Discuss January 2015

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166 participants
147 discussions

Re: [CentOS] UC C-6, Gnome question
by Rushton Martin 12 Jan '15

12 Jan '15

>> On Sun, Jan 11, 2015 at 05:12:48PM -0500, Bill Maltby (C4B) wrote: >> > On Fri, 2015-01-09 at 19:42 -0500, Fred Smith wrote: >> > <snip> > >> > In a nutshell, after I would terminate Firefox as part of my normal >> > log off process, there would be another instance of Firefox left >> > hanging around with a ppid of 1 (so it's daemonized", or as I prefer >> > "demonized" ;-)) and using all the CPU it could get (97%-99% of a 6 >> > core AMD in my desktop) while no Firefox windows were open. Figuring >> > it might be saving stuff I checked back many minutes later on many >> > days and cycles and it was always there. Moreover, when normally >> > using Firefox I'd seen 103%, 104% CPU usage etc. >> >> I commonly also find a "stray" firefox running after stopping firefox, >> and it isn't using a window either. it's a nuisance because, when >> there's a firefox update and it wants to restart the browser, it can't >> because there's that darn "stray" one hanging around. Another Firefox "funny" to be aware of occurs if you have a $HOME shared between multiple machines. Firefox will refuse to start on the second machine whilst the first is running Firefox, it believes that there is already an instance running. Rebooting the second machine will not help. The quick-and-dirty way around this is to log in as a different user (and hence different $HOME) on the second machine. This email and any attachments to it may be confidential and are intended solely for the use of the individual to whom it is addressed. If you are not the intended recipient of this email, you must neither take any action based upon its contents, nor copy or show it to anyone. Please contact the sender if you believe you have received this email in error. QinetiQ may monitor email traffic data and also the content of email for the purposes of security. QinetiQ Limited (Registered in England & Wales: Company Number: 3796233) Registered office: Cody Technology Park, Ively Road, Farnborough, Hampshire, GU14 0LX http://www.qinetiq.com.

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Lvm snapshot problem
by Cristian Del Carlo 12 Jan '15

12 Jan '15

Hi list, i have an error when i do an lvm snapshot. The error is like this when i use the command "/sbin/lvcreate -L20G -s -n <snapshot> /dev/vgraid/vm" : *semid 5013504: semop failed for cookie 0xd4d23a8: incorrect semaphore state* * Failed to set a proper state for notification semaphore identified by cookie value 223159208 (0xd4d23a8) to initialize waiting for incoming notifications.* I use centos 7 with this packages: # rpm -aq | grep kernel kernel-3.10.0-123.9.3.el7.x86_64 # rpm -aq | grep lvm2 lvm2-libs-2.02.105-14.el7.x86_64 lvm2-2.02.105-14.el7.x86_64 I read that the problem is related to udev : # zgrep UEV /proc/config.gz CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug" # grep UEV /boot/config-3.10.0-123.9.3.el7.x86_64 CONFIG_UEVENT_HELPER_PATH="" CONFIG_DM_UEVENT=y I can not understand the problem. The server is in a server farm with a lot of VM running I would like to solve the problem without restarting the server. Could you help me? Thanks. -- -------------------------------------------------------- Cristian Del Carlo Il testo e gli eventuali documenti trasmessi contengono informazioni riservate al destinatario indicato. La seguente e-mail è confidenziale e la sua riservatezza è tutelata legalmente dal Decreto Legislativo 196 del 30/06/2003 (Codice di tutela della privacy). La lettura, copia o altro uso non autorizzato o qualsiasi altra azione derivante dalla conoscenza di queste informazioni sono rigorosamente vietate. Qualora abbiate ricevuto questo documento per errore siete cortesemente pregati di darne immediata comunicazione al mittente e di provvedere, immediatamente, alla sua distruzione. --------------------------------------------------------

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Thunderbird randomly segfaults at startup
by Robert Nichols 12 Jan '15

12 Jan '15

Anyone else seeing this? This is happening on a straight "Desktop" install of CentOS 6.6 fully updated. I have made no changes other than installing Thunderbird. Thunderbird will occasionally (10 to 20% of the time) fail to start, and the abrt report indicates a signal 11 (SIGSEGV). I don't see any other reports of this. Is no one using Thunderbird these days? Do abrt reports submitted from CentOS go anywhere useful these days? I saw some discussion a while back, but don't recall the results. Should I submit one? -- Bob Nichols "NOSPAM" is really part of my email address. Do NOT delete it.

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logrotate script not working
by Tim Dunphy 11 Jan '15

11 Jan '15

Hey guys, Got a quick question and I hope this is an easy one! In my /etc/logrotate.conf file I have the following entry: # rotate all of the apache logs -- we'll rotate them here /var/log/mysqld.log { weekly size 50M create 0644 mysql mysql rotate 1 } And from that I would expect the log to rotate when it reaches 50M in size. However I just caught that log weighing in at 356MB!! So how can I get this log file to rotate when it hits 50MB? Any ideas, advice and help at all would be appreciated. Thanks Tim -- GPG me!! gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B

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Intel NUC? Any experience
by david 11 Jan '15

11 Jan '15

Folks The price point of Intel's NUC unit makes it attractive to use as a server that doesn't have significant computational load. In my environment, a USB connected hard-drive could provide all the storage needed. I wonder if anyone has had experience with it, and can answer: 1) Does Centos6 and/or Centos7 install from a USB connected optical drive? or a USB flash drive? I'd prefer to do a NetInstall. If the answer is essentially no, there's no point in continuing. 2) Is the Ethernet connection supported by NetInstall and the subsequent OS? 3) Is it possible to add an additional NIC for possible use as a home router/gateway? If not internally, then via a USB connected NIC? Any thoughts on the subject would be appreciated. David San Francisco

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LVM - pvmove and multiple servers
by Daniel Hoffman 10 Jan '15

10 Jan '15

Hi All. Looking for some guidance/experience with LVM and pvmove. I have a LUN/PV being presented from a iscsi SAN. The LUN/PV is presented to 5 servers as a shared VG they all have LV's they use for data, they are all connected via iSCSI. As the SAN I am using is being replaced I need to move onto a new unit. My migration strategy at this time is to 1. Present a new LUN from the new SAN to all machines. 2. Make a PV with the new LUN. 3. Add it to the existing VG. 4. Use pvmove to move all the data from one PV to another. 5. Once the old LUN is empty, complete a pvresize to remove the old LUN. This all seems sound but looking for advice, specifically around the fact that the VG/PV data is being used by a number of machines/servers and the LV's are active on a number of different nodes. All the documentation/examples I can find assume a disk in a server, not a LUN on a SAN being shared by a number of servers. Any advice is appreciated. Thanks Daniel

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Re: [CentOS] Design changes are done in Fedora
by James B. Byrne 10 Jan '15

10 Jan '15

On Mon, December 29, 2014 04:22, Ned Slider wrote: > What business model do you have that you > can't build around a product guaranteed to be consistent/supported for > the next 10 years? Well, despite the hype from Wall St., Bay St. and The City, a large number of organisations in the world run on software that is decades old and cannot be economically replaced. In many instances in government and business seven years is a typical time-frame in which to get a major software system built and installed. And I have witnessed longer. So, seven, even ten, years of stability is really nothing at all. And as Linux seeks to enter into more and more profoundly valuable employment the type of changes that we witnessed from v6 to v7 are simply not going to be tolerated. In fact, it my considered belief that RH in Version EL7 has done themselves a serious injury with respect to corporate adoption for core systems. Perhaps they seek a different market? Think about it. What enterprise can afford to rewrite all of its software every ten years? What enterprise can afford to retrain all of its personnel to use different tools to accomplish the exact same tasks every seven years? The desktop software churn that the PC has inured in people simply does not scale to the enterprise. If you wish to see what change for change's sake produces in terms of market share consider what Mozilla has done with Firefox. There is absolutely no interface that is as easy to use as the one you have been working on for the past ten years. And that salient fact seems to be completely ignored by many people in the FOSS community. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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Re: [CentOS] Design changes are done in Fedora
by James B. Byrne 09 Jan '15

09 Jan '15

On Wed, January 7, 2015 09:48, Jonathan Billings wrote: > On Tue, Jan 06, 2015 at 08:45:29PM -0600, John R. Dennison wrote: >> It's not relevant in _any_ sense. CentOS is nothing more than (at >> it's core) a rebuild of RHEL. This type of nonsense should be >> directed to Red Hat in a Red Hat venue. It's nothing but >> off-topic noise here as CentOS will not deviate from its >> upstream in its core offerings. > > Agreed. > > If you want to participate in how the upstream OS is being shaped, I > suggest looking at the Fedora Project, which is driven by volunteers. > > If you notice the Subject: of this thread, it is "Design changes are > done in Fedora". Pretty clear message. > There is a common word disguised in the letter E that we find in both the initialism RHEL and the acronym CentOS. It is the the word Enterprise. It is my observation that the subscriber base to this list tends to those who have wider responsibilities than deciding what the corporate GUI desktop layout should look like next year. Most here also seem to be somewhat concerned with concepts of cost and benefit. It is evident in many posts that the increasing costs of supporting large numbers of people negatively impacted by changes introduced to CentOS from outside of their span of control is beginning to impinge more and more upon decision making. In some cases that consideration is evidently influencing the decision to deploy CentOS or not. Now, what does the subscriber base to Fedora developers list look like? Well, to begin with there are no fewer than 209 official 'Fedora' lists. Which should one join to 'influence' anything? Let us grant that a number, say half, are self-evidently not of great concern to operational deployment and employment of RHEL, CentOS or SL in the Enterprise environment. The oddly named 'UK-Ambassadors' or the narrowly focused language translation mailing lists for instance. That still leaves in excess of a hundred lists. Where should one apply pressure? What forum exists to discuss the economic costs to Enterprises of introducing a marginal, possibly questionable, improvement to an existing UI or common utility? The devel list? The users list? A perusal of the contents of both the Fedora devel list and users list does not give one much hope that such a point of view would be tolerated, much less welcomed. For example, one the the notable contributors to those forums is himself banned from this list. Further, discussions tend to be far, far down in the weeds, if not subterranean altogether, when viewed from the perspective of the question: what is this change, improvement, alteration or deprecation going to cost the installed base to implement? No, no-one presently on this list is likely to have very much of an impact on the folks that are the Fedora project. Their objectives are far removed from the concerns of those tasked to keep automated systems working and invisible to the Enterprises that employ them. The overarching concern of the Enterprise is to employ capital and labour to produce value; and not simply to prove technologies or advance personal or political agendas. Not that the later two situations are uncommon in the Enterprise either. One might, however, consider that the CentOS list is a concentration of people that evidently have some status within a number of Enterprises. And these influential people have chosen not to pay RH for their offering. It might be of some interest to RH in determining why this is so. It might also be the case that this forum, being concerned with issues such as deployment on a large scale and the costs of upgrading RH flagship product, provides valuable insight on how RH's paying customers might be viewing their product as well. After all, because we use CentOS rather than RHEL and forgo the provision of RH's expert advice, then we ourselves and our organisations are a self-identified technologically advanced user community. And we are concerned more with the entire package than with any particular component or detail. If we have concerns and reservations then perhaps RH should have concerns. If we express them here then there is a chance, a small chance but a chance nonetheless, that someone at RH with a view a little broader than that evidenced in most of the traffic on the Fedora devel list, might take notice. IMHO, FWIW. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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Re: [CentOS] Camera doesn't works after "yum upgrade"
by Patrick Begou 09 Jan '15

09 Jan '15

Thanks Marc for your answer, I have a /dev/video0 but no /dev/video. Should I create a link ? Or a new rule in udev ? Patrick m.roth(a)5-cent.us wrote: > Patrick Begou wrote: >> Hi, >> >> I've launched a "yum upgrade" command on a CentOS6 laptop which has >> updated nearly 600 packages. Automatic updates were not working because > of a >> conflict on a package. >> >> So the laptop is now uptodate but the camera did not works after this. The >> message is: >> >> kernel: uvcvideo: Failed to query (GET_DEF) UVC control 6 on unit 2: -110 >> (exp. 2). >> >> The camera is detected as USB, lsusb shows: >> Bus 001 Device 003: ID 0c45:646b Microdia > <snip> > We use motion, so I' m not familiar with camera, but does it load an v4l2 > kernel module, and so create /dev/video0? If so, does the /dev/video > device exist? > > mark > -- =================================================================== | Equipe M.O.S.T. | | | Patrick BEGOU | mailto:Patrick.Begou@grenoble-inp.fr | | LEGI | | | BP 53 X | Tel 04 76 82 51 35 | | 38041 GRENOBLE CEDEX | Fax 04 76 82 52 71 | ===================================================================

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Camera doesn't works after "yum upgrade"
by Patrick Begou 09 Jan '15

09 Jan '15

Hi, I've launched a "yum upgrade" command on a CentOS6 laptop which has updated nearly 600 packages. Automatic updates were not working because of a conflict on a package. So the laptop is now uptodate but the camera did not works after this. The message is: kernel: uvcvideo: Failed to query (GET_DEF) UVC control 6 on unit 2: -110 (exp. 2). The camera is detected as USB, lsusb shows: Bus 001 Device 003: ID 0c45:646b Microdia I've tryed to boot on alternative kernels but no change: - vmlinuz-2.6.32-504.3.3.el6.centos.plus.x86_64 (which solve a camera problem on my laptop) - vmlinuz-2.6.32-431.29.2.el6.x86_64 - vmlinuz-3.10.63-1.el6.elrepo.x86_64 Any idea about a faulty package ? I've added the upgrade log in attachment but it's quite big. The first four erased item were because of conflicts. Some are re-installed after the upgrade (end of the log file) Thanks Patrick -- =================================================================== | Equipe M.O.S.T. | | | Patrick BEGOU | mailto:Patrick.Begou@grenoble-inp.fr | | LEGI | | | BP 53 X | Tel 04 76 82 51 35 | | 38041 GRENOBLE CEDEX | Fax 04 76 82 52 71 | ===================================================================

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Discuss January 2015