- #DOCKER RUN IMAGE AND ATTACH INSTALL#
- #DOCKER RUN IMAGE AND ATTACH SOFTWARE#
- #DOCKER RUN IMAGE AND ATTACH DOWNLOAD#
Difference between a container and image in Docker context is that in Docker the image is a read only file system and container is an encapsulated set of processes running in a read and write copy of file system. Images can share layers to optimize disk usage, transfer times and memory use. Images are made up of layers, each layer can add, change and remove files. Docker Container v/s Docker ImageĪn image is a collection of files and some metadata. So, they can be also called as light weight Virtual Machine.
In case of a virtual machine every Operating system is independent of each other whereas in Docker containers are isolated but they share an OS kernel and whenever possible they also share binary files and libraries i.e. The idea is quite similar to virtual machines although Docker is more efficient.
#DOCKER RUN IMAGE AND ATTACH SOFTWARE#
The container is then deployed and people run the software of that container. Docker helps to avoid that by placing the software tools and libraries inside a container. Usually one spends a lot of time on configuring same versions of different libraries in different devices and environments which becomes a lot costly as well as time consuming. The software relies on certain external libraries. It simply means one can run different applications on different machines or computers or ports and make them communicate efficiently.
Then it will give the content same as in index.html page, it is because we copied the index.html to the apache docker container using the Dockerfile.Docker is an open platform to build, ship and run distributed applications. To check running docker containers docker ps P = 80:80 ( binds port 80 of the running host to the TCP port 80 (apache) on the container.ĭ = Run container in the background and print the container ID Run the container from the docker image docker run -d -p 80:80 apache:centosĪpache= image name:tag (you can also use image id) ServerAlias ErrorLog "/var/log/httpd/error_log"ĬustomLog "/var/log/httpd/access_log" combinedīuild the docker image docker build -t apache:centos.
#DOCKER RUN IMAGE AND ATTACH DOWNLOAD#
ADD instruction can download files via HTTP and copy it into the docker image.ĬMD –> Command specifies the command line command to be executed when a docker container is started up based on a docker image created from the Dockerfile.Ĭreate an index.html with test Content vim index.htmlĬreate an Apache default conf as nf vim nf ADD instruction can copy and extract tar files from the docker host( Dockerfile creating host) to the docker image.Ģ. WORKDIR –> It is the working directory of the docker imageĮNV –> To set environment variable inside the docker imageĬOPY –> It is used to copy the files from the host (on which we create the Dockerfile) to the docker image.ĪDD –> It is same as the COPY command but there is two difference from COPY command ġ. MAINTAINER –> Information about who is maintaining the Dockerfile RUN –> It is used to execute the command within the image RUN chown -R apache:apache /var/įROM –> Create a layer from the alpine:latest image Systemctl start docker docker-distributionĬreate Dockerfile for apache and open it mkdir -p dockerapacheĪdd the below content to the Docker File and Save the File #
#DOCKER RUN IMAGE AND ATTACH INSTALL#
Install Docker on Centos 7 yum install docker docker-distribution Run and Deploy Apache Docker Images in Centos 7 If you face any issues or got stuck with the process, kindly contact our experienced team to resolve it. This blog will show the steps to create an Apache Docker image and deploy it. The containers can communicate with each other through proper channels Docker is an opensource virtualization tool in which users can create, run, and deploy applications or software in packages called containers.
Apache does support almost all operating systems worldwide. Apache is an opensource web server that is commonly used for webpage deployments.
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