forked from kubernetes/kops
/
addons.go
119 lines (98 loc) · 3 KB
/
addons.go
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/*
Copyright 2016 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package channels
import (
"fmt"
"net/url"
"strings"
"github.com/blang/semver"
"github.com/golang/glog"
"k8s.io/kops/channels/pkg/api"
"k8s.io/kops/upup/pkg/fi/utils"
"k8s.io/kops/util/pkg/vfs"
)
type Addons struct {
ChannelName string
ChannelLocation url.URL
APIObject *api.Addons
}
func LoadAddons(name string, location *url.URL) (*Addons, error) {
glog.V(2).Infof("Loading addons channel from %q", location)
data, err := vfs.Context.ReadFile(location.String())
if err != nil {
return nil, fmt.Errorf("error reading addons from %q: %v", location, err)
}
return ParseAddons(name, location, data)
}
func ParseAddons(name string, location *url.URL, data []byte) (*Addons, error) {
// Yaml can't parse empty strings
configString := string(data)
configString = strings.TrimSpace(configString)
apiObject := &api.Addons{}
if configString != "" {
err := utils.YamlUnmarshal([]byte(configString), apiObject)
if err != nil {
return nil, fmt.Errorf("error parsing addons: %v", err)
}
}
return &Addons{ChannelName: name, ChannelLocation: *location, APIObject: apiObject}, nil
}
func (a *Addons) GetCurrent(kubernetesVersion semver.Version) (*AddonMenu, error) {
all, err := a.wrapInAddons()
if err != nil {
return nil, err
}
menu := NewAddonMenu()
for _, addon := range all {
if !addon.matches(kubernetesVersion) {
continue
}
name := addon.Name
existing := menu.Addons[name]
if existing == nil || addon.ChannelVersion().replaces(existing.ChannelVersion()) {
menu.Addons[name] = addon
}
}
return menu, nil
}
func (a *Addons) wrapInAddons() ([]*Addon, error) {
var addons []*Addon
for _, s := range a.APIObject.Spec.Addons {
name := a.APIObject.ObjectMeta.Name
if s.Name != nil {
name = *s.Name
}
addon := &Addon{
ChannelName: a.ChannelName,
ChannelLocation: a.ChannelLocation,
Spec: s,
Name: name,
}
addons = append(addons, addon)
}
return addons, nil
}
func (s *Addon) matches(kubernetesVersion semver.Version) bool {
if s.Spec.KubernetesVersion != "" {
versionRange, err := semver.ParseRange(s.Spec.KubernetesVersion)
if err != nil {
glog.Warningf("unable to parse KubernetesVersion %q; skipping", s.Spec.KubernetesVersion)
return false
}
if !versionRange(kubernetesVersion) {
glog.V(4).Infof("Skipping version range %q that does not match current version %s", s.Spec.KubernetesVersion, kubernetesVersion)
return false
}
}
return true
}