"Could not find a valid Docker environment" error while running tests from Jenkins on the Ubuntu

The environment:

Host machine: Ubuntu 16.04 with Docker installed and running;
Jenkins which is run via Docker container on the same host machine.

I am using testcontainers-java in my project and trying to setup executing SeleniumWebdriver tests via Maven from the Jenkins CI. Example code is taken from the official documentation and works perfectly if I run tests from IDE installed on the same Linux host machine, or if I run tests from a terminal via Maven - testcontainers-java starts an appropriate container and I receive correct data from the browser under test.

However, when I try to run the same tests with the same set of Maven commands from a Jenkins job - I receive the following error:

java.lang.IllegalStateException: Could not find a valid Docker environment. Please see logs and check configuration at org.testcontainers.dockerclient.DockerClientProviderStrategy.lambda$getFirstValidStrategy$2(DockerClientProviderStrategy.java:146) at java.util.Optional.orElseThrow(Optional.java:290) at org.testcontainers.dockerclient.DockerClientProviderStrategy.getFirstValidStrategy(DockerClientProviderStrategy.java:138) at org.testcontainers.DockerClientFactory.client(DockerClientFactory.java:99) at org.testcontainers.containers.GenericContainer.<init>(GenericContainer.java:126) at org.testcontainers.containers.GenericContainer.<init>(GenericContainer.java:166) at org.testcontainers.containers.BrowserWebDriverContainer.<init>(BrowserWebDriverContainer.java:61)

I suspect that there is maybe some issue because Jenkins itself is running inside another container and cannot get access to the installed Docker instance from inside. Is there any way to solve this issue? I was trying to search for a solution a lot but didn’t succeed. This forum is my last hope

Issue Analytics

State:
Created 6 years ago
Comments:24 (9 by maintainers)

Top GitHub Comments

17reactions

endless-qacommented, Mar 23, 2018

So, the final solution that works for me:

Add jenkins user to the docker group: sudo usermod -aG docker jenkins
Reboot a host machine. Optionally, you can open the terminal under the jenkins user and run the groups command to make sure that there is the docker group in the list.

After that Jenkins is able to deal with the docker.sock file and TestContainers can see the Docker installation.

12reactions

jabrenacommented, Nov 6, 2018

In my case, I solved the issue in the following way:

sudo chmod 666 /var/run/docker.sock

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