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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>
93 lines
2.4 KiB
Go
93 lines
2.4 KiB
Go
package swarm
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import (
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"fmt"
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"golang.org/x/net/context"
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"github.com/docker/docker/api/client"
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"github.com/docker/docker/cli"
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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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)
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type updateOptions struct {
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autoAccept AutoAcceptOption
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secret string
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taskHistoryLimit int64
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heartbeatPeriod uint64
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}
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func newUpdateCommand(dockerCli *client.DockerCli) *cobra.Command {
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opts := updateOptions{autoAccept: NewAutoAcceptOption()}
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var flags *pflag.FlagSet
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cmd := &cobra.Command{
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Use: "update",
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Short: "update the Swarm.",
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Args: cli.NoArgs,
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RunE: func(cmd *cobra.Command, args []string) error {
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return runUpdate(dockerCli, flags, opts)
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},
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}
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flags = cmd.Flags()
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flags.Var(&opts.autoAccept, "auto-accept", "Auto acceptance policy (worker, manager or none)")
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flags.StringVar(&opts.secret, "secret", "", "Set secret value needed to accept nodes into cluster")
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flags.Int64Var(&opts.taskHistoryLimit, "task-history-limit", 10, "Task history retention limit")
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flags.Uint64Var(&opts.heartbeatPeriod, "dispatcher-heartbeat-period", 5000000000, "Dispatcher heartbeat period")
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return cmd
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}
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func runUpdate(dockerCli *client.DockerCli, flags *pflag.FlagSet, opts updateOptions) error {
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client := dockerCli.Client()
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ctx := context.Background()
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swarm, err := client.SwarmInspect(ctx)
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if err != nil {
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return err
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}
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err = mergeSwarm(&swarm, flags)
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if err != nil {
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return err
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}
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err = client.SwarmUpdate(ctx, swarm.Version, swarm.Spec)
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if err != nil {
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return err
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}
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fmt.Println("Swarm updated.")
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return nil
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}
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func mergeSwarm(swarm *swarm.Swarm, flags *pflag.FlagSet) error {
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spec := &swarm.Spec
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if flags.Changed("auto-accept") {
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value := flags.Lookup("auto-accept").Value.(*AutoAcceptOption)
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if len(spec.AcceptancePolicy.Policies) > 0 {
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spec.AcceptancePolicy.Policies = value.Policies(spec.AcceptancePolicy.Policies[0].Secret)
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} else {
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spec.AcceptancePolicy.Policies = value.Policies("")
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}
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}
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if flags.Changed("secret") {
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secret, _ := flags.GetString("secret")
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for _, policy := range spec.AcceptancePolicy.Policies {
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policy.Secret = secret
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}
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}
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if flags.Changed("task-history-limit") {
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spec.Orchestration.TaskHistoryRetentionLimit, _ = flags.GetInt64("task-history-limit")
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}
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if flags.Changed("dispatcher-heartbeat-period") {
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spec.Dispatcher.HeartbeatPeriod, _ = flags.GetUint64("dispatcher-heartbeat-period")
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}
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return nil
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}
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