similar to: Centos 6.3 x86_64, drbd, which repo? atrpms or elrepo?

Hi All. I have a setup in which I have two servers serving nfs share. The nfs service is made highly available with pacemaker. When the primary server goes down the secondary starts nfs service. Service IP is floating between servers but they have NO "shared" storage/filesystem so NFS state/connection information in case of failover is lost. I have two clients. When the failover from

Hi All. I have two running servers (drbd primary, drbd secondary). When there is a problem with one of them we switch to the second one. Currently on the /dev/drbd0 (it has /xxx ext3 filesystem directly on it) we have some filesystem problems (after fsck -n). I would like to correct these errors but the filesystem should be unmounted first (I would like to avoid it if possible). Is there a way

Hi all. I am currently working for a hosting provider in a 100+ linux hosts' environment. We have www, mail HA solutions, as storage we mainly use NFS at the moment. We are also using DRBD, Heartbeat, Corosync. I am now gathering info to make a cluster with: - two virtualization nodes (active master and passive slave); - two storage nodes (for vm files) used by mentioned virtualization nodes

Hi all. I have two hosts with drbd: kmod-drbd83-8.3.8-1.el5.centos drbd83-8.3.8-1.el5.centos and kernel (CentOS 5.7): 2.6.18-308.4.1.el5 After a recent upgrade of kernel I have had two sitiuations when my ext3 filesystem on /dev/drbd0 became read-only. I've checked disks with smartctl -t long, they are ok. There are no messages with disks problems in /var/log/messages | dmesg. I've made

Hi all. Currently I am administering a mail cluster in which messages are stored on software RAID shared with NFS. There are several NFS servers, every one of them exports a part of all mail files for a specific frontend with postfix. We are thinking about replacing these storage hosts with one solution, maybe a storage array with appropriate disk space and I/O capacity. What are pros and cons

Hi all. I am currently designing a server room. I would like to be able to draw a 2D (in the future 3D) project. Do you know any tools? Which one can you recommend? Best regards, Rafal Radecki.

Hi All. I plan to use virtualization in my production environment. I plan to use one of the following options: - KVM; - VMWare Esxi; - VMWare Workstation. I plan to install Windows 2008 as a guest. I want to use something like LVM snapshots for backups. Stability is also very important, the guest will be used as a production server. Which option could You recommend and why? Thank You very much

Hi all. I have two servers 2.6.18-308.4.1.el5PAE CentOS release 5.7 (Final) Both have two external gigabit network cards (installed Planet with Realtek r8169 chipset). lspci 04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet (rev 10) 04:01.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet (rev 10) /var/log/messages May 3

Hi all. I am currently building a small test cloud based on Eucalyptus 2.0.3 and CentOS 5.8 x64. I have a choice which hypervisor to use: KVM or XEN. KVM is the default in CentOS 6 but I have read also many good things (for example PV guest machines, isolation between Dom0 and DomU) about XEN. Key factors from my opint of view are: - stability (which one runs more smoothly on CentOS?) -

Hi all. I am currently building a small test cloud based on Eucalyptus 2.0.3 and CentOS 5.8 x64. I have a choice which hypervisor to use: KVM or XEN. KVM is the default in CentOS 6 but I have read also many good things (for example PV guest machines, isolation between Dom0 and DomU) about XEN. Key factors from my opint of view are: - stability (which one runs more smoothly on CentOS?) -

Hi all. I am working for a hosting provider in Poland. We are currently searching for an universal, extensible hardware platform which we would like to use in our server infrastructure. The platform should have: - possibility to install up to 32GB of RAM and at least 4 slots for it; - at least 6 SATA ports; - the possibility to use SAS disks; - at least one 1Gb/s network interface and the

Hi All. I've found: This directory (and version of CentOS) is depreciated. For normal users, you should use /6/ and not /6.3/ in your path. Please see this FAQ concerning the CentOS release scheme: http://www.centos.org/modules/smartfaq/faq.php?faqid=34 If you know what you are doing, and absolutely want to remain at the 6.3 level, go to http://vault.centos.org/ for packages. Please keep

Hi all. I have currently a task to implement a network traffic analyzer. Some years ago I've used NTOP for that purpose, I would also like to test some alternatives. Which alternatives can you recommend and why? Thanks ;) Best regards, Rafa? Radecki.

Hi All. I have a CentOS server: CentOS 5.6 x86_64 2.6.18-238.12.1.el5.centos.plus e4fsprogs-1.41.12-2.el5.x86_64 which has a 11TB ext4 filesystem. I have problems with running fsck on it and would like to change the filesystem because I do not like the possibility of running long fsck on it, it's a production machine. Also I have some problems with running fsck (not enough RAM, problem with

Hi All. I have two servers ("master" and "slave") with a replicated gluster volume. Recently I've had a problem with slave and gluster does not work on it now. So I would like to: - stop and remove current volume on master (on slave it is not accessible); - stop gluster software on master (already stopped on slave); - remove gluster software on master and slave (previous

Hi All. I want to use mentioned version of glusterfs in a simple master/slave setup (production servers). Two nodes have a replicated volume and the both mount it using glusterfs. What are your experiences with gluster 3.3? Is it stable? Have you had any serious problems? I do not have much experience with gluster and would like to avoid problems if possible. Best regards, Rafal Radecki.

Hi all. I am thinking about installing memcached with replication, I've found http://sourceforge.net/projects/repcached/files/repcached/2.2.1-1.2.8/ but it is for 1.2.8, and for Centos 6.3 memcached is in version 1.4.4. I do not want to use client side "replication" (writing to two memcached nodes at the same time) and haven't found other solution. Are there any good, protocol

Hi All ;) I need a good tool to backup whole system on block level rather than file level and easy to use. I currently need to backup to an USB disc (50+ GB of data) a system and then reinstall it. In the future if needed I will revert to the system from backup ;) What can you recommend? BR, Rafal.

Hi All. I currently have a problem with hostname and fqdn. I use: # cat /etc/redhat-release ; uname -r CentOS release 6.4 (Final) 2.6.32-358.11.1.el6.centos.plus.x86_64 # hostname srv1.devel.test.com # grep HOSTNAME /etc/sysconfig/network HOSTNAME=srv1.devel.test.com # cat /etc/hostname srv1 # cat /etc/domainname devel.test.com but # hostname --fqdn devel.test.com As I think it should

Hi all. I am currently gathering information about firmware update on Dell PowerEdge machines. I've found http://linux.dell.com/wiki/index.php/Firmware-tools_announcement and https://linux.dell.com/repo/community/ It is an unofficial, community supported repository. What are your experiences: should I perform firmware updates the traditional way by downloading *.bin packages from Dell and