Configure Traffic Split Verification

Updated 1 week ago by Chakravarthy Tenneti

You can configure verification using the traffic split mechanism during the Workflow definition phase. 

Currently, this feature is only supported for SpotInst Blue/Green Deployment.

In this topic:

Before You Begin

Step 1: Add the Workflow with Traffic Shift Strategy

Create the Blue/Green Workflow

  1. In the Harness Application containing the Service and Infrastructure Definition you want to use, click Workflows.
  2. Click Add Workflow.
  3. Enter a name for the Workflow.
  4. In Workflow Type, select Blue/Green Deployment.
  5. Select an Environment and Service, and the Infrastructure Definition containing your imported Elastigroup JSON Configuration.
  6. In Traffic Shift Strategy, select Incrementally Shift Traffic using ELB.
  7. Click Submit.

Harness creates the Workflow and automatically adds the steps for deployment.

By default, only one Shift Traffic Weight step is added. Unless you want to shift the traffic in one step, you will likely add more Shift Traffic Weight steps to incrementally shift traffic.

For more information about Blue/Green Deployment and Workflow creation, see Blue/Green Deployment with Incremental Traffic Shift.

Step 2: Add Traffic Split Step

  1. Add the required steps in sections for deployment and staging verification.
  2. Add traffic shift steps in the Route Update section after the Verify Staging section based on the percentage shift required.

You can manipulate traffic shifting using as many Shift Traffic Weight steps as you like.

Typically, you add Approval steps between each Shift Traffic Weight step to ensure that everything is running smoothly. For example, you can test the new feature(s) of your app before approving. This is a simple way to incorporate A/B testing into your Workflow.

Approval steps are very useful because they enable you to cancel a deployment and return to the pre-deployment traffic weighting with a single step.

Step 3: Add Verification Step

In the Route Update section, after each traffic split step, you can add the verification step for one of the following:

Make sure you add the verification steps for traffic split only in the Route Update section.

The configure AppDynamics/ELK procedure is similar to the regular configuration, except for the Baseline for Risk Analysis input. You can select only Canary Analysis.

Traffic split analysis will be performed only if the new traffic percentage is less than 50%. Analysis will not be performed if the traffic split is more than 50%.

Step 4: View Verification Results

Once you have executed the Workflow, Harness performs the verification you configured and displays the results in the Deployments and Continuous Verification pages. Verification is executed in real time, quantifying the business impact of every production deployment.

For a quick overview of the verification UI elements, see Continuous Verification Tools. For details about viewing and interpreting verification results, see Verification Results Overview.


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