Megalos problem retrieving log files from Quagga BGP router

[MOG-22]

Hi Kathará / Megalos Team,

I'm new to Kathará / Megalos and I'm currently working on measuring various performance / convergence criteria of a BGP topology running on a Kubernetes cluster using Megalos.
The setup is working fine so far, and the Quagga BGP routers are producing the logs I need for my work. But I am having trouble extracting them efficiently from Megalos.

What I have tried so far:

• I configure the Quagga BGP router in "zebra.conf" and "bgpd.config" to log to stdout, i.e. "log stdout". But the Loki Stack / Grafana can't find the log stream (with the BGP update messages / keepalives etc.), only these general logs (see below)

Do you know how I could solve this problem or can thing of a better way to retrieve these logs? Is there a way to copy log files between the container running in Kubernetes in the cloud and my remote machine?

Thanks in advance for your help!

[tcaiazzi]

Dear @MOG-22,

Apologies for the delayed response, and thanks for reaching out!

I'm not entirely sure I understand your issue, but if you need to copy files from containers to your host, you can use Kubernetes commands.

• If you're running the network scenario from the CLI: [kubectl cp](https://kubernetes.io/docs/reference/kubectl/generated/kubectl_cp/)
• If you're using the Python APIs:
  • You can leverage the Kubernetes Python client: see Download directory from Pod kubernetes-client/python#1780.
  • Alternatively, you can use the exec to cat the logs inside a container and redirect the stdout to a file on the host.

Probably we should implement something to make this process more straightforward.

Let me know if this helps or if you need further assistance.

P.S. I recommend using FRR instead of Quagga, as Quagga is no longer maintained. Switching to FRR might also simplify your integration with Loki/Grafana.

Thanks!

[MOG-22]

Dear @tcaiazzi,

Thanks for your reply!

Getting the log files with kathara exec and cat works great for me. Thanks for the tip!