Azure Linux Guest Agent

Conntrack

WALinuxAgent enables connection tracking for a security feature. You may need to adjust Linux OS configuration to support a large number of connections. Check dmesg output if you faced connectivity issues on Azure VMs and have a lot of connections open. But if you have more than 500k connections, it could be a Azure networking stack limit from Virtual Filtering Platform.

References

• https://learn.microsoft.com/en-us/azure/aks/custom-node-configuration (net.netfilter.nf_conntrack_max)
• https://github.com/Azure/WALinuxAgent/blob/28345a55f9b21dae89472111635fd6e41809d958/azurelinuxagent/common/utils/networkutil.py#L186-L189