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Node filtering

The node filtering feature allows you to select specific nodes within your Kubernetes environment using the PodName label. This allows for focused analysis, enabling you to choose specific nodes as service instances for in-depth analysis.

Harness CV autonomously identifies new nodes as they are added to the cluster. However, the node filtering feature allows you to focus the analysis explicitly on the nodes that you want to analyze. Imagine you have a Kubernetes cluster with multiple nodes, and you want to analyze the performance of pods running on specific nodes. You want to analyze the nodes that match a certain naming pattern.

note

Currently, this feature is behind the feature flag CV_UI_DISPLAY_NODE_REGEX_FILTER. Contact Harness Support to enable the feature.

Before you begin​

You will need to know how to add and configure a verify step.

Add filtering​

  1. On the Verify settings page, expand Optional to navigate to the node filtering settings section.

  2. (Optional) Select Use node details from CD if you want Harness CV to collect and analyze the metrics and log details for the recently deployed nodes.

  3. Specify the Control Nodes and Test Nodes:

    • Control Nodes: These are the nodes against which the test nodes are compared. You can specify the control nodes to provide a baseline for analysis.

    • Test Nodes: These are the nodes that Harness CV evaluates and compares against the control nodes.

    To specify the Control Nodes and Test Nodes, in one of the following ways:

    • Type node names: Enter the names of specific nodes you want to include in the analysis.

    • Use simple patterns (Regex): Define a regular expression pattern to match the nodes you want to filter. For example, if your nodes follow a naming convention such as "node-app-1", "node-app-2", and so on, you could use a pattern such as "node-app-*" to include all nodes with names starting with "node-app-".

    Example: Let's say you want Harness CV to analyze the only nodes that have "backend" in their PodName label:

    1. In the Control Nodes field, enter "backend-control-node" as the control node.

    2. In the Test Nodes field, enter the pattern "backend-*" to include all nodes with names starting with "backend-".