CODEWITHSUNDEEP
dockerdockerfilerhel
user2777473
user2777473

Reputation: 3826

Docker image just contain software without OS

I have a PROD environment running on RHEL 7 server. I want to use docker for deployment. I want to package all the software and apps in a Docker image, without a base OS. Because I don't want to add an additional layer on top of RHEL. Also, I could not find an official base image for RHEL. Is that possible?

I see some old posts mentioned about "FROM scratch" but looks it does not work in the latest version of Docker -- 1.12.5.

If this is impossible, any suggestions for this?

Upvotes: 3

Views: 1812

Answers (1)

Eugen Mayer
Eugen Mayer

Reputation: 9906

Docker is designed to also abstract the OS dependencies - that is what it has been build for. Beside it also encapsulates the runtime, memory and things, it specifically is used as a extreme-better variant of chroot ( lets say chroot on ultra-steroids ).

It seems like you neither want the runtime seperation nor the OS layer seperation ( dependencies ) - thus docker makes absolutely no sense for you.

Deploying with docker the is not "simple" or simpler as using other tools. You can use capistrano or, probably something like https://www.habitat.sh/ which actually does not require a software to be bundled in docker containers to be "deployable", it also works on barebones and uses its own packaging format. Thus you have a state-of-the-art deployment solution, and with habitat, you can later even upgrade using docker-containers.

Upvotes: 1

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