I am experiencing the same issue with PCF Ops Manager v2.1.7 and PKS v1.1.0-build.311 on VMware vSphere 6.5 . It would be good If we have any workaround till PKS 1.1.1 is released?
λ ~/Downloads pks cluster pksk8scluster
Name: pksk8scluster
Plan Name: small
UUID: bc15efcc-67a2-4636-a377-1bee2e98c9b3
Last Action: CREATE
Last Action State: failed
Last Action Description: Instance provisioning failed: There was a problem completing your request. Please contact your operations team providing the following information: service: p.pks, service-instance-guid: bc15efcc-67a2-4636-a377-1bee2e98c9b3, broker-request-id: d081167e-6083-4a4e-8fda-566fa173005f, task-id: 225, operation: create
Kubernetes Master Host: pksk8scluster.itp-inc.com
Kubernetes Master Port: 8443
Worker Nodes: 1
Kubernetes Master IP(s): In Progress
ubuntu@bosh-stemcell:~$ bosh -e vmware task 225
Using environment '10.9.85.16' as user 'director' (bosh.*.read, openid, bosh.*.admin, bosh.read, bosh.admin)
Task 225
Task 225 | 07:47:30 | Preparing deployment: Preparing deployment (00:00:01)
L Error: Duplicate variable name '/dns_api_tls_ca'
Task 225 | 07:47:31 | Error: Duplicate variable name '/dns_api_tls_ca'
Task 225 Started Thu Jul 12 07:47:30 UTC 2018
Task 225 Finished Thu Jul 12 07:47:31 UTC 2018
Task 225 Duration 00:00:01
Task 225 error
Capturing task '225' output:
Expected task '225' to succeed but state is 'error'
Exit code 1
ubuntu@bosh-stemcell:~$