[ Moving two containers together from one datacenter to another ]

Hello Docker community,

Today I have 3 servers located in 3 differents datacenters for my customer’s php and customer’s database.

  • sites are : STRASBOURG, ROUBAIX and PARIS

with placement-pref I can order via docker-compose to launch container php and db on the same site (ex : strasbourg). But if the Strasbourg server wich contains for example customer1-php and customer1-db and goes down I would like that this 2 containers go up on a same second datacenter (roubaix or paris) BUT not one in paris and another in roubaix (for latency network problem).

How can I manage this ?

Thanks for your help