Docker is an opensource tool used for virtualization and deliver software in the form of packages called Containers. It is one of the most important tools used in networking domain. Dockerfile is a template for building the image which contains commands needed to package the software. In this post, I am going to explain the commands ADD & COPY used in Dockerfile . ADD Command: ADD command is used to copy files, directories or files from remote URLS to destination path in the image. The source paths can contain wildcards. If the destination has relative path, it is relative to the Working directory of the image. Note that source path is always relative to the Docker build context. ADD command will not support authentication. So, if there are any protected files to be added in Dockerfile building, use other tools like curl or wget Dockerfile copying Single & Multiple files, directory using ADD inst...
Docker is an opensource tool used for virtualization and deliver software in the form of packages called Containers. It is one of the most important tools used in networking domain. Dockerfile is a template for building the image which contains commands needed to package the software. In this post, I am going to explain the commands WORKDIR & HEALTHCHECK used in Dockerfile . WORKDIR Command: WORKDIR command is used to set the directory of the image on which the commands like RUN, COPY, ADD, ENTRYPOINT, CMD operates. The command usage is WORKDIR < Path_To_Dir >. If the directory not exists, it will be created. If the relative path is given to WORKDIR, that path will be relative to the previous WORKDIR command’s path. In Ubuntu, by default the WORKDIR will be / . Please find the below sample Dockerfile to get clear picture of WORKDIR command: FROM ubuntu: 16.04 WORKDIR /root ...