I would like to migrate an application server to a docker container. I currently have a PXE environment which i usually use to install new server and all necessary application and content.
Is there a way to get create a docker image that boots from PXE. After the install, them commit and save the image?
Thanks
If you can install a new server with the necessary application and content then you can certainly also install docker and your image. It would look something like this:
Install docker (client/server)
Use docker load to load your image from a tar file.
You can now do docker run on your image.
To save the image to a tar file use docker save.
Related
I have a server (Linux) with no access to Internet (required) I can SSH to that server to transfer file from my local to that server.
Now I need to install Docker and docker-compose on that server. I wonder is there any install file so I can transfer to that server and run the installation or not.
Moreover, I can not run install docker image on the Docker as well. Is there anyway to load from file instead of downloading the image from the internet.
I'd like to build a NodeJS server packaged as an executable, which can then be installed and run on any Linux machine without any pre-requisite dependencies. I was considering packaging it as a Docker image, but that would mean that the user would need Docker to be installed on their system. Is there a way to package a Docker image itself as an executable, so that all the user needs to do is to run an executable file?
With docker NO
The answer for the executable from docker is no.
You can create docker/docker-compose project which you can simply run
if you have docker installed.
Without docker YES
But you can still package it without using docker (with the whole nodejs included in the executable).
Look at this link https://www.npmjs.com/package/pkg
I am working on a desktop application build using ElectronJS framework on Windows.
May be I haven't understood Docker properly, but how do I use docker for this app?
My end goal is to not let people install node, npm and electron packages on their local system. They can use the docker image to develop this application.
Update
I figured out how to package my project in docker image. Now I am struggling to run the app through the Docker Container.
How to run a GUI(Electron Application) application using docker container?
Thanks.
In your case you need custom docker images that will have node, npm and ElectronJS in it.
I found one such image on dockerhub, you can use it or build your own custom image by checking its dockerfile.
i am able to create the dockerFile where i could do the stuffs. Its like i might have 10-15 apps running for now and more to go.
my dockerFile
FROM ubuntu:16.04
RUN installing necessary softwares
The thing i am trying is installing the softwares via images too. Like for
php7.0
FROM ubuntu:16.04
FROM php:7.0-cli
RUN installing necessary softwares
So currently i am making docker file for each project and do like FROM source RUN install this and that and same thing i have to do for the rest. Lets suppose i want to change the version of php for all 10 servers. i have to open file and edit. Any good suggestion to overcome this problem?
Maybe you can use ENV variables? Like
...
ENV PHP_VERSION=7.0
RUN apt-get install php=$PHP_VERSION
...
Or maybe use templating language which is offered by tool Rocker
I am looking for a Docker image that is just some *nix flavor with NPM and Node.js installed.
This image
https://hub.docker.com/_/node/
requires that a package.json file is present, and the Docker build uses COPY to copy the package.json file over, and it also looks for a Node.js script to start when the build is run.
...I just need a container to run a shell script using this technique:
docker exec mycontainer /path/to/test.sh
Which I discovered via:
Running a script inside a docker container using shell script
I don't need a package.json file or a Node.js start script, all I want is
a container image
Node.js and NPM installed
Does anyone know if there is an a Docker image for Node.js / NPM that does not require a package.json file? Perhaps I should just use a plain old container image and just add the code to install Node myself?
Alright, I tried to make this a simple question, unfortunately nobody could provide a simple answer...until now!
Instead of using this base image:
FROM node:5-onbuild
We use this instead:
FROM node:5
I read about onbuild and could not figure out what it's about, but it adds more than I needed for my use case.
the below code is in our Dockerfile
# 1. start with this image as a base
FROM node:5
# 2. copy the script from real-life into the container (magic)
COPY script.sh /usr/src/app/
# 3. define container entry point which will run our script
ENTRYPOINT ["/bin/bash", "/usr/src/app/script.sh"]
you build the docker image like so:
docker build -t foo .
then you run the image like so, which will "run the entrypoint":
docker run -it --rm foo
The container stdout should stream to the terminal where you ran docker run which is good (am I asking too much?).