Discuss December 2015

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131 participants
134 discussions

Centos 7, grub2-mkconfig, unsupported sector
by m.roth＠5-cent.us 02 Jan '16

02 Jan '16

Hi, folks, Well, I get back from vacation, and three CentOS 7 boxes didn't come up this morning (my manager and the other admin did the update & reboot). On these three - but *not* another one or two, and I don't think those others are Dells, they're supermicro's - the 327 kernel fell into the rdosshell, I guess. I finally got one the three up by going back to the 228.14 kernel. Now, after googling and finding the CentOS bugzilla, 0009860, that referenced the upstream bugzilla, I applied the workaround discussed in it, Adding initcall_blacklist=clocksource_done_booting to GRUB_CMDLINE_LINUX in /etc/default/grub and then grub2-mkconfig -o /etc/grub2.cfg" On one. On the other, that's got a *large* RAID appliance (a JetStor w/ 42 4TB drives...), it seemed to work... then gave me a dozen or so ERROR: unsupported sector size 4096 on /dev/sdd. ERROR: unsupported sector size 4096 on /dev/sde. 0. Did the grub2-mkconfig actually work correctly? 1. Is it safe to ignore the errors and reboot? 2. This seems to be an old bug in os-prober, that was fixed years ago - has it slipped back in? mark

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NFS problem after 7.2
by Mark2015 01 Jan '16

01 Jan '16

I just updated my fileserver to version 7.2 and got some NFS problems after that. In /etc/exports I have the following line /path hostname(ro,insecure) Now that host can no longer mount that share. I get mount.nfs: access denied by server while mounting x Also when I do restart of the NFS server I get following in the logs Dec 30 21:59:33 files systemd[1]: Starting NFS server and services... Dec 30 21:59:33 files nfsdcltrack[31076]: sqlite_query_reclaiming: unable to prepare select statement: no such column: has_session Dec 30 21:59:33 files polkitd[28879]: Unregistered Authentication Agent for unix-process:31032:12640806 (system bus name :1.635, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_GB.UTF-8) (disconnected from bus) Dec 30 21:59:34 files nfsdcltrack[31412]: sqlite_insert_client: insert statement prepare failed: table clients has 2 columns but 3 values were supplied What to do?

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CentOS 7, annoyances in the logs
by m.roth＠5-cent.us 31 Dec '15

31 Dec '15

Annoyances: 1. I'm seeing a lot of noise in the logfile for a workstation that I just built a couple months ago. One complaint is that Configuration file /usr/lib/systemd/system/ebtables.service is marked executable. Please remove executable permission bits. Proceeding anyway. *Should* anything named <servicename>.service have any permissions other than readable (and write for root)? 2. A lot of python: SELinux is preventing /usr/sbin/NetworkManager from write access on the directory /sys.#012#012***** Plugin catchall (100. confidence) suggests **************************#012#012If you believe that NetworkManager should be allowed write access on the sys directory by default.#012Then you should report this as a bug.#012You can generate a local policy module to allow this access.#012Do#012allow this access for now by executing:#012# grep NetworkManager /var/log/audit/audit.log | audit2allow -M mypol#012# semodule -i mypol.pp#012 Which policy I implemented, but why is that incorrect in the first place? 3. Finally, the noisiest of all, NetworkManager[7723]: <warn> error requesting auth for org.freedesktop.NetworkManager.settings.modify.hostname: (0) Authorization check failed: GDBus.Error:org.freedesktop.DBus.Error.NoReply: Message did not receive a reply (timeout by message bus) and for what seems like every possible network type NetworkMangler handles, including wifi, and I yum removed NetwoworkManager-wifi.... Anyone have any answers so I can shut this up? mark

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Re: [CentOS] routing with 2 public ips
by Gordon Messmer 31 Dec '15

31 Dec '15

On 12/28/2015 01:19 AM, Александр Кириллов wrote: > Are you sure? You assume the destination of the incoming traffic is > the gateway. What if it isn't? Can you explain what you mean? Not only am I not assuming that, I can hardly conceive of any situation in which a host will receive traffic for its own gateway.

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Centos7 and clamd
by Robert Moskowitz 31 Dec '15

31 Dec '15

On my Centos6 mailserver (really Redsleeve6), I installed clamav and clamd (and lots more). I am working up to moving to Centos7 (really Centos7-arm), and no clamd. clamav is there. So is the clamd functions moved into clamav now or what do I do to get whatever clamd did for me? :) thanks

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Systemd and systemd-sysv-generator
by Mike - st257 30 Dec '15

30 Dec '15

Hello CentOS List, I have a server that has SysV script supplied by a hardware manufacturer, which is not functioning properly. From my reading, systemd-sysv-generator should handle them (like it did for Dell OpenManage software which supplied SysV init scripts). /usr/lib/systemd/system-generators/systemd-sysv-generator Takes no or 3 arguments (it tells me), but I didn't find clear documentation on this binary. And no arguments doesn't seem to fix the issue. The particular software in question is LSI MegaRaid SNMP daemon. I retrieved the latest version from LSI's site which was provided for EL7. ~]# systemctl lsi_mrdsnmpd.service start Unknown operation 'lsi_mrdsnmpd.service'. ~]# service lsi_mrdsnmpd start Reloading systemd: [ OK ] Starting lsi_mrdsnmpd (via systemctl): Failed to start lsi_mrdsnmpd.service: Unit lsi_mrdsnmpd.service failed to load: No such file or directory. [FAILED] ~]# /etc/init.d/lsi_mrdsnmpd start Reloading systemd: [ OK ] Starting lsi_mrdsnmpd (via systemctl): Failed to start lsi_mrdsnmpd.service: Unit lsi_mrdsnmpd.service failed to load: No such file or directory. [FAILED] ~]# /etc/init.d/lsi_mrdsnmpd status lsi_mrdsnmpagent is stopped ~]# ls -1 /etc/init.d/ dataeng dsm_om_connsvc dsm_om_shrsvc dsm_sa_ipmi functions instsvcdrv lsi_mrdsnmpd netconsole network racsvc racsvc.sh README # in /etc/init.d/README "Note that traditional init scripts continue to function on a systemd system. An init script /etc/rc.d/init.d/foobar is implicitly mapped into a service unit foobar.service during system initialization." ~]# ls -1 /etc/rc.d/init.d/ dataeng dsm_om_connsvc dsm_om_shrsvc dsm_sa_ipmi functions instsvcdrv lsi_mrdsnmpd netconsole network racsvc racsvc.sh README Thoughts as to why systemd didn't "implicitly" handle this SysV script (and have it work)? Suggestions as to where I go from here to properly solve this problem? Thanks! -- ---~~.~~--- Mike // SilverTip257 //

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Re: [CentOS] hostname service?
by Nicholas Geovanis 30 Dec '15

30 Dec '15

>The service you are referring to is hostnamed [1]. hostnamed is >designed to start on request and terminate after an idle period. >Programs on your computer are probably querying the service to >determine if your hostname has changed. I see that I couldn't previously find it with systemctl because it is a "static" service, neither enabled nor disabled. What is "static" really intended to mean here? The other static services seem to be boot-time related for the most part, eg anaconda, pvscan.... Man for hostnamectl (also new to me) indicates some potential uses for the hostnamed-maintained names, yet I see nothing obvious making use of that info. Can you give me an example? Thanks for the clues.....Nick Geovanis >Date: Sun, 27 Dec 2015 18:14:55 -0700 >From: Brandon Vincent <Brandon.Vincent(a)asu.edu> >To: CentOS mailing list <centos(a)centos.org> >Subject: Re: [CentOS] hostname service? >Message-ID: <CAJm423-e2+EnrDyaSvt4RKUXPsAZNbW8V9muexNAm7F150EZXQ(a)mail.gmail.com> >Content-Type: text/plain; charset=UTF-8 >On Sun, Dec 27, 2015 at 4:03 PM, Nicholas Geovanis ><nickgeovanis(a)gmail.com> wrote: >> On CentOS 7, I find in /var/log/messages several times daily messages >> "localhost systemd: Started Hostname Service.". However I can't seem t>o >> find such a service using the systemctl command. What is the >"Hostname >> Service", what does it do and why is it being restarted frequently? Many >> thanks....Nick >Hi Nick, >The service you are referring to is hostnamed [1]. hostnamed is >designed to start on request and terminate after an idle period. >Programs on your computer are probably querying the service to >determine if your hostname has changed. >This is normal behavior. >Brandon Vincent

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Re-booting into CentOS-7.2 - advice sought
by Timothy Murphy 30 Dec '15

30 Dec '15

I have a remote home server updated to CentOS-7.2.1511 (as stated in /etc/redhat-release) but I have not re-booted since the update. The machine is currently running kernel 3.10.0-229.11.1.el7.x86_64. I'm wondering if anyone has advice on any safety steps I can take before re-booting, so that in the event of failure I can give simple instructions to my daughter at the other end on how to get the system running? Any suggestions gratefully received. -- Timothy Murphy gayleard /at/ eircom.net School of Mathematics, Trinity College, Dublin

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weird usb/sound problem on C7
by Fred Smith 30 Dec '15

30 Dec '15

I'm running C7, fully up to date. I'm also running the MATE desktop (from epel) though the original installation was Gnome. a couple weeks ago my USB headset worked as both earphones and mic. today when I plug it in I get nothing. right-clicking on the speaker icon in the upper panel I can choose "sound preferences" (as an aside, how can I figure out what program that actually is? it has no help or about option) and in the "Hardware" tab it shows several devices. One of them is the 'Plantronics C320' and it is listed as "Disabled". As far as I know I've done nothing to make it disabled, can anyone advise me how to UN-disable it? I can't figure it out... since this isn't windoze, I'm not in the habit of rebooting every time something weird happens, but I'm wondering if that's the practical solution for this, or not. thanks for any advice Fred PS: Oh, regarding what program it is, what appears to be the same program also exists in the menus from the top panel under System/Preferences/ Hardware/Sound. It still doesn't identify itself, but if I right-click on it and choose add launcher to desktp, I can then right-click on it, choose Properties, and see it is "mate-volume-control". I'll do some searching on that name for advice, and if I turn up anything I'll post it here. -- ------------------------------------------------------------------------------- Under no circumstances will I ever purchase anything offered to me as the result of an unsolicited e-mail message. Nor will I forward chain letters, petitions, mass mailings, or virus warnings to large numbers of others. This is my contribution to the survival of the online community. --Roger Ebert, December, 1996 ----------------------------- The Boulder Pledge -----------------------------

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moving LDAP from one domain to another
by Dan Hyatt 29 Dec '15

29 Dec '15

Hello, I am moving LDAP from one domain to another We have moved off of a.wustl.edu network to b.school.edu network. I have searched vi /etc/nslcd.conf vi /etc/openldap/ldap.conf and removed all referances to "a" I restarted /etc/init.d/nscd restart this is redhat 6.7, and my ldap server is now ldap.b.wustl.edu:389 a.school.edu to b.school.edu I keep getting messages that Dec 29 14:50:19 linuscs133 nslcd[7438]: [709c39] ldap_start_tls_s() failed: Can't contact LDAP server (uri="ldap://ldap.a.wustl.edu/") Dec 29 14:50:19 linuscs133 nslcd[7438]: [709c39] failed to bind to LDAP server ldap://ldap.a.wustl.edu/: Can't contact LDAP server Dec 29 14:50:19 linuscs133 nslcd[7438]: [709c39] no available LDAP server found Dec 29 14:50:28 linuscs133 rpc.mountd[12501]: authenticated mount request from IP:833 for /vol/aggr1/filefs (/vol/aggr1) Dec 29 14:50:41 linuscs133 rpc.mountd[12501]: authenticated mount request from ... for /vol/aggr1/dsg_external_collab (/vol/aggr1) Dec 29 14:55:19 linuscs133 nslcd[7438]: [f48f70] ldap_start_tls_s() failed: Can't contact LDAP server (uri="ldap://ldap.a.wustl.edu/") Dec 29 14:55:19 linuscs133 nslcd[7438]: [f48f70] failed to bind to LDAP server ldap://ldap.a.school.edu/: Can't contact LDAP server Dec 29 14:55:19 linuscs133 nslcd[7438]: [f48f70] no available LDAP server found Where else is the a.wustl.edu domain set? Thanks in advance Dan

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Discuss December 2015