DockerCLI/cli/command/node/promote.go

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package node
import (
"context"
"fmt"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/docker/api/types/swarm"
"github.com/spf13/cobra"
)
func newPromoteCommand(dockerCli command.Cli) *cobra.Command {
return &cobra.Command{
Use: "promote NODE [NODE...]",
Short: "Promote one or more nodes to manager in the swarm",
Args: cli.RequiresMinArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
return runPromote(cmd.Context(), dockerCli, args)
},
}
}
func runPromote(ctx context.Context, dockerCli command.Cli, nodes []string) error {
promote := func(node *swarm.Node) error {
if node.Spec.Role == swarm.NodeRoleManager {
fmt.Fprintf(dockerCli.Out(), "Node %s is already a manager.\n", node.ID)
return errNoRoleChange
}
node.Spec.Role = swarm.NodeRoleManager
return nil
}
success := func(nodeID string) {
fmt.Fprintf(dockerCli.Out(), "Node %s promoted to a manager in the swarm.\n", nodeID)
}
return updateNodes(ctx, dockerCli, nodes, promote, success)
}