Hello to all the readers!
There is multi stage build in which the build time and run time dependencies are separated.
For example JDK is required to build java app but JDK is not required in final image to be run.
FROM maven AS build
WORKDIR /app
COPY . .
RUN mvn package
FROM tomcat
COPY --from=build /app/target/file.war /usr/local/tomcat/webapps We copy only executable files from build stage that has to run thereby reducing the docker image size.
A warm Hello to all the readers! While we are making changes in container, we need to make an image out it so that it can be copied to different system. Following is the process to make an image and later on create container out of that image. List the running containers Next is to…
Hello to all the readers! There is another concept of bind mounts in docker that allows to share the host machine directory inside docker. The contents changed on the host machine or inside docker are reflected on both sides. Here is how to use a bind mount. Now if we make changes in this directory…
Hello to all the readers! While I was learning Docker, I could see that in most of the places, alpine image of Node.js or Golang is used. Therefore, I went and studied what is an alpine image. The alpine docker image is based on Alpine linux. It is a very small, minimal image with complete…
A warm Hello to all the readers! So, you already read the title of this article. I felt the need to share Docker image that I have built with my colleague. But not via Docker hub or any other private or public container registry. Therefore, I tried to find what is the solution to it….
Hello to all the readers! In this post I will be creating a docker image out of the simple tutorial posted on Docker’s documentation. Let us begin with the steps. Clone the repository Create Dockerfile. Dockerfile is a set of instructions to build the docker image. Next is to build the image. This builds the…
Hello to all the readers! Any data that is generated inside a container by operations is lost once container is stopped. Therefore in order to persist the data in a container, volumes are created and attached to the container. Now we will run a container created out of getting-started image and mount the volume to…