allow mounting through unix socket via fstab

[maxadamo]

Description of problem:

I am reviving the ticket #331 which was raised on 2017.

Gluster is simple to install, and in a few cases I am installing Gluster storage dedicated to a single application.
I am using 127.0.0.1 in fstab to mount the filesystem, but I'd like to use /var/run/glusterd.socket

The exact command to reproduce the issue:

being able to use the following inside fstab:

/var/run/glusterd.socket:forgejo       /test        glusterfs       defaults,_netdev,negative-timeout=10,attribute-timeout=30,fopen-keep-cache,direct-io-mode=enable,transport=unix        0       0

And, as specified in the issue #331 it throws an error like this:

[2024-10-03 08:11:15.029036 +0000] E [glusterfsd-mgmt.c:2371:mgmt_getspec_cbk] 0-mgmt: failed to fetch volume file (key:forgejo.unix)

It seems that it's appending .unix, and if that's really the problem, it should be fairly easy to fix it and I see no reason the push it back.

The full output of the command that failed:

[2024-10-03 08:11:15.019238 +0000] I [MSGID: 100030] [glusterfsd.c:2767:main] 0-/usr/sbin/glusterfs: Started running version [{arg=/usr/sbin/glusterfs}, {version=10.1}, {cmdlinestr=/usr/sbin/glusterfs --fopen-keep-cache=true --direct-io-mode=enable --attribute-timeout=30 --negative-timeout=10 --process-name fuse --volfile-server=/var/run/glusterd.socket --volfile-server-transport=unix --volfile-id=/forgejo.unix /test}] 
[2024-10-03 08:11:15.023844 +0000] I [glusterfsd.c:2447:daemonize] 0-glusterfs: Pid of current running process is 1139457
[2024-10-03 08:11:15.028742 +0000] I [MSGID: 101190] [event-epoll.c:667:event_dispatch_epoll_worker] 0-epoll: Started thread with index [{index=0}] 
[2024-10-03 08:11:15.028864 +0000] I [MSGID: 101190] [event-epoll.c:667:event_dispatch_epoll_worker] 0-epoll: Started thread with index [{index=1}] 
[2024-10-03 08:11:15.029023 +0000] E [glusterfsd-mgmt.c:2170:mgmt_getspec_cbk] 0-glusterfs: failed to get the 'volume file' from server
[2024-10-03 08:11:15.029036 +0000] E [glusterfsd-mgmt.c:2371:mgmt_getspec_cbk] 0-mgmt: failed to fetch volume file (key:/forgejo.unix)
[2024-10-03 08:11:15.029297 +0000] W [glusterfsd.c:1458:cleanup_and_exit] (-->/lib/x86_64-linux-gnu/libgfrpc.so.0(+0x10510) [0x7f7c0c8d0510] -->/usr/sbin/glusterfs(mgmt_getspec_cbk+0x747) [0x563699070eb7] -->/usr/sbin/glusterfs(cleanup_and_exit+0x5b) [0x5636990680bb] ) 0-: received signum (0), shutting down 
[2024-10-03 08:11:15.029339 +0000] I [fuse-bridge.c:7057:fini] 0-fuse: Unmounting '/test'.
[2024-10-03 08:11:15.031877 +0000] I [fuse-bridge.c:7061:fini] 0-fuse: Closing fuse connection to '/test'.[2024-10-03 08:11:15.019238 +0000] I [MSGID: 100030] [glusterfsd.c:2767:main] 0-/usr/sbin/glusterfs: Started running version [{arg=/usr/sbin/glusterfs}, {version=10.1}, {cmdlinestr=/usr/sbin/glusterfs --fopen-keep-cache=true --direct-io-mode=enable --attribute-timeout=30 --negative-timeout=10 --process-name fuse --volfile-server=/var/run/glusterd.socket --volfile-server-transport=unix --volfile-id=/forgejo.unix /test}] 
[2024-10-03 08:11:15.023844 +0000] I [glusterfsd.c:2447:daemonize] 0-glusterfs: Pid of current running process is 1139457
[2024-10-03 08:11:15.028742 +0000] I [MSGID: 101190] [event-epoll.c:667:event_dispatch_epoll_worker] 0-epoll: Started thread with index [{index=0}] 
[2024-10-03 08:11:15.028864 +0000] I [MSGID: 101190] [event-epoll.c:667:event_dispatch_epoll_worker] 0-epoll: Started thread with index [{index=1}] 
[2024-10-03 08:11:15.029023 +0000] E [glusterfsd-mgmt.c:2170:mgmt_getspec_cbk] 0-glusterfs: failed to get the 'volume file' from server
[2024-10-03 08:11:15.029036 +0000] E [glusterfsd-mgmt.c:2371:mgmt_getspec_cbk] 0-mgmt: failed to fetch volume file (key:/forgejo.unix)
[2024-10-03 08:11:15.029297 +0000] W [glusterfsd.c:1458:cleanup_and_exit] (-->/lib/x86_64-linux-gnu/libgfrpc.so.0(+0x10510) [0x7f7c0c8d0510] -->/usr/sbin/glusterfs(mgmt_getspec_cbk+0x747) [0x563699070eb7] -->/usr/sbin/glusterfs(cleanup_and_exit+0x5b) [0x5636990680bb] ) 0-: received signum (0), shutting down 
[2024-10-03 08:11:15.029339 +0000] I [fuse-bridge.c:7057:fini] 0-fuse: Unmounting '/test'.
[2024-10-03 08:11:15.031877 +0000] I [fuse-bridge.c:7061:fini] 0-fuse: Closing fuse connection to '/test'.

Expected results:

Mandatory info:
- The output of the gluster volume info command:

# gluster volume info
 
Volume Name: forgejo
Type: Replicate
Volume ID: 140a360d-db59-4af0-9f91-b8d2285b238d
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x 3 = 3
Transport-type: tcp
Bricks:
Brick1: test-forgejo-witness.example.org:/data/glusterfs/forgejo/brick_forgejo/brick
Brick2: test-forgejo01.example.org:/data/glusterfs/forgejo/brick_forgejo/brick
Brick3: test-forgejo02.example.org:/data/glusterfs/forgejo/brick_forgejo/brick
Options Reconfigured:
performance.client-io-threads: true
nfs.disable: on
transport.address-family: inet
storage.fips-mode-rchecksum: on
cluster.granular-entry-heal: on
client.event-threads: 3
performance.cache-size: 256MB
performance.io-cache: true
performance.io-thread-count: 16
performance.readdir-ahead: true
storage.owner-gid: 130
storage.owner-uid: 130
features.barrier: disable

- The output of the gluster volume status command:

# gluster volume status
Status of volume: forgejo
Gluster process                             TCP Port  RDMA Port  Online  Pid
------------------------------------------------------------------------------
Brick test-forgejo-witness.example.org:/data/
glusterfs/forgejo/brick_forgejo/brick       53950     0          Y       1811 
Brick test-forgejo01.example.org:/data/gluste
rfs/forgejo/brick_forgejo/brick             57698     0          Y       1844 
Brick test-forgejo02.example.org:/data/gluste
rfs/forgejo/brick_forgejo/brick             58762     0          Y       1871 
Self-heal Daemon on localhost               N/A       N/A        Y       1836 
Self-heal Daemon on test-forgejo01.geant.or
g                                           N/A       N/A        Y       1921 
Self-heal Daemon on test-forgejo02.geant.or
g                                           N/A       N/A        Y       1947 
 
Task Status of Volume forgejo
------------------------------------------------------------------------------
There are no active volume tasks

- The output of the gluster volume heal command:

n/a

**- Provide logs present on following locations of client and server nodes -

/var/log/glusterfs/

**- Is there any crash ? Provide the backtrace and coredump

n/a

Additional info:

- The operating system / glusterfs version:

Ubuntu 22.04
glusterfs-server 10.1-1