ambari web UI access, and direct cluster access via SSH will be restricted.

Manage authentication key

You can check the authentication keys owned by the user and delete authentication keys that are not in use.

The following describes how to view and delete authentication keys.

  1. From the NAVER Cloud Platform console, click the Services > Big Data & Analytics > Cloud Hadoop menus, in that order.
  2. Select the cluster to change the authentication key for direct cluster access from the cluster list, and then click the [Manage server access] button.
  3. Click Manage authentication key.
  4. View the authentication keys you own currently in the manage authentication key pop-up window.
    • To delete authentication keys that are not in use, click the [Delete] button of the authentication key, and then click the [OK] button.

View by application

You can view the accessible web UIs and access rules, and then click the shortcut link to access the web UI.

  1. From the NAVER Cloud Platform console, click the Services > Big Data & Analytics > Cloud Hadoop menus, in that order.
  2. View the list of accessible web UIs from the cluster list, or select the cluster to access, and then click the [View by application] button.
  3. View the accessible web UIs and access rules in the pop-up window.
    • Click the link in Remarks to go to the web UI. However, in order to access a web UI, the cluster's ACG must have access rules by web UI set up in advance. You can modify ACG by clicking cloudhadoop-edit_ko of ACG under the cluster's details, and then going to the ACG menu. Please refer to Set firewall (ACG) for more information about ACG.
  4. Click the [OK] button.
    • If you click the [OK] button after selecting Do not show again from the pop-up window, then the accessible web UI list will be displayed as below if you click [View by application] moving forward.

      cloudhadoop-clusterlist_applist_en

Note

For more details about web UI access, refer to UI access by service.


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