[Samba] Active/Passive Samba Cluster for Shared NFS Backend

[John Yocum]

On 09/17/2014 11:57 AM, Andrew Martin wrote:
> Hello,
> 
> I am working on setting up an Active/Passive Samba cluster on Ubuntu 14.04
> using Samba 4.1.6. Samba will be sharing an NFS mount so that it can be
> accessible to CIFS clients. Thus, the server setup is as follows:
> 
>              -- cifs0 --
>             /           \
>            /             \
> NFS_Server                VIP --- CIFS clients
>            \             /
>             \           /
>              -- cifs1 --
> 
> The NFS export is mounted at the same place on both cifs0 and cifs1, /mnt/nfs.
> I have configured "lock directory" to point at a directory inside of the NFS
> share: 
> lock directory = /mnt/nfs/locks
> 
> I then configured a share: 
> test]
>  path = /mnt/nfs/test
>  browseable = yes
>  public = yes
>  guest ok = yes
>  writable = yes
>  create mode = 0644
>  directory mode = 0775
> 
> Both cifs0 and cifs1 are running keepalived to export a VIP and move it between
> the two of them. All CIFS clients use this VIP for accessing the share. I have
> some questions about this setup:
>  * does "private dir" also need to be on the shared NFS directory? I am syncing
>    the smb.conf to be identical on both servers (except for "netbios name"), so
>    I don't think it's necessary to have it on shared storage 
>  * can I have smbd and nmbd running on both cifs0 and cifs1 simultaneously, 
>    since traffic should only come through one server at any given time?  
>  * are there any other problems with this configuration?
> 
> Thanks,
> 
> Andrew Martin
> 

You may want to look into Samba CTDB, which is Samba's clustering
solution. https://ctdb.samba.org/

-- 
John Yocum, Systems Administrator, DEOHS