application-gateway

Application Gateway

Overview

This is the repository for the Kyma Application Gateway.

Prerequisites

The Application Gateway requires Go 1.8 or higher.

Installation

To install the Application Gateway, follow these steps:

1. git clone git@github.com:kyma-project/kyma.git
2. cd kyma/components/application-gateway
3. CGO_ENABLED=0 go build ./cmd/applicationgateway

Usage

This section explains how to use the Application Gateway.

Start the Application Gateway

To start the Application Gateway, run this command:

./applicationgateway

The Application Gateway has the following parameters:

• proxyPort is the port that acts as a proxy for the calls from services and Functions to an external solution. The default port is 8080.
• externalAPIPort is the port that exposes the API allowing to check component status. The default port is 8081.
• application is the Application name used to write and read information about services. The default Application is default-ec.
• namespace is the Namespace in which the Application Gateway is deployed. The default Namespace is kyma-system.
• requestTimeout is the timeout for requests sent through the Application Gateway, expressed in seconds. The default value is 1.
• skipVerify is the flag for skipping the verification of certificates for the proxy targets. The default value is false.
• requestLogging is the flag for logging incoming requests. The default value is false.
• proxyTimeout is the timeout for requests sent through the proxy, expressed in seconds. The default value is 10.
• proxyCacheTTL is the time to live of the remote API information stored in the proxy cache, expressed in seconds. The default value is 120.

Development

This section explains the development process.

Generate mocks

Prerequisites:

• Mockery 2.0 or higher

To generate mocks, run:

go generate ./...

When adding a new interface to be mocked or when a mock of an existing interface is not being generated, add the following line directly above the interface declaration:

//go:generate mockery --name {INTERFACE_NAME}

Tests

This section outlines the testing details.

Unit tests

To run the unit tests, use the following command:

go test `go list ./internal/... ./cmd/...`

Generate Kubernetes clients for custom resources

1. Create a directory structure for each client, similar to the one in pkg/apis. For example, when generating a client for Egress Rule in Istio, the directory structure looks like this: pkg/apis/istio/v1alpha2.
2. After creating the directories, define the following files:
   • doc.go
   • register.go
   • types.go - define the custom structs that reflect the fields of the custom resource.

See an example in pkg/apis/istio/v1alpha2.

1. Go to the project root directory and run ./hack/update-codegen.sh. The script generates a new client in pkg/apis/client/clientset.

Contribution

To learn how you can contribute to this project, see the Contributing document.