I have microservices architecture, I need to containerize all microservices through docker. but to host the microservices I need to incorporate the windows server image, IIS image from docker hub to run it. Now if I use every new windows server image to host my service, there will be too many windows server and IIS images which doesn't make sense. Can we have common windows server image and IIS image and we can deploy our services on top of it ? please suggest.
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I built a project (react/express) and used Docker and docker-compose to stand up my local development environment. I'm ready to deploy now and I have a Windows Server 2019 VM that is currently hosting PHP applications on IIS.
Is it possible to add Docker to my server and host my containerized application without impacting my existing IIS sites (Essentially run the container and IIS side by side)? If so, how do I bind the container/application to a URL within IIS?
I have really struggled to find Docker information on this topic.
Also, while I'm at it, will I need to pay for Docker Enterprise Edition?
Yes, you can, IIS by default will use port 80 and 443. Hence, to make it run side-by-side:
When run your docker do not mapping to port 80. docker run -p 8080:80 your_docker_handler for example. Hence you can access you IIS using http://server-ip and for docker http://server-ip:8080
or else,
You can do reverse proxy from IIS to your docker if you want to access docker without the port. But this one will need more effort and maybe some adjustment on your app code inside docker as well
I have two services, one developed in Java and the other one in nodejs. Can I deploy these on windows OS? Is it possible to deploy services in distributed mode?
Yes, you can deploy both the technologies on different containers. That's the beauty of Docker/Containerization.
Create both the images from a base image from Docker Hub and build upon the base image and create a new image. Use the new image for deployment. Upload the new image on Docker Hub and then you can pull it from Docker on any Windows OS and run it.
However, I suggest you run the containers on any Linux distribution as the container can use many a files/binaries from the host OS which will thereby reduce the resources consumed by the containers.
Is the Docker engine installed on the server to build off of the images it receives and then runs the containers that are built from it or is the engine installed on the client and then the building of images into containers is done there? Is the Docker engine installed on both the client and server and does different actions on each side?
Docker Engine is responsible for building, pulling, pushing the image and then running them as container. Docker Engine is installed on the server side and the client side just consist of the CLI used for issuing commands to Docker Engine. The Client uses Rest API to issue commands to server.
In your case both Machine A and Machine B will have Docker Engine. You will need the Docker Engine on Machine A to build the image and then push it to a repository (like Dockerhub). On Machine B you will need Docker Engine to pull the image and then create containers from it.
My application is comprised of two separate docker containers. One being a Grails based web application and second being a RESTful Python Flask application. Both docker containers are sitting on my local computer. They are not hosted on docker hub. They are proprietary and I don't want to host them publicly.
I would like to try Cloud Foundry to deploy these docker containers and see how it works. However, from the documentation I get a sense that Cloud Foundry doesn't support deploying docker containers sitting on a local machine.
Question
Is there a way to deploy docker containers sitting on a local computer to CloudFoundry? If not, what is a way to securely host the containers somewhere from CF can fetch them?
Is CloudFoundry capable of running a docker container that is a Python Flask application?
One option you have is to not use Docker images, and just push your code directly, one of the nice features of CF. PCF comes with a python buildpack which should automatically detect your Flask app.
Another option would be run your own trusted docker registry, push your images there, and then when you push your app, tell it to grab the images from your registry. If you google "cloud foundry docker registry" you get the following useful results you should check out:
https://github.com/cloudfoundry-community/docker-registry-boshrelease
http://docs.pivotal.io/pivotalcf/1-8/adminguide/docker.html#caveats
https://docs.pivotal.io/pivotalcf/1-7/opsguide/docker-registry.html
When people talk about the 'Docker Engine' do they mean both the Client and the Daemon? Or is it something else entirely?
As I see it there is a Docker Client, a Docker Daemon. The Client runs locally and connects to the Daemon which does the actual running of the containers. The Client can connect to a remote Daemon. Are these both together the Engine? thanks
The Docker Engine is the Docker Daemon running on a single host, installed with the Docker Client CLI. Here are the docs that answer this specific question.
On top of that, you can have a Swarm running that joins multiple hosts to horizontally scale and provide fault tolerance. And there are numerous other projects from Docker, like their Registry, Docker Cloud, and Universal Control Plane, that are each separate from the engine.
Docker engine is a client-server application which comprises of 3 components.
1. Client: Docker CLI or the command line window that helps us to interact.
2. REST API: Client communicate with the server with REST API, the commands issued by the client is sent to the server in the form of REST API, it is this reason our server can either be in the local or remote machine.
3. Server: Server here is either the local or remote machine or host machine which has a daemon process running in it which receives the commands and creates, manages and destroys the docker objects like images, containers, volumes etc.