phenomenon
[root@localhost ~]# ipvsadm -a -t 20.0.0.11:80 -r 192.168.30.11 -m -w 1
Memory allocation problem
the reason
Because no virtual server is created, the rule is written successfully after the virtual server is created
[root@localhost ~]# ipvsadm -A -t 20.0.0.11:80 -s rr
[root@localhost ~]# ipvsadm -a -t 20.0.0.11:80 -r 192.168.30.11 -m -w 1
[root@localhost ~]# ipvsadm-save >/opt/123
[root@localhost ~]# cat /opt/123
-A -t localhost.localdomain:http -s rr
-a -t localhost.localdomain:http -r localhost.localdomain:http -m -w 1