fileTun

After reading https://xeiaso.net/blog/anything-message-queue/ this entertaining post, i wanted to implement approximatly what they did in their setup.

essentially, connect two machines using a shared file.

Difference with my imlementation: actual file is needed and there is only default heartbeat.

Build

go mod tidy
go build main.go

Run

you need two linux machines with root access and two files. You want to have a left and a right machine For the left machine, you need to read from a right_output.gob and you need to write to a left_output.gob For the right machine, its the opposite. Both machines need to have access to the same file. You can use e.g. sshfs or ntfs or probably s3 or a gcp bucket

On the left machine:

mkdir testing; touch ./testing/input.gob ; touch ./testing/output.gob
sudo ./main --own_cidr 10.0.9.0/24 --own_name left --input ./testing/input.gob --output ./testing/output.gob --peer_cidr='10.0.8.0/24'

On the right machine:

mkdir testing
sshfs remote:/home/ubuntu/testing ./testing -o allow_other -o allow_root
sudo ./main --own_cidr 10.0.8.0/24 --own_name right --input ./testing/output.gob --output ./testing/input.gob --peer_cidr='10.0.9.0/24'

On both machines you should have a tun device, named left or right depending on the machine.

You could now e.g. spawn a webserver on the right machine and have it listen to :8080 with something like

mkdir httpserve ; cd httpserve
echo "it works" > index.html
python3 -m http.server 8080 --bind 10.0.8.1

and from the left machine, you should be abled to

curl 10.0.8.1:8080

You should see "it works" output as result of your curl command. As of now, this is super slow.

tail -f testing/input.gob testing/output.gob

You should see some content in both input.gob and output.gob You should also (maybe) be abled to ping or ssh anything on the remote subnet

epic development roadmap

• add tests
• [] add better tests
• [] clean things up
• [] make the cli useful and intuitive
• add different file names - paths from cli
• [] move file reading / writing into seperate file, interface
• • [] add more backends ＼(^o^)／
• • • [] add pastebin backend
• • • [] add slack or whatsapp or facebook or something like that, instagram chat, tiktok comments
• [] add more settings, config yaml and env vars
• [] figure out how to do things as non-root
• [] use context