mirror of https://github.com/hashicorp/consul
200 lines
6.0 KiB
Markdown
200 lines
6.0 KiB
Markdown
---
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layout: docs
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page_title: Delegate authorization to Apigee
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description: Learn how to use the `ext-authz` Envoy extension to delegate data plane authorization requests to Apigee.
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---
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# Delegate authorization to Apigee
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This topic describes how to use the external authorization Envoy extension to delegate data plane authorization requests to Apigee.
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For more detailed guidance, refer to the [`learn-consul-apigee-external-authz` repo](https://github.com/hashicorp-education/learn-consul-apigee-external-authz) on GitHub.
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## Workflow
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Complete the following steps to use the external authorization extension with Apigee:
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1. Deploy the Apigee Adapter for Envoy and register the service in Consul.
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1. Configure the `EnvoyExtensions` block in a service defaults or proxy defaults configuration entry.
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1. Apply the configuration entry.
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## Deploy the Apigee Adapter for Envoy
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The [Apigee Adapter for Envoy](https://cloud.google.com/apigee/docs/api-platform/envoy-adapter/v2.0.x/concepts) is an Apigee-managed API gateway that uses Envoy to proxy API traffic.
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To download and install Apigee Adapter for Envoy, refer to the [getting started documentation](https://cloud.google.com/apigee/docs/api-platform/envoy-adapter/v2.0.x/getting-started) or follow along with the [`learn-consul-apigee-external-authz` repo](https://github.com/hashicorp-education/learn-consul-apigee-external-authz) on GitHub.
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After you deploy the service in your desired runtime, create a service defaults configuration entry for the service's gRPC protocol.
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<Tabs>
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<Tab heading="HCL" group="hcl">
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<CodeBlockConfig filename="apigee-remote-service-envoy.hcl">
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```hcl
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Kind = "service-defaults"
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Name = "apigee-remote-service-envoy"
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Protocol = "grpc"
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```
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</CodeBlockConfig>
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</Tab>
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<Tab heading="JSON" group="json">
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<CodeBlockConfig filename="apigee-remote-service-envoy.json">
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```json
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{
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"kind": "service-defaults",
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"name": "apigee-remote-service-envoy",
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"protocol": "grpc"
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}
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```
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</CodeBlockConfig>
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</Tab>
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<Tab heading="YAML" group="yaml">
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<CodeBlockConfig filename="apigee-remote-service-envoy.yaml">
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```yaml
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apiVersion: consul.hashicorp.com/v1alpha1
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kind: ServiceDefaults
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metadata:
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name: apigee-remote-service-envoy
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namespace: apigee
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spec:
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protocol: grpc
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```
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</CodeBlockConfig>
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</Tab>
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</Tabs>
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## Configure the `EnvoyExtensions`
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Add Envoy extension configurations to a proxy defaults or service defaults configuration entry. Place the extension configuration in an `EnvoyExtensions` block in the configuration entry.
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- When you configure Envoy extensions on proxy defaults, they apply to every service.
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- When you configure Envoy extensions on service defaults, they apply to all instances of a service with that name.
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<Warning>
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Adding Envoy extensions default proxy configurations may have unintended consequences. We recommend configuring `EnvoyExtensions` in service defaults configuration entries in most cases.
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</Warning>
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Consul applies Envoy extensions configured in proxy defaults before it applies extensions in service defaults. As a result, the Envoy extension configuration in service defaults may override configurations in proxy defaults.
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The following example configures the default behavior for all services named `api` so that the Envoy proxies running as sidecars for those service instances target the apigee-remote-service-envoy service for gRPC authorization requests:
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<Tabs>
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<Tab heading="HCL" group="hcl">
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<CodeBlockConfig filename="api-auth-service-defaults.hcl">
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```hcl
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Kind = "service-defaults"
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Name = "api"
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EnvoyExtensions = [
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{
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Name = "builtin/ext-authz"
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Arguments = {
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ProxyType = "connect-proxy"
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Config = {
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GrpcService = {
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Target = {
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Service = {
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Name = "apigee-remote-service-envoy"
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}
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}
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}
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}
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}
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}
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]
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```
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</CodeBlockConfig>
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</Tab>
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<Tab heading="JSON" group="json">
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<CodeBlockConfig filename="api-auth-service-defaults.json">
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```json
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{
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"Kind": "service-defaults",
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"Name": "api",
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"EnvoyExtensions": [{
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"Name": "builtin/ext-authz",
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"Arguments": {
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"ProxyType": "connect-proxy",
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"Config": {
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"GrpcService": {
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"Target": {
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"Service": {
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"Name": "apigee-remote-service-envoy"
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}
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}
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}
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}
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}
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}
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]
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}
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```
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</CodeBlockConfig>
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</Tab>
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<Tab heading="YAML" group="yaml">
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<CodeBlockConfig filename="api-auth-service-defaults.yaml">
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```yaml
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apiVersion: consul.hashicorp.com/v1alpha1
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kind: ServiceDefaults
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metadata:
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name: api
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namespace: default
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spec:
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envoyExtensions:
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- name: builtin/ext-authz
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arguments:
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proxyType: connect-proxy
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config:
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grpcService:
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target:
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service:
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name: apigee-remote-service-envoy
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namespace: apigee
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```
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</CodeBlockConfig>
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</Tab>
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</Tabs>
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Refer to the [external authorization extension configuration reference](/consul/docs/connect/proxies/envoy-extensions/configuration/ext-authz) for details on how to configure the extension.
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Refer to the [proxy defaults configuration entry reference](/consul/docs/connect/config-entries/proxy-defaults) and [service defaults configuration entry reference](/consul/docs/connect/config-entries/service-defaults) for details on how to define the configuration entries.
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## Apply the configuration entry
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On the CLI, you can use the `consul config write` command and specify the names of the configuration entries to apply them to Consul. For Kubernetes-orchestrated networks, use the `kubectl apply` command to update the relevant CRD.
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<Tabs>
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<Tab heading="HCL" group="hcl">
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```shell-session
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$ consul config write apigee-remote-service-envoy.hcl
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$ consul config write api-auth-service-defaults.hcl
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```
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</Tab>
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<Tab heading="JSON" group="json">
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```shell-session
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$ consul config write apigee-remote-service-envoy.json
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$ consul config write api-auth-service-defaults.json
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```
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</Tab>
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<Tab heading="YAML" group="yaml">
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```shell-session
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$ kubectl apply -f apigee-remote-service-envoy.yaml
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$ kubectl apply -f api-auth-service-defaults.yaml
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```
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</Tab>
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</Tabs>
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