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12a00e6017
As described in our ROADMAP.md, introduce new Swarm management commands to call to the corresponding API endpoints. This PR is fully backward compatible (joining a Swarm is an optional feature of the Engine, and existing commands are not impacted). Signed-off-by: Daniel Nephin <dnephin@docker.com> Signed-off-by: Victor Vieux <vieux@docker.com> Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
100 lines
2.6 KiB
Go
100 lines
2.6 KiB
Go
package node
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import (
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"fmt"
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"github.com/docker/docker/api/client"
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"github.com/docker/docker/cli"
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runconfigopts "github.com/docker/docker/runconfig/opts"
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"github.com/docker/engine-api/types/swarm"
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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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func newUpdateCommand(dockerCli *client.DockerCli) *cobra.Command {
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var opts nodeOptions
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var flags *pflag.FlagSet
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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, args[0], mergeNodeUpdate(flags))
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},
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}
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flags = cmd.Flags()
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flags.StringVar(&opts.role, "role", "", "Role of the node (worker/manager)")
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flags.StringVar(&opts.membership, "membership", "", "Membership of the node (accepted/rejected)")
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flags.StringVar(&opts.availability, "availability", "", "Availability of the node (active/pause/drain)")
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return cmd
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}
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func runUpdate(dockerCli *client.DockerCli, nodeID string, mergeNode func(node *swarm.Node)) error {
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client := dockerCli.Client()
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ctx := context.Background()
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node, err := client.NodeInspect(ctx, nodeID)
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if err != nil {
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return err
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}
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mergeNode(&node)
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err = client.NodeUpdate(ctx, nodeID, 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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fmt.Fprintf(dockerCli.Out(), "%s\n", nodeID)
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return nil
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}
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func mergeNodeUpdate(flags *pflag.FlagSet) func(*swarm.Node) {
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return func(node *swarm.Node) {
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mergeString := func(flag string, field *string) {
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if flags.Changed(flag) {
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*field, _ = flags.GetString(flag)
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}
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}
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mergeRole := func(flag string, field *swarm.NodeRole) {
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if flags.Changed(flag) {
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str, _ := flags.GetString(flag)
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*field = swarm.NodeRole(str)
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}
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}
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mergeMembership := func(flag string, field *swarm.NodeMembership) {
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if flags.Changed(flag) {
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str, _ := flags.GetString(flag)
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*field = swarm.NodeMembership(str)
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}
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}
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mergeAvailability := func(flag string, field *swarm.NodeAvailability) {
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if flags.Changed(flag) {
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str, _ := flags.GetString(flag)
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*field = swarm.NodeAvailability(str)
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}
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}
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mergeLabels := func(flag string, field *map[string]string) {
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if flags.Changed(flag) {
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values, _ := flags.GetStringSlice(flag)
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for key, value := range runconfigopts.ConvertKVStringsToMap(values) {
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(*field)[key] = value
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}
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}
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}
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spec := &node.Spec
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mergeString("name", &spec.Name)
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// TODO: setting labels is not working
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mergeLabels("label", &spec.Labels)
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mergeRole("role", &spec.Role)
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mergeMembership("membership", &spec.Membership)
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mergeAvailability("availability", &spec.Availability)
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}
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}
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