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get_instancegroups.go
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/
get_instancegroups.go
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package main
import (
"fmt"
"os"
"strconv"
"strings"
"github.com/spf13/cobra"
"k8s.io/kops/upup/pkg/api"
"k8s.io/kops/util/pkg/tables"
k8sapi "k8s.io/kubernetes/pkg/api"
)
type GetInstanceGroupsCmd struct {
}
var getInstanceGroupsCmd GetInstanceGroupsCmd
func init() {
cmd := &cobra.Command{
Use: "instancegroups",
Aliases: []string{"instancegroup", "ig"},
Short: "get instancegroups",
Long: `List or get InstanceGroups.`,
Run: func(cmd *cobra.Command, args []string) {
err := getInstanceGroupsCmd.Run(args)
if err != nil {
exitWithError(err)
}
},
}
getCmd.cobraCommand.AddCommand(cmd)
}
func (c *GetInstanceGroupsCmd) Run(args []string) error {
clusterName := rootCommand.ClusterName()
if clusterName == "" {
return fmt.Errorf("--name is required")
}
clientset, err := rootCommand.Clientset()
if err != nil {
return err
}
list, err := clientset.InstanceGroups(clusterName).List(k8sapi.ListOptions{})
if err != nil {
return err
}
var instancegroups []*api.InstanceGroup
if len(args) != 0 {
m := make(map[string]*api.InstanceGroup)
for i := range list.Items {
ig := &list.Items[i]
m[ig.Name] = ig
}
instancegroups = make([]*api.InstanceGroup, 0, len(args))
for _, arg := range args {
ig := m[arg]
if ig == nil {
return fmt.Errorf("instancegroup not found %q", arg)
}
instancegroups = append(instancegroups, ig)
}
} else {
for i := range list.Items {
ig := &list.Items[i]
instancegroups = append(instancegroups, ig)
}
}
if len(instancegroups) == 0 {
fmt.Fprintf(os.Stderr, "No InstanceGroup objects found\n")
return nil
}
output := getCmd.output
if output == OutputTable {
t := &tables.Table{}
t.AddColumn("NAME", func(c *api.InstanceGroup) string {
return c.Name
})
t.AddColumn("ROLE", func(c *api.InstanceGroup) string {
return string(c.Spec.Role)
})
t.AddColumn("MACHINETYPE", func(c *api.InstanceGroup) string {
return c.Spec.MachineType
})
t.AddColumn("ZONES", func(c *api.InstanceGroup) string {
return strings.Join(c.Spec.Zones, ",")
})
t.AddColumn("MIN", func(c *api.InstanceGroup) string {
return intPointerToString(c.Spec.MinSize)
})
t.AddColumn("MAX", func(c *api.InstanceGroup) string {
return intPointerToString(c.Spec.MinSize)
})
return t.Render(instancegroups, os.Stdout, "NAME", "ROLE", "MACHINETYPE", "MIN", "MAX", "ZONES")
} else if output == OutputYaml {
for _, ig := range instancegroups {
y, err := api.ToYaml(ig)
if err != nil {
return fmt.Errorf("error marshaling yaml for %q: %v", ig.Name, err)
}
_, err = os.Stdout.Write(y)
if err != nil {
return fmt.Errorf("error writing to stdout: %v", err)
}
}
return nil
} else {
return fmt.Errorf("Unknown output format: %q", output)
}
}
func intPointerToString(v *int) string {
if v == nil {
return "-"
}
return strconv.Itoa(*v)
}