#ceph IRC Log

Index

IRC Log for 2014-08-25

Timestamps are in GMT/BST.

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[1:17] <tremon> http://paste.debian.net/117332/ -- any idea why ceph-osd exits immediately with return value 134?
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[3:09] <davidz> tremon: You got a SIGABRT which usually is an assert or direct call to abort(). I don't know why the log information you provided doesn't show anything.
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[4:15] <amatus> what do i need to do to make osd use less ram?
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[9:31] <tremon> ok thanks, I'll follow up on the mailing list
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[10:28] <Shmouel> Hello Ceph community!
[10:31] <Shmouel> Last night we added new hardware in our Ceph cluster, we have some pg blocked in degraded state
[10:31] <Shmouel> http://pastebin.com/A8Nidagf
[10:32] <Shmouel> is there anyone who know how to solve this kind of problem?
[10:32] <Sysadmin88> low disk space,
[10:32] <Shmouel> on monitor only
[10:33] <Shmouel> not on osd
[10:33] <Shmouel> thanks Sysadmin88 for answering me ;)
[10:33] <Sysadmin88> i'm hardly an expert. i just had a read and saw something easy to solve
[10:33] <andreask> Shmouel: any useful hints from "ceph pg x.y query"?
[10:34] <Sysadmin88> not the whole problem, just that warning
[10:34] <Shmouel> andreask: I will check it
[10:34] <Shmouel> Sysadmin88: yes we will solve this problem as weel
[10:34] <Shmouel> well*
[10:35] <Sysadmin88> warning says mon.04... how many mons do you have?
[10:35] <Shmouel> we have 7 mons
[10:35] <Sysadmin88> i thought more than 3 was counter productive unless your cluster was massive?
[10:35] <Shmouel> andreask: I will copy you the output of the first blocked pg
[10:36] <Shmouel> we have 32 osd
[10:37] <Shmouel> andreask: here it is http://paste.debian.net/117357/
[10:37] <Shmouel> for the pg 3.b2
[10:38] <Sysadmin88> i see waiting on backfill
[10:38] <Shmouel> yes but it does not backfilling...
[10:38] <Shmouel> :(
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[10:39] <Sysadmin88> you take out any hardware or have any fail?
[10:40] <Shmouel> just add new, no fail no out
[10:40] <Sysadmin88> were the pgs stuck before the upgrade?
[10:40] <andreask> Shmouel: and all osds are up?
[10:40] <Shmouel> all osd up
[10:41] <Shmouel> no stuck before upgrade
[10:41] <Shmouel> do you have any command I can pass to force recovery?
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[10:43] <Sysadmin88> whats your replica count?
[10:43] <Shmouel> 2
[10:44] <Sysadmin88> could those PGs have been corrupted but not scrubbed yet?
[10:44] <andreask> Shmouel: firefly?
[10:45] <Shmouel> yes andreask
[10:45] <Shmouel> ceph -v
[10:45] <Shmouel> ceph version 0.80.5 (38b73c67d375a2552d8ed67843c8a65c2c0feba6)
[10:47] <andreask> hmm ... are you using the rbd kernel module somewhere?
[10:47] <Shmouel> yes
[10:47] <Shmouel> many :p
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[10:48] <Shmouel> VM disks
[10:48] <Shmouel> and physical partitions
[10:48] <Shmouel> maybe after reboot...
[10:48] <Shmouel> it will solve the problem
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[10:49] <andreask> I was just asking because I solved such issue by changing the crush tuning profile ... but this can cause problems with the rbd kernel module
[10:52] <Shmouel> how you change it?
[10:52] <Shmouel> --enable-unsafe-tunables ?
[10:56] <andreask> like ... ceph osd crush tunables {PROFILE} ... e.g. 'optimal' ... but don't do this if you have too old rbd kernel module
[10:56] <Sysadmin88> could he do it to repair and then undo it or would the issue reoccur?
[10:56] <Shmouel> Just did tunable optimal....
[10:56] <Shmouel> data are moving :p
[10:56] <Shmouel> recovery io 444 MB/s, 118 objects/s
[10:57] <Shmouel> but 20% degraded
[10:57] <Shmouel> will take a while, I will inform you when its done
[10:57] <Shmouel> and if it solved the problem
[10:57] <Shmouel> ;)
[10:57] <andreask> good ;-)
[10:58] <Sysadmin88> what does the optimal setting do to the old RBD modules?
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[11:00] <andreask> they don't work anymore because of "feature-mismatch"
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[12:05] <WintermeW> Hi, is there a way to make S3 gateway to use a bucket acl as default acl for the objects contained in it ( canned ACLs won't do the trick here)
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[13:41] <longguang> how to troubleshoot 'osd is down', actualy it is up, authed
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[13:41] <longguang> ceph osd tree :4 0.01999 osd.4 down 1
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[16:40] <alphe> hello all is there anyone to talk about benefits and problems of erasure code compared to replicated ?
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[16:44] <seapasul1i> alphe: benefit would be you get more space per raw storage while still maintaining some reliability as well. Outside of that I do not really see any.
[16:44] <guppy> EC is generally slower as well I believe
[16:45] <seapasul1i> yup more compute overhead so must be slower.
[16:46] <alphe> hum ..
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[16:47] <alphe> actually i have a big problem i can t use a rbd image to cycle data in it
[16:47] <alphe> because replicas keep expanding an eating new space
[16:47] <alphe> and i can t add osd every 2 weeks
[16:48] <alphe> i have 36TB overall available space in my ceph cluster
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[16:48] <seapasul1i> how big is your rbd?
[16:49] <alphe> if i split it to 18TB and make a rbd image of that size then I get problems even if the disk is not full
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[16:51] <kitz> you'll have to keep the data in your cluster under the near_full percentage.
[16:51] <alphe> if i get this upload /delete sequence upload 15 TB (Replicas are 15TB so overall space is 30TB) then delet 5TB (replicas and data are unchanged) then i upload another 5TB (data then = 18 TB because 3TB where added to empty space and 2TB of deleted space was overwriten but replicas are around 20TB and my osd are all full and then ceph cluster is stuck )
[16:52] <kitz> alphe: you've simply provisioned more space than you really have.
[16:53] <kitz> There isn't (to my knowledge) good discard/trim support for RBD yet.
[16:53] <alphe> if i split the available space to 16TB or even 13TB i still get the same problem
[16:54] <kitz> alphe: when you made your rbd image how big did you create it? e.g. `rbd create --size XXX`
[16:55] <alphe> so i have to reset ceph cluster after each use ... I create a rbd image poor the client data there then instead of deleting files using the os which will have no effect on replicas I have to rbd rm the image that has the effect of removing the replicas
[16:56] <alphe> but that enhance the mentencion time ... and for a odd reason rbd image type 2 using snap / clone mechanic hangs moun.ceph when i try to mount them ...
[16:56] <alphe> kitz depend initially I tryed with 18TB space problems surfaced right away
[16:57] <kitz> image size * replicas <= raw space * near_full percentage
[16:57] <alphe> then i tryed 16TB same problems surfaced a reasonably time later (some month instead of a couple of weeks)
[16:58] <kitz> or 36TB * .85 = 30.6 / 3x repicas = 10.2TB max
[16:58] <kitz> *replicas
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[16:58] <alphe> then I tryed 13TB and still the same issue arise ... since replicas are never deleted overwriting trimed etc it s a problem i discussed with sage on the mailing list and he said we know the issue and until we don t fix it we don t know
[16:59] <alphe> kitz I use replica size 2
[16:59] <alphe> so it should be half
[16:59] * scuttle|afk is now known as scuttlemonkey
[16:59] <kitz> and you're doing snapshots?
[16:59] <alphe> a bit less than half but anyway ... it is hard to convince people to buy stuff to get only a third of the space they wanted
[16:59] <alphe> kitz nope
[17:00] <alphe> the replicas are evergrowing that is the main issue there the rbd image data are overwritten by the os since the data in it is considered by it as freed
[17:01] <kitz> yeah. then it looks like you're just waiting for this: http://tracker.ceph.com/issues/190
[17:02] <kitz> (along with me, too)
[17:02] <alphe> kitz yes because what ever the size is my rbd image soon or later the replicas will be more important than the rbd image max size
[17:03] <alphe> kitz i already saw for a 13TB image size a replicas size of 23TB ... with replica size being 2 for that pool
[17:04] <kitz> alphe: I can't speak to how/why that happens. Haven't seen it myself.
[17:04] <alphe> what means target version changed from v0.82 to v0.85 does it means in actual v0.85 it was released ?
[17:05] <alphe> kitz according to sage it s clearly because replicas are not deleted
[17:06] <alphe> sure I could create a 2TB rbd image for each client project and then have the rbd image deleted and actually really free data (or recycling disk space)
[17:07] <alphe> but that will make my management more complicated ... and since i can t use rbd image snap / clone to make image creation smoother then it will be time consuming too
[17:09] <alphe> ideally my initial way to deal the problem was to create an empty rbd image type 2 of 2tb formated in xfs then do a snap shot of it empty and clone that image/snap as needed to store client data the time needed them rm the image but for some odd reason mounting a clone image hang mount.ceph all i see in logs is that the mount.ceph is waiting for an osd to reply but all osd are working properly ...
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[17:14] <alphe> have to go now
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[17:30] <seapasul1i> ceph -w
[17:30] <seapasul1i> oops wrong window :p
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[19:04] <flaf> Hi, I'm testing ceph with "public network = 172.31.0.0/16" and "cluster network = 192.168.0.0/24". I can see traffic between OSDs on the "public network". Is it normal? I thought the OSDs discussed only via the "cluster" network...
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[19:04] <devicenull> they'll communicate on both
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[19:07] <flaf> Ah... ok, thx. I thought the OSDs used the "public" network *just* for the clients.
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[19:08] <devicenull> I'm not sure how much traffic they do over tbh
[19:08] <devicenull> but at the very least they check each other's health via both networks
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[19:08] <flaf> Ok, it's logical, thx devicenull.
[19:10] <flaf> But, just OSDs use the "cluster" network, not Ceph mon? Is that correct?
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[19:12] <andrew_> hello, have anyone been successful in deploying ceph with chef?
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[19:48] <angdraug> I'm slightly confused by this bug: http://tracker.ceph.com/issues/7410
[19:48] <angdraug> do I read this right that rgw doesn't do any bulk operations?
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[19:53] <gregsfortytwo1> that ticket applies to the Calamari REST API, not to rgw
[19:54] <gregsfortytwo1> ???but I can't think of any bulk operations in the S3 API
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[20:27] <hasues> I see rhel7 packages for firefly. Are there plans for centos7 packages for firefly to be listed?
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[20:31] <angdraug_mobile> gregsfortytwo1: there are bulk op
[20:31] <angdraug_mobile> erations in swift
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[20:32] <angdraug_mobile> https://www.swiftstack.com/docs/admin/middleware/bulk.html
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[20:37] <Venturi> Could data saved through different interfaces, let's say RadosGW and RBD, could be saved to different RADOS OSDs, or CRUSH algorith decides which data to be put to which OSD within PG?
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[20:42] <llpamies> I'm using ArchLinux and the "vstart.sh" script hangs while doing "osd create", however, the same code works in Debian/Ubuntu. Does someone know what can be missing in Arch?
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[20:57] <angdraug> gregsfortytwo: looks like S3 also has bulk delete:
[20:57] <angdraug> http://s3browser.com/s3-multi-object-delete.php
[20:59] <kenil> Hello, I see a ???x.x.x.105:6814/7311 >> x.x.x.18:0/3774009855 pipe(???).accept peer addr is really x.x.x.18:0/3774009855 (socket is x.x.x.18:51345/0) in my osd log. x.x.x.105 is the ip address of my osd. and on client???s dmesg, I see ???osd x.x.x.105:6814 socket error on write???. When I shutdown that osd, this same thing happens on the new osd. Please give me a pointer on this.
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[21:41] <qhartman> I'm having a problem with my ceph cluster where I'm getting inconsistent pgs pretty frequently
[21:41] <qhartman> any suggestions as the best way to run down the root cause?
[21:43] <PerlStalker> qhartman: Which version on ceph?
[21:44] <qhartman> Emperor I believe
[21:44] <qhartman> I'll need to double check
[21:44] <qhartman> also, it looks like I may be hitting this: http://tracker.ceph.com/issues/8241 based on what I'm seeing in the logs
[21:45] <qhartman> 0.79, so yeah I think that's Emperor.
[21:46] <PerlStalker> qhartman: The latest firefly release has a fix for a pg corruption bug on XFS.
[21:47] <qhartman> That certainly sounds promising
[21:47] <qhartman> Do you have a link to more info? I'd like to confirm that I'm hitting it before embarking on an upgrade that may or may not fix thigns
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[21:49] <PerlStalker> qhartman: I don't have one handy. It was fixed on v0.80.4.
[21:50] <qhartman> Cool, I should be able to dig up the changelogs with that
[21:51] <PerlStalker> As I recall, the bug was introduced in firefly but I may be wrong.
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[21:53] <qhartman> Huh, the bug referenced in the changelog for that item has basically zero info in it
[21:53] <qhartman> :-\
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[21:55] <qhartman> Though it sounds like moving to Firefly would be a good thing regardless. I didn't realize .79 was more like a dev RC when I deployed. I thought it was just the latest emperor release.
[21:55] <qhartman> womp womp
[21:55] <kraken> http://www.sadtrombone.com/?play=true
[21:55] <qhartman> heh
[21:56] <PerlStalker> qhartman: See the thread on the users list with the subject "scrub error on firefly"
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[21:58] <qhartman> definitely sounds like what I'm seeing
[22:00] <kenil> I see some activity so I am reposting :) I see a ???x.x.x.105:6814/7311 >> x.x.x.18:0/3774009855 pipe(???).accept peer addr is really x.x.x.18:0/3774009855 (socket is x.x.x.18:51345/0) in my osd log. x.x.x.105 is the ip address of my osd. and on client???s dmesg, I see ???osd x.x.x.105:6814 socket error on write???. When I shutdown that osd, this same thing happens on the new osd. Please give me a pointer on this.
[22:01] <hasues> Is the syntax not "ceph-deploy install --repo-url <URL> --gpg-url <URL> install <host>?
[22:01] <kenil> I also realized that there are a lot of connections at TIME_WAIT
[22:01] <alfredodeza> hasues: it is, only if you need it
[22:02] <hasues> alfredodeza: I'm getting an error suggesting that I'm not providing enough arguments
[22:02] <alfredodeza> ah
[22:02] <alfredodeza> you are spaecifying double install arguments
[22:02] <alfredodeza> hasues: check your syntax again, remove one `install` :)
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[22:03] <hasues> ah
[22:03] <hasues> Drat, well, I did, and I still get the same thing
[22:03] <hasues> $ ceph-deploy install --repo-url http://ceph.com/rpm-firefly/rhel7/noarch --gpg-url https://ceph.com/git/?p=ceph.git;a=blob_plain;f=keys/release.asc ceph-admin ceph-node1 ceph-node2 ceph-node
[22:04] <alfredodeza> that looks correct
[22:04] <alfredodeza> can you get me a paste of the output?
[22:04] <hasues> one sec.
[22:05] <hasues> https://dpaste.de/Sy5v
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[22:12] <magicrob1tmonkey> can someone help me translate this:
[22:12] <magicrob1tmonkey> sudo ceph mds stat
[22:12] <magicrob1tmonkey> e58: 1/1/1 up {0=mds=up:active}
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[22:19] <hasues> magicrob1tmonkey: are you trying to delete MDS?
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[22:20] <seapasul1i> what's 1/1/1 in mds stat?
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[22:20] <seapasul1i> or 0-mds=up. I have a very similar output but not sure what 1/1/1 is. I have 5 monitors so I know it's not that.
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[22:21] <seapasul1i> e##: I am assuming is epoch number. And 0=$(PrimaryMDSServer=status:status)
[22:22] <seapasul1i> So if you have multiple I am assuming the array on the end changes to include the rest like (5=PrimaryMDSHostname=up:active)
[22:23] <hasues> 0 is mds0
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[22:23] <hasues> oh well nvm, I thought I understood it :P
[22:24] <seapasul1i> hasues: whats 1/1/1?
[22:24] <magicrob1tmonkey> hasues: nope, just trying to use it
[22:24] <magicrob1tmonkey> i'm wailing on the fs pretty hard but the mds isn't doing anything
[22:25] <magicrob1tmonkey> oh yea mds is the hostname
[22:25] <magicrob1tmonkey> ok thats what confused me
[22:25] <magicrob1tmonkey> thansk, seapasul1i
[22:25] <seapasul1i> np, glad I could help!
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[22:54] <scuttlemonkey> kevincox: around?
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