Since Plesk Onyx you will be able to install memcache as a Docker container and configure http(s) proxy rule for it to map to your web app.
Docker and proxy rules are available in Plesk Onyx Preview already, you can try it here https://talk.plesk.com/threads/plesk-onyx-preview-and-feedback.337172/
SEArmin Kirchhoff commented
i have a similar setup, i am not allowed to run a extra vm inside my vm.
thereforce i please you to also add a other option to run this without the overhead of a extra vm(docker) only to run ONE similar service more on a server, which usally runs on a debian/ubuntu based system which leads only to add one more service physically
135 votesArmin Kirchhoff supported this idea ·