Our customer is talking with a vendor discussing some monitoring software and they would require Docker containers on these devices. They currently have older 4200s that are in our legacy infrastructure, also have newer 4400s that will be take over. Customer would like to know if these devices have the capability of installing these Docker containers and if so, would they hinder the performance disrupting any routing/switching.
Docker containers compatibility
Docker Containers matter information found indicates it is only supported for Junos Evolved OS, and the 3 platforms (EX4200, EX4400 & EX4500) in questions do not support Junos Evolved OS
Reference: Running Third-Party Applications in Containers | Juniper Networks
Also as part of Third Party Application founded the following:
Third Party Application | Juniper Networks Pathfinder Feature Explorer
This link would let you know what platforms would support Third Party Application that would include Docker Container.