Quote:
Originally Posted by bifferos
Nested KVM is cool, you shouldn't need an excuse to try it! It's interesting to see how the performance of different things degrades when stuff is nested and it's much bigger than for the one-level deep virtualisation. I used it for trying out ESXi and Proxmox, although you often have to find settings both in the guest and the host to let nesting work properly. BTW: Someone really should remake this for KVM :-). |
That was funny :-). But, linux in linux in linux? Maybe minix in BSD in linux?
Quote:
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Originally Posted by bifferos
You should never be 'tempted' to write something in Python but decide on Bash. Python is superior to Bash in pretty much every way, and unlike 10 years ago I think enough people either know Python or at least are prepared to take a shot at learning enough to hack your script if needs be. Don't get me wrong, I love Bash for init scripts, or embedded stuff, but if you're already firing up a virtual machine you're not going to be worried about the memory overhead of Python, one of the few reasons for not using it. I also think start-up time is no longer an issue as it was a decade ago.
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It's not the cpu and memory overhead. Even though I usually write much better python, since I have been using it much longer. For bigger, complex programs, yes, python is better. For even bigger ones, I prefer static typed compiled languages. It's more subtle things like this
pythonic-way-to-check-if-a-file-exists. So many answers, so many imports ... don't get me wrong, but even the simplest way
Code:
import os
import other_stuff
import even_more_stuff
if os.path.isfile(my_file):
do_something()
for file in os.listdir(dir):
do_something()
is less readable to me than
Code:
if [ -f "my_file ]; then
do_something
fi
for file in $( ls dir ); do
do_something
done
and the imports never end ... and maintaining python code is not that simple like when you start writing it, even in a virtual environment. I have so many broken virtual environments after pip upgrades. Anyway, I used to write python scripts for administrative and automation tasks. These days, I find that these kind of things are done in less lines and less time with bash rather than python. I actually have migrated some of the scripts I use at work from python to bash, less lines of code means less bugs, less problems for the users and less debugging for me.
But ... this thread is not about languages, so let's talk about vms :-) Have you tried it at all?
