Cant use domain name in zabbix_proxy.conf, work properly with ip of k8s cluster node

[joao.medeiros]

Hi friends,

I'm trying to implement Zabbix Server in Kubernetes, but I'm facing some difficulty with network communication between Zabbix Proxy and Zabbix-Server. Take a look at my scenario:


zabbix.domain.com => 10.10.10.110 (HAPROXY)

Configuring my zabbix_proxy.conf file, when I insert the ip address of the worker-1 node where are the zabbix pods in some moment, the communication works fine. But when I try to insert my domain as a value, doesn't.



Look the logs of Zabbix Proxy when I put zabbix.domain.com as Server value.

root@zabbix-proxy-02:/etc/zabbix# tail -f /var/log/zabbix/zabbix_proxy.log
1051486:20220223:225627.200 proxy #95 started [icmp pinger #5]
1051487:20220223:225627.201 proxy #96 started [icmp pinger #6]
1051488:20220223:225627.201 proxy #97 started [icmp pinger #7]
1051489:20220223:225627.202 proxy #98 started [icmp pinger #8]
1051490:20220223:225627.203 proxy #99 started [icmp pinger #9]
1051491:20220223:225627.203 proxy #100 started [icmp pinger #10]
1051492:20220223:225627.204 proxy #101 started [history poller #1]
1051493:20220223:225627.204 proxy #102 started [availability manager #1]
1051375:20220223:225627.235 cannot send heartbeat message to server at "zabbix.domain.com": connection is not allowed
1051376:20220223:225628.129 cannot send proxy data to server at "zabbix.domain.com": connection is not allowed
1051376:20220223:225629.152 cannot send proxy data to server at "zabbix.domain.com": connection is not allowed
1051376:20220223:225630.171 cannot send proxy data to server at "zabbix.domain.com": connection is not allowed

My haproxy.conf configuration.

frontend http
mode tcp
bind *:80
default_backend http_back

frontend https
mode tcp
bind *:443
default_backend https_back

frontend zabix
mode tcp
bind *:10051
default_backend zabbix_back

frontend kubernetes
mode tcp
bind *:6443
option tcplog
default_backend kubernetes-master-nodes

backend kubernetes-master-nodes
mode tcp
balance roundrobin
option tcp-check
server master-0 10.10.10.111:6443 check fall 3 rise 2

backend http_back
mode tcp
option log-health-checks
default-server inter 10s fall 2
server worker-0 10.10.10.112:80 send-proxy check
server worker-1 10.10.10.113:80 send-proxy check
server worker-2 10.10.10.114:80 send-proxy check

backend https_back
mode tcp
option tcp-check
option log-health-checks
default-server inter 10s fall 2
server worker-0 10.10.10.112:443 send-proxy check
server worker-1 10.10.10.113:443 send-proxy check
server worker-2 10.10.10.114:443 send-proxy check

backend zabbix_back
mode tcp
option tcp-check
option log-health-checks
default-server inter 10s fall 2
server worker-0 10.10.10.112:10051 send-proxy check
server worker-1 10.10.10.113:10051 send-proxy check
server worker-2 10.10.10.114:10051 send-proxy check

Can someone help? Or have any idea?