forked from kubernetes/kops
/
addon.go
100 lines (84 loc) · 2.29 KB
/
addon.go
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package channels
import (
"fmt"
"github.com/golang/glog"
"k8s.io/kops/channels/pkg/api"
"k8s.io/kubernetes/pkg/client/clientset_generated/release_1_3"
"k8s.io/kubernetes/pkg/util/validation/field"
"net/url"
)
type Addon struct {
Name string
ChannelName string
ChannelLocation url.URL
Spec *api.AddonSpec
}
type AddonUpdate struct {
Name string
ExistingVersion *ChannelVersion
NewVersion *ChannelVersion
}
func (a *Addon) ChannelVersion() *ChannelVersion {
return &ChannelVersion{
Channel: &a.ChannelName,
Version: a.Spec.Version,
}
}
func (a *Addon) buildChannel() *Channel {
namespace := "kube-system"
if a.Spec.Namespace != nil {
namespace = *a.Spec.Namespace
}
channel := &Channel{
Namespace: namespace,
Name: a.Name,
}
return channel
}
func (a *Addon) GetRequiredUpdates(k8sClient *release_1_3.Clientset) (*AddonUpdate, error) {
newVersion := a.ChannelVersion()
channel := a.buildChannel()
existingVersion, err := channel.GetInstalledVersion(k8sClient)
if err != nil {
return nil, err
}
if existingVersion != nil && !newVersion.Replaces(existingVersion) {
return nil, nil
}
return &AddonUpdate{
Name: a.Name,
ExistingVersion: existingVersion,
NewVersion: newVersion,
}, nil
}
func (a *Addon) EnsureUpdated(k8sClient *release_1_3.Clientset) (*AddonUpdate, error) {
required, err := a.GetRequiredUpdates(k8sClient)
if err != nil {
return nil, err
}
if required == nil {
return nil, nil
}
if a.Spec.Manifest == nil || *a.Spec.Manifest == "" {
return nil, field.Required(field.NewPath("Spec", "Manifest"), "")
}
manifest := *a.Spec.Manifest
manifestURL, err := url.Parse(manifest)
if err != nil {
return nil, field.Invalid(field.NewPath("Spec", "Manifest"), manifest, "Not a valid URL")
}
if !manifestURL.IsAbs() {
manifestURL = a.ChannelLocation.ResolveReference(manifestURL)
}
glog.Infof("Applying update from %q", manifestURL)
err = Apply(manifestURL.String())
if err != nil {
return nil, fmt.Errorf("error applying update from %q: %v", manifest, err)
}
channel := a.buildChannel()
err = channel.SetInstalledVersion(k8sClient, a.ChannelVersion())
if err != nil {
return nil, fmt.Errorf("error applying annotation to to record addon installation: %v", err)
}
return required, nil
}