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docs: create concepts docs page and diagram (envoyproxy#3808)
* Adding concept page with visual to docs site Signed-off-by: Erica Hughberg <[email protected]> * Fix EnvoyGatewayPatchPolicy to EnvoyPatchPolicy Signed-off-by: Erica Hughberg <[email protected]> * Fix ordering of columns and adding links. Signed-off-by: Erica Hughberg <[email protected]> * Adding to v1.0.2 as well Signed-off-by: Erica Hughberg <[email protected]> * Fixing links Signed-off-by: Erica Hughberg <[email protected]> * Added Backend resource to concept overview Signed-off-by: Erica Hughberg <[email protected]> * Tidy up and update docs for 1.0.2 Signed-off-by: Erica Hughberg <[email protected]> * Update arrow from Route to route targets Signed-off-by: Erica Hughberg <[email protected]> * fix: wrong path & title and add diagram Signed-off-by: bitliu <[email protected]> --------- Signed-off-by: Erica Hughberg <[email protected]> Signed-off-by: bitliu <[email protected]> Co-authored-by: Xunzhuo <[email protected]>
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| title: "Concepts" | ||
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| description: Learn about key concepts when working with Envoy Gateway | ||
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| title = "Envoy Gateway Resources" | ||
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| There are several resources that play a part in enabling you to meet your Kubernetes ingress traffic handling needs. This page provides a brief overview of the resources you’ll be working with. | ||
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| ## Overview | ||
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| There are several resources that play a part in enabling you to meet your Kubernetes ingress traffic handling needs. This page provides a brief overview of the resources you’ll be working with. | ||
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| # Overview | ||
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| ## Kubernetes Gateway API Resources | ||
| - **GatewayClass:** Defines a class of Gateways with common configuration. | ||
| - **Gateway:** Specifies how traffic can enter the cluster. | ||
| - **Routes:** **HTTPRoute, GRPCRoute, TLSRoute, TCPRoute, UDPRoute:** Define routing rules for different types of traffic. | ||
| ## Envoy Gateway (EG) API Resources | ||
| - **EnvoyProxy:** Represents the deployment and configuration of the Envoy proxy within a Kubernetes cluster, managing its lifecycle and settings. | ||
| - **EnvoyPatchPolicy, ClientTrafficPolicy, SecurityPolicy, BackendTrafficPolicy, EnvoyExtensionPolicy, BackendTLSPolicy:** Additional policies and configurations specific to Envoy Gateway. | ||
| - **Backend:** A resource that makes routing to cluster-external backends easier and makes access to external processes via Unix Domain Sockets possible. | ||
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| | Resource | API | Required | Purpose | References | Description | | ||
| | ----------------------------------------------------------------------- | ----------- | -------- | ------------------ | ---------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | ||
| | [GatewayClass][1] | Gateway API | Yes | Gateway Config | Core | Defines a class of Gateways with common configuration. | | ||
| | [Gateway][2] | Gateway API | Yes | Gateway Config | GatewayClass | Specifies how traffic can enter the cluster. | | ||
| | [HTTPRoute][3] [GRPCRoute][4] [TLSRoute][5] [TCPRoute][6] [UDPRoute][7] | Gateway API | Yes | Routing | Gateway | Define routing rules for different types of traffic. **Note:**_For simplicity these resources are referenced collectively as Route in the References column_ | | ||
| | [Backend][8] | EG API | No | Routing | N/A | Used for routing to cluster-external backends using FQDN or IP. Can also be used when you want to extend Envoy with external processes accessed via Unix Domain Sockets. | | ||
| | [ClientTrafficPolicy][9] | EG API | No | Traffic Handling | Gateway | Specifies policies for handling client traffic, including rate limiting, retries, and other client-specific configurations. | | ||
| | [BackendTrafficPolicy][10] | EG API | No | Traffic Handling | Gateway Route | Specifies policies for traffic directed towards backend services, including load balancing, health checks, and failover strategies. **Note:**_Most specific configuration wins_ | | ||
| | [SecurityPolicy][11] | EG API | No | Security | Gateway Route | Defines security-related policies such as authentication, authorization, and encryption settings for traffic handled by Envoy Gateway. **Note:**_Most specific configuration wins_ | | ||
| | [BackendTLSPolicy][12] | Gateway API | No | Security | Service | Defines TLS settings for backend connections, including certificate management, TLS version settings, and other security configurations. This policy is applied to Kubernetes Services. | | ||
| | [EnvoyProxy][13] | EG API | No | Customize & Extend | GatewayClass Gateway | The EnvoyProxy resource represents the deployment and configuration of the Envoy proxy itself within a Kubernetes cluster, managing its lifecycle and settings. **Note:**_Most specific configuration wins_ | | ||
| | [EnvoyPatchPolicy][14] | EG API | No | Customize & Extend | GatewayClass Gateway | This policy defines custom patches to be applied to Envoy Gateway resources, allowing users to tailor the configuration to their specific needs. **Note:**_Most specific configuration wins_ | | ||
| | [EnvoyExtensionPolicy][15] | EG API | No | Customize & Extend | Gateway Route, Backend | Allows for the configuration of Envoy proxy extensions, enabling custom behavior and functionality. **Note:**_Most specific configuration wins_ | | ||
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| [1]: https://gateway-api.sigs.k8s.io/api-types/gatewayclass/ | ||
| [2]: https://gateway-api.sigs.k8s.io/api-types/gateway/ | ||
| [3]: https://gateway-api.sigs.k8s.io/api-types/httproute/ | ||
| [4]: https://gateway-api.sigs.k8s.io/api-types/grpcroute/ | ||
| [5]: https://gateway-api.sigs.k8s.io/reference/spec/#gateway.networking.k8s.io/v1alpha2.TLSRoute | ||
| [6]: https://gateway-api.sigs.k8s.io/reference/spec/#gateway.networking.k8s.io/v1alpha2.TCPRoute | ||
| [7]: https://gateway-api.sigs.k8s.io/reference/spec/#gateway.networking.k8s.io/v1alpha2.UDPRoute | ||
| [8]: ../tasks/traffic/backend | ||
| [9]: ../api/extension_types#clienttrafficpolicy | ||
| [10]: ../api/extension_types#backendtrafficpolicy | ||
| [11]: ../api/extension_types#securitypolicy | ||
| [12]: https://gateway-api.sigs.k8s.io/api-types/backendtlspolicy/ | ||
| [13]: ../api/extension_types#envoyproxy | ||
| [14]: ../api/extension_types#envoypatchpolicy | ||
| [15]: ../api/extension_types#envoyextensionpolicy |
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