[ Miroslav Strugarevic @ 29.06.2012. 21:13 ] @
Instalacija i konfiguracija LVS (Linux Virtual Server) na CentOS Linux 6 1. Instalacija CentOS Linux-a na serverima - Podešavanje servera 2. Instalacija LVS managera - Instalacija LVS managera - Kreiranje konfiguracije - Dodavanje servisa u startup 3. Demonstracija - Startovanje LVS managera - Monitoring LVS-a - Otkazivanje jednog od web servera - Vraćanje web servera u konfiguraciju 4. Pitanja, predlozi, ispravke? 1. Instalacija CentOS Linux-a na serverima Ugasite SELinux (www1, www2, lvs) sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config Potrebno je uključiti IP forwarding (lvs) sed -i 's/net.ipv4.ip_forward = 0/net.ipv4.ip_forward = 1/g' /etc/sysctl.conf Potrebno je ugasiti ARP zahteve (www1, www2) echo "net.ipv4.conf.all.arp_ignore = 1" >> /etc/sysctl.conf echo "net.ipv4.conf.all.arp_announce = 2" >> /etc/sysctl.conf echo "net.ipv4.conf.eth0.arp_ignore = 1" >> /etc/sysctl.conf echo "net.ipv4.conf.eth0.arp_announce = 2" >> /etc/sysctl.conf Podesite /etc/hosts fajl (www1, www2, lvs) echo "192.168.0.110 lvs.example.com" >> /etc/hosts echo "192.168.0.111 www1.example.com" >> /etc/hosts echo "192.168.0.112 www2.example.com" >> /etc/hosts echo "192.168.0.222 www.example.com" >> /etc/hosts Dodavanje virtuelne IP adrese (lvs) echo "ifconfig eth0:0 192.168.0.222 netmask 255.255.255.0" >> /etc/rc.local Dodavanje virtuelne IP adrese (www1, www2) echo "ifconfig lo:0 192.168.0.222 netmask 255.255.255.255" >> /etc/rc.local Ugasite nepotrebne servise (www1, www2, lvs) chkconfig iptables off chkconfig ip6tables off Potrebno je instalirati Apache i PHP (www1, www2) yum install httpd mod_php chkconfig httpd on Napravite fajl /var/www/html/index.php (www1, www2) <?php echo "You are now on <strong>" . exec('hostname') . "</strong>"; ?> Nakon toga restartujte servere (www1, www2, lvs) reboot 2. Instalacija LVS managera (lvs) Instalacija LVS managera wget http://default.rs/~mstrugarevic/ldirectord-3.0.10-1.fc13.i686.rpm yum localinstall ldirectord-3.0.10-1.fc13.i686.rpm Kreiranje konfiguracije /etc/ha.d/ldirectord.cf checktimeout=10 checkinterval=2 autoreload=yes logfile="/var/log/ldirectord.log" quiescent=yes virtual=192.168.0.222:80 real=192.168.0.111:80 gate 1 real=192.168.0.112:80 gate 1 checktype=negotiate service=http request="test.html" receive="OK" scheduler=rr protocol=tcp Kreiranje test.html fajlova (www1, www2) echo "OK" > /var/www/html/test.html Dodavanje potrebnih LVS servisa chkconfig ldirectord on 3. Demonstracija Startovanje LVS managera service ldirectord start Monitoring LVS servisa watch ipvsadm -L -n  Otkazivanje jednog od web servera service httpd stop Vraćanje web servera u konfiguraciju service httpd start 4. Pitanja, predlozi, ispravke? |