Questions tagged [load-balancing]

Load balancing deal with the techniques involved on using multiple systems to deal with high demands, balancing the load between those multiple systems. Questions deal with networking and server load balancing, using dedicated hardware or not.

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12 views

Why AWS NLB doesn't need pre-warming?

I learned that AWS NLB doesn't require pre-warming whereas CLB and ELB need. NLB is designed to handle tens of millions of requests per second while maintaining high throughput at ultra-low ...
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40 views

Cant access kubernetes service from another machine

My goal is to access a certain kubernetes service deployed on my machine (cluster) from a machine outside the cluster (another machine). I am exposing these services using "Ingress" objects. I have a ...
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nginx - reverse proxy, ssl, and load balance same connection?

Application we use has an extended path that we would want shortened to just one subfolder. The method to do this was to use nginx. Along with this was to have the SSL terminated on the proxy server ...
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Load balancer unable to switch to backup server in case of a 502 and a specific error

I'm still geting this error: [Sun May 31 07:44:00.903056 2020] [proxy_http:error] [pid 31:tid 140012797242144] (70007)The timeout specified has expired: [client 185.19.0.158:58628] AH01102: error ...
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2answers
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Can a server behind a load balancer get responses to its requests? [closed]

Assume there are two servers A, B that are behind a load balancer, for example, they could be two docker containers. If server A makes an HTTP GET request to some-site.com, it is possible that the ...
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2answers
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Httpd server optimization for 50-100k users

I currently have an AWS EC2 instance m5.24xlarge that has : 96 vCPU 384 RAM 25 GBPs network We are currently expecting more than 50 000 concurrent users online, I have added a layer on cloudflare ...
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1answer
13 views

Unknown directive “hash” for nginx while using with $remote_addr

I have using ip_hash in nginx conf file but found the requests were always redirected to same server address. Found that using $remote_addr should help to resolve this but nginx gives error 2020/05/...
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14 views

Load Balancer Route 53 SSL Connection Refused?

As of now the propagation is done already How did I checked it? ping <public-ip-of-instance> I tried to check my domain using HTTP Request and it works fine. The site loading fine on port 80 ...
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Route traffic from certain site/url to a number of hand-picked nodes in a load balanced environment

I inherited a loadbalancer (mod_proxy) setup consisting of 5 nodes. The setup serves a number of 6 sites (site1, site2 etc, with shared disk space) and would like to know if there is a way to route ...
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61 views

GCP Network Load Blancing with internal IP Backend-Services

I try to configure an external TCP LB and 3 backend instances which have not any external IPs. I'd like to use only the LB external IP and reach the instances. After terminating the configuration ...
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Ruoter Load Balancer blocks streaming only for TV [closed]

In my home, I have 2 ADSL lines (both very low performing); I have had to opt for this quite expensive mean due to limitations in a single line for what I, and my family, have to do (specially now ...
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1answer
66 views

Different server of subdomain(HostMonster) & domain (AWS)?

So I have these 2 different endpoints blog.subdomain.com - The wordpress files of this located on my hosting (HostMonster) domain.com - This was a parked domain, but recently tried to use AWS to ...
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1answer
142 views

Is Domain A Record pointing to Elastic IP prone to Attackers?

Currently I have working fine ec2 instance and the DNS A Record is pointed to my elastic ip Is it risky to point it on elastic ip? or should I point my DNS A record to my load balancer link?
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Apply SSL on Elastic IP without propagation?

So my boss, said "I don't know, what company you were working for before. But DNS settings doesn't take 24 hours to take effect since when I started this company. " I'm having a doubt with myself if ...
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425 Security: Bad IP connecting when trying to connect to ftp server behind load balancer

I have an ec2 instance with vsftp installed. The daemon is listening on port 21: $ sudo netstat -tulpn tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN 1730/vsftpd I ...
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nginx configuration works over curl, but not in browser?

I have an nginx configuration resembling something like this: # mysite.com nginx config server { listen 80 default_server; listen [::]:80 default_server; root /usr/share/...
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504 Gateway? Load Balancer & Backend

Currently I'm having a lot of problem with my aws instances from different accounts Used the following services of AWS EC2 Instance Load Balancer & SSL Certificate Route S3 The sites are ...
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1answer
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Transparent TCP load balancing with NGINX/HAproxy

I have been trying for some days and still have no luck with getting transparent TCP load balancer to work using HAproxy/NGINX. The problem is: everything works correctly, until i try to enable ...
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cross-region load balancing: how to run two haproxies and serve geographically close clients

I may be phrasing this question incorrectly, so please feel free to suggest changes to the question if necessary. I run a web service. For both reliability and horizontal scaling, the front-end is ...
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Latency introduced when reloading HAProxy every 15 seconds

We have a use case in which we need to reload HAP every 15 seconds. For every reload, the latency shoots up to 12ms. Normal latency is 7ms at 32k req/s. Below is what I have tried - On the same host,...
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Postfix: Using sender dependent transport maps for redundancy and load balancing

I have a Postfix server and I'm trying to use two different IPs in two different connections / ISPs to send email. The address 89.xxx.xxx.2 is the default system gateway at eth0 AND 188.xxx.xxx.2 is ...
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DNS in HA with Nginx & iptables

I have two DNS servers dns1 & dns2 and I want to do failover load balancing between the two. I'm using Nginx as load balancer to dispatch DNS request to the authority servers. Clients --> ...
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AWS ALB connections are timing out

I'm trying to set up a simple AWS application load balancer instance with a listener that (for now) returns a fixed 200 response. At present all calls to the load balancer are timing out. Reading ...
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1answer
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Load Balancer & Route 53 : DNS address could not be found | AWS & BlueHost

Hello I just wanna ask Currently I have created a load balancer and route 53 In my route 53 I have these records Now I have these name servers registered on my BlueHost (Mydomain provider) ...
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1answer
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Will ingress traffic to a global service always be handled locally on that node?

Assuming you run a service exposed on port 80 in global mode, will ingress traffic on port 80 for any given node / host then be handled locally by the instance running on that node? The alternative ...
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1answer
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AWS ELB Route 53 to my bluehost domain?

Currently I'm trying to put SSL on my EC2 Instance using Load balancer & Route 53 for my BlueHost Domain As of now I have working Load balancer https://adthrone-loadbalancer-1188159040.us-west-2....
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1answer
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What's the rationale behind using reverse-proxy in front of an application server?

Why do application server documentations always recommend using a reverse-proxy like Nginx? Take a random app server like Gunicorn or a built in server for NPM, what's the rationale behind using Nginx ...
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Webserver client certificate request is not presented by the browser through Nginx load balancer

I'm deploying a load balancer with nginx and have a problem with client authentication. This load balancer redirect traffic to two apache webservers. The webservers ask for a client certificate when ...
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External Traefik services access docker swarm network

I am running a traefik service with systemd and using the file provider to load balancing to a Ceph rados gateway cluster, and a few other services. I have traefik installed on 3 servers this way with ...
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29 views

Mixed content error with SSL offloading on Nginx load balancer

I am configuring Nginx load balancer in front of two servers with litespeed as web server. The web application is wordpress and there is a SSL certificate on the load balancer node and none on web ...
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4answers
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How to do this load-balacing properly?

Let's say I rent 6 dedicated servers by a server provider for my website http://example.com: #1: 203.2.113.1 #2: 203.2.113.2 #3: 203.2.113.3 ... #6: 203.2.113.6 each of them having a maximum upload ...
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2answers
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Does load balancing increase bandwidth?

Say that i have a server that has 1Gbit bandwidth and i serve static files.Does adding another identical server and using a load balancer(running on the first server perhaps)double the bandwidth?Or ...
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Route Domain to two IP's

I am looking to route domain.com to one X.X.X.1 and domain.com/blog to X.X.X.2. Is there a way this can be accomplished? if so how would one accomplish it? Can a DNS accomplish this or do I need a ...
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AWS ECS: Looking for guidance for architectural approach, container networking

I'm trying to to figure out the best approach to deploying a docker based application in ECS. I've attempted to sketch out the general topography below. And below is my docker compose file: ...
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1answer
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How do I access my website created through route53 with an elastic load balancer?

I've just registered my website kashpress20.com (a wordpress website) created created via instances,etc. I put my instances behind an Elastic Load Balancer. The ELB's DNS name works just fine. ...
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38 views

Load splitting. Send duplicate packets to two or more servers behind a load balancer

Is there such a thing as a load splitter instead of a load balancer? I would like for traffic that hits my load balancer to go to 2 of my real servers. Can HA proxy be configured to do this?
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1answer
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GCP HTTPS LB health check is working but no real traffic getting in, what could explain this?

If the health check is working and the backend service is marked as green (i.e. I do have a firewall rule for the LB hc/traffic), would could explain that no real traffic can get in (I'm getting a 502 ...
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1answer
96 views

GCP Layer3 Load balancer

I'm looking for a way to load balance (LB) layer3 network traffic with GCP. Off the shelf GCP load blancers support only down to layer4 (TCP/UDP). I would like to find the most GCP native solution for ...
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3answers
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nginx load-balancing and reverse-proxy multiports : 502 Bad Gateway

I used two Icecast servers which host many webradios streams. Each stream use a port between 8000 and 9000. I use nginx (1.16.1 on Debian 10) to : easily allow HTTPS for all streams automatically ...
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why would you use both a reverse proxy and a load balancer when you can just load balance with a reverse proxy?

I read that one of the uses of a proxy server is to load balance with it. But, I also read that google uses both a load balancer and a reverse proxy. I am trying to understand what the use of a load ...
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28 views

Is IPVS/keepalived as sole load-balancer with persistence a viable alternative to HAProxy sticky sessions?

for a tomcat application I need a simple and resource-effective load-balancing solution. While mod_proxy/mod_jk/HAProxy seem to be among the standard solutions for tomcat, I have discovered that IPVS ...
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1answer
44 views

How do load balancers actually work on the socket/tcp level? [closed]

I can't find information about this and everything I found is related to algorithms, healthy instances, etc, etc. all high level details.. When a load balancer receives a request, does it simply ...
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42 views

Can a nginx load balancer or nginx reverse proxy server have front end and back end before communicating with the upstream servers?

So I was wondering, is it possible to make a simple page on the balancer server with a button "continue" and if the user clicks it to get the response of the server which was chosen by the balancer? ...
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Nginx Load Balancer traffic redirection

we have following nginx config : nginx config snippet In the ../conf.d/ folder we have different config files for domains and subdomains. Let's say aaa.conf, bbb.conf, ccc.conf. Nothing unusual in ...
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4answers
211 views

any reason to not use nginx (free) to load balance Exchange 2019?

I've prototyped load balancing my Exchange 2019 mailbox servers (2 servers in a DAG) using nginx free edition using the streams capability. I am aware that this is only a Layer 4 solution, and hence ...
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NGINX load balancing adjust proxy_pass URL based on the upstream server

I have basic nginx load-balancing setup in place, e.g. http { ... ## some stuff, log formats, etc. upstream backend { server localhost:8001 server localhost:8002 } server { listen ...
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30 views

GKE: Switch from TCP to Ingress Load Balancer in prod

We have several deployments running in Google Kubernetes. Most of them are web services set up with the default configuration, so they have a public IPv4 address which is served by a TCP load balancer....
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1answer
52 views

Azure Virtual machine scale set and .NET Core application

I am experimenting with Azure Virtual machine scale sets in order to achieve load balancing of the .NET Core application. Configuring actual scale set seems straightforward. Now, it comes with the ...
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1answer
38 views

Reengineer a Glassfish Cluster to be used with AWS Auto Scaling and ELB [closed]

I am in my learning path for the AWS Solution Architect exam. Please consider this question under this point of view, an auto assignment :-) As an exercise for the reliability pillar I am trying to ...
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1answer
18 views

Setting nice value of all user processes in realtime based on his CPU usage

In order to balance users CPU consumption on a shared computing server, I would think it very useful if one could: set the nice level for all processes of a user furthermore, adapt this level in ...

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