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nfs4 and idmapd
by Peter Wood 16 Apr '13

16 Apr '13

I'm using CentOS5.9 and mounting a remote directory via NFSv4. The nfs server is OpenIndiana 151.a.7 (i.e. Solaris). Users bin and daemon have each others ID on the oposite system. On OpenIndiana: User: bin; ID=2 User: daemon; ID=1 On CentOS: User: bin; ID=1 User: daemon; ID=2 That means if I create a file as daemon on the client (CentOS), it gets saved on the server as owner bin and it shows back on the client as owner bin. I'm trying to use idmapd to define custom mapping but I can't get it working. ======= cat /etc/idmapd.conf [General] Verbosity = 5 Domain = local [Mapping] Nobody-User = nobody Nobody-Group = nobody [Translation] Method = static,nsswitch [Static] bin@local = daemon ======= service rpcidmapd restart In /var/log/messages: Apr 16 11:26:37 tzalt rpc.idmapd[29848]: libnfsidmap: using domain: local Apr 16 11:26:37 tzalt rpc.idmapd[29848]: libnfsidmap: processing 'Method' list Apr 16 11:26:37 tzalt rpc.idmapd[29848]: libnfsidmap: loaded plugin libnfsidmap_static.so for method static Apr 16 11:26:37 tzalt rpc.idmapd[29848]: libnfsidmap: loaded plugin libnfsidmap_nsswitch.so for method nsswitch Apr 16 11:26:37 tzalt rpc.idmapd[29849]: Expiration time is 600 seconds. Apr 16 11:26:37 tzalt rpc.idmapd[29849]: nfsdopenone: Opening /proc/net/rpc/nfs4.nametoid/channel failed: errno 2 (No such file or directory) I researched the error above and in a few places people say that it should be ignored. ====== mount -t nfs4 srvstor15:/utils/depdata /utils/depdata In /var/log/messages: Apr 16 11:28:42 tzalt rpc.idmapd[29849]: New client: 4b Apr 16 11:28:42 tzalt rpc.idmapd[29849]: Opened /var/lib/nfs/rpc_pipefs//nfs/clnt4b/idmap Apr 16 11:28:42 tzalt rpc.idmapd[29849]: New client: 4c Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_uid: calling nsswitch->name_to_uid Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nss_getpwnam: name 'root@local' domain 'local': resulting localname 'root' Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_uid: nsswitch->name_to_uid returned 0 Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_uid: final return value is 0 Apr 16 11:28:42 tzalt rpc.idmapd[29849]: Client 4b: (user) name "root@local" -> id "0" Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_gid: calling nsswitch->name_to_gid Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_gid: nsswitch->name_to_gid returned -2 Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_gid: final return value is -2 Apr 16 11:28:42 tzalt rpc.idmapd[29849]: Client 4b: (group) name "staff@local" -> id "99" Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_gid: calling nsswitch->name_to_gid Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_gid: nsswitch->name_to_gid returned 0 Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_gid: final return value is 0 Apr 16 11:28:42 tzalt rpc.idmapd[29849]: Client 4b: (group) name "root@local" -> id "0" Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_uid: calling nsswitch->name_to_uid Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nss_getpwnam: name 'daemon@local' domain 'local': resulting localname 'daemon' Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_uid: nsswitch->name_to_uid returned 0 Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_uid: final return value is 0 Apr 16 11:28:42 tzalt rpc.idmapd[29849]: Client 4b: (user) name "daemon@local" -> id "2" Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_gid: calling nsswitch->name_to_gid Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_gid: nsswitch->name_to_gid returned 0 Apr 16 11:28:42 tzalt rpc.idmapd[29849]: nfs4_name_to_gid: final return value is 0 Apr 16 11:28:42 tzalt rpc.idmapd[29849]: Client 4b: (group) name "daemon@local" -> id "2" ====== sudo -u daemon touch /utils/depdata/bin/asdfDaemonF1 In /var/log/messages: Apr 16 11:31:56 tzalt rpc.idmapd[29849]: nfs4_name_to_uid: calling nsswitch->name_to_uid Apr 16 11:31:56 tzalt rpc.idmapd[29849]: nss_getpwnam: name 'bin@local' domain 'local': resulting localname 'bin' Apr 16 11:31:56 tzalt rpc.idmapd[29849]: nfs4_name_to_uid: nsswitch->name_to_uid returned 0 Apr 16 11:31:56 tzalt rpc.idmapd[29849]: nfs4_name_to_uid: final return value is 0 Apr 16 11:31:56 tzalt rpc.idmapd[29849]: Client 4b: (user) name "bin@local" -> id "1" Apr 16 11:31:56 tzalt rpc.idmapd[29849]: nfs4_name_to_gid: calling nsswitch->name_to_gid Apr 16 11:31:56 tzalt rpc.idmapd[29849]: nfs4_name_to_gid: nsswitch->name_to_gid returned 0 Apr 16 11:31:56 tzalt rpc.idmapd[29849]: nfs4_name_to_gid: final return value is 0 Apr 16 11:31:56 tzalt rpc.idmapd[29849]: Client 4b: (group) name "bin@local" -> id "1" ====== ls -l /utils/depdata/bin/asdfDaemonF1 -rw-r--r-- 1 bin bin 0 Apr 16 11:31 /utils/depdata/bin/asdfDaemonF1 The file is owned by user bin on the client and the server. But, I used user daemon to create it. Any suggestion how can I get this ownership in sync? Thanks, -- Peter

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qmake package
by Kaplan, Andrew H. 16 Apr '13

16 Apr '13

Hello -- I am running the release 6.2 32-bit distribution, and I am in need of the qmake utility in order to complete the installation of an application. Can someone provide the name of the package, or packages, that would include the qmake software? Thanks. The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.

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My linux keeps logging me off when I run Firefox (how to debug)?
by Rock 16 Apr '13

16 Apr '13

This is a strange one to me. Just recently, my Centos 6 has been "gentle crashing" where it doesn't crash, per se, but the screen goes black, and the login prompt pops up. It only happens when I run Firefox and it only started happening this morning. However, it has happened a dozen times, and always when Firefox is running. It does NOT happen when Firefox is not running. I haven't tested with Chrome yet; so that's my next test - but - the question I have is: How do I log the events that are causing Centos to log me out of user1 and to present the login screen?

6 12

New motherboard - kernel panic
by Bowie Bailey 16 Apr '13

16 Apr '13

I had to replace the motherboard on one of my CentOS 4 systems and am now getting a kernel panic. When I try to boot up, I get this: Volume group "VolGroup00" not found ERROR: /bin/lvm exited abnormally! (pid 448) mount: error 6 mounting ext3 mount: error 2 mounting none switchroot: mount failed: 22 umount /initrd/dev failed: 2 Kernel panic - not syncing: Attempted to kill init! (I apologize for any typos, I don't have a way to copy/paste from that screen) I can boot up with the boot CD, go into rescue mode and browse the files, so I know the drives are ok. I found some stuff online saying that I should recreate my initrd from rescue mode if the motherboard changed. I tried this, but am still getting the same results. Suggestions? Thanks, -- Bowie

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Need Neighbour Discovery rpm for IPV6
by Norah Jones 16 Apr '13

16 Apr '13

Hi, I need neighbour discovery rpm for IPV6 on CentOS 6.2 any pointer. Actually I am able to find out RHEL 5/CentOS 5 but could not locate CentOS 6 compatible RPM. Thanks, Norah Jones

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how to capture packets that was forwarded
by Jaze Lee 16 Apr '13

16 Apr '13

hello, the topology is like this: centos v0:eth1 <------> centos v0: eth2 fc00:2:3:4::1 fc00:2:3::4 i turned the packet forwarding ping6 -i eth2 fc00:2:3:4::1 the output is PING fc00:2:3:4::1(fc00:2:3:4::1) from fc00:2:3::5 eth2: 56 data bytes >From fc00:2:3::4 icmp_seq=1 Destination unreachable: Administratively prohibited >From fc00:2:3::4 icmp_seq=2 Destination unreachable: Administratively prohibited >From fc00:2:3::4 icmp_seq=3 Destination unreachable: Administratively prohibited >From fc00:2:3::4 icmp_seq=4 Destination unreachable: Administratively prohibited why the box do not forwarding icmp packets to eth2? and how to set forwarding rules on centos 6.3? Thanks

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CentOS-announce Digest, Vol 98, Issue 7
by centos-announce-request＠centos.org 16 Apr '13

16 Apr '13

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. CESA-2013:0742 Low CentOS 6 389-ds-base Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Tue, 16 Apr 2013 11:10:18 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CESA-2013:0742 Low CentOS 6 389-ds-base Update To: centos-announce(a)centos.org Message-ID: <20130416111018.GA17537(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2013:0742 Low Upstream details at : https://rhn.redhat.com/errata/RHSA-2013-0742.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: cae404b070941e328fde9461d531e37406ef1267a953fb9cea268bfd803378cd 389-ds-base-1.2.11.15-14.el6_4.i686.rpm 6b4d6f4edb3fb3cbad3e09937efed226088ee2f390f35b5e7f367a813460d051 389-ds-base-devel-1.2.11.15-14.el6_4.i686.rpm e2029fa2d0ae508da3d31625945be6d96943de7fa90071191354a4cc8a2086f2 389-ds-base-libs-1.2.11.15-14.el6_4.i686.rpm x86_64: 3a9b33d77a0502a2a321b99bfe0f426f878bedd77ecbbf3c5d40a2b8beb4279a 389-ds-base-1.2.11.15-14.el6_4.x86_64.rpm 6b4d6f4edb3fb3cbad3e09937efed226088ee2f390f35b5e7f367a813460d051 389-ds-base-devel-1.2.11.15-14.el6_4.i686.rpm 00419ac033d73e6982cf0b8cfcbf08eb8c7da9e009290c02401cdfa1b69ab370 389-ds-base-devel-1.2.11.15-14.el6_4.x86_64.rpm e2029fa2d0ae508da3d31625945be6d96943de7fa90071191354a4cc8a2086f2 389-ds-base-libs-1.2.11.15-14.el6_4.i686.rpm 605a41f9fb4db0e64844f0e5fb262d20de068043e1af055361ca9f18866e8556 389-ds-base-libs-1.2.11.15-14.el6_4.x86_64.rpm Source: 05c6b18c66cf415f0d4f382ac5648cb54a9fa463b554d210acdc11ee07234dd5 389-ds-base-1.2.11.15-14.el6_4.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 98, Issue 7 **********************************************

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Regarding : ATI video driver problems
by Mark LaPierre 16 Apr '13

16 Apr '13

I gather from the discussion on the reference thread that I'll be having quite a time with a MB having an Integrated ATI Radeon HD 3000 graphics chip set and a video card using a Radeon HD 6570 chip set when I try to run CentOS 6.4 on it. I was going to ask if CrossFire works with CentOS, but it appears that the integrated chip set isn't going to work at all. Well, ignoring all that, is CrossFire supported by any of the drivers available for CentOS 6.4? If no then what about SLI support? I don't want to paint myself into a corner by building a computer that I'll never get working to full potential. Anyway, here's my wish list as it stands at the moment. Brand Model_Num Mother Board GIGABYTE GA-78LMT-USB3 Processor AMD FX-8150 CPU Cooler Case Cooler Master HAF 912 RC-912-KKN1 Power Supply Cooler Master RS650-ACAAE3-US Memory CORSAIR CMX32GX3M4A1333C9 DVD Burner Lite-On IHAS324-98 Hard Drive Seagate ST1000DM003 Video Card GIGABYTE GV-R657OC-1GI Feel free to suggest changes that might make compatibility less of an issue. I chose the MB because it supports 32G of RAM and also has a parallel port that I need to support my laser printer. I suppose I could use a parallel port interface card with another MB instead. -- _ °v° /(_)\ ^ ^ Mark LaPierre Registered Linux user No #267004 https://linuxcounter.net/ ****

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Re: [CentOS] Apache Issue on CentOS 6
by Banyan He 16 Apr '13

16 Apr '13

I did a quick test on el5 and el6 with these package, httpd-2.2.3-43.el5.centos httpd-2.2.15-15.el6.centos.1.i686 I kept the configuration as what it is in default. The index page is about 7k, 100 connections per second. I barely find the connection is marked as R. Mostly C and _. This is done by ab from httpd. I also did a quick test with slow attack. It's basically slowing the client itself to collect the data from the server. I did 200 connections per second. My server is ok seems. A little bit slow, but not too much. el5 RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR RRRRRRRRCWS..................................................... el6 RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR RRRCRRRRCCCCCCCRWCCCCCWCCCCCCWWCCCCCCCCCCCCCCCCCCCCCCCCCCC...... I also did the capture on the network traffic that I can find out the connections are doing something bad. You may follow the lead here as I mentioned. ------------ Banyan He Blog: http://www.rootong.com Email: banyan(a)rootong.com On 4/7/2013 12:23 AM, linuxsupport wrote: > There is no problem with the hardware, If I installed CentOS 5 then it > works well, at a time out of total 44 concurrent requests 34 were in > reading state > > > On Sat, Apr 6, 2013 at 2:03 PM, Banyan He <banyan(a)rootong.com > <mailto:banyan@rootong.com>> wrote: > > I went to the source code to check this. Seems like it's used for > against the slow request attack from the rate. There is a timeout > and rate set for header and body. > > I'd keep that thought, capture one connection from tcpdump seeing > if they are doing something bad. If not, you seem need a new > server balancing the traffic. > > ------------ > Banyan He > Blog:http://www.rootong.com > Email:banyan@rootong.com <mailto:banyan@rootong.com> > > On 4/6/2013 3:06 PM, linuxsupport wrote: >> I have already checked but all requests are from different IP's >> and even different subnet >> When there are less requests it works ok even if there are more >> than 60% reading requests but during peak time when concurrent >> requests goes beyond 150, due to reading requests it becomes 300+ >> requests processing at the same time and that then Apache stop >> responding as maxclient is set to 300. CPU load also goes up and >> thing become very slow. >> >> >> On Sat, Apr 6, 2013 at 10:33 AM, Banyan He <banyan(a)rootong.com >> <mailto:banyan@rootong.com>> wrote: >> >> I'd recommend you to sort out the connections. Find out if >> they are coming from the same client or the same subnet of >> the clients. Doing a simple tcpdump capture to analyze the >> data seeing if it's a good R or a bad R. >> >> Don't really think it's because of the version. >> >> ------------ >> Banyan He >> Blog: http://www.rootong.com >> Email: banyan(a)rootong.com <mailto:banyan@rootong.com> >> >> >> On 4/6/2013 12:24 PM, linuxsupport wrote: >> >> I am facing a problem with Apache on CentOS 6 >> >> Apache 2.2.19 is complied from source. >> >> I see so many reading requests in Apache status page, as >> per my previous >> experience this "reading request" issue mainly comes when >> any of the >> internet route having any problem and it request takes >> time to completely >> reach to Apache, but this time there is no network issue. >> >> I have ran same setup on CentOS 5 it works well, but on >> CentOS 6 it show >> 60%+ reading requests, web site has 20-25 requests per >> second that becomes >> 80+ >> >> I also tried to upgrade Apache to 2.2.24 but it is same >> on new version as >> well. >> >> Anyone else has experienced this issue? >> _______________________________________________ >> CentOS mailing list >> CentOS(a)centos.org <mailto:CentOS@centos.org> >> http://lists.centos.org/mailman/listinfo/centos >> >> >> > >

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CentOS 6.3 gpgv: Libgcrypt warning: missing initialization - please fix the application
by P J 15 Apr '13

15 Apr '13

Howdy, Seemingly randomly every day the following appears in /var/log/messages gpgv: Libgcrypt warning: missing initialization - please fix the application gpgv: Libgcrypt warning: missing initialization - please fix the application

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