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upgrade.go
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upgrade.go
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
package cmd
import (
"context"
"fmt"
"os"
"path/filepath"
"time"
"github.com/Azure/aks-engine/pkg/api"
"github.com/Azure/aks-engine/pkg/armhelpers"
"github.com/Azure/aks-engine/pkg/engine"
"github.com/Azure/aks-engine/pkg/helpers"
"github.com/Azure/aks-engine/pkg/i18n"
"github.com/Azure/aks-engine/pkg/operations/kubernetesupgrade"
"github.com/leonelquinteros/gotext"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
const (
upgradeName = "upgrade"
upgradeShortDescription = "Upgrade an existing Kubernetes cluster"
upgradeLongDescription = "Upgrade an existing Kubernetes cluster, one minor version at a time"
)
type upgradeCmd struct {
authProvider
// user input
resourceGroupName string
apiModelPath string
deploymentDirectory string
upgradeVersion string
location string
timeoutInMinutes int
cordonDrainTimeoutInMinutes int
force bool
// derived
containerService *api.ContainerService
apiVersion string
client armhelpers.AKSEngineClient
locale *gotext.Locale
nameSuffix string
agentPoolsToUpgrade map[string]bool
timeout *time.Duration
cordonDrainTimeout *time.Duration
}
func newUpgradeCmd() *cobra.Command {
uc := upgradeCmd{
authProvider: &authArgs{},
}
upgradeCmd := &cobra.Command{
Use: upgradeName,
Short: upgradeShortDescription,
Long: upgradeLongDescription,
RunE: uc.run,
}
f := upgradeCmd.Flags()
f.StringVarP(&uc.location, "location", "l", "", "location the cluster is deployed in (required)")
f.StringVarP(&uc.resourceGroupName, "resource-group", "g", "", "the resource group where the cluster is deployed (required)")
f.StringVarP(&uc.apiModelPath, "api-model", "m", "", "path to the generated apimodel.json file")
f.StringVar(&uc.deploymentDirectory, "deployment-dir", "", "the location of the output from `generate`")
f.StringVarP(&uc.upgradeVersion, "upgrade-version", "k", "", "desired kubernetes version (required)")
f.IntVar(&uc.timeoutInMinutes, "vm-timeout", -1, "how long to wait for each vm to be upgraded in minutes")
f.IntVar(&uc.cordonDrainTimeoutInMinutes, "cordon-drain-timeout", -1, "how long to wait for each vm to be cordoned in minutes")
f.BoolVarP(&uc.force, "force", "f", false, "force upgrading the cluster to desired version. Allows same version upgrades and downgrades.")
addAuthFlags(uc.getAuthArgs(), f)
f.MarkDeprecated("deployment-dir", "deployment-dir is no longer required for scale or upgrade. Please use --api-model.")
return upgradeCmd
}
func (uc *upgradeCmd) validate(cmd *cobra.Command) error {
var err error
uc.locale, err = i18n.LoadTranslations()
if err != nil {
return errors.Wrap(err, "error loading translation files")
}
if uc.resourceGroupName == "" {
cmd.Usage()
return errors.New("--resource-group must be specified")
}
if uc.location == "" {
cmd.Usage()
return errors.New("--location must be specified")
}
uc.location = helpers.NormalizeAzureRegion(uc.location)
if uc.timeoutInMinutes != -1 {
timeout := time.Duration(uc.timeoutInMinutes) * time.Minute
uc.timeout = &timeout
}
if uc.cordonDrainTimeoutInMinutes != -1 {
cordonDrainTimeout := time.Duration(uc.cordonDrainTimeoutInMinutes) * time.Minute
uc.cordonDrainTimeout = &cordonDrainTimeout
}
if uc.upgradeVersion == "" {
cmd.Usage()
return errors.New("--upgrade-version must be specified")
}
if uc.apiModelPath == "" && uc.deploymentDirectory == "" {
cmd.Usage()
return errors.New("--api-model must be specified")
}
if uc.apiModelPath != "" && uc.deploymentDirectory != "" {
cmd.Usage()
return errors.New("ambiguous, please specify only one of --api-model and --deployment-dir")
}
return nil
}
func (uc *upgradeCmd) loadCluster() error {
var err error
ctx, cancel := context.WithTimeout(context.Background(), armhelpers.DefaultARMOperationTimeout)
defer cancel()
// Load apimodel from the directory.
if uc.apiModelPath == "" {
uc.apiModelPath = filepath.Join(uc.deploymentDirectory, apiModelFilename)
}
if _, err = os.Stat(uc.apiModelPath); os.IsNotExist(err) {
return errors.Errorf("specified api model does not exist (%s)", uc.apiModelPath)
}
apiloader := &api.Apiloader{
Translator: &i18n.Translator{
Locale: uc.locale,
},
}
// Load the container service.
uc.containerService, uc.apiVersion, err = apiloader.LoadContainerServiceFromFile(uc.apiModelPath, true, true, nil)
if err != nil {
return errors.Wrap(err, "error parsing the api model")
}
if uc.containerService.Properties.IsAzureStackCloud() {
writeCustomCloudProfile(uc.containerService)
err = uc.containerService.Properties.SetAzureStackCloudSpec()
if err != nil {
return errors.Wrap(err, "error parsing the api model")
}
}
if err = uc.getAuthArgs().validateAuthArgs(); err != nil {
return err
}
if uc.client, err = uc.getAuthArgs().getClient(); err != nil {
return errors.Wrap(err, "failed to get client")
}
_, err = uc.client.EnsureResourceGroup(ctx, uc.resourceGroupName, uc.location, nil)
if err != nil {
return errors.Wrap(err, "error ensuring resource group")
}
err = uc.initialize()
if err != nil {
return errors.Wrap(err, "error validating the api model")
}
return nil
}
func (uc *upgradeCmd) validateTargetVersion() error {
// Get available upgrades for container service.
orchestratorInfo, err := api.GetOrchestratorVersionProfile(uc.containerService.Properties.OrchestratorProfile, uc.containerService.Properties.HasWindows())
if err != nil {
return errors.Wrap(err, "error getting list of available upgrades")
}
found := false
for _, up := range orchestratorInfo.Upgrades {
if up.OrchestratorVersion == uc.upgradeVersion {
found = true
break
}
}
if !found {
return errors.Errorf("upgrading from Kubernetes version %s to version %s is not supported. To see a list of available upgrades, use 'aks-engine get-versions --version %s'", uc.containerService.Properties.OrchestratorProfile.OrchestratorVersion, uc.upgradeVersion, uc.containerService.Properties.OrchestratorProfile.OrchestratorVersion)
}
return nil
}
func (uc *upgradeCmd) initialize() error {
if uc.containerService.Location == "" {
uc.containerService.Location = uc.location
} else if uc.containerService.Location != uc.location {
return errors.New("--location does not match api model location")
}
if !uc.force {
err := uc.validateTargetVersion()
if err != nil {
return errors.Wrap(err, "Invalid upgrade target version. Consider using --force if you really want to proceed")
}
}
uc.containerService.Properties.OrchestratorProfile.OrchestratorVersion = uc.upgradeVersion
//allows to identify VMs in the resource group that belong to this cluster.
uc.nameSuffix = uc.containerService.Properties.GetClusterID()
log.Infoln(fmt.Sprintf("Upgrading cluster with name suffix: %s", uc.nameSuffix))
uc.agentPoolsToUpgrade = make(map[string]bool)
uc.agentPoolsToUpgrade[kubernetesupgrade.MasterPoolName] = true
for _, agentPool := range uc.containerService.Properties.AgentPoolProfiles {
uc.agentPoolsToUpgrade[agentPool.Name] = true
}
return nil
}
func (uc *upgradeCmd) run(cmd *cobra.Command, args []string) error {
err := uc.validate(cmd)
if err != nil {
return errors.Wrap(err, "validating upgrade command")
}
err = uc.loadCluster()
if err != nil {
return errors.Wrap(err, "loading existing cluster")
}
upgradeCluster := kubernetesupgrade.UpgradeCluster{
Translator: &i18n.Translator{
Locale: uc.locale,
},
Logger: log.NewEntry(log.New()),
Client: uc.client,
StepTimeout: uc.timeout,
CordonDrainTimeout: uc.cordonDrainTimeout,
}
upgradeCluster.ClusterTopology = kubernetesupgrade.ClusterTopology{}
upgradeCluster.SubscriptionID = uc.getAuthArgs().SubscriptionID.String()
upgradeCluster.ResourceGroup = uc.resourceGroupName
upgradeCluster.DataModel = uc.containerService
upgradeCluster.NameSuffix = uc.nameSuffix
upgradeCluster.AgentPoolsToUpgrade = uc.agentPoolsToUpgrade
upgradeCluster.Force = uc.force
kubeConfig, err := engine.GenerateKubeConfig(uc.containerService.Properties, uc.location)
if err != nil {
return errors.Wrap(err, "generating kubeconfig")
}
if err = upgradeCluster.UpgradeCluster(uc.client, kubeConfig, BuildTag); err != nil {
return errors.Wrap(err, "upgrading cluster")
}
// Save the new apimodel to reflect the cluster's state.
apiloader := &api.Apiloader{
Translator: &i18n.Translator{
Locale: uc.locale,
},
}
b, err := apiloader.SerializeContainerService(uc.containerService, uc.apiVersion)
if err != nil {
return err
}
f := helpers.FileSaver{
Translator: &i18n.Translator{
Locale: uc.locale,
},
}
dir, file := filepath.Split(uc.apiModelPath)
return f.SaveFile(dir, file, b)
}