38 lines
1.0 KiB
Go
38 lines
1.0 KiB
Go
package node
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import (
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"context"
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"fmt"
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"github.com/docker/cli/cli"
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"github.com/docker/cli/cli/command"
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"github.com/moby/moby/api/types/swarm"
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"github.com/spf13/cobra"
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)
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func newDemoteCommand(dockerCli command.Cli) *cobra.Command {
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return &cobra.Command{
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Use: "demote NODE [NODE...]",
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Short: "Demote one or more nodes from manager in the swarm",
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Args: cli.RequiresMinArgs(1),
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RunE: func(cmd *cobra.Command, args []string) error {
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return runDemote(cmd.Context(), dockerCli, args)
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},
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ValidArgsFunction: completeNodeNames(dockerCli),
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}
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}
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func runDemote(ctx context.Context, dockerCLI command.Cli, nodes []string) error {
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demote := func(node *swarm.Node) error {
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if node.Spec.Role == swarm.NodeRoleWorker {
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_, _ = fmt.Fprintf(dockerCLI.Out(), "Node %s is already a worker.\n", node.ID)
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return errNoRoleChange
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}
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node.Spec.Role = swarm.NodeRoleWorker
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return nil
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}
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return updateNodes(ctx, dockerCLI.Client(), nodes, demote, func(nodeID string) {
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_, _ = fmt.Fprintf(dockerCLI.Out(), "Manager %s demoted in the swarm.\n", nodeID)
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})
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}
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