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Quick Start with Google Kubernetes Engine How to quickly setup Istio using Google Kubernetes Engine (GKE). 20
kubernetes
gke
google

Quick Start instructions to install and run Istio in Google Kubernetes Engine (GKE) using Google Cloud Deployment Manager.

This Quick Start creates a new GKE zonal cluster, installs the current release version of Istio and then deploys the Bookinfo sample application. It uses Deployment Manager to automate the steps detailed in the Istio on Kubernetes setup instructions for Kubernetes Engine

Prerequisites

  • This sample requires a valid Google Cloud Platform project with billing enabled. If you are not an existing GCP user, you may be able to enroll for a $300 US Free Trial credit.

  • Ensure that the Google Kubernetes Engine API is enabled for your project (also found by navigating to "APIs & Services" -> "Dashboard" in the navigation bar). If you do not see "API enabled", then you may enable the API by clicking the "Enable this API" button.

  • You must install and configure the gcloud command line tool and include the kubectl component (gcloud components install kubectl). If you don't want to install the gcloud client on your own machine, you can use gcloud via Google Cloud Shell to perform the same tasks.

  • {{< warning_icon >}} You must set your default compute service account to include:

    • roles/container.admin (Kubernetes Engine Admin)
    • Editor (on by default)

To set this up, navigate to the IAM section of the Cloud Console as shown below and find your default GCE/GKE service account in the following form: projectNumber-compute@developer.gserviceaccount.com: by default it should just have the Editor role. Then in the Roles drop-down list for that account, find the Kubernetes Engine group and select the role Kubernetes Engine Admin. The Roles listing for your account will change to Multiple.

{{< image width="100%" ratio="22.94%" link="./dm_gcp_iam.png" caption="GKE-IAM Service"

}}

Then add the Kubernetes Engine Admin role:

{{< image width="70%" ratio="65.04%" link="./dm_gcp_iam_role.png" caption="GKE-IAM Role"

}}

Setup

Launch Deployment Manager

  1. Once you have an account and project enabled, click the following link to open the Deployment Manager.

    [Istio GKE Deployment Manager](https://accounts.google.com/signin/v2/identifier?service=cloudconsole&continue=https://console.cloud.google.com/launcher/config?templateurl={{< github_file >}}/install/gcp/deployment_manager/istio-cluster.jinja&followup=https://console.cloud.google.com/launcher/config?templateurl=https://raw.githubusercontent.com/istio/istio/master/install/gcp/deployment_manager/istio-cluster.jinja&flowName=GlifWebSignIn&flowEntry=ServiceLogin)

    You may also perform this task [from the command line using gcloud]({{< github_tree >}}/install/gcp/deployment_manager)

    We recommend that you leave the default settings as the rest of this tutorial shows how to access the installed features. By default the tool creates a GKE cluster with the specified settings, then installs the Istio control plane, the Bookinfo sample app, Grafana with Prometheus, Kiali, and Tracing. You'll find out more about how to access all of these below. This script will enable Istio auto-injection on the default namespace only.

  2. Click Deploy:

    {{< image width="60%" ratio="160%" link="./dm_launcher.png" caption="GKE-Istio Launcher"

    }}

Wait until Istio is fully deployed. Note that this can take up to five minutes.

Bootstrap gcloud

Once deployment is complete, do the following on the workstation where you've installed gcloud:

  1. Bootstrap kubectl for the cluster you just created and confirm the cluster is running and Istio is enabled

    {{< text bash >}} $ gcloud container clusters list NAME LOCATION MASTER_VERSION MASTER_IP MACHINE_TYPE NODE_VERSION NUM_NODES STATUS istio-cluster us-central1-a 1.9.7-gke.11 35.188.172.144 n1-standard-2 1.9.7-gke.11 4 RUNNING {{< /text >}}

    In this case, the cluster name is istio-cluster.

  2. Now acquire the credentials for this cluster

    {{< text bash >}} $ gcloud container clusters get-credentials istio-cluster --zone=us-central1-a {{< /text >}}

Verify installation

Verify Istio is installed in its own namespace

{{< text bash >}} $ kubectl get deployments,ing -n istio-system NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE deployment.extensions/grafana 1 1 1 1 3m deployment.extensions/istio-citadel 1 1 1 1 3m deployment.extensions/istio-egressgateway 2 2 2 2 3m deployment.extensions/istio-galley 1 1 1 1 3m deployment.extensions/istio-ingressgateway 2 2 2 2 3m deployment.extensions/istio-pilot 1 1 1 1 3m deployment.extensions/istio-policy 1 1 1 1 3m deployment.extensions/istio-sidecar-injector 1 1 1 1 3m deployment.extensions/istio-telemetry 1 1 1 1 3m deployment.extensions/istio-tracing 1 1 1 1 3m deployment.extensions/kiali 1 1 1 1 1m deployment.extensions/prometheus 1 1 1 1 3m deployment.extensions/servicegraph 1 1 1 1 3m {{< /text >}}

Now confirm that the Bookinfo sample application is also installed:

{{< text bash >}} $ kubectl get deployments,ing NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE deployment.extensions/details-v1 1 1 1 1 1m deployment.extensions/productpage-v1 1 1 1 1 1m deployment.extensions/ratings-v1 1 1 1 1 1m deployment.extensions/reviews-v1 1 1 1 1 1m deployment.extensions/reviews-v2 1 1 1 1 1m deployment.extensions/reviews-v3 1 1 1 1 1m {{< /text >}}

Now get the istio-ingress IP:

{{< text bash >}} $ kubectl get svc istio-ingressgateway -n istio-system NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE istio-ingressgateway LoadBalancer 10.59.245.24 35.239.8.197 80:31380/TCP,443:31390/TCP,31400:31400/TCP,15029:32759/TCP,15030:31508/TCP,15031:32482/TCP,15032:31532/TCP,15443:30156/TCP 4m {{< /text >}}

Note down the IP address (EXTERNAL-IP) and port assigned to the Bookinfo product page (in the example above, it's 35.239.8.197:80).

You can also view the installation using the Kubernetes Engine -> Workloads section on the Cloud Console:

{{< image width="70%" ratio="143.91%" link="./dm_kubernetes_workloads.png" caption="GKE-Workloads" >}}

Access the Bookinfo sample

  1. Set up an environment variable for Bookinfo's external IP address:

    {{< text bash >}} export GATEWAY_URL=(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.status.loadBalancer.ingress[0].ip}') $ echo $GATEWAY_URL {{< /text >}}

  2. Verify you can access the Bookinfo http://${GATEWAY_URL}/productpage:

    {{< image width="100%" ratio="45.04%" link="./dm_bookinfo.png" caption="Bookinfo"

    }}

  3. Now send some traffic to it:

    {{< text bash >}} for i in {1..100}; do curl -o /dev/null -s -w "%{http_code}\n" http://{GATEWAY_URL}/productpage; done {{< /text >}}

Verify installed Istio plugins

Once you have verified that the Istio control plane and sample application are working, try accessing the installed Istio plugins.

If you are using Cloud Shell rather than the installed gcloud client, you can port forward and proxy using its Web Preview feature. For example, to access Grafana from Cloud Shell, change the kubectl port mapping from 3000:3000 to 8080:3000. You can simultaneously preview four other consoles via Web Preview proxied on ranges 8080 to 8084.

Grafana

  1. Set up a tunnel to Grafana:

    {{< text bash >}} kubectl -n istio-system port-forward(kubectl -n istio-system get pod -l app=grafana -o jsonpath='{.items[0].metadata.name}') 3000:3000 & {{< /text >}}

  2. View the console at:

    {{< text plain >}} http://localhost:3000/dashboard/db/istio-dashboard {{< /text >}}

You should see some statistics for the requests you sent earlier.

{{< image width="100%" ratio="48.49%" link="./dm_grafana.png" caption="Grafana" >}}

For more details about using Grafana, see About the Grafana Add-on.

Prometheus

Prometheus is installed with Grafana. You can view Istio and application metrics using the console as follows:

  1. Set up a tunnel to Prometheus:

    {{< text bash >}} kubectl -n istio-system port-forward(kubectl -n istio-system get pod -l app=prometheus -o jsonpath='{.items[0].metadata.name}') 9090:9090 & {{< /text >}}

  2. View the console at:

    {{< text plain >}} http://localhost:9090/graph {{< /text >}}

{{< image width="100%" ratio="43.88%" link="./dm_prometheus.png" caption="Prometheus" >}}

For more details, see About the Prometheus Add-on.

Install mesh visualization tools

Kiali

  1. Set up a tunnel to Kiali:

    {{< text bash >}} kubectl -n istio-system port-forward(kubectl -n istio-system get pod -l app=kiali -o jsonpath='{.items[0].metadata.name}') 20001:20001 & {{< /text >}}

  2. You should see the Bookinfo service topology at

    {{< text plain >}} http://localhost:20001/kiali/console/overview {{< /text >}}

Enter the username/password for the Kiali admin console you specified during setup. Otherwise, the default username/password for the console is admin/mysecret.

{{< image width="100%" ratio="53.33%" link="./dm_kiali.png" caption="Kiali" >}}

For more details, see About the Kiali Add-on.

Tracing

  1. Set up a tunnel to the tracing dashboard:

    {{< text bash >}} kubectl port-forward -n istio-system(kubectl get pod -n istio-system -l app=jaeger -o jsonpath='{.items[0].metadata.name}') 16686:16686 & {{< /text >}}

  2. You should see the trace statistics sent earlier on http://localhost:16686

{{< image width="100%" ratio="42.35%" link="./dm-tracing.png" caption="Tracing Dashboard" >}}

For more details on tracing see Understanding what happened.

Uninstalling

  1. Navigate to the Deployments section of the Cloud Console.

  2. Select the deployment and click Delete.

  3. Deployment Manager will remove all the deployed GKE artifacts - however, items such as Ingress and LoadBalancers will remain. You can delete those artifacts by again going to the cloud console under Network Services -> Load balancing