4/2/2023 0 Comments Docker codeboxLighter weight: Unlike VMs, containers don’t carry the payload of an entire OS instance and hypervisor. These capabilities-such as control groups (Cgroups) for allocating resources among processes, and namespaces for restricting a processes access or visibility into other resources or areas of the system-enable multiple application components to share the resources of a single instance of the host operating system in much the same way that a hypervisor enables multiple virtual machines (VMs) to share the CPU, memory and other resources of a single hardware server.Īs a result, container technology offers all the functionality and benefits of VMs-including application isolation, cost-effective scalability, and disposability-plus important additional advantages: At this writing, Docker reported over 13 million developers using the platform (link resides outside ibm.com).ĭocker also refers to Docker, Inc. (link resides outside ibm.com), the company that sells the commercial version of Docker, and to the Docker open source project to which Docker, Inc, and many other organizations and individuals contribute.Ĭontainers are made possible by process isolation and virtualization capabilities built into the Linux kernel. But Docker makes containerization faster, easier and safer. It’s possible for developers to create containers without Docker, by working directly with capabilities built into Linux and other operating systems. They have become increasingly popular as organizations shift to cloud-native development and hybrid multicloud environments. Docker is an open source platform that enables developers to build, deploy, run, update and manage containers-standardized, executable components that combine application source code with the operating system (OS) libraries and dependencies required to run that code in any environment.Ĭontainers simplify development and delivery of distributed applications.
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