Keycloak

apt update
apt list --upgradable
cd /opt/
wget https://github.com/keycloak/keycloak/releases/download/12.0.3/keycloak-12.0.3.tar.gz
tar -xvzf keycloak-12.0.3.tar.gz
mv keycloak-12.0.3 keycloak

groupadd keycloak
useradd -r -g keycloak -d /opt/keycloak -s /sbin/nologin keycloak
chown -R keycloak: /opt/keycloak/
chmod o+x /opt/keycloak/bin/

mkdir /etc/keycloak
cp /opt/keycloak/docs/contrib/scripts/systemd/wildfly.conf /etc/keycloak/keycloak.conf
cp /opt/keycloak/docs/contrib/scripts/systemd/launch.sh /opt/keycloak/bin/
chown keycloak: /opt/keycloak/bin/launch.sh
nano /opt/keycloak/bin/launch.sh

#!/bin/bash

if [ "x$WILDFLY_HOME" = "x" ]; then
    WILDFLY_HOME="/opt/keycloak"
fi

if [[ "$1" == "domain" ]]; then
    $WILDFLY_HOME/bin/domain.sh -c $2 -b $3
else
    $WILDFLY_HOME/bin/standalone.sh -c $2 -b $3
fi

cp /opt/keycloak/docs/contrib/scripts/systemd/wildfly.service /etc/systemd/system/keycloak.service
nano /etc/systemd/system/keycloak.service

[Unit]
Description=The Keycloak Application Server
After=syslog.target network.target
Before=httpd.service

[Service]
Environment=LAUNCH_JBOSS_IN_BACKGROUND=1
EnvironmentFile=/etc/keycloak/keycloak.conf
User=keycloak
Group=keycloak
LimitNOFILE=102642
PIDFile=/var/run/keycloak/keycloak.pid
ExecStart=/opt/keycloak/bin/launch.sh $WILDFLY_MODE $WILDFLY_CONFIG $WILDFLY_BIND
StandardOutput=null

[Install]
WantedBy=multi-user.target

systemctl daemon-reload
systemctl enable keycloak
systemctl status keycloak
systemctl start keycloak

References

• Setup Keycloak Server on Ubuntu 18.04
• Keycloak Downloads