Currently, Alertmanager has an issue in accessing Alertmanager GUI with IPv6
(see, Parsing URLs with IPv6 host issue). To
overcome this issue, perform the following steps to use the DNS names concept as
Alertmanager does not support IPv6 address format.
Open the hosts file from the following path:
C:\Windows\System32\drivers\etc\hosts.
Add the following entry to map the worker-node IP of IPv6 cluster with
a DNS name:
# DNS Mapping for alertmanager
2606:b400:605:b819:4631:92ff:fe73:9d2c alertmanager
Open GUI using NodePort and DNS name. For example,
http://alertmanager:30854/alertmanager