Firecracker: Secure and Fast MicroVMs for Serverless Computing
Original: Firecracker: Secure and fast microVMs for serverless computing
Key topics
The debate around Firecracker, an open-source technology for secure and fast microVMs, is heating up as users weigh its potential for serverless computing. While some are excited about its improved isolation over containers and ease of use, others point out potential bottlenecks with high IO throughput applications and limited virtual devices. Integrating Firecracker into Kubernetes is a tantalizing prospect, with one commenter pointing to an existing project, Flintlock, that's already exploring this idea. It turns out Firecracker has been open source since 2018, with tools like firecracker-containerd already available to facilitate its use.
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- 01Story posted
Aug 29, 2025 at 2:23 AM EDT
4 months ago
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Aug 29, 2025 at 4:48 PM EDT
14h after posting
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Aug 30, 2025 at 5:00 PM EDT
4 months ago
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It uses memory ballooning as its dynamic memory management. Managing this balloon requires some custom implementations if you want to do things like reclaim memory from the guest.
If a large file is created and deleted within the host that disk space stays claimed until the VMs disk is deleted.
No GPU support.
Appears to be trying just what you ask.