How to provide passwords to startjobmanager if started from a script?

Dear community,

I intend to install mathworks via ansible on a Debian machine and get an error concerning the password entry. The method I applied for R2022b does not work for R2023b.

The behavior can be reproduced, as illustrated:

huth@delphi:~$ /usr/local/mathworks/v2023b/toolbox/parallel/bin/startjobmanager

*** Set Parallel Computing Password ***

You have set user 'admin' to be the administrator for jobmanager

default_jobmanager on host delphi.energietechnik.tu-berlin.de. To enable this

account, create a password for user 'admin'.

Password:

Confirm the password:

huth@delphi:~$ /usr/local/mathworks/v2023b/toolbox/parallel/bin/stopjobmanager -clean

huth@delphi:~$ echo -e 's3cr3t\ns3cr3t' | /usr/local/mathworks/v2023b/toolbox/parallel/bin/startjobmanager

*** Set Parallel Computing Password ***

You have set user 'admin' to be the administrator for jobmanager

default_jobmanager on host delphi.energietechnik.tu-berlin.de. To enable this

account, create a password for user 'admin'.

Registering the admin user for job manager on host delphi.energietechnik.tu-berlin.de:27352 failed.

The admin user will not be available in this job manager.

Restart the job manager to register the admin user.

The cause of the problem is:

============================================================================

Operation aborted because no credentials were entered for user admin.

============================================================================

huth@delphi:~$

Best regards,

Frank Huth

Answer 1

[Kyle Allison]

You can use a tool like expect to automate the entry of credentials. For example, create a file named startjobmanager.exp with the following contents

#!/usr/bin/expect

spawn /usr/local/mathworks/v2023b/toolbox/parallel/bin/startjobmanager
expect "Password: \r"
send -- "s3cr3t\r"
expect "Confirm the password: \r"
send -- "s3cr3t\r"
expect eof

and make it executable

$ chmod +x startjobmanager.exp

You can then run

$ ./startjobmanager.exp

and the job manager should start (non-interactively) with the admin password set to s3cr3t.