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virt-install cannot mount virtio iso during installation
by Periko Support 11 Nov '17

11 Nov '17

Hi guys. I have seen, read and test to install a windows 7 vm under centos 6 and kvm. I have install windows under kvm a lot of times, but is my first time with virtio. I want to try virtio drives, I have install virtio from fedora repo, download the iso, etc. I have try different options trying to understand how kvm want the option to add my virtio iso drive as cdrom. virt-install --name virtio --description='Windows 7 Virtio x64' --memory 4096 --vcpus 2 --arch=x86_64 --cdrom /var/isos/win7_prox64.iso --os-variant win7 --disk /dev/vg_vms1/virtio,bus=virtio --disk /opt/virtio-win-0.1.141.iso,device=cdrom,bus=ide --network bridge=br0,model=e1000 --graphics vnc,listen=192.168.2.16,password=cocacaco --noautoconsole --check-cpu virt-install --name virtio --description='Windows 7 Virtio x64' --memory 4096 --vcpus 2 --arch=x86_64 --cdrom /var/isos/win7_prox64.iso --os-variant win7 --disk /dev/vg_vms1/virtio,bus=virtio --disk /opt/virtio-win-0.1.141.iso,device=cdrom --network bridge=br0,model=e1000 --graphics vnc,listen=192.168.2.16,password=cocacaco --noautoconsole --check-cpu virt-install --name virtio --description='Windows 7 Virtio x64' --memory 4096 --vcpus 2 --arch=x86_64 --cdrom /var/isos/win7_prox64.iso --os-variant win7 --disk /dev/vg_vms1/virtio,bus=virtio --disk path=/opt/virtio-win-0.1.141.iso,device=cdrom --network bridge=br0,model=e1000 --graphics vnc,listen=192.168.2.16,password=cocacaco --noautoconsole --check-cpu virt-install --name virtio --description='Windows 7 Virtio x64' --memory 4096 --vcpus 2 --arch=x86_64 --cdrom /var/isos/win7_prox64.iso --os-variant win7 --disk /dev/vg_vms1/virtio,bus=virtio --disk /opt/virtio-win-0.1.141.iso,device=cdrom,bus=ide --network bridge=br0,model=e1000 --graphics vnc,listen=192.168.2.16,password=cocacaco --noautoconsole --check-cpu etc etc. Once I remove my 2nd disk my installation goes well, but my object is to try virtio drives. Every time I try windows boot say : boot failed : could not read from CDROM(code 0004) Can some one point where is my error and fix my parameters, I will appreciated and ready to learn more, thanks for your time!!!

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XFS quota usage mismatch on CentOS 6 ?
by James Pearson 10 Nov '17

10 Nov '17

We have a number of home directory servers running CentOS 6 exporting XFS file systems over NFSv3 We enable user quotas for all users - with a relatively small allocation to each user Every now and then, we get a user that has a quota mismatch - where they are (usually) over their quota, but their actual usage (via du) is significantly less This happens on any of the servers I suspect that the mismatch is probably due to file space being allocated on the server, but somehow not referenced by a file - may be by deleted files?, but lsof on the client doesn't show any suitable deleted files The 'problem' usually resolves itself in a day or so - although I have no idea how or why etc ... Has anyone seen an issue like this - or know of any XFS tools that could be run on the server to find and fix the missing quota allocation? Thanks James Pearson

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Best laptop with NVIDIA graphics
by Jeff Layton 09 Nov '17

09 Nov '17

Good afternoon, I've been using CentOS for many, many years. I'm looking for a good laptop with 4 cores that has an NVIDIA GPU with dedicated memory. I'd prefer a GTX 10** series but the older 9** series is fine. Any recommendations? Thanks! Jeff

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Possibly [OT] ansible vmware inventory plugin
by Mark Haney 09 Nov '17

09 Nov '17

This might be OT, but it is CentOS related. I've been running Ansible on C7 for a handful of months now, and updated to 2.4 as soon as it was available. I've been building inventories by hand in that time (mostly due to the fact we had no actual documentation on the managed external customer servers). However, as we have a multiple VMware clusters, thought it might be time to tinker with dynamic inventories. The problem is that the vmware_inventory.py script didn't come with 2.4 in CentOS 7, even though it's in the stable branch. I'm curious, is this a deliberate omission on the CentOS maintainers part? I couldn't find a package that included it. Am I missing something obvious? -- Mark Haney Network Engineer at NeoNova 919-460-3330 option 1 mark.haney(a)neonova.net www.neonova.net

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Fwd: Persistent route
by Ritah Mulinde 09 Nov '17

09 Nov '17

Hello everyone Iam trying to delete a route from mt CentOs 7 server but everytime i restart network services, it reappears iam using command "route del -net x.x.x.x/x gw x.x.x.x <interface name>" Am i missing something?? Best Regards Mulin

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mariadb server memory usage
by hw 08 Nov '17

08 Nov '17

Hi, is this ok for a database server, or do I need to turn the memory allowance down? The machine has 48GB and mariadb is allowed about 40. The machine is a dedicated database server. Mysql seems to go up to what top says is virtually allocated under some circumstances; I don´t know what mariadb does. I don´t want anything get killed because memory runs out. Swap should prevent that anyway, but perhaps I went a bit higher than I should? Usual advice is to use 80%, and there are probably reasons for that. Perhaps it´s better to allow for more disk cache? KiB Mem : 49449424 total, 291772 free, 45891836 used, 3265816 buff/cache KiB Swap: 16777212 total, 16742928 free, 34284 used. 2985816 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 4138 mysql 20 0 48.908g 0.042t 14064 S 0.0 91.8 111:23.17 mysqld

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yum update info output
by Thomas Roth 08 Nov '17

08 Nov '17

Hi all, when I check for updates with yum, it gives me a list of packages, with some additional info, e.g. --> systemd-sysv-219-42.el7_4.1.x86_64 from @updates removed (updateinfo) --> systemd-sysv-219-42.el7_4.4.x86_64 from updates removed (updateinfo) yum info will tell me that I have 4.1 of this package installed, and that 4.4 is available - from the repo updates. What is the meaning of the "@" - it marks the older package? And why are all packages always "removed"? It would seem that both mentioned packages are still available... Regards, Thomas

2 2

Intermittently unresponsive mouse
by H 08 Nov '17

08 Nov '17

I am using the Mate desktop on CentOS 7 and have found that the mouse intermittently becomes unresponsive for a few seconds, typically no more than 3-5 seconds. I do not remember seeing that when I used the regular Gnome desktop on CentOS 6 but I could misremember. The machine is fast and uses a dual-monitor setup with the native nVidia graphics driver. Is this really to be expected? I thought this was not an issue on Linux or maybe I am engaging in wishful thinking...

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How to encourage maintainers to update their software
by H 07 Nov '17

07 Nov '17

How do I best encourage maintainers to update the software they are responsible for in various repositories? Akema Yagi made sure kmod-jfs for CentOS 7 was updated amazingly fast which is greatly appreciated. On the other hand, I have requested updates of some other software packages and have heard absolutely nothing in months...

9 19

lets talk abaut gstreamer 1.10.5, gstreamer-libav, ffmpeg, bluray and vlc
by Andreas Benzler 07 Nov '17

07 Nov '17

Hello guys, my playground this days with gstreamer resources can be found at: http://centos.cms4all.org/repo/7/gstreamer/ The best thing for centos I think to compile the given one by gstream libav: Has ffmpeg 3.2.5 not ffmpeg 2.8.13 what is the background for vlc. In principal it's possible to build ffmpeg 3.4. http://centos.cms4all.org/repo/7/gstreamer-ffmpeg3/ vlc 2.26 is only compatible with ffmpeg 2.8.xx release. Hopefully i get response from the gstreamer guys to get bluray running with gstream-libav. In the past it was possible with gstreamer 1.4.5. As a side node as always: Got problems with dvd on usb blurayplayer, but this is another storry and can not be fixed from the kernel side. Buffer problems. Blurays & DVD (builtin drive) are playing with vlc. Totem can play anything, exclude bluray. http://centos.cms4all.org/repo/7/media/ Another little problem is vlc 3.0 can only compiled with gcc 4.9 and upper. Has to be rearrange for static gcclib, no real dependency by installation. http://vault.centos.org/7.4.1708/sclo/Source/rh/devtoolset-3/ Not yet on my todo list. Why 4.9? No g++ binary break. Bluray taken from my libbluray1 rpm otherwise i brick gvfs (bluray 0.2.3). Recompiled test wise. Think about to write a mail to redhat. Yes I replace the complete gstreamer 1.10.4 with 1.10.5, because of minor update. The original package was gstreamer-libav-0.6. It was complete inpossible to play anything good in totem. What do you think ? Sincerely Andy PS: I'm tired. Please forget my bad english this days...

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