Difference between revisions of "Containers and virtual machines"

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[[Unix_and_Linux_config|Unix and Linux config]] :: [[Containers_and_virtual_machines|Containers]] :: [[Compute_clusters|Clusters]] :: &lt;link&gt;
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[[Containers_and_virtual_machines|Containers]] :: [[RTOS|RTOS Notes]] :: [[Compute_clusters|Clusters]] :: [[Unix_and_Linux_config|Unix and Linux config]]
 
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== [[#top|^]] Container Software ==
 
== [[#top|^]] Container Software ==
  
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Notes on Docker containerizing software.  Note, to get a practical start it is a good and or needed step to create a user account with Docker dot com.  Single user and free accounts with some advanced Docker features disabled are available.  A good starting tutorial for beginners is written by one Brian Hogan of Digital Ocean, this article published 2018 July 5.  First reference in list here:
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A promising starting point, collection of six articles / tutorials on Docker containers:
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*  https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-18-04
 
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*  https://www.digitalocean.com/community/tutorials/how-to-remove-docker-images-containers-and-volumes  Remove Docker image
 
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Ted noting too there may be a daily limit to the number of docker images which a user with a free account can push to Docker's image repository.  Docker's image repository provides URLs of the form <code>https://hub.docker.com/u/&lt;user_name&gt;</code>, where username is the given person's Docker account user name.
 
  
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(1) https://medium.com/sysf/docker/home
  
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Containers, Kubernetes . . .
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A general note following about three days' Docker container experimentation, and to question "should I be using a Docker container interactively, running multiple apps, some simultaneously?". <i>(Note the following forum post chain is a quagmire of issues and opinions!)</i>:
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*  https://kubernetes.io/docs/concepts/overview/what-is-kubernetes/
 
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Not a container per se but a virtual machine software:
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(2) https://news.ycombinator.com/item?id=7950326
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*  https://www.virtualbox.org/wiki/Downloads
 
  
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== [[#top|^]] Docker ==
  
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== [[#top|^]] Oracle Corporation VirtualBox software ==
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Notes on Docker containerizing software.  Note, to get a practical start it is a good and or needed step to create a user account with Docker dot com.  Single user and free accounts with some advanced Docker features disabled are available.  A good starting tutorial for beginners is written by one Brian Hogan of Digital Ocean, this article published 2018 July 5.  First reference in list here:
  
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VirtualBox on-line manual
 
 
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*  https://www.virtualbox.org/manual/ch01.html#virt-why-useful
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*  [https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-18-04 Docker on Ubuntu 18.04 LTS]
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Some important VM terms include,
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*  [https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-20-04 Docker on Ubuntu 20.04 LTS]
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*  https://www.digitalocean.com/community/tutorials/how-to-remove-docker-images-containers-and-volumes  Remove Docker image
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*  host OS  . . . the OS on which VirtualBox software runs
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2023-06-07:
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*  guest OS  . . . the OS which runs inside a VirtualBox VM instance
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*  [https://collabnix.com/how-to-fix-cannot-connect-to-the-docker-daemon-at-unix-var-run-docker-sock-error-message/ Docker cannot connect, blog by Ajeet Raina]
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*  virtual machine  . . . the hosting environment which VirtualBox creates for given guest OS
 
 
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To set up shared folders in VirtualBox instances, see VirtualBox documentation chapter 4 at the first following URL.  There are also some needed steps detailed in same Oracle documentation, chapter 2, second URL here:
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*  https://www.virtualbox.org/manual/ch04.html
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*  https://www.virtualbox.org/manual/ch02.html#externalkernelmodules
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[[File:executing-VBoxLinuxAdditions-dot-run.PNG]]
 
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To configure port forwarding, for ssh from host OS to guest OS:
 
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*  https://nsrc.org/workshops/2014/btnog/raw-attachment/wiki/Track2Agenda/ex-virtualbox-portforward-ssh.htm
 
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Where VirtualBox stores its files . . .
 
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*  https://docs.oracle.com/en/virtualization/virtualbox/6.0/admin/vboxconfigdata.html
 
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Latest revision as of 14:50, 26 January 2026


^ Container Software

A promising starting point, collection of six articles / tutorials on Docker containers:

(1) https://medium.com/sysf/docker/home

A general note following about three days' Docker container experimentation, and to question "should I be using a Docker container interactively, running multiple apps, some simultaneously?". (Note the following forum post chain is a quagmire of issues and opinions!):

(2) https://news.ycombinator.com/item?id=7950326

^ Docker

Notes on Docker containerizing software. Note, to get a practical start it is a good and or needed step to create a user account with Docker dot com. Single user and free accounts with some advanced Docker features disabled are available. A good starting tutorial for beginners is written by one Brian Hogan of Digital Ocean, this article published 2018 July 5. First reference in list here:

- - - top of page - - -

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