As of June 2020, SDM SOAP Web Services are exposed as a service only on sdmapp-0 pod.

kubectl -n casm-docker describe service sdmapp-ws  gives something like:

Name:              sdmapp-ws
Namespace:         casm-docker
Labels:            app=sdmapp-ws
Annotations:       kubectl.kubernetes.io/last-applied-configuration:
                     {"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"app":"sdmapp-ws"},"name":"sdmapp-ws","namespace":"casm-docker"...
Selector:          app=casm,component=sdmapp,product=SDM
Type:              ClusterIP
IP:                X.X.X.X
Port:              web-services  8080/TCP
TargetPort:        8080/TCP
Endpoints:         Y.Y.Y.Y:8080
Session Affinity:  None
Events:            <none>

Note: Y.Y.Y.Y above would show sdmapp-0's IP address.

This might have been an oversight, steps below helps you remove the restriction 

Release : 17.3

Component : SERVICE DESK MANAGER

Modify service-core.yaml for SDM container in "50 - sdm" folder to look like below.

50 - sdm\service-core.yaml

apiVersion: v1
kind: Service
metadata:
  labels:
    app: sdmapp-ws
  name: sdmapp-ws
spec:
  ports:
  - name: web-services
    port: 8080
    protocol: TCP
    targetPort: 8080
  selector:
    app: casm
    component: sdmapp
    product: SDM
    options.deploy_web_services: "1"
  sessionAffinity: None
  type: ClusterIP

note: we removed the line        statefulset.kubernetes.io/pod-name: sdmapp-0      and removed the comment in front of           # options.deploy_web_services: "1"

Re-run apply.sh

Delete the pods to regenerate them again