I'm working with IIS and ARR and the load balancing is working good ,but when a server fail the ARR still rout requests to this failed server.
How can i prevent router to pass request to the failed server without using NLB ?
You need to set up Health Test for your farm.
See Step 2 - Configure health check monitoring:
http://www.iis.net/learn/extensions/configuring-application-request-routing-(arr)/http-load-balancing-using-application-request-routing
Related
I have a nodejs web app with websocket , when i run on localhost it's not problem but when i run on public host (have SSL,domain name...) i get error : WebSocket connection to 'ws://127.0.0.1/ws' failed .
Question here is, where are you trying to connect from
Client OR Server
The error message would indicate you are trying to connect to a localhost, so if you are getting this message back from the client side, then its because your connecting to a non-reachable WS instance. Also, if you WS host is https, you would use WSS protocol vs just WS
As mentioned, without seeing the code its hard to tell
You need to setup your server environment, is your web-server (Apache, nginx) correctly pass requests from world to your node app?..
Is your server firewall pass WS connections?..
IMHO you need a consultation from your provider DevOp's support team.
You are using the following according to your statement:
ws://127.0.0.1/ws
From what I have read in the various ws api's while researching my own websocket issues I believe you would need to make the following change:
wss://127.0.0.1/ws
as wss is used for SSL connections.
I have installed ARR on my Windows 2019 server via the IIS Platform Installer and configured it by adding a server farm and adding a single server to it.
I can ping the server and ARR shows it is online. The issue is, when I submit a request from my local PC, it seems to hit the ARR server but it never hits the server farm. The browser returns 404 Not Found.
On the ARR server, if I create a request to "controlcenter.mydomain.com" and view the logs in C:\iislogs\www\HTTPERR I see this error:
2020-10-30 19:14:54 [my local computer IP address] 53391 [my ARR server IP address] 80 HTTP/1.1 GET / - 404 - NotFound -
The sites on my webfarm server are "controlcenter.mydomain.com" and "api.mydomain.com." Do I need to create special rewrite rules for these sub domains? I cannot seem to tell from the documentation.
How can I find out why the request is not being properly routed from the ARR server to the server I've added to my server farm (shown below)?
When I tried to reset runtime statistics on the Monitoring and Management page, it says, "The operation could not be completed because the worker process has stopped."
The health test with URL "http://controlcenter.mydomain.com" succeeds also.
Before you use ARR, you must first make sure to create a site bound to your domain, and then ARR can forward requests for that domain to the server farm.
In order to solve the problem of stopping the work process, there are the following methods.
Setting Ping Enabled to False stops IIS from checking whether the worker process is still running and keeps the worker process alive until you stop your debugged process. Setting Ping Maximum Response Time to a large value allows IIS to continue monitoring the worker process. You can refer to this document.
Run this command from the elevated command prompt on the controller machine.
net stop webfarmservice & cd /d "%programfiles%\iis\Microsoft Web Farm Framework" & mkdir extensions & move WFFExtension.dll extensions & net start webfarmservice
When I tested in my environment and killed the w3wp.exe, health test returned success but status of servers were unknow. This command solved the issue.
Delete the server farms and restart the IIS, then re-create server farms and add servers.
I have a nodejs app in a ubuntu server. i use plesk for server management.
I am using a url for catching requets from an external api. It sends a webhook to my url for catching information.
I see in my server log, 499 error when this url is requested.
I cannot find any nginx configuration for fixing this problem
Any ideas?
Kind regards
I had similar issues with NGINX recently.
The reason was server timeout - NGINX forwarded request to a backend service (Spring in my case), the backend service timed out.
In my case it was due to "out of memory" exc in Spring Boot app.
So, most probably it's an issue in your node service.
I have this IIS7.5 with ARR installed on and configured as a reverse proxy to another server which is running IIS7.
On this IIS7.5 I have ASP.NET 4 applications and simple websites installed.
Since configuring a farm on this IIS7.5 running it as a reversed proxy, the local application doesn't run with this error message:
502 - Web server received an invalid response while acting as a gateway or proxy server.
There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server.
Will it be possible to run both local application and routing (reverse proxy) on this IIS7.5 at the same time or should I give up and move the applications to other servers?
Application request routing operates as a server-wide URL-rewriter.
This means that it captures all traffic coming to a box.
You can still host an IIS website on the same box, but you need to make sure that ARR leaves the requests for this site alone.
I set this up so that the ARR rule, while still remaining a wildcard *, I make sure that part of the match conditions is for requests to my local site to be left alone.
There are a number of conditions you can use to create a does not match rule.
Ive used:
{HTTP_HOSTNAME} if you are just doing HTTP requests and just want certain domain names to be left alone.
{SERVER_PORT} if you're hosting an SSL site and are the only one on the box.
{LOCAL_ADDR} if your site sits on a dedicated IP address.
many more.... really you just need to set up rules that exclude your locally hosted website.
We have a load balanced website. It connects to 6 different servers. Is there any way (ping or otherwise) to determine from the client side, which server the load is being passed to by the load balancer?
You could set a cookie that contains this information.
After some research Ive realized that you can get some information like the web server IIS version etc by looking at the HTTP header response. But you cannot tell from the client end which server this response originated from. Long story short, what is behind the load balancer is opaque to the user at the client end.