Skip to main content

Docker: The Whale's Stuck


Docker 1.2 - Words Mean Things

Images - The blueprints, make up the basis of containers. [docker pull to get Busybox]
Containers - Made from images to run the application [docker run of Busybox image]
Daemon - Background service managing running, building, distributing docker containers
Client - The Command Line that talks to the daemon, though it can be a GUI. I prefer cmd line.
Hub - Registry - Directory - of images.

2.0 - How to Run A Static Website

  1. Pull image from Hub
  2. Run Container
  3. See how to run a webserver
Well, mission (sort of) accomplished!



Use a site already hosted on a registry for this demon.

Locally, it’s not here. So we have to get it from the registry and run it.

Nginx is running… - That’s good!



But there are more commands we have to put in - and as you can see, my prompt (Morganwarss-MacBook-Air:~ morganwars$) is gone.

Yet, somehow…

It works? And my Wifi is off, so it really is using a local port.




Well, let’s make our own Image. Remember how we did it with Busybox?

We can pull specific versions of images, if you don’t provide specifics, Docker will get the latest version - and you may not want that.

And images go even further than that!

Base Image - No parent images, usually with an OS.
Child Images - Build upon base images, add additional functionality.

Official images - Supported by the people at Docker, usually one word (or phrase) long.

User images - Made by us! Formatted by user/image-name

I’m still iffy on how to move about containers.

Anyway, we clone the prakhar1989/docker-curriculum repository and change directory to one about a flask-app. This application is written in Python.

the onbuild version of things does the boring stuff to get an app running.

And the python:3-onbuild app isn’t found, so I think we’re going back to the drawing board with this demo.

Comments

Popular posts from this blog

Making KPI Dashboards with PowerBI

 While this is the free tier, I cannot share or collaborate with others, nor can I publish content to other people's workspaces, but they will not stop me from screenshooting and recording these self-taught adventures,so! I'm doing this because I idly searched "Mattel careers" and "Information Technology", and seeing a bulletpoint saying the following: Analytical and reporting skills such as creating dashboards and establishing KPIs such as experience with PowerBI, Cognos, Tableau, and Google Data Lake/AWS is preferred And thought "Well, I've used Tableau, and I've heard about PowerBI,  even if its in-demandness is questionable , so how similar is it? And can I write about it?"  First, PowerBI (PIB) does have a downloadable, local version, but apparently Windows-only. I could download the .exe but I couldn't run it / drag it to applications on my MacBook.  Not a problem, we'll use the online SaaS version, and a dataset found here, ...

Connecting IoT Devices to a Registration Server (Packet Tracer, Cisco)

 If you're seeing this post, I'm helping you, and you probably have LI presence: React and share this post to help me in return.   In Packet Tracer, a demo software made by Cisco Systems. It certainly has changed a lot since 2016. It's almost an Olympic feat to even get started with it now, but it does look snazzy. This is for the new CCNA, that integrates, among other things, IoT and Automation, which I've worked on here before. Instructions here . I don't know if this is an aspect of "Let's make sure people are paying attention and not simply following blindly", or an oversight - The instructions indicate a Meraki Server, when a regular one is the working option here. I have to enable the IoT service on this server. Also, we assign the server an IPv4 address from a DHCP pool instead of giving it a static one. For something that handles our IoT business, perhaps that's safer; Getting a new IPv4 address every week or so is a minimal step against an...

AWS Infrastructure Composer

 A very brief look. The text says; Drag and drop any CloudFormation resource on a visual canvas Connect and configure enhanced components to automatically build IaC for an application architecture Seamlessly transition between authoring workflows visually with Step Functions Workflow Studio and defining resources with Infrastructure Composer Integrate your browser with your project through “local sync” or use Composer in the AWS Toolkit for Visual Studio Code In 2019 there was a similar tool to build infrastructure that would be converted to code. Nice to know they bought it back. When you enter the Composer, it's a blank space with a background reminiscent to the screen for Cloud Formation. Infrastructure Objects are to the left in a drawer;  I've selected a bucket that I can rename. I went to connect a bucket to a Dynamo DB Table, and it's not available yet. It also lost a bucket somewhere in the ether of the GUI. Ah well. I couldn't find the EC2 instance in the...