A side note: the page does not declare utf-8 encoding. I have manually change it to resolve some of garbled text.
Out of curiosity, which browser are you using?
Building a Linux Container Using Namespaces: Part – 1 (2020)
11–20 of 24 posts
Re: Building a Linux Container Using Namespaces: Part – 1 (2020)
#12A side note: the page does not declare utf-8 encoding. I have manually change it to resolve some of garbled text.
Out of curiosity, which browser are you using?
Google Chrome
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36
Re: Building a Linux Container Using Namespaces: Part – 1 (2020)
#13See also: * The What, Why and How of Containers ( https://www.annwan.me/computers/what-why-how-containers/ ) * Containers from Scratch ( https://ericchiang.github.io/post/containers-from-scratch/ ) * Linux Containers From Scratch in C ( https://www.lucavall.in/blog/barco-linux-containers-from-scr... ) * Life of a Container ( https://indradhanush.github.io/blog/life-of-a-container/ )
thank you very much was looking for more good resources
Re: Building a Linux Container Using Namespaces: Part – 1 (2020)
#14I guess cgroups come as version 2
https://www.redhat.com/en/blog/world-domination-cgroups-rhel...
Re: Building a Linux Container Using Namespaces: Part – 1 (2020)
#15If you were looking to create testing for networking, i.e., simulating network dropouts for a client-server connections, is this something that you can use namespaces for, or would virtual machines be more fit for purpose?
Re: Building a Linux Container Using Namespaces: Part – 1 (2020)
#16You can get a sort of "reader's digest" version of this by having a look at "bocker". It's about 120 lines of bash that implements the important bits of docker using nsenter, btrfs, cgcreate, etc.
Re: Building a Linux Container Using Namespaces: Part – 1 (2020)
#17If you were looking to create testing for networking, i.e., simulating network dropouts for a client-server connections, is this something that you can use namespaces for, or would virtual machines be more fit for purpose?
It may be both.
You could possibly just use network namespaces.
While I am too familiar with it to suggest effort required, looking at the Openstack project and how they provision tenant networks may help.
It is just python with a three tier model with a message bus. But how they interface with libvirt may help if the namespace abstraction support for the 'ip' command is too clunky for you.
It doesn't give you independent stacks and openvswitch will let you build almost anything you would need.
Re: Building a Linux Container Using Namespaces: Part – 1 (2020)
#18Based on Ubuntu 18.04, which is pretty old now. Are there any relevant changes for 22.04 or 24.04 or is this stuff stable now?
Yes this looks like it is using cgroups v1 and v2 does changes things up enough that its not a great guide.
Re: Building a Linux Container Using Namespaces: Part – 1 (2020)
#19This looks to be using cgroups v1 and should be updated to v2 as its not directly compatible and would improve things understanding wise.
Re: Building a Linux Container Using Namespaces: Part – 1 (2020)
#20If you were looking to create testing for networking, i.e., simulating network dropouts for a client-server connections, is this something that you can use namespaces for, or would virtual machines be more fit for purpose?
Look up tc, the traffic control utility that interacts with the Kernel's packet scheduler using the netfilter framework.