haproxy | HAProxy related stuff : scripts configs | Proxy library

I would like to print some log messages from the external check script of HAPROXY to rsyslog. For now, I use “echo” in my external-check.sh script but it does not show up the echo messages. It only shows the haproxy log messages. Is that possible?

The content of haproxy.cfg:

We have deployed a django server (nginx/gunicorn/django) but to scale the server there are multiple instances of same django application running.

Here is the diagram (architecture):

Each blue rectangle is a Virtual Machine.

HAProxy sends all request to example.com/admin to Server 3.other requests are divided between Server 1 and Server 2.(load balance).

Old Problem:

Each machine has a media folder and when admin Uploads something the uploaded media is only on Server 3. (normal users can't upload anything)

We solved this by sending all requests to example.com/media/* to Server 3 and nginx from Server3 serves all static files and media.

Problem right now

We are also using sorl-thumbnail.

When a requests comes for example.com/,sorl-thumbnail tries to access the media file but it doesn't exist on this machine because it's on Server3.

So now all requests to that machine(server 1 or 2) get 404 for that media file.

One solution that comes to mind is to make a shared partition between all 3 machines and use it as media. Another solution is to sync all media folders after each upload but this solution has problem and that is we have almost 2000 requests per second and sometimes sync might not be fast enough and sorl-thumbnail creates the database record of empty file and 404 happens.

Thanks in advance and sorry for long question.

I managed to install kubernetes 1.22, longhorn, kiali, prometheus and istio 1.12 (profile=minimal) on a dedicated server at a hosting provider (hetzner).

I then went on to test httpbin with an istio ingress gateway from the istio tutorial. I had some problems making this accessible from the internet (I setup HAProxy to forward local port 80 to the dynamic port that was assigned in kubernetes, so port 31701/TCP in my case)

How can I make kubernetes directly available on bare metal interface port 80 (and 443).

I thought I found the solution with metallb but I cannot make that work so I think it's not intended for that use case. (I tried to set EXTERNAL-IP to the IP of the bare metal interface but that doesn't seem to work)

My HAProxy setup is not working right now for my SSL traffic (with cert-manager on kubernetes) but before I continue looking into that I want to make sure. Is this really how you are suppose to route traffic into kubernetes with an istio gateway configuration on bare metal?

I came across this but I don't have an external Load Balancer nor does my hosting provider provide one for me to use.

I have a haproxy as a load balancer running in k8s with a route to a service with two running pods. I want the server naming inside haproxy to correspond to the pod names behind my service. If I'm not mistaken the following configmap / annotation value should do exactly this: https://haproxy-ingress.github.io/docs/configuration/keys/#backend-server-naming. But for me it doesn't and for the life of me I can't find out why. The relevant parts of my configuration look like this:

controller deployment:

I am a newbie in software architecture and I have some question:

I don't understand which requests is sent to the HAProxy on this image.
I mean: if one "Application" Server (backend) want to save data in the Galera Cluster what is the request that will be sent to the HAProxy?
Is it an sql query "request"?
If it is an sql query should the HAProxy server needs a mysql-server to "handle" the connection?
Should Application Server needs to be configured to make an sql connection to the HAProxy?

from: https://fromdual.com/making-haproxy-high-available-for-mysql-galera-cluster

Thanks!

I have installed ingress controller via helm as a daemonset. I have configured the ingress as follows:

I would like to deploy an ngingx-ingress controller on my self-hosted Kubernetes (microk8s) that is configurable to listen on one or more interfaces (external IPs).

Not even sure if that is easily possible and I should just switch to an external solution, such as HAProxy or an nginx.

Required behavior:

Currently I have a system where I have installed HAProxy on one machine and my other 3 machines serves the webapps and the fourth machine for the database. Now I need to add another load balancer in my system so that any one of the load balancer could pick the request and process it.

But I don't understand how exactly are we going to configure a second load balancer if my domain say example.com is pointing to the IP address which is the load balancer currently. When I add a second load balancer

1. Will there be any third machine where something needs to be installed so that it can redirect the request to one of my load balancer? Again if this is so, it again is a single point of failure and creates a bottle neck.

2. If at all I am going to have 2 machines running load balancers then how exactly is the request going to come in because both machines will anyway have different IP.

Does someone have clear instructions for upgrading HAProxy to the latest stable release?

We're presently using 1.8.19 on a Debian VM and need to upgrade it to 2.1.3.

I came across the following instructions: https://blog.geralexgr.com/linux/upgrade-haproxy-to-2-1-3-red-hat-enterprise-linux-server-centos

However, they really aren't clear for someone who's never done this before. I don't want to be compiling source code unless I absolutely have to.

Running apt-get install haproxy says I'm on the latest version. Why then do I see 2.1.3 as the latest stable release?

Any help would be appreciated, as always!