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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Aug 1, 2011
It should not have any /home/. It only can access a folder and that folder is home default for this account.
Details about my usage: We have a simple folder which contains demo code and we want to create a user to read this folder only
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Oct 23, 2010
I'm needing to stand up a Lamp server for a SugarCRM migration. I've been told I need to ensure php 5.2 on the box along with ensuring several mod's are installed as well for php and apache. I was planning on using the lamp provided from xampp (apache friends) but they're current build is using PHP 5.3, any suggestions on how to get around it? If I have to build the whole thing from several packages (apache, php, mysql) then no problem, but I really like the myphpadmin page that comes with the xampp installer.
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Apr 4, 2011
How can I get the NS Code for passive clustering in NS 2.34
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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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Aug 16, 2010
We have zabbix Network monitoring tool installed on two servers 172.17.11.6 ( Master ) and 172.17.11.3 ( Slave ) RHEL 5.4 Servers with 172.17.11.4 being Virtual Ipaddress.We are trying to implement High Availability with Red Hat Cluster Suite.OS level Clustering has been implemented with following cluster configuraiton.
But we need to implement Application level clustering for Zabbix_server process which inturn depends on httpd and mysqld deamons to be running.So I have to check the health of mysqld and httpd with a shell script along with the health of zabbix_server process.Any good tutorials for this ? Any guidlines that I have to follow ?Here I may need to take care of following things when any one of the process goes down
1. Shifhting Virtual IP
2. Shifting /dev/sdb1 ( Shared drive to slave )
3. stopping other services on master
4. starting all the services on slave
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Dec 2, 2010
for example
else {
for fileDOC in $location/*.doc
do
[code]...
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Nov 25, 2010
it is not clear to me, by reading different postings/documentations for ntfsclone, what restrictions and/or requirements exist for the target partition (TARGET). Can the TARGET be bigger in size than the SOURCE, or must it be identical? Must the TARGET be formatted as an NTFS filesystem, or must it left unformatted?
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Jan 26, 2010
I'm a new Linux user (Ubuntu), and i need a simplified explanation of how to install and configure OpenCA in order to test it and anderstand how it works.
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Mar 2, 2011
I wanted to test my first and relatively small SSD hard drive (32 GB) and started wondering how much disk space do I need for Windows XP SP3 and Fedora 13 installation. I started searching for information and created my own page listing loosely system requirements, because it seems to be difficult to find minimum and especially typical installation disk space consumption.
Has anyone made a single page listing minimum, typical and recommended system requirements, so you can easily use that single page for comparing operating system requirements especially how much hard disk space is needed?
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May 20, 2010
I am wondering if you can play Runescape on Puppy Linux(Slackware) with Java, Flash, and the plug-ins are all installed, and i use a Live Usb. Is this possible? Recommended Requirements(and please don't write the bare minimum)
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Feb 7, 2010
Does kde3.5 differ much in memory requirements from kde4? I'm running kde4 on an old thinkpad with 256mb ram and everything is a little slow...
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Aug 5, 2010
Empty: Index of /repositories/server:/ha-clustering:
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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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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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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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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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May 18, 2010
I want to record an internet radio station starting at 2:00am tomorrow morning. The specific program on the radio station lasts until 6:00am. The command I need to run to record the station is: Code:mplayer http://wjcu.jcu.edu:8001/listen.pls -ao pcm:file=indie_heat_of_the_night.wav -vc dummy -vo nullI'd use cron, but 1. I'm not sure how to and 2. it seems unnecessarily complicated for something that I only want to run once. If cron is the only/easiest solution, I guess I'll just have to resort to that, but I'd rather not.
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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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Dec 1, 2010
Share good links to know more about OS clustering in Linux.
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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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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
2.6.9-89.0.25.ELsmp
#
[code]....
How can I get this installed ?
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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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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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Jun 8, 2010
How do I give permission to a logged in user to stop/start a specific service without entering a root/sudo password? So they can do a simple "service SomeService stop|start" It is for a headless Ubuntu server.
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Jul 24, 2010
I need to search a bunch of files in a specific folder for a specific number and add all the numbers together to a total sum. I use Rsync everyday, everytime I run rsync i get a logfile (rsync output) witch contains the textstring "Total bytes sent: xxxxxx".
The "xxxxx" can vary in lenght. I need to extract the "xxxxxx" from each file and add the numbers together to a total size over a week or a month. Is this possible? And I wish to only use bash. One way of doing stuff at a time my friends .
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Jun 9, 2010
my system I want user1 and only user1 to be able to mount and unmount a specific partition, this partition contains backups and is usually mounted read only, needs to be temporarily mounted read/write by user1 while doing the backup.user1 is an unprivileged user. I've read that the user option will let any user mount the file-system (and only that user can then subsequently unmount it) and that the users option allows any user to mount or unmount the file-system.I also found this in mount's man pageQuote:The owner option is similar to the user option, with the restriction that the user must be the owner of the special file. This may be useful e.g. for /dev/fd if a login script makes the console user owner of this device. The group option is similar, with the restriction that the user must be member of the group of the special file.So it looks like I'd need a login script for that user to make the user owner of the device file (/dev/voiceserv/backup in this case)
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Oct 1, 2009
I'm trying to configure our mail server to block email from a specific sender reaching a specific recipient. In other words, if one of our employees is getting harassed by a 'stalker', how would one go about blocking, at the MTA (Sendmail) level, a specific sender email address from reaching a particular users inbox? We do not want to capture the email - simply block it before it consumes server resources.The Sendmail server (MTA) is a front end to our Exchange server so no user accounts exist on the Linux server. We simply use it as a SPAM and Virus scanner then forward clean email to the Exchange server.
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Jul 19, 2010
I want to replace specific character in a file after every specific line. example as follows.
O 000000000000000000
A 111111111111111111
C 222222222222222222
[code]...
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Sep 8, 2011
I have an old notebook on which I would like to install Fedora 15. Because the normal requirements of Fedora 15 are prety high I would like to install the command-line version (so without GNOME/KDE). I was wondering what the requirements of the command-line only version would be. Would it run on a 650MHZ PIII, 128mb RAM system? If so how do I install a command-line only version?
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