Firecracker is an open source virtualization technology that is purpose-built for creating and managing secure, multi-tenant container and function-based services that provide serverless operational models. Firecracker runs workloads in lightweight virtual machines, called microVMs, which combine the security and isolation properties provided by hardware virtualization technology with the speed and flexibility of containers.
 
The main component of Firecracker is a virtual machine monitor (VMM) that uses the Linux Kernel Virtual Machine (KVM) to create and run microVMs. Firecracker has a minimalist design. It excludes unnecessary devices and guest-facing functionality to reduce the memory footprint and attack surface area of each microVM. This improves security, decreases the startup time, and increases hardware utilization.
 
Firecracker was developed at Amazon Web Services to accelerate the speed and efficiency of services like AWS Lambda and AWS Fargate.

Firecracker is an open source virtualization technology that is purpose-built for creating and managing secure, multi-tenant container and function-based services that provide serverless operational models. Firecracker runs workloads in lightweight virtual machines, called microVMs, which combine the security and isolation properties provided by hardware virtualization technology with the speed and flexibility of containers.

Firecracker - Secure and fast microVMs for serverless computing

RT-Thread (Real-Time Thread) is an open source embedded real-time operating system. It has a strong scalability: from a nano kernel running on a tiny MCU, for example ARM Cortex-M0, or Cortex-M¾/7, to a rich feature system running on MIPS32, ARM Cortex-A, even the emerging open source RISC-V architecture is supported. RT-Thread can run either on single-core systems or on symmetric multi-core processors(SMP) systems.
 
Kernel includes preemptive multi-task real-time scheduler, and infrastructure such as semaphore, mutex, mailbox, message queue, signal, event, memory management, timer management, interrupt management, etc. It also includes libcpu/BSP (file related to chip transplantation/board support package). It supports FAT, UFFS, NFSv3, ROMFS, RAMFS file system.

RT-Thread (Real-Time Thread) is an open source embedded real-time operating system. It has a strong scalability: from a nano kernel running on a tiny MCU, for example ARM Cortex-M0, or Cortex-M¾/7, to a rich feature system running on MIPS32, ARM Cortex-A, even the emerging open source RISC-V architecture is supported. RT-Thread can run either on single-core systems or on symmetric multi-core processors(SMP) systems.

RT-Thread - A Tiny and Elegant IoT Operating System

Cilium is open source software for providing and transparently securing network connectivity and loadbalancing between application workloads such as application containers or processes. Cilium operates at Layer 3/4 to provide traditional networking and security services as well as Layer 7 to protect and secure use of modern application protocols such as HTTP, gRPC and Kafka. Cilium is integrated into common orchestration frameworks such as Kubernetes.
 
A new Linux kernel technology called eBPF is at the foundation of Cilium. It supports dynamic insertion of eBPF bytecode into the Linux kernel at various integration points such as: network IO, application sockets, and tracepoints to implement security, networking and visibility logic. eBPF is highly efficient and flexible.

Cilium is open source software for providing and transparently securing network connectivity and loadbalancing between application workloads such as application containers or processes. Cilium operates at Layer 3/4 to provide traditional networking and security services as well as Layer 7 to protect and secure use of modern application protocols such as HTTP, gRPC and Kafka. Cilium is integrated into common orchestration frameworks such as Kubernetes.

Cilium -  eBPF-based Networking, Security, and Observability

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Firecracker - Secure and fast microVMs for serverless computing

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Firecracker - Secure and fast microVMs for serverless computing

RT-Thread - A Tiny and Elegant IoT Operating System

Cilium - eBPF-based Networking, Security, and Observability

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