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Description:

I have created a test project to serve a simple HTML page with httpd:alpine image. The following are the parts of the repository:

index.html:

<html lang="en"> <head> <meta charset="UTF-8"> <title>Rostami test page</title> </head> <body> <h1>Hey guys!</h1> </body> </html>

Dockerfile:

FROM httpd:alpine COPY ./ /usr/local/apache2/htdocs/

docker-compose.yml:

version '2.2' services: myhtml: image: html_mrt:latest ports: - "9999:80" restart: on-failure container_name: HTML_Rostami

.gitlab-ci.yml:

stages: - build - deploy build: stage: build script: - docker build -t html_mrt . tags: - docker deploy: stage: deploy script: - docker-compose up -d - docker rmi $(docker image -q filter "dangling=true") tags: - docker

Issue:

In addition, when I execute gitlab-runner status on the GitLab-Runner container, it says:

Runtime platform arch=amd64 os=linux pid=79 revision=a998cacd version=13.2.2 gitlab-runner: Service is not running.

I've tried to start the service by gitlab-runner start but nothing has affected.

Problem:

It's the log of the build stage:

Running with gitlab-runner 13.2.2 (a998cacd) on Test K-1ZsHyF Preparing the "docker" executor 00:11 Using Docker executor with image docker ... Pulling docker image docker ... Using docker image sha256:81f5749c9058a7284e6acd8e126f2b882765a17b9ead14422b51cde1a110b85c for docker ... Preparing environment 00:02 Running on runner-k-1zshyf-project-1-concurrent-0 via 806fd175c866... Getting source from Git repository 00:03 Fetching changes with git depth set to 50... Reinitialized existing Git repository in /builds/m.rostami/test/.git/ Checking out 82d339a9 as master... Skipping Git submodules setup Executing "step_script" stage of the job script 00:04 $ docker build -t html_mrt . time="2020-08-18T06:36:52Z" level=error msg="Can't add file /builds/m.rostami/test/docker-compose.yml to tar: io: read/write on closed pipe" time="2020-08-18T06:36:52Z" level=error msg="Can't close tar writer: io: read/write on closed pipe" error during connect: Post http://docker:2375/v1.40/build?buildargs=%7B%7D&cachefrom=%5B%5D&cgroupparent=&cpuperiod=0&cpuquota=0&cpusetcpus=&cpusetmems=&cpushares=0&dockerfile=Dockerfile&labels=%7B%7D&memory=0&memswap=0&networkmode=default&rm=1&session=8jgar93piqxu2s7y5yp9w2wtg&shmsize=0&t=html_mrt&target=&ulimits=null&version=1: dial tcp: lookup docker on 192.168.1.1:53: no such host ERROR: Job failed: exit code 1

192.168.1.1 is the default gateway and nameserver of the host that the Docker daemon is running.

How to fix the problem?

Thanks in advance.

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1 Answer 1

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I image you have used the dockerExecutor in gitlab-runner. This means you try to use docker-in-docker. https://docs.gitlab.com/ee/ci/docker/using_docker_build.html

I suggest to configure the docker socket binding which might be less secure but very easy to handle.

To register a runner with docker-in-docker support mount the /var/run/docker.sock:/var/run/docker.sock e.g.

sudo gitlab-runner register -n \ --url https://gitlab.com/ \ --registration-token REGISTRATION_TOKEN \ --executor docker \ --description "My Docker Runner" \ --docker-image "docker:19.03.12" \ --docker-volumes /var/run/docker.sock:/var/run/docker.sock
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