forked from Deuxfleurs/mknet
Create a test network using network namespaces and tc-netem
analysis | ||
artifacts | ||
benchmarks | ||
scenarios | ||
topo | ||
.gitignore | ||
.gitmodules | ||
LICENSE | ||
mknet | ||
net.py | ||
prepare.py | ||
README.md | ||
setup.py | ||
shell.nix |
mknet
mknet is a tool to simulate various network topologies locally thanks to network namespaces and traffic control (tc).
Prepare your environment
Get the repository:
git clone https://git.deuxfleurs.fr/Deuxfleurs/mknet.git
cd mknet
Run our configuration script:
./prepare.py
Now, you are ready to launch an experiment:
sudo -i
source .venv/bin/activate
./mknet scenario ./topo/50ms.yml ./scenarios/garage-s3lat garage-v0.8
If a script crash, you must manually destroy the topology:
./mknet destroy
Topologies
All topologies:
./topo/dc.yml
- A 3 node topology connected with a 1Gbit/s link and a 1ms latency./topo/with-vdsl.yml
- A topology mixing datacenters with fast internal connectivity and an isolated VDSL node./topo/50ms.yml
- An artifical topology simulating nodes with high bandwidth but with a fixed 50ms latency, useful to quantify the impact of latency on a distributed software./topo/multi-dc.yml
- Simulate 3 DC interconnected with 50ms latency WAN network and close to zero latency inside the DC./topo/{1,5,10,50,100}mbps.yml
- Simulate 3 nodes interconnected with a bandwidth bottleneck.
Feel free to write new topologies!
Scenarios
All scenarios:
./scenarios/garage-s3lat [garage-v0.7|garage-v0.8]
- Run s3lat on Garage./scenarios/garage-concurrent [garage-v0.7|garage-v0.8]
- Run s3concurrent on Garage./scenarios/garage-warp [garage-v0.7|garage-v0.8] [default|fast]
- Run warp on Garage. 2 flavors are available: fast and default.
Scenarios take optional flavors as input that modulate their behavioir. Passing them is not mandatory, a default one will be selected for you.
How to run them:
./mknet scenario <topology> <scenario> [flavors...]
./mknet scenario ./topo/50ms.yml ./scenarios/garage-s3lat garage-v0.8
How to write good scenarios:
- If a scenario can be run with multiple different parameters, write one scenario with multiple flavors
- If the logic ran is different, write a new scenario
- A scenario code must remain short and looks like a DSL, abstract the logic in the
fragments/
module
Manual usage
./mknet create ./topo/with-vdsl.yml
./mknet run-all ./scenarios/garage-manual
./mknet run dc1:dc1s1 /tmp/mknet-bin/garage* -c /tmp/mknet-store/garage/dc1/dc1s1/garage.toml status
./mknet run-all ./scenarios/clean
./mknet destroy