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glusterfs:volfile_server option can be used in smb.conf to define where to fetch the volfile from. Currently it supports only a single IP or a hostname. The default is 'localhost'. glfs_set_volfile_server() has been enhanced in gfapi to support multiple invocations. A list is maintained in libgfapi which gets appended on every invocation. When glfs_init is performed, libgfapi would first try to fetch the volfile from glusterd on that node. However, on failure to fetch the volfile, it would proceed to contact glusterd on every node in the list until it gets the volfile or exhausts the list. This enhacement was done in Gluster commit [2]. This commit is available in 3.6, 3.7, 3.8 versions of Gluster. As we cannot have multiple lines having the same key of glusterfs:volfile_server in a share definition in smb.conf, we propose a scheme like this: where value of glusterfs:volfile_server could be list of white space seperated elements where each element could be unix+/path/to/socket/file or [tcp+]IP|hostname|\[IPv6\][:port]. Note the restriction on naming a IPv6 host, it follows the same restriction that is based on IPv6 naming in URL as per RFC 2732[1]. [1] http://www.ietf.org/rfc/rfc2732.txt [2] 0c1d78f5c52c69268ec3a1d8d5fcb1a1bf15f243 Signed-off-by: Raghavendra Talur <rtalur@redhat.com> Reviewed-by: Jeremy Allison <jra@samba.org> Reviewed-by: Michael Adam <obnox@samba.org> Reviewed-by: Guenther Deschner <gd@samba.org> Autobuild-User(master): Günther Deschner <gd@samba.org> Autobuild-Date(master): Fri Oct 14 17:09:24 CEST 2016 on sn-devel-144 |
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