testcluster

package
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 Go to latest Published: Nov 20, 2024 License: Apache-2.0, MIT Imports: 20 Imported by: 0

Documentation

Overview

Package testcluster wraps the Kubernetes library for common test operations. It also provides a TestCluster abstraction for interacting with clusters.

Index

Constants

View Source 
const (
	RuntimeTypeGVisor            = RuntimeType("gvisor")
	RuntimeTypeUnsandboxed       = RuntimeType("runc")
	RuntimeTypeGVisorNvidia      = RuntimeType("gvisor-nvidia")
	RuntimeTypeGVisorTPU         = RuntimeType("gvisor-tpu")
	RuntimeTypeUnsandboxedNvidia = RuntimeType("runc-nvidia")
	RuntimeTypeUnsandboxedTPU    = RuntimeType("runc-tpu")
)

List of known runtime types.

View Source 
const (
	// NamespaceDefault is the default namespace for Kubernetes.
	NamespaceDefault = v13.NamespaceDefault

	// NamespaceSanity is used for objects that are part of sanity checks.
	NamespaceSanity = "sanity"

	// NamespaceBenchmark is used for objects that are part of benchmarks.
	NamespaceBenchmark = "benchmark"
)

Common namespace names.

View Source 
const (
	// TestRuntimeNodepoolName is the value that marks a "test-runtime-nodepool", or a nodepool where
	// w/ the runtime under test.
	TestRuntimeNodepoolName = "test-runtime-nodepool"
	// ClientNodepoolName is the value that marks a client nodepool. Usually this is a plain GKE
	// nodepool
	ClientNodepoolName = "client-nodepool"
	// TertiaryNodepoolName is the value that marks the tertiary nodepool.
	// This could either be a plain GKE nodepool or could be gVisor-enabled,
	// as configured during test range creation.
	TertiaryNodepoolName = "tertiary-nodepool"
)

Nodepool names.

View Source 
const (
	// NodePoolTypeKey is the key to mark a nodepool as a "test-runtime-nodepool" or a "client-nodepool"
	NodePoolTypeKey = "nodepool-type"
	// NodepoolRuntimeKey is the key to mark the runtime used by a nodepool.
	NodepoolRuntimeKey = "runtime"
	// NodepoolNumAcceleratorsKey is the key to mark the number of accelerators in a nodepool.
	NodepoolNumAcceleratorsKey = "num-accelerators"
	// NodepoolTPUTopologyKey is the key to mark the TPU topology used by a nodepool.
	NodepoolTPUTopologyKey = "tpu-topology"
	// Name of the nodepool key used in Pod.Spec.NodeSelector.
	NodePoolSelectorKey = "cloud.google.com/gke-nodepool"
	// Name of the TPU accelerator key used in Pod.Spec.NodeSelector.
	NodepoolTPUAcceleratorSelectorKey = "cloud.google.com/gke-tpu-accelerator"
	// Name of the TPU topology key used in Pod.Spec.NodeSelector.
	NodepoolTPUTopologySelectorKey = "cloud.google.com/gke-tpu-topology"
)

Nodepool keys.

View Source 
const (
	AcceleratorTypeTeslaT4GPU = AcceleratorType("nvidia-tesla-t4")
	AcceleratorTypeA100GPU    = AcceleratorType("nvidia-tesla-a100")
	AcceleratorTypeL4GPU      = AcceleratorType("nvidia-tesla-l4")
	AcceleratorTypeV4PodTPU   = AcceleratorType("tpu-v4-pod")
)

List of supported GPUs.

Variables

View Source 
var (
	// DefaultMachineType is the default machine type to use for specs and create-default.
	DefaultMachineType = "n2-standard-4"
	// DefaultNvidiaMachineType is the default machine type for nvidia.
	DefaultNvidiaMachineType = "n1-standard-4"
	// TPUAcceleratorMachineTypeMap maps TPU types to the machine type to use.
	TPUAcceleratorMachineTypeMap = map[AcceleratorType]string{
		AcceleratorTypeV4PodTPU: "ct4p-hightpu-4t",
	}
)

Default machine types.

Functions

func GetIPFromService 

func GetIPFromService(service *v13.Service) string

GetIPFromService returns the IP on a service.

func MaybeSetContainerResources 

func MaybeSetContainerResources(pod *v13.Pod, containerName string, requests ContainerResourcesRequest) (*v13.Pod, error)

MaybeSetContainerResources sets container resources if flags are given. Sets both the resource limits and requests as container runtimes honor them differently.

func WithTestClusterConstructor 

func WithTestClusterConstructor(ctx context.Context, constructor func(context.Context, *testpb.Cluster) (*TestCluster, error)) context.Context

WithTestClusterConstructor returns a context that contains a custom constructor for TestCluster.

Types

type AcceleratorType 

type AcceleratorType string

AcceleratorType is the gpu type to be used.

type ContainerResourcesRequest 

type ContainerResourcesRequest struct {
	CPUResources    string // CPUResources to request. Note: Will be overridden by flag above.
	MemoryResources string // MemoryResources to request. Note: Will be overridden by flag above.
	GPU             bool
}

ContainerResourcesRequest holds arguments to set requested resource on a container.

type Namespace 

type Namespace struct {
	Namespace string
	// contains filtered or unexported fields
}

Namespace represents a Kubernetes object namespace. It can contain pods or services or other Kubernetes objects. It is useful in tests that create multiple objects and want to ensure their mutual destruction, as well as for re-running tests and ensuring that the objects from past runs are cleaned up properly on the next run.

func (*Namespace) Cleanup 

func (n *Namespace) Cleanup(ctx context.Context) error

Cleanup deletes this namespace if it exists.

func (*Namespace) GetPersistentVolume 

func (n *Namespace) GetPersistentVolume(name, size string) *v13.PersistentVolumeClaim

GetPersistentVolume gets a persistent volume spec for benchmarks.

func (*Namespace) GetService 

func (n *Namespace) GetService(name string, spec v13.ServiceSpec) *v13.Service

GetService gets a service spec for benchmarks.

func (*Namespace) NewAlpinePod 

func (n *Namespace) NewAlpinePod(name, image string, cmd []string) *v13.Pod

NewAlpinePod returns an alpine pod template.

func (*Namespace) NewPod 

func (n *Namespace) NewPod(name string) *v13.Pod

NewPod returns a pod template.

func (*Namespace) Reset 

func (n *Namespace) Reset(ctx context.Context) error

Reset deletes this namespace if it exists, and unconditionally creates a new namespace of this name. This should be used in the beginning of tests, such that the namespace is empty and ready to be used.

type RuntimeType 

type RuntimeType string

RuntimeType is a supported runtime for the test nodepool.

func (RuntimeType) ApplyNodepool 

func (t RuntimeType) ApplyNodepool(nodepool *cspb.NodePool, accelType AcceleratorType, accelShape string, accelRes string)

ApplyNodepool modifies the nodepool to configure it to use the runtime.

func (RuntimeType) ApplyPodSpec 

func (t RuntimeType) ApplyPodSpec(podSpec *v13.PodSpec)

ApplyPodSpec modifies a PodSpec to use this runtime.

type TestCluster 

type TestCluster struct {
	// contains filtered or unexported fields
}

TestCluster wraps clusters with their individual ClientSets so that helper methods can be called.

func NewTestCluster 

func NewTestCluster(ctx context.Context, cluster *testpb.Cluster) (*TestCluster, error)

NewTestCluster returns a new TestCluster client.

func NewTestClusterWithClient 

func NewTestClusterWithClient(cluster *testpb.Cluster, client kubernetes.Interface) *TestCluster

NewTestClusterWithClient returns a new TestCluster client with a given client.

func (*TestCluster) Cluster 

func (t *TestCluster) Cluster() *testpb.Cluster

Cluster returns the underlying cluster proto for tests.

func (*TestCluster) ConfigureDaemonSetForRuntimeTestNodepool 

func (t *TestCluster) ConfigureDaemonSetForRuntimeTestNodepool(ds *appsv1.DaemonSet) error

ConfigureDaemonSetForRuntimeTestNodepool configures the DaemonSet to run on the test runtime.

func (*TestCluster) ConfigurePodForClientNodepool 

func (t *TestCluster) ConfigurePodForClientNodepool(pod *v13.Pod) (*v13.Pod, error)

ConfigurePodForClientNodepool configures the pod to run on the client nodepool.

func (*TestCluster) ConfigurePodForRuntimeTestNodepool 

func (t *TestCluster) ConfigurePodForRuntimeTestNodepool(pod *v13.Pod) (*v13.Pod, error)

ConfigurePodForRuntimeTestNodepool configures the pod to run on the test runtime.

func (*TestCluster) ConfigurePodForTertiaryNodepool 

func (t *TestCluster) ConfigurePodForTertiaryNodepool(pod *v13.Pod) (*v13.Pod, error)

ConfigurePodForTertiaryNodepool configures the pod to run on the tertiary nodepool.

func (*TestCluster) ContainerCluster 

func (t *TestCluster) ContainerCluster() (*cspb.Cluster, error)

ContainerCluster returns the underlying container cluster proto.

func (*TestCluster) ContainerDurationSecondsByName 

func (t *TestCluster) ContainerDurationSecondsByName(ctx context.Context, pod *v13.Pod, containerName string) (time.Duration, error)

ContainerDurationSecondsByName gets the runtime of a container reported by the kubelet by name. The kubelet reports runtime at second granularity.

func (*TestCluster) CreateDaemonset 

func (t *TestCluster) CreateDaemonset(ctx context.Context, ds *appsv1.DaemonSet) (*appsv1.DaemonSet, error)

CreateDaemonset creates a daemonset with default options.

func (*TestCluster) CreatePersistentVolume 

func (t *TestCluster) CreatePersistentVolume(ctx context.Context, volume *v13.PersistentVolumeClaim) (*v13.PersistentVolumeClaim, error)

CreatePersistentVolume creates a persistent volume.

func (*TestCluster) CreatePod 

func (t *TestCluster) CreatePod(ctx context.Context, pod *v13.Pod) (*v13.Pod, error)

CreatePod is a helper to create a pod.

func (*TestCluster) CreateService 

func (t *TestCluster) CreateService(ctx context.Context, service *v13.Service) (*v13.Service, error)

CreateService is a helper method to create a service in a cluster.

func (*TestCluster) DeleteDaemonset 

func (t *TestCluster) DeleteDaemonset(ctx context.Context, ds *appsv1.DaemonSet) error

DeleteDaemonset deletes a daemonset from this cluster.

func (*TestCluster) DeletePersistentVolume 

func (t *TestCluster) DeletePersistentVolume(ctx context.Context, volume *v13.PersistentVolumeClaim) error

DeletePersistentVolume deletes a persistent volume.

func (*TestCluster) DeletePod 

func (t *TestCluster) DeletePod(ctx context.Context, pod *v13.Pod) error

DeletePod is a helper method to delete a pod.

func (*TestCluster) DeleteService 

func (t *TestCluster) DeleteService(ctx context.Context, service *v13.Service) error

DeleteService is a helper to delete a given service.

func (*TestCluster) GetGVisorRuntimeLabelMap 

func (t *TestCluster) GetGVisorRuntimeLabelMap() map[string]string

GetGVisorRuntimeLabelMap returns the gVisor runtime key-value pair used on gVisor-runtime-enabled nodes.

func (*TestCluster) GetGVisorRuntimeToleration 

func (t *TestCluster) GetGVisorRuntimeToleration() v13.Toleration

GetGVisorRuntimeToleration returns a pod scheduling toleration that allows the pod to schedule on gVisor-runtime-enabled nodes.

func (*TestCluster) GetLogReader 

func (t *TestCluster) GetLogReader(ctx context.Context, pod *v13.Pod, opts v13.PodLogOptions) (io.ReadCloser, error)

GetLogReader gets an io.ReadCloser from which logs can be read. It is the caller's responsibility to close it.

func (*TestCluster) GetName 

func (t *TestCluster) GetName() string

GetName returns this cluster's name.

func (*TestCluster) GetPod 

func (t *TestCluster) GetPod(ctx context.Context, pod *v13.Pod) (*v13.Pod, error)

GetPod is a helper method to Get a pod's metadata.

func (*TestCluster) GetPodsInDaemonSet 

func (t *TestCluster) GetPodsInDaemonSet(ctx context.Context, ds *appsv1.DaemonSet) ([]v13.Pod, error)

GetPodsInDaemonSet returns the list of pods of the given DaemonSet.

func (*TestCluster) HasGVisorTestRuntime 

func (t *TestCluster) HasGVisorTestRuntime(ctx context.Context) (bool, error)

HasGVisorTestRuntime returns whether the test nodes in this cluster use the gVisor runtime.

func (*TestCluster) ListNodes 

func (t *TestCluster) ListNodes(ctx context.Context) (*v13.NodeList, error)

ListNodes is a helper method to list nodes in a cluster.

func (*TestCluster) ListPods 

func (t *TestCluster) ListPods(ctx context.Context, namespace string) (*v13.PodList, error)

ListPods is a helper method to List pods in a cluster.

func (*TestCluster) ListServices 

func (t *TestCluster) ListServices(ctx context.Context, namespace string) (*v13.ServiceList, error)

ListServices is a helper method to List services in a cluster.

func (*TestCluster) Namespace 

func (t *TestCluster) Namespace(namespace string) *Namespace

Namespace returns a new namespace in this cluster.

func (*TestCluster) OverrideTestNodepoolRuntime 

func (t *TestCluster) OverrideTestNodepoolRuntime(testRuntime RuntimeType)

OverrideTestNodepoolRuntime overrides the runtime used for pods running on the test nodepool. If unset, the test nodepool's default runtime is used.

func (*TestCluster) ReadPodLogs 

func (t *TestCluster) ReadPodLogs(ctx context.Context, pod *v13.Pod) (string, error)

ReadPodLogs reads logs from a pod.

func (*TestCluster) RuntimeTestNodepoolIsARM 

func (t *TestCluster) RuntimeTestNodepoolIsARM() bool

RuntimeTestNodepoolIsARM returns true if the runtime undertest nodepool is an ARM nodepool.

func (*TestCluster) StreamDaemonSetLogs 

func (t *TestCluster) StreamDaemonSetLogs(ctx context.Context, ds *appsv1.DaemonSet, opts v13.PodLogOptions, fn func(context.Context, v13.Pod, io.ReadCloser) error) error

StreamDaemonSetLogs streams the contents of a container from the given DaemonSet. The callback function is called once per node that the DaemonSet schedules on, with the reader corresponding to that node. The callback function is expected to close the reader. StreamDaemonSetLogs returns once the DaemonSet is ready everywhere that it is meant to be scheduled.

func (*TestCluster) WaitForDaemonset 

func (t *TestCluster) WaitForDaemonset(ctx context.Context, ds *appsv1.DaemonSet) error

WaitForDaemonset waits until a daemonset has propagated containers across the affected nodes.

func (*TestCluster) WaitForPodCompleted 

func (t *TestCluster) WaitForPodCompleted(ctx context.Context, pod *v13.Pod) error

WaitForPodCompleted is a helper method to wait for a pod to be completed.

func (*TestCluster) WaitForPodRunning 

func (t *TestCluster) WaitForPodRunning(ctx context.Context, pod *v13.Pod) error

WaitForPodRunning is a helper method to wait for a pod to be running.

func (*TestCluster) WaitForServiceReady 

func (t *TestCluster) WaitForServiceReady(ctx context.Context, service *v13.Service) error

WaitForServiceReady waits until a service is ready.

Source Files

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