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    Ingress Controllers

    Last updated: 2023-05-06 19:41:07
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      Ingress Controllers

      Application CLB

      Application CLB is a TKE Ingress Controller based on the Tencent Cloud Load Balancer (CLB), which can implement the access of different services in the cluster with different URLs. CLB directly forwards the traffic to a Pod through the NodePort (the traffic is forwarded to a Pod in the CLB-to-Pod direct access mode). One Ingress configuration is bound to one CLB instance (IP), which is suitable for scenarios that only require simple routing management and are insensitive to IP address convergence. For more information, see CLB Type Ingress.

      Istio Ingress Gateway

      Istio Ingress Gateway is an Ingress Controller based on Tencent Cloud CLB and Istio Ingress Gateway (provided by Tencent Cloud TCM). The control plane and related supporting components are maintained by Tencent Cloud. You only need to deploy the containerized data plane that performs traffic forwarding in the cluster. You can use native Kubernetes Ingress or Istio API that provides more refined traffic management capabilities. A layer of proxy (envoy) is added after CLB, which is suitable for scenarios where there are more requirements for access layer routing management, IP address convergence, and entrance traffic management of cross-cluster and heterogeneous deployment service.

      Dedicated API Gateway

      Dedicated API Gateway is a TKE Ingress Controller based on a dedicated Tencent Cloud API Gateway instance. It is suitable for scenarios where multiple TKE clusters require a unified access layer or the access layer requires authentication and traffic throttling. For more information, see API Gateway Type Ingress. It has the following strengths:
      API Gateway is directly connected to the Pods of the TKE cluster without any intermediate nodes.
      An API Gateway TKE tunnel can connect multiple TKE services at the same time, among which the traffic is distributed based on the weighted round robin algorithm.
      Advanced extended capabilities provided by API Gateway can be used, such as authentication, traffic throttling, canary traffic distribution, caching, and downgrade upon circuit breaking.
      Supported by a dedicated API Gateway instance, the underlying physical resources of a user are exclusive to the user, with a stable performance and high SLA delivered.

      Nginx Ingress Controller

      Nginx Ingress Controller is an Ingress controller based on Tencent Cloud CLB and Nginx reverse proxy (containerized deployment in cluster). It extends the features of native Kubernetes Ingress through Annotations, and adds a layer of proxy (nginx) after CLB, which is suitable for scenarios where there are more requirements for access layer routing management and IP address convergence. For more information, see Nginx Type Ingress.

      Ingress Controllers Comparison

      Module
      Description
      Application CLB
      Istio Ingress Gateway (Provided by Tencent Cloud TCM)
      Dedicated API Gateway
      Nginx Ingress Controller
      Traffic management
      Supported protocols
      HTTP and HTTPS
      HTTP, HTTPS, HTTP2, GRPC, TCP, and TCP + TLS
      HTTP, HTTPS, HTTP2, and GRPC
      HTTP, HTTPS, HTTP2, GRPC, TCP, and UDP
      IP Management
      One Ingress rule corresponds to one IP (CLB).
      Multiple Ingress rules correspond to one IP (CLB). IP address convergence is supported.
      Multiple Ingress rules correspond to one IP (Dedicated API Gateway). IP address convergence is supported.
      Multiple Ingress rules correspond to one IP (CLB). IP address convergence is supported.
      Attribute route
      HOST and URL
      More attributes are supported, such as header, method, query, and parameter.
      More attributes are supported, such as header, method, query, and parameter.
      More attributes are supported, such as header and cookie.
      Traffic behavior
      Not supported
      Behaviors such as rewrite and redirection are supported.
      Redirection, custom request, and custom response are supported.
      Behaviors such as rewrite and redirection are supported.
      Region-aware load balancing
      Not supported
      Supported
      Not supported
      Not supported
      Application access addressing
      Service discovery
      Single Kubernetes cluster
      Multiple Kubernetes clusters + heterogeneous service
      Multiple Kubernetes clusters
      Single Kubernetes cluster
      Security
      SSL configuration
      Supported
      Supported
      Supported
      Supported
      Authentication authorization
      Not supported
      Supported
      Supported
      Supported
      Observability
      Monitoring metrics
      Supported (View in CLB)
      Supported (Cloud native monitoring or Tencent Cloud Observability Platform)
      Supported (View in API Gateway)
      Supported (Cloud native monitoring)
      Call tracing
      Not supported
      Supported
      Not supported
      Not supported
      Add-on Ops
      The associated CLB has been managed. You only need to run TKE Ingress Controller in the cluster.
      The control plane has been managed. You only need to run the data plane Ingress Gateway.
      You don't need to run the control plane in the Kubernetes cluster. Instead, simply enable the private network access feature in the cluster.
      You need to run Nginx Ingress Controller in the cluster (control plane + data plane).
      
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