As DevOps, we often make quite a lot of mistakes and one of the most oversight mistakes we generally do is forget to expose a port for the container. When you realize that you have not exposed any port for the container then you start looking for ways to change the port mapping of a live container or in other words, we …

When we package any application using Docker then either we create Dockerfile or docker-compose.yaml, even you can create both the files and share the files with others. There is one important aspect in both the files .i.e. PORT. Any container which you build and ship to other developers has to have one or more defined …

I am a real big fan of working with docker because it provides you a certain level of isolation and the ability to move your dockerize application anywhere from development to the production environment. But often when I work with the multiple numbers of running docker containers then it is often needed to restart a …

While working on my Spring Boot Microservices with Docker I felt a need to edit some of the files present under my docker container. But when I tried to edit the file nano application.yaml it throws me an error bash: nano: command not found. So I was not able to edit the file which is present inside my running docker …

In this blog post, we will look at the different ways to fix the Error starting docker service Unit not found. I faced this issue while I was trying to set up Kubernetes cluster on CentOS 8. As Kubernetes is a container orchestration tool and it is used for managing container images, so I had to install Docker before …

There are times in a project where you have been working for quite a long time and you create and tag docker images on daily basis but after some time it is generally observed that we tend to forget how many docker images we have build and tagged. I do not see a problem in building and tagging a new docker image number …

In this blog post we will look on ways to fix the docker error invalid reference format error. If you look at the error carefully then it says invalide reference format which mean the image name which you are trying to use in your Dockerfile or docker command is not acceptable. Basically a reference in docker is a …

I faced the error requested access to the resource is denied while I was trying to push my docker image of spring boot application to Docker Hub but unfortunately when I issued the docker push command I immediately got the error. In this article, we will look at How to fix requested access to the resource is denied …

This error comes when you try to delete/remove your docker image before removing your docker container. The basic principle of docker says you should always remove your docker container first before removing the docker image. In this article, we are going to see how to fix this issue along with the recommended way to …

Sometimes you must clean up your disk so that you can download the docker image and run it. But if you do not have sufficient space available on your disk then you might end up with the error no space left on device. In this blog, we are going to see a number of ways to fix this error because I had this issue many …