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kubernetes.go
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kubernetes.go
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package runner
import (
"context"
"fmt"
v1 "github.com/open-integration/oi/pkg/api/v1"
"github.com/open-integration/oi/pkg/logger"
"github.com/open-integration/oi/pkg/utils"
"google.golang.org/grpc"
apiv1 "k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes"
)
const (
defaultPort = "8080"
)
type (
kubernetesService struct {
Logger logger.Logger
name string
id string
version string
kubeconfigPath string
kubeconfigContext string
kubeconfigNamespace string
kubeconfigHost string
kubeconfigB64Crt string
kubeconfigToken string
kubeVolumeName string
kubeVolumeClaimName string
kube kube
kubeclient *kubernetes.Clientset
dialer dialer
connection *grpc.ClientConn
serviceClientCreator serviceClientCreator
client v1.ServiceClient
tasksSchemas map[string]string
portGenerator portGenerator
port string
hostname string
grpcDialViaPodIP bool
logsDirectory string
}
kube interface {
BuildClient(utils.BuildKubeClientOptions) (*kubernetes.Clientset, error)
BuildPodDefinition(namespace string, name string, version string, id string, port string, volume string, volumeClaimName string, volumeMoutnPath string) (*apiv1.Pod, error)
BuildServiceDefinition(namespace string, name string, id string, port string, serviceType string) (*apiv1.Service, error)
CreatePod(client *kubernetes.Clientset, def *apiv1.Pod) (*apiv1.Pod, error)
WaitForPod(client *kubernetes.Clientset, pod *apiv1.Pod, phase string) error
CreateService(client *kubernetes.Clientset, def *apiv1.Service) (*apiv1.Service, error)
KillService(client *kubernetes.Clientset, namespace string, name string) error
KillPod(client *kubernetes.Clientset, namespace string, name string) error
}
)
func (_k *kubernetesService) Run() error {
client, err := _k.kube.BuildClient(utils.BuildKubeClientOptions{
KubeconfigPath: _k.kubeconfigPath,
})
if err != nil {
return err
}
_k.kubeclient = client
_k.Logger.Debug("Starting Kuberentes runner service-less")
if err := _k.startService(); err != nil {
return err
}
if err := _k.startPod(); err != nil {
return err
}
if err := _k.dail(); err != nil {
return err
}
if err := _k.init(); err != nil {
return err
}
return nil
}
func (_k *kubernetesService) Kill() error {
name := fmt.Sprintf("%s-%s", _k.name, _k.id)
if err := _k.kube.KillService(_k.kubeclient, _k.kubeconfigNamespace, name); err != nil {
_k.Logger.Warn("Failed to delete kubernetes service", "service", name, "error", err.Error())
}
if err := _k.kube.KillPod(_k.kubeclient, _k.kubeconfigNamespace, name); err != nil {
_k.Logger.Warn("Failed to delete kubernetes pod", "pod", name, "error", err.Error())
}
return nil
}
func (_k *kubernetesService) Call(context context.Context, req *v1.CallRequest) (*v1.CallResponse, error) {
return _k.client.Call(context, req)
}
func (_k *kubernetesService) Schemas() map[string]string {
return _k.tasksSchemas
}
func (_k *kubernetesService) startService() error {
port, err := _k.portGenerator.GetAvailable()
if err != nil {
return err
}
_k.port = port
serviceType := ""
if !_k.grpcDialViaPodIP {
serviceType = "LoadBalancer"
}
svcDef, err := _k.kube.BuildServiceDefinition(_k.kubeconfigNamespace, _k.name, _k.id, port, serviceType)
if err != nil {
return err
}
createdSvc, err := _k.kube.CreateService(_k.kubeclient, svcDef)
if err != nil {
return err
}
_k.Logger.Debug("Kubernetes Service created", "name", createdSvc.ObjectMeta.Name)
return nil
}
func (_k *kubernetesService) startPod() error {
podDef, err := _k.kube.BuildPodDefinition(_k.kubeconfigNamespace, _k.name, _k.version, _k.id, defaultPort, _k.kubeVolumeName, _k.kubeVolumeClaimName, _k.logsDirectory)
if err != nil {
return err
}
createdPod, err := _k.kube.CreatePod(_k.kubeclient, podDef)
if err != nil {
return err
}
_k.Logger.Debug("Pod created", "name", createdPod.ObjectMeta.Name)
if err := _k.kube.WaitForPod(_k.kubeclient, createdPod, "Running"); err != nil {
return err
}
_k.Logger.Debug("Pod is ready", "name", createdPod.ObjectMeta.Name)
// the target port is the default that the pod was started with
if _k.grpcDialViaPodIP {
_k.Logger.Debug("Updating dial options", "name", createdPod.ObjectMeta.Name, "port", _k.port, "hostname", _k.name)
_k.hostname = fmt.Sprintf("%s-%s", _k.name, _k.id)
}
return nil
}
func (_k *kubernetesService) dail() error {
url := fmt.Sprintf("%s:%s", _k.hostname, _k.port)
_k.Logger.Debug("Dial to service", "URL", url)
conn, err := _k.dialer.Dial(url, grpc.WithInsecure())
if err != nil {
return err
}
_k.connection = conn
_k.client = _k.serviceClientCreator.New(conn)
_k.Logger.Debug("Connection established")
return nil
}
func (_k *kubernetesService) init() error {
_k.Logger.Debug("Calling service init endpoint one time")
resp, err := _k.client.Init(context.Background(), &v1.InitRequest{})
if err != nil {
return err
}
_k.tasksSchemas = resp.JsonSchemas
return nil
}