I am trying to configure HAProxy on OpenShift to achieve following URL based routing.
when I am trying to restart my app, I am getting following error in HAProxy log
Starting frontend http-in: cannot bind socket
Following are the changes I made to haproxy.cfg, in addition I have also added "user nobody" to global section. What am I doing wrong? I am new to HAProxy, so I believe it might be very basic thing I am missing.
frontend http-in
bind :80
acl is_blog url_beg /blog
use_backend blog_gear if is_blog
default_backend website_gear
backend blog_gear
mode http
balance roundrobin
option httpchk
option forwardfor
server WEB1 nodejs-realspace.rhcloud.com weight 1 maxconn 512 check
backend website_gear
mode http
balance roundrobin
option httpchk
option forwardfor
server WEB2 website-realspace.rhcloud.com weight 1 maxconn 512 check
To note a few problems with your configuration.
The first problem in your configuration is that you should listen on port 8080.
Ports 80, 443, 8000 an 8443 on the outside will be redirected to port 8080 on your gear.
Second website-realspace.rhcloud.com is probably the external name of your gear that also hosts your HAProxy. This means that you have created a loop.
To acces your nodejs app you'll need to use the 127.a.b.c address assigned to your gear.
Also your nodejs app should most likely cannot listen on the same port as your HAProxy.
Related
Hi :) I have problem with HAProxy configuration. I have haproxy and two backend servers (backend servers listen on 1234 port)
It's my haproxu config:
frontend http_front
bind *:80
backend http_back
balance roundrobin
server server1 10.0.0.2:1234
server server2 10.0.0.3:1234
This config doesn't work, but when i add to frontend:
bind *:1234
It works great - i don't understand it because bind *:1234 inform only haproxy to listen on 1234 port nothing more. Have you any advices or explanations ?
Port 80 is a privileged port, this means that you can only start haproxy as root when you want that haproxy should listen on port 80.
Another reason could be that there is another server listen on port 80. Maybe a web server run also on this machine which listens on port 80.
I'm trying to use nginx to setup a simple node.js server, I'm running the server in background on port 4000, my nginx config file is
server {
listen 80;
listen [::]:80;
server_name 52.53.196.173;
location / {
include /etc/nginx/proxy_params;
proxy_pass http://127.0.0.1:4000;
}
}
I saved it in /etc/nginx/sites-available and also symlinked it to sites-enabled, the nginx.conf file has the include line already to load files from sites-enabled, then i restarted the service using
sudo service nginx restart
I tried going to 52.53.196.173 and it refuses to connect, however going to 52.53.196.173:4000 with port 4000 it is working, but I'm trying to make it listen on port 80 with nginx, i tried putting my .ml domain as server_name and no luck, and i have the IP 52.53.196.173 as the A record in the domain dns settings, and I'm doing this on an AWS EC2 Instance Ubuntu Server 16.04, i even tried the full ec2 public dns url no luck, any ideas?
Edit: I solved it by moving the file directly in sites-enabled instead of a symlink
There is few possible things. First of all you need to verify that nginx server is running & listening on port 80. you can check the listening ports using the following command.
netstat -tunlp
Then you need to check your server firewall & also the selinux policies. ( OR disable selinux for test )
Then you need to verify that AWS security group configured to access the http/https connections on port 80.
PS : Outputs from the following command & configurations will be helpful for troubleshooting.
netstat -tunlp
sestatus
iptables -L
* AWS Security Group Rules
* Nginx configurations ( including main configuration if changed )
P.S : OP fixed the problem by moving the config file directly into site-enabled directory. maybe, reefer the comments for more info if you are having the same issue.
Most probably port 80 might not be open in your security group or nginx is not running to accept the connections. Please post the nginx status and check the security group
check belows:
in security group, add Http (80) and Https (443) in inbound section with 0.0.0.0 ip as follow:
for 80 :
for 443 :
in Network ACL, allow inbound on http and https. outbound set custom TCP role as follow:
inbound roles:
outbound roles:
assign a elastic ip on ec2 instance, listen to this ip for public.
I've got a server setup in NodeJS which looks like the picture below:
Now what i want to do two things which seem to be possible with HAProxy:
To only use one port no matter what server a client wants to access. I want to use the external port 8080 for all non SSL
traffic. (All SSL traffic should use the port 443)
Enable SSL on the SockJS Server and the Express Server.
Please not that all my servers are running on the same instance on an amazon ec2. So i want to internally route the traffic.
This is my haproxy.cfg so far:
mode http
# Set timeouts to your needs
timeout client 10s
timeout connect 10s
timeout server 10s
frontend all 0.0.0.0:8080
mode http
timeout client 120s
option forwardfor
# Fake connection:close, required in this setup.
option http-server-close
option http-pretend-keepalive
acl is_sockjs path_beg /echo /broadcast /close
acl is_stats path_beg /stats
use_backend sockjs if is_sockjs
use_backend stats if is_stats
default_backend express
backend sockjs
# Load-balance according to hash created from first two
# directories in url path. For example requests going to /1/
# should be handled by single server (assuming resource prefix is
# one-level deep, like "/echo").
balance uri depth 2
timeout server 120s
server srv_sockjs1 127.0.0.1:8081
backend express
balance roundrobin
server srv_static 127.0.0.1:8008
backend stats
stats uri /stats
stats enable
Cant figure out how to route the SSL and the traffic to the TCP Server (8080 internal port)
Any ideas?
Your setup is kinda hard to understand (for me). If I understand your goals correctly, you want to serve your web service through SSL hence port 443. And from 443, connect to port 8080 (internally). If that is the case then the following configuration might be what you are looking for. It does not really use port 8080 but instead it connects directly to your express backend. You don't really need to have port 8080 exposed (unless you have special reasons for doing so) because you can just use the backend servers directly inside the frontend section.
Note that this only works for HAProxy 1.5+, if you are using older version of HAProxy, you should put something to tunnel the SSL connection before it reaches HAProxy (But I strongly suggest 1.5 because it makes your setup less complex)
frontend ssl
bind *:443 ssl crt /path/to/cert.pem ca-file /path/to/cert.pem
timeout client 120s
option forwardfor
# Fake connection:close, required in this setup.
option http-server-close
option http-pretend-keepalive
acl is_sockjs path_beg /echo /broadcast /close
acl is_stats path_beg /stats
use_backend sockjs if is_sockjs
use_backend stats if is_stats
default_backend express
I'm currently using node spdy to serve files. This works beautifully.
However I would like to use HAproxy to load balance amongst these node servers. But when my node/spdy server is behind HAproxy, request.isSpdy is false... so spdy is all of a sudden not supported?
Here's my HAproxy configuration:
global
maxconn 4096
defaults
timeout connect 5000ms
timeout client 50000ms
timeout server 50000ms
frontend http_proxy
mode http
bind *:80
redirect prefix https://awesome.com code 301
frontend https_proxy
mode tcp
bind *:443
default_backend webservers
backend webservers
balance source
server server1 127.0.0.1:10443 maxconn 4096
# server server2 127.0.0.1:10444 maxconn 4096
Thanks!
You can't use HAProxy's HTTP load balancing mechanism with SPDY. First, you need to use the latest development branch to enable support for NPN (and hence SPDY), and after that, you will have to configure it to run closer to simple TCP load-balancing mode -- HAProxy does not understand SPDY.
For an example HAProxy + SPDY config script, see here:
http://www.igvita.com/2012/10/31/simple-spdy-and-npn-negotiation-with-haproxy/
I ran into this same issue. Instead of using spdy, I went back to using express and made haproxy use the http/2 protocol.
frontend http-in
bind *:80
mode http
redirect scheme https code 301
frontend https-in
mode http
bind *:443 ssl crt /path/to/cert.pem alpn h2,http/1.1
the key here is this part alpn h2,http/1.1
I use node.js and socket.io.
I have an application that runs on the IP address: 31.31.69.79:3000
I have a domain name: zkus.eu - I want to redirect this domain to this ip: 31.31.69.79:3000
How do I set haproxy config (haproxy.cfg)?
There are several examples on the haproxy site: http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
That said, a fairly minimal config (taken from the examples on that page) is:
global
daemon
maxconn 256
defaults
mode http
timeout connect 5000ms
timeout client 50000ms
timeout server 50000ms
listen http-in
bind *:80
server server1 127.0.0.1:3000 maxconn 32