> mount / df simply prints the monmap. It doesn't print what you added when you mounted the filesystem. > > Totally normal behavior.
Not true again, df only show what IP or IPs you added when mounting, also mount 10.189.11.138:6789:/sharefs_prod/8c285b3b59a843b6aab623314288ee36 2.8P 108T 2.7P 4% /mnt/slc_cephFS_8c285b3b59a843b6aab623314288ee36 10.135.3.136:6789:/sharefs_prod/8c285b3b59a843b6aab623314288ee36 2.7P 91T 2.6P 4% /mnt/lvs_cephFS_8c285b3b59a843b6aab623314288ee36 But we do have 5/7 mons for each cluster. 2017-03-02 7:42 GMT+08:00 Xiaoxi Chen <superdebu...@gmail.com>: > >Still applies. Just create a Round Robin DNS record. The clients will > obtain a new monmap while they are connected to the cluster. > > It works to some extent, but causing issue for "mount -a". We have such > deployment nowaday, a GTM(kinds of dns) record created with all MDS ips and > it works fine in terms of failover/ mount. > > But, user usually automation such mount by fstab and even, "mount -a " are > periodically called. With such DNS approach above, they will get mount > point busy message every time. Just due to mount.ceph resolve the DNS name > to another IP, and kernel client was feeling like you are trying to attach > another fs... > > > > 2017-03-02 0:29 GMT+08:00 Wido den Hollander <w...@42on.com>: > >> >> > Op 1 maart 2017 om 16:57 schreef Sage Weil <s...@newdream.net>: >> > >> > >> > On Wed, 1 Mar 2017, Wido den Hollander wrote: >> > > > Op 1 maart 2017 om 15:40 schreef Xiaoxi Chen < >> superdebu...@gmail.com>: >> > > > >> > > > >> > > > Well , I think the argument here is not all about security gain, it >> just >> > > > NOT a user friendly way to let "df" show out 7 IPs of >> monitors....Much >> > > > better if they seeing something like "mycephfs.mydomain.com". >> > > > >> > > >> > > mount / df simply prints the monmap. It doesn't print what you added >> when you mounted the filesystem. >> > > >> > > Totally normal behavior. >> > >> > Yep. This *could* be changed, though: modern kernels have DNS >> resolution >> > capability. Not sure if all distros compile it in, but if so, >> mount.ceph >> > could first try to pass in the DNS name and only do the DNS resolution >> if >> > the kernel can't. And the kernel client could be updated to remember >> the >> > DNS name and use that. It's a bit friendlier, but imprecise, since DNS >> > might change. What does NFS do in this case? (Show an IP or a name?) >> > >> >> A "df" will show the entry as it's in the fstab file, but mount will show >> the IPs as well. >> >> But Ceph is a different story here due to the monmap. >> >> Wido >> >> > sage >> > >> > >> > > > And using DNS give you the flexibility of changing your monitor >> quorum >> > > > members , without notifying end user to change their fstab entry , >> or >> > > > whatever mount point record. >> > > > >> > > >> > > Still applies. Just create a Round Robin DNS record. The clients will >> obtain a new monmap while they are connected to the cluster. >> > > >> > > Wido >> > > >> > > > 2017-03-01 18:46 GMT+08:00 gjprabu <gjpr...@zohocorp.com>: >> > > > >> > > > > Hi Robert, >> > > > > >> > > > > This container host will be provided to end user and we don't >> want to >> > > > > expose this ip to end users. >> > > > > >> > > > > Regards >> > > > > Prabu GJ >> > > > > >> > > > > >> > > > > ---- On Wed, 01 Mar 2017 16:03:49 +0530 *Robert Sander >> > > > > <r.san...@heinlein-support.de <r.san...@heinlein-support.de>>* >> wrote ---- >> > > > > >> > > > > On 01.03.2017 10:54, gjprabu wrote: >> > > > > > Hi, >> > > > > > >> > > > > > We try to use host name instead of ip address but mounted >> partion >> > > > > > showing up address only . How show the host name instead of ip >> address. >> > > > > >> > > > > What is the security gain you try to achieve by hiding the IPs? >> > > > > >> > > > > Regards >> > > > > -- >> > > > > Robert Sander >> > > > > Heinlein Support GmbH >> > > > > Schwedter Str. 8/9b, 10119 Berlin >> > > > > >> > > > > http://www.heinlein-support.de >> > > > > >> > > > > Tel: 030 / 405051-43 >> > > > > Fax: 030 / 405051-19 >> > > > > >> > > > > Zwangsangaben lt. §35a GmbHG: >> > > > > HRB 93818 B / Amtsgericht Berlin-Charlottenburg, >> > > > > Geschäftsführer: Peer Heinlein -- Sitz: Berlin >> > > > > >> > > > > _______________________________________________ >> > > > > ceph-users mailing list >> > > > > ceph-users@lists.ceph.com >> > > > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > > > >> > > > > >> > > > > >> > > > > _______________________________________________ >> > > > > ceph-users mailing list >> > > > > ceph-users@lists.ceph.com >> > > > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > > > >> > > > > >> > > > _______________________________________________ >> > > > ceph-users mailing list >> > > > ceph-users@lists.ceph.com >> > > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > _______________________________________________ >> > > ceph-users mailing list >> > > ceph-users@lists.ceph.com >> > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > >> > >
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