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Update .md file #75

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Modified Dockerfile_Instructions.md file
8binny5 Feb 24, 2023
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Modified Dockerfile_Instructions.md file
8binny5 Feb 24, 2023
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Update Dockerfile_Instructions.md
8binny5 Feb 24, 2023
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42 changes: 41 additions & 1 deletion Docker/Dockerfile_Instructions.md
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Expand Up @@ -76,4 +76,44 @@ DockerFile

- `SHELL` - The SHELL instruction allows the default shell used for the shell form of commands to be overridden.


- ************************************************************************************************************************

- Dockerfile Instructions:

- FROM:
- RUN:
- CMD:
- ENTRYPOINT:
- WORKDIR:
- COPY:
- ADD:
- EXPOSE:
- ENV:

{ Using the steps in the above dockerfile, we will need to Install tomcat on Centos}:
- FROM: Pull centos from dockerhub
- RUN: Install java
- RUN: Create /opt/tomcat directory
- WORKDIR: Change work directory to /opt/tomcat
- ADD/RUN: Download tomcat packages (If you use RUN then you have to use wget command) and if we ADD then we can just use link address and specify location to copy mostly current directory.
- RUN: Extract tar.gz file
- RUN: Rename to tomcat directory
- EXPOSE: Tell to Docker that it runs on port 8080
- CMD: Start tomcat services

{
{Please make sure you pay Special attention to the version on ADD apache-tomcat version, RUN tar -xvzf and RUN mv}
- FROM centos:latest
- RUN cd /etc/yum.repos.d/
- RUN sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
- RUN sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
- RUN yum install java -y
- RUN mkdir /opt/tomcat
- WORKDIR /opt/tomcat
- ADD https://dlcdn.apache.org/tomcat/tomcat-9/v9.0.70/bin/apache-tomcat-9.0.70.tar.gz .
- RUN tar -xvzf apache-tomcat-9.0.70.tar.gz
- RUN mv apache-tomcat-9.0.70 /opt/tomcat
- EXPOSE 8080
- CMD ["/opt/tomcat/bin/catalina.sh", "run"]
}
}