provider-http

provider-http is a Crossplane Provider designed to facilitate sending HTTP requests as resources.

Installation

To install provider-http, you have two options:

1. Using the Crossplane CLI in a Kubernetes cluster where Crossplane is installed:

   crossplane xpkg install provider xpkg.upbound.io/crossplane-contrib/provider-http:v1.0.13

2. Manually creating a Provider by applying the following YAML:

   apiVersion: pkg.crossplane.io/v1
   kind: Provider
   metadata:
     name: provider-http
   spec:
     package: 'xpkg.upbound.io/crossplane-contrib/provider-http:v1.0.13'

Supported Resources

provider-http supports resources in two scopes:

Cluster-scoped Resources (http.crossplane.io)

• DisposableRequest: Initiates a one-time HTTP request. See DisposableRequest CRD documentation.
• Request: Manages a resource through HTTP requests. See Request CRD documentation.

Namespaced Resources (http.m.crossplane.io)

• DisposableRequest: Namespace-scoped version of the disposable HTTP request.
• Request: Namespace-scoped version of the managed HTTP resource.
• ProviderConfig: Namespace-scoped provider configuration.
• ClusterProviderConfig: Cluster-scoped provider configuration for cross-namespace access.

When to use each:

• Use cluster-scoped resources for shared infrastructure and when you have cluster-admin privileges
• Use namespaced resources for tenant isolation, application-specific resources, and when working with namespace-level permissions

TLS Certificate Authentication

The provider supports TLS certificate-based authentication for secure API communication:

• CA Certificates: Trust custom certificate authorities
• Client Certificates: Mutual TLS (mTLS) authentication
• Flexible Configuration: Set TLS at provider or resource level
• Secret References: Load certificates from Kubernetes secrets

Quick Start

1. Create certificate secrets:

# CA certificate
kubectl create secret generic ca-certs \
  --from-file=ca.crt=./ca-cert.pem \
  --namespace=crossplane-system

# Client certificate for mTLS
kubectl create secret tls client-certs \
  --cert=./client.crt \
  --key=./client.key \
  --namespace=crossplane-system

2. Configure ProviderConfig:

apiVersion: http.crossplane.io/v1alpha1
kind: ProviderConfig
metadata:
  name: secure-http
spec:
  credentials:
    source: None
  tls:
    caCertSecretRef:
      name: ca-certs
      namespace: crossplane-system
      key: ca.crt
    clientCertSecretRef:
      name: client-certs
      namespace: crossplane-system
      key: tls.crt
    clientKeySecretRef:
      name: client-certs
      namespace: crossplane-system
      key: tls.key

3. Use in requests:

apiVersion: http.crossplane.io/v1alpha2
kind: Request
metadata:
  name: secure-api-call
spec:
  providerConfigRef:
    name: secure-http
  forProvider:
    url: https://api.example.com/resource
    method: GET

See examples/provider/tls-config.yaml for more configuration options.

Usage

DisposableRequest

Create a DisposableRequest resource to initiate a single-use HTTP interaction:

apiVersion: http.crossplane.io/v1alpha2
kind: DisposableRequest
metadata:
  name: example-disposable-request
spec:
  # Add your DisposableRequest specification here

For more detailed examples and configuration options, refer to the examples directory.

Request

Manage a resource through HTTP requests with a Request resource:

apiVersion: http.crossplane.io/v1alpha2
kind: Request
metadata:
  name: example-request
spec:
  # Add your Request specification here

For more detailed examples and configuration options, refer to the examples directory.

Namespaced Resources

For namespace-scoped resources, use the http.m.crossplane.io API group:

apiVersion: http.m.crossplane.io/v1alpha2
kind: Request
metadata:
  name: example-namespaced-request
  namespace: my-namespace
spec:
  # Add your Request specification here
  providerConfigRef:
    name: my-namespaced-config

For namespaced examples and configuration options, refer to the namespaced examples directory.

Developing locally

Run controller against the cluster:

make run

Run tests

make test
make e2e

Troubleshooting

If you encounter any issues during installation or usage, refer to the troubleshooting guide for common problems and solutions.