112 lines
2.9 KiB
Go
112 lines
2.9 KiB
Go
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/*
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Copyright 2015 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 rkt
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import (
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"fmt"
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"sync"
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rktapi "github.com/coreos/rkt/api/v1alpha"
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"golang.org/x/net/context"
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utilversion "k8s.io/kubernetes/pkg/util/version"
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)
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type versions struct {
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sync.RWMutex
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binVersion *utilversion.Version
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apiVersion *utilversion.Version
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systemdVersion systemdVersion
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}
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func newRktVersion(version string) (*utilversion.Version, error) {
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return utilversion.ParseSemantic(version)
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}
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func (r *Runtime) getVersions() error {
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r.versions.Lock()
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defer r.versions.Unlock()
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// Get systemd version.
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var err error
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r.versions.systemdVersion, err = r.systemd.Version()
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if err != nil {
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return err
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}
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ctx, cancel := context.WithTimeout(context.Background(), r.requestTimeout)
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defer cancel()
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// Example for the version strings returned by GetInfo():
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// RktVersion:"0.10.0+gitb7349b1" AppcVersion:"0.7.1" ApiVersion:"1.0.0-alpha"
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resp, err := r.apisvc.GetInfo(ctx, &rktapi.GetInfoRequest{})
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if err != nil {
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return err
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}
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// Get rkt binary version.
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r.versions.binVersion, err = newRktVersion(resp.Info.RktVersion)
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if err != nil {
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return err
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}
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// Get rkt API version.
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r.versions.apiVersion, err = newRktVersion(resp.Info.ApiVersion)
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if err != nil {
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return err
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}
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return nil
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}
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// checkVersion tests whether the rkt/systemd/rkt-api-service that meet the version requirement.
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// If all version requirements are met, it returns nil.
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func (r *Runtime) checkVersion(minimumRktBinVersion, minimumRktApiVersion, minimumSystemdVersion string) error {
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if err := r.getVersions(); err != nil {
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return err
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}
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r.versions.RLock()
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defer r.versions.RUnlock()
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// Check systemd version.
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result, err := r.versions.systemdVersion.Compare(minimumSystemdVersion)
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if err != nil {
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return err
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}
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if result < 0 {
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return fmt.Errorf("rkt: systemd version(%v) is too old, requires at least %v", r.versions.systemdVersion, minimumSystemdVersion)
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}
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// Check rkt binary version.
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result, err = r.versions.binVersion.Compare(minimumRktBinVersion)
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if err != nil {
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return err
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}
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if result < 0 {
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return fmt.Errorf("rkt: binary version is too old(%v), requires at least %v", r.versions.binVersion, minimumRktBinVersion)
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}
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// Check rkt API version.
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result, err = r.versions.apiVersion.Compare(minimumRktApiVersion)
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if err != nil {
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return err
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}
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if result < 0 {
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return fmt.Errorf("rkt: API version is too old(%v), requires at least %v", r.versions.apiVersion, minimumRktApiVersion)
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}
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return nil
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}
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