This script was built for SteemDNS, a decentralized DNS system running on the Steem Blockchain.
Created by @Someguy123 (Steemit Link) or Someguy123 on Github.
At the current point in time, some of these commands are not working. The most important commands work, which are rescan_users, scan_user, store_domain, and watch_chain.
Usage: python3 cmd.py [cmd] [args]
Commands:
store_domain domain records(JSON) - Add a domain manually
rescan_since blknumber - Rescan everything after this block
rescan_users - Rescan all users
scan_user username addtodb(BOOL) - Scans a user and returns their metadata. Can add to DB too
watch_chain - Monitors the blockchain and adds to db
GNU Affero GPL - check LICENSE for more information.
tl;dr; - if you make any changes to this project, you need to contribute them back, even if you don't redistribute the code in any format, and are expected to inform people using your DNS service that the code was taken from here.
The SteemDNS script depends on Python 3, and the Piston python API.
Install PowerDNS (stable, NOT MASTER): PowerDNS Repo Site
Install the gsqlite3 backend for PowerDNS (it will be in your repos after you set up the powerdns repo)
If you're using Ubuntu 16.04 the instructions are as follows:
sudo su
echo "deb http://repo.powerdns.com/ubuntu xenial-rec-40 main" > /etc/apt/preferences.d/pdns.list
echo -e "Package: pdns-*\nPin: origin repo.powerdns.com\nPin-Priority: 600" > /etc/apt/preferences.d/pdns
curl https://repo.powerdns.com/FD380FBB-pub.asc | apt-key add -
apt update && apt install pdns-recursor pdns-backend-sqlite3
Edit /etc/powerdns/pdns.conf and add the following under where the existing launch= is (replace it).
launch=gsqlite3
gsqlite3-database=/var/spool/powerdns/steem.sqlite
You may want to add a recursive resolver (this allows you to resolve non-steem domains like google.com):
recursor=8.8.4.4
Simply run the following command to install dependencies:
pip3 install -r requirements.txt
Create a DB using
sudo touch /var/spool/powerdns/steem.sqlite
sudo sqlite3 /var/spool/powerdns/steem.sqlite < schema.sql
# to allow access by different users, i.e. the one running the watcher
sudo chmod 777 /var/spool/powerdns/steem.sqlite
You'll need to configure the nameserver domain (which is a domain you own that points at your server), and SOA in the python file:
NAMESERVERS = ['ns1.example.com']
SOA = 'ns1.example.com dns-admin.example.com 0'
If you're running this locally, and aren't going to be publishing your DNS, you can set all domains to localhost. Leave the '0' at the end of the SOA. That tells PowerDNS to automatically detect when a domain changes and adjust the value automatically.
Now re-scan all users (may take a long time!)
python3 cmd.py rescan_users
Once it's re-scanned, you can now run the watcher command. Run this in screen to prevent it from closing when you disconnect.
screen -S steemwatchchain python3 cmd.py watch_chain
You can inspect the sqlite database by running sqlite3 /var/spool/powerdns/steem.sqlite. To verify if your DNS is working, just run on the server:
dig a someguy123.steem @127.0.0.1
If this is public, remember to verify the outside can see it too!
At this point you should be good to go. Keep an eye on the steem watch script in-case it crashes (though it should be reliable), you may want to test it by publishing your own DNS records to your json_metadata.