UI access and password settings by service

Available in VPC

You can manage Cloud Hadoop cluster's information and status using the web UIs provided by NAVER Cloud Platform's Cloud Hadoop (such as Ambari and Hue).

Preliminary task

In order to access a cluster node, the following preparations need to be made in advance:

1. Set SSL VPN

SSL VPN must be set to ensure secure access from outside to the network configured within NAVER Cloud Platform.
For detailed information for SSL VPN setting, see Set SSL VPN.

2. Set ACG rules

To change the ACG rules of a cluster:

1. In the VPC environment on the NAVER Cloud Platform console, navigate to > Services > Compute > Server > ACG.
2. Select the ACG of the cluster you want to access and click [ACG settings].
   
3. Enter the following 4 information items and add ACG Rule:
   • Protocol: TCP
   • Access source: IP of the local device that communicates with SSH
   • Allowed port: 8443 for Ambari, and 8421 for HDFS NameNode
   • Note (optional)
     

Access Web UI

You can access each web UI using DNS.

To access the available web UIs:

1. In the VPC environment on the NAVER Cloud Platform console, 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. Click the web UI link in the note field from the popup window's web UI list.
4. Go to the NCloud login authentication page and access the web UI with NCloud account login.
   

Access through private IP

Access can be made using the private IP of each node with SSL VPN turned on. Click the Quick Links from each Ambari UI menu and FQDN will be used instead of the host's private IP. Replace FQDN with private IP and access.

Change password

Ambari

To set and change the Ambari UI access password, click [Manage cluster] > Initialize cluster admin password on the Cloud Hadoop console.
For more information, see Initialize cluster admin password.

Hue

To change the password for accessing the HUE UI:

1. Run PuTTY and access the edge node through SSH. For more information, see the Access cluster node through SSH guide.

2. Run the following commands to change the password:

   $ pwd
   /usr/hdp/3.1.0.0-78/hue/build/env/bin  # Cloud Hadoop 1.x
   /usr/nch/3.1.0.0-78/hue/build/env/bin  # Cloud Hadoop 2.x
   
   $ sudo -s
   
   $ cd /usr/nch/3.1.0.0-78/hue/build/env/bin
   
   $ echo "from django.contrib.auth.models import User; 
   u = User.objects.get(username='existing user name');
   u.set_password('new password');
   u.save()
   " |  ./hue  shell
   

   Or, change the password using the hue changepassword command as follows:

   $ cd /usr/nch/3.1.0.0-78/hue/build/env/bin 
   
   $ sudo ./hue changepassword 'existing user name'
   Changing password for user 'existing user name'
   Password:
   Password (again):
   Password changed successfully for user 'existing user name'
   

Zeppelin Notebook

In Cloud Hadoop, Zeppelin Notebooks are managed by Ambari.
Therefore, it is recommended to access the Ambari UI and perform tasks rather than directly accessing the cluster to change files and run scripts.

To change your Zeppelin Notebook password:

1. After accessing the Ambari UI, log in with the cluster admin account ID and password.
2. Click Zeppelin Notebook from the left-side bar.
3. Click the [CONFIGS] tap at the top.
4. Click the Advanced-zeppelin-shiro-ini item, and edit the password.
   
5. Click [Save] at the bottom right corner.
6. Click [Actions] > Restart All at the upper right, and click [Confirm Restart All] in the popup window.

If you follow the above sequence and access Zeppelin Notebook, you will see that the password change has been applied.