mirror of https://github.com/status-im/consul.git
153 lines
5.4 KiB
Plaintext
153 lines
5.4 KiB
Plaintext
---
|
||
layout: docs
|
||
page_title: Delegate authorization to an external service
|
||
description: Learn how to use the `ext-authz` Envoy extension to delegate data plane authorization requests to external systems.
|
||
---
|
||
|
||
# Delegate authorization to an external service
|
||
|
||
This topic describes how to use the external authorization Envoy extension to delegate data plane authorization requests to external systems.
|
||
|
||
## Workflow
|
||
|
||
Complete the following steps to use the external authorization extension:
|
||
|
||
1. Configure an `EnvoyExtensions` block in a service defaults or proxy defaults configuration entry.
|
||
1. Apply the configuration entry.
|
||
|
||
## Add the `EnvoyExtensions`
|
||
|
||
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.
|
||
|
||
- When you configure Envoy extensions on proxy defaults, they apply to every service.
|
||
- When you configure Envoy extensions on service defaults, they apply to a specific service.
|
||
|
||
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.
|
||
|
||
The following example shows a service defaults configuration entry for the `api` service that directs the Envoy proxy to make gRPC authorization requests to the `authz` service:
|
||
|
||
<Tabs>
|
||
<Tab heading="HCL" group="hcl">
|
||
<CodeBlockConfig filename="api-auth-service-defaults.hcl">
|
||
|
||
```hcl
|
||
Kind = "service-defaults"
|
||
Name = "api"
|
||
EnvoyExtensions = [
|
||
{
|
||
Name = "builtin/ext-authz"
|
||
Arguments = {
|
||
ProxyType = "connect-proxy"
|
||
Config = {
|
||
GrpcService = {
|
||
Target = {
|
||
Service = {
|
||
Name = "authz"
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
]
|
||
```
|
||
</CodeBlockConfig>
|
||
</Tab>
|
||
<Tab heading="JSON" group="json">
|
||
<CodeBlockConfig filename="api-auth-service-defaults.json">
|
||
|
||
```json
|
||
"Kind": "service-defaults",
|
||
"Name": "api",
|
||
"EnvoyExtensions": [{
|
||
"Name": "builtin/ext-authz",
|
||
"Arguments": {
|
||
"ProxyType": "connect-proxy",
|
||
"Config": {
|
||
"GrpcService": {
|
||
"Target": {
|
||
"Service": {
|
||
"Name": "authz"
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
]
|
||
```
|
||
|
||
</CodeBlockConfig>
|
||
</Tab>
|
||
<Tab heading="Kubernetes" group="yaml">
|
||
<CodeBlockConfig filename="api-auth-service-defaults">
|
||
|
||
```yaml
|
||
apiVersion: consul.hashicorp.com/v1alpha1
|
||
kind: ServiceDefaults
|
||
metadata:
|
||
name: api
|
||
namespace: default
|
||
spec:
|
||
envoyExtensions:
|
||
- name: builtin/ext-authz
|
||
arguments:
|
||
proxyType: connect-proxy
|
||
config:
|
||
grpcService:
|
||
target:
|
||
service:
|
||
name: authz
|
||
namespace: authz
|
||
```
|
||
</CodeBlockConfig>
|
||
</Tab>
|
||
</Tabs>
|
||
|
||
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.
|
||
|
||
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.
|
||
|
||
!> **Warning:** Adding Envoy extensions default proxy configurations may have unintended consequences. We recommend configuring `EnvoyExtensions` in service defaults configuration entries in most cases.
|
||
|
||
### Unsupported Envoy configuration fields
|
||
|
||
The following Envoy configurations are not supported:
|
||
|
||
| Configuration | Workaround |
|
||
| --- | --- |
|
||
| `deny_at_disable` | Disable filter by removing it from the service’s configuration in the configuration entry. |
|
||
| `failure_mode_allow` | Set the `EnvoyExtension.Required` field to `true` in the [service defaults configuration entry](/consul/docs/connect/config-entries/service-defaults#envoyextensions) or [proxy defaults configuration entry](/consul/docs/connect/config-entries/proxy-defaults#envoyextensions). |
|
||
| `filter_enabled` | Set the `EnvoyExtension.Required` field to `true` in the [service defaults configuration entry](/consul/docs/connect/config-entries/service-defaults#envoyextensions) or [proxy defaults configuration entry](/consul/docs/connect/config-entries/proxy-defaults#envoyextensions). |
|
||
| `filter_enabled_metadata` | Set the `EnvoyExtension.Required` field to `true` in the [service defaults configuration entry](/consul/docs/connect/config-entries/service-defaults#envoyextensions) or [proxy defaults configuration entry](/consul/docs/connect/config-entries/proxy-defaults#envoyextensions). |
|
||
| `transport_api_version` | Consul only supports v3 of the transport API. As a result, there is no workaround for implementing the behavior of this field. |
|
||
|
||
## Apply the configuration entry
|
||
|
||
If your network is deployed to virtual machines, use the `consul config write` command and specify the proxy defaults or service defaults configuration entry to apply the configuration. For Kubernetes-orchestrated networks, use the `kubectl apply` command. The following example applies the extension in a proxy defaults configuration entry.
|
||
|
||
<Tabs>
|
||
<Tab heading="HCL" group="hcl">
|
||
|
||
```shell-session
|
||
$ consul config write api-auth-service-defaults.hcl
|
||
```
|
||
|
||
</Tab>
|
||
<Tab heading="JSON" group="json">
|
||
|
||
```shell-session
|
||
$ consul config write api-auth-service-defaults.json
|
||
|
||
```
|
||
|
||
</Tab>
|
||
<Tab heading="Kubernetes" group="kubernetes">
|
||
|
||
```shell-session
|
||
$ kubectl apply -f api-auth-service-defaults.yaml
|
||
```
|
||
|
||
</Tab>
|
||
</Tabs>
|