103 lines
3.4 KiB
Go
103 lines
3.4 KiB
Go
/*
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Copyright 2022 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package version implements version handling code.
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package version
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import (
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"fmt"
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"runtime"
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"github.com/pkg/errors"
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utilversion "k8s.io/apimachinery/pkg/util/version"
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"k8s.io/client-go/discovery"
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"k8s.io/client-go/rest"
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)
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const (
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// MinimumKubernetesVersion defines the minimum Kubernetes version that can be used in a Management Cluster.
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MinimumKubernetesVersion = "v1.20.0"
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// MinimumKubernetesVersionClusterTopology defines the minimum Kubernetes version that can be used in a
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// Management Cluster when enabling the ClusterTopology feature gate.
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MinimumKubernetesVersionClusterTopology = "v1.22.0"
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)
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// CheckKubernetesVersion return an error if the Kubernetes version in a cluster
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// is lower than the specified minK8sVersion.
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func CheckKubernetesVersion(config *rest.Config, minK8sVersion string) error {
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client := discovery.NewDiscoveryClientForConfigOrDie(config)
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serverVersion, err := client.ServerVersion()
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if err != nil {
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return errors.Wrap(err, "failed to get the Kubernetes version")
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}
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compareResult, err := utilversion.MustParseGeneric(serverVersion.String()).Compare(minK8sVersion)
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if err != nil {
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return errors.Wrap(err, "failed to check MinK8sVersion")
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}
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if compareResult == -1 {
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return errors.Errorf("unsupported management cluster server version: %s - minimum required version is %s",
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serverVersion.String(), minK8sVersion)
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}
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return nil
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}
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var (
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gitMajor string // major version, always numeric
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gitMinor string // minor version, numeric possibly followed by "+"
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gitVersion string // semantic version, derived by build scripts
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gitCommit string // sha1 from git, output of $(git rev-parse HEAD)
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gitTreeState string // state of git tree, either "clean" or "dirty"
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buildDate string // build date in ISO8601 format, output of $(date -u +'%Y-%m-%dT%H:%M:%SZ')
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)
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// Info exposes information about the version used for the current running code.
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type Info struct {
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Major string `json:"major,omitempty"`
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Minor string `json:"minor,omitempty"`
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GitVersion string `json:"gitVersion,omitempty"`
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GitCommit string `json:"gitCommit,omitempty"`
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GitTreeState string `json:"gitTreeState,omitempty"`
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BuildDate string `json:"buildDate,omitempty"`
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GoVersion string `json:"goVersion,omitempty"`
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Compiler string `json:"compiler,omitempty"`
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Platform string `json:"platform,omitempty"`
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}
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// Get returns an Info object with all the information about the current running code.
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func Get() Info {
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return Info{
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Major: gitMajor,
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Minor: gitMinor,
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GitVersion: gitVersion,
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GitCommit: gitCommit,
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GitTreeState: gitTreeState,
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BuildDate: buildDate,
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GoVersion: runtime.Version(),
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Compiler: runtime.Compiler,
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Platform: fmt.Sprintf("%s/%s", runtime.GOOS, runtime.GOARCH),
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}
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}
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// String returns info as a human-friendly version string.
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func (info Info) String() string {
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return info.GitVersion
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}
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