[Bugs] [Bug 1540249] Gluster is trying to use a port outside documentation and firewalld' s glusterfs.xml

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1540249



--- Comment #13 from Atin Mukherjee <amukherj at redhat.com> ---
(In reply to Kaleb KEITHLEY from comment #12)
> In my case it's that SELinux appears to be blocking the bind() on 49151. I
> can start the volume if I disable SELinux. (I only tested on a single brick
> volume on the localhost so I would not be affected by the firewalld.)

You mean 49151 was allocated to a brick port? That can never happen! As in
glusterd's pmap the base port is set to 49152 and that from where the brick
port allocation starts. As per my analysis at comment 8 it was the outband port
which glusterd uses to send requests to other glusterd instances which was
blocked.

I couldn't reproduce this problem on my fedora27 system with selinux mode
enabled.

[root at atinmu glusterfs]# sestatus
SELinux status:                 enabled
SELinuxfs mount:                /sys/fs/selinux
SELinux root directory:         /etc/selinux
Loaded policy name:             targeted
Current mode:                   enforcing
Mode from config file:          enforcing
Policy MLS status:              enabled
Policy deny_unknown status:     allowed
Memory protection checking:     actual (secure)
Max kernel policy version:      31
[root at atinmu glusterfs]# 
[root at atinmu glusterfs]# 
[root at atinmu glusterfs]# 
[root at atinmu glusterfs]# 
[root at atinmu glusterfs]# glusterd
[root at atinmu glusterfs]# cat /etc/fedora-release
Fedora release 27 (Twenty Seven)


[root at atinmu glusterfs]# gluster v create test-vol x.x.x.x:/tmp/b{1..4} force
volume create: test-vol: success: please start the volume to access data
[root at atinmu glusterfs]# gluster v start test-vol
volume start: test-vol: success
[root at atinmu glusterfs]# gluster v status
Status of volume: test-vol
Gluster process                             TCP Port  RDMA Port  Online  Pid
------------------------------------------------------------------------------
Brick 192.168.0.106:/tmp/b1                 49152     0          Y       22410
Brick 192.168.0.106:/tmp/b2                 49153     0          Y       22431
Brick 192.168.0.106:/tmp/b3                 49154     0          Y       22452
Brick 192.168.0.106:/tmp/b4                 49155     0          Y       22473

Task Status of Volume test-vol
------------------------------------------------------------------------------
There are no active volume tasks

[root at atinmu glusterfs]# netstat -nap | grep 49151
tcp        0      0 x.x.x.x:24007     x.x.x.x:49151     ESTABLISHED
21932/glusterd      
tcp        0      0 x.x.x.x:49151     x.x.x.x:24007     ESTABLISHED
22410/glusterfsd   

x.x.x.x - same IP only

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