SWAT within containerised (Viya4) environments : Referring to the bin and http K8s services

[SundareshSankaran]

On a Viya 4 environment, I have published the sas-cas-server-default-bin and ..default-http services as NodePorts. A conscious decision has been taken to not deploy them as LoadBalancers in order to reduce entry points and administration overhead.

Accessing a Python editor from within SAS Studio (which is the customer's intended use), I am able to successfully connect to the binary service, through the controller's (internal) IP address - a sequence starting with 10.XX.XX.XX

Services in K8s are commonly accessed through the DNS name of <service_name>.<name_of_name_space>.svc.cluster.local. In this case, however, I am unable to connect through any of the following patterns (including port of 5570).

Within the connection string of

conn=swat.CAS(hostname=, port=, user=, password=)

hostname = any of the following :

sas-cas-server-default-bin.viya.svc.cluster.local
cas-shared-default-bin.viya.svc.cluster.local
sas-cas-server-default-controller.viya.svc.cluster.local

What might be the correct naming convention so that I do not have to have my users explicitly state the IP ?

[bkemper24]

For the namespace 'viya'

sas-cas-server-default-client.viya.svc.cluster.local

[SundareshSankaran]

Thanks, @bkemper24 . I get the following error, though. May I also mention I'm using a self-signed certificate? At the same time, I felt the K8s DNS should take care of the same since this is an internal IP.

>>>
ERROR: The TCP/IP negClientSSL support routine failed with status 807ff019, hostname 10.0.191.XXX port 5570
ERROR: SSL Error: Invalid subject name in partner's certificate. Subject name must match machine name.
ERROR: Failed to connect to host 'sas-cas-server-default-client.viya.svc.cluster.local', port 5570.
Traceback (most recent call last):
  File "/opt/sas/viya/home/sas-pyconfig/default_py/lib/python3.10/site-packages/swat/cas/connection.py", line 437, in __init__
    self._sw_connection = clib.SW_CASConnection(*params)
  File "/opt/sas/viya/home/sas-pyconfig/default_py/lib/python3.10/site-packages/swat/clib.py", line 133, in SW_CASConnection
    return _pyswat.SW_CASConnection(*args, **kwargs)
SystemError: <class 'py310swat.SW_CASConnection'> returned NULL without setting an exception
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 7, in <module>
  File "/opt/sas/viya/home/sas-pyconfig/default_py/lib/python3.10/site-packages/swat/cas/connection.py", line 444, in __init__
    raise SWATError(self._sw_error.getLastErrorMessage())
swat.exceptions.SWATError: Could not connect to 'sas-cas-server-default-client.viya.svc.cluster.local' on port 5570.
>>>
>>>