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platform_versioner.go
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platform_versioner.go
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package platform
import (
"context"
"encoding/json"
"errors"
openapi_v2 "github.com/google/gnostic/openapiv2"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/version"
"k8s.io/client-go/discovery"
"k8s.io/client-go/rest"
"sigs.k8s.io/controller-runtime/pkg/client/config"
logf "sigs.k8s.io/controller-runtime/pkg/log"
)
var (
log = logf.Log.WithName("utils")
clusterVersionAPIPath = "apis/config.openshift.io/v1/clusterversions/version"
)
type PlatformVersioner interface {
GetPlatformInfo(discoverer Discoverer, cfg *rest.Config) (PlatformInfo, error)
}
type Discoverer interface {
ServerVersion() (*version.Info, error)
ServerGroups() (*v1.APIGroupList, error)
OpenAPISchema() (*openapi_v2.Document, error)
RESTClient() rest.Interface
}
type K8SBasedPlatformVersioner struct{}
/*
MapKnownVersion maps from K8S version of PlatformInfo to equivalent OpenShift version
Result: OpenShiftVersion{ Version: 4.1.2 }
*/
func MapKnownVersion(info PlatformInfo) OpenShiftVersion {
k8sToOcpMap := map[string]string{
"1.10+": "3.10",
"1.10": "3.10",
"1.11+": "3.11",
"1.11": "3.11",
"1.13+": "4.1",
"1.13": "4.1",
"1.14+": "4.2",
"1.14": "4.2",
"1.16+": "4.3",
"1.16": "4.3",
"1.17+": "4.4",
"1.17": "4.4",
"1.18+": "4.5",
"1.18": "4.5",
"1.19+": "4.6",
"1.19": "4.6",
"1.20+": "4.7",
"1.20": "4.7",
"1.21+": "4.8",
"1.21": "4.8",
"1.22+": "4.9",
"1.22": "4.9",
"1.23+": "4.10",
"1.23": "4.10",
"1.24+": "4.11",
"1.24": "4.11",
"1.25+": "4.12",
"1.25": "4.12",
"1.26+": "4.13",
"1.26": "4.13",
}
return OpenShiftVersion{Version: k8sToOcpMap[info.K8SVersion]}
}
// deal with cfg coming from legacy method signature and allow injection for client testing
func (K8SBasedPlatformVersioner) DefaultArgs(client Discoverer, cfg *rest.Config) (Discoverer, *rest.Config, error) {
if cfg == nil {
var err error
cfg, err = config.GetConfig()
if err != nil {
return nil, nil, err
}
}
if client == nil {
var err error
client, err = discovery.NewDiscoveryClientForConfig(cfg)
if err != nil {
return nil, nil, err
}
}
return client, cfg, nil
}
func (pv K8SBasedPlatformVersioner) GetPlatformInfo(client Discoverer, cfg *rest.Config) (PlatformInfo, error) {
log.Info("detecting platform version...")
info := PlatformInfo{Name: Kubernetes}
var err error
client, cfg, err = pv.DefaultArgs(client, cfg)
if err != nil {
log.Info("issue occurred while defaulting client/cfg args")
return info, err
}
k8sVersion, err := client.ServerVersion()
if err != nil {
log.Info("issue occurred while fetching ServerVersion")
return info, err
}
info.K8SVersion = k8sVersion.Major + "." + k8sVersion.Minor
info.OS = k8sVersion.Platform
apiList, err := client.ServerGroups()
if err != nil {
log.Info("issue occurred while fetching ServerGroups")
return info, err
}
for _, v := range apiList.Groups {
if v.Name == "route.openshift.io" {
log.Info("route.openshift.io found in apis, platform is OpenShift")
info.Name = OpenShift
break
}
}
log.Info(info.String())
return info, nil
}
/*
OCP4.1+ requires elevated cluster configuration user security permissions for version fetch
REST call URL requiring permissions: /apis/config.openshift.io/v1/clusterversions
*/
func (pv K8SBasedPlatformVersioner) LookupOpenShiftVersion(client Discoverer, cfg *rest.Config) (OpenShiftVersion, error) {
osv := OpenShiftVersion{}
client, _, err := pv.DefaultArgs(nil, nil)
if err != nil {
log.Info("issue occurred while defaulting args for version lookup")
return osv, err
}
doc, err := client.OpenAPISchema()
if err != nil {
log.Info("issue occurred while fetching OpenAPISchema")
return osv, err
}
switch doc.Info.Version[:4] {
case "v3.1":
osv.Version = doc.Info.Version
// OCP4 returns K8S major/minor from old API endpoint [bugzilla-1658957]
case "v1.1":
rest := client.RESTClient().Get().AbsPath(clusterVersionAPIPath)
result := rest.Do(context.TODO())
if result.Error() != nil {
log.Info("issue making API version rest call: " + result.Error().Error())
return osv, result.Error()
}
// error handling before/after Raw() seems redundant, but error detail can be lost in convert
body, err := result.Raw()
if err != nil {
log.Info("issue pulling raw result from API call")
return osv, err
}
var cvi PlatformClusterInfo
err = json.Unmarshal(body, &cvi)
if err != nil {
log.Info("issue occurred while unmarshalling PlatformClusterInfo")
return osv, err
}
osv.Version = cvi.Status.Desired.Version
}
return osv, nil
}
func (pv K8SBasedPlatformVersioner) CompareOpenShiftVersion(client Discoverer, cfg *rest.Config, version string) (int, error) {
info, err := pv.GetPlatformInfo(client, cfg)
if err != nil {
return -1, err
}
if !info.IsOpenShift() {
return -1, errors.New("There is no OpenShift platform detected.")
}
curVersion := MapKnownVersion(info)
return curVersion.Compare(OpenShiftVersion{Version: version})
}