hey I am new to docker and I want to deploy my tomcat application on cloud run , so I need to choose an image which is slim and my second question is do I need to install Java or jdk with it if I choose
tomcat:9-slim
You can explore the container content. For instance, go to that page and you can see that openjdk-11 is installed. No need to install another version (expect if you need a more recent version.
Related
I'm currently building a Docker container that contains all the libraries needed for deployment of our app on a test machine, such as, for example, OpenCV 3.3 built with CUDA 9.
So, on a clean minimal OS install we can download the container and fire up our app in the desired environment, which is as I understand it one of the main reasons to use Docker.
So, after a while we decide to do our tests on the bare metal without the Docker file system, etc, in the way. Can we somehow replay the Dockerfile commands or image command history to run the apt-get, etc of not just the current package, but all FROM packages that are not yet installed on the raw environment?
I have a pod in which i have image ubuntu desktop i connect to this image via xrdp what i want to do is to add eclipse image to this pod in other words when i connect to this ubuntu desktop i can find eclipse.
I am going to create platform based on kubernetes with image catalog.
For example a profesor of java want only ubuntu desktop and eclipse. He gonna choose from catalog ubuntu and eclipse all backend i will do it myself.
So when a student connect he will find eclipse on ubuntu desktop.
You have to create an image from a dockerfile recipe that includes a command for installing the eclipse package.
Then you can use your own image for the deployment into the cluster (instead of the ubuntu image you are using today).
Please read up how to create a docker container and dockerfile documentation.
You can also take a look at an example dockerfile.
I have existing MEAN stack application. I found more tutorials, but I cannot find anything about deploying existing app to Docker. Is this possible?
As long as you can get the sources of your project on your deployment platform (the Ubuntu server), you can then follow the guide "Dockerizing a Node.js web app".
It shows how to create a simple web application in Node.js, then build a Docker image for that application, and lastly run the image as a container.
You can see a more complete example at Semaphore.
Are there any tools to install/deploy a docker image as a standalone/portable installation.
So that you don't have to install docker manually beforehand, just one installation, and it will run and deploy your docker image. And perhaps autostart it as well on boot.
Mainly interested for Win&OSX, but for linux would be nice too.
You can get a standalone Docker image automatically with preconfigured scaling options using the already packaged Docker engine. The details of this solution and its installation are described in the instruction.
I don't think that this is even possible. Docker has so many dependencies.
(Linux &/ OSX)
The much easier way would be a bash script wich starts the installation and afterwards runs the container. Shouldn't be that time consuming.
I have searched the history a little bit but failed to find a good answer. So I just asked my question here. If there is a good answer already, please redirect it for me. Thanks.
The question is, I found my company's new hire doc lists a bunch of software to install to setup the development environment. Usually it took 1 or 2 days for a new hire to setup everything ready for a new mac. We want to shorten that process. The first thing I thought is Docker.
I read through the user guide of Docker and followed some blogs regarding to how to setup dev environment using Docker but still a little confused if Docker applies to our setting. So here's the detail of requirements:
We need to install a bunch of software (many of them are customized binaries). Right now, we distribute the source code, a new hire need to build from the source code, install it and set environment to include the binary into path. I am wondering if Docker allows us to install customized binaries into it's container?
The source code should not stay in the container. The source code is still checked out in one's local machine using git. Then, how can I rely on the Docker container's environment to build my software? I have searched a little bit is that, you need to mount your folder into the container, and then shell into your container to build? Is that how it works?
We usually develop in mac, does Docker also support mac container or it just allows you to run Linux container using boot2Docker?
Thank you so much in advance for your help.
Some answers :)
First, I think it's a really good idea to use Docker to standardise the development configuration (softwares, custom packages, env variables, ...).
With Docker, you can get your customised binaries from the host, it's not a problem. With the CMD command, you can use bash to install them and add them into your PATH. You can also write a shell script to install all your stuff and launch this script when you build your container
Your code will be on the host and you can "mount" a host folder in your docker image with the -v command. Ex: docker run -v /home/user/code:/tmp/code your_image. I'll detail below how the developer will use your Docker image.
Yep, you have to use Boot2Docker, it works well
Once your development image will be ready, you have to publish it on the official Docker registry (or to host a local registry on your network).
Next, the developer will launch the following Docker command:
docker run -rm -ti your_build_image /bin/bash
This will launch a bash terminal in your Docker image and the developer will be able to compile the code. Ex: cd /tmp/code + mvn clean install
Please have a look to this article to learn about volumes: http://jam.sg/blog/mongodb-docker-part-2/
And this one about Dockerfile: https://www.digitalocean.com/community/tutorials/docker-explained-using-dockerfiles-to-automate-building-of-images
You can also find a lot of Dockerfiles on github (search Dockerfile).
If the goal is to speed up the time it takes to get a Mac setup and usable in your environment, you might want to look at Boxen.
From the "About" section:
"Boxen is your team's IT robot. It's a dangerously opinionated framework that automates every piece of your development environment. GitHub, Inc. wrote the first version of Boxen (imaginatively called “The Setup”) to help employees start shipping on day one."