#ceph IRC Log

Index

IRC Log for 2015-04-23

Timestamps are in GMT/BST.

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[0:22] <t4nk551> Hi Folks! I was wondering if the Hammer release is considered production ready or if we should stick to firefly for a new ceph cluster?
[0:23] <t4nk551> Hammer looks like it has a bunch of RADOS/rbd performance increases that we'd like to take advantage of, but we don't want to risk corruption/data loss/downtime
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[0:38] <flaf> t4nk551: Hammer is the stable and LTS release. For a new cluster, you should use Hammer.
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[0:47] <Kingrat> t4nk551, what flaf said
[0:47] <cephuser> Thanks!
[0:47] <cephuser> We have a cluster on Giant at the moment
[0:48] <cephuser> We'll upgrade to Hammer
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[0:53] <rkeene> flaf, http://ceph.com/resources/downloads/ still features Giant.
[0:54] <rkeene> The picture says "GIANT", the link that says "DOWNLOAD HAMMER SOURCE" links to ceph-0.87.1 (Giant) ...
[0:54] <gleam> pretty much just the image though
[0:54] <gleam> fun
[0:54] <rkeene> gleam, No, also the link to the source
[0:55] <gleam> oh yeah. but the packages are correct
[0:55] <gleam> and docs
[0:55] <gleam> god times
[0:55] <gleam> good
[0:55] <rkeene> Not that useful for those of us who build packages :-)
[0:55] <rkeene> Amateur hour, really.
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[1:50] <Nats_> t4nk551, fwiw we are in same position as you and will not be upgrading until at least .3 or .4
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[4:15] <wkennington> uh oh, stuck starting up osd's :/
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[4:51] <achieva> hi
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[4:52] <achieva> how can I redistribute PGs when I remove some osds?
[4:52] <anon> hello has anyone use ceph-ansible to deploy a ceph cluster before?
[4:52] <achieva> After removing some OSDs, even I cannot launch rados bench :(
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[7:11] <achieva> How can I redistribute PGs in pool when I remove some osds?
[7:12] <achieva> I remove osd by "ceph osd rm" & "ceph osd crush rm"
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[7:12] <achieva> I thought it is enough to remove osd, but entire ceph does not work anymore.
[7:14] <achieva> I want to redistribute PGs in each pool. Is there any specific commands to re-balance it?
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[7:45] <Nats_> achiva, you might like to pastebin your ceph -s
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[8:02] <winston-d> PG stuck in 'creating' forever, what could possibily go wrong?
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[8:22] <achieva> self answer, "ceph osd lost & ceph pg force_create_pg" can redistribute pgs.
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[8:46] <stalob> for some test i have turned off all my machines hosting my osds ...and all my osd are still up and usable...is that's something normal?
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[8:50] <Be-El> hi
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[9:05] <achieva> after remove osd and forcely create pg
[9:05] <achieva> there are some stuck messages appear. "pg 8.f8 is stuck unclean since forever, current state creating, last acting []"
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[9:07] <achieva> But it takes significantly long time. (even 10m later, any pgs are not created.)
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[9:08] <achieva> does creating pg take long time originally?
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[9:10] <Be-El> nope
[9:10] <Be-El> how many osds do you have, and what replication size do you use for the affected pool?
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[9:10] <achieva> osd:2, size:1
[9:11] <Be-El> size or min_size?
[9:11] <achieva> since I want to test only rados performance without replication overhead
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[9:11] <achieva> every size & min_size (related to replica) are 1
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[9:12] <achieva> is there limitation on pg numbers of each osd?
[9:12] <Be-El> ok, so the problem is not related to the number of osds
[9:13] <achieva> hmm....
[9:13] <Be-El> not a hard limit afaik, but each pg consumes memory, and starting with the hammer release the osds complains if more than 300 pgs are stored on them
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[9:13] <Be-El> is only one pg affected?
[9:14] <achieva> there are 517 creating
[9:14] <achieva> 517 pgs still stuck on creating state
[9:16] <Be-El> how many pgs do you have overall?
[9:17] <achieva> First, I started with 24 OSDS, and I continously remove OSDs (22) (now only 2 osds are in & up).
[9:17] <achieva> pool : 7 8 | SUM
[9:17] <achieva> --------------------------------
[9:17] <achieva> osd.0 91 45 | 136
[9:17] <achieva> osd.1 69 46 | 115
[9:17] <achieva> --------------------------------
[9:17] <achieva> SUM : 160 91 |
[9:17] <achieva> I have 768pgs in my cluster
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[9:17] <achieva> pool A with 512 pgs, pool B with 256 pgs
[9:18] <Be-El> do you use the default crush ruleset or a custom one?
[9:19] <achieva> I just use default ruleset
[9:19] <achieva> rule_name: "replicated_ruleset", ruleset:0
[9:20] <Be-El> and pgs from both pools are affected?
[9:20] <achieva> yes
[9:20] <achieva> pgs from both pool stuck in creating state
[9:21] <Be-El> does the number of stuck pgs decrease over time? or is it constant?
[9:21] <achieva> constant
[9:22] <achieva> during 30minutes
[9:22] <Be-El> there's a setting defining a timespan between creating a PG on the same OSD (mon pg create interval), but this is probably not related to your problem
[9:23] <Be-El> are there any messages in the osd logs or mon logs related to the stuck pgs?
[9:23] <Be-El> or slow requests?
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[9:26] <stalob> for some test i have turned off all my machines hosting my osds ...and all my osd are still up and usable...is that's something normal?
[9:26] <achieva> I turned off debug messages related to osd (to remove logging overheads). So I only get some messages from monitor
[9:27] <achieva> messages from monitor do not give me any hints. It just tell "517 creating, 251 active+clean;........"
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[9:28] <Be-El> achieva: sorry, but I'm running out of ideas
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[9:28] <achieva> Be-El, no problem, thanks for your time :)
[9:29] <Be-El> stalob: did you set noout or nodown?
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[9:37] <achieva> Be-El, BTW, what is a unit of pg size? 1MB? or 2MB? I cannot find this value in the ceph configuration fil.
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[9:38] <Be-El> achieva: it is just a count without a unit
[9:38] <Be-El> achieva: or do you refer to the output of ceph pg dump?
[9:40] <achieva> the most curious thing is that! when I refer to the output of ceph pg dump, each pg has different size.
[9:41] <achieva> When I read the paper (CRUSH, RADOS, and others), I thought that each object is mapped into each pg and each pg has static size (defined by configuration or others)
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[9:42] <Be-El> achieva: objects are distributed based on their name's hash sum and the number of pg
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[9:42] <Be-El> achieva: the distribution is not perfect
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[9:43] <Be-El> and one object is mapped to one pg. large objects are usually splitted into smaller ones (striping), and each of them is distributed separately
[9:43] <achieva> Be-El, Oh I see:). I think I should re-read CRUSH paper
[9:43] <Be-El> that's at least how I understood the crush stuff
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[9:45] <achieva> hmm. is striping used for pg, isn't it?
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[9:45] <achieva> Ah, I missed it. thanks:)
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[9:47] <Be-El> striping is used at an upper layer
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[10:03] <Be-El> achieva: I just had another idea regarding your stuck PGs. You said you've remove most of the osds from the cluster. do they still show up in the crush tree?
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[10:21] <achieva> Be-El, in "ceph osd tree"?
[10:21] <achieva> yes but it marked down and out
[10:22] <Be-El> achieva: ok. it's just a guess, but if you remove them completely, all PGs may be created correctly
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[10:23] <achieva> Be-El, does "ceph osd crush rm osd.*" remove the osd entry in crush map?
[10:23] <Be-El> achieva: the crush algorithm selects a osd based on the crush ruleset. if the selected osd is not available (e.g. down), it should retry. the number of retries is limited (afaik 20 per default)
[10:23] <Be-El> achieva: that command removes the osd from the crush map, yes. you also need to remove its key and the osd entry itself
[10:24] <achieva> Be-El, Oh!!! you're right! after I remove osd nodes in crush map, all problem solved!
[10:24] <achieva> oh!!!!
[10:24] <achieva> Be-El, thank you so much :) :)
[10:25] <Be-El> you're welcome
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[10:26] <Be-El> afk for a meeting *sigh*
[10:26] <achieva> good luck :)
[10:27] <stalob> good meeting
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[12:25] <theanalyst> does ceph-deploy disk list kind of stop listing after listing about 10 disks?
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[13:13] <alfredodeza> theanalyst: there is a bug I just fixed
[13:13] <alfredodeza> not yet released
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[13:15] <alfredodeza> theanalyst: issue 11347
[13:15] <kraken> alfredodeza might be talking about http://tracker.ceph.com/issues/11347 [Inconsistent "ceph-deploy disk list" command results]
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[14:00] <hellertime> is there a status doc on the state of namespace support in ceph? my google-fu is coming up short.
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[14:02] <zviratko> hi, can someone explain crash_replay_interval parameter? I don't fully understand what it does from the docs...
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[14:44] <MaZ-> hmm... aside from setting up radosgw-agent, is there a way to dump and restore all radosgw users from 1 cluster to another?
[14:44] <theanalyst> alfredodeza: ah thanks.. I initially thought it was something wrong with my server
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[15:10] <winston-d_> Be-El: ping
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[15:11] <winston-d_> Be-El: I saw you help achieva solved his/her stuck pg problem, wonder if I could borrow your wisdom as well.
[15:11] <winston-d_> Be-El: I am in similar situation, all my PGs are stuck in 'creating' state, for hours (days).
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[15:15] <alfredodeza> theanalyst: a sucky workaround would be to just `ssh mynode sudo ceph-disk list`
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[15:22] <zviratko> any idea if qemu option "cache=unsafe" in combination with rbd cache preserves IO ordering?
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[16:02] <xcezzz> sweet alfred!
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[16:05] <hellertime> what is the syntax for setting up caps on multiple pools? I tried: ceph auth caps client.foo osd 'allow rw pool=a pool=b', but this resulted in permission errors, can multiple pools even be specified?
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[16:49] <joelm> We have an old Emperor install and seems like rbd export doesn't create sparse files (it does on giant at least). Is there anything I could put in a pipeline to make the raw files sparse?
[16:49] <joelm> reticent to upgrade as it's in production and works
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[17:02] <winston-d_> loicd: ping
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[17:10] <georgem> If I change the replication level for a pool, it will apply to existing objects as well?
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[17:37] <winston-d_> georgem: i think so
[17:39] <georgem> ok, so if I change a pool from replica 2 to replica 3 there will be a lot of data movement..how abut if I change from 3 to 2 ?
[17:40] <winston-d_> lots of data removement. ;)
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[17:45] <loicd> winston-d_: pong
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[17:57] <winston-d_> loicd: i rebuilt a cluster but found not possible to create new pool 'cos all PGs are stuck at 'creating' state, any idea where shall i look for root cause?
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[17:57] <winston-d_> loicd: this cluster used to work just fine, i rebuilt it to change the cluster name.
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[17:58] <andrew> is there a way to disable the default rbd pool from being created when deploying a new cluster?
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[18:27] <loicd> winston-d_: can you paste2.org a ceph pg dump ?
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[18:41] <winston-d_> loicd: sure. part of the pg dump output: http://paste2.org/bm7dtsPx
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[18:41] <winston-d_> loicd: every single pg is stuck at state like this
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[18:42] <loicd> it looks like the crush ruleset was unable to find any OSD
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[18:42] <loicd> winston-d_: you should look in this direction
[18:42] <loicd> the ruleset may be bugous
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[18:44] <Tetard> is that bogus and buggy at the same time ? :D
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[18:49] <winston-d_> loicd: something obvious in crush rules simple like this? http://paste2.org/Hs3C0AIh
[18:50] <loicd> winston-d_: ceph osd dump
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[18:50] <loicd> winston-d_: are you positive this rule is used ?
[18:50] <scuttlemonkey> the monthly Ceph Tech Talk is starting in about 10m -- http://ceph.com/ceph-tech-talks/
[18:51] <winston-d_> loicd: this is the only rule i have
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[18:52] <loicd> winston-d_: what does ceph osd dump says regarding the pools in which the PG are not getting any OSD ?
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[18:59] <winston-d_> loicd: pool 10 'rbd1' replicated size 3 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 100 pgp_num 100 last_change 2923 flags hashpspool stripe_width 0
[19:00] <loicd> the PG you show are
[19:00] <loicd> 8.77 0 0 0 0 0 0 0 creating 0.000000 0'0 0:0 [] -1 [] -1 0'0 0.000000 0'0 0.000000
[19:00] <loicd> i.e. pool 8 if I'm not mistaken ?
[19:00] <winston-d_> loicd: any other pools I created looks the same
[19:01] <winston-d_> no matter pool 8,9,10
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[19:01] <loicd> can you show pool 8 ? Maybe there is adetail ?
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[19:02] <winston-d_> pool 8 'test1' replicated size 2 min_size 1 crush_ruleset 0 object_hash rjenkins pg_num 256 pgp_num 256 last_change 2923 flags hashpspool stripe_width 0
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[19:06] <murdock> hi
[19:07] <murdock> how can i delete image when there is still watchers without rebooting the server?
[19:08] <murdock> http://pastebin.com/raw.php?i=uJ1va0Rq
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[19:11] <murdock> hello
[19:13] <murdock> anyone?
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[19:16] <murdock> help
[19:16] <SpaceDump> rbd status <imagename> should give you a list of the watchers..
[19:16] <murdock> yes, i see the watchers but i can't reboot the node with that ip address
[19:17] <murdock> any other thing that i can do?
[19:17] <SpaceDump> Logon to the box and try to run rbd unmap ?
[19:18] <SpaceDump> (I'm mostly guessing here since I only have a really small test install and trying to figure out if this is something I should try out for real shortly or not) :>
[19:19] <murdock> # rbd -p images showmapped
[19:19] <murdock> rbd: could not open /sys/bus/rbd/devices: (2) No such file or directory
[19:19] <murdock> rbd: showmapped failed: (2) No such file or directory
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[19:20] <murdock> i'm in deep trouble again
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[19:36] <eburrows> Hi All, is anyone else seeing a SSL certificate mis-match when trying to do a ceph-deploy install this morning? I'm getting a cert common name of sni.dreamhost.com, but wget is expecting git.ceph.com.
[19:37] <eburrows> > ERROR: certificate common name `sni.dreamhost.com' doesn't match requested host name `git.ceph.com'.
[19:38] <alfredodeza> eburrows: that sounds like a bug
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[19:39] <alfredodeza> eburrows: would you mind getting me a full paste ?
[19:39] <eburrows> Sure:
[19:39] <eburrows> ceph@r2-node21:~$ ceph-deploy install r2-node21 r2-node22 r2-node23 r2-node25 r1-node21 r1-node22 r1-node23 r1-node24 r2-node26
[19:39] <eburrows> [ceph_deploy.conf][DEBUG ] found configuration file at: /home/ceph/.cephdeploy.conf
[19:39] <eburrows> [ceph_deploy.cli][INFO ] Invoked (1.5.23): /usr/bin/ceph-deploy install r2-node21 r2-node22 r2-node23 r2-node25 r1-node21 r1-node22 r1-node23 r1-node24 r2-node26
[19:39] <eburrows> [ceph_deploy.install][DEBUG ] Installing stable version hammer on cluster ceph hosts r2-node21 r2-node22 r2-node23 r2-node25 r1-node21 r1-node22 r1-node23 r1-node24 r2-node26
[19:39] <eburrows> [ceph_deploy.install][DEBUG ] Detecting platform for host r2-node21 ...
[19:39] <eburrows> [r2-node21][DEBUG ] connection detected need for sudo
[19:39] <eburrows> [r2-node21][DEBUG ] connected to host: r2-node21
[19:39] <eburrows> [r2-node21][DEBUG ] detect platform information from remote host
[19:39] <eburrows> [r2-node21][DEBUG ] detect machine type
[19:39] <eburrows> [ceph_deploy.install][INFO ] Distro info: Ubuntu 12.04 precise
[19:39] <eburrows> [r2-node21][INFO ] installing ceph on r2-node21
[19:39] <eburrows> [r2-node21][INFO ] Running command: sudo env DEBIAN_FRONTEND=noninteractive apt-get -q install --assume-yes ca-certificates
[19:40] <eburrows> [r2-node21][DEBUG ] Reading package lists...
[19:40] <eburrows> [r2-node21][DEBUG ] Building dependency tree...
[19:40] <eburrows> [r2-node21][DEBUG ] Reading state information...
[19:40] <eburrows> [r2-node21][DEBUG ] ca-certificates is already the newest version.
[19:40] <eburrows> [r2-node21][DEBUG ] The following packages were automatically installed and are no longer required:
[19:40] <eburrows> [r2-node21][DEBUG ] python-flask libcephfs1 libtcmalloc-minimal0 python-six python-ceph
[19:40] <eburrows> [r2-node21][DEBUG ] libgoogle-perftools0 python-urllib3 python-markupsafe python-jinja2
[19:40] <eburrows> [r2-node21][DEBUG ] python-werkzeug python-requests libunwind7
[19:40] <eburrows> [r2-node21][DEBUG ] Use 'apt-get autoremove' to remove them.
[19:40] <eburrows> [r2-node21][DEBUG ] 0 upgraded, 0 newly installed, 0 to remove and 130 not upgraded.
[19:40] <eburrows> [r2-node21][INFO ] Running command: sudo wget -O release.asc https://ceph.com/git/?p=ceph.git;a=blob_plain;f=keys/release.asc
[19:40] <eburrows> [r2-node21][WARNIN] --2015-04-23 10:35:03-- https://ceph.com/git/?p=ceph.git;a=blob_plain;f=keys/release.asc
[19:40] <eburrows> [r2-node21][WARNIN] Resolving ceph.com (ceph.com)... 208.113.241.137, 2607:f298:4:147::b05:fe2a
[19:40] <eburrows> [r2-node21][WARNIN] Connecting to ceph.com (ceph.com)|208.113.241.137|:443... connected.
[19:40] <eburrows> [r2-node21][WARNIN] HTTP request sent, awaiting response... 301 Moved Permanently
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[19:40] <eburrows> [r2-node21][WARNIN] Location: https://git.ceph.com/?p=ceph.git;a=blob_plain;f=keys/release.asc [following]
[19:40] <eburrows> [r2-node21][WARNIN] --2015-04-23 10:35:07-- https://git.ceph.com/?p=ceph.git;a=blob_plain;f=keys/release.asc
[19:40] <eburrows> [r2-node21][WARNIN] Resolving git.ceph.com (git.ceph.com)... 67.205.20.121
[19:40] <eburrows> [r2-node21][WARNIN] Connecting to git.ceph.com (git.ceph.com)|67.205.20.121|:443... connected.
[19:40] <eburrows> [r2-node21][WARNIN] ERROR: cannot verify git.ceph.com's certificate, issued by `/C=US/O=DreamHost/CN=sni.dreamhost.com':
[19:40] <eburrows> [r2-node21][WARNIN] Self-signed certificate encountered.
[19:40] <eburrows> [r2-node21][WARNIN] ERROR: certificate common name `sni.dreamhost.com' doesn't match requested host name `git.ceph.com'.
[19:40] <eburrows> [r2-node21][WARNIN] command returned non-zero exit status: 5
[19:40] <eburrows> [r2-node21][INFO ] Running command: sudo apt-key add release.asc
[19:40] <eburrows> [r2-node21][WARNIN] gpg: no valid OpenPGP data found.
[19:41] <eburrows> [r2-node21][ERROR ] RuntimeError: command returned non-zero exit status: 2
[19:41] <eburrows> [ceph_deploy][ERROR ] RuntimeError: Failed to execute command: apt-key add release.asc
[19:41] <eburrows> END
[19:41] <eburrows> Seems like a server-side misconfiguration to me, but I'd be happy to disable cert checking in order to get this installed, as it's not for production use.
[19:42] <off_rhoden> wow. next time try out fpaste.org or similar please. :)
[19:42] <off_rhoden> anyways, yeah something is weird there. I just ran the same command and had no issue
[19:42] <off_rhoden> but it is true that changes are happening there. The SSL cert for git.ceph.com has just been installed in the last couple of hours...
[19:43] <andrew> hi, is there a way to disable the default rbd pool from being created when deploying a new cluster?
[19:43] <eburrows> off_rhoden, did your run of ceph-deploy download the release.asc file, as mine did?
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[19:43] <off_rhoden> eburrows: I didn't run ceph-deploy, just the command.
[19:44] <off_rhoden> eburrows: i.e. "wget -O release.asc https://ceph.com/git/?p=ceph.git;a=blob_plain;f=keys/release.asc"
[19:44] <off_rhoden> but until today, git.ceph.com didn't work with https, but it seems to now, so there may indeed me something wrong
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[19:45] <eburrows> off_rhoden: when I run the command manually, it errors out as above, but advices I can use the --no-check-certificate option to work-around, which works fine.
[19:46] <eburrows> I'll try firewalling off port 443, and see if I can force it to HTTP...
[19:46] <off_rhoden> eburrows: I just checked the cert in a broswer, and the CN is git.ceph.com. I wonder if you caught it in transition or something
[19:46] <off_rhoden> but it *should* be working. :)
[19:47] <eburrows> Could also be my company's "transparent" firewall. Will dig some more.
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[19:47] <off_rhoden> eburrows: cool. also the cert I see is not self-signed, it's legit
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[19:52] <rkeene> One thing to note is that git.ceph.com requires the TLS extension for SNI, which many things still lack support for.
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[20:06] <eburrows> off_rhoden: I re-ran the wget from my house (without creepy corporate firewall) and got the same cert error, but I was able to get ceph-deploy to work by manually downloading the key to a file, and specifying it to ceph-deploy with --gpg-url file://...
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[20:32] <off_rhoden> eburrows: thanks for pointing out the issues you hit. I think a fix is being worked on now, as it is not just you. :)
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[20:33] <Tetard> had the same issues...
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[22:26] <vilobhmm123> Unable to update stats, RBDDriver -1.1.0 ??driver is uninitialized mostly we get this when the volume_driver is not specified in cinder.conf right i am seeing this consistently on 2014.1.3 tag any suggestions ?
[22:26] <vilobhmm123> i think i have made the needed changes in cinder.conf
[22:26] <vilobhmm123> to enable it
[22:27] <vilobhmm123> "Unable to update stats, RBDDriver -1.1.0 driver is uninitialized."
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[22:27] <vilobhmm123> any suggestions ?
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[22:39] <cholcombe> ceph: has anyone tried deploying an nfsv4 ganesha setup?
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[22:47] <loicd> winston-d: there must be some kind of error message in the monitors logs that provide a hint about why it cannot get any OSD
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[23:11] <vilobhmm123> loicd :
[23:11] <vilobhmm123> 1:26
[23:11] <vilobhmm123> Unable to update stats, RBDDriver -1.1.0 ??driver is uninitialized mostly we get this when the volume_driver is not specified in cinder.conf right i am seeing this consistently on 2014.1.3 tag any suggestions ?
[23:11] <vilobhmm123> i think i have made the needed changes in cinder.conf
[23:11] <vilobhmm123> to enable it
[23:11] <vilobhmm123> 1:27
[23:11] <vilobhmm123> "Unable to update stats, RBDDriver -1.1.0 ??driver is uninitialized."
[23:11] * dyasny (~dyasny@173.231.115.58) Quit (Ping timeout: 480 seconds)
[23:13] <loicd> vilobhmm123: the question is not precise enough for me to answer it, I'm sorry
[23:15] * fauxhawk (~Coe|work@5NZAAB3CR.tor-irc.dnsbl.oftc.net) Quit ()
[23:15] <vilobhmm123> ok
[23:16] <vilobhmm123> who might be the right person to talk to loicd ^^
[23:16] * kysse (kysse@empty.zpm.fi) Quit (Ping timeout: 480 seconds)
[23:17] <loicd> vilobhmm123: i suggest you phrase the question so that someone with the necessary knowledge can answer. It's sometime difficult to do that. But it's a great way to get the right answer.
[23:19] <vilobhmm123> "Unable to update stats, RBDDriver -1.1.0 ??driver is uninitialized." want to know why can we get this loicd ?
[23:20] <loicd> I don't understand the question, sorry about that
[23:22] * OutOfNoWhere (~rpb@199.68.195.102) Quit (Ping timeout: 480 seconds)
[23:23] <vilobhmm123> loicd : i see this in cinder-volume logs "Unable to update stats, RBDDriver -1.1.0 ??driver is uninitialized.
[23:23] <vilobhmm123> jfyi
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