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fluffy-cakes / azure_egress_nat

How to use an Ubuntu VM for egress
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Problem with VMSS #1

Open miqm opened 1 year ago

miqm commented 1 year ago

Hi,

I stumbled on your repo while trying to build an Azure NVM that will act as forwarder for testing purposes. However I have problem with the waagent - it needs to connect to same IP as load balancer probes - however the wire server works only on the primary nic, not the secondary. and the route you add for the load balancer probe to work makes the outgoing http request to fail - as it cannot reach WireServer.

Do you know if there is some workaround? potentially chaning primary nic could resolve the issue but then we'd need to mess up with default route...

fluffy-cakes commented 1 year ago

Hi, sorry for the belated reply, I missed this message.

One thought that comes to mind is that you could potentially use one NIC to do both jobs of eth0 and eth1, however that would require creating VLANs inside the Ubuntu box and creating a number of custom routes. So eth0 will be the card, and VLAN 1 would be eth0.1 and VLAN 2 would be eth0.2. I use this set up in OpenWRT, which is obviously not the same as Ubuntu, but it still uses the same basic Linux tools to accomplish the same tasks (IP Tables).

This is all off the top of my head guess, I hadn't come into the problem you're experiencing, and it's been a while since I set this up.