[Guide] Setup Feathercoin Electrum-X Server Centos 7

AcidD

Hey Guys,

This guide has been adapted from guide @lclc_ wrote for Ubuntu here:
https://forum.feathercoin.com/topic/9626/guide-setup-an-electrumx-feathercoin-server

This guide assumes you are running a full node already, if you need to get a full node setup on Centos 7 Please follow the guide I wrote here:
https://forum.feathercoin.com/topic/8392/guide-create-a-full-node-and-build-feathercoin-v0-16-on-centos-7/7

I also assume you have another user besides root, for this guide I use the user “electrumx”

Install Firewalld + Fail2Ban

yum -y install epel-release
yum -y install firewalld fail2ban-firewalld

Configure fail2ban

The configuration files for fail2ban are stored in /etc/fail2ban/. In order to avoid problems when updating fail2ban, lets add our local changes to a jail_ssh.local file located in that directory. Open a new text file /etc/fail2ban/jail_ssh.local using an editor you are comfortable with.

sudo vi /etc/fail2ban/jail_ssh.local

Paste the following two lines into the file and save it.

[sshd]
enabled = true

Start up the fail2ban.service using systemctl.

sudo systemctl start fail2ban.service

sudo systemctl enable fail2ban.service

ElectrumX-Server

Start by grabbing the source files from git

cd /usr/src
git clone https://github.com/kyuupichan/electrumx.git
cd electrumx

Dependencies

sudo yum -y update
sudo yum -y install yum-utils
sudo yum -y groupinstall development
sudo yum install -y https://centos7.iuscommunity.org/ius-release.rpm

sudo yum -y install python36u python36u-devel leveldb-devel python36u-pip python36u-setuptools
sudo pip3.6 install --upgrade pip
sudo pip3.6 install plyvel

Install electrum-x server

sudo python3.6 setup.py install

Make a db folder for your electrum-x server

mkdir -p /home/electrumx/.electrumx/db

Create an SSL certificate for Electrum-X to use

openssl genrsa -des3 -passout pass:x -out server.pass.key 2048
openssl rsa -passin pass:x -in server.pass.key -out /home/electrumx/.electrumx/server.key

rm server.pass.key

Don’t set a password in the next step !

openssl req -new -key /home/electrumx/.electrumx/server.key -out /home/electrumx/.electrumx/server.csr

openssl x509 -req -days 1825 -in /home/electrumx/.electrumx/server.csr -signkey /home/electrumx/.electrumx/server.key -out /home/electrumx/.electrumx/server.crt

Create Banner File for Elexctrum-X Server

Edit the below and then paste into your console/terminal, (adjust as needed) :

cat << EOT > /home/electrumx/.electrumx/banner_file.txt

**** Feathercoin.Network - Hosted for the community ****

Feathercoin Version: \$DAEMON_VERSION
Feathercoin Subversion: \$DAEMON_SUBVERSION

ElectrumX Server Version: \$SERVER_VERSION
ElectrumX Server Subversion: \$SERVER_SUBVERSION

EOT

Create electrumx config

Create the following file and be sure to edit the below info with your own details.
DAEMON_URL = make sure you put your own rpc username/password
DONATION_ADDRESS = make sure you put your own donation addresss
REPORT_HOST = the public domain name you’re going to use (eg. Electrum.Feathercoin.com)

cat << EOT > /home/electrumx/.electrumx/electrumx.conf
COIN = Feathercoin
DB_DIRECTORY = /home/electrumx/.electrumx/db
DAEMON_URL = http://YourFeathercoinRPCUser:YourFeathercoinRPCPassword@127.0.0.1
NET = mainnet
DB_ENGINE = leveldb
HOST = 
TCP_PORT = 50001
SSL_PORT = 50002
SSL_CERTFILE=/home/electrumx/.electrumx/server.crt
SSL_KEYFILE=/home/electrumx/.electrumx/server.key
BANNER_FILE = /home/electrumx/.electrumx/banner_file.txt
DONATION_ADDRESS = YourDonationAddressHere
REPORT_HOST = ElectrumX.YourDomainName.com
EOT

Setup systemd file (auto-start on boot & auto-restart)

Create the following file:

sudo bash -c " cat << EOT > /etc/systemd/system/electrumx.service
[Unit]
Description=Electrumx
After=network.target

[Service]
User=electrumx
Group=electrumx

EnvironmentFile=/home/electrumx/.electrumx/electrumx.conf
ExecStart=/usr/bin/electrumx_server.py
LimitNOFILE=8192
TimeoutStopSec=30min

[Install]
WantedBy=multi-user.target
EOT"

Install systemd script

sudo systemctl daemon-reload

Start systemd service

sudo systemctl start electrumx.service

Enable autostart on boot for systemd service

sudo systemctl enable electrumx.service

Check systemd service is running fine

sudo systemctl status electrumx.service
sudo journalctl -u electrumx -f

Watch the DB sync process and check for errors

sudo tail -f -n 50 /var/log/messages

Open Ports for Electrum-X Server

sudo firewall-cmd --zone=public --add-port=50001/tcp --permanent
sudo firewall-cmd --zone=public --add-port=50002/tcp --permanent

sudo firewall-cmd --reload
sudo firewall-cmd --list-all

I hope this helps someone.

Credit to @lclc_ for most of the steps :-)

lclc_

Nice! Thanks for the guide.

I already see one more new ElectrumX server in my client: electrumx-us-1.realbotlife.com

I guess it’s from @peschu ? :)

peschu

@lclc_ said in [[Guide] Setup Feathercoin Electrum-X Server Centos 7]

I guess it’s from @peschu ? :)

Yes! :) I used the naming convention of feathercoin servers. the datacenter is located in the us…looks a bit more international ;-)

lclc_

@peschu very nice. Thanks for supporting the network, providing more choice and making Feathercoin more decentralized with that :)

AcidD

This guide works perfectly on a $5/mo Digital Ocean Droplet. it’s fantastic and cheap and a great way to support the network as you run a full node plus electrumx!

one note, building Feathercoin Core 0.16 on the small droplet, you usually run out of memory during the build

run the below to increase swap.

free
dd if=/dev/zero of=/var/swap.img bs=1024k count=1000
mkswap /var/swap.img
swapon /var/swap.img
free
make -f makefile.unix