I am unable to use docker commands in google/cloud-sdk image - docker

Question

I am running a yml script in gitlab where I am using gitlab-ci.yaml to create a docker image and push it to Google Registry. Where as I am unable to run the commands. Here is my gitlab code.
image: docker:latest
services:
- docker:dind
variables:
SPRING_PROFILES_ACTIVE: gitlab-ci
stages:
- build
- imagecreation
- deploy
maven-build:
image: maven:3-jdk-8
stage: build
script: "mvn package -B"
artifacts:
paths:
- target/*.war
docker-build:
image: google/cloud-sdk
stage: imagecreation
script:
- docker build -t gcr.io/project-test-to/counter .
- gcloud docker -- push gcr.io/project-test-to/counter
k8s-deploy:
image: google/cloud-sdk
stage: deploy
script:
- echo "$GOOGLE_KEY" > key.json
- gcloud auth activate-service-account --key-file key.json
- gcloud config unset container/use_client_certificate
- gcloud container clusters get-credentials gitlab --zone us-central1-a --project project-test-to
- kubectl apply -f deployment.yaml
Her is the error that I am getting.Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
ERROR: Job failed: exit code 1
How can I run the docker commands in this image?(google/cloud-sdk)

Answer 1

You need to add Docker in Docker service then bind your runner on this service with DOCKER_HOST . Here my configuration
job:publish:api:
image: google/cloud-sdk:latest
stage: publish
when: on_success
services:
- docker:dind
before_script:
- echo $GCLOUD_SERVICE_KEY > ${HOME}/gcloud-service-key.json
- gcloud auth activate-service-account --key-file ${HOME}/gcloud-service-key.json
- gcloud auth configure-docker
script:
- docker build --compress -t ${GCLOUD_IMAGE_CI_FULLNAME} .
- docker push ${GCLOUD_IMAGE_CI_FULLNAME}
variables:
DOCKER_HOST: tcp://docker:2375
DOCKER_TLS_CERTDIR: ""

Answer 2

Since the gcloud docker command simply passes commands to docker, and the docker image google/cloud-sdk doesn't seem to ship with docker installed, you might need to mount your host socket into the container like this:
docker-build:
image: google/cloud-sdk
stage: imagecreation
script:
- docker build -t gcr.io/project-test-to/counter .
- gcloud docker -- push gcr.io/project-test-to/counter
volume:
- "/var/run/docker.sock:/var/run/docker.sock"
Please also keep in mind the command gcloud docker is deprecated.

Answer 3

Following up on the original answer, the "gcloud docker" command is now deprecated as mentioned. To push an image to Container Registry, you just need to run the following:
$docker push
I would also suggest setting up the docker command so that you can run it as non root by following the steps mentioned in this documentation.

Answer 4

If this is CircleCI you are using to build the image you can use setup_remote_docker as described in:
https://circleci.com/docs/2.0/configuration-reference/#setup_remote_docker
https://circleci.com/blog/docker-what-you-should-know/
Then the config.yml looks something like:
create_app_docker:
docker:
- image: google/cloud-sdk:latest
steps:
- checkout
- setup_remote_docker
- run:
name: Build docker with application
command: |
docker --version
docker build -t my-app ./
docker images