Difference between revisions of "Containers and virtual machines"

Revision as of 16:40, 4 June 2021

^ Container Software

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:

• https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-18-04
• https://www.digitalocean.com/community/tutorials/how-to-remove-docker-images-containers-and-volumes Remove Docker image

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 https://hub.docker.com/u/<user_name>, where username is the given person's Docker account user name.

Containers, Kubernetes . . .

• https://kubernetes.io/docs/concepts/overview/what-is-kubernetes/

Not a container per se but a virtual machine software:

• https://www.virtualbox.org/wiki/Downloads

^ Oracle Corporation VirtualBox software

VirtualBox on-line manual

• https://www.virtualbox.org/manual/ch01.html#virt-why-useful
Some important VM terms include,
• host OS . . . the OS on which VirtualBox software runs
• guest OS . . . the OS which runs inside a VirtualBox VM instance
• virtual machine . . . the hosting environment which VirtualBox creates for given guest OS

To set up shared folders in VirtualBox instances:

• https://www.virtualbox.org/manual/ch04.html

To configure port forwarding, for ssh from host OS to guest OS:

• https://nsrc.org/workshops/2014/btnog/raw-attachment/wiki/Track2Agenda/ex-virtualbox-portforward-ssh.htm

Where VirtualBox stores its files . . .

• https://docs.oracle.com/en/virtualization/virtualbox/6.0/admin/vboxconfigdata.html