## storhaug HA for Ganesha and Samba

### Summary :
Switch to storhaug for HA for NFS-Ganesha, Samba, and more

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### Owners :
Kaleb S. KEITHLEY

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### Current status :
Under development.

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### Design discussions :


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### Related Feature Requests and Bugs :

TBD

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### Detailed Description :

The current state of HA for handles only NFS-Ganesha and is tightly
coupled to the gluster CLI (gluster, glusterd). Storhaug aims to
decouple from Gluster and provide a common HA solution for both
NFS-Ganesha and Samba. (Ceph's NFS-Ganesha using RGW, and later 
perhaps CephFS, would also like to leverage a common solution.)

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### Benefit to GlusterFS :

Storhaug is a generic Storage HA implementation for NFS-Ganesha
and Samba deployments using GlusterFS (and Ceph) backed storage.
Maintenance of a common implemenation can be shared by multiple
developers. Domain knowledge is shared by multiple developers.
Setup and management of Ganesha and Samba works the same for both.

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### Scope :

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#### Nature of proposed change :

Steps:
* The current HA implementation (.../extras/ganesha/*) is to be
removed from the source tree.
* The nfs-ganesha parts of the Gluster CLI will be removed or disabled.
Exact details are TBD.
* The storhaug bits will be refreshed to pick up bug fixes made
to the current implementation.
* Tests in Glusto and or CentOS CI.

Parallel task:
* Storhaug will be packaged for all the Linux distributions, i.e.
Fedora, CentOS Storage SIG, Ubuntu Launchpad PPA, Debian, SuSE
Build System. (independent, parallel task)

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#### Implications on manageability :

One common interface to manage Samba and/or NFS should result in an
easier management experience for admins.

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#### Implications on presentation layer :

NONE

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#### Implications on persistence layer :

NONE

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#### Implications on 'GlusterFS' backend :

NONE

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#### Modification to GlusterFS metadata :

NONE

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#### Implications on glusterd :

Changes related to disabling gluster NFS and related changes
to enabling NFS-Ganesha.

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#### Dependencies :

NONE

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#### Documentation :

TBD.

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### Status :

In development.

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### Comments and Discussion :

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