* Install correctly on Ubuntu 20.04
Main changes are to avoid pulling in python2 by mistake, and then to make sure to install only python3 packages.
Also: Add net-tools which is needed to get ifconfig on newer Ubuntu releases.
(admin note: there are still a couple of remaining 20.04 issues but this is helpful)
Ubuntu 16.04 no longer includes a 'python' executable.
If none of {$PYTHON,python,python2,python3} are usable, we advise
the user to either set PYTHON or install a usable python.
The submodules have submodules with authenticated URLs which breaks anonymous,
automated builds. Excluding them also decreases build time.
git -C is not available in git 1.8 (CentOS 7)
It's a bad idea for all Mininet VMs to share the same SSH keys.
Certainly users can regenerate their own keys, but it's better
if we don't ship a key and simply regenerate it on boot.
Unfortunately disabling IPv6 via sysctl doesn't actually
disable it on all of the interfaces by default. Disabling
it via grub disables it entirely in the VM.
Helps with #454
Apparently there is a conflict where the lua plugin
conflicts with the built-in dissector for openflow
that is included with 1.12 and up. For now, we will
just not install the plugin. This should fix the
14.10 VM build.
Additionally, I have added a handy function,
version_ge, which compares version numbers in
canonical x.y.z format. Thanks to stackoverflow for
pointing out the incredibly useful sort -V option!
The older wireshark dissectors were not well-maintained
and were a pain to build. They also added tons of extra junk
into our VM images! The ones built into the current
wireshark are deficient for 1.3. The solution for the
future is almost certainly to go with the lua-based plugin,
since it is architecture-independent and should be much
easier to maintain and upgrade.
This argument expect a parameter which is the version number of OVS you wish to install.
install.sh -V 2.0.0
What is nice that I tested, is that you can keep running the above to change
which OVS version you want to test with. Also, if a new version of OVS
is released, just run the above again specifying the new version number.
The version number must match the version number in the tarball file name
like openvswitch-2.0.0.tar.gz. In this case, the version specified
must be 2.0.0.