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knative_client.go
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/
knative_client.go
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package service
import (
"context"
"encoding/json"
"fmt"
"io"
"strings"
"github.com/direktiv/direktiv/pkg/refactor/core"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/kubernetes"
servingv1 "knative.dev/serving/pkg/apis/serving/v1"
"knative.dev/serving/pkg/client/clientset/versioned"
)
const annotationNamespace = "direktiv.io/namespace"
type knativeClient struct {
config *core.Config
k8sCli *kubernetes.Clientset
knativeCli versioned.Interface
}
func (c *knativeClient) streamServiceLogs(_ string, podID string) (io.ReadCloser, error) {
req := c.k8sCli.CoreV1().Pods(c.config.KnativeNamespace).GetLogs(podID, &v1.PodLogOptions{
Container: "direktiv-container",
Follow: true,
})
logsStream, err := req.Stream(context.Background())
if err != nil {
return nil, err
}
return logsStream, nil
}
func (c *knativeClient) createService(sv *core.ServiceFileData) error {
// Step1: prepare registry secrets
var registrySecrets []v1.LocalObjectReference
secrets, err := c.k8sCli.CoreV1().Secrets(c.config.KnativeNamespace).
List(context.Background(),
metav1.ListOptions{LabelSelector: fmt.Sprintf("%s=%s", annotationNamespace, sv.Namespace)})
if err != nil {
return err
}
for _, s := range secrets.Items {
registrySecrets = append(registrySecrets, v1.LocalObjectReference{
Name: s.Name,
})
}
// Step2: build service object
svcDef, err := buildService(c.config, sv, registrySecrets)
if err != nil {
return err
}
_, err = c.knativeCli.ServingV1().Services(c.config.KnativeNamespace).Create(context.Background(), svcDef, metav1.CreateOptions{})
if err != nil {
return err
}
err = c.applyPatch(sv)
if err != nil {
return fmt.Errorf("applying patch: %w", err)
}
return nil
}
func (c *knativeClient) applyPatch(sv *core.ServiceFileData) error {
pathWhiteList := []string{
"/spec/template/metadata/labels",
"/spec/template/metadata/annotations",
"/spec/template/spec/affinity",
"/spec/template/spec/securityContext",
"/spec/template/spec/containers/0",
}
// check patch whitelist paths.
for i := range sv.Patches {
patch := sv.Patches[i]
hasAllowedPrefix := false
for a := range pathWhiteList {
prefix := pathWhiteList[a]
if strings.HasPrefix(patch.Path, prefix) {
hasAllowedPrefix = true
break
}
}
// if the path is not in the allowed prefix list, return with an error.
if !hasAllowedPrefix {
return fmt.Errorf("path %s is not permitted for patches", patch.Path)
}
}
patchBytes, err := json.Marshal(sv.Patches)
if err != nil {
return fmt.Errorf("marshalling patch: %w", err)
}
_, err = c.knativeCli.ServingV1().Services(c.config.KnativeNamespace).Patch(context.Background(), sv.GetID(), types.JSONPatchType, patchBytes, metav1.PatchOptions{})
if err != nil {
return fmt.Errorf("applying patch: %w", err)
}
return nil
}
func (c *knativeClient) updateService(sv *core.ServiceFileData) error {
// Updating knative service is basically done by removing the old one and re-creating it.
err := c.deleteService(sv.GetID())
if err != nil {
return err
}
return c.createService(sv)
}
func (c *knativeClient) deleteService(id string) error {
err := c.knativeCli.ServingV1().Services(c.config.KnativeNamespace).Delete(context.Background(), id, metav1.DeleteOptions{})
if err != nil {
return err
}
return nil
}
func (c *knativeClient) listServices() ([]status, error) {
list, err := c.knativeCli.ServingV1().Services(c.config.KnativeNamespace).List(context.Background(), metav1.ListOptions{})
if err != nil {
return nil, err
}
result := []status{}
for i := range list.Items {
result = append(result, &knativeStatus{&list.Items[i]})
}
return result, nil
}
func (c *knativeClient) listServicePods(id string) (any, error) {
lo := metav1.ListOptions{}
l, err := c.k8sCli.CoreV1().Pods(c.config.KnativeNamespace).List(context.Background(), lo)
if err != nil {
return nil, err
}
type pod struct {
ID string `json:"id"`
}
pods := []*pod{}
for i := range l.Items {
if l.Items[i].Labels["serving.knative.dev/service"] != id {
continue
}
pods = append(pods, &pod{
ID: l.Items[i].Name,
})
}
return pods, nil
}
func (c *knativeClient) rebuildService(id string) error {
return c.knativeCli.ServingV1().Services(c.config.KnativeNamespace).Delete(context.Background(), id,
metav1.DeleteOptions{})
}
var _ runtimeClient = &knativeClient{}
type knativeStatus struct {
*servingv1.Service
}
func (r *knativeStatus) GetConditions() any {
type condition struct {
Type string `json:"type"`
Status string `json:"status"`
Message string `json:"message"`
}
list := []condition{}
for _, c := range r.Status.Conditions {
list = append(list, condition{
Type: string(c.Type),
Status: string(c.Status),
Message: c.Message,
})
}
return list
}
func (r *knativeStatus) GetID() string {
return r.Name
}
func (r *knativeStatus) GetValueHash() string {
return r.Annotations["direktiv.io/inputHash"]
}
var _ status = &knativeStatus{}