gRPC IP Setting

[ufsaa2022]

I'm trying gRPC by looking at the page below.

• https://mapdl.docs.pyansys.com/getting_started/running_mapdl.html?highlight=grpc

I created an .ip file with this: echo '<server ip>' > mylocal.ip

And I ran mapdl: mapdl = Mapdl('<server ip>', port=50052)

But I am getting these errors.

>  RUN SETUP PROCEDURE FROM FILE= C:\Program Files\ANSYS Inc\v222\ANSYS\apdl\start.ans
>  Start GRPC Server
>  > Get the IP Adress from the mylocal.ip file
> E0907 14:41:49.514000000  3996 server_chttp2.cc:40] {"created":"@1662529309.514000000","description":"OS Error","file":"C:\.conan\ed75c1\1\grpc\src\core\lib\iomgr\resolve_address_windows.cc","file_line":96,"os_error":"No such host is known.\r\n","syscall":"getaddrinfo","wsa_error":11001}
> ##############################
> ### SOMETHING IS WRONG     ###
> ###                        ###
> ### -> Command is aborted  ###
> ##############################
> 
>  /INPUT FILE= C:\Program Files\ANSYS Inc\v222\ANSYS\apdl\start.ans  LINE=       0

If I run it without generating the .ip file, it works fine.

> Start GRPC Server
> 
> ##############################
> ### START GRPC SERVER      ###
> ##############################
> 
> Server Executable   : MapdlGrpc Server
> Server listening on : 0.0.0.0:50052

What's the problem?
Thanks,

[akaszynski]

Hello,

Does the mylocal.ip file contain an IP address like 127.0.0.1? Try creating the following:

mylocal.ip

127.0.0.1

mapdl = Mapdl(ip='127.0.0.1', port=50052)

[germa89]

I really think this file is to start a server in another machine, but we normally don't want to do that.....

[FredAns]

The default behavior of MAPDL ( as seen in screenshots when it works fine) is to start the MAPDL gRPC server using the IP address 0.0.0.0, and not the specific IP address of the machine, to ensure connections are accepted ( @akaszynski correct me if I'm wrong).
In a first release we were using the unique IP address of the machine ( the one we get from an ifconfig call on linux for instance) , and to keep the ability to test this, this file allows to force the IP address value we want to use.

[germa89]

If it is for testing then, I think then this "feature" should not be available to public users. Am I right?

[FredAns]

I tend to agree with you @germa89 .. That's a kind of open door for experimental, in case we want to check something.

[germa89]

I will remove it in the following minor.

[mikerife]

Hi @dhkimmm @germa89
It seems like the server and client computers are different computers. If so using the local host IP address (127.0.0.1) from the client computer will not work. You need to use the IP address of the server that the client sees. I will assume the server hostname is "server"; please replace that with the actual host name. In step 2 issue the DOS command:

ping -4 server

That should return a IPv4 style IP address for the server (it will show a "Reply from" and then the IP address). Let's call that "1.2.3.4". Then finish steps 2-4 with the server IP address (1.2.3.4) substituting the real server IP address!

Mike