#ceph IRC Log

Index

IRC Log for 2012-09-15

Timestamps are in GMT/BST.

[0:03] * pentabular (~sean@adsl-70-231-129-231.dsl.snfc21.sbcglobal.net) has joined #ceph
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[0:31] <nhmlap> I hate it when computers decide to spontaneously start booting while you are working in them.
[0:33] * dmick-mibbit (267a14e2@ircip1.mibbit.com) has left #ceph
[0:34] <Anticimex> well, don't work in them
[0:34] <Anticimex> ah, you really mean boot, not reboot? :)
[0:34] <nhmlap> Anticimex: yep. :)
[0:35] * nhmlap holding PCIE card and ready to install.
[0:35] <nhmlap> Wait, wtf? Why are the fans spinning up? no!!
[0:37] <vhasi> pull the power cord when working with hardware, mmmkay
[0:38] <nhmlap> vhasi: no ground if you do that.
[0:38] <dmick> yeah, but no shadow power with interesting effects on "hot"plug, either
[0:38] <nhmlap> and yes, I could ground to something else, but there is nothing convenient nearby.
[0:39] <dmick> eh. dissipate yourself on the metal of the chassis, you'll be fine
[0:39] <dmick> it doesn't have to be *ground*, it just has to be the same potential as the chassis
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[0:43] <Tv_> nhmlap: yeah modern mobos aren't really powered off unless you really power them off
[0:44] <Tv_> nhmlap: use the big 0/1 switch at the back, if the psu has one -- stays grounded, but sure as hell won't start up
[0:45] <nhmlap> Tv_: yeah, I don't think these little supermicro power supplies have switches.
[0:45] <Tv_> when i was dealing more with hardware, i had one of those antistatic & grounding wrist straps
[0:46] <nhmlap> I used to have a couple of those. They always disappear.
[0:46] <Tv_> now i just touch the metal sides of a computer and say a little prayer to gods of smoke before turning the computer off
[0:46] <dmick> psh. static straps are for the paranoid
[0:46] <nhmlap> Tv_: yeah, I usually just try to leave a finger or wrist or something touching a portion of the chassis.
[0:46] <Tv_> dmick: have we met?
[0:47] <dmick> *maybe* if my only job was replacing drives
[0:47] <dmick> hahahahahah
[0:47] <Tv_> nhmlap: it takes a while of buttrubbing or scuffling on carpet to build up much, so zapping yourself once before opening the box usually is enough
[0:47] <dmick> I had about five of them in their packaging on my desk at any given time at Sun :)
[0:48] <nhmlap> Tv_: Yeah, it's probably not a big deal in my basement with concrete floors. Upstairs we have some nice static inducing carpet.
[0:49] <nhmlap> extra plush
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[1:03] <Tv_> i've found some office chairs to be problematic
[1:03] <Tv_> i used to zap myself twice a day on cold finnish winters
[1:03] <Tv_> dry air
[1:06] <Tv_> angelinos: http://www.flickr.com/photos/tv42/7986802621/in/photostream
[1:07] <Tv_> (in case the inktankers haven't visited the other side of the building in a while)
[1:11] <dmick> yes. stay away from the Sepulveda Pass
[1:11] <dmick> it's going to be a huge mess
[1:31] * jlogan (~Thunderbi@72.5.59.176) Quit (Ping timeout: 480 seconds)
[1:35] <pentabular> Tv_: ceph-deploy: yours?
[1:35] <Tv_> pentabular: it's the thing i've been calling mkcephfs v2.0 for a while
[1:35] <dmick> hey, look at that on github
[1:35] <pentabular> aahh.. that clears up a little confusion from my first toe-dip
[1:36] <pentabular> already cloned it: awesome!
[1:36] <Tv_> don't trust the non-master branch yet, still rebasing
[1:36] <Tv_> and it really needs a ceph.git commit that's not in any release yet
[1:37] <pentabular> just looked at your pic of the brush fire and saw it was the same user from github.
[1:37] <pentabular> cheers!! :)
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[2:03] <noob2> is there a general backup strategy for ceph?
[2:04] <noob2> I love how ceph is developing but I could never convince my coworkers to install it without being able to backup to tape
[2:06] * steki-BLAH (~steki@212.200.243.39) Quit (Quit: Ja odoh a vi sta 'ocete...)
[2:07] <Tv_> noob2: take a snapshot, export
[2:07] <noob2> I was wondering if you could do that. that sounds awesome!
[2:08] <noob2> Tv_: how big of a ceph array are you running?
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[2:11] <Tv_> noob2: right now? 3 vms with 2*10GB ;)
[2:11] <noob2> :-)
[2:11] <Tv_> noob2: i'm a developer, i don't run services for real
[2:11] <noob2> gotcha
[2:11] * psomas (~psomas@inferno.cc.ece.ntua.gr) Quit (Ping timeout: 480 seconds)
[2:12] <noob2> I'm still just learning about ceph. discovered it coming from an openstack install
[2:15] <Tv_> i have to say, whenever anyone says "fencing" i always think of olympic fencing
[2:20] <pentabular> ah, but you see: I am not left handed!
[2:20] <gregaf> I know you can't tell, but I'm smiling under this mask
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[15:54] <EikiGQ> hey there, I'm was trying the 5 minute install of Ceph http://ceph.com/docs/master/start/quick-start/ on Ubuntu 12.04.1 LTS
[15:54] <EikiGQ> sudo service ceph start
[15:55] <EikiGQ> seems to do nothing and ceph health just hangs?
[15:55] <EikiGQ> clean OS. Did everything according to the install guide
[15:56] <EikiGQ> well except that the install forgets to mention that on ubuntu you have to do a : sudo passwd root
[15:56] <EikiGQ> because sudo mkcephfs -a -c /etc/ceph/ceph.conf -k ceph.keyring
[15:56] <EikiGQ> will try to connect with root.
[15:56] <EikiGQ> (and not ubuntu user)
[15:57] <EikiGQ> Anyone got any hints. Can't really move on to a a real cluster setup if the simplest example doesn't work...
[15:59] <exec> EikiGQ: hostname in ceph.cong should be exactly as output of 'hostname -s'
[15:59] <EikiGQ> ah
[16:00] <EikiGQ> ok that is very different from "hostname"
[16:00] <EikiGQ> like the doc says
[16:00] <EikiGQ> ubuntu@i-f83a9d88:/etc/ceph$ hostname -s
[16:00] <EikiGQ> i-f83a9d88
[16:00] <EikiGQ> ubuntu@i-f83a9d88:/etc/ceph$ hostname
[16:00] <EikiGQ> i-f83a9d88.csccloud.internal
[16:00] <EikiGQ> That and the "root passwd" setting should be added to the quick start guide :)
[16:01] <EikiGQ> I'm going to try that quickly.
[16:06] <EikiGQ> ah the root ssh situtation doesn't happen when the hostname is correct. Please add the "-s" option to the getting started doc
[16:06] <exec> btw, it looks like not ideal code:
[16:06] <exec> grep ^hostname /usr/lib64/ceph/ceph_common.sh
[16:06] <exec> hostname=`hostname | cut -d . -f 1`
[16:06] <exec> why there are not `hostname -s` ?
[16:07] <exec> and it differs from http://ceph.com/docs/master/start/quick-start/
[16:07] <EikiGQ> exec: Thanks for the help! Success - HEALTH - OK
[16:07] <exec> really )
[16:07] <exec> EikiGQ: np.
[16:07] <EikiGQ> the -s part made it work.
[16:08] <exec> EikiGQ: I know, I've spent some time during first ceph try to find the reason...
[16:09] <EikiGQ> exec: hehe such a little thing that simply breaks the whole idea of the 5 minute install. Very glad I find you here :)
[16:10] <exec> )
[16:11] <exec> yehudasa: could you please ask someone to fix it?
[16:13] <exec> hehe. Ubuntu 12.04.1 = 12x04.1 = ceph 48.1
[16:13] <exec> /made for each other
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[16:57] <EikiGQ> question: Any good guide for getting started with a production environment (for vm's)?
[16:58] <EikiGQ> and second question: autoreconf: `configure.ac' or `configure.in' is required. <- I get that when trying to follow the centos instructions for installing/building
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[17:00] <EikiGQ> CXXFLAGS="-g -O2" ./configure --prefix=/usr --sbindir=/sbin --localstatedir=/var --sysconfdir=/etc
[17:01] <EikiGQ> checking for uuid_parse in -luuid... no
[17:01] <EikiGQ> configure: error: in `/root/ceph/ceph':
[17:01] <EikiGQ> configure: error: libuuid not found
[17:02] <EikiGQ> but libuuid is installed (via yum install libuuid)
[17:03] <EikiGQ> libbuid -> yum install libuuid-devel
[17:03] <EikiGQ> going to check dependencies better...
[17:04] <EikiGQ> According to the docs libuuid and libkeysutil are just needed for Ubuntu...but I'm on Centos 6.2 :/
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[17:12] <EikiGQ> it might be this (this has to added to the centos build example): http://comments.gmane.org/gmane.comp.file-systems.ceph.devel/5813
[17:17] <EikiGQ> configure: error: libkeyutils not found
[17:17] <EikiGQ> this is on centos - what gives?
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[17:37] <exec> EikiGQ: keyutils-libs-devel
[17:39] <exec> EikiGQ: BuildRequires from my ceph.spec: boost-devel cryptopp-devel expat-devel fcgi-devel fuse-devel gcc-c++ gdbm git gperftools-devel gtk2-devel gtkmm24-devel keyutils-libs-devel libaio-devel libatomic_ops-devel libcurl-devel libedit-devel libtool libtool-ltdl-devel libuuid libuuid-devel perl pkgconfig
[17:40] <EikiGQ> thanks - I figured it out eventually from another build instruction for fedora...
[17:41] <EikiGQ> exec: I managed to build it (I think) with these deps:
[17:41] <EikiGQ> yum install gcc gcc-c++ make automake libtool expat expat-devel boost-devel nss-devel cryptopp cryptopp-devel libatomic_ops-devel fuse-devel gperftools-libs gperftools-devel libaio libaio-devel libedit libedit-devel libuuid-devel keyutils-libs-devel
[17:41] <EikiGQ> yum install rpm-build fuse-devel libtool libtool-ltdl-devel boost-devel libedit-devel git openssl-devel gcc-c++ btrfs-progs nss-util-devel.x86_64
[17:41] <EikiGQ> google-perftools-devel.x86_64 google-perftools.x86_64 libatomic_ops-devel.x86_64 gtkmm24-devel.x86_64 nss-devel.x86_64 libuuid-devel keyutils-libs-devel
[17:42] <EikiGQ> git submodule init and git submodule update
[17:42] <EikiGQ> were also the missing pieces
[17:43] <exec> enable epel repo
[17:43] <EikiGQ> exec: I have
[17:43] <EikiGQ> the instructions here are missing key pieces: http://ceph.com/wiki/Installing_on_RedHat_or_CentOS
[17:43] <EikiGQ> like the addition git stuff
[17:44] <exec> may be.
[17:44] * exec afk.
[17:44] <exec> good luck )
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[18:21] <EikiGQ> 012-09-15 16:18:28.543518 7f6707b9d780 -1 journal check: ondisk fsid 00000000-0000-0000-0000-000000000000 doesn't match expected f247010f-69c3-499a-90f8-1cdef653727e, invalid (someone else's?) journal
[18:21] <EikiGQ> 2012-09-15 16:18:28.543596 7f6707b9d780 -1 OSD::mkfs: FileStore::mkfs failed with error -22
[18:21] <EikiGQ> 2012-09-15 16:18:28.543622 7f6707b9d780 -1 ** ERROR: error creating empty object store in /var/lib/ceph/osd/ceph-0: (22) Invalid argumen
[18:21] <EikiGQ> this happens on centos 6.2 (built form stable source)
[18:21] <EikiGQ> sudo mkcephfs -a -c /etc/ceph/ceph.conf -k ceph.keyring
[18:21] <EikiGQ> ...
[18:22] <EikiGQ> After the build I was trying to follow the 5 minute install instructions and stopped there.
[18:23] <EikiGQ> exec: Any idea what that is?
[18:27] <EikiGQ> exec: 2012-09-15 16:18:28.543518 7f6707b9d780 -1 journal check: ondisk fsid 00000000-0000-0000-0000-000000000000 doesn't match expected f247010f-69c3-499a-90f8-1cdef653727e, invalid (someone else's?) journal
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[18:28] <EikiGQ> this looks like the problem...no idea what it mean :p
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[19:08] <EikiGQ> Fixed: the problem was that the osd's were not running from an xfs volume
[19:08] <EikiGQ> I symlinked the directories and the mkcephfs managed to finsish
[19:09] <EikiGQ> But...that saga continues. How should one start ceph on centos?
[19:09] <EikiGQ> ceph start just hangs it seems.
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[19:11] <EikiGQ> Simular like before on Ubuntu (except now I did use "hostname -s" for ceph.conf's hostname variable which worked on ubuntu)
[19:12] <EikiGQ> ceph version 0.48.1argonaut-28-g34d8eec (commit:34d8eec9e23edec174a96d16bf42a0b8df118183)
[19:20] <EikiGQ> Comparing with the ubuntu install I don't seem to have a service script in centos
[19:20] <EikiGQ> for service start ceph
[19:20] <EikiGQ> Should I just copy the one from ubuntu?
[19:23] <EikiGQ> YES
[19:23] <EikiGQ> victory :) Copied the startup script from ubuntu to centos.
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[23:35] <EikiGQ> Hey there. Today I managed to build, install and configure Ceph under CentOS 6.2. Took a while.
[23:36] <EikiGQ> Now I'm wondering what is the best setup for performance and HA with 32 disk storage servers connected together with Infiniband (and 1 Gbe)
[23:36] <EikiGQ> In my test setup I just did one hard drive per OSD - but this is probably not they way to do it?
[23:37] <ajm> with 32 disks per node, you'd need some significant CPU/memory to do one osd per disk
[23:37] <EikiGQ> yeah - not really what I want to do :)
[23:37] <ajm> but that was the recommended setup last time I looked,
[23:37] <ajm> and has some significant advantages
[23:38] <EikiGQ> each server has 32GB RAM and 16 cores so there is room to wiggle.
[23:38] <ajm> 16 cores or 16 cpu threads?
[23:38] <EikiGQ> 16 cores
[23:38] <ajm> like dual hexacores?
[23:38] <ajm> nice servers :)
[23:38] <EikiGQ> amd opterons 6128
[23:38] <EikiGQ> 64 bit.
[23:38] <ajm> amd, i take it back :P
[23:38] <EikiGQ> hehe
[23:39] <ajm> you should try/benchmark 1 disk/ods
[23:39] <ajm> osd
[23:39] <EikiGQ> ajm: like for i in 0 1; do ceph osd tell $i bench; done
[23:40] <EikiGQ> ajm: and ceph -w (in another session you mean)
[23:40] <ajm> well, i personally prefer some deper benchmarks :)
[23:40] <ajm> deeper
[23:41] <ajm> that's not horrible for an a/b comparison
[23:41] <ajm> you'll see fairly easily if your running out of memory/cpu on the OSDs
[23:42] <EikiGQ> ajm: ok
[23:43] <ajm> the actual ceph team (i'm not one of them — i'm not even using it these days) is generally around m->f
[23:45] <EikiGQ> ajm: good
[23:46] <EikiGQ> ajm: do you know any good article or guide with different osd setups?
[23:46] <EikiGQ> ajm: wether to pool (LVM and such) or do the multiple OSD's
[23:46] <EikiGQ> ajm: benefits/trade offs.
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