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rollingupdate_cluster.go
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rollingupdate_cluster.go
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package main
import (
"fmt"
"github.com/spf13/cobra"
"k8s.io/kops/upup/pkg/api"
"k8s.io/kops/upup/pkg/fi/cloudup"
"k8s.io/kops/upup/pkg/kutil"
"k8s.io/kops/util/pkg/tables"
k8sapi "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/v1"
"k8s.io/kubernetes/pkg/client/clientset_generated/release_1_3"
"k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
"os"
"strconv"
"time"
)
type RollingUpdateClusterCmd struct {
Yes bool
Force bool
CloudOnly bool
MasterInterval time.Duration
NodeInterval time.Duration
cobraCommand *cobra.Command
}
var rollingupdateCluster = RollingUpdateClusterCmd{
cobraCommand: &cobra.Command{
Use: "cluster",
Short: "rolling-update cluster",
Long: `rolling-updates a k8s cluster.`,
},
}
func init() {
cmd := rollingupdateCluster.cobraCommand
rollingUpdateCommand.cobraCommand.AddCommand(cmd)
cmd.Flags().BoolVar(&rollingupdateCluster.Yes, "yes", false, "perform rolling update without confirmation")
cmd.Flags().BoolVar(&rollingupdateCluster.Force, "force", false, "Force rolling update, even if no changes")
cmd.Flags().BoolVar(&rollingupdateCluster.CloudOnly, "cloudonly", false, "Perform rolling update without confirming progress with k8s")
cmd.Flags().DurationVar(&rollingupdateCluster.MasterInterval, "master-interval", 5*time.Minute, "Time to wait between restarting masters")
cmd.Flags().DurationVar(&rollingupdateCluster.NodeInterval, "node-interval", 2*time.Minute, "Time to wait between restarting nodes")
cmd.Run = func(cmd *cobra.Command, args []string) {
err := rollingupdateCluster.Run(args)
if err != nil {
exitWithError(err)
}
}
}
func (c *RollingUpdateClusterCmd) Run(args []string) error {
err := rootCommand.ProcessArgs(args)
if err != nil {
return err
}
cluster, err := rootCommand.Cluster()
if err != nil {
return err
}
clientset, err := rootCommand.Clientset()
if err != nil {
return err
}
contextName := cluster.Name
config, err := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
clientcmd.NewDefaultClientConfigLoadingRules(),
&clientcmd.ConfigOverrides{CurrentContext: contextName}).ClientConfig()
if err != nil {
return fmt.Errorf("cannot load kubecfg settings for %q: %v", contextName, err)
}
var nodes []v1.Node
var k8sClient *release_1_3.Clientset
if !c.CloudOnly {
k8sClient, err = release_1_3.NewForConfig(config)
if err != nil {
return fmt.Errorf("cannot build kube client for %q: %v", contextName, err)
}
nodeList, err := k8sClient.Core().Nodes().List(k8sapi.ListOptions{})
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to reach the kubernetes API.\n")
fmt.Fprintf(os.Stderr, "Use --cloudonly to do a rolling-update without confirming progress with the k8s API\n\n")
return fmt.Errorf("error listing nodes in cluster: %v", err)
}
if nodeList != nil {
nodes = nodeList.Items
}
}
list, err := clientset.InstanceGroups(cluster.Name).List(k8sapi.ListOptions{})
if err != nil {
return err
}
var instancegroups []*api.InstanceGroup
for i := range list.Items {
instancegroups = append(instancegroups, &list.Items[i])
}
cloud, err := cloudup.BuildCloud(cluster)
if err != nil {
return err
}
d := &kutil.RollingUpdateCluster{
MasterInterval: c.MasterInterval,
NodeInterval: c.NodeInterval,
Force: c.Force,
}
d.Cloud = cloud
warnUnmatched := true
groups, err := kutil.FindCloudInstanceGroups(cloud, cluster, instancegroups, warnUnmatched, nodes)
if err != nil {
return err
}
{
t := &tables.Table{}
t.AddColumn("NAME", func(r *kutil.CloudInstanceGroup) string {
return r.InstanceGroup.Name
})
t.AddColumn("STATUS", func(r *kutil.CloudInstanceGroup) string {
return r.Status
})
t.AddColumn("NEEDUPDATE", func(r *kutil.CloudInstanceGroup) string {
return strconv.Itoa(len(r.NeedUpdate))
})
t.AddColumn("READY", func(r *kutil.CloudInstanceGroup) string {
return strconv.Itoa(len(r.Ready))
})
t.AddColumn("MIN", func(r *kutil.CloudInstanceGroup) string {
return strconv.Itoa(r.MinSize())
})
t.AddColumn("MAX", func(r *kutil.CloudInstanceGroup) string {
return strconv.Itoa(r.MaxSize())
})
t.AddColumn("NODES", func(r *kutil.CloudInstanceGroup) string {
var nodes []*v1.Node
for _, i := range r.Ready {
if i.Node != nil {
nodes = append(nodes, i.Node)
}
}
for _, i := range r.NeedUpdate {
if i.Node != nil {
nodes = append(nodes, i.Node)
}
}
return strconv.Itoa(len(nodes))
})
var l []*kutil.CloudInstanceGroup
for _, v := range groups {
l = append(l, v)
}
columns := []string{"NAME", "STATUS", "NEEDUPDATE", "READY", "MIN", "MAX"}
if !c.CloudOnly {
columns = append(columns, "NODES")
}
err := t.Render(l, os.Stdout, columns...)
if err != nil {
return err
}
}
needUpdate := false
for _, group := range groups {
if len(group.NeedUpdate) != 0 {
needUpdate = true
}
}
if !needUpdate && !c.Force {
fmt.Printf("\nNo rolling-update required\n")
return nil
}
if !c.Yes {
fmt.Printf("\nMust specify --yes to rolling-update\n")
return nil
}
return d.RollingUpdate(groups, k8sClient)
}