Скачать или смотреть Resolving SSH Errors After Upgrading to Databricks Premium: A Step-By-Step Guide

Facing `issues with SSH` after upgrading to Databricks Premium? Discover how to fix cluster starting problems due to VNet misconfigurations with our comprehensive guide.
---
This video is based on the question https://stackoverflow.com/q/63123770/ asked by the user 'ash_huddles' ( https://stackoverflow.com/u/9767791/ ) and on the answer https://stackoverflow.com/a/63125116/ provided by the user 'ash_huddles' ( https://stackoverflow.com/u/9767791/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Unable to start cluster after upgrading th Databricks premium - ssh error

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Resolving SSH Errors After Upgrading to Databricks Premium: A Step-By-Step Guide

When upgrading your Databricks workspace to the Premium tier, you may encounter issues starting your cluster. A common error during this transition is the inability to connect to cluster instances via SSH, often indicating a network configuration problem. In this post, we will explore the typical causes of this issue, and how you can resolve it to get your cluster up and running seamlessly.

Understanding the Problem

After upgrading to a Premium tier, users may find themselves facing the following error message:

[[See Video to Reveal this Text or Code Snippet]]

Given that your workspace is deployed on a private Virtual Network (VNet) and isolated from an on-premises network, the root cause of this error is often linked to the configuration of the network settings.

Common Causes of SSH Errors

Network Configuration Issues: When a workspace is upgraded, existing network security groups (NSGs) and subnet configurations may restrict access.

Old Network Security Groups (NSGs): During the upgrade, if the existing NSGs are not properly adjusted or disconnected from the subnets, access issues can occur.

Step-by-Step Solution: Fixing the Issue

To solve the SSH error and successfully start your cluster, follow these steps:

Step 1: Review Your Network Configurations

Access your Azure portal.

Navigate to the section where your VNets and subnets are configured.

Confirm that the correct subnets are linked to the Databricks cluster.

Step 2: Inspect Network Security Groups (NSGs)

Find the Old NSGs:

Check for any formerly used NSGs that may still be associated with the subnets.

Disconnect Old NSGs:

Select the subnet that is integral to your Databricks cluster.

Disconnect any outdated NSGs. This is critical because old security policies can prevent SSH connectivity.

Step 3: Validate and Test

After making adjustments:

Save your configurations and attempt to start your cluster again.

If the cluster starts successfully, then the issue with SSH should be resolved.

Conclusion

Upgrading to Databricks Premium can enhance your workspace's capabilities, but it may also introduce new challenges in managing network configurations. By following the steps outlined in this guide, you should be able to troubleshoot and fix SSH errors, ensuring that your clusters start without any issues.

If you continue to experience problems after these adjustments, it may be beneficial to review your overall network architecture or reach out to Databricks support for further assistance.

By staying on top of your network configurations, you can make the most of the benefits that come with upgrading to Databricks Premium without the hassle of connectivity issues.