On Sun, 3 Aug 2014, Bruce McFarland wrote: > Is there a recommended way to take every thing down and restart the > process? I was considering starting completely from scratch ie OS > reinstall and then using Ceph-deploy as before. If you're using ceph-deploy, then ceph-deploy purge HOST ceph-deploy purgedata HOST will do it. Then remove the ceph.* (config and keyring) files from the current directory. > I've learned a lot and want to figure out a fool proof way I can > document for others in our lab to bring up a cluster on new HW. I learn > a lot more when I break things and have to figure out what went wrong so > its a little frustrating, but I've found out a lot about verifying the > configuration and debug options so far. My intent is to investigate rbd > usage, perf, and configuration options. > > The "endless loop" I'm referring to is a constant stream of fault > messages that I'm not yet familiar on how to interpret. I have let them > run to see if the cluster recovers, but Ceph-mon always crashed. I'll > look for the crash dump and save it since kdump should be enabled on the > monitor box. Do you have one of the messages handy? I'm curious whether it is an OSD or a mon. Thanks! sage > Thanks for the feedback. > > > > On Aug 3, 2014, at 8:30 AM, "Sage Weil" <sweil at redhat.com> wrote: > > > > Hi Bruce, > > > >> On Sun, 3 Aug 2014, Bruce McFarland wrote: > >> Yes I looked at tcpdump on each of the OSDs and saw communications between > >> all 3 OSDs before I sent my first question to this list. When I disabled > >> selinux on the one offending server based on your feedback (typically we > >> have this disabled on lab systems that are only on the lab net) the 10 pages > >> in my test pool all went to ?active+clean? almost immediately. Unfortunately > >> the 3 default pools still remain in the creating states and are not > >> health_ok. The OSDs all stayed UP/IN after the selinux change for the rest > >> of the day until I made the mistake of creating a RBD image on demo-pool and > >> it?s 10 ?active+clean? pages. I created the rbd, but when I attempted to > >> look at it with ?rbd info? the cluster went into an endless loop trying to > >> read a placement group and loop that I left running overnight. This morning > > > > What do you mean by "went into an endless loop"? > > > >> ceph-mon was crashed again. I?ll probably start all over from scratch once > >> again on Monday. > > > > Was there a stack dump in the mon log? > > > > It is possible that there is a bug with pool creation that surfaced > > by having selinux in place for so long, but otherwise this scenario > > doesn't make much sense to me. :/ Very interested in hearing more, > > and/or whether you can reproduce it. > > > > Thanks! > > sage > > > > > >> > >> > >> > >> I deleted ceph-mds and got rid of the ?laggy? comments from ?ceph health?. > >> The ?official? online Ceph docs on that ?coming soon? and most references I > >> could find were pre firefly so it was a little trail and error to figure out > >> to use the pool number and not it?s name to get the removal to work. Same > >> with ?ceph mds newfs? to get rid of ?laggy-ness? in the ?ceph health? > >> output. > >> > >> > >> > >> [root at essperf3 Ceph]# ceph mds rm 0 mds.essperf3 > >> > >> mds gid 0 dne > >> > >> [root at essperf3 Ceph]# ceph health > >> > >> HEALTH_WARN 96 pgs incomplete; 96 pgs peering; 192 pgs stuck inactive; 192 > >> pgs stuck unclean mds essperf3 is laggy > >> > >> [root at essperf3 Ceph]# ceph mds newfs 1 0 --yes-i-really-mean-it > >> > >> new fs with metadata pool 1 and data pool 0 > >> > >> [root at essperf3 Ceph]# ceph health > >> > >> HEALTH_WARN 96 pgs incomplete; 96 pgs peering; 192 pgs stuck inactive; 192 > >> pgs stuck unclean > >> > >> [root at essperf3 Ceph]# > >> > >> > >> > >> > >> > >> > >> > >> From: Brian Rak [mailto:brak at gameservers.com] > >> Sent: Friday, August 01, 2014 6:14 PM > >> To: Bruce McFarland; ceph-users at lists.ceph.com > >> Subject: Re: [ceph-users] Firefly OSDs stuck in creating state forever > >> > >> > >> > >> What happens if you remove nodown? I'd be interested to see what OSDs it > >> thinks are down. My next thought would be tcpdump on the private interface. > >> See if the OSDs are actually managing to connect to each other. > >> > >> For comparison, when I bring up a cluster of 3 OSDs it goes to HEALTH_OK > >> nearly instantly (definitely under a minute!), so it's probably not just > >> taking awhile. > >> > >> Does 'ceph osd dump' show the proper public and private IPs? > >> > >> On 8/1/2014 6:13 PM, Bruce McFarland wrote: > >> > >> MDS: I assumed that I?d need to bring up a ceph-mds for my > >> cluster at initial bringup. We also intended to modify the CRUSH > >> map such that it?s pool is resident to SSD(s). It is one of the > >> areas of the online docs there doesn?t seem to be a lot of info > >> on and I haven?t spent a lot of time researching. I?ll stop it. > >> > >> > >> > >> OSD connectivity: The connectivity is good for both 1GE and > >> 10GE. I thought moving to 10GE with nothing else on that net > >> might help with group placement etc and bring up the pages > >> quicker. I?ve checked ?tcpdump? output on all boxes. > >> > >> Firewall: Thanks for that one - it?s the ?basic? I over looked > >> in my ceph learning curve. One of the OSDs had selinux=enforcing > >> ? all others were disabled. Changing that box and the 10 pages > >> in my demo-pool (kept page count very small for sanity) are now > >> ?active+clean?. The pages for the default pools ? data, > >> metadata, rbd ? are still stuck in creating+peering or > >> creating+incomplete. I did have to use manually set ?osd pool > >> default min size = 1? from it?s default of 2 for these 3 pools > >> to eliminate a bunch of warnings in the ?ceph health detail? > >> output. > >> > >> I?m adding the [mon] setting you suggested below and stopping > >> ceph-mds and bringing everything up now. > >> > >> [root at essperf3 Ceph]# ceph -s > >> > >> cluster 4b3ffe60-73f4-4512-b7da-b04e4775dd73 > >> > >> health HEALTH_WARN 96 pgs incomplete; 96 pgs peering; 192 > >> pgs stuck inactive; 192 pgs stuck unclean; 28 requests are > >> blocked > 32 sec; nodown,noscrub flag(s) set > >> > >> monmap e1: 1 mons at {essperf3=209.243.160.35:6789/0}, > >> election epoch 1, quorum 0 essperf3 > >> > >> mdsmap e43: 1/1/1 up {0=essperf3=up:creating} > >> > >> osdmap e752: 3 osds: 3 up, 3 in > >> > >> flags nodown,noscrub > >> > >> pgmap v1483: 202 pgs, 4 pools, 0 bytes data, 0 objects > >> > >> 134 MB used, 1158 GB / 1158 GB avail > >> > >> 96 creating+peering > >> > >> 10 active+clean > >> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<!!!!!!!! > >> > >> 96 creating+incomplete > >> > >> [root at essperf3 Ceph]# > >> > >> > >> > >> From: Brian Rak [mailto:brak at gameservers.com] > >> Sent: Friday, August 01, 2014 2:54 PM > >> To: Bruce McFarland; ceph-users at lists.ceph.com > >> Subject: Re: [ceph-users] Firefly OSDs stuck in creating state > >> forever > >> > >> > >> > >> Why do you have a MDS active? I'd suggest getting rid of that at > >> least until you have everything else working. > >> > >> I see you've set nodown on the OSDs, did you have problems with the > >> OSDs flapping? Do the OSDs have broken connectivity between > >> themselves? Do you have some kind of firewall interfering here? > >> > >> I've seen odd issues when the OSDs have broken private networking, > >> you'll get one OSD marking all the other ones down. Adding this to my > >> config helped: > >> > >> [mon] > >> mon osd min down reporters = 2 > >> > >> > >> On 8/1/2014 5:41 PM, Bruce McFarland wrote: > >> > >> Hello, > >> > >> I?ve run out of ideas and assume I?ve overlooked something > >> very basic. I?ve created 2 ceph clusters in the last 2 > >> weeks with different OSD HW and private network fabrics ? > >> 1GE and 10GE. I have never been able to get the OSDs to > >> come up to the ?active+clean? state. I have followed your > >> online documentation and at this point the only thing I > >> don?t think I?ve done is modifying the CRUSH map (although > >> I have been looking into that). These are new clusters > >> with no data and only 1 HDD and 1 SSD per OSD (24 2.5Ghz > >> cores with 64GB RAM). > >> > >> > >> > >> Since the disks are being recycled is there something I > >> need to flag to let ceph just create it?s mappings, but > >> not scrub for data compatibility? I?ve tried setting the > >> noscrub flag to no effect. > >> > >> > >> > >> I also have constant OSD flapping. I?ve set nodown, but > >> assume that is just masking a problem that still > >> occurring. > >> > >> > >> > >> Besides the lack of ever reaching ?active+clean? state > >> ceph-mon always crashes after leaving it running > >> overnight. The OSDs all eventually fill /root with with > >> ceph logs so I regularly have to bring everything down > >> Delete logs and restart. > >> > >> > >> > >> I have all sorts of output from the ceph.conf; osd boot > >> ouput with ?debug osd -= 20? and ?debug ms = 1?; ceph ?w > >> output; and pretty much all of the debug/monitoring > >> suggestions from the online docs and 2 weeks of google > >> searches from online references in blogs, mailing lists > >> etc. > >> > >> > >> > >> [root at essperf3 Ceph]# ceph -v > >> > >> ceph version 0.80.1 > >> (a38fe1169b6d2ac98b427334c12d7cf81f809b74) > >> > >> [root at essperf3 Ceph]# ceph -s > >> > >> cluster 4b3ffe60-73f4-4512-b7da-b04e4775dd73 > >> > >> health HEALTH_WARN 96 pgs incomplete; 106 pgs > >> peering; 202 pgs stuck inactive; 202 pgs stuck unclean; > >> nodown,noscrub flag(s) set > >> > >> monmap e1: 1 mons at > >> {essperf3=209.243.160.35:6789/0}, election epoch 1, quorum > >> 0 essperf3 > >> > >> mdsmap e43: 1/1/1 up {0=essperf3=up:creating} > >> > >> osdmap e752: 3 osds: 3 up, 3 in > >> > >> flags nodown,noscrub > >> > >> pgmap v1476: 202 pgs, 4 pools, 0 bytes data, 0 > >> objects > >> > >> 134 MB used, 1158 GB / 1158 GB avail > >> > >> 106 creating+peering > >> > >> 96 creating+incomplete > >> > >> [root at essperf3 Ceph]# > >> > >> > >> > >> Suggestions? > >> > >> Thanks, > >> > >> Bruce > >> > >> > >> > >> > >> > >> _______________________________________________ > >> > >> ceph-users mailing list > >> > >> ceph-users at lists.ceph.com > >> > >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >> > >> > >> > >> > >> > >> > >
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