How to start custom entry point?

Drone Support
1

Hi all

I have created a docker image that has the following content:

FROM ubuntu:bionic as builder

RUN apt-get update

RUN apt-get install -y curl

RUN apt-get install -y git

RUN curl -L https://github.com/digitalocean/doctl/releases/download/v1.41.0/doctl-1.41.0-linux-amd64.tar.gz | tar xz

RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl

RUN curl -L https://github.com/argoproj/argo-cd/releases/download/v1.4.3/argocd-linux-amd64 -o argocd

RUN curl -L https://get.helm.sh/helm-v3.2.1-linux-amd64.tar.gz | tar xz

RUN chmod +x ./argocd

RUN chmod +x ./kubectl

RUN chmod +x ./linux-amd64/helm

RUN mv ./argocd /usr/local/bin/

RUN mv ./kubectl /usr/local/bin/

RUN mv ./doctl /usr/local/bin/

RUN mv ./linux-amd64/helm /usr/local/bin/

COPY connection.sh /usr/local/bin/

RUN chmod +x /usr/local/bin/connection.sh

ENTRYPOINT ["/usr/local/bin/connection.sh"

When I use the image in the pipeline:

  - name: DEV deployment
    image: hub.example.io/devops/argcd-cli:0.1.6
    commands:
      - git clone https://$USER:$PW@gitlab.com/example.io/gitops.git
      - cd gitops
      - echo $IMAGE_VERSION
      - helm template dashboard --set image.tag=$IMAGE_VERSION ./dashboard | tee  ./dashboard/dev/app.yml
      - sleep 1
      - git add . --all

The connection.sh script does not get called. Unlike when I start a container with the image

docker run --rm -it \                                                 
        --name argo \
        argocd-cli

then the connection.sh script gets called.

The question is, when the DEV deployment step starts, how to execute connection.sh script first before commands get executed?

Thanks

2

The commands section is converted to a shell script that is executed as the container entrypoint. This means the default entrypoint of your image is ignored, by design, if you specify a commands section.

The steps section defines a series of shell commands. These commands are executed inside the Docker container as the Entrypoint . If any command returns a non-zero exit code, the pipeline fails and exits.

If you need the script to execute you should add to your commands section:

  - name: DEV deployment
    image: hub.example.io/devops/argcd-cli:0.1.6
    commands:
+     - /usr/local/bin/connection.sh
      - cd gitops
      - echo $IMAGE_VERSION
      - helm template dashboard --set image.tag=$IMAGE_VERSION ./dashboard | tee  ./dashboard/dev/app.yml
      - sleep 1
      - git add . --all
1 Like
3

Thanks a lot for your help.