added k8s stub adapter for execution environment

internal/kubernetes/api_querier.go

@@ -0,0 +1,122 @@
+package kubernetes
+
+import (
+	"context"
+	"errors"
+	nomadApi "github.com/hashicorp/nomad/api"
+	"io"
+	appv1 "k8s.io/api/apps/v1"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/rest"
+)
+
+var (
+	ErrorNoAllocationFound = errors.New("no allocation found")
+)
+
+// apiQuerier provides access to the Nomad functionality.
+type apiQuerier interface {
+	// init prepares an apiClient to be able to communicate to a provided Nomad API.
+	init(nomadConfig *rest.Config) (err error)
+
+	// LoadJobList loads the list of jobs from the Nomad API.
+	LoadJobList() (list []*appv1.DeploymentList, err error)
+
+	// JobScale returns the scale of the passed job.
+	JobScale(jobID string) (jobScale uint, err error)
+
+	// SetJobScale sets the scaling count of the passed job to Nomad.
+	SetJobScale(jobID string, count uint, reason string) (err error)
+
+	// DeleteJob deletes the Job with the given ID.
+	DeleteDeployment(name string) (err error)
+
+	// Execute runs a command in the passed job.
+	Execute(jobID string, ctx context.Context, command string, tty bool,
+		stdin io.Reader, stdout, stderr io.Writer) (int, error)
+
+	// listJobs loads all jobs with the specified prefix.
+	listDeployments(namespace string) (jobListStub []*appv1.DeploymentList, err error)
+
+	// job returns the job of the given jobID.
+	deployment(name string) (deployment appv1.Deployment, err error)
+
+	// listAllocations loads all allocations.
+	listAllocations() (allocationListStub []*nomadApi.AllocationListStub, err error)
+
+	// allocation returns the first allocation of the given job.
+	allocation(jobID string) (*nomadApi.Allocation, error)
+
+	// RegisterKubernetesDeployment registers a deployment with Kubernetes.
+	// It returns the deployment ID that can be used when listening to the Kubernetes event stream.
+	RegisterKubernetesDeployment(deployment appv1.Deployment) (string, error)
+
+	// EventStream returns a Nomad event stream filtered to return only allocation and evaluation events.
+	EventStream(ctx context.Context) (<-chan *nomadApi.Events, error)
+}
+
+// nomadAPIClient implements the nomadApiQuerier interface and provides access to a real Nomad API.
+type kubernetesAPIClient struct {
+	client    *kubernetes.Clientset
+	namespace string
+}
+
+func (k kubernetesAPIClient) init(nomadConfig *rest.Config) (err error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (k kubernetesAPIClient) LoadJobList() (list []*appv1.DeploymentList, err error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (k kubernetesAPIClient) JobScale(jobID string) (jobScale uint, err error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (k kubernetesAPIClient) SetJobScale(jobID string, count uint, reason string) (err error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (k kubernetesAPIClient) DeleteDeployment(name string) (err error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (k kubernetesAPIClient) Execute(jobID string, ctx context.Context, command string, tty bool, stdin io.Reader, stdout, stderr io.Writer) (int, error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (k kubernetesAPIClient) listDeployments(namespace string) (jobListStub []*appv1.DeploymentList, err error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (k kubernetesAPIClient) deployment(name string) (deployment appv1.Deployment, err error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (k kubernetesAPIClient) listAllocations() (allocationListStub []*nomadApi.AllocationListStub, err error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (k kubernetesAPIClient) allocation(jobID string) (*nomadApi.Allocation, error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (k kubernetesAPIClient) RegisterKubernetesDeployment(deployment appv1.Deployment) (string, error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (k kubernetesAPIClient) EventStream(ctx context.Context) (<-chan *nomadApi.Events, error) {
+	//TODO implement me
+	panic("implement me")
+}