Azure docker container wont start

Question

Hello,

For the last couple of days I have been trying to get a Docker container running on Azure. I have a basic Laravel project and am using a basic Dockerfile and Azure pipeline and release pipeline.

The image is successfully pulled but afterwards is not starting. I am getting the following logs:

2021-08-09T17:22:37.829Z INFO - Status: Image is up to date for ******.azurecr.io/app:latest
2021-08-09T17:22:37.832Z INFO - Pull Image successful, Time taken: 0 Minutes and 0 Seconds
2021-08-09T17:22:37.879Z INFO - Starting container for site
2021-08-09T17:22:37.885Z INFO - docker run -d -p 3535:80 --name integration-docker_0_beec5a09 -e DOCKER_CUSTOM_IMAGE_NAME=******.azurecr.io/app:latest -e PORT=80 -e WEBSITES_ENABLE_APP_SERVICE_STORAGE=false -e WEBSITES_PORT=80 -e WEBSITE_SITE_NAME=integration-docker -e WEBSITE_AUTH_ENABLED=False -e WEBSITE_ROLE_INSTANCE_ID=0 -e WEBSITE_HOSTNAME=integration-docker.azurewebsites.net -e WEBSITE_INSTANCE_ID=e55efd6783db50fae15b26e5ec67d28845ef537db278e9c1346becd2b2f1a777 -e HTTP_LOGGING_ENABLED=1 ******.azurecr.io/app:latest
2021-08-09T17:22:40.900Z INFO - Initiating warmup request to container integration-docker_0_beec5a09 for site integration-docker
2021-08-09T17:22:41.975Z ERROR - Container integration-docker_0_beec5a09 for site integration-docker has exited, failing site start
2021-08-09T17:22:41.978Z ERROR - Container integration-docker_0_beec5a09 didn't respond to HTTP pings on port: 80, failing site start. See container logs for debugging.
2021-08-09T17:22:41.985Z INFO - Stopping site integration-docker because it failed during startup.

I also see this error: standard_init_linux.go:219: exec user process caused: exec format error

Help is much appreciated.

Kind regards,
Rik

Answer

The Issue is boils down to an Issue inside the container, which can come either by building the container from a different architecture than you container image or an issue executing your executable. Can you share your Dockerfile? Also the output from docker manifest inspect --verbose .azurecr.io/app:latest can help pinpoint the issue

Otherwise these two links should point out the most common issues:

Answer

Hi Nikomix,

I saw those topics on Stackoverflow but my containter is being started by Azure. At least I see in the logs it's trying to.

My Dockerfile:

FROM php:8  
  
# Install system dependencies  
RUN apt-get update && apt-get install -y \  
    git \  
    curl \  
    libpng-dev \  
    libonig-dev \  
    libxml2-dev \  
    zip \  
    unzip  
  
# Get latest Composer  
RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer  
  
# Install PHP extensions  
RUN docker-php-ext-install pdo_mysql mbstring exif pcntl bcmath gd  
  
WORKDIR /app  
COPY . /app  
  
RUN composer install  
  
EXPOSE 80

I also tried to deploy a Dockerfile with php:7.4-fpm

And I am using this azure pipeline yml

# Docker  
# Build and push an image to Azure Container Registry  
# https://learn.microsoft.com/azure/devops/pipelines/languages/docker  
  
trigger:  
- main  
  
resources:  
- repo: self  
  
variables:  
  # Container registry service connection established during pipeline creation  
  dockerRegistryServiceConnection: 'c64767bd-b4de-4a17-b058-7a69e0f096f4'  
  imageRepository: 'app'  
  containerRegistry: '****.azurecr.io'  
  dockerfilePath: '$(Build.SourcesDirectory)/Dockerfile'  
  tag: '$(Build.BuildId)'  
  
  # Agent VM image name  
  vmImageName: 'ubuntu-latest'  
  
stages:  
- stage: Build  
  displayName: Build and push stage  
  jobs:  
  - job: Build  
    displayName: Build  
    pool:  
      vmImage: $(vmImageName)  
    steps:  
    - task: Docker@2  
      displayName: Build and push an image to container registry  
      inputs:  
        command: buildAndPush  
        repository: $(imageRepository)  
        dockerfile: $(dockerfilePath)  
        containerRegistry: $(dockerRegistryServiceConnection)  
        tags: |  
          $(tag)

Azure docker container wont start

2 answers