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logoTetrate Service BridgeVersion: 1.9.x

Traffic Shifting

Before you get started, make sure you:
✓ Familiarize yourself with TSB concepts
✓ Install the TSB demo environment
✓ Deploy the Istio Bookinfo sample app
✓ Create a Tenant
✓ Create a Workspace
✓ Create Config Groups
✓ Configure Permissions
✓ Setup an Ingress Gateway
✓ Checking service topology and metrics

In this scenario, you will use a Service Route to shift traffic from the reviews v1 to reviews v2 service.

If you open https://bookinfo.tetrate.com/productpage, and refresh the page several times, you will see reviews changes between v1 (no ratings), v2 (black star ratings) and v3 (red star ratings).

In the following scenario, you will start with using reviews v1, then partially shift traffic from v1 to v2, and finally use v2 only.

Serve v1 only​

Using the UI​

  • Under Tenant on the left panel, select Workspaces.
  • On the bookinfo-ws Workspace card, click on Traffic Groups.
  • Click on the bookinfo-traffic Traffic Group you created previously.
  • Select the Traffic Settings tab.

Now, you are going to add a new Service Route

  1. Under Traffic Settings, Click on Service Routes.
  2. Click Add new.... This will create a new Service Route with default name default-serviceroute.
  3. Click default-serviceroute to open its configuration form, and rename to bookinfo-traffic-reviews.
  4. Set Service to bookinfo/reviews.bookinfo.svc.cluster.local.
  5. Expand default-serviceroute
  6. Expand Subsets
  7. Click Add new Subset.... This will create a new Subset called subset-0.
  8. Click on subset-0.
    • Set name to v1.
    • Set the weight to 100. The weight is the percentage of traffic to be sent to this subset.
    • Click on Add Label, and set Label to version and Value to v1.
  9. Save Changes.

Using tctl​

Create the following reviews.yaml

apiVersion: traffic.tsb.tetrate.io/v2
kind: ServiceRoute
Metadata:
  organization: tetrate
  name: bookinfo-traffic-reviews
  group: bookinfo-traffic
  workspace: bookinfo-ws
  tenant: tetrate
spec:
  service: bookinfo/reviews.bookinfo.svc.cluster.local
  subsets:
    - name: v1
      labels:
        version: v1
      weight: 100

Apply with tctl

tctl apply -f reviews.yaml

Verify result​

Now, open https://bookinfo.tetrate.com/productpage. Refresh the page several times. You will see reviews only shows v1 version (no stars).

Split traffic between v1 and v2​

Using the UI​

Now, split traffic evenly between v1 and v2 by updating the bookinfo-traffic-reviews Service Route.

  1. Select the v1 subset of your Service Route again.
  2. Enter 50 as Weight.
  3. Just below v1, click on Add new Subset.... This will create a new Subset called subset-1.
  4. Click on subset-1.
    • Set name to v2.
    • Enter 50 as Weight.
    • Click on Add Label, and set Label to version and Value to v2.
  5. Save Changes.

Using tctl​

Now, split traffic evenly between v1 and v2 by updating reviews.yaml or download it from reviews-update1.yaml

apiVersion: traffic.tsb.tetrate.io/v2
kind: ServiceRoute
Metadata:
  organization: tetrate
  name: bookinfo-traffic-reviews
  group: bookinfo-traffic
  workspace: bookinfo-ws
  tenant: tetrate
spec:
  service: bookinfo/reviews.bookinfo.svc.cluster.local
  subsets:
    - name: v1
      labels:
        version: v1
      weight: 50
    - name: v2
      labels:
        version: v2
      weight: 50

Re-apply with tctl

tctl apply -f reviews.yaml

Verify result​

Go to https://bookinfo.tetrate.com/productpage again. Refresh the page several times. You will see reviews switch between v1 (no ratings) and v2 (black star ratings) versions.

Serve v2 only​

Using the UI​

Finally, route 100% traffic to the v2 by updating the bookinfo-traffic-reviews Service Route.

  1. Select the v1 subset of your Service Route.
  2. Click Delete v1.
  3. Select the v2 subset of your Service Route.
  4. Set the Weight to 100.
  5. Save Changes.

Using tctl​

Finally, route 100% traffic to the v2 version by updating reviews.yaml or download it from reviews-update2.yaml

apiVersion: traffic.tsb.tetrate.io/v2
kind: ServiceRoute
Metadata:
  organization: tetrate
  name: bookinfo-traffic-reviews
  group: bookinfo-traffic
  workspace: bookinfo-ws
  tenant: tetrate
spec:
  service: bookinfo/reviews.bookinfo.svc.cluster.local
  subsets:
    - name: v2
      labels:
        version: v2

Re-apply again with tctl

tctl apply -f reviews.yaml

Verify result​

Go to https://bookinfo.tetrate.com/productpage again. Refresh the page several times. You will see reviews only showing the v2 version (black star ratings).