Networking :: Use Round Robin DNS Service For Setting Up A High Availability Solution?
Nov 16, 2010we use round robin DNS service for setting up a high availability solution ? i want to know whether it will work.
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Networking :: Port Bonding Won't Use Active-backup Using Round-robin?
Dec 9, 2010I'm trying to configure my Red Hat server to use port bonding for two interfaces going to a switch, and I followed this redhat guide [URL]...-redhat-server but when I attempt to bring the bond up, it simply uses mode 0 (round robin) instead of mode 1, which I specifically configured in /etc/modprobe.conf by doing
Code:
options bond0 mode=1
Any ideas why the bond would continue to use round robin when I set it to active-backup?
Networking :: Failed Http And Telnet Connections To Dns Round Robin Servers
Dec 2, 2008So we have DNS round robin set up for 4 servers. If we ping dns name (basically an alias) server_connect it resolves with different IP address in round robin format. I.E. x.x.x.1 x.x.x.2 for the 4 different server IP addresses. When we do nslookup server_connect it will come back first time as server1_connect server2_connect through server4_connect so the server is able to resolve through ping and nslookup resolving the initial dns name (alias) to the dns name associated in the round robin. Problem is when we try to connect with http or telnet it comes back host unrecognized. I can put one of the 4 round robin servers in /etc/hosts and it connects fine so I'm thinking that either one of three things.
1) ttl
2) It does double connection first to identify itself to the round robin server and then handshake but second time it hits for the handshake the IP and dns name is different than what it expected so it fails.
3) Since we are trying to telnet to dns alias and it is returning different dns name it fails.
2 and 3 seem most promising but now I'm at a stand still.Anyone else come across this issue and if so how did you resolve.
General :: SSH In Round Robin Fashion?
Mar 24, 2011if i am having say 10 number of linux machine over the network and want to setup password free SSH in round robin fashion means ssh from any machine to either machine. one way to do is generate the public key on every machine and put on other machine. is there any other shorter and simple way to do it?
View 5 Replies View RelatedProgramming :: Scheduling Through Round Robin?
May 10, 2011Does anyone know how to run 2 threads with round robin scheduling. & can we get the time of these threads when they are context switching. That means I want to know at how much time each thread is taking to run
View 3 Replies View RelatedServer :: Round Robin / Exim4 / Mail Delivery SMTP?
Apr 30, 2011Here is the senario...
2 round robin dns servers
x.x.x.1 mydomain.com (hostname)
x.x.x.2 mydomain.com (hostname)
My problem is that when I try and send an email that is part of the domain, it ends up trying to deliver it locally. I realize it is supposed to, but I don't want that for non-users of the server.
I want to be able to deliver certain emails []@mydomain.com remotely. (info@mydomain.com)
exim4 setup "internet site; mail is sent and received directly using SMTP". This works well as long as it is not an email from mydomain.com.
Is there a way to have exim check the users first and then deliver based on local user or not?
Next question. Is having the domain name as the hostname the best way to setup a round robin? (web server)
Server :: How To Achieve High Availability Website?
Apr 7, 2011I have 2 web servers running apache hosted at 2 data centres on 2 different IP ranges.The 2 servers are an exact clone of each other hosting www.example.com.What I am trying to achieve automatic failover. Say my first data centre gets wiped out, how would customers reach my website on my second server in the second data centre by still typing www.example.com?The aim is for the customer not to notice any difference.
View 3 Replies View RelatedDebian Configuration :: Fault Tolerance / High Availability
Aug 19, 2015I work for a data center where we use a whole lot of VMware's "Fault Tolerant" Solution. As a personal project, I want to piece together an alternative solution out of open source software.
Here's my punchlist:
*Configure Debian (or build from scratch) to be as slimmed down as possible so that I may call it "Just Enough OS" or "baremetal"
*Install and configure Xen with XenMotion
*Prove that both the physical and virtual fail-overs work as intended
*Prove the automatic repair of failed virtual machines.
Server :: Concept Of Fail Over High Availability Mode
Jun 25, 2009Now that I have setup a proxy server, as a next step I want to run it in fail-over high availability mode, so that if one proxy is down due to any reason, second proxy should automatically be up and start serving requests.
View 3 Replies View RelatedRed Hat :: RHEL 6 High Availability Fencing Drack Not Working?
May 12, 2011I am setting up a high availabilty system on a RHEL 6 system.
I have configured 2 nodes.
dev0301
Eth0:
[code]...
CentOS 5 :: Create A High Availability Environment Between Two Machines?
Jul 9, 2009Is there a way to create a high availability environment between two CentOS machines? I don't mean just the HTTP service or just one other thing. I need the entire server synced in real time ready to take over if the next goes down.
View 3 Replies View RelatedCentOS 5 :: Configure An ISCSI / DRBD High-availability Cluster
Jul 23, 2010I'm trying to configure an ISCSI/DRBD high-availability cluster and I'd like to know what is the best option between OpenAIS and Heartbeat. I've seen they both are included in Centos Repos, yet OpenAIS requires installing 2 addition repos to install Pacemaker (EPEL and Clusterlab repos).
View 1 Replies View RelatedGeneral :: Enable High Availability Between Two Squid Proxy Servers Acting As One?
Sep 29, 2010I have setup proxy server as squid Now i would like to enable High Availability between two squid proxy servers acting as one.
View 6 Replies View RelatedServer :: High-Availability HTTP Load Balancer With HAProxy & Heartbeat On RHEL 5.4
Oct 15, 2010I am trying to setup a High-Availability HTTP Load Balancer With HAProxy & Heartbeat using the below links.
I have all RHEL 5.4 servers hosted on VMWare.
[url]
[url]
This is the scenario, as given in the links as wells as my setup.
Load Balancer 1
Load Balancer 2
Web Server 1
Web Server 2
I have followed all the steps mentioned in the links religiously except the 2.2 here, in which it is asking to configure the vhosts. I could not really understand , what is to be placed in /etc/httpd/conf.d/vhosts.conf file and in which Web Server.
Due to this step only, I think I am failing in Failover test given in Point 4.1 here. I am able to open the webpage by [url] which gives the content of Web Server 1 (http1.example.com). But, when I try to shutdown the http service (to check failover), it does not shows the contents of Web Server 2 (http2.example.com)
Although, I am able to succeed in Failover Test 4.2, in which shared IP 192.168.0.120 switches when I try to start/stop the any of the Load Balancers.
Server :: Build A Redundant, High-availability File Server System?
Mar 23, 2010I am kinda stuck while providing solution for the above problem. I have achieved the fail over using keepalived but not sure how can we replicate the data from one server to other seamlessly and have them in sync with each other. My prime requirement for this project is end user should not notice the fail over and replicated copy of data should be available on the secondary as well.
View 3 Replies View RelatedNetworking :: Best Way For Backing Up Availability Of Server?
Jun 2, 2010At my work, we have an ISP that provides us with 2 connections with different IP addresses but at the moment they don't switch automatically if one fails, and can only work for outbound traffic.I tried to automate this with floating routing table on a CISCO 1711 router but then switching to the second link only happens when there's no longer a signal on the cable that's plugged into the router's interface directly -- and the failure most often happens somewhere in the middle. And that also does not make us available from outside.
Can anyone suggest a better way? Maybe an outside DNS server can have a second IP address recorded for our domain name?I found somewhere suggestions that a loadbalancer could solve that but these appliances are way too expensive.I also thought about using BGP but my router's RAM (128MB) is too small for the global routing table that BGP requires. And I also need an ISP (or better 2 ISPs) that provide BGP service. Before trying to convince others that we need to invest more into this, I'd like to know whether there are no easier ways.
Networking :: HTTP Ping - Brief Textual Description / Round Trip Time
Jan 23, 2011Is there any tools in linux same as "http-ping. This tool shows for any request :
1-The HTTP return code (and its brief textual description)
2-The number of bytes returned by the server (excluding headers)
3-The time taken to complete the request (i.e. round-trip time)
Networking :: Find Availability Of Audio Streaming In Network?
Jan 10, 2010I want to know how to find if any audio streaming is available in eth LAN. ex: if a host is streaming mp3 audio through ethernet connected to my system how to find the availability of the network stream in eth any socket programming is needed
View 2 Replies View RelatedUbuntu Networking :: Script To Check Network Availability Before Mounting NFS
Mar 13, 2010I am trying to connect an NFS shared to my multimedia Box. I have no problem connecting it manually but when I tried to connect automatically upon booting up the multimedia I have to wait for the wireless to be connected before attempting to mount the NFS file system on the media box.Now I am sure that this can be easily implemented using a script however I do not have much experience with that. I am not sure about the syntax for the loop statement. I know what is required for the mount and other stuff. Is the use of the ping a good idea. It takes about 2 second for the ping to return when fails so after 40 to 60 sec it should stop.
View 2 Replies View RelatedRed Hat :: Setting Mailscanner Using Postfix Service?
Aug 27, 2010i already installed mailscanner and other component as well as. the problem is when i log to mailwatch gui, mailscanner and postfix status show no.--it's should be show yes ..
how to overcome that or enable that problem?
how to setting mailscanner using postfix should the mail will filter first before pass to mailserver.
anybody have configuration file that's work well on setting mailscanner using postfix?
Server :: Setting F13 With 389 Directory Service For Authentication
Jun 28, 2010I am setting up Fedora-13 with "389 directory server" for authentication. I had performed the following steps.
1. Install FD-13.
2. Yum install 389-ds.
3. Run script to configure.
4. Start 389-condole and create few group and user for testing.
I can see these user with "ldapsearch" and with "phpldapadmin". It looks my server is responding. However, I am unable to see any user name with "getent passwd". also "ssh server_user@server" is not able to login. Whereas "getent passwd" shows local user and "ssh local_user@server" is able to login. Also note that I am not using ssl, so want to avoid ssl.
Ubuntu Servers :: Setting Up A Load Balanced Service?
Jun 29, 2011Im used to Win Server so Im not very familiar with ubuntu server, I want to setup a load balanced service I have three server , one as a load balancer and the other two as my web servers, now my questions is that what are the steps I need to do to setup my cluster, I dont mean the requirements, not the actual detailed configuration.
Im gonna have my Mail server on these servers, how am I gonna setup the mail server to work with the load balancer, I mean is it possible to load balance the mail server like web server on ubuntu?
CentOS 5 Server :: Setting Up A Java App As A Deamon/service?
Dec 8, 2009There is a particular java app called LanguageTool which we need to host on our centos server. Other applications are supposed to send an http request to this machine; this machine should pass this data (received over the http request) to the java application concerned, obtain the output from the app; and then send this response back to the requesting client...
We need to set this app as a service on startup. The centos machine might restarted from time to time; so we expect this service should startup automatically. What can I do to get this done?
OpenSUSE Hardware :: Modem Configuration Without Setting A Service Provider?
Oct 20, 2010How do I configure my modem without setting a service provider? When I try to configure my modem I can't get past the page for setting my internet provider. I have DSL and only use a modem for faxing. I'm running SUSE 11.3 32bit with KDE 4.5.2 and the modem is a BCM4212.
View 4 Replies View RelatedFedora :: 15 Service Configuration App - Enable / Disable At Startup Setting Is Greyed Out
Jun 25, 2011When installing Samba and Webmin I use the application "system-config-services" or (if it is easier to find for you that way) menu->Administration->Service management. In this application I can start the services I need (nmb, smb, webmin), but the enable/disable at startup setting is greyed out... Even when I start the application as root it still gives me no possibility to configure the services to start up on boot. This should be possible. It works this way in Fedora 13 and Fedora 14, so why not in Fedora 15?
Before reporting a bug, I would like to ask if other users here have the same problem (and -if possible- a solution)... In the mean tim I guess it is back to the old way of configurating services - sigh..
[edit] I tried to remove the [SOLVED] from the title, but the forum software does not seems to allow me to do that... I thought it was solved by installing xinetd, but I was happy a bit too early. I still have no answer for this problem.
Ubuntu Servers :: Setting Up DynDns + Free DNS Service For Hosting Locally
Jun 24, 2011I have an Ubuntu Server, a dyndns account and an account with [URL]. My DynDns stuff is all working just great - novo.dyndns.tv is the address. Now I need a domain which I have already bought, to be linked to that machine at [URL] I signed up with freedns.afraid.org and now I am a bit confused at what records to add where. I added a domain - [URL] then setup a webforward as follows: redirect from [URL] and redirect from[URL] to [URL] , however if you go and visit:[URL] you will see my problem! It takes you back to [URL] server and says there is not a webforward setup for [URL]This tells us that the nameservers are all setup fine - and its something in my freedns config which is failing.
View 4 Replies View RelatedUbuntu :: How To Check Last Round Of Updates
Jan 20, 2011The last round of updates to 10.04 changed the initrd image, which I wasn't expecting. How do I check the updates to make sure that this is in fact the expected behavior? I.e., how do I go back and check which updates were supposed to have been installed, check what was actually installed, and see which one modified the initrd and why?
View 4 Replies View RelatedUbuntu :: Installation Cannot Continue / Go Round It?
Feb 23, 2011I have been trying to install on my toshiba satellite c655 laptop the ubuntu operating system. Anytime it gets to where i can use it as a live DVD and I would want to install, it gets to stage 3 of 7 and gets stuck. No error messages are given, the install dialog can be minimized and other task done but the installation will never continue. Anyone with idea about how to go round it.
View 3 Replies View RelatedGeneral :: Round Disk Space With Awk?
Jun 2, 2011I want to use awk to list all the mount points, disk size and space available. Now I have all that info but I want to round the totals, so there is no delimiters, how can I do that?
PHP Code:
#!/bin/sh
date
df=`df -Pl | grep "^/dev" | awk '{print $6, $2/1024 , $4/1024}' | sed "s/%//"`
echo "$df"
[Code]...
OpenSUSE Install :: Can't Open Debian's HDD And Other Way Round
Aug 8, 2010I have a dualboot system with Debian, how can I make both systems read and write ALL files on the computer?openSUSE can't open the Debian's HDD and the other way round.. how can I change that?
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