Add glide.yaml and vendor deps

vendor/k8s.io/kubernetes/pkg/kubelet/rkt/version.go

@@ -0,0 +1,135 @@
+/*
+Copyright 2015 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 rkt
+
+import (
+	"fmt"
+	"sync"
+
+	"github.com/coreos/go-semver/semver"
+	rktapi "github.com/coreos/rkt/api/v1alpha"
+	"golang.org/x/net/context"
+)
+
+type versions struct {
+	sync.RWMutex
+	binVersion     rktVersion
+	apiVersion     rktVersion
+	systemdVersion systemdVersion
+}
+
+// rktVersion implementes kubecontainer.Version interface by implementing
+// Compare() and String() (which is implemented by the underlying semver.Version)
+type rktVersion struct {
+	*semver.Version
+}
+
+func newRktVersion(version string) (rktVersion, error) {
+	sem, err := semver.NewVersion(version)
+	if err != nil {
+		return rktVersion{}, err
+	}
+	return rktVersion{sem}, nil
+}
+
+func (r rktVersion) Compare(other string) (int, error) {
+	v, err := semver.NewVersion(other)
+	if err != nil {
+		return -1, err
+	}
+
+	if r.LessThan(*v) {
+		return -1, nil
+	}
+	if v.LessThan(*r.Version) {
+		return 1, nil
+	}
+	return 0, nil
+}
+
+func (r *Runtime) getVersions() error {
+	r.versions.Lock()
+	defer r.versions.Unlock()
+
+	// Get systemd version.
+	var err error
+	r.versions.systemdVersion, err = r.systemd.Version()
+	if err != nil {
+		return err
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), r.requestTimeout)
+	defer cancel()
+	// Example for the version strings returned by GetInfo():
+	// RktVersion:"0.10.0+gitb7349b1" AppcVersion:"0.7.1" ApiVersion:"1.0.0-alpha"
+	resp, err := r.apisvc.GetInfo(ctx, &rktapi.GetInfoRequest{})
+	if err != nil {
+		return err
+	}
+
+	// Get rkt binary version.
+	r.versions.binVersion, err = newRktVersion(resp.Info.RktVersion)
+	if err != nil {
+		return err
+	}
+
+	// Get rkt API version.
+	r.versions.apiVersion, err = newRktVersion(resp.Info.ApiVersion)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// checkVersion tests whether the rkt/systemd/rkt-api-service that meet the version requirement.
+// If all version requirements are met, it returns nil.
+func (r *Runtime) checkVersion(minimumRktBinVersion, minimumRktApiVersion, minimumSystemdVersion string) error {
+	if err := r.getVersions(); err != nil {
+		return err
+	}
+
+	r.versions.RLock()
+	defer r.versions.RUnlock()
+
+	// Check systemd version.
+	result, err := r.versions.systemdVersion.Compare(minimumSystemdVersion)
+	if err != nil {
+		return err
+	}
+	if result < 0 {
+		return fmt.Errorf("rkt: systemd version(%v) is too old, requires at least %v", r.versions.systemdVersion, minimumSystemdVersion)
+	}
+
+	// Check rkt binary version.
+	result, err = r.versions.binVersion.Compare(minimumRktBinVersion)
+	if err != nil {
+		return err
+	}
+	if result < 0 {
+		return fmt.Errorf("rkt: binary version is too old(%v), requires at least %v", r.versions.binVersion, minimumRktBinVersion)
+	}
+
+	// Check rkt API version.
+	result, err = r.versions.apiVersion.Compare(minimumRktApiVersion)
+	if err != nil {
+		return err
+	}
+	if result < 0 {
+		return fmt.Errorf("rkt: API version is too old(%v), requires at least %v", r.versions.apiVersion, minimumRktApiVersion)
+	}
+	return nil
+}