How to pull docker image from ECR in Githubactions - docker

Question

I'm trying to pull docker image from ECR and deploy it on ec2 instance. However it's throwing an error like
docker pull $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG
======END======
err: invalid reference format
2022/11/03 15:31:54 Process exited with status 1
My yml file is:
name: Docker Image CI
on:
push:
branches: [ "main" ]
jobs:
build:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout#v3
- name: Configure AWS credentials
uses: aws-actions/configure-aws-credentials#v1
with:
aws-access-key-id: ${{ secrets.TF_USER_AWS_KEY }}
aws-secret-access-key: ${{ secrets.TF_USER_AWS_SECRET }}
aws-region: us-east-1
- name: Login to Amazon ECR
id: login-ecr
uses: aws-actions/amazon-ecr-login#v1
- name: Build, tag, and push image to Amazon ECR
env:
ECR_REGISTRY: ${{ steps.login-ecr.outputs.registry }}
ECR_REPOSITORY: githubactions
IMAGE_TAG: githubactions_image
run: |
docker build -t $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG .
docker push $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG
- name: Docker pull & run from github
uses: appleboy/ssh-action#master
with:
host: ec2-3-86-102-151.compute-1.amazonaws.com
username: ec2-user
key: ${{ secrets.ACTIONS_PRIVATE_KEY }}
envs: GITHUB_SHA
script: |
docker pull $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG
I spent a lot of time and I can't really understand what's wrong. Any idea really appreciated.

Answer 1

Your issue is with the Env vars.
You are confusing the github server to the ec2 server.
The env var you mention in the github yml do no exist on the remote machine(ec2).
The cmd -> docker pull $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG failing cause the remote mahicne(ec2) do not know about your github env vars.
from the docs here you can see that there is an easy built-in way to pass it to the ec2 instance
- name: pass environment
uses: appleboy/ssh-action#master
+ env:
+ FOO: "BAR"
+ BAR: "FOO"
+ SHA: ${{ github.sha }}
with:
host: ${{ secrets.HOST }}
username: ${{ secrets.USERNAME }}
key: ${{ secrets.KEY }}
port: ${{ secrets.PORT }}
+ envs: FOO,BAR,SHA
script: |
echo "I am $FOO"
echo "I am $BAR"
echo "sha: $SHA"
hope it helps and goodluck

Answer 2

I would first add an ls and echo:
run: |
pwd
ls -arth
echo "docker build -t $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG ."
docker ...
That way, I would check if I am in the right folder (with a Dockerfile in it), and if all variables are indeed valued.
If you see <aregistry>/<arepo>: (meaning no tag), the final ':' might be enough to trigger the error message.
That or:
the name use the wrong hyphen '-' as in this issue.
the image name has an invalid character like a \
the image name uses the wrong syntax