Add a cli command to run builtin plugins

command/plugin-exec.go

@@ -0,0 +1,71 @@
+package command
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/hashicorp/vault/meta"
+)
+
+type PluginExec struct {
+	meta.Meta
+}
+
+var builtinFactories = map[string]func() error{
+//	"mysql-database-plugin":    mysql.Factory,
+//	"postgres-database-plugin": postgres.Factory,
+}
+
+func (c *PluginExec) Run(args []string) int {
+	flags := c.Meta.FlagSet("plugin-exec", meta.FlagSetDefault)
+	flags.Usage = func() { c.Ui.Error(c.Help()) }
+	if err := flags.Parse(args); err != nil {
+		return 1
+	}
+
+	args = flags.Args()
+	if len(args) != 1 {
+		flags.Usage()
+		c.Ui.Error(fmt.Sprintf(
+			"\nplugin-exec expects one argument: the plugin to execute."))
+		return 1
+	}
+
+	pluginName := args[0]
+
+	factory, ok := builtinFactories[pluginName]
+	if !ok {
+		c.Ui.Error(fmt.Sprintf(
+			"No plugin with the name %s found", pluginName))
+		return 1
+	}
+
+	err := factory()
+	if err != nil {
+		c.Ui.Error(fmt.Sprintf(
+			"Error running plugin: %s", err))
+		return 1
+	}
+
+	return 0
+}
+
+func (c *PluginExec) Synopsis() string {
+	return "Force the Vault node to give up active duty"
+}
+
+func (c *PluginExec) Help() string {
+	helpText := `
+Usage: vault step-down [options]
+
+  Force the Vault node to step down from active duty.
+
+  This causes the indicated node to give up active status. Note that while the
+  affected node will have a short delay before attempting to grab the lock
+  again, if no other node grabs the lock beforehand, it is possible for the
+  same node to re-grab the lock and become active again.
+
+General Options:
+` + meta.GeneralOptionsUsage()
+	return strings.TrimSpace(helpText)
+}