The Dark Side of Containers: Protecting Container Data from Itself
Containers are virtualized but not by hypervisors. They can be deployed to a VM but are not VMs.
Both containers and VMs use server/host OS as the bottom two layers of the stack. In VM environments, the next level is the hypervisor followed by VMs containing guest OS, libraries (div/lib in Linux), and applications. A single VM runs two full operating systems: the host and guest OS.
In contrast, containers do not have a hypervisor layer. A container shares the host OS, housing only the libraries and application code and data. Container benefits include greater portability, less operational overhead, lower OS licensing and maintenance/support costs, and less expensive application development.
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