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Set up Gloo Gateway

Start with setting up Gloo Gateway as an API gateway for your cluster.

In the following steps, you install the Gloo Gateway control plane and gateway proxy. When you install the Gloo Gateway control plane, a deployment named gloo-mesh-mgmt-server is created to translate and implement Gloo configurations that you create in other guides, such as controlling traffic with Gloo policies. The Gloo Gateway control plane also installs an ingress gateway proxy in your cluster named istio-ingressgateway. You can use the Gloo Gateway control plane to fully manage the lifecycle of this gateway proxy.

The instructions in this guide assume that you want to install the Gloo Gateway control plane and data plane in one cluster. To set up the control plane in a dedicated management cluster and the data plane in workload clusters instead, see the Multicluster setup.

Create or use an existing Kubernetes or OpenShift cluster, and save the cluster name in an environment variable. Note: The cluster name must be alphanumeric with no special characters except a hyphen (-), lowercase, and begin with a letter (not a number).
```
export CLUSTER_NAME=<cluster_name>
```
Install meshctl, the Gloo command line tool for bootstrapping Gloo Platform, registering clusters, describing configured resources, and more. Be sure to download version 2.4.2, which uses the latest Gloo Gateway installation values.
```
curl -sL https://run.solo.io/meshctl/install | GLOO_MESH_VERSION=v2.4.2 sh -
export PATH=$HOME/.gloo-mesh/bin:$PATH
```

Install Gloo Gateway in your cluster. This command uses a basic profile to install the control plane components, such as the management server and Prometheus server, and the data plane components, such as the agent, gateway proxy, rate limit server, and external auth server, in your cluster. If you do not have a license key, contact an account representative.

Kubernetes
OpenShift

meshctl install --profiles gloo-gateway-demo \
  --set common.cluster=$CLUSTER_NAME \
  --set licensing.glooGatewayLicenseKey=$GLOO_GATEWAY_LICENSE_KEY

Need to specify more settings? You can create a values.yaml file, and include it in your installation command with the --chart-values-file values.yaml flag. For example, you might include cloud provider specific-annotations for the ingress gateway, such as the following:

cat >values.yaml <<EOF
istioInstallations:
  northSouthGateways:
    - enabled: true
      name: istio-ingressgateway
      installations:
        - clusters:
          - activeGateway: true
            name: $CLUSTER_NAME
          gatewayRevision: auto
          istioOperatorSpec:
            components:
              ingressGateways:
              - enabled: true
                k8s:
                  serviceAnnotations:
                    service.beta.kubernetes.io/aws-load-balancer-backend-protocol: ssl
                    service.beta.kubernetes.io/aws-load-balancer-cross-zone-load-balancing-enabled: "true"
                    service.beta.kubernetes.io/aws-load-balancer-nlb-target-type: instance
                    service.beta.kubernetes.io/aws-load-balancer-scheme: internet-facing
                    service.beta.kubernetes.io/aws-load-balancer-ssl-cert: "arn:aws:acm:<cert>"
                    service.beta.kubernetes.io/aws-load-balancer-type: external
EOF

Elevate the permissions of the following service accounts that will be created. These permissions allow the ingress gateway proxy to make use of a user ID that is normally restricted by OpenShift. For more information, see the Istio on OpenShift documentation.

oc adm policy add-scc-to-group anyuid system:serviceaccounts:istio-system
oc adm policy add-scc-to-group anyuid system:serviceaccounts:gloo-mesh-gateways
oc adm policy add-scc-to-group anyuid system:serviceaccounts:gloo-mesh-addons
oc adm policy add-scc-to-group anyuid system:serviceaccounts:gm-iop-1-18-2

Create the gloo-mesh-gateways and gloo-mesh-addons projects, and create NetworkAttachmentDefinition custom resources for the projects.

kubectl create ns gloo-mesh-gateways
kubectl create ns gloo-mesh-addons

cat <<EOF | oc -n gloo-mesh-gateways create -f -
apiVersion: "k8s.cni.cncf.io/v1"
kind: NetworkAttachmentDefinition
metadata:
  name: istio-cni
EOF

cat <<EOF | oc -n gloo-mesh-addons create -f -
apiVersion: "k8s.cni.cncf.io/v1"
kind: NetworkAttachmentDefinition
metadata:
  name: istio-cni
EOF

Install Gloo Gateway.

meshctl install --profiles gloo-gateway-demo-openshift \
  --set common.cluster=$CLUSTER_NAME \
  --set licensing.glooGatewayLicenseKey=$GLOO_GATEWAY_LICENSE_KEY

Note: In OpenShift 4.11 and later, you might see warnings for the pods and containers which violate the OpenShift PodSecurity "restricted:v1.24" profile, due to the elevated permissions required by Istio. You can ignore these warnings. For more info, see this article.

Verify that Gloo Gateway is correctly installed. This check might take a few seconds to verify that:

Your Gloo Platform product licenses are valid and current.
The Gloo Platform CRDs are installed at the correct version.
The Gloo Gateway pods are running and healthy.
The Gloo agent is running and connected to the management server.

meshctl check

Example output:

🟢 License status

 INFO  gloo-gateway enterprise license expiration is 25 Aug 23 10:38 CDT
 INFO  Valid GraphQL license module found

🟢 CRD version check

🟢 Gloo Platform deployment status

Namespace        | Name                           | Ready | Status 
gloo-mesh        | gloo-mesh-agent                | 1/1   | Healthy
gloo-mesh        | gloo-mesh-mgmt-server          | 1/1   | Healthy
gloo-mesh        | gloo-mesh-redis                | 1/1   | Healthy
gloo-mesh        | gloo-mesh-ui                   | 1/1   | Healthy
gloo-mesh        | gloo-telemetry-gateway         | 1/1   | Healthy
gloo-mesh        | prometheus-server              | 1/1   | Healthy
gloo-mesh-addons | ext-auth-service               | 1/1   | Healthy
gloo-mesh-addons | rate-limiter                   | 1/1   | Healthy
gloo-mesh-addons | redis                          | 1/1   | Healthy
gloo-mesh        | gloo-telemetry-collector-agent | 3/3   | Healthy

🟢 Mgmt server connectivity to workload agents

Cluster  | Registered | Connected Pod                                   
cluster1 | true       | gloo-mesh/gloo-mesh-mgmt-server-65bd557b95-v8qq6

Verify that the gateway proxy service is created and assigned an external IP address. It might take a few minutes for the load balancer to deploy.

kubectl get svc -n gloo-mesh-gateways

Example output:

NAME                   TYPE           CLUSTER-IP      EXTERNAL-IP      PORT(S)                                                      AGE
istio-ingressgateway   LoadBalancer   10.XX.XXX.XXX   35.XXX.XXX.XXX   15021:30826/TCP,80:31257/TCP,443:30673/TCP,15443:30789/TCP   48s

Optional: Check out the workspace and workspace settings that were created for you. Workspaces help to organize team resources in your cluster, and to isolate Kubernetes and Gloo Gateway resources. Because the default workspace is used for demonstration purposes, it does not isolate any resources, and instead allows all Kubernetes and Gloo Gateway resources in the workspace.
```
kubectl get workspace $CLUSTER_NAME -n gloo-mesh -o yaml
```
```
kubectl get workspacesettings default -n gloo-mesh -o yaml
```
Optional for OpenShift: Expose the ingress gateway by using an OpenShift route.
```
oc -n gloo-mesh-gateways expose svc istio-ingressgateway --port=http2
```

Deploy sample apps to try out the routing capabilities and traffic policies in Gloo Gateway.

Understand what happened

Find out more information about the Gloo Gateway environment that you set up in this guide.

Gloo Gateway installation: This quick start guide used meshctl to install a minimum deployment of Gloo Gateway for testing purposes, and some optional components are not installed. To learn more about production-level installation options, including advanced configuration options available in the Gloo Gateway Helm chart, see the Setup guide.

Management server and agent: When you installed the Gloo Gateway control plane, a deployment named gloo-mesh-mgmt-server was created to translate and implement your Gloo configurations. Because the glooAgent.enabled: true setting is included in the gloo-gateway install profile, the cluster was also registered to be managed by Gloo. The deployment named gloo-mesh-agent was created to run the Gloo agent as part of the Gloo Gateway data plane.

Relay architecture: In a multicluster setup, the Gloo agent discovers Gloo and Kubernetes resources, such as deployments and services, and sends snapshots of them to the management server for translation and implementation. However, in a single cluster setup, your resources are written directly to the cluster without relay. For more information about relay server-agent communication, see the relay architecture page.

Gateway proxy installation: The gateway proxy installation profiles in this getting started guide were provided within the Gloo Gateway installation Helm chart. However, Gloo Gateway can discover gateway deployments regardless of their installation options. To manually install gateway proxies, see the advanced configuration guides.

Gloo workspace: Gloo workspaces let you organize team resources across Kubernetes namespaces and clusters. In this example, a single workspace is created for everything. Later, as your teams grow, you can create a workspace for each team, to enforce service isolation, set up federation, and even share resources by importing and exporting. You can also change the default workspace by following the Workspace setup guide.

Set up Gloo Gateway

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Understand what happened