mirror of
https://github.com/moby/moby.git
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121 lines
3.2 KiB
Go
121 lines
3.2 KiB
Go
package node
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import (
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"fmt"
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"github.com/docker/docker/api/types/swarm"
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"github.com/docker/docker/cli"
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"github.com/docker/docker/cli/command"
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"github.com/docker/docker/opts"
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runconfigopts "github.com/docker/docker/runconfig/opts"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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"golang.org/x/net/context"
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)
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var (
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errNoRoleChange = errors.New("role was already set to the requested value")
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)
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func newUpdateCommand(dockerCli command.Cli) *cobra.Command {
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nodeOpts := newNodeOptions()
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cmd := &cobra.Command{
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Use: "update [OPTIONS] NODE",
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Short: "Update a node",
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Args: cli.ExactArgs(1),
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RunE: func(cmd *cobra.Command, args []string) error {
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return runUpdate(dockerCli, cmd.Flags(), args[0])
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},
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}
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flags := cmd.Flags()
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flags.StringVar(&nodeOpts.role, flagRole, "", `Role of the node ("worker"|"manager")`)
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flags.StringVar(&nodeOpts.availability, flagAvailability, "", `Availability of the node ("active"|"pause"|"drain")`)
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flags.Var(&nodeOpts.annotations.labels, flagLabelAdd, "Add or update a node label (key=value)")
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labelKeys := opts.NewListOpts(nil)
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flags.Var(&labelKeys, flagLabelRemove, "Remove a node label if exists")
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return cmd
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}
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func runUpdate(dockerCli command.Cli, flags *pflag.FlagSet, nodeID string) error {
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success := func(_ string) {
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fmt.Fprintln(dockerCli.Out(), nodeID)
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}
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return updateNodes(dockerCli, []string{nodeID}, mergeNodeUpdate(flags), success)
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}
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func updateNodes(dockerCli command.Cli, nodes []string, mergeNode func(node *swarm.Node) error, success func(nodeID string)) error {
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client := dockerCli.Client()
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ctx := context.Background()
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for _, nodeID := range nodes {
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node, _, err := client.NodeInspectWithRaw(ctx, nodeID)
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if err != nil {
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return err
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}
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err = mergeNode(&node)
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if err != nil {
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if err == errNoRoleChange {
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continue
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}
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return err
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}
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err = client.NodeUpdate(ctx, node.ID, node.Version, node.Spec)
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if err != nil {
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return err
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}
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success(nodeID)
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}
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return nil
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}
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func mergeNodeUpdate(flags *pflag.FlagSet) func(*swarm.Node) error {
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return func(node *swarm.Node) error {
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spec := &node.Spec
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if flags.Changed(flagRole) {
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str, err := flags.GetString(flagRole)
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if err != nil {
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return err
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}
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spec.Role = swarm.NodeRole(str)
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}
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if flags.Changed(flagAvailability) {
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str, err := flags.GetString(flagAvailability)
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if err != nil {
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return err
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}
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spec.Availability = swarm.NodeAvailability(str)
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}
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if spec.Annotations.Labels == nil {
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spec.Annotations.Labels = make(map[string]string)
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}
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if flags.Changed(flagLabelAdd) {
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labels := flags.Lookup(flagLabelAdd).Value.(*opts.ListOpts).GetAll()
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for k, v := range runconfigopts.ConvertKVStringsToMap(labels) {
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spec.Annotations.Labels[k] = v
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}
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}
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if flags.Changed(flagLabelRemove) {
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keys := flags.Lookup(flagLabelRemove).Value.(*opts.ListOpts).GetAll()
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for _, k := range keys {
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// if a key doesn't exist, fail the command explicitly
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if _, exists := spec.Annotations.Labels[k]; !exists {
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return errors.Errorf("key %s doesn't exist in node's labels", k)
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}
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delete(spec.Annotations.Labels, k)
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}
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}
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return nil
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}
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}
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const (
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flagRole = "role"
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flagAvailability = "availability"
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flagLabelAdd = "label-add"
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flagLabelRemove = "label-rm"
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)
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