Why node-exporter and CAdvisor metrics are showing different result?

[Anoop Mohan]

  Hi,

I am using the below node-exporter metric to display network usage for external interface.
sum(rate(node_network_receive_bytes_total{instance=~"ip-10-XX-XXX-44.us-west-2.compute.internal",device="eth0"}[5m])) by (instance)
 
The output of the above metric showing the value around 22.5 MBytes

But, when I use the CAdvisor metric, it is showing a different result. 

sum (rate (container_network_receive_bytes_total{kubernetes_io_hostname=~"ip-10-XX-XXX-44.us-west-2.compute.internal",interface="eth0"}[5m])) by (kubernetes_io_hostname)

Any idea why these are showing different results? Do we need to consider something else to get an equivalent result?

Please advise.

Thanks & Regards,

Anoop