(In reply to Prashant Dhange from comment #0)
> Description of problem:
> The ceph mgr modules like balancer or devicehealth should be allowed to
> disable. 
> 
> For example, the balancer module cannot be disabled :
> 
> The balancer is in *always_on_modules* and cannot be disabled(?). 
> 
> # ceph versions
> {
>     "mon": {
>         "ceph version 14.2.8-91.el8cp
> (75b4845da7d469665bd48d1a49badcc3677bf5cd) nautilus (stable)": 3
>     },
>     "mgr": {
>         "ceph version 14.2.8-91.el8cp
> (75b4845da7d469665bd48d1a49badcc3677bf5cd) nautilus (stable)": 3
>     },
>     "osd": {
>         "ceph version 14.2.8-91.el8cp
> (75b4845da7d469665bd48d1a49badcc3677bf5cd) nautilus (stable)": 6
>     },
>     "mds": {
>         "ceph version 14.2.8-91.el8cp
> (75b4845da7d469665bd48d1a49badcc3677bf5cd) nautilus (stable)": 1
>     },
>     "rgw": {
>         "ceph version 14.2.8-91.el8cp
> (75b4845da7d469665bd48d1a49badcc3677bf5cd) nautilus (stable)": 1
>     },
>     "overall": {
>         "ceph version 14.2.8-91.el8cp
> (75b4845da7d469665bd48d1a49badcc3677bf5cd) nautilus (stable)": 14
>     }
> }
> 
> # ceph mgr module ls|jq '.always_on_modules,.enabled_modules'
> [
>   "balancer",
>   "crash",
>   "devicehealth",
>   "orchestrator_cli",
>   "progress",
>   "rbd_support",
>   "status",
>   "volumes"
> ]
> [
>   "dashboard"
> ]
> 
> # ceph mgr module disable balancer
> Error EINVAL: module 'balancer' cannot be disabled (always-on)

Have you tried to use "ceph balancer off"? That should do it.

> 
> # ceph mgr module disable balancer --force
> Invalid command: unused arguments: ['--force']
> mgr module disable <module> :  disable mgr module
> Error EINVAL: invalid command
> 
> # ceph mgr module ls|jq '.always_on_modules,.enabled_modules'
> [
>   "balancer",
>   "crash",
>   "devicehealth",
>   "orchestrator_cli",
>   "progress",
>   "rbd_support",
>   "status",
>   "volumes"
> ]
> [
>   "dashboard"
> ]
> 
> 
> Version-Release number of selected component (if applicable):
> 14.2.8-91.el8cp
> 
> How reproducible:
> Frequently
> 
> Steps to Reproduce:
> 1. Deploy ceph cluster
> 2. Try disabling balacer or devicehealth modules
> 
> Actual results:
> Unable to disable modules from always_on_modules
> 
> Expected results:
> Disabling modules from always_on_modules should be allowed
> 
> Additional info: