Docker on Daniel Pomfret

GitLab CI: failed to dial gRPC: cannot connect to the Docker daemon. Is 'docker daemon' running on this host?

Sun, 28 Jul 2019 00:00:00 +0000

The latest docker:dind has breaking changes. Here are two fixes if you are enchanting issues with GitLab CI and your runners.

Fix 1: GitLab CI Config

Add the following to your .gitlab-ci.yml

variables:
    DOCKER_TLS_CERTDIR: ""

Fix 2: Change runner config

Alternatively, another fix is to change the runner:

$ nano /etc/gitlab-runner/config.toml

Modify to mach the following (specifically environment and volumes)

[[runners]]
  environment = ["DOCKER_DRIVER=overlay2","DOCKER_TLS_VERIFY=1","DOCKER_CERT_PATH=/certs/client"]
  [runners.docker]
    image = "docker:dind"
    privileged = true
    disable_entrypoint_overwrite = false
    oom_kill_disable = false
    disable_cache = false
    volumes = ["/cache","/certs"]

Then restart the gitlab runner

Docker stop all Containers

Tue, 09 Oct 2018 00:00:00 +0000

Last brain dump of today. Here’s some quick commands to stop running docker containers and also clean up afterwards (remove container files, and images).

Stop all containers:

docker stop $(docker ps -aq)

Remove all containers:

docker rm $(docker ps -aq)

Remove all images:

docker rmi $(docker images -q)

GitLab : Build Docker Image within CI/CD Pipeline

Tue, 09 Oct 2018 00:00:00 +0000

Another brain dump for future reference. This is when setting up gitlab to build and run docker images when the CI/CD pipeline runs.

Install gitlab-runner

On a linux x86-64 download the gitlab-runner package:

sudo wget -O /usr/local/bin/gitlab-runner https://gitlab-runner-downloads.s3.amazonaws.com/latest/binaries/gitlab-runner-linux-amd64

Give it permissions:

sudo chmod +x /usr/local/bin/gitlab-runner

Install docker:

curl -sSL https://get.docker.com/ | sh

Create the gitlab-runner user:

sudo useradd –comment ‘GitLab Runner’ –create-home gitlab-runner –shell /bin/bash

Install gitlab-runner:

sudo gitlab-runner install –user=gitlab-runner –working-directory=/home/gitlab-runner