The issue isn't so much mounting the ceph client as it is the mounted ceph client becoming unusable requiring a remount. So far so good though. On Fri, Sep 5, 2014 at 5:53 PM, JIten Shah <jshah2005 at me.com> wrote: > We ran into the same issue where we could not mount the filesystem on the > clients because it had 3.9. Once we upgraded the kernel on the client node, > we were able to mount it fine. FWIW, you need kernel 3.14 and above. > > --jiten > > On Sep 5, 2014, at 6:55 AM, James Devine <fxmulder at gmail.com> wrote: > > No messages in dmesg, I've updated the two clients to 3.16, we'll see if > that fixes this issue. > > > On Fri, Sep 5, 2014 at 12:28 AM, Yan, Zheng <ukernel at gmail.com> wrote: > >> On Fri, Sep 5, 2014 at 8:42 AM, James Devine <fxmulder at gmail.com> wrote: >> > I'm using 3.13.0-35-generic on Ubuntu 14.04.1 >> > >> >> Was there any kernel message when the hang happened? We have fixed a >> few bugs since 3.13 kernel, please use 3.16 kernel if possible. >> >> Yan, Zheng >> >> > >> > On Thu, Sep 4, 2014 at 6:08 PM, Yan, Zheng <ukernel at gmail.com> wrote: >> >> >> >> On Fri, Sep 5, 2014 at 3:24 AM, James Devine <fxmulder at gmail.com> >> wrote: >> >> > It took a week to happen again, I had hopes that it was fixed but >> alas >> >> > it is >> >> > not. Looking at top logs on the active mds server, the load average >> was >> >> > 0.00 the whole time and memory usage never changed much, it is using >> >> > close >> >> > to 100% and some swap but since I changed memory.swappiness swap >> usage >> >> > hasn't gone up but has been slowly coming back down. Same symptoms, >> the >> >> > mount on the client is unresponsive and a cat on >> >> > /sys/kernel/debug/ceph/*/mdsc had a whole list of entries. A umount >> and >> >> > remount seems to fix it. >> >> > >> >> >> >> which version of kernel do you use ? >> >> >> >> Yan, Zheng >> >> >> >> > >> >> > On Fri, Aug 29, 2014 at 11:26 AM, James Devine <fxmulder at gmail.com> >> >> > wrote: >> >> >> >> >> >> I am running active/standby and it didn't swap over to the >> standby. If >> >> >> I >> >> >> shutdown the active server it swaps to the standby fine though. >> When >> >> >> there >> >> >> were issues, disk access would back up on the webstats servers and a >> >> >> cat of >> >> >> /sys/kernel/debug/ceph/*/mdsc would have a list of entries whereas >> >> >> normally >> >> >> it would only list one or two if any. I have 4 cores and 2GB of >> ram on >> >> >> the >> >> >> mds machines. Watching it right now it is using most of the ram and >> >> >> some of >> >> >> swap although most of the active ram is disk cache. I lowered the >> >> >> memory.swappiness value to see if that helps. I'm also logging top >> >> >> output >> >> >> if it happens again. >> >> >> >> >> >> >> >> >> On Thu, Aug 28, 2014 at 8:22 PM, Yan, Zheng <ukernel at gmail.com> >> wrote: >> >> >>> >> >> >>> On Fri, Aug 29, 2014 at 8:36 AM, James Devine <fxmulder at gmail.com> >> >> >>> wrote: >> >> >>> > >> >> >>> > On Thu, Aug 28, 2014 at 1:30 PM, Gregory Farnum < >> greg at inktank.com> >> >> >>> > wrote: >> >> >>> >> >> >> >>> >> On Thu, Aug 28, 2014 at 10:36 AM, Brian C. Huffman >> >> >>> >> <bhuffman at etinternational.com> wrote: >> >> >>> >> > Is Ceph Filesystem ready for production servers? >> >> >>> >> > >> >> >>> >> > The documentation says it's not, but I don't see that >> mentioned >> >> >>> >> > anywhere >> >> >>> >> > else. >> >> >>> >> > http://ceph.com/docs/master/cephfs/ >> >> >>> >> >> >> >>> >> Everybody has their own standards, but Red Hat isn't supporting >> it >> >> >>> >> for >> >> >>> >> general production use at this time. If you're brave you could >> test >> >> >>> >> it >> >> >>> >> under your workload for a while and see how it comes out; the >> known >> >> >>> >> issues are very much workload-dependent (or just general >> concerns >> >> >>> >> over >> >> >>> >> polish). >> >> >>> >> -Greg >> >> >>> >> Software Engineer #42 @ http://inktank.com | http://ceph.com >> >> >>> >> _______________________________________________ >> >> >>> >> ceph-users mailing list >> >> >>> >> ceph-users at lists.ceph.com >> >> >>> >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >> >>> > >> >> >>> > >> >> >>> > >> >> >>> > I've been testing it with our webstats since it gets live hits >> but >> >> >>> > isn't >> >> >>> > customer affecting. Seems the MDS server has problems every few >> >> >>> > days >> >> >>> > requiring me to umount and remount the ceph disk to resolve. Not >> >> >>> > sure >> >> >>> > if >> >> >>> > the issue is resolved in development versions but as of 0.80.5 we >> >> >>> > seem >> >> >>> > to be >> >> >>> > hitting it. I set the log verbosity to 20 so there's tons of >> logs >> >> >>> > but >> >> >>> > ends >> >> >>> > with >> >> >>> >> >> >>> The cephfs client is supposed to be able to handle MDS takeover. >> >> >>> what's symptom makes you umount and remount the cephfs ? >> >> >>> >> >> >>> > >> >> >>> > 2014-08-24 07:10:19.682015 7f2b575e7700 10 mds.0.14 laggy, >> >> >>> > deferring >> >> >>> > client_request(client.92141:6795587 getattr pAsLsXsFs >> #10000026dc1) >> >> >>> > 2014-08-24 07:10:19.682021 7f2b575e7700 5 mds.0.14 is_laggy >> >> >>> > 19.324963 >> >> >>> > > 15 >> >> >>> > since last acked beacon >> >> >>> > 2014-08-24 07:10:20.358011 7f2b554e2700 10 mds.0.14 beacon_send >> >> >>> > up:active >> >> >>> > seq 127220 (currently up:active) >> >> >>> > 2014-08-24 07:10:21.515899 7f2b575e7700 5 mds.0.14 is_laggy >> >> >>> > 21.158841 >> >> >>> > > 15 >> >> >>> > since last acked beacon >> >> >>> > 2014-08-24 07:10:21.515912 7f2b575e7700 10 mds.0.14 laggy, >> >> >>> > deferring >> >> >>> > client_session(request_renewcaps seq 26766) >> >> >>> > 2014-08-24 07:10:21.515915 7f2b575e7700 5 mds.0.14 is_laggy >> >> >>> > 21.158857 >> >> >>> > > 15 >> >> >>> > since last acked beacon >> >> >>> > 2014-08-24 07:10:21.981148 7f2b575e7700 10 mds.0.snap >> check_osd_map >> >> >>> > need_to_purge={} >> >> >>> > 2014-08-24 07:10:21.981176 7f2b575e7700 5 mds.0.14 is_laggy >> >> >>> > 21.624117 >> >> >>> > > 15 >> >> >>> > since last acked beacon >> >> >>> > 2014-08-24 07:10:23.170528 7f2b575e7700 5 mds.0.14 >> handle_mds_map >> >> >>> > epoch 93 >> >> >>> > from mon.0 >> >> >>> > 2014-08-24 07:10:23.175367 7f2b532d5700 0 -- >> >> >>> > 10.251.188.124:6800/985 >> >> >>> > >> >> >> >>> > 10.251.188.118:0/2461578479 pipe(0x5588a80 sd=23 :6800 s=2 >> pgs=91 >> >> >>> > cs=1 >> >> >>> > l=0 >> >> >>> > c=0x2cbfb20).fault with nothing to send, going to standby >> >> >>> > 2014-08-24 07:10:23.175376 7f2b533d6700 0 -- >> >> >>> > 10.251.188.124:6800/985 >> >> >>> > >> >> >> >>> > 10.251.188.55:0/306923677 pipe(0x5588d00 sd=22 :6800 s=2 pgs=7 >> cs=1 >> >> >>> > l=0 >> >> >>> > c=0x2cbf700).fault with nothing to send, going to standby >> >> >>> > 2014-08-24 07:10:23.175380 7f2b531d4700 0 -- >> >> >>> > 10.251.188.124:6800/985 >> >> >>> > >> >> >> >>> > 10.251.188.31:0/2854230502 pipe(0x5589480 sd=24 :6800 s=2 >> pgs=881 >> >> >>> > cs=1 >> >> >>> > l=0 >> >> >>> > c=0x2cbfde0).fault with nothing to send, going to standby >> >> >>> > 2014-08-24 07:10:23.175438 7f2b534d7700 0 -- >> >> >>> > 10.251.188.124:6800/985 >> >> >>> > >> >> >> >>> > 10.251.188.68:0/2928927296 pipe(0x5588800 sd=21 :6800 s=2 pgs=7 >> cs=1 >> >> >>> > l=0 >> >> >>> > c=0x2cbf5a0).fault with nothing to send, going to standby >> >> >>> > 2014-08-24 07:10:23.184201 7f2b575e7700 10 mds.0.14 my >> compat >> >> >>> > compat={},rocompat={},incompat={1=base v0.20,2=client writeable >> >> >>> > ranges,3=default file layouts on dirs,4=dir inode in separate >> >> >>> > object,5=mds >> >> >>> > uses versioned encoding,6=dirfrag is stored in omap,7=mds uses >> >> >>> > inline >> >> >>> > data} >> >> >>> > 2014-08-24 07:10:23.184255 7f2b575e7700 10 mds.0.14 mdsmap >> compat >> >> >>> > compat={},rocompat={},incompat={1=base v0.20,2=client writeable >> >> >>> > ranges,3=default file layouts on dirs,4=dir inode in separate >> >> >>> > object,5=mds >> >> >>> > uses versioned encoding,6=dirfrag is stored in omap} >> >> >>> > 2014-08-24 07:10:23.184264 7f2b575e7700 10 mds.-1.-1 map says i >> am >> >> >>> > 10.251.188.124:6800/985 mds.-1.-1 state down:dne >> >> >>> > 2014-08-24 07:10:23.184275 7f2b575e7700 10 mds.-1.-1 peer mds >> gid >> >> >>> > 94665 >> >> >>> > removed from map >> >> >>> > 2014-08-24 07:10:23.184282 7f2b575e7700 1 mds.-1.-1 >> handle_mds_map >> >> >>> > i >> >> >>> > (10.251.188.124:6800/985) dne in the mdsmap, respawning myself >> >> >>> > 2014-08-24 07:10:23.184284 7f2b575e7700 1 mds.-1.-1 respawn >> >> >>> > 2014-08-24 07:10:23.184286 7f2b575e7700 1 mds.-1.-1 e: >> >> >>> > '/usr/bin/ceph-mds' >> >> >>> > 2014-08-24 07:10:23.184288 7f2b575e7700 1 mds.-1.-1 0: >> >> >>> > '/usr/bin/ceph-mds' >> >> >>> > 2014-08-24 07:10:23.184289 7f2b575e7700 1 mds.-1.-1 1: '-i' >> >> >>> > 2014-08-24 07:10:23.184290 7f2b575e7700 1 mds.-1.-1 2: >> >> >>> > 'ceph-cluster1-mds2' >> >> >>> > 2014-08-24 07:10:23.184291 7f2b575e7700 1 mds.-1.-1 3: >> >> >>> > '--pid-file' >> >> >>> > 2014-08-24 07:10:23.184292 7f2b575e7700 1 mds.-1.-1 4: >> >> >>> > '/var/run/ceph/mds.ceph-cluster1-mds2.pid' >> >> >>> > 2014-08-24 07:10:23.184293 7f2b575e7700 1 mds.-1.-1 5: '-c' >> >> >>> > 2014-08-24 07:10:23.184294 7f2b575e7700 1 mds.-1.-1 6: >> >> >>> > '/etc/ceph/ceph.conf' >> >> >>> > 2014-08-24 07:10:23.184295 7f2b575e7700 1 mds.-1.-1 7: >> '--cluster' >> >> >>> > 2014-08-24 07:10:23.184296 7f2b575e7700 1 mds.-1.-1 8: 'ceph' >> >> >>> > 2014-08-24 07:10:23.274640 7f2b575e7700 1 mds.-1.-1 exe_path >> >> >>> > /usr/bin/ceph-mds >> >> >>> > 2014-08-24 07:10:23.606875 7f4c55abb800 0 ceph version 0.80.5 >> >> >>> > (38b73c67d375a2552d8ed67843c8a65c2c0feba6), process ceph-mds, pid >> >> >>> > 987 >> >> >>> > 2014-08-24 07:10:49.024862 7f4c506ad700 1 mds.-1.0 >> handle_mds_map >> >> >>> > standby >> >> >>> > 2014-08-24 07:10:49.199676 7f4c506ad700 0 mds.-1.0 >> >> >>> > handle_mds_beacon >> >> >>> > no >> >> >>> > longer laggy >> >> >>> > 2014-08-24 07:10:50.215240 7f4c506ad700 1 mds.-1.0 >> handle_mds_map >> >> >>> > standby >> >> >>> > 2014-08-24 07:10:51.290407 7f4c506ad700 1 mds.-1.0 >> handle_mds_map >> >> >>> > standby >> >> >>> > >> >> >>> > >> >> >>> >> >> >>> Did you use active/standby MDS setup? Did the MDS use lots of >> memory >> >> >>> before it crashed? >> >> >>> >> >> >>> Regards >> >> >>> Yan, Zheng >> >> >>> >> >> >>> > >> >> >>> > _______________________________________________ >> >> >>> > ceph-users mailing list >> >> >>> > ceph-users at lists.ceph.com >> >> >>> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >> >>> > >> >> >> >> >> >> >> >> > >> >> > >> >> > _______________________________________________ >> >> > ceph-users mailing list >> >> > ceph-users at lists.ceph.com >> >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >> > >> > >> > >> > >> > _______________________________________________ >> > ceph-users mailing list >> > ceph-users at lists.ceph.com >> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > >> > > _______________________________________________ > ceph-users mailing list > ceph-users at lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > -------------- next part -------------- An HTML attachment was scrubbed... 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