docker - Focused for Success, Inc.

How Do I Create a Basic Docker Container?

If you've ever worked with Docker, you'll know that creating Dockerfiles is an iterative process that is hard to debug. Developing a Dockerfile reminds me of writing Batch programs in college. It was a long time ago, don't ask. Suffice to say, writing a

linux

How Do I Perform a Netstat in a Docker Container?

A script to use /proc when netstat is missing.

docker

How Do I Setup Docker to Use Device Mapper?

Setting up Device Mapper Using https://docs.docker.com/storage/storagedriver/device-mapper-driver/#manage-devicemapper as a guide. Perform the "Configure direct-lvm mode manually" steps. The daemon.json file needs to be a little different: { "storage-driver": "devicemapper", "storage-opts"

docker

How Do I Get a List of Images on Docker Registry V2?

From: https://stackoverflow.com/questions/31251356/how-to-get-a-list-of-images-on-docker-registry-v2 I've attached a script that uses nodejs to make a nice list.

core-os

How Do I Run a Java App with a GUI in Docker?

Docker is best suited for running services vs. applications that have GUIs. However, it is possible to run applications that have X11 based GUIs on Docker using x11vnc. It is a rather complex topic. Let's start with the basics, HelloWorldSwing.java mkdir apps cat

docker

How Do I Clean Up Unused Docker Images and Containers?

These are handy commands: docker rm $(docker ps --filter exited=0 -a -q) docker rm $(docker ps --filter exited=100 -a -q) docker rm $(docker ps --filter exited=127 -a -q) docker rmi $(docker images --filter dangling=true -q) Add more later.

core-os

How Do I Keep a CoreOS Container Running Across Reboots?

Problem: When running a single Docker container in CoreOS on a DigitalOcean Droplet, occasionally CoreOS is restarted by the service. This causes the Docker container to stop, but it is not restarted. To correct this, the container must be run with the --restart always

docker

What Is The Best Source of Documentation for CoreOS Container Linux?

CoreOS is a bit confusing. In reality, most things are done using Container Linux. Therefore, to do things with CoreOS you really need the Container Linux documentation. DigitalOcean has a really good introduction to the whole concept: An Introduction to CoreOS System Components However,

docker

How Do I Login on a CoreOS Console?

Container Linux is based on CoreOS which is specifically designed to run as a cloud service infrastructure. Container Linux is almost always run on virtualized or "headless" hardware, which doesn't require access to a console. Changes to the kernel and Linux configuration

docker

How Do I Rebuild a DigitalOcean Droplet?

Useful-Things.info runs in a DigitalOcean Droplet. This site has a specific IP address which is mapped to the useful-things.info domain. Let's say I want to run a new version of Linux in the Droplet, but keep the same IP address (so I

docker

What Can I Use Digital Ocean Droplets For?

I started using Docker containers a few months ago. I must admit, initially I didn't really see the value in it. But, recently I use containers almost every day. I really started to appreciate Docker containers when I moved this site from a Godaddy

docker

Why Use Ghost in a CoreOS Droplet?

Useful-Things.info is implemented as a Ghost engine on CoreOS in a Droplet hosted by digitalocean.com. This seems rather obtuse and complicated, in fact, it's just the opposite. I've been using GoDaddy for hosting for a long time. They have a highly automated

docker

How Do I Create a Docker Container with a GUI?

Docker is really great for spinning up a quick service that normally runs on a server. It's perfect for a web service, such as a Wordpress site. But, what if you want to run a Linux desktop on your Mac or PC? You could

docker

How Do I Setup A Free Website Using Docker?

cloudhero.io is developing a Docker container service in the cloud. While it's in development, they are offering a free Docker node within which you can run containers. This is perfect for creating a small website. Beware, cloudhero.io does not guarantee your data

docker

How Do I Use Docker To Run A Linux Desktop?

Docker containers use a lot less disk and memory than VMs. Docker containers start faster and are just plain easier to manage - after you figure out how Docker images and containers actually work. (This subject is a bit involved). Normally, Docker containers serve