Public IP not available via metadata

Question

Hello, I think I've encountered a bug or issue with the metadata service in Azure. I'm trying to curl the metadata endpoint to fetch my public IP I associated with a linux VM at boot time. This behavior works fine with a "basic" SKU public IP. However, if I try this with a "standard" SKU IP, the public IP is never listed. Here is the endpoint I've been testing against:
http://169.254.169.254/metadata/instance/network/interface?api-version=2019-06-01

Unsure if this is a legit bug or if there's a difference in behavior between the two types of IPs that I should be expecting.

Answer 1

Hi,
Standard sku public ips are not shown in metadata

Reference: https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-ip-addresses-overview-arm#standard

Actual not from the documnet.

Note

Only Public IP addresses with basic SKU are available when using instance metadata service IMDS. Standard SKU is not supported.

You can submit a request here if you need this feature. Dev teams may take this into their backlog

Answer 2

We had the same problem in our organization. Architects from Microsoft directed us to https://learn.microsoft.com/en-us/azure/load-balancer/howto-load-balancer-imds?tabs=linux. Standard SKU Public IP addresses are available to Instance Metadata Service under the loadbalancer metadata.

Answer 3

We had the same problem too. After talking with Microsoft Architects they directed us to https://learn.microsoft.com/en-us/azure/load-balancer/howto-load-balancer-imds?tabs=linux. We can get Standard SKU Public IPs from the IMDS using the loadbalancer metadata.

Answer 4

What you want is:

Invoke-RestMethod -Headers @{"Metadata"="true"} -Method GET -Uri "http://169.254.169.254:80/metadata/loadbalancer?api-version=2020-10-01" | ConvertTo-Json -Depth 64 | jq -r '.loadbalancer.publicIpAddresses[0].frontendIpAddress'