Docker – Manage Ports

Manage Ports in Docker The Docker containers run services inside it on a specific port. To access that services of container running on a port, You need to bind container port with some Docker host port. Example 1 Have a look at below image. You will see that docker host is running two containers, one is running Apache which has some website and other have MySQL. Now, you need to access the website running on Apache container on port 80. Let’s bind docker host port 8080 to containers port 80.…

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Docker – Dockerfile Directives

What are Dockerfile Directives In our previous tutorial, you learned how to build images with Dockerfile. This tutorial will help you to understand the basic Dockerfile directives and there uses. FROM The from directive is used to set base image for the subsequent instructions. A Dockerfile must have FROM directive with valid image name as the first instruction. Examples: FROM ubuntu FROM tecadmin/ubuntu-ssh:16.04 LABEL Using label you can organize images in a proper way. this is useful to set maintainer address, vender name, version of image, release date etc. The…

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Docker – Dockerfile

Working with Dockerfile Dockerfile is a file used to build images by reading instructions from a file. The default name is used as Dockerfile. You can create dockerfile in the current directory with specific instructions and build a customized image as per your requirements. Build Image with Dockerfile As a best practice, the Dockerfile is called Dockerfile and located in the root of the context. You can use the following command to build docker image. This will read Dockerfile in the current directory. $ docker build -t image_name . You…

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Docker – Data Volumes

Docker Data Volumes In docker, data volumes are useful for managing your data with Docker containers and host machines. Here you will find two way of managing data volumes on Docker containers. 1. Using the data volume container. 2. Using share data between the host and the Docker container #1. Use Docker Data Volume Container The Docker data volume container is same as other containers, but they just used for storage only. You can use storage of these containers to your containers. When you write data to your containers file…

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Docker – Container

Docker Container Docker container is a running instance of an image. A container combined only libraries and settings required to make the application work. It is the lightweight and portable encapsulated environment for an application. Run Docker Container Use docker run command to launch a Docker container on your system. For example below command will create a Docker container from the hello-world image. docker run hello-world Now create a real instance of Docker container using CentOS operating system. The option -it will provide an interactive session with pseudo-TTY enabled. This…

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Docker – Images

Docker Images A Docker image is an inert, immutable, file that’s essentially a snapshot of a container. The images can be created with the build command, which can be used to create a container when started with run. List Docker Images Use docker images command to list all images available on your local system. $ docker images Search Docker Images Use docker search command to search images on docker hub. For example use following command to search available docker images for CentOS operating system. $ docker search centos Download Docker…

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Docker Tutorials

Docker Tutorials

Docker Tutorials Hey, Welcome here to the world of Containers. In this series of tutorials, you will learn about uses of Docker container, How it simplifies your development environment and make it more flexible and productive.

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