Set up pen proxy for mariadb galera

source/resources/apps/mariadb-galera/forksand-mariadb-setup

@@ -80,3 +80,54 @@ service mysql start
 
 # Maybe need on most advanced node:
 # sed -i -e 's/safe_to_bootstrap: 0/safe_to_bootstrap: 1/g' /var/lib/mysql/grastate.dat
+
+
+##########################
+# haproxy
+
+# for code.forksand.com, insert on sql1 (or any of them):
+# http://galeracluster.com/documentation-webpages/haproxy.html
+USE mysql;
+
+# This fails. Not a good way to create users either.
+CREATE USER 'haproxy'@'10.42.1.163' IDENTIFIED BY 'password';
+FLUSH PRIVILEGES;
+SHOW GRANTS FOR 'haproxy'@'10.42.1.163';
+
+
+# pen proxy instead of haproxy
+# To run manually:
+pen -l pen.log -p pen.pid localhost:3306 10.42.1.171:3306 10.42.1.172:3306 10.42.1.173:3306 10.42.1.174:3306
+
+
+useradd pen
+echo "d /var/run/pen 0755 pen pen -" > /etc/tmpfiles.d/pen.conf
+systemd-tmpfiles --create
+
+mkdir -p /etc/pen
+cat > /etc/pen/galera.cfg <<EOF
+server 0 address 10.42.1.171 port 3306
+server 2 address 10.42.1.172 port 3306
+server 3 address 10.42.1.173 port 3306
+server 4 address 10.42.1.174 port 3306
+debug 1
+EOF
+
+cat > /lib/systemd/system/pen-galera.service <<EOF
+[Unit]
+Description=Pen load balancer (galera)
+After=network.target
+
+[Service]
+User=pen
+Type=forking
+PIDFile=/var/run/pen/galera.pid
+ExecStart=/usr/bin/pen -u pen -C /var/run/pen/galera.ctl -F /etc/pen/galera.cfg -p /var/run/pen/galera.pid 127.0.0.1:3306
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+systemctl restart pen-galera
+systemctl enable pen-galera.service