Splunk Upgrade Failing / Constant Container "Restarting"

I have an old Splunk image running 7.2.5 as a heavy forwarder I'm trying to upgrade to the latest image. The Docker is using swarm for the orchestrator. After starting the new image it never stays running but is constantly in a cycle of restarting. Looking at the tail of the logs I see

2021-07-07T16:55:00.359683553Z TASK [splunk_common : Check for existing splunk secret] ************************
2021-07-07T16:55:00.360186022Z fatal: [localhost]: FAILED! => {
2021-07-07T16:55:00.360196058Z     "changed": false
2021-07-07T16:55:00.360198998Z }
2021-07-07T16:55:00.360201373Z 
2021-07-07T16:55:00.360203750Z MSG:
2021-07-07T16:55:00.360206217Z 
2021-07-07T16:55:00.360208614Z Permission denied
2021-07-07T16:55:00.364253598Z 
2021-07-07T16:55:00.364270798Z PLAY RECAP *********************************************************************
2021-07-07T16:55:00.364497637Z localhost                  : ok=6    changed=0    unreachable=0    failed=1    skipped=3    rescued=0    ignored=0 

This looks similar to another issue I found here where the problem was with mounting the existing volumes, and the solution was to make some corrections in the kubernetes yaml. I'm not running kubernetes through and haven't found where to correct this issue yet.

Start with the reported container logs and the Docker Swarm service configuration, especially the existing volume mounts and permissions. Reproduce the upgrade from Splunk 7.2.5 and compare the mounts with the newer image; done means the container remains running without the permission-denied failure.