mirror of https://github.com/knative/pkg.git
56 lines
1.7 KiB
Go
56 lines
1.7 KiB
Go
/*
|
|
Copyright 2019 The Knative 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 version
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/rogpeppe/go-internal/semver"
|
|
"k8s.io/apimachinery/pkg/version"
|
|
)
|
|
|
|
// ServerVersioner is an interface to mock the `ServerVersion`
|
|
// method of the Kubernetes client's Discovery interface.
|
|
// In an application `kubeClient.Discovery()` can be used to
|
|
// suffice this interface.
|
|
type ServerVersioner interface {
|
|
ServerVersion() (*version.Info, error)
|
|
}
|
|
|
|
var minimumVersion = "v1.11.0"
|
|
|
|
// CheckMinimumVersion checks if the currently installed version of
|
|
// Kubernetes is compatible with the minimum version required.
|
|
// Returns an error if its not.
|
|
//
|
|
// A Kubernetes discovery client can be passed in as the versioner
|
|
// like `CheckMinimumVersion(kubeClient.Discovery())`.
|
|
func CheckMinimumVersion(versioner ServerVersioner) error {
|
|
v, err := versioner.ServerVersion()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
currentVersion := semver.Canonical(v.String())
|
|
|
|
// Compare returns 1 if the first version is greater than the
|
|
// second version.
|
|
if semver.Compare(minimumVersion, currentVersion) == 1 {
|
|
return fmt.Errorf("kubernetes version %q is not compatible, need at least %q", currentVersion, minimumVersion)
|
|
}
|
|
return nil
|
|
}
|