Networking :: Clustering RHEL 5.2 Server?

Mar 2, 2010

My current project environment setup is having a single server, running on RHEL 5.2, that is constantly receiving incoming data (video and text) over a periodic interval e.g. every 30 minutes. Initial in-house testing projected the server will be generally busy, so we decided to incorporate a second server for load balancing purposes. So now, server A and B will need to be clustered. Once that is done, incoming data will balance out between the two server (or at least that is what I will like to achieve. Note, I'm aware that at the switch side, I'll need to do some additional configuration and that part is covered).

I've been reading on Red Hat Cluster Suite and the Linux Virtual Server (LVS) seems the way to go. However, I noted that the LVS solution require at least a two-tier solution, and that would incur 3 additional servers instead of just 1. So here's my questions:- I looked around and probably know the answer, but I'm gonna ask anyway. Is there a one-tier solution for LVS i.e. have anyone tried or whether it's even feasible. From my reading, it don't seem so but just want another opinion. Is there any other way for me to do the clustering (for load-balancing) without LVS?

Sidenote: I'm currently looking at Ultra Monkey and will be trying out in a while. However, the project I'm doing would be rolled out to live site eventually, and my customer is kind of....particular. I'm just wondering if there's a software/application (that need to be purchased) and comes with support.

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Server :: Clustering With No PXE Boot?

Apr 17, 2011

I have some chassis with this motherboard [URL] that don't have PXE boot. What is the best way to cluster them?

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Server :: Figure Out Ho To Setup EC2 Clustering?

Mar 16, 2010

I am trying to figure out ho to setup EC2 clustering. I am seeing heartbeat as an option. I need something that will monitor the state of a daemon, and not if a daemon is running. For example, say I want httpd to be high availability. Does heartbeat monitor if httpd is not in a hung state, or does it simply do a ps -e |grep httpd? So my question is, how does heartbeat work?

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Server :: Good Links To Know More About OS Clustering In System?

Dec 1, 2010

Share good links to know more about OS clustering in Linux.

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Server :: Red Hat 5.4 Kickstart / Clustering And KVM Installation Failing

Mar 14, 2011

I added the "@clustering" and "@kvm" keywords to my ks.cfg file but during installation, an error about not being able to find either of these packages popped up and it wasn't installed.

I do see the Cluster and VT directories in my redhat_es5.4 directory along with the Server directory. The rest of the files install just fine.

In doing some net and forum searching, I find a reference to a base.repo file that lists the directories but I'm not sure if it's related to creating a yum repository or if not, should it have been created in the redhat_es5.4 directory.

While I've built kickstarts for several years and am comfortable with the file, this is the first time I'm working with rpms outside the main Server path.

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Software :: How To Install The Clustering Application On Server

May 12, 2010

Having issues installing Clustering Software on server: rhel-x86_64-as-4-cluster I am running the following kernel:

The server is up to date with updates, but I am having trouble installing the Clustering software and don�t know what to do now�
# uname -r


How can I get this installed ?

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CentOS 5 Server :: Web Server Clustering With Centos5.2

Mar 22, 2009

To clustering my web server so that it becomes Highly available. Its currently running php, apache and mysql with no redundancy in place. I want to be clustered so that if one node goes down then the second one will automatically take over. I have done that with HA in RHEL but I want to use centos clustering solution for this. Also how willl they share the web contents and mysql database among two nodes I have no idea. I have managed a iscsi target to store contents but it doesn't work as expected.

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Server :: Clustering Mail Servers (CentOS/Amazon EC2)?

Feb 23, 2011

I'm looking to set up a clustered mail server, I kind-of know how I'm going to do it but wanted to check if there was a better way. So we have 3 mail servers, running as EC2 instances on Amazon AWS. We were going to achieve clustering by giving all three a shared EBS storage device to store the mail. The mail would be received by any of the three servers (Via postfix) and could be retrieved from any of the three servers (via dovecot). For receiving mail (SMTP), the domains would have 3 MX records pointing to each of the servers but for sending and retrieving mail (SMTP and POP3/IMAP) the three servers would have one DNS A record with 3 IPs associated (I know when using this method for web-servers, the load gets distributed among the IPs under that record but I'm not sure if this will work for SMTP/POP3/IMAP).

What we want is to have 3 servers that share the load equaly but are completely redundant for all services (POP3, IMAP and SMTP). We also need to be able to scale upwards so if we need to add more servers we can do easily. Also the servers must be perfectly synchronized at all times.

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Server :: Looking For An Open Source Active Clustering Product?

Jul 12, 2010

I am looking for an open source active clustering product can you please advise me about the best clustering softwares on Linux?

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Server :: Edit The Default RHEL CD To Have It Automatically Install RHEL Based Off Of A Kickstart File

Mar 2, 2011

is possible to edited the default RHEL CD to have it automatically install RHEL based off of a kickstart file that I will store locally on the CD. My plan would be to put a cd in a server and have the OS automatically being installed.

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Server :: Configuration Difference Between RHEL 3 To RHEL 5 For Webserver Installations?

Feb 1, 2011

We are planning to migrate our LINUX server from RHEL 3to RHEL 5. What are the configuration difference between RHEL 3 to RHEL 5 for webserver installations?

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Networking :: Configuring Different Network IPs In DNS Server For RHEL 5?

May 19, 2010

My DNS server is baring 192 series IP for ex:, need to configureloadbalancer IP in that DNS server, where loadbalancer is baring 172 series IP. for ex : it possible to cofigure the loadbalancer ip in DNS server? if it is, please let me know the configuration details and procedure.

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Server :: Major Differences Between Rhel 5.2 And Rhel 5.4?

Dec 14, 2010

what are the major differences between rhel 5.2 and rhel 5.4

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Red Hat :: Duplicating A RHEL 5.1 32bit Server On RHEL 5.4 64 Bit

Dec 9, 2009

I have a database server running RHEL 5.1 32 bit that suffered some catastrophic failures about 6 months ago. We were able to patch it back together and keep it running, but now the manufacturing site it supports is going to shut down for two weeks and I would like to replace it permenantly. Does anyone have any guidance for that sort of thing? I'd like to have the new server up and running before hand, basically changing the hostname/ip and restoring the databases only on conversion day. I've done this in the past with HP UX - Red Hat conversions, but this is my first red hat to red hat move. Any advice or shortcuts?I forgot to add the other wrinkle. The new server will be running 64bit linux.

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Networking :: Nscd: Nss_ldap: Reconnected To LDAP Server Errors RHEL 5.4

Nov 24, 2010

I'm a network services rookie and I am seeing this error, but it doesn't seem to be effecting functionality. Nov 22 12:12:16 r01 nscd: nss_ldap: reconnected to LDAP server ldap:// after 1 attempt This error is scattered through out my logs. We are authenticating this Red Hat server to another OpenLdap server. Everything seems to work just fine and we are not even using Kerberos as this is a render server. We set-up ldap right in the GUI, nothing fancy.

RHEL 5.4, Basic install, again, nothing fancy. LDAP does seem to be working fine and allows the right people to login to the machine. We have two of these machines running and both are configured exactly the same and getting the same errors.

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Networking :: Sharing Internet Connection To Thin Client From RHEL Server 5

Sep 22, 2010

plz can any one help me in configuring linux server 5.0 to share the internet connection to thinclient and the steps reqiure at client side and server

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OpenSUSE :: Where Is Repositories For Ha-clustering

Aug 5, 2010

Empty: Index of /repositories/server:/ha-clustering:

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Ubuntu :: Build An HTPC Using Clustering?

Jun 16, 2011

I'm trying to get an HTPC going, but I don't have any money to purchase a new computer. I have 2 desktops in my possession that I am trying to use: 1 is a 2.4 GHz with a 128 MB Radeon 9800 PRO video card (I think) and 1.5 GB RAM (the system is about 8 years old, but I built it top of the line for back then). The second system is a 3.2 GHz dual core with on board video and 2 GB RAM.The problem is, neither system will run 1080p video's without dropping hundreds of packets producing very choppy audio/video. I was wondering if it is possible to cluster these two systems together to harness both their processing power to run 1080p video? I would just jump in and attempt it, but as I have been reading, it looks like processes aren't actually shared across PC's, but auto determined which PC it will run on based on load, which is an issue since neither can cleanly run the 1080p video.

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General :: Code For Passive Clustering In NS 2.34?

Apr 4, 2011

How can I get the NS Code for passive clustering in NS 2.34

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Ubuntu Servers :: Configure Clustering For 2 Nodes?

Mar 11, 2010

I want to connect two systems in clustering concept. am new for clustering configuration. I have installed ubuntu 9.10 server edition in two system. what do to the next step to configure clustering in ubuntu 9.10 server edition.

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General :: HA / LB Clustering With Specific Software Requirements?

Jun 16, 2010

I am looking to build up a HA/LB linux cluster with specific software requirements. For hardware, I have a number of dual xeon PE 2650s and would like to use them as efficiently as possible. These are 32bit systems, I anticipate scaling up to 64bit systems when I have a tested, working solution in place. For distro, I am familiar with CentOs, Gentoo and Ubuntu but unsure as to which would be the best foundation, although leaning towards CentOs. For software, I need to realise all the services provided by xampp (Apache, MySql, PHP, Perl, FTP), plus Red5 flash media server.

My current train of thought is;
6 physical servers; 2 Directors/Heartbeat, 2 Apache, 2 Red5
Gigabit private network for connecting the nodes.
CentOs 5.5 on all nodes.
DRDB across the 2 Apache nodes for Apache, MySql, PHP.
DRDB across the 2 Red5 nodes for Red5.

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General :: Apache Clustering On Virtual Machines?

Feb 5, 2010

I am Working On Citrix Xen Server.I have Installed two Virtual Machines(Centos 5.3).Now Apache is Configured and its running on the First VM.Can I Set up a Apache Clustering On those VM?.My Aim is "If Apache On the First VM Down,then Apache on Second VM Should Automatically Start".Is there Any Tutorial to Setup Apache Clustering On Virtual machines.

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Server :: Error: Failed To Retrieve Repodata/filelists.xml.gz From Rhel-x86_64-server-5

May 24, 2010

I am getting these error in RHEL 5.3 while i did "yum update".

---> Package libstdc++-devel.i386 0:4.1.2-46.el5_4.2 set to be updated
---> Package libstdc++-devel.x86_64 0:4.1.2-46.el5_4.2 set to be updated
---> Package libstdc++44-devel.i386 0:4.4.0-6.el5 set to be updated


The program package-cleanup is found in the yum-utils package.

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Server :: RHEL 5 Proxy Server - Remove Temp Files And Cache

Oct 9, 2010

RHEL 5 is my proxy server. i want to remove temp files and cache . How do i remove cache and temp files.

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Server :: RHEL 5.1 After Installing Mod_ssl Httpd Server Won't Start / Get It To Work?

Apr 11, 2010

I am trying to do a https access with virtual hosting with apache.

But when I install mod_ssl rpm httpd server does not start again

I am stumped

httpd -t shows syntax is OK

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General :: Cannot Ssh Into RHEL 5.5 Server Unless SSHD Server Debug Is Enabled?

Aug 11, 2010

I cannot ssh into an RHEL 5.5 server ( from another RHEL 5.5 server ( unless server debug is turned on, and even then, I have to wait several minutes before the connection is established. scp to and from the 104 server is also not working.Here is the debug output on the 101 server when server debug is not enabled on the 104 server-:

[applmgr@tclg-clone-01 ~]$ ssh -vvv
OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008


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Server :: Setting Up Sendmail On A Blank RHEL 5.5 Server Setup

Jun 21, 2010

Having some issues setting up sendmail on a (basically) blank RHEL 5.5 server setup. My ultimate goal is to be able to automagically send logs / errors / notifications to ourselves from the server.

Our basic setup is a Win 2003 domain with exchange running on

I've edited the '/etc/mail/' and added the :


line to it.

Also added the domain ( to the '/etc/mail/local-host-names' files

Also edited and added


When I try and send a mail from root or a test user to one of the domain accounts, it seems to go fine, i.e no errors are reported but it never gets delivered.

From the mail logs:


So it seems to be sent to the queue no problems and when I check the queue :


Total requests: 0

Not nothing ever gets received. Am I missing something? I have read and read and read but dont seem to be getting any furthur.

So in the end this server doesn't need to do anything except be able to send mail from root to an external mail address.

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Server :: Unable To Run Any Command On Server With RHEL 3 ES Due To Relocation Error

Oct 29, 2010

In oreder to run an application software on RHEL 3 ES server, I created a link forcefully using following command from root id:
# cd /lib64/tls/
# ln -sf
before that I copied file from a workstation with OS RHEL 4 WS so that a link can be created.
Now I am unable to run any command except cd & pwd and it gives error messaage as given below:
ls:relocation error:/lib64/tls/ _rtld_global_ro,version GLIBC_PRIVATE not defined in file link time reference.

Before running this command was pointing to file in path /lib64/
I am now unable even to open a new window on the server.Please send me some solution as early as possible because this server is running production data and many users are runnig application on this server.

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Server :: Windows 7 Can't Write To RHEL 3 Server When Files Greater Then 1kb?

Mar 12, 2010

we are running a Red Hat Enterprise Linux ES release 3 (Taroon Upd 5) Kernel 2.4.21-32.ELsmp since several years. The server hosts an old ERP system who will be replaced at the end of the year.However it is necessary that some collegues are able to write some files to that server regulary. Since we are running Windows 7 on several machines, those users aren't anymore able to write to the samba share. Getting files from the share works fine.

But the problem seems not to be situated at the samba service because also the transfer using SSH (WINSCP) from any Win7 system to the server doesn't work.During testing we recogniced that transfering files smaller then 1kb works fine ... any file greater then 1kb ends up in an connection abort. This works with samba and also using SSH.All the workarounds editing some registry entries in Win7 for improving the interoperability between vista / win7 and samba don't work for us ... and also seem not to be the source of the problem.Is there a general known incompatibility between our RHEL version / kernel and Windows 7 regarding file transfers?

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Server :: Need Info On Ovzkernel-PAE 2.6.18-53 Package For RHEL 5 2.6.18-53 Server

May 24, 2010

I have a RHEL 5 server with 32 bit architechture that is not recognizing more that 4 GB of RAM and I am trying to locate a version of the kernel-PAE package that will work well with the 2.6.18-53 kernel. I found something on Open VZ called ovzkernel-PAE that is built for the 2.6.18-53 kernel [URL]

and wanted to find out if there were any known issues with this release before I attempted to install it. Is anyone aware of any issues with any rpms on or with this particular rpm in general?

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