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Questions tagged [round-robin]

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13
votes
2answers
21k views

Is it possible to have round-robin DNS with /etc/hosts file?

Is it possible to have round-robin DNS with the follwing configuration in /etc/hosts? 192.168.4.10 shaakunthala.local 192.168.4.20 shaakunthala.local I'm on Linux.
12
votes
5answers
10k views

DNS Round Robin: Do browsers stick to one IP as long as it is online?

How do most browsers behave if they get multiple A-records from the DNS server? Do the stick to one IP as long as it is reachable (and only use another if the IP is down)? Or do they switch all the ...
9
votes
5answers
5k views

Weighted round robins via TTL - possible?

I currently use DNS round robin for load balancing, which works great. The records look like this (I have a TTL of 120 seconds) ;; ANSWER SECTION: orion.2x.to. 116 IN A 80.237.201.41 orion....
8
votes
3answers
9k views

Is round-robin DNS a possible solution for high availability?

Let's say I have 2 IPs for a given domain (round-robin DNS). If one the IPs becomes unresponsive, will clients try to connect to the other IP? or they will just fail to establish comunication with the ...
8
votes
2answers
8k views

Load Balancing Best Practices for Persistence

We run a web application serving up web APIs for an increasing number of clients. To start, the clients were generally home, office, or other wireless networks submitting chunked http uploads to our ...
5
votes
2answers
24k views

HAProxy with SSL and sticky sessions

We're trying to set up HAProxy (v1.5.1) to use SSL. While we managed to do that, we're having some issues with the round robin settings: We do want to have stick sessions, but haproxy seems to send ...
4
votes
2answers
3k views

Load balancing / Failover for multiple VPS's set across different datacenters

I know many variants of this question has been asked already, but I still can't find a good answer to my needs. What I want to do is setup a few (2 at minimum) VPS's to host my web apps on. I'd like ...
3
votes
2answers
1k views

DNS Round-robin, Load Balancing, Load sharing, and failover in 2012

I have been reading many posts on serverfault as well as on other sites regarding all these. What I understand is, Multiple A records(round-robin dns) can be used for both : Load sharing (round-...
3
votes
2answers
2k views

DNS Round-robin does not load balance SSH

I tested DNS round-robin with SSH, and I noticed amazing results of the SSH client on my testing environment. I am using 3 nodes with RHEL 6.2 (openssh-5.3p1, bind-9.7.3-8.P3). Things like the host ...
3
votes
4answers
394 views

Looking for a loadbalancer [closed]

I am looking for an open source loadbalancer for linux. My requirements are simple. I want One load balancer infront of multiple webservers. It should be able to split the load evenly among the ...
2
votes
3answers
1k views

DNS Round Robin only if one goes down?

I've got two servers, equal capabilities in terms of processing power and load. What I am trying to accomplish is this: (I already own and run DNS servers so this shoudln't be a problem). Server A ...
2
votes
2answers
773 views

Does my BIND zone really provide redundancy and load balancing?

We have the following IP addresses (for example): 1.1.1.1 2.2.2.2 Each hosts the same website, but on a different server. We want to do some really simple load balancing by having web users visit a ...
2
votes
2answers
410 views

Network bonding modi balance-rr / 802.3ad layer3+4

What is the difference between balance-rr and 802.3ad with xmit_hash_policy set to layer3+4 https://www.kernel.org/doc/Documentation/networking/bonding.txt This algorithm is not fully 802.3ad ...
2
votes
2answers
4k views

PowerDNS CNAME with multiple A records produces unexpected results

This problem from what i can tell is isolated to PowerDNS. The servers are running two packages pdns-static-3.0.1-1.i386.rpm and pdns-recursor-3.3-1.i386.rpm on the most recent version of Amazon Linux....
2
votes
1answer
226 views

Run different instances behind one load balancer?

When using Amazon AWS is it possible to run different types of instances behind an load balancer? Let's say as base instance you have an t2.small and when having some more load you want an t2.micro ...
2
votes
1answer
489 views

bind zone file setup for dns round robin

I would like to set up load balancing for my website using DNS round robin. My DNS is managed by my own CentOS 6 server running bind. I added the following into my zone file: @ ...
2
votes
1answer
356 views

Best practice to connect to Citrix XenApp

What is best practice to connect to your Citrix XenApp servers? Putting the addresses of all servers in a client, or putting one dns entry with multiple a-records?
2
votes
1answer
1k views

Squid cache_peer round-robin algorithm not working as expected

I have number of peer-to-peer HTTP proxies and I need to distribute my requests among them evenly, so I added multiple cache_peer directives and set round-robin as peer selection algorithm. This is my ...
2
votes
0answers
2k views

Varnish 3.0.5 round robin director not balancing

I have an architecture with two varnish servers sitting in front of 5 webheads. Each varnish server is configured with a round robin backend director, but at times of moderate to high load varnish ...
2
votes
0answers
126 views

Load balancing inconsistencies & AD server causing network crawl

We've configured a TS load balancing farm consisting of the Active Directory server which acts as the TS Broker and 6 Terminal Servers who are members of the farm. The load balancing is set to basic ...
2
votes
0answers
1k views

How does Round robin policy of MPIO work in Windows 2008 R2

I have a Dell server with a 1G dual port iSCSI adapter. I have installed the NIC driver and using Microsoft iSCSI initiator, map few luns to both the ports and enable MPIO. The target I used was ...
1
vote
1answer
77 views

Does anycast allow for alternate routes to be attempted?

A bit of a bodged up title but I don't know enough of the subject to come up with a more suitable one. I've read time and time again that anycast is a great solution for load balancing and is the ...
1
vote
2answers
215 views

Multiple DNS A records referencing the same host

If I create multiple DNS A records for the same hosts, for example: my-domain.com A 1.2.3.4 3600s my-domain.com A 4.5.6.7 3600s my-domain.com A 7.8.9.0 3600s Do queries really ...
1
vote
2answers
268 views

Can nmap scan/test all answers from round-robin dns?

I have a round-robin dns record I want to test with nmap, currently it only tries one of the IPs (if I run a loop it checks each in order). Is there a way to have nmap test all A/AAAA records from a ...
1
vote
1answer
118 views

Can I Repeat Records in DNS Load Balancing?

I would like to bring up the load on a new server slowly over time. Unfortunately there is no front-end load balancer we can use to adjust this, so I just insert a new DNS record for the domain name. ...
1
vote
1answer
533 views

Multi-level wildcard DNS matched by *.domain.com?

Q1: Does a DNS rule for *.domain.com match multi-level domain names? In other words, if I just set *.domain.com in my DNS records, will it match all of: a.domain.com b.a.domain.com c.b.a.domain.com ...
1
vote
1answer
117 views

Setup an intelligent Round-Robin strategy

According to a lot of research - I discovered the design pattern Round Robin. It basically solves the idea I want to adopt. I want to have a pool with physical servers, each their own IP address that ...
1
vote
1answer
138 views

Round Robin with single source

We have built ourselves an API and are busy scaling it. At current we have 6 hosts and we use DNS Round Robin to spread the load. However a lot of our traffic comes from single source. We plug into ...
1
vote
1answer
199 views

Can the DNRD master file contain multiple records for a name?

I am trying to get DNRD to serve certain records from the master file in a round robin manner. I have tried several combinations e.g.: 1.1.1.1 hostnameA 2.2.2.2 hostnameA 1.1.1.1 2.2.2.2 hostnameA ...
1
vote
0answers
174 views

Windows remote desktop session host high availability login

I had Windows Terminal Server (WS2012 Standard R2), where everything worked as expected. After this I installed 3 more servers and did high availability with 2 connection brokers and 2 session hosts ...
1
vote
0answers
322 views

DNS round-robin requests not distributed evenly

We have setup two DNS A records, where each points to a load balancer. nslookup ourdomain.com Server: 8.8.8.8 Address: 8.8.8.8#53 Non-authoritative answer: Name: ourdomain.com Address: 52....
1
vote
0answers
818 views

Can stunnel be used to round robin tcp connections without SSL?

Today, I'm already using stunnel to provide SSL termination to a set of TCP services where the connections are round-robin'ed, this is done, for example, like follows: [myserv] accept = 443 connect = ...
0
votes
4answers
2k views

Avoiding 502 Bad gateway in a round robin webserver process restart

I have a load balancer/reverse proxy (either nginx or cherokee, does not matter which) deployed on my server and it points to multiple background webserver processes (either gunicorn or cherrypy, does ...
0
votes
1answer
116 views

Is it possible to offer failover even using DNS round robin? [closed]

A company X has five ips to a given service. $ host www.example.com.br www.example.com.br has address 13.194.4.159 www.example.com.br has address 13.194.4.152 www.example.com.br has address 13.194.4....
0
votes
1answer
111 views

DNS Load Balance for Static Website

This is more of a educational question in comparison to a production environment. I have an AD environment with two IIS servers hosting the identical website content. For arguements sake lets say it ...
0
votes
4answers
181 views

How to setup a Route 53 DNS record in front of three other records?

I have a zone in Route 53; let's call it example.com. I have three A records in that zone: server1.example.com --> elastic_ip_1 server2.example.com --> elastic_ip_2 server3.example.com -->...
0
votes
1answer
65 views

Round-robin outgoing TCP requests between multiple Ethernet adapters on Windows

I have a Windows Server Standard with 3 Ethernet adapters. I am running a C# application that makes TCP connections to another server. Right now they are all made via the adapter that has a default ...
0
votes
2answers
106 views

pdns - using LUA records

Id very much like to do this but it doesn't seem to be enabled on my installation. # rpm -qa | grep pdns pdns-4.1.5-1pdns.el7.x86_64 pdns-recursor-4.1.7-1pdns.el7.x86_64 Ive tried both iterations in ...
0
votes
1answer
5k views

round robin dns in windows server not working

Running Windows 2012 R2 Round Round enabled for my DNS zone (AD integrated) Im either not understanding this or its not working. I want to use round robin dns to resolve to a cluster of servers. ...
0
votes
1answer
39 views

Issues to loadbalanced web servers in network when one fails

I have a network of one load balancer server (using nginx) lb1 which routes traffic between four web servers web1, web2, web3, web4. These four webservers are routed to using round-robin in nginx. ...
0
votes
1answer
818 views

How To Load Balancing on Bind9 Dns Server?

i have a DNS server running on ubuntu 14.04 - bind9 , because the server is hosted on t2 micro amazon free tier i don't think it can handle all requests that it will get , over 10000+ clients will use ...
0
votes
2answers
207 views

Using dual isp and static ip [closed]

what are the options to increase/backup bandwidth of a load balanced web farm gaining bandwidth from more isps? What are hardware/ip requirement to benefict from the 2 lines? http://s22.postimg.org/...
0
votes
1answer
977 views

Using Round Robin DNS on simple VPN setup

We have two internet connections which are load balanced to share the load between the two. We set this up after one of the internet provider proved to be less than reliable but great speed and ...
0
votes
1answer
1k views

2 MX dns round robin for with same domain name for Exchange 2010

I have an Exchange 2010 server that is visible under 2 MX records mx.acme.com and mx1.acme.com with 2 different IP addreses from 2 different network providers. They both report as mx.acme.com when ...
0
votes
1answer
15 views

Bonding SWITCH XS (incoming packets)

I would like to bound 2x10Gb/s of a Linux server to receive/inbound more than 10Gb/s on a virtual interface send by a unique client. The client will probably send more than 10Gb/s (probably bonded ...
0
votes
0answers
18 views

Direct requests only to one container of the docker swarm service

Is it possible to cause docker load balancer which uses round robin to direct requests only one container of global docker service deployed on multiple hosts? If this container goes down, requests ...
0
votes
1answer
75 views

NetScaler prioritizing faster hosts in round robin

For a NetScaler load balancer running SSL passthrough, is there any aspect to the round robin load balancing algorithm that would direct more traffic to hosts that respond more quickly? As a ...
0
votes
2answers
295 views

How does aws elastic route requests via round robin?

I am looking at graph which shows CPU load on EC2 instances. I spot that when for 1 EC2 CPU increases for 2 it decreases at same time. After some period (5 minutes) they changed that 1 decreases and 2 ...
0
votes
0answers
350 views

NFS mount via Round robin DNS only mounts from single system when using 10 Gb/s ethernet

We have a round-robin DNS setup that map the same name ("gsx") to six different IP addresses. This is verified as working from the client by using things such as 'nslookup' and 'ping'. However when ...
0
votes
1answer
400 views

Sharing connection status between multiple HAProxy

I need to upgrade our current infrastructure based on a single server to a multi server one. Basically we run an HTTP app, MySQL and other services. My idea is to put HAProxy on all the servers so ...