- Devel - oVirt List Archives

Contributing on ovirt
by shubham dubey 02 Mar '17

02 Mar '17

Hello, I am interested in being part of ovirt for gsoc 2017. I have looked into ovirt project ideas and the project that I find most suitable is Configuring the backup storage in ovirt. Since the ovirt online docs have sufficient info for getting started for development so I don't have a questions about that but I want to clarify one doubt that did the previous year mentioned project on ovirt gsoc page are also available to work on? I will also appreciate any discussion about the project or question from mentor side.Even some guideline for start working is welcome. Thanks, Shubham

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oVirt 4.1 deep dive - V4 Storage Type
by Maor Lipchuk 02 Mar '17

02 Mar '17

Hi all, Thank you all for participating the deep dive yesterday The slides are here: http://redhat.slides.com/mlipchuk/v4-storage-type#/ The recorded video is here: https://redhat.bluejeans.com/playback/guid/MTM5NjI5ODgyNToyNTY3MTYtMmMyNzI4… I will upload it later to youtube. Thanks, Maor Lipchuk

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cloud-init metadata service
by Marc Young 01 Mar '17

01 Mar '17

Ive looked through what documentation I can find and i only come up on bug reports from years ago, but: is there anyway to get metadata about a oVirt server metadata from the context of a VM ? cloud-init supports a metadata service that sits on 169.254.169.254 to retrieve info like instance-id etc. This is very useful in AWS which I'm familiar with. My context is that I'd like to run some assertions against a VM and the test framework I'm using runs all assertions from within the VM itself. So If i wanted to assert that the host running my VM is "x.foo.com" I'd have to be able to retrieve that from within the VM. I can do that via the REST API but that requires me to get a REST user/pass inside the vm and feels hacky. The common way of doing this at openstack/aws is to curl the metadata service which replies with information only relevant to the machine asking.

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dashboard jenkins jobs
by Sandro Bonazzola 01 Mar '17

01 Mar '17

Hi, just seen https://gerrit.ovirt.org/#/c/73182/ merged and no info on why all those jobs have been dropped. Can anybody update on this? As far as I can tell 4.y jobs are still needed. Or am I missing something? Thanks, -- Sandro Bonazzola Better technology. Faster innovation. Powered by community collaboration. See how it works at redhat.com

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Displaying external kvm VMs in Engine UI?
by Milan Zamazal 01 Mar '17

01 Mar '17

I was thinking why external VMs are not displayed in the VM list in Engine UI. Of course, in theory there shouldn't be any VMs running on the hosts out of oVirt control. But in reality they sometimes are and then it would be good to know about their existence -- I should be aware that something strange is present, either as a result of my or someone's else actions. Or vice versa, is there any reason to hide them? What do you think? Thanks, Milan

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proposing Filip Krepinsky as moVirt maintainer
by Tomas Jelinek 01 Mar '17

01 Mar '17

Hi All, it is my pleasure to propose Filip Krepinsky (suomiy) as the new maintainer of the moVirt project! Filip has joined the moVirt project 11th November 2015 by this commit: https://github.com/matobet/moVirt/commit/d37e71a436e38b6342903b991a30a8f358… and since than with his 140 commits became the contributor with second most patches (from 13 contributors in total). He have also contributed to the aSPICE project and was active in finding issues in the oVirt core (around dashboard). His patches are well crafted and I'm absolutely sure he will do great as a maintainer. have a nice day, Tomas

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System tests broken
by Nir Soffer 01 Mar '17

01 Mar '17

Trying to build, I get this error after few seconds: 01:23:08 [ovirt-system-tests_manual] $ /usr/bin/env python /tmp/hudson2923456913075803996.sh 01:23:08 Traceback (most recent call last): 01:23:08 File "/tmp/hudson2923456913075803996.sh", line 19, in <module> 01:23:08 suit_dir + '*.repo' 01:23:08 File "jenkins/scripts/mirror_client.py", line 79, in inject_yum_mirrors_file_by_pattern 01:23:08 for conf in glob.glob(repo_filename_glob): 01:23:08 NameError: global name 'repo_filename_glob' is not defined Nir

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[VDSM] granting network+2 to Eddy
by Dan Kenigsberg 28 Feb '17

28 Feb '17

Hi, After more than a year of substantial contribution to Vdsm networking, and after several months of me upgrading his score, I would like to nominate Eddy as a maintainer for network-related code in Vdsm, in master and stable branches. Current Vdsm maintainers and others: please approve my suggestion if you agree with it. Regards, Dan.

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[ OST Failure Report ] [ ovirt master ] [17.02.17 ] [ external deoendencies missed ]
by Pavel Zhukov 28 Feb '17

28 Feb '17

Hello, Many dependencies are missed [1] Suspected patch is one of the Sandro's fc24 deprecation patches most likely https://gerrit.ovirt.org/#/c/73142 link to first failed build: http://jenkins.ovirt.org/view/experimental%20jobs/job/test-repo_ovirt_exper… Changes: http://jenkins.ovirt.org/job/ovirt-engine_master_build-artifacts-el7-x86_64… Log: http://jenkins.ovirt.org/view/experimental%20jobs/job/test-repo_ovirt_exper… [1] [ ERROR ] Yum [u'ovirt-engine-4.2.0-0.0.master.20170227145042.giteb5e384.el7.centos.noarch requires collectd-postgresql', u'ovirt-engine-4.2.0-0.0.master.20170227145042.giteb5e384.el7.centos.noarch requires collectd-write_http', u'ovirt-engine-4.2.0-0.0.master.20170227145042.giteb5e384.el7.centos.noarch requires rubygem-fluent-plugin-secure-forward', u'ovirt-engine-4.2.0-0.0.master.20170227145042.giteb5e384.el7.centos.noarch requires collectd', u'ovirt-engine-4.2.0-0.0.master.20170227145042.giteb5e384.el7.centos.noarch requires collectd-disk', u'ovirt-engine-4.2.0-0.0.master.20170227145042.giteb5e384.el7.centos.noarch requires fluentd'] -- Pavel Zhukov Software Engineer RHV DevOps IRC: landgraf

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[monitoring][collectd] the collectd virt plugin is now on par with Vdsm needs
by Francesco Romani 27 Feb '17

27 Feb '17

Hello everyone, in the last weeks I've been submitting PRs to collectd upstream, to bring the virt plugin up to date with Vdsm and oVirt needs. Previously, the collectd virt plugin reported only a subset of metrics oVirt uses. In current collectd master, the collectd virt plugin provides all the data Vdsm (thus Engine) needs. This means that it is now possible for Vdsm or Engine to query collectd, not Vdsm/libvirt, and have the same data. There are only two caveats: 1. it is yet to be seen which version of collectd will ship all those enhancements 2. collectd *intentionally* report metrics as rates, not as absolute values as Vdsm does. This may be one issue in presence of restarts/data loss in the link between collectd and the metrics store. Please keep reading for more details: How to get the code? -------------------------------- This somehow tricky until we get one official release. If one is familiar with the RPM build process, it is easy to build one custom packages from a snapshot from collectd master (https://github.com/collectd/collectd) and a recent 5.7.1 RPM (like https://koji.fedoraproject.org/koji/buildinfo?buildID=835669) How to configure it? ------------------------------ Most thing work out of the box. One currently in progress Vdsm patch ships the recommended configuration https://gerrit.ovirt.org/#/c/71176/6/static/etc/collectd.d/virt.conf The meaning of the configuration option is documented in man 5 collectd.conf How it looks like? -------------------------- Let me post one "screenshot" :) $ collectdctl listval | grep a0 a0/virt/disk_octets-hdc a0/virt/disk_octets-vda a0/virt/disk_ops-hdc a0/virt/disk_ops-vda a0/virt/disk_time-hdc a0/virt/disk_time-vda a0/virt/if_dropped-vnet0 a0/virt/if_errors-vnet0 a0/virt/if_octets-vnet0 a0/virt/if_packets-vnet0 a0/virt/memory-actual_balloon a0/virt/memory-rss a0/virt/memory-total a0/virt/ps_cputime a0/virt/total_requests-flush-hdc a0/virt/total_requests-flush-vda a0/virt/total_time_in_ms-flush-hdc a0/virt/total_time_in_ms-flush-vda a0/virt/virt_cpu_total a0/virt/virt_vcpu-0 a0/virt/virt_vcpu-1 How to consume the data? ----------------------------------------- Among the ways to query collectd, the two most popular (and most fitting for oVirt use case) ways are perhaps the network protocol (https://collectd.org/wiki/index.php/Binary_protocol) and the plain text protocol (https://collectd.org/wiki/index.php/Plain_text_protocol) The first could be used by Engine to get the data directly, or to consolidate the metrics in one database (e.g to run any kind of query, for historical series...). The latter will be used by Vdsm to keep reporting the metrics (again https://gerrit.ovirt.org/#/c/71176/6) Please note that the performance of the plain text protocol are known to be lower than the binary protocol What about the unresponsive hosts? ------------------------------------------------------- We know from experience that hosts may become unresponsive, and this can disrupt monitoring. however, we do want to keep monitoring the responsive hosts, avoiding that one rogue hosts makes us lose all the monitoring data. To cope with this need, the virt plugin gained support for "partition tag". With this, we can group VMs together using one arbitrary tag. This is completely transparent to collectd, and also completely optional. oVirt can use this tag to group VMs per-storage-domain, or however it sees fit, trying to minimize the disruption should one host become unresponsive. Read the full docs here: https://github.com/collectd/collectd/commit/999efc28d8e2e96bc15f535254d412a… What about the collectd-ovirt plugin? -------------------------------------------------------- Some time ago I implemented one out-of-tree collectd plugin leveraging the libvirt bulk stats: https://github.com/fromanirh/collectd-ovirt This plugin is meant to be a modern, drop-in replacement for the existing virt plugin. The development of that out of tree plugin is now halted, because we have everything we need in the upstream collectd plugin. Future work ------------------ We believe we have reached feature parity, so we are looking for bugixes/performance tuning in the near term future. I'll be happy to provide more patches/PRs about that. Thanks and bests, -- Francesco Romani Red Hat Engineering Virtualization R & D IRC: fromani

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