Scaling Chef Server
If you search on how to scale Chef Server, you are lucky, there is a SINGLE post in internets. I appreciate the author of this blog post which helped me go in the right direction (moving from standalone instance to multiple).
Unnecessary Updates in BGP
It is well known that BGP, as a distance-vector protocol, suffers from path exploration: For every withdrawn route (AS path or any other mandatory attribute change), the next best, supposedly valid route is selected and announced, until there are no more candidates left in the router’s RIB.
ARP table quiz in Cumulus Linux
The weird situation when you notice that IPv4 get a packet loss, while IPv6 works as expected for the same physical link:
Two years in FRRouting
Since the beginning of my contribution to FRRouting, I raised myself to the top 15 contributors (that’s a huge win for me personally):
Became maintainer of FRRouting
This is the main reason I stopped (or less) blogging because I’m more interested in how the internet works and give my full fingers improving the internet overall.
LLDP does not work with i40ge driver in VMWare ESXi
Imagine your services critically depend on the Link Layer Discovery Protocol (LLDP). And this is the brownie if you have $VMWare ESXi and Intel 710/711722 series NICs.
Git in operations
I was asked from developers to tell about git how we use it in operations team (aka SRE/DevOps). In an ideal world, developers should teach operation guys how to use git at scale. But sometimes reality is far away.
Got my own IPv6 address 2019::E
Prevent route leaks by explicitly defining policy
Route leaks or even hijacks are one of the biggest flaws in global routing.
Traffic steering using GeoDNS and IPv6
Using DNS-based load balancing doesn’t save you from the failure. DNS server doesn’t know if the backend is up or down. It just responds without carrying about the state of the backend.