forked from kubernetes/kops
/
upgrade_cluster.go
273 lines (233 loc) · 6.56 KB
/
upgrade_cluster.go
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package main
import (
"fmt"
"github.com/golang/glog"
"github.com/spf13/cobra"
"k8s.io/kops/upup/pkg/api"
"k8s.io/kops/upup/pkg/fi"
"k8s.io/kops/upup/pkg/fi/cloudup"
"k8s.io/kops/util/pkg/tables"
"os"
)
type UpgradeClusterCmd struct {
Yes bool
Channel string
}
var upgradeCluster UpgradeClusterCmd
func init() {
cmd := &cobra.Command{
Use: "cluster",
Short: "Upgrade cluster",
Long: `Upgrades a k8s cluster.`,
Run: func(cmd *cobra.Command, args []string) {
err := upgradeCluster.Run(args)
if err != nil {
exitWithError(err)
}
},
}
cmd.Flags().BoolVar(&upgradeCluster.Yes, "yes", false, "Apply update")
cmd.Flags().StringVar(&upgradeCluster.Channel, "channel", "", "Channel to use for upgrade")
upgradeCmd.AddCommand(cmd)
}
type upgradeAction struct {
Item string
Property string
Old string
New string
apply func()
}
func (c *UpgradeClusterCmd) Run(args []string) error {
err := rootCommand.ProcessArgs(args)
if err != nil {
return err
}
clusterRegistry, cluster, err := rootCommand.Cluster()
if err != nil {
return err
}
instanceGroupRegistry, err := rootCommand.InstanceGroupRegistry()
if err != nil {
return err
}
instanceGroups, err := instanceGroupRegistry.ReadAll()
if cluster.Annotations[api.AnnotationNameManagement] == api.AnnotationValueManagementImported {
return fmt.Errorf("upgrade is not for use with imported clusters (did you mean `kops toolbox convert-imported`?)")
}
channelLocation := c.Channel
if channelLocation == "" {
channelLocation = cluster.Spec.Channel
}
if channelLocation == "" {
channelLocation = api.DefaultChannel
}
var actions []*upgradeAction
if channelLocation != cluster.Spec.Channel {
actions = append(actions, &upgradeAction{
Item: "Cluster",
Property: "Channel",
Old: cluster.Spec.Channel,
New: channelLocation,
apply: func() {
cluster.Spec.Channel = channelLocation
},
})
}
channel, err := api.LoadChannel(channelLocation)
if err != nil {
return fmt.Errorf("error loading channel %q: %v", channelLocation, err)
}
channelClusterSpec := channel.Spec.Cluster
if channelClusterSpec == nil {
// Just to prevent too much nil handling
channelClusterSpec = &api.ClusterSpec{}
}
//latestKubernetesVersion, err := api.FindLatestKubernetesVersion()
//if err != nil {
// return err
//}
if channelClusterSpec.KubernetesVersion != "" && cluster.Spec.KubernetesVersion != channelClusterSpec.KubernetesVersion {
actions = append(actions, &upgradeAction{
Item: "Cluster",
Property: "KubernetesVersion",
Old: cluster.Spec.KubernetesVersion,
New: channelClusterSpec.KubernetesVersion,
apply: func() {
cluster.Spec.KubernetesVersion = channelClusterSpec.KubernetesVersion
},
})
}
// Prompt to upgrade addins?
// Prompt to upgrade to kubenet
if channelClusterSpec.Networking != nil {
clusterNetworking := cluster.Spec.Networking
if clusterNetworking == nil {
clusterNetworking = &api.NetworkingSpec{}
}
// TODO: make this less hard coded
if channelClusterSpec.Networking.Kubenet != nil && channelClusterSpec.Networking.Classic != nil {
actions = append(actions, &upgradeAction{
Item: "Cluster",
Property: "Networking",
Old: "classic",
New: "kubenet",
apply: func() {
cluster.Spec.Networking.Classic = nil
cluster.Spec.Networking.Kubenet = channelClusterSpec.Networking.Kubenet
},
})
}
}
cloud, err := cloudup.BuildCloud(cluster)
if err != nil {
return err
}
// Prompt to upgrade image
{
image := channel.FindImage(cloud.ProviderID())
if image == nil {
glog.Warningf("No matching images specified in channel; cannot prompt for upgrade")
} else {
for _, ig := range instanceGroups {
if ig.Spec.Image != image.Name {
target := ig
actions = append(actions, &upgradeAction{
Item: "InstanceGroup/" + target.Name,
Property: "Image",
Old: target.Spec.Image,
New: image.Name,
apply: func() {
target.Spec.Image = image.Name
},
})
}
}
}
}
// Prompt to upgrade to overlayfs
if channelClusterSpec.Docker != nil {
if cluster.Spec.Docker == nil {
cluster.Spec.Docker = &api.DockerConfig{}
}
// TODO: make less hard-coded
if channelClusterSpec.Docker.Storage != nil {
dockerStorage := fi.StringValue(cluster.Spec.Docker.Storage)
if dockerStorage != fi.StringValue(channelClusterSpec.Docker.Storage) {
actions = append(actions, &upgradeAction{
Item: "Cluster",
Property: "Docker.Storage",
Old: dockerStorage,
New: fi.StringValue(channelClusterSpec.Docker.Storage),
apply: func() {
cluster.Spec.Docker.Storage = channelClusterSpec.Docker.Storage
},
})
}
}
}
if len(actions) == 0 {
// TODO: Allow --force option to force even if not needed?
// Note stderr - we try not to print to stdout if no update is needed
fmt.Fprintf(os.Stderr, "\nNo upgrade required\n")
return nil
}
{
t := &tables.Table{}
t.AddColumn("ITEM", func(a *upgradeAction) string {
return a.Item
})
t.AddColumn("PROPERTY", func(a *upgradeAction) string {
return a.Property
})
t.AddColumn("OLD", func(a *upgradeAction) string {
return a.Old
})
t.AddColumn("NEW", func(a *upgradeAction) string {
return a.New
})
err := t.Render(actions, os.Stdout, "ITEM", "PROPERTY", "OLD", "NEW")
if err != nil {
return err
}
}
if !c.Yes {
fmt.Printf("\nMust specify --yes to perform upgrade\n")
return nil
} else {
for _, action := range actions {
action.apply()
}
// TODO: DRY this chunk
err = cluster.PerformAssignments()
if err != nil {
return fmt.Errorf("error populating configuration: %v", err)
}
fullCluster, err := cloudup.PopulateClusterSpec(cluster, clusterRegistry)
if err != nil {
return err
}
err = api.DeepValidate(fullCluster, instanceGroups, true)
if err != nil {
return err
}
// Note we perform as much validation as we can, before writing a bad config
err = clusterRegistry.Update(cluster)
if err != nil {
return err
}
for _, g := range instanceGroups {
err := instanceGroupRegistry.Update(g)
if err != nil {
return fmt.Errorf("error writing InstanceGroup %q to registry: %v", g.Name, err)
}
}
err = clusterRegistry.WriteCompletedConfig(fullCluster)
if err != nil {
return fmt.Errorf("error writing completed cluster spec: %v", err)
}
fmt.Printf("\nUpdates applied to configuration.\n")
// TODO: automate this step
fmt.Printf("You can now apply these changes, using `kops update cluster %s`\n", cluster.Name)
}
return nil
}