Node-red and Check_mk

[Arun Dev]

Hi,

i'm struggling with the communication between node-red and check_mk. The idea was to trigger an event (in check_mk) through a namped_pipe provided by checkmk. Therefore you can write a text message (e.g. '<78>Dec 18 10:40:00 myserver123 MyApplication: It happened again.') locally to the named pipe to trigger an event.

Now everything should work in a node. The node should check the string for various test criteria and then write the string on the named pipe.

To transfer the string to the named pipe i used these code-lines:

var fs = require('fs');
var writableStream = fs.createWriteStream('/opt/omd/sites/monitoring/tmp/run/mkeventd/events');
writableStream.write(Msg);

Now the Problem:

If i declare the string within the js-file (which i need to create a node) and then transfer it to writableStream.write(); everything works fine and an event in checkmk gets triggered.

But if im defining a string outside the node (like in an inject-node; msg.payload) and then using it in my node... the triggering fails.

Here are some Variantes i tried without any success.

//Var1
var Msg2 = msg.payload;
.
.
writableStream.write(Msg2);

//Var2

writableStream.write(msg.payload);

//Var3

var Msg2 = msg.payload;
Msg2 = Msg2.toString();
writableStream.write(Msg2);

Any advices will be taken with much gratitude :)

regards

Arun