Discuss

discuss@lists.centos.org

34753 discussions

traffic distribution not happening in centos 6.5
by Varun Sharma 02 Jun '14

02 Jun '14

Hi, I am experimenting with libnetfilter_queue. libnetfilter_queue is a userspace library providing an API to packets that have been queued by the kernel packet filter. I am using sample code(nfqnl_test.c) available on netfilter.org. I have generated two binaries (queue0 and queue1) using that nfqnl_test.c sample code. These binaries are working as per expected behaviour in case of Centos 6.2 but with Centos 6.5 only one queue is receiving network traffic. I am not able to understand why only one queue is receiving network traffic in case of Centos 6.5 whereas same network traffic is being distributed in both the queues with Centos 6.2. uname –a :- Linux hwcentos8 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux Machine Info: 16 core machine with 64GB RAM. Command used for iptables in Centos 6.5 :- iptables -A INPUT -j NFQUEUE --queue-balance 0:1 Output In Centos 6.5 :- [varun@exp2 ~]$ ./queue0 opening library handle unbinding existing nf_queue handler for AF_INET (if any) binding nfnetlink_queue as nf_queue handler for AF_INET binding this socket to queue '0' setting copy_packet mode pkt received queue0 hw_protocol=0x0800 hook=1 id=0 hw_src_addr=fc:4d:d4:d3:7f:73 indev=2 payload_len=40 entering callback pkt received queue0 hw_protocol=0x0800 hook=1 id=1 hw_src_addr=fc:4d:d4:d3:7f:73 indev=2 payload_len=40 entering callback pkt received queue0 hw_protocol=0x0800 hook=1 id=2 hw_src_addr=fc:4d:d4:d3:7f:73 indev=2 payload_len=40 entering callback pkt received queue0 hw_protocol=0x0800 hook=1 id=3 hw_src_addr=fc:4d:d4:f1:e1:5f indev=2 payload_len=78 entering callback [varun@exp2 ~]$ ./queue1 opening library handle unbinding existing nf_queue handler for AF_INET (if any) binding nfnetlink_queue as nf_queue handler for AF_INET binding this socket to queue '1' setting copy_packet mode Please let me know if more information is required. Regards varun

2 2

CentOS 6 KVM networking: What am I missing???
by Robert Heller 01 Jun '14

01 Jun '14

OK, I have a strange problem. It is probably something simple/stupid, but I cannot figure it out. I have a nice new PowerEdge T20 that I installed CentOS 6 (6.5) on with Virtualization (KVM). I then installed Ubuntu 14.04 in a virtual machine, with a bridged network: ------ begin ub140464.xml------------------ <domain type='kvm' id='2'> <name>ub140464</name> <uuid>53f7caec-1ff8-3bcd-3387-781dbc686907</uuid> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='x86_64' machine='rhel6.5.0'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> <apic/> <pae/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/libexec/qemu-kvm</emulator> <disk type='block' device='disk'> <driver name='qemu' type='raw' cache='none' io='native'/> <source dev='/dev/vg_newserver00/ub140464'/> <target dev='vda' bus='virtio'/> <alias name='virtio-disk0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </disk> <disk type='block' device='cdrom'> <driver name='qemu' type='raw'/> <target dev='hdc' bus='ide'/> <readonly/> <alias name='ide0-1-0'/> <address type='drive' controller='0' bus='1' target='0' unit='0'/> </disk> <controller type='usb' index='0'> <alias name='usb0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/> </controller> <controller type='ide' index='0'> <alias name='ide0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='network'> <mac address='52:54:00:11:43:29'/> <source network='virbr1'/> <target dev='macvtap0'/> <model type='virtio'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <source path='/dev/pts/1'/> <target port='0'/> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/1'> <source path='/dev/pts/1'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5900' autoport='yes' listen='127.0.0.1'> <listen type='address' address='127.0.0.1'/> </graphics> <sound model='ich6'> <alias name='sound0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </sound> <video> <model type='cirrus' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/> </memballoon> </devices> <seclabel type='dynamic' model='selinux' relabel='yes'> <label>system_u:system_r:svirt_t:s0:c369,c592</label> <imagelabel>system_u:object_r:svirt_image_t:s0:c369,c592</imagelabel> </seclabel> </domain> ------ end ub140464.xml -------------------- ------ begin virbr1.xml --------------------- <network connections='1'> <name>virbr1</name> <uuid>c2621cc7-49d7-a94d-d682-a77a3f1fcbef</uuid> <forward dev='em1' mode='bridge'> <interface dev='em1' connections='1'/> </forward> </network> ------ end virbr1.xml --------------------- The Ububtu VM can connect to the LAN the T20 is on and off into the public Internet. Machines on the LAN (eg my laptop) can connect to Ububtu VM. *BUT* the host server cannot connect to the Ububtu VM and the Ububtu cannot connect to the host server. Netstat -r on the T20 (host server): [root@newserver ~]# netstat -r Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 192.168.1.0 * 255.255.255.0 U 0 0 0 em1 192.168.122.0 * 255.255.255.0 U 0 0 0 virbr0 link-local * 255.255.0.0 U 0 0 0 em1 default server1.wendell 0.0.0.0 UG 0 0 0 em1 Netstat -r on the Ubuntu VM: heller@ub140464:~$ netstat -r Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface default server1.wendell 0.0.0.0 UG 0 0 0 eth0 192.168.1.0 * 255.255.255.0 U 0 0 0 eth0 (server1 is the older PowerEdge server running CentOS 5 that *presently* serves as the router to the public Internet and is also the dhcp and DNS server for the LAN. Eventually, the new T20 server will take that over, once it is fully set up.) I have set up VMs like this on my CentOS 5 (Xen) machine without any problems, but I must be missing something here. -- Robert Heller -- 978-544-6933 / heller(a)deepsoft.com Deepwoods Software -- http://www.deepsoft.com/ () ascii ribbon campaign -- against html e-mail /\ www.asciiribbon.org -- against proprietary attachments

4 3

Centos 6.5
by Manjunath N 31 May '14

31 May '14

Hi, I am using centos 6.4. i am trying to update /proc/sys/fs/epoll/max_user_instances but it seems like it is not supported anymore in /etc/sysctl.conf. How do we update max_user_instances on centos 6.4? Thanks & Regards Manjunath

2 1

"new" computers and monitors
by Michael Hennebry 30 May '14

30 May '14

Until recently, I had a 32-bit machine with one monitor running fedora. The later editions of fedora didn't like it, so I switched to CentOS. Now I have two 64-bit machines and two monitors and a CenturyLink router. Also a KVM switch that I have not taken out of the package. My main machine has two video connections and two ethernet connections, eth0 and eth1 . I've never had more than one machine or more than one monitor before. I'd like to be able to use both monitors at once on my main machine. I'd like to be able to switch one monitor between machines without too much trouble. I'd rather not where the pins out. KVM will do this, right? KVM is transparent to the computer, right? My secondary machine sometimes runs Windows, so I'd like it not to have its own global IP address. My first thought would be to connect it directly to one of the ethernet ports on my main machine. How do I go about this? The answer I am expecting is one or more links to tutorials or the like. -- Michael hennebry(a)web.cs.ndsu.NoDak.edu "SCSI is NOT magic. There are *fundamental technical reasons* why it is necessary to sacrifice a young goat to your SCSI chain now and then." -- John Woods

11 26

OEM suggestions
by m.roth＠5-cent.us 30 May '14

30 May '14

Hey, folks, I'm working on finding some new compute nodes. What I'm looking for is a 64 core box, with room enough for a lot of RAM. I can get it from Dell, or HP (bleah! a 4U box), but I need to have three quotes, y'know. We've gotten a lot from Penguin in the past, but they're all Supermicro, and we've had a *lot* of problems with the 64 core boxes, so I'm looking for another vendor. Suggestions? Recommendations? People to run the other way from? (Sun/Oracle is down there *under* "none of the above"). mark

11 37

Tracking Open Ports
by Eric Falbe 30 May '14

30 May '14

Hi All, I was wondering if anyone knew of a way to notify or log when a specific remote port is openened? I have an old LDAP server that I am looking to get rid of, but there is still a few queries reaching it. The sytem authentication is setup correctly (as is Postfix), so I am thinking there must be some script or program that is setup to query the older LDAP server. I tried using lsof -i|grep 389, but I am not quick enough to get results before the socket is closed. Is there any program or script I could write to detect when this socket gets opened, and what PID and/or program owns it? Thanks, Eric Falbe

6 6

CentOS-announce Digest, Vol 111, Issue 15
by centos-announce-request＠centos.org 30 May '14

30 May '14

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-2014:0569 CentOS 5 gfs2-utils Update (Johnny Hughes) 2. CEBA-2014:0571 CentOS 5 java-1.7.0-openjdk Update (Johnny Hughes) 3. CEBA-2014:0572 CentOS 6 ibus-table FASTTRACK Update (Johnny Hughes) 4. CEBA-2014:0570 CentOS 6 iproute Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Thu, 29 May 2014 13:30:00 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2014:0569 CentOS 5 gfs2-utils Update To: centos-announce(a)centos.org Message-ID: <20140529133000.GA504(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2014:0569 Upstream details at : https://rhn.redhat.com/errata/RHBA-2014-0569.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: df64a4378505afee7a8f09ab4b60136fc5bd0dd31cecdcf6422e341984ea7f64 gfs2-utils-0.1.62-39.el5_10.3.i386.rpm x86_64: 2a1b7cadd39d0e5887c8edd7ac4b61b383da664a149c194f23788877ef2f9553 gfs2-utils-0.1.62-39.el5_10.3.x86_64.rpm Source: 1ba5063d700b93b4f2dca75b1117f2214166b53306b055d6a66fe1e2cbcc5fad gfs2-utils-0.1.62-39.el5_10.3.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Thu, 29 May 2014 13:46:41 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2014:0571 CentOS 5 java-1.7.0-openjdk Update To: centos-announce(a)centos.org Message-ID: <20140529134641.GA2050(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2014:0571 Upstream details at : https://rhn.redhat.com/errata/RHBA-2014-0571.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 861a383b7d8c54c1fd174ee50a19094691e67b65dd3e36ee7714e78645857470 java-1.7.0-openjdk-1.7.0.55-2.4.7.2.el5_10.i386.rpm e916d0444c1ac33f4d8a764a91512c3efff34dd9a8531a760a716cb46b600208 java-1.7.0-openjdk-demo-1.7.0.55-2.4.7.2.el5_10.i386.rpm 8d6170a6bafb6ed81cdd2e4f3be0239fd7422c9c204078889871e0257e72683f java-1.7.0-openjdk-devel-1.7.0.55-2.4.7.2.el5_10.i386.rpm 06a543e22f65ff2fbc17af52da3d8000f253be1224469550948ccb3bb1876a6b java-1.7.0-openjdk-javadoc-1.7.0.55-2.4.7.2.el5_10.i386.rpm 96e45ecef7924cd51330160be422baa846dd62840c8ce1e86168c7df2fab19b8 java-1.7.0-openjdk-src-1.7.0.55-2.4.7.2.el5_10.i386.rpm x86_64: 10f6de29a4b295ed000f666ad5bbeeb720f99a74cc39334f1597cd8d1f3c1575 java-1.7.0-openjdk-1.7.0.55-2.4.7.2.el5_10.x86_64.rpm cf62cafa02e44dcfc1b71e4ab2973de3064172c8f4915c4f3d855a8583e8f7ef java-1.7.0-openjdk-demo-1.7.0.55-2.4.7.2.el5_10.x86_64.rpm bebd4ec55f417749220e5b9dc844630e447ec6a310c239c21429e5ba40ba0d2b java-1.7.0-openjdk-devel-1.7.0.55-2.4.7.2.el5_10.x86_64.rpm 12e644beadf558502a2ab34aa2a14dc966dd446632ce21f67afeb1da5b7ae00e java-1.7.0-openjdk-javadoc-1.7.0.55-2.4.7.2.el5_10.x86_64.rpm 9fd537778d5a9f6e23a0744be6449ca924f7860964bd649d240b3ed911d1d1b2 java-1.7.0-openjdk-src-1.7.0.55-2.4.7.2.el5_10.x86_64.rpm Source: 26a0f7bbc3cafe87008a8c1d62dab6b5f201d691c96cb796bccf4055bb8d3728 java-1.7.0-openjdk-1.7.0.55-2.4.7.2.el5_10.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 3 Date: Thu, 29 May 2014 13:49:07 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2014:0572 CentOS 6 ibus-table FASTTRACK Update To: centos-announce(a)centos.org Message-ID: <20140529134907.GA33584(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2014:0572 Upstream details at : https://rhn.redhat.com/errata/RHBA-2014-0572.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 5632ab3aaad7983670ae5a919c31f3048b3bc0ae60cc0ce4f539e39fc44e02dd ibus-table-1.2.0.20100111-5.el6.noarch.rpm 1750d4a0a45a5aec63f021312f8977581c0f12a30b32b7542293f9b9b4bfc42f ibus-table-additional-1.2.0.20100111-5.el6.noarch.rpm 111a6134d60342b4e3c609a5a77b3b54bd0a764dc2a3c0b87d3e314bb8e632d4 ibus-table-devel-1.2.0.20100111-5.el6.noarch.rpm x86_64: 5632ab3aaad7983670ae5a919c31f3048b3bc0ae60cc0ce4f539e39fc44e02dd ibus-table-1.2.0.20100111-5.el6.noarch.rpm 1750d4a0a45a5aec63f021312f8977581c0f12a30b32b7542293f9b9b4bfc42f ibus-table-additional-1.2.0.20100111-5.el6.noarch.rpm 111a6134d60342b4e3c609a5a77b3b54bd0a764dc2a3c0b87d3e314bb8e632d4 ibus-table-devel-1.2.0.20100111-5.el6.noarch.rpm Source: b46530795ebff85c969b3e2fa38a6a1b64edfffe51c8853bcd9102102f08d272 ibus-table-1.2.0.20100111-5.el6.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 4 Date: Thu, 29 May 2014 13:49:38 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2014:0570 CentOS 6 iproute Update To: centos-announce(a)centos.org Message-ID: <20140529134938.GA33826(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2014:0570 Upstream details at : https://rhn.redhat.com/errata/RHBA-2014-0570.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 31a7240ff770ddd2f18715bccd1907f290b22468f2fa7d654e912e242cdeafcb iproute-2.6.32-32.el6_5.i686.rpm ab480269824cfbc232e526cc29f5cd8a4a4728121e5dbb906286a8862b34b80d iproute-devel-2.6.32-32.el6_5.i686.rpm ff19d039eb2787620f61cfb8de1bcf621b25132d19e73040513c0ec3545a485a iproute-doc-2.6.32-32.el6_5.i686.rpm x86_64: 79711ce75632a05d5cd2f91bef3a4de1c4567cc01db7b6088e3eb3fbdea2ffc5 iproute-2.6.32-32.el6_5.x86_64.rpm ab480269824cfbc232e526cc29f5cd8a4a4728121e5dbb906286a8862b34b80d iproute-devel-2.6.32-32.el6_5.i686.rpm 339ed6500b7e67c33efdb2bee3353f6978d726cac64cfc91676fe77e2f1ac6b0 iproute-devel-2.6.32-32.el6_5.x86_64.rpm 86440aacab4a29963a92c42114f69780f731878f7eeb4b744e9ecf1d24f4bba7 iproute-doc-2.6.32-32.el6_5.x86_64.rpm Source: e1266658c6b53ec9c6274e2680b91d58a9b9ac9ffb79be073b830ec4fcb4f2de iproute-2.6.32-32.el6_5.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 111, Issue 15 ************************************************

1 0

clamav
by Emmett Culley 30 May '14

30 May '14

Every time I update my system with clamav, it doesn't restart and freshclam no longer works, because of a permission issue on the log directory. Each time I update clamav I have to search the Internet to figure out what there is to do. That NEVER helps so I try different combinations on user and group in amavis-new and clamav configuratio files, until I eventually get them both to work. I am getting clamav and amavisd update from the epel repo. What can I do to prevent this from happening? Emmett

1 0

my setup
by zep 30 May '14

30 May '14

I'm not sure if this is helpful to anyone else and I can't decide if it's mildly clever or just a stupid pet trick, really. I recently decided to reinstall my work laptop with centos. as part of the install I used an 8g sandisk USB drive; it's roughly the size of a wireless mouse receiver. I put /boot, / and /usr on the USB drive, set encrypted partitions for swap, /home, /opt, /var and put them as well as the boot loader the internal drive. so now the USB drive is quite literally acting like a 'key' for whole laptop. with no drive, the laptop comes up to an error like 'No OS found' or something of the like. anyway, not sure anyone else will find it useful, helpful, interesting or anything else, but I felt like sharing, I guess.

2 1

EFI & grub on a Dell PowerEdge T20...
by Robert Heller 29 May '14

29 May '14

OK, I have installed CentOS 6.5 on this beast using parted to make GPT partitions (royal PIA, but done). The machine has three 500G SATA disks with 4K sector sizes. Partitioned with three partions for each of the main disks: sda1 => FAT32 => /boot/efi sdb1 => FAT32 => (not presently mounted, but will be a backup copy of /boot/efi). sda2, sdb2 => /dev/md0 => ext4 => /boot sda3, sdb3 => /dev/md1 => LVM VG, containing /, /home, swap, soon others sdc1 => will be an ext4 and will hold backups. I went into the BIOS and added a UEFI boot option using sda1: "C:\EFI\redhat\grub.efi", but this boots to the grub shell. Doing a device (hd0) /dev/sd0 root (hd0,1) configfile /grub/grub.conf boots up the machine, but how do I make it possible to boot the machine automagically? -- Robert Heller -- 978-544-6933 / heller(a)deepsoft.com Deepwoods Software -- http://www.deepsoft.com/ () ascii ribbon campaign -- against html e-mail /\ www.asciiribbon.org -- against proprietary attachments

1 0

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

Discuss