[GEOREPLICATION] gsyncd is broken due to ConfigParser's readfp() being removed in Python 3.12

[hunter86bg]

Description of problem:
In python 3.12 readfp() was completely removed and this leads to broken georeplication:

Traceback (most recent call last):
  File "/usr/libexec/glusterfs/python/syncdaemon/gsyncd.py", line 325, in <module>
    main()
  File "/usr/libexec/glusterfs/python/syncdaemon/gsyncd.py", line 251, in main
    gconf.load(GLUSTERFS_CONFDIR + "/gsyncd.conf",
  File "/usr/libexec/glusterfs/python/syncdaemon/gsyncdconfig.py", line 469, in load
    _gconf = Gconf(default_conf, custom_conf, args, extra_tmpl_args,
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/libexec/glusterfs/python/syncdaemon/gsyncdconfig.py", line 58, in __init__
    self._load()
  File "/usr/libexec/glusterfs/python/syncdaemon/gsyncdconfig.py", line 184, in _load
    conf.readfp(f)
    ^^^^^^^^^^^
debug2: channel 1: written 708 to efd 7
debug2: channel 1: rcvd ext data 90
AttributeError: 'RawConfigParser' object has no attribute 'readfp'. Did you mean: 'read'?

The exact command to reproduce the issue:

gluster volume geo-replication MASTER_VOL SLAVE_HOST::SLAVE_VOL create ssh-port 2222 push-pem

The full output of the command that failed:
Both /usr/libexec/glusterfs/python/syncdaemon/gsyncd.py & /usr/libexec/glusterfs/python/syncdaemon/gsyncdconfig.py traceback with:

AttributeError: 'RawConfigParser' object has no attribute 'readfp'. Did you mean: 'read'?

Expected results:
Georep to work

**- Provide logs present on following locations of client and server nodes -
/var/log/glusterfs/geo-replication/sourcevol_glusterdest_destvol/gsyncd.log:

[2024-08-28 22:03:01.21992] E [syncdutils(monitor):845:errlog] Popen: command returned error [{cmd=ssh -oPasswordAuthentication=no -oStrictHostKeyChecking=no -i /var/lib/glusterd/geo-replication/secret.pem -p 22 geoaccount@glusterdest /usr/sbin/gluster --xml --remote-host=localhost volume info destvol}, {error=255}]
[2024-08-28 22:03:01.22327] E [syncdutils(monitor):363:log_raise_exception] <top>: FAIL: 
Traceback (most recent call last):
  File "/usr/libexec/glusterfs/python/syncdaemon/gsyncd.py", line 317, in main
    func(args)
  File "/usr/libexec/glusterfs/python/syncdaemon/subcmds.py", line 60, in subcmd_monitor
    return monitor.monitor(local, remote)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/libexec/glusterfs/python/syncdaemon/monitor.py", line 360, in monitor
    return Monitor().multiplex(*distribute(local, remote))
                                ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/libexec/glusterfs/python/syncdaemon/monitor.py", line 319, in distribute
    svol = Volinfo(secondary.volume, "localhost", prelude, primary=False)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/libexec/glusterfs/python/syncdaemon/syncdutils.py", line 924, in __init__
    po.terminate_geterr()
  File "/usr/libexec/glusterfs/python/syncdaemon/syncdutils.py", line 894, in terminate_geterr
    self.errfail()
  File "/usr/libexec/glusterfs/python/syncdaemon/syncdutils.py", line 863, in errfail
    self.errlog()
  File "/usr/libexec/glusterfs/python/syncdaemon/syncdutils.py", line 853, in errlog
    ls = l.split(b'\n')
         ^^^^^^^^^^^^^^
TypeError: must be str or None, not bytes
[2024-08-28 22:03:50.549852] I [gsyncdstatus(monitor):247:set_worker_status] GeorepStatus: Worker Status Change [{status=Initializing...}]
[2024-08-28 22:03:50.550049] I [monitor(monitor):158:monitor] Monitor: starting gsyncd worker [{brick=/bricks/vol1/brick1}, {secondary_node=glusterdest}]
[2024-08-28 22:03:50.609439] I [resource(worker /bricks/vol1/brick1):1388:connect_remote] SSH: Initializing SSH connection between primary and secondary...
[2024-08-28 22:03:50.885106] E [syncdutils(worker /bricks/vol1/brick1):325:log_raise_exception] <top>: connection to peer is broken
[2024-08-28 22:03:50.887006] E [syncdutils(worker /bricks/vol1/brick1):845:errlog] Popen: command returned error [{cmd=ssh -oPasswordAuthentication=no -oStrictHostKeyChecking=no -i /var/lib/glusterd/geo-replication/secret.pem -p 2244 -oControlMaster=auto -S /tmp/gsyncd-aux-ssh-412ta4ms/79631bd47986f88da08bc1d5dca64585.sock geoaccount@glusterdest /nonexistent/gsyncd secondary sourcevol geoaccount@glusterdest::destvol --primary-node glustersource --primary-node-id f0ccb358-2aa3-4a45-9103-52432f030a26 --primary-brick /bricks/vol1/brick1 --local-node glusterdest --local-node-id 77c4b6aa-3653-40e9-8176-4c80bf287712 --secondary-timeout 120 --secondary-log-level INFO --secondary-gluster-log-level INFO --secondary-gluster-command-dir /usr/sbin --primary-dist-count 1}, {error=1}]
[2024-08-28 22:03:50.889987] I [monitor(monitor):218:monitor] Monitor: worker died before establishing connection [{brick=/bricks/vol1/brick1}]

- The operating system / glusterfs version:
rpm -qa | grep glusterfs-server
glusterfs-server-11.1-1.fc39.x86_64

[hunter86bg]

@aravindavk , can you check the change ?

[sulphur]

I've been searching for that solution for past few days. We are upgrading ubutnu to 24.04 and Gluster 11.1 and indeed Geo-replicaion is broken and i've tested by manually replacing these functions names from readfp to read_file and that seems to fix the problem. Thanks @hunter86bg for finding that. Hope it will get patched soon