Discuss February 2015

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153 participants
159 discussions

Help with routing question.
by James B. Byrne 18 Feb '15

18 Feb '15

CentOS-6.6 We have a host that has multiple IPv4 addresses aliased to eth0. The primary address is 216.185.71.x and the alias is 192.168.6.x. This host connects to devices on both netblocks without problems. Only default routing is used and it looks like this: #ip route 192.168.6.0/24 dev eth0 proto kernel scope link src 192.168.6.x 216.185.71.0/24 dev eth0 proto kernel scope link src 216.185.71.x 169.254.0.0/16 dev eth0 scope link metric 1002 default via 192.168.6.1 dev eth0 src 192.168.6.x default via 216.185.71.1 dev eth0 When the system connects to internal systems via ssh it uses the src 216.185.71.x for devices on that netblock and 192.168.6.x for devices on the other. The problem is that when we try to establish an ssh connection off-site to another netblock altogether the host uses 192.168.6.x as the source and the destination gets the public side IP address of our gateway router as the point of origin due to masquerading. I have solved this by explicitly binding ssh to the public ipv4 when connecting using the --bind=216.185.71.x parameter. But I have two questions I would like to find answers for 1. Why is ssh using the private IP in preference to the public IP when connecting to off-site addresses? 2. How does one configure the routing table on network startup to specifically detail the route particular addresses are supposed to take? For diagnosis here are the ifcfg scripts used for both interfaces: DEVICE="eth0" BOOTPROTO="static" BROADCAST="216.185.71.255" DNS1="216.185.71.33" GATEWAY="216.185.71.1" HWADDR="38:60:77:D5:AC:D8" IPADDR="216.185.71.x" IPV6INIT="yes" IPV6_AUTOCONF="yes" NETMASK="255.255.255.0" NM_CONTROLLED="no" ONBOOT="yes" TYPE="Ethernet" UUID="0202e615-ce93-4fe1-833a-c11259afb850" DEVICE="eth0:192" BOOTPROTO="static" BROADCAST="192.168.6.255" GATEWAY="192.168.6.1" IPADDR="192.168.6.x" NETMASK="255.255.255.0" NM_CONTROLLED="no" ONPARENT="yes" TYPE="Ethernet" -- *** 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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debuginfo versioning tools?
by Les Mikesell 18 Feb '15

18 Feb '15

Are there any tools to help assemble libraries and debuginfo to examine core dumps that happened on another host where the versions don't match? Something like mock but build-version specific and with the debuginfo packages pulled in? -- Les Mikesell lesmikesell(a)gmail.com

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Re: [CentOS] debuginfo versioning tools?
by James B. Byrne 18 Feb '15

18 Feb '15

On Tue, February 17, 2015 15:20, Les Mikesell wrote: > Are there any tools to help assemble libraries and debuginfo to > examine core dumps that happened on another host where the versions > don't match? Something like mock but build-version specific and with > the debuginfo packages pulled in? > I am not sure that I understand your question so if this answer is totally irrelevant then please forgive me. But, in case this might help, you can configure mock to use locally provided repos and different architectures via the --configdir parameter. You provide an architecture specific config file like epel-6-x86_64.cfg in the specified directory and alter it to require packages to suit a specific build requirement. One of mine looks like this: config_opts['root'] = 'epel-6-x86_64' config_opts['target_arch'] = 'x86_64' config_opts['legal_host_arches'] = ('x86_64',) config_opts['chroot_setup_cmd'] = 'groupinstall buildsys-build' config_opts['dist'] = 'el6' # only useful for --resultdir variable subst config_opts['yum.conf'] = """ [main] cachedir=/var/cache/yum debuglevel=1 reposdir=/dev/null logfile=/var/log/yum.log retries=20 obsoletes=1 gpgcheck=0 assumeyes=1 syslog_ident=mock syslog_device= # repos [base] name=BaseOS enabled=1 mirrorlist=http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os failovermethod=priority exclude=http* [updates] name=updates enabled=1 mirrorlist=http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=updates failovermethod=priority exclude=http* [epel] name=epel mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=epel-6&arch=x86… failovermethod=priority exclude=http* [testing] name=epel-testing enabled=0 mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=testing-epel6&a… failovermethod=priority [local] name=local baseurl=file:///home/byrnejb/mock/repos/x86_64/ cost=0 enabled=1 [koji] name=koji baseurl=http://kojipkgs.fedoraproject.org/repos/dist-6E-epel-build/latest/x… cost=2000 enabled=0 [epel-debug] name=epel-debug mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=epel-debug-6&ar… failovermethod=priority enabled=0 """ and one calls it like this: mock --rebuild --root=epel-6-x86_64 --configdir=/home/byrnejb/mock /home/byrnejb/rpmbuild/SRPMS/httpd-2.4.9-1.el6.src.rpm -- *** 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] How to write RPM spec
by James B. Byrne 18 Feb '15

18 Feb '15

> On Wed, 18 Feb 2015 05:36:48 +1300 > Jegadeesh Kumar wrote: > >> I setup the RPM build server and read some doc to write the spec >> files. but i did get it clearly. So can you guys please help me >> to write a new RPM spec. If you have set up an RPM build server then you should have installed the rpmbuild and rpmdevtools packages. If you have installed the latter then you can use vi (vim/gvim) to automatically create an empty spec template file simply by opening any new file name ending in '.spec'. It will look like this: Name: Version: Release: 1%{?dist} Summary: Group: License: URL: Source0: BuildRoot: %(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX) BuildRequires: Requires: %description %prep %setup -q %build %configure make %{?_smp_mflags} %install rm -rf %{buildroot} make install DESTDIR=%{buildroot} %clean rm -rf %{buildroot} %files %defattr(-,root,root,-) %doc %changelog * Fri Apr 05 2013 James B. Byrne <byrnejb(a)harte-lyne.ca> - Rebuild for CentOS-6.4 - This description is an example and is not automatically - generated for you. Note that the formats for the date and identity in changelog entries are very specific and include the leading '*'. You cannot use any other format (to my knowledge) than that given above as an example. Each descriptive line thereafter must be prefaced by'- '. See: https://docs.fedoraproject.org/en-US/Fedora_Draft_Documentation/0.1/html/Pa… -- *** 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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Intermittent problem, likely disk IO related - mptscsih: ioc0: attempting task abort!
by Jason Pyeron 18 Feb '15

18 Feb '15

NOTE: this is happening on Centos 6 x86_64, 2.6.32-504.3.3.el6.x86_64 not Centos 5 Dell PowerEdge 2970, Seagate SATA drive, non-raid. I have this server which has been dying randomly, with no logs. I had a tail -f over ssh for a week, when this just happened. Feb 8 00:10:21 thirteen-230 kernel: mptscsih: ioc0: attempting task abort! (sc=ffff880057a0a080) Feb 8 00:10:21 thirteen-230 kernel: sd 4:0:0:0: [sda] CDB: Write(10): 2a 00 1a 17 a1 6f 00 00 01 00 Feb 8 00:10:51 thirteen-230 kernel: mptscsih: ioc0: WARNING - Issuing Reset from mptscsih_IssueTaskMgmt!! doorbell=0x24000000 Feb 8 00:10:51 thirteen-230 kernel: mptbase: ioc0: Initiating recovery Feb 8 00:11:13 thirteen-230 kernel: mptscsih: ioc0: task abort: SUCCESS (rv=2002) (sc=ffff880057a0a080) Write failed: Connection reset by peer After reading https://access.redhat.com/solutions/108273, I am increasing the logging (shown below) but I am not confident about this wait and see approach. sysctl -w dev.scsi.logging_level=98367 I am also going to check smartctl output once I get onsite to power cycle the system. Other posts I have read, but I can not act on yet: * http://unix.stackexchange.com/questions/34173/mptscsih-ioc0-task-abort-succ… * https://bugzilla.kernel.org/show_bug.cgi?id=18652 * https://bugzilla.redhat.com/show_bug.cgi?id=483424 * https://bugzilla.kernel.org/show_bug.cgi?id=42765 * http://sourceforge.net/p/smartmontools/mailman/message/23849184/ * http://kb.softescu.ro/category/hardware/dell/ -Jason -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - - - Jason Pyeron PD Inc. http://www.pdinc.us - - Principal Consultant 10 West 24th Street #100 - - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - - - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message is copyright PD Inc, subject to license 20080407P00.

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Using a *supported* web cam under CentOS 5
by Robert Heller 17 Feb '15

17 Feb '15

OK, I plugged in a web cam device (something called a 'Zoomy' -- a web cam/microscope). It is recognized by the unc driver. Now what? Does there exist a program that can use this device? Or do I have to write one from scratch? I have been searching the web, but all of the links are about getting and installing *drivers*. I don't need a driver, I need a userland program. With Ubuntu 14.04, there is a program named Cheese, but I can't find a version that works with CentOS 5. And no, don't tell me to install Ubuntu 14.04! -- Robert Heller -- 978-544-6933 Deepwoods Software -- Custom Software Services http://www.deepsoft.com/ -- Linux Administration Services heller(a)deepsoft.com -- Webhosting Services

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How to write RPM spec
by Jegadeesh Kumar 17 Feb '15

17 Feb '15

Hi team, I setup the RPM build server and read some doc to write the spec files. but i did get it clearly. So can you guys please help me to write a new RPM spec. or give me a scenario to write Thanks, Jegadeesh

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CentOS-announce Digest, Vol 120, Issue 5
by centos-announce-request＠centos.org 17 Feb '15

17 Feb '15

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CEBA-2015:0224 CentOS 6 system-config-printer FASTTRACK BugFix Update (Johnny Hughes) 2. CEBA-2015:0231 CentOS 6 bind-dyndb-ldap BugFix Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Mon, 16 Feb 2015 14:55:17 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CEBA-2015:0224 CentOS 6 system-config-printer FASTTRACK BugFix Update Message-ID: <20150216145517.GA2848(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2015:0224 Upstream details at : https://rhn.redhat.com/errata/RHBA-2015-0224.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 0b1e102e337bc6ca944887d5a86efce096e4f02b0d453259eb7def61aa100f10 system-config-printer-1.1.16-25.el6.i686.rpm d9e38068494f5baa375b4b4b2f0fafccbd5da2384e7302253540eb03880afbf7 system-config-printer-libs-1.1.16-25.el6.i686.rpm 3467770de97e623541c1e78d672f5bb60dc58b582fb7732e1375cd084203552b system-config-printer-udev-1.1.16-25.el6.i686.rpm x86_64: 4c707af2bc1752ceb64bea31b5b49421bc4510b0de09168984bdf619c83f86fc system-config-printer-1.1.16-25.el6.x86_64.rpm 9d6b1a5b04372fb7997490be1314d57865d37ee2f876403af979b8bb7c6ad021 system-config-printer-libs-1.1.16-25.el6.x86_64.rpm e10ae7473a8400abc3434a98ac765344915227f388a1f1fab953f088ab7e3af4 system-config-printer-udev-1.1.16-25.el6.x86_64.rpm Source: 30b20b371dfa2f021d329e5fa1d215595792417b07e6b18bb8d3fa77f75e2884 system-config-printer-1.1.16-25.el6.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Mon, 16 Feb 2015 18:18:53 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CEBA-2015:0231 CentOS 6 bind-dyndb-ldap BugFix Update Message-ID: <20150216181853.GA7919(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2015:0231 Upstream details at : https://rhn.redhat.com/errata/RHBA-2015-0231.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: ca86c5483876d2f979bff731622c5508248baecf4a61b13c77a522c153384587 bind-dyndb-ldap-2.3-6.el6_6.i686.rpm x86_64: fd444fbc66c4058cb422976051822ddbb6ba72d77e9307fe38e7ed52fc9dfddb bind-dyndb-ldap-2.3-6.el6_6.x86_64.rpm Source: 9d772df68036dd0915327569616b79ab429016b68b669ac532ae37cf3e86f826 bind-dyndb-ldap-2.3-6.el6_6.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 120, Issue 5 ***********************************************

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CentOS upgrade info
by Jegadeesh Kumar 17 Feb '15

17 Feb '15

Hello, I wan to know the details steps about how to do OS upgrade? Say for an example currently i am using CentOS 6.2 and plan to upgrade that to 7. Please detail me the steps. Thanks, Jegadeesh

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libvirt
by mattias 17 Feb '15

17 Feb '15

Seems libvirt are broken in centos7? I can start it but Virsh list for example: Connection refused Kvm are installed And the kvm driver installed

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Discuss February 2015