Link to original README

Instalation guide

Debian-based distros(Debian, Ubuntu, Armbian etc…)

sudo apt install git golang-go jq
git clone https://github.com/Nill-R/check_rkn.git
go get github.com/zmap/go-iptree/iptree
cd check_rkn
CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o check_rkn .
sudo cp check_rkn /usr/local/bin/

For manually check

check_rkn 127.0.0.1:9999 ./

In other shell

curl -s -X POST -d '["104.31.93.48", "104.31.92.48"]' http://localhost:9999/check_ips

And look something like

{"104.31.92.48":true,"104.31.93.48":true}

It is work! Ok. Install service

sudo mkdir -p /srv/db/csv; sudo chown nobody /srv/db/csv; sudo mkdir -p /var/log/check_rkn/old; sudo chown -R nobody /var/log/check_rkn
sudo cp check_rkn.service /etc/systemd/system/
sudo cp logrotate /etc/logrotate.d/check_rkn
systemctl enable check_rkn
systemctl start check_rkn

Waiting for db downloaded and check

curl -s -X POST -d '["104.31.93.48", "104.31.92.48"]' http://localhost:9999/check_ips

Look

{"104.31.92.48":true,"104.31.93.48":true}

Well done! check_rkn work as service!