command module
Version: v0.0.0-...-3447afa Latest Latest

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Published: Apr 5, 2019 License: GPL-3.0 Imports: 1 Imported by: 0



We are building a peer limiter for the fastd vpn daemon.

Getting Started

$ go get

fastd-limiter searches for a config file in /etc/fastd-limiter.yaml. An example can be found in this repository.

There are three mandatory config options: fastd_keys, gateways and metrics_url.

fastd_keys is the path to the directory that holds the fastd public keys.

gateways is a list of all gateways from which fastd-exporter metrics should be retrieved.

metrics_url is the base url for retrieving metrics. It has to include on one placeholder (%s) which is replaced with the values from gateways.

All other options are populated with sane default values. See example config for more information.


fastd-limiter has four commands: keys, limit, peers and verify. The first three are meant be called periodically. verify is supposed to be called via on verify by fastd.

./fastd-limiter [command]

keys reads all keys found into the Redis database with the configured TTL.

limit reads the prometheus metrics from all configured gateways, calculates the average peer count and stores it in the Redis database.

peers reads the local prometheus metrics and writes the locally connected peers count into the Redis database.

verify takes the public key to verify as first command line argument and checks if it is present in the Redis database and if the connected locally connected peers are below the calculated limit. If one of the two criteria is not met the application exits with a return code of 1.

./fastd-limiter verify [fastd_key]

Check out the help for additional information.

$ ./fastd-limiter --help

We are using go's internal formatting for this codebase.

$ go fmt


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