Hello @Oleksandr Kucherenko
thank you for your question to use static IP with ACI you can go with one of those solutions as below:
1- Expose a static IP address for a container group
2- Configure a single public IP address for outbound and inbound traffic to a container group
3- Configure a NAT gateway for static IP address for outbound traffic from a container group
4- Deploy a container group with custom DNS settings here what are you looking for.
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