Gartner says Docker's containerization tool is sound but immature
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January 12, 2015
Market research firm Gartner has produced a report of Docker's security system and overall, it found the containerization tool sound but somewhat immature.
Published last week, in it's assessment report dubbed 'Security Properties of Containers' Gartner finds that “Linux containers are mature enough to be used as private and public PaaS but they disappoint when it comes to secure administration and management, and support for common controls for confidentiality, integrity and availability, could be improved.”
The document also suggests that running Docker inside a hypervisor (advanced by VMware and to a lesser degree Microsoft) simply doesn't necessarily help matters.
“In the majority of cases, Docker might be deployed on top of guest servers that are on top of hypervisors,” writes analyst Joerg Fritsch. “But except for a further fortification of resource isolation, there is little to be gained from the underlying hypervisor. Docker and containers cannot inherit from the hypervisor what they lack most-- secure administration and management features, and support for common controls for confidentiality, integrity and availability. But the hypervisor adds a level of complexity that will need to be managed separately and may cause friction with, for example, evolving SDNs for containerized environments.”
However, there's better news for the SELinux and AppArmor projects-- Fritsch recommends both as essential tools for those keen to run Docker.
The paper also notes that Docker is so new that it's not yet accrued an ecosystem of tools that make it production-ready.
Dedicated backup is one weakness (addressed by Asigra on the day this paper emerged), there's no encryption tool for Docker containers – the underlying OS gets the gig at disk level – and security companies are yet to turn their attention to endpoint protection of containers.
Docker also lacks live migration tools, Fritsch says, which makes hypervisors a nice place for it to run but leaves it behind Parallels' Virtuozzo.
Overall, Fritsch seems to say that Docker's security features are decent, but that 2015 will likely see the emergence of third-party tools, or additions to Docker itself, that harden the software by improving its manageability and by filling gaps for the kind of functions business expect.
Those arrivals will, he suggests, make it easier to operate Docker within the parameters of known best practices and therefore also lessening worries for infosec and governance professionals alike.
That Fritsch doesn't mention Docker's security vulnerabilities seems to make the document a more-than-decent report card for the product. We'll see in the next few months how that all pans out.
Source: Gartner Inc.
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