Free Cisco 350-901 Actual Exam Questions - Question 7 Discussion
Refer to the exhibit. 
A Docker swarm cluster is configured to load balance services across data centers in three different geographical regions west central and east. The cluster has three manager nodes and three worker nodes Anew service named cisco.devnet is being deployed. The service has these design requirements • All containers must be hosted only on nodes in the central region • The service must run only on nodes that are ineligible for the manager role Which approach fulfills the requirements?
C/D? I’m ruling out A because setting up a new cluster seems overkill and unrelated to filtering nodes by eligibility. B makes no sense since replicas 0 means no containers run. D feels hacky and not standard practice.
D imo, the control flag thing sounds sketchy and not really how Docker swarm handles scheduling. You want something explicit and built-in like placement constraints (C) that can filter nodes by labels, such as region and manager eligibility. B doesn’t make sense because setting replicas to 0 means no containers run at all. A could work but adds unnecessary complexity by creating a new cluster when constraints solve it neatly within the existing one. So C still feels like the cleanest, most Docker-native way to meet both requirements here.
Maybe C makes the most sense since placement constraints let you specify which nodes run the service based on labels like region and role. Seems straightforward for this setup.