curl: (7) Failed to connect to localhost port 15672: Connection refused

Question

I want to use jenkins to run our testcases but our application has set of docker container which will get initiated when i run npm run deploy:

problem: rabbitmq port is refused:localhost port 15672: Connection refused from inside the container while it is reachable outside the container.

following are the current setup details:

1. docker image from jenkins/jenkins:lts

2. using dockerfile that will build the dependencies for jenkins that also has curl docker(docker inside docker), docker build will build image tagged by

3. docker run --name myjenkins -u root -d -p 8080:8080 -p 50000:50000 -v jenkins-data:/var/jenkins_home -v /var/run/docker.sock:/var/run/docker.sock testSample

   root@373d88dc52e5:/var/jenkins_home/workspace/pipelineDemo@script# curl http://localhost:15672
   curl: (7) Failed to connect to localhost port 15672: Connection refused
   

4. but when I use --net=host in docker run command as follows:

   docker run --name myjenkins -u root -d -p 8080:8080 -p 50000:50000
   -v jenkins-data:/var/jenkins_home 
   /var/run/docker.sock:/var/run/docker.sock --net =host testSample
   

Rabbitmq is responding and I can run all my test cases

but my project does not want me to use --net=host for security issues is there any other way such that i can reach rabbitmq and run testcases?