[RuslanSJ]

Hi, Jelastic founder is here. Thank you for mentioning our product. Vertical scaling is not a marketing :), it's reality.

Jelastic public cloud providers offer automatic vertical scaling with pay-as-you-use billing model (please do not confuse with pay-as-you-go). Except this our team helps related technologies to become more elastic, for example Java https://jelastic.com/blog/elastic-jvm-vertical-scaling/

Regarding the docker support, there are two flavors inside Jelastic: 1) Native Docker Engine - you can create a dedicated container engine for your project in the same way as you do on any IaaS today, for example “How to run Docker Swarm” https://jelastic.com/blog/docker-swarm-auto-clustering-and-s.... An advantage here is the vertical scaling feature. In Jelastic unused resources will not be considered as paid while at any other cloud provider you will have to pay for the VM resource limits.

2) Enhanced System Containers based on Dockerfile - there is no need to provision a dedicated docker engine or swarm. This solution provides even better density, elasticity, multi-tenancy and security, more advanced integration with UI and PaaS features set compared to #1. It supports multiple processes inside a single container, you can get an SSH access and use all standard tools for app deployment, write to local filesystem, use multicast and so on. It supports traditional or legacy apps while images can be prepared in the same familiar Dockefile format. Unfortunately it's not fully compatible with Native Docker Engine due to specifics limitations/requirements of docker technology itself.

Thank you for pointing out this issue. In the upcoming release we will clarify the difference between two and provide more tips which one is better to use in various cases.

[etaioinshrdlu]

Regarding 1: Any easy set up guide for native mode?

Regarding 2: Is there any fundamental reason why full compatibility will never work?

[RuslanSJ]

1 - An easy way is go to marketplace and print Docker in the search field, choose Engine or Swarm, press install. There is one more article that will be helpful https://jelastic.com/blog/docker-engine-auto-install-connect...

2 - As Docker, Open Containers and other related technologies evolve the difference between system and application containers gets slimmer over the time. As an example well known issue with memory limits https://jelastic.com/blog/java-and-memory-limits-in-containe... now can be solved with help of lxcfs https://medium.com/@Alibaba_Cloud/kubernetes-demystified-usi.... I hope at some point we will be able to use benefits of both in one container engine.