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Configure the Verify Step

Harness Continuous Verification (CV) integrates with various health sources to:

  • Verify that the deployed service is running safely.
  • Perform automatic rollbacks.
  • Apply machine learning to every deployment to identify and flag anomalies in future deployments.

This topic covers how to add and configure health sources for the verify step.

Review: CV setup options​

To use the verify step, you will need a Harness Monitored Service. In the simplest terms, a monitored service is basically a mapping of a Harness Service to a service monitored by your APM or logging tool.

You can set up a Monitored Service in the Verify step in a CD stage.

There are other ways to set up a Monitored Service. To learn more, go to Monitored Service

In this topic we'll set up the Monitored Service as part of the Verify step.

Step 1: Add verify step​

There are two ways to add the verify step:

  1. When selecting the stage deployment strategy:
    • The Verify step can be enabled in a CD stage the first time you open the Execution settings and select the deployment strategy.
    • When you select the deployment strategy you want to use, there is also an Enable Verification option. Select it.
    • Harness will automatically add the Verify step. For example, here is a stage where Canary strategy and the Enable Verification option were selected

  1. Add the Verify step to an existing Execution setup: 
    • You can also add the Verify step to the Execution section of a CD stage in a Pipeline you previously created.
    • Simply click Add Step after the deployment step, and then select Verify.

Step 2: Enter a name and timeout​

In Name, enter a name for the step.

In Timeout, enter a timeout value for the step.

You can use:

  • w for weeks
  • d for days
  • h for hours
  • m for minutes
  • s for seconds
  • ms for milliseconds

The maximum is 53w. Timeouts can be set at the Pipeline level also.

Step 3: Select a Continuous Verification Type​

In Continuous Verification Type, select a type that matches your deployment strategy

Step 4: Create a Monitored Service​

In Monitored Service, click Click to autocreate a monitored service.

Harness automatically creates a monitored service using a concatenation of the service and environment names. For example, a service named todolist and an environment named dev results in a monitored service with the name todolist_dev.

note

The option to auto-create a monitored service is not available if you have configured either a service, an environment, or both as runtime values. When you run the pipeline, Harness concatenates the service and environment values you enter in the runtime inputs screen and generates a monitored service name. If a monitored service with the same name exists, Harness assigns it to the pipeline. If no monitored service that matches the generated monitored service name exists, Harness skips the verification step.

For example, suppose you enter the service as todolist and the environment as dev. In that case, Harness generates the monitored service name todolist_dev, checks whether a monitored service with the name todolist_dev is available, and assigns it to the pipeline. If no monitored service is available with the name todolist_dev, Harness skips the verification step.

Step 5: Add Health Sources​

Harness supports a wide variety of health sources. For a full list, and instructions how to set up each one, go to health sources.

Step 6: Select Sensitivity​

In Sensitivity, select High, Medium, or Low based on the risk level used as failure criteria during the deployment.

Step 7: Select Duration​

Select how long you want Harness to analyze and monitor the logs/APM data points. Harness waits for 2-3 minutes to allow enough time for the data to be sent to the APM/logging tool before it analyzes the data. This wait time is a standard with monitoring tools.

The recommended Duration is 10 min for logging providers and 15 min for APM and infrastructure providers.

Step 8: Specify Artifact Tag​

In Artifact Tag, use a Harness expression.

The expression <+serviceConfig.artifacts.primary.tag> refers to the primary artifact.

Option: Advanced Settings​

In Advanced, you can select the following options:

Step 9: Deploy and Review Results​

After setting up the Verify step, click Apply Changes.

Click Run to run the pipeline.

In Run Pipeline, select the tag for the artifact if a tag was not added in the Artifact Details settings.

Click Run Pipeline.

When the Pipeline is running, click the Verify step.

You can see that the verification takes a few minutes.

Once verification is complete, the Verify step shows the following:

The risk level might initially display a number of violations, but the red and orange colored host often change to green over the duration.

Summary​

The Summary section shows the number of logs that are in violation.

Console View​

Click Console View or simply click View Details in Summary to take a deeper look at verification.

You can use the search option to search for any specific metric or transaction you want.

Set a pinned baseline​

note

Currently, this feature is behind the feature flag SRM_ENABLE_BASELINE_BASED_VERIFICATION. Contact Contact Harness support to enable the feature.

You can set specific verification in a successful pipeline execution as a baseline. This is available with Load Testing as the verification type.

Set successful verification as a baseline​

To set a verification as baseline for future verifications:

  1. In Harness, go to Deployments, select Pipelines, and find the pipeline you want to use as the baseline.

  2. Select the successful pipeline execution with the verification that you want to use as the baseline.

    The pipeline execution is displayed.

  3. On the pipeline execution, navigate to the Verify section, and then select Pin baseline.

    The selected verification is now set as the baseline for future verifications.

Replace an existing pinned baseline​

To use a new baseline from a pipeline and replace the existing pinned baseline, follow these steps:

  1. In Harness, go to Deployments, select Pipelines, and find the pipeline from which you want to remove the baseline.

  2. Select the successful pipeline execution with the verification that you have previously pinned as the baseline.

  3. On the pipeline execution, navigate to the Verify section, and then select Pin baseline.

    A confirmation alert message appears, asking if you want to replace the existing pinned baseline with the current verification. After you confirm, the existing pinned baseline gets replaced with the current verification.