Symptoms
- All sites residing UI cluster does not work.
- Apache runs on every UI node and answers the URL requests.
LB malfunctions - and does not allow to curl the website from cluster:
[root@lb ~]# curl -k brand01.com curl: (7) couldn't connect to host
ipvsadm show no active connections with web servers:
[root@lb ~]# ipvsadm -L IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn FWM 100 wlc persistent 900 mask 255.255.255.0 -> 203.0.113.2:0 Route 32 0 0 -> 203.0.113.3:0 Route 32 0 0
- Service iptables is stopped.
Cause
Stopped iptables service does not allow Load Balancer working properly as it contains the routing rules required for the functioning.
Resolution
Start iptables service:
/etc/init.d/iptables start