Merge pull request #599 from ehazlett/swarm-auto-labels

add swarm label of provider by default

host.go

@@ -323,16 +323,19 @@ func (h *Host) generateDockerConfig(dockerPort int, caCertPath string, serverKey
 		daemonOpts    string
 		daemonOptsCfg string
 		daemonCfg     string
+		swarmLabels   = []string{}
 	)
 
-	// TODO @ehazlett: template?
-	defaultDaemonOpts := fmt.Sprintf(`--tlsverify \
---tlscacert=%s \
---tlskey=%s \
---tlscert=%s`, caCertPath, serverKeyPath, serverCertPath)
+	swarmLabels = append(swarmLabels, fmt.Sprintf("--label=provider=%s", h.Driver.DriverName()))
+
+	defaultDaemonOpts := fmt.Sprintf(`--tlsverify --tlscacert=%s --tlskey=%s --tlscert=%s %s`,
+		caCertPath,
+		serverKeyPath,
+		serverCertPath,
+		strings.Join(swarmLabels, " "),
+	)
 
 	switch d.DriverName() {
-
 	case "virtualbox", "vmwarefusion", "vmwarevsphere", "hyper-v":
 		daemonOpts = fmt.Sprintf("-H tcp://0.0.0.0:%d", dockerPort)
 		daemonOptsCfg = path.Join(d.GetDockerConfigDir(), "profile")