Running Selenoid on Jenkins Docker image - jenkins

Question

I have Jenkins installed in Docker container by the following guideline
https://www.jenkins.io/doc/book/installing/docker/
I am also trying to install Selenoid image in Jenkins using the pipeline
pipeline {
agent any
stages {
stage('Prepare Selenoid') {
steps {
sh 'wget "https://github.com/aerokube/cm/releases/download/1.8.2/cm_linux_amd64"'
sh 'chmod +x cm_linux_amd64'
sh './cm_linux_amd64 selenoid start –vnc'
sh 'docker ps'
sh 'docker logs selenoid'
sh 'curl http://localhost:4444/status'
}
}
}
post {
always {
script {
sh 'docker stop selenoid'
sh 'docker rm selenoid'
}
}
}
}
When I run this job, I got the following logs:
...
> Starting Selenoid...
> Successfully started Selenoid
+ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
99467c57d5c6 aerokube/selenoid:1.10.9 "/usr/bin/selenoid -…" 2 seconds ago Up Less than a second 0.0.0.0:4444->4444/tcp selenoid
+ docker logs selenoid
2023/01/13 17:09:45 [-] [INIT] [Loading configuration files...]
2023/01/13 17:09:45 [-] [INIT] [Loaded configuration from /etc/selenoid/browsers.json]
2023/01/13 17:09:45 [-] [INIT] [Video Dir: /opt/selenoid/video]
2023/01/13 17:09:45 [-] [INIT] [Logs Dir: /opt/selenoid/logs]
2023/01/13 17:09:45 [-] [INIT] [Using Docker API version: 1.41]
2023/01/13 17:09:45 [-] [INIT] [Timezone: UTC]
2023/01/13 17:09:45 [-] [INIT] [Listening on :4444]
+ curl http://localhost:4444/status
% 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 localhost port 4444: Connection refused
script returned exit code 7+
...
I also tried different options:
0.0.0.0:4444/status
127.0.0.1:4444/status

Answer 1

Your pipeline code is probably also running in another container. So localhost inside this container is not the localhost of the host machine you are expecting to access. Try to use http://selenoid:4444/, but make sure your container is running in selenoid network being used by CM tool by default.