Connect to RabbitMQ via URL - rabbitmq

I'm trying to connect to the rabbitmq which is hidden behind nginx proxy. It's declared as:
location ^~ /rabbitmq/ {
proxy_pass http://127.0.0.1:5672/;
}
The problem is that as I found AMPQ only specifies host but it doesn't know anything about urls.
Can I connect rabbit client to www.myserver.com/rabbitmq somehow? I'm using EasyNetQ to connect, but it looks like a protocol limitation, and implementation doesn't matter.
If it's not possible at all maybe there are some workarounds?

For AMQP, If using Nginx probably doing a TCP load balancing could help: https://docs.nginx.com/nginx/admin-guide/load-balancer/tcp-udp-load-balancer/, otherwise if you could use HAProxy you could try something like this:
frontend rabbitmq
mode tcp
bind *:5672
use_backend bunny
backend bunny
mode tcp
server bunny 127.0.0.1:5672 check
If you want to publish message over HTTP probably you would like to expose the rabbitmq API:
http://localhost:15672/api/index.html
Notice the port 15672, from the docs:
Note that the UI and HTTP API port — typically 15672 — does not support AMQP 0-9-1, AMQP 1.0, STOMP or MQTT connections. Separate ports should be used by those clients.

Related

How many total TCP connections are created for web socket call from browser to apache http server to web service

I would like to know how many TCP connections are created when WebSocket call is made from browser to apache http server to backend web service?
Does it create a separate TCP connection from the browser to apache http server and from apache to the web service?
When Apache is proxying websockets, there is 1 TCP connection between the client and Apache and 1 TCP connection between Apache and the backend.
Apache watches both connections for activity and forwards read from one onto the other.
This is the only way it can be in a layer 7 (Application Layer, HTTP) proxy. Something tunnelling at a much lower layer, like a NAT device or MAC forwarding IP sprayer could tunnel a single connection -- but not on the basis of anything higher up in the stack like headers.
The 2nd connection is observable with netstat.
The 2nd connection is opened when mod_proxy_wstunnel calls ap_proxy_connect_to_backend() which calls apr_socket_create() which calls the portable socket() routine. When recent releases of mod_proxy_http handle this tunneling automatically, simialr flow through ap_proxy_acquire_connection.

How to setup RabbitMQ Dynamic Shovel in SSL

I want to setup a Shovel in which the destination RabbitMQ is configured to be TLS enabled.
I am unable to create a Shovel and the shovel stays in a starting state.
I have two different RabbitMQ instance in two separate docker container, one of them exposed via port 5671 (SSL) and 6671 (SSL) from host machine.
I am using RabbitMQ management plugin to establish the shovel
Below are the connection details
Source AMQP URI:
amqp://admin:pass#localhost:5672 (non-SSL)
Target AMQP URI
amqps://localhost:6671?cacertfile=/data/shared-file/certificates/ca_certificate.pem&certfile=/data/shared-file/certificates/client_certificate.pem&keyfile=/data/shared-file/certificates/client_key.pem&verify=verify_peer&server_name_indication=MyTestCA
What could be the problem here?
Kindly help

How is TLS termination implemented in AWS NLB?

AWS NLB supports TLS termination
https://aws.amazon.com/blogs/aws/new-tls-termination-for-network-load-balancers/
NLB being a Layer 4 load balancer I would expect it to work in a passthrough mode by directing the incoming packets to one of the backends without much of state maintenance (except for the flow tracking)
Are there any details available on how AWS implements the TLS termination in NLB ?
Is it possible to do it with open source tooling (like IPVS or haproxy) or AWS has some secret sauce here ?
The TLS termination itself is just what it says it is. TLS is a generic streaming protocol just like TCP one level up so you can unwrap it at the LB in a generic way. The magic is that they keep the IPs intact probably with very fancy routing magic, but it seems unlikely AWS will tell you how they did it.
In my SO question here, I have an example of how to terminate a TCP session in HAProxy and pass the unencrypted traffic to a backend.
In short, you need to use ssl in the frontend bind section and both frontend and backend configurations require use of tcp mode. Here is an example of terminating on port 443 and forwarding to port 4567.
frontend tcp-proxy
bind :443 ssl crt combined-cert-key.pem
mode tcp
default_backend bk_default
backend bk_default
mode tcp
server server1 1.2.3.4:4567

WebSockets: wss from client to Amazon AWS EC2 instance through ELB

How can I connect over ssl to a websocket served by GlassFish on an Amazon AWS EC2 instance through an ELB?
I am using Tyrus 1.8.1 in GlassFish 4.1 b13 pre-release as my websocket implementation.
Port 8080 is unsecured, and port 8181 is secured with ssl.
ELB dns name: elb.xyz.com
EC2 dns name: ec2.xyz.com
websocket path: /web/socket
I have successfully used both ws & wss to connect directly to my EC2 instance (bypassing my ELB). i.e. both of the following urls work:
ws://ec2.xyz.com:8080/web/socket
wss://ec2.xyz.com:8181/web/socket
I have successfully used ws (non-ssl) over my ELB by using a tcp 80 > tcp 8080 listener. i.e. the following url works:
ws://elb.xyz.com:80/web/socket
I have not, however, been able to find a way to use wss though my ELB.
I have tried many things.
I assume that the most likely way of getting wss to work through my ELB would be to create a tcp 8181 > tcp 8181 listener on my ELB with proxy protocol enabled and use the following url:
wss://elb.xyz.com:8181/web/socket
Unfortunately, that does not work. I guess that I might have to enable the proxy protocol on glassfish, but I haven't been able to find out how to do that (or if it's possible, or if it's necessary for wss to work over my ELB).
Another option might be to somehow have ws or wss run over an ssl connection that's terminated on the ELB, and have it continue unsecured to glassfish, by using an ssl > tcp 8080 listener. That didn't work for me, either, but maybe some setting was incorrect.
Does anyone have any modifications to my two aforementioned trials. Or does anyone have some other suggestions?
Thanks.
I had a similar setup and originally configured my ELB listeners as follows:
HTTP 80 HTTP 80
HTTPS 443 HTTPS 443
Although this worked fine for the website itself, the websocket connection failed. In the listener, you need to allow all secure TCP connection as opposed to SSL only to allow wss to pass through as well:
HTTP 80 HTTP 80
SSL (Secure TCP) 443 SSL (Secure TCP) 443
I would also recommend raising the Idle timeout of the ELB.
I recently enabled wss between my browser and an EC2 Node.js instance.
There were 2 things to consider:
in the ELB listeners tab, add a row for the wss port with SSL as load balancer protocol.
in the ELB description tab, set an higher idle timeout (connection settings), which is 60 sec by default. The ELB was killing the websocket connections after 1 minute, setting the idle timeout to 3600 (the max value) enables much longer communication.
It is obviously not the ultimate solution since the timeout is still there, but 1 hour is probably good enough for what we usually do.
hope this help

how to provide tcp/ssl support on the same port

Le'ts say you open a tcp socket on port 80 to handle http request, and a ssl socket on port 443 to deal with https...how can some proxy provide access to both of them on the same port??
I found only this link but it wasn't very useful. Can you provide me an erlang example or suggest me some resources from which i can learn more on the topic?
Thanks in advance
how can some proxy provide access to both of them on the same port??
By implementing the HTTP CONNECT method, the (non-transparent) proxy may switch to providing a TCP tunnel over which a browser may, for example, access an HTTPS resource.
A rather sparse specification:
https://www.rfc-editor.org/rfc/rfc2616#section-9.9
As outlined in the link you provide, you will need to write your own custom server that sniffs the request and then redirects to the correct protocol accordingly.
As http://www.faqs.org/rfcs/rfc2818.html indicates, an HTTP session will start with an Initial Request Line (e.g. GET /), whereas a TLS session will start with a ClientHello (more on the TLS session on wikipedia)
There are lots of resources online about writing servers in Erlang, e.g. How to write a simple webserver in Erlang?
Incidentally your terminology is incorrect: http, https SSL and TLS are protocols, and all operate (over the web) using TCP sockets.