Curl: (7) Failed to connect to 127.0.0.1 port 3000: Connection refused

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1

Here is the section in my Jenkinsfile:

stage(‘Start container’) {
steps {
sh ‘docker compose up -d --no-color --wait’
sh ‘docker compose ps’
}
}
stage(‘Run tests against the container’) {
steps {
sh ‘curl http://127.0.0.1:3000/param?query=demo | jq’
}
}

In the test stage above, I got the error below:

  • curl http://127.0.0.1:3000/param?query=demo

  • jq
    % Total % Received % Xferd Average Speed Time Time Time Current
    Dload Upload Total Spent Left Speed

    0 0 0 0 0 0 0 0 --:–:-- --:–:-- --:–:-- 0
    0 0 0 0 0 0 0 0 --:–:-- --:–:-- --:–:-- 0
    curl: (7) Failed to connect to 127.0.0.1 port 3000: Connection refused.

Could anyone please help me resolve the issue? Thanks much.

2

Sounds like your service isn’t running or isn’t listening on that port.

My guess is its not finished starting up yet but it’s purely a guess. I recommend checking your app logs

3

Thanks much for your reply. The container is running as shown by ‘docker compose ps’. Below is more console output:

  • docker compose up -d --no-color --wait
    Container jenkins-docker-compose_master-echo-server-1 Recreate
    Container jenkins-docker-compose_master-echo-server-1 Recreated
    Container jenkins-docker-compose_master-echo-server-1 Starting
    Container jenkins-docker-compose_master-echo-server-1 Started
    [Pipeline] sh

  • docker compose ps
    NAME COMMAND SERVICE STATUS PORTS
    jenkins-docker-compose_master-echo-server-1 “node webserver” echo-server running 0.0.0.0:3000->80/tcp
    [Pipeline] }
    [Pipeline] // stage
    [Pipeline] stage
    [Pipeline] { (Run tests against the container)
    [Pipeline] sh

  • curl http://127.0.0.1:3000/param?query=demo

  • jq
    % Total % Received % Xferd Average Speed Time Time Time Current
    Dload Upload Total Spent Left Speed

    0 0 0 0 0 0 0 0 --:–:-- --:–:-- --:–:-- 0
    0 0 0 0 0 0 0 0 --:–:-- --:–:-- --:–:-- 0
    curl: (7) Failed to connect to 127.0.0.1 port 3000: Connection refused

4

My statement still stands, either your service isn’t running (finished starting up, or has quit) or not listening on that port. Maybe add a post { failure { sh('docker-compose logs') } } or something

Is your service listing on port 80? or port 3000? cause thats mapping port 3000 outside docker to port 80 inside docker.

5

Thanks again for your reply.
Yes, the docker container is running on Jenkins. The original service is on port 80 which is mapped to 3000.
I added post { always { sh('docker-compose logs') } }

Here is the output:

  • docker compose logs
    jenkins-docker-compose_master-echo-server-1 | (node:1) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
    jenkins-docker-compose_master-echo-server-1 | (Use node --trace-deprecation ... to show where the warning was created)
    jenkins-docker-compose_master-echo-server-1 | Listening on port 80.
6

I am just following a 9-minute tutorial here:

7

I am having exact same issue, and no solution on the horizon. did you manage to get this working

8

Docker compose up -d doesn’t wait for the process to start. You need to get your script to wait.

Also you need to make sure your ports are exposed

I recommend the wait for it nash script

9

Thanks for the reply, but I am pretty sure that is not the problem. I tried many approaches, even manually starting containers and trying to access after making sure they are up and running, but still no luck. Only thing that is different is that I am running Jenkins inside docker container (dind). I guess it has to do something with docker networking but still cant find my way through :frowning:

10

It’s not localhost:3000 (or whatever port you gave echo-server), but instead [port of your PC]:3000
e.g: instead of localhost:3000, put 172.25.16.1:3000
hope this helps!

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