{"id":476,"date":"2023-07-23T18:46:17","date_gmt":"2023-07-23T18:46:17","guid":{"rendered":"https:\/\/blog.ngocha.biz\/?p=476"},"modified":"2023-07-23T18:46:17","modified_gmt":"2023-07-23T18:46:17","slug":"ebpf","status":"publish","type":"post","link":"https:\/\/blog.ngocha.biz\/?p=476","title":{"rendered":"What is eBPF?"},"content":{"rendered":"

eBPF, or Extended Berkeley Packet Filter, is a recent addition to the Linux kernel, fully available since the Linux 4.4 release.<\/p>\n

It is a highly efficient, sandboxed virtual machine<\/strong> within the Linux kernel that allows for the kernel to be programmable at native execution speed.<\/p>\n

This means that you can extend the capabilities of the kernel without having to modify the kernel’s source code<\/strong>, making it a powerful tool for developers and system administrators.<\/p>\n

For example, when a read system call<\/strong> event occurs, you can run a BPF program. This allows for a high degree of customization and control over system behavior.<\/p>\n

eBPF has a wide range of use cases, including:<\/p>\n

    \n
  1. Security<\/strong>: eBPF can be used to implement advanced security mechanisms, such as intrusion detection systems or firewalls. It can monitor system calls, network packets, and other events for suspicious activity.<\/li>\n
  2. Networking Tracing<\/strong>: eBPF can trace network packets as they pass through the various layers of the network stack, providing detailed information about network behavior and performance.<\/li>\n
  3. Profiling<\/strong>: eBPF can be used to profile system performance, helping to identify bottlenecks and optimize system behavior.<\/li>\n
  4. Observability<\/strong>: eBPF provides a powerful tool for system observability, allowing for detailed monitoring of system events and behavior.<\/li>\n
  5. Monitoring<\/strong>: eBPF can be used to implement advanced system monitoring tools, providing real-time information about system performance and behavior.<\/li>\n<\/ol>\n

    Major companies like Google, Facebook, and Netflix <\/strong>have already implemented eBPF for various use cases in their production systems, demonstrating the power and flexibility of this technology.<\/p>\n

    In the context of Kubernetes<\/strong>, the open-source network plugin Cilium uses BPF for Kubernetes networking, providing advanced networking features and performance enhancements.<\/p>\n

    Furthermore, the Linux kernel development community has announced bpfilter<\/strong>, which will replace the in-kernel iptables implementation with a high-performance, Linux-based BPF network filtering mechanism. This represents a significant advancement in Linux networking technology.<\/p>\n

    In conclusion, eBPF is a powerful and flexible technology that can greatly enhance the capabilities of the Linux kernel. Whether you’re a developer, a system administrator, or just a tech enthusiast, understanding and utilizing eBPF can provide significant benefits.<\/p>\n

    BPF Learning resources<\/h2>\n

    [1]. Getting Started With eBPF<\/a><\/p>\n

    [2]. How to Make Linux Microservice-Aware with Cilium and eBPF<\/a> \u2014 [[Video<\/a>]<\/p>\n

    [3]. Brendan Gregg, Senior Performance Engineer, Netflix Performance and OS Team, explores the past, present and future of BPF, and describes use cases.<\/a><\/p>\n

    [4]. BPF Comes to Firewall<\/a><\/p>\n

    [5]. How companies like Facebook and Google use BPF to patch 0-day exploits<\/a><\/p>\n

    [6] Cloudflare Production ready eBPF<\/a><\/p>\n

    [7]. Replacing iptables with eBPF in Kubernetes with Cilium<\/a><\/p>\n

    [8]. Cilium Kubernetes Network Plugin<\/a><\/p>\n

    [9]. eBPF: exploring use case of BPF kernel infrastructure<\/a><\/p>\n

    [10]. BPF – the forgotten bytecode<\/a><\/p>\n

    \n

    Ngu\u1ed3n:<\/strong> What is eBPF? \u2014 DevOpsCube<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    Source: https:\/\/devopscube.com\/ebpf\/<\/p>\n","protected":false},"author":1,"featured_media":477,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-476","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-devops"],"_links":{"self":[{"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=\/wp\/v2\/posts\/476","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=476"}],"version-history":[{"count":0,"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=\/wp\/v2\/posts\/476\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=\/wp\/v2\/media\/477"}],"wp:attachment":[{"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=476"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=476"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.ngocha.biz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=476"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}