Cannot choose network during VM deployment on UI

[GabrielBrascher]

ISSUE TYPE

• Bug Report

COMPONENT NAME

UI and Network (NetworkModelImpl)

CLOUDSTACK VERSION

+4.12

CONFIGURATION

This issue happens when a network has all the following characteristics:

• advanced networking with security groups
• traffic type of "Guest"
• guest type of "Shared"
• IPv6 cidr not null

SUMMARY

The Javascript code adds the parameter canusefordeploy=true on the API call when the network is an advanced network with security groups. With that, the endpoint (management server) expects "canUseForDeploy" == true; however, the returned value is false due to not finding IPv6 addresses available in the network which makes the UI to not list the networks.

Table "user_ipv6_address" (UserIpv6AddressVO) is empty and will always be (as it is a legacy code/table, not used in any IP allocation flow). I will be soon sending a PR fixing it by removing that IPv6 address verification.