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Full Discussion: NFS active/active cluster with gluster and NFS-ganesha, I can create dirs, but not files!
Top Forums UNIX for Advanced & Expert Users NFS active/active cluster with gluster and NFS-ganesha, I can create dirs, but not files! Post 303045800 by Linusolaradm1 on Monday 13th of April 2020 05:52:02 PM
Old 04-13-2020
NFS active/active cluster with gluster and NFS-ganesha, I can create dirs, but not files!
Following this fantastic guide I finally setup an active working active/active nfs4 cluster.
The setup is not too difficult: two servers with ganesha+glusterfs other two with haproxy and keepalived.
The cluster works fine, from one client I have mount the nfs share called "nfshare" without problem


Code:
mount -t nfs4

nfsserver:/nfsshare on /mnt type nfs4 (rw,relatime,vers=4.2,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,clientaddr=10.2.0.170,local_lock=none,addr=10.2.0.7)


I have created some dirs on mnt and works perfect(there are replicated on nfsgluster servers). I have also rebooted for testing the nfs server one or two, and after a very little downtime (2 seconds) the connection is up and working.
The problem is..mkdir works, but every file operation(dd,cp,touch) fails(stuck,freeze until ctrl+c is pressed).

On both the nfs servers and keepalived servers there is no problem with selinux


Code:
grep -i denied /var/log/audit/audit.log


What can be?Why mkdir works and file operation not?

--- Post updated at 05:52 PM ---

Solution found, ganesha was misconfigured, I have forgot to add the ports for services.
 

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LEARN ABOUT LINUX

mountd

mountd(1M)                                                                                                                              mountd(1M)

NAME

       mountd - server for NFS mount requests and NFS access checks

SYNOPSIS

       /usr/lib/nfs/mountd [-v] [-r]

       mountd  is  an  RPC  server  that  answers  requests  for  NFS  access  information  and  file  system  mount  requests.  It reads the file
       /etc/dfs/sharetab to determine which file systems are available for mounting by which remote machines. See sharetab(4). nfsd running on the
       local  server  will  contact mountd the first time an NFS client tries to access the file system to determine whether the client should get
       read-write, read-only, or no access. This access can be dependent on the security mode used in the remoted procedure call from the  client.
       See share_nfs(1M).

       The command also provides information as to what file systems are mounted by which clients. This information can be printed using the show-
       mount(1M) command.

       The mountd daemon is automatically invoked by share(1M).

       Only super user can run the mountd daemon.

       The options shown below are supported for NVSv2/v3 clients. They are not supported for Solaris NFSv4 clients.

       -r       Reject mount requests from clients. Clients that have file systems mounted will not be affected.

       -v       Run the command in verbose mode. Each time mountd determines what access a client should get, it will log the result to  the  con-
                sole, as well as how it got that result.

       /etc/dfs/sharetab       shared file system table

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWnfssu                    |
       +-----------------------------+-----------------------------+

       nfsd(1M), share(1M), share_nfs(1M), showmount(1M), nfs(4), sharetab(4), attributes(5)

       Since  mountd  must  be  running for nfsd to function properly, mountd is automatically started by the svc:/network/nfs/server service. See
       nfs(4).

       Some routines that compare hostnames use case-sensitive string comparisons; some do not. If an incoming request fails, verify that the case
       of the hostname in the file to be parsed matches the case of the hostname called for, and attempt the request again.

                                                                    27 Apr 2005                                                         mountd(1M)
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