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reboot_queue_add.go
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reboot_queue_add.go
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package cmd
import (
"context"
"errors"
"fmt"
"io"
"os"
"strings"
"github.com/cybozu-go/cke"
"github.com/cybozu-go/well"
"github.com/spf13/cobra"
)
var rebootQueueAddCmd = &cobra.Command{
Use: "add FILE",
Short: "append the nodes written in FILE to the reboot queue",
Long: `Append the nodes written in FILE to the reboot queue.
The nodes should be specified with their IP addresses.
If FILE is -, the contents are read from stdin.`,
Args: cobra.ExactArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
f := os.Stdin
if args[0] != "-" {
var err error
f, err = os.Open(args[0])
if err != nil {
return err
}
defer f.Close()
}
data, err := io.ReadAll(f)
if err != nil {
return err
}
nodes := strings.Fields(string(data))
entry := cke.NewRebootQueueEntry(nodes)
well.Go(func(ctx context.Context) error {
cluster, err := storage.GetCluster(ctx)
if err != nil {
return err
}
err = validateNodes(nodes, cluster)
if err != nil {
return err
}
return storage.RegisterRebootsEntry(ctx, entry)
})
well.Stop()
return well.Wait()
},
}
func validateNodes(nodes []string, cluster *cke.Cluster) error {
numCPs := 0
OUTER:
for _, rebootNode := range nodes {
for _, clusterNode := range cluster.Nodes {
if rebootNode == clusterNode.Address {
if clusterNode.ControlPlane {
numCPs++
}
continue OUTER
}
}
return fmt.Errorf("%s is not a valid node IP address", rebootNode)
}
if numCPs > 1 {
return errors.New("multiple control planes cannot be enqueued in one entry")
}
return nil
}
func init() {
rebootQueueCmd.AddCommand(rebootQueueAddCmd)
}