Monday, 2019-05-06

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openstackgerritzhufl proposed openstack/cinder master: [Trivial fix]Remove unnecessary slash  https://review.opendev.org/65721902:32
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openstackgerritzhufl proposed openstack/cinder master: [Trivial fix]Remove unnecessary slash  https://review.opendev.org/65721905:59
openstackgerritYury Kulazhenkov proposed openstack/cinder master: remove support for deprecated options in VxFlex OS driver  https://review.opendev.org/63835806:03
openstackgerritYury Kulazhenkov proposed openstack/cinder master: Add support for VxFlex OS 3.0 to VxFlex OS driver  https://review.opendev.org/63996306:03
openstackgerritYury Kulazhenkov proposed openstack/cinder master: rename ScaleIO driver to VxFlex OS  https://review.opendev.org/63439706:06
openstackgerritYury Kulazhenkov proposed openstack/cinder master: remove support for deprecated options in VxFlex OS driver  https://review.opendev.org/63835806:06
openstackgerritYury Kulazhenkov proposed openstack/cinder master: Add support for VxFlex OS 3.0 to VxFlex OS driver  https://review.opendev.org/63996306:06
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openstackgerritYachika_Ralhan proposed openstack/cinder master: Add new OSNEXUS Quantastor Cinder driver  https://review.opendev.org/61750306:43
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openstackgerrittonybrad proposed openstack/cinderlib master: Change deps source  https://review.opendev.org/65733908:14
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openstackgerritYachika_Ralhan proposed openstack/cinder master: Add new OSNEXUS Quantastor Cinder driver  https://review.opendev.org/61750308:56
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openstackgerritDingDong proposed openstack/cinder master: [Unity] Retype volume support  https://review.opendev.org/65627110:52
openstackgerritDingDong proposed openstack/cinder master: [Unity] Retype volume support  https://review.opendev.org/65627110:56
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openstackgerritDingDong proposed openstack/cinder master: [Unity] Retype volume support  https://review.opendev.org/65627111:04
openstackgerritDingDong proposed openstack/cinder master: [Unity] Retype volume support  https://review.opendev.org/65627111:05
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nikeshmhi11:35
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openstackgerritWalter A. Boring IV (hemna) proposed openstack/cinder master: Move NVMET driver exceptions to driver file  https://review.opendev.org/65695713:48
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openstackgerritWalter A. Boring IV (hemna) proposed openstack/cinder master: move NVMEOF exception to target file  https://review.opendev.org/65697613:56
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openstackgerritWalter A. Boring IV (hemna) proposed openstack/cinder master: move Hyperscale exceptions to driver  https://review.opendev.org/65699414:02
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openstackgerritJay Rubenstein proposed openstack/cinder master: SF: Handle qos values on extend volume  https://review.opendev.org/60695915:21
hemnasmcginnis: thanks for the comment15:26
hemnatrying to get all the right things in place15:26
smcginnishemna: No problem. Hoping we can avoid the extra work.15:26
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qqmberhi there..15:27
qqmberEverytime I send a lot of small files to a volume that is managed by cinder, I got this error: "blocked for more than 120 seconds" in the instance and the volume is remounted as read only.15:28
qqmberhere is a bug report back from 2014: https://bugs.launchpad.net/nova/+bug/137351315:28
openstackLaunchpad bug 1373513 in Cinder "Lvm hang during tempest tests" [Critical,Fix released] - Assigned to John Griffith (john-griffith)15:28
smcginnisqqmber: That would be an issue on the data path. Cinder doesn't do anything with that.15:29
qqmbersmcginnis: the data path... the network?15:29
smcginnisqqmber: Check your networking for issues.15:29
smcginnisYep15:29
qqmber:(15:29
smcginnisqqmber: Are you using LVM?15:29
qqmberyes, I'm15:29
qqmberlet's see15:30
smcginnisqqmber: OK, so could maybe be something on that host that is serving up LVM via iSCSI. Maybe something of interest in the logs there too.15:30
qqmberlet me see15:30
qqmbersmcginnis: at least in the host that serves as storage node that has the volume in question, there is no errors in its ethernet interface15:33
qqmberwhat log shuld I see? messages? which one?15:34
smcginnisqqmber: You could also check CPU load. If that host is too busy, that could cause some slow responses and potentially retries.15:34
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qqmbersmcginnis: the CPU load on the storage node reach 10. Being a host with 32 CPU, I don't think that would be a problem (AFAIK since is below 32 the load I'd be ok)15:39
qqmberthis is the only instance that has traffic. It is a new Openstack installation (Rocky)15:40
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jgriffithqqmber: What are you using for your backing files in your LVM deployment?15:46
jgriffithAre they *real* disks?15:47
jgriffithand could you clarify what you mean by "sending lots of small files to a volume"15:47
qqmberjgriffith: real = /dev/sdf from a Dell server with Centos 7 installed... ?15:48
jgriffithqqmber: ok, that's good, eliminates most of the topic in that bug15:48
openstackgerritRajini Karthik proposed openstack/cinder master: Dell EMC SC: Handle the mappings of multiattached volume  https://review.opendev.org/65683515:49
qqmberTotal: 120GB. Each file is 20KB15:49
jgriffithqqmber: in that case it leads back to what smcginnis mentioned regarding network drops.  Could be iscsi queue depth or just dropped packets15:49
jgriffithqqmber: are you just trying to do something like `cp ` a ton of files to your cinder-volume (mounted and formatted)?15:50
qqmberjgriffith: at least there are not errors on the network interface.. What else should I look at?15:50
qqmberjgriffith: rsync15:51
jgriffithqqmber: You'd have to look in syslog then I think15:52
jgriffithBut that's just going to tell you what you already know15:52
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qqmberjgriffith: the volume that "lives" on /dev/sdf from one physical host (called "iquique"), receives files from another place (Another server in the same rack, on the datacenter, passing thru one or two switches) thru the gateway host (Neutron, called "Arica"), and the volume is mounted on an intance that runs on another host (called "Antofagasta). Yes, it is mounted and formatted with ext4.15:53
jgriffithyou'll have to figure out how to tune iscsi on your system to deal with your tansfer.  I don't know if queue depth would help here or not15:53
jgriffithcould also be a caching issues15:54
jgriffithOhhh.. hmm, have you isolated it to the cinder volume by trying to rsync to the root fs on the nova instance?15:54
qqmberjgriffith: I'm not familiar with queue depth nor cache (in this scenario). Where can I read more about it?15:54
openstackgerritRajini Karthik proposed openstack/cinder master: Dell EMC SC: Handle the mappings of multiattached volume  https://review.opendev.org/65683515:54
jgriffithunless this is boot from volume then you're back in the same place :)15:54
qqmberjgriffith: It doesn't boot from the volume15:55
qqmberjgriffith: I can try to move some of this files to the root (100GB)15:55
qqmberthe error occurs after 65GB approx15:55
jgriffithThen if it were me I would first check if it's even an issue with Cinder volumes or not15:55
qqmberI'll do that... but what if that tests works fine? Where would you look at?15:56
jgriffithIf you want to read a little about queuedepth and burn the rest of your day you can start here: https://library.netapp.com/ecmdocs/ECMP1196793/html/GUID-A055B184-0876-4376-9C75-35FE8C9BE832.html15:57
jgriffith:))15:57
qqmberjgriffith: what do you mean with issues on the cinder volumes?15:57
jgriffithqqmber: your problem may not have anything to do with Cinder/iSCSI15:57
jgriffithit may be something on your networking or on the guest OS itself15:57
qqmberthe thing is that in my past deployment (Kilo) I had the same problem.. no erros like this until I did a DRP of a Elasticsearch node.. (same scenario, a lot of small files moving very fast)15:58
jgriffithqqmber: this might be a silly question (sorry if it is) but is the fs going readonly on the source or the destination?16:01
qqmberthen the problem occurs? yes16:01
qqmberit remount as readonly16:01
qqmberjgriffith: kernel: INFO: task jbd2/vdb1-8:6796 blocked for more than 120 seconds.16:02
qqmberthat's what I got in the instance16:02
qqmberwhen the problem occurs16:02
qqmberkernel: EXT4-fs (vdb1): Remounting filesystem read-only16:02
jgriffithSo you can also look at things like this:  https://www.linuxquestions.org/questions/linux-newbie-8/rsync-error-read-only-file-system-30-a-854252/16:02
jgriffithEven though that's a USB drive there are some tips on things to look for, and an example of somebody hitting issues on disk as well16:03
qqmberwhat I think, is there is too much traffic/hits/io/etc. for the net_interface/volume/switch/OS/etc. and the volumes crashes or something, and remunt as RO for safety.16:05
qqmberthe question is: Is the interface? is the switch? etc..16:05
qqmberI'll read everything. Thanks!16:05
qqmberjgriffith: just before remount I got this on the instance: 11:15:37 ada-1 kernel: blk_update_request: I/O error, dev vdb, sector 104471047216:07
qqmberthat's after the 120 sec timeout (6 minutes later..)16:08
qqmberor 8 minutes after the last "ok"16:08
jgriffithqqmber: I think you are on the right track (although it's a guess)16:11
qqmberI have good questions.. but no answers! hahaha16:11
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jgriffithqqmber: you and me both :)16:18
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qqmberjgriffith: do you think this could be related? https://bugzilla.redhat.com/show_bug.cgi?id=143998916:52
openstackbugzilla.redhat.com bug 1439989 in systemd "why so many sessions scope file didn't been deleted?" [Medium,New] - Assigned to dtardon16:52
qqmbersmcginnis: or you?16:53
qqmberbecause I'm having this issue on the storage host..  it is running docker (I installed openstack with kolla-ansible)16:53
qqmberIf I run "systemctl | grep 'of user'| grep 'abandoned'" I see a lot of abandoned sessions... and this in messages: "systemd: Failed to start Session c102725 of user root." every 30 seconds16:54
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hemnaqqmber: logs ?18:18
qqmberhemna: in /var/log/messages I see "systemd: Failed to start Session c102725 of user root." every 1 minute or so...18:19
qqmberactually is like 7 at once.. then, one minute later or so, seven more.. and so on18:19
hemnalooks like you have too many user sessions18:21
hemnamaybe cron jobs out of control?18:21
hemnathis is inside a running container ?18:22
qqmberhemna: it seems that is a Docker problem18:22
qqmberno, in the hsot, not the container18:22
qqmberhsot = host18:22
hemnaok, so the docker host then18:22
qqmberyep18:22
qqmberI have my guess... I'll try to change something (reinstall and check then)18:23
hemnaok18:23
qqmberbyt he way, I found this at the momento of the error:  kernel: connection9:0: detected conn error (1021)18:26
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KeithMnemonicI have two (stein & rocky) up when anyone has a chance to please help move them along  https://review.opendev.org/656802 & https://review.opendev.org/65691118:40
KeithMnemonicthese are 3par fixes18:40
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hemnaKeithMnemonic: I +1'd those, we need folks with stable releases +218:43
hemnaqqmber: ok that looks like a host kernel issue and/or a docker issue18:44
KeithMnemonichemna: thanks that is why i posted ;-)18:44
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openstackgerritWalter A. Boring IV (hemna) proposed openstack/cinder master: Remove unused exception  https://review.opendev.org/65743719:09
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openstackgerritWalter A. Boring IV (hemna) proposed openstack/cinder master: move synology driver exceptions  https://review.opendev.org/65744620:02
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