Hetzner subsea fibre cut outage

Bitten by a shark, or snagged on a russian submarine? Whichever the case, I just ran an ansible deployment over our cluster that's spread over their Frankfurt and Helsinki datacenters, and I didn't notice any difference. I guess that's to be expected, their line between those datacenters is just an optimization, the internet is still functioning as it always is and maybe Hetzner gets a slightly larger egress bill from their ISP as the inter-dc traffic gets rerouted the general internet.

Best guess this is the cable based on Hetzner investment and landings:

https://www.submarinecablemap.com/submarine-cable/c-lion1

That seems to be correct.

https://www.hetzner.com/presse-berichte/2016/01/156818

> Hetzner Online GmbH, the first major Central European provider of data center services to construct a new data center park in Finland, is also a user and co-investor in the Cinia CLion1 cable connection.

Yeah there's special tech for that! Has something to do with sending some frequency over the line and measuring how long it takes to "reflect" off of the breakage and back to the shore.