One of the main benefits of Docker is reproducibility. One can specify exactly which programs and libraries get installed how and where, for example. However, I'm trying to think this through and can't wrap my head around it. How I…
I'm trying to get a small webapp running in a Docker container with very little experience in Docker. The webapp uses input from a form, renders a template and returns it as a text file to the user. If I…
ERROR: The Compose file './docker-compose.yml' is invalid because: services.jenkins.networks contains an invalid type, it should be an array, or an object version: '3' services: jenkins: container_name: jenkins image: jenkins ports: - "8080:8080" volumes: - "$PWD/jenkins_home:/var/jenkins_home" networks: -net networks: net: Docker-Compose…
I did the following: https://github.com/dockersamples/example-voting-app cd example-voting-app Inside that there are number of files/folders MAINTAINERS LICENSE Jenkinsfile ExampleVotingApp.sln README.md docker-stack-windows-1809.yml docker-stack-simple.yml docker-compose.yml docker-compose-windows.yml docker-compose-windows-1809.yml docker-compose-simple.yml docker-compose-k8s.yml docker-compose-javaworker.yml architecture.png kube-deployment.yml k8s-specifications docker-stack.yml docker-stack-windows.yml result vote worker I did cd vote and…
I am trying to create my own image based on Centos. I don't understand why when I use CMD command in my docker file to execute a script at startup, it's impossible to start my image (Exited (0) immediatly). If…
I followed this docker tutorial https://docs.docker.com/compose/gettingstarted/ So i ended with a python app which is connects to Redis. When I go to http://localhost:5000/ I can see that every time I refresh the page, a counter adds up by 1. I…
When enter the command in powershell I get this error "invalid argument "Dockerfile2**" for "-t, --tag" flag: invalid reference format: repository name must be lowercase See docker build --help. The Dockerfile I created is in word but I saved it…
HY i have a docker container on the setup i get a error that the system is unable to connect to the database i cant figure it out how this comes. i tried connecting to localhost, 127.0.0.1 and mysql but…
I am getting this message on building a Debian:stretch-slim Docker image with Python 3.7.7: gpg: keyserver receive failed: Cannot assign requested address The command '/bin/sh -c set -ex [...]' [...] returned a non-zero code: 2 I think it's a GPG…
I need to create a docker-compose file for flask based API back end application. But this application is based on several other libraries following. All need to run on docker containers only. Can you suggest how will be the docker-compose…