missed some error checking, and added a workaround to weird docker event listening bug

Author: progrium

attacher.go

@@ -30,6 +30,9 @@ func NewAttachManager(client *docker.Client) *AttachManager {
 	}
 	go func() {
 		events := make(chan *docker.APIEvents)
+		// TODO: resolve this workaround. https://github.com/fsouza/go-dockerclient/issues/101
+		assert(client.AddEventListener(events), "attacher")
+		assert(client.RemoveEventListener(events), "attacher")
 		assert(client.AddEventListener(events), "attacher")
 		for msg := range events {
 			debug("event:", msg.ID[:12], msg.Status)

logspout.go

@@ -61,7 +61,8 @@ func syslogStreamer(target Target, types []string, logstream chan *Log) {
 			continue
 		}
 		tag := logline.Name + target.AppendTag
-		remote, _ := syslog.Dial("udp", target.Addr, syslog.LOG_USER|syslog.LOG_INFO, tag)
+		remote, err := syslog.Dial("udp", target.Addr, syslog.LOG_USER|syslog.LOG_INFO, tag)
+		assert(err, "syslog")
 		io.WriteString(remote, logline.Data)
 	}
 }