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Merge pull request #13333 from hashicorp/docs/capig-instances-config 

docs: Consul API Gateway scaling config
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Nathan Coleman 2022-06-13 11:45:03 -04:00 committed by GitHub
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website/content/docs/api-gateway/consul-api-gateway-install.mdx
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@ -168,6 +168,9 @@ The following table describes the allowed parameters for the `spec` array:
| `consul.ports.http` | Specifies the port for Consul's HTTP server. | Integer | `8500` |
| `consul.scheme` | Specifies the scheme to use for connecting to Consul. The supported values are `"http"` and `"https"`. | String | `"http"` |
| `copyAnnotations.service` | List of annotations to copy to the gateway service. | Array | `["external-dns.alpha.kubernetes.io/hostname"]` |
| `deployment.defaultInstances` | Specifies the number of instances to deploy by default for each gateway. | Integer | 1 |
| `deployment.maxInstances` | Specifies the maximum allowed number of instances per gateway. | Integer | 8 |
| `deployment.minInstances` | Specifies the minimum allowed number of instances per gateway. | Integer | 1 |
| `image.consulAPIGateway` | The image to use for consul-api-gateway. View available image tags on [DockerHub](https://hub.docker.com/r/hashicorp/consul-api-gateway/tags). | String | `"hashicorp/consul-api-gateway:RELEASE_VERSION"` |
| `image.envoy` | Specifies the container image to use for Envoy. View available image tags on [DockerHub](https://hub.docker.com/r/envoyproxy/envoy/tags). | String | `"envoyproxy/envoy:RELEASE_VERSION"` |
| `logLevel` | Specifies the error reporting level for logs. You can specify the following values: `error`, `warning`, `info`, `debug`, `trace`. | String | `"info"` |
@ -263,6 +266,25 @@ Add the `listener` object to the `gateway` configuration and specify the followi
Refer to the [Kubernetes Gateway API documentation](https://gateway-api.sigs.k8s.io/v1alpha2/references/spec/#gateway.networking.k8s.io/v1alpha2.Listener) for details about configuring listeners.
#### Scaling
You can scale a logical gateway object to multiple instances with the [`kubectl scale`](https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#scaling-a-deployment) command. The object scales according to the bounds set in GatewayClassConfig.
```
$ kubectl get deployment --selector api-gateway.consul.hashicorp.com/name=example-gateway
NAME READY UP-TO-DATE AVAILABLE
example-gateway 1/1 1 1
```
```
$ kubectl scale deployment/example-gateway --replicas=3
deployment.apps/example-gateway scaled
```
```
$ kubectl get deployment --selector api-gateway.consul.hashicorp.com/name=example-gateway
NAME READY UP-TO-DATE AVAILABLE
example-gateway 3/3 3 3
```
### Route
Routes are independent configuration objects that are associated with specific listeners.