envtest

Documentation

Overview

Package envtest provides libraries for integration testing by starting a local control plane

Control plane binaries (etcd and kube-apiserver) are loaded by default from /usr/local/kubebuilder/bin. This can be overridden by setting the KUBEBUILDER_ASSETS environment variable, or by directly creating a ControlPlane for the Environment to use.

Environment can also be configured to work with an existing cluster, and simply load CRDs and provide client configuration.

Index

• Constants
• func CreateCRDs(config *rest.Config, crds []runtime.Object) error
• func InstallCRDs(config *rest.Config, options CRDInstallOptions) ([]runtime.Object, error)
• func UninstallCRDs(config *rest.Config, options CRDInstallOptions) error
• func WaitForCRDs(config *rest.Config, crds []runtime.Object, options CRDInstallOptions) error
• type CRDInstallOptions
• type Environment
  • func (te *Environment) Start() (*rest.Config, error)
  • func (te *Environment) Stop() error

Constants

const (
	StartTimeout = 60
	StopTimeout  = 60
)

It's possible to override some defaults, by setting the following environment variables:

USE_EXISTING_CLUSTER (boolean): if set to true, envtest will use an existing cluster
TEST_ASSET_KUBE_APISERVER (string): path to the api-server binary to use
TEST_ASSET_ETCD (string): path to the etcd binary to use
TEST_ASSET_KUBECTL (string): path to the kubectl binary to use
KUBEBUILDER_ASSETS (string): directory containing the binaries to use (api-server, etcd and kubectl). Defaults to /usr/local/kubebuilder/bin.
KUBEBUILDER_CONTROLPLANE_START_TIMEOUT (string supported by time.ParseDuration): timeout for test control plane to start. Defaults to 20s.
KUBEBUILDER_CONTROLPLANE_STOP_TIMEOUT (string supported by time.ParseDuration): timeout for test control plane to start. Defaults to 20s.
KUBEBUILDER_ATTACH_CONTROL_PLANE_OUTPUT (boolean): if set to true, the control plane's stdout and stderr are attached to os.Stdout and os.Stderr

Functions

func CreateCRDs

func CreateCRDs(config *rest.Config, crds []runtime.Object) error

CreateCRDs creates the CRDs

func InstallCRDs

func InstallCRDs(config *rest.Config, options CRDInstallOptions) ([]runtime.Object, error)

InstallCRDs installs a collection of CRDs into a cluster by reading the crd yaml files from a directory

func UninstallCRDs

func UninstallCRDs(config *rest.Config, options CRDInstallOptions) error

UninstallCRDs uninstalls a collection of CRDs by reading the crd yaml files from a directory

func WaitForCRDs

func WaitForCRDs(config *rest.Config, crds []runtime.Object, options CRDInstallOptions) error

WaitForCRDs waits for the CRDs to appear in discovery

Types

type CRDInstallOptions

type CRDInstallOptions struct {
	// Paths is a list of paths to the directories or files containing CRDs
	Paths []string

	// CRDs is a list of CRDs to install
	CRDs []runtime.Object

	// ErrorIfPathMissing will cause an error if a Path does not exist
	ErrorIfPathMissing bool

	// MaxTime is the max time to wait
	MaxTime time.Duration

	// PollInterval is the interval to check
	PollInterval time.Duration

	// CleanUpAfterUse will cause the CRDs listed for installation to be
	// uninstalled when terminating the test environment.
	// Defaults to false.
	CleanUpAfterUse bool
}

CRDInstallOptions are the options for installing CRDs

type Environment

type Environment struct {
	// ControlPlane is the ControlPlane including the apiserver and etcd
	ControlPlane integration.ControlPlane

	// Config can be used to talk to the apiserver.  It's automatically
	// populated if not set using the standard controller-runtime config
	// loading.
	Config *rest.Config

	// CRDInstallOptions are the options for installing CRDs.
	CRDInstallOptions CRDInstallOptions

	// ErrorIfCRDPathMissing provides an interface for the underlying
	// CRDInstallOptions.ErrorIfPathMissing. It prevents silent failures
	// for missing CRD paths.
	ErrorIfCRDPathMissing bool

	// CRDs is a list of CRDs to install.
	// If both this field and CRDs field in CRDInstallOptions are specified, the
	// values are merged.
	CRDs []runtime.Object

	// CRDDirectoryPaths is a list of paths containing CRD yaml or json configs.
	// If both this field and Paths field in CRDInstallOptions are specified, the
	// values are merged.
	CRDDirectoryPaths []string

	// UseExisting indicates that this environments should use an
	// existing kubeconfig, instead of trying to stand up a new control plane.
	// This is useful in cases that need aggregated API servers and the like.
	UseExistingCluster *bool

	// ControlPlaneStartTimeout is the maximum duration each controlplane component
	// may take to start. It defaults to the KUBEBUILDER_CONTROLPLANE_START_TIMEOUT
	// environment variable or 20 seconds if unspecified
	ControlPlaneStartTimeout time.Duration

	// ControlPlaneStopTimeout is the maximum duration each controlplane component
	// may take to stop. It defaults to the KUBEBUILDER_CONTROLPLANE_STOP_TIMEOUT
	// environment variable or 20 seconds if unspecified
	ControlPlaneStopTimeout time.Duration

	// KubeAPIServerFlags is the set of flags passed while starting the api server.
	KubeAPIServerFlags []string

	// AttachControlPlaneOutput indicates if control plane output will be attached to os.Stdout and os.Stderr.
	// Enable this to get more visibility of the testing control plane.
	// It respect KUBEBUILDER_ATTACH_CONTROL_PLANE_OUTPUT environment variable.
	AttachControlPlaneOutput bool
}

Environment creates a Kubernetes test environment that will start / stop the Kubernetes control plane and install extension APIs

func (*Environment) Start

func (te *Environment) Start() (*rest.Config, error)

Start starts a local Kubernetes server and updates te.ApiserverPort with the port it is listening on

func (*Environment) Stop

func (te *Environment) Stop() error

Stop stops a running server. Previously installed CRDs, as listed in CRDInstallOptions.CRDs, will be uninstalled if CRDInstallOptions.CleanUpAfterUse are set to true.