/blog/ Recent content in News & insights on Fluentbit, High Performance Hugo -- gohugo.io en-us Mon, 23 Mar 2026 00:00:00 +0000 /blog/2026/03/23/new-fluent-bit-helm-charts/ Mon, 23 Mar 2026 00:00:00 +0000 /blog/2026/03/23/new-fluent-bit-helm-charts/ The Fluent Bit team is excited to announce the general availability of two new Helm charts, designed to cater to specific use-cases in log aggregation and collection. The Fluent Bit Aggregator Helm Chart and the Fluent Bit Collector Helm Chart are now available on Artifact Hub, providing users with streamlined deployment options for their logging infrastructure. These charts originated in the stevehipwell/helm-charts repository, where they have been developed and used for the past 5 years. /blog/2025/12/09/fluent-bit-completes-security-audit/ Tue, 09 Dec 2025 00:00:00 +0000 /blog/2025/12/09/fluent-bit-completes-security-audit/ Fluent Bit is a lightweight, high-performance agent for collecting and forwarding logs, metrics, and traces. With a footprint of less than 5 MB, it efficiently handles millions of events per second while keeping CPU and memory usage low, making it well-suited for cloud-native and edge environments. Supporting more than 70 input, filter, and output plugins, Fluent Bit integrates with tools such as Elasticsearch, Loki, Splunk, and Kafka. It is used at scale by organizations including AWS, Microsoft, and LinkedIn, where it reliably processes billions of records daily. /blog/2025/10/28/security-vulnerabilities-addressed-in-fluent-bit-v4.1-and-backported-to-v4.0/ Tue, 28 Oct 2025 00:00:00 +0000 /blog/2025/10/28/security-vulnerabilities-addressed-in-fluent-bit-v4.1-and-backported-to-v4.0/ Scope: Fluent Bit Security issues reported in GitHub Security Advisory (restricted access) On October 23, 2025, we were notified of a few security issues present in Fluent Bit. Those security issues have been remediated in the latest versions currently available of Fluent Bit v4.2, v4.1 (4.1.1) as well as v4.0 (4.0.13). Below please find a summary of the issues and remediation. 1. Executive Summary Purpose: Summarize recently disclosed vulnerabilities affecting pipelines running 3. /blog/2025/07/09/fluent-bit-v4.0.4/ Wed, 09 Jul 2025 00:00:00 +0000 /blog/2025/07/09/fluent-bit-v4.0.4/ 🔥 Fluent Bit v4.0.4 is here ! TL;DR: Fluent Bit v4.0.4 introduces a powerful OpenTelemetry interface for better encoding and decoding, enhanced Lua scripting with OTLP metadata access, character encoding conversion for non-UTF-8 logs, and AWS IAM support for Kafka/MSK — plus performance boosts, NFS-tail fixes, and dozens of other improvements. New OpenTelemetry Interface Fluent Bit continues to strengthen its position as a modern OpenTelemetry data pipeline. In v4.0.4, we introduce a new internal OpenTelemetry interface for handling encoding and decoding — making OTLP log processing faster, safer, and more testable. /blog/2025/04/01/fluent-bit-v4.0/ Tue, 01 Apr 2025 00:00:00 +0000 /blog/2025/04/01/fluent-bit-v4.0/ Fluent Bit v4 is here! Discover what’s new in this release and celebrate 10 years of innovation *This post is republished from the Chronosphere blog. The Fluent Bit maintainers have exciting news to share! Fluent Bit version 4 is out and just in time to celebrate the project’s 10-year anniversary. The journey: From embedded logging to multi-Signal observability With over 15 billion downloads, integration with every major cloud provider, and adoption by thousands of enterprises, Fluent Bit has become the production-grade telemetry pipeline for cloud native environments. /blog/2025/02/28/meet-fluent-bit-v3.2.7/ Fri, 28 Feb 2025 00:00:00 +0000 /blog/2025/02/28/meet-fluent-bit-v3.2.7/ Fluent Bit 3.2.7 Release: Enhancements and Security Fixes Fluent Bit, a fast and lightweight data processor and forwarder for Linux, BSD, Windows and macOS, has released version 3.2.7. This new release brings several important updates and enhancements, particularly focused on security patches, performance improvements, and feature enhancements. Let’s dive into the key highlights of this release. Security Fixes Security is a top priority for any software, and Fluent Bit has been proactive in addressing potential vulnerabilities. /blog/2024/05/21/statement-on-cve-2024-4323-and-its-fix/ Tue, 21 May 2024 00:00:00 +0000 /blog/2024/05/21/statement-on-cve-2024-4323-and-its-fix/ We’d like to make sure you’re aware of a security vulnerability (known as CVE-2024-4323) that impacts Fluent Bit versions 2.0.7 through 3.0.3. The latest version of Fluent Bit, version 3.0.4, fixes this issue. We’ve also backported fix to Fluent Bit version 2.2.3, the last release of Fluent Bit v2. The identified vulnerability arose from a memory corruption error that could potentially create conditions for denial of service events, information disclosure, or, with an extremely sophisticated attack, remote code execution. /blog/2024/03/19/announcing-fluent-bit-v3/ Tue, 19 Mar 2024 00:00:00 +0000 /blog/2024/03/19/announcing-fluent-bit-v3/ This post is republished from the Chronosphere blog. With Chronosphere’s acquisition of Calyptia in 2024, Chronosphere became the primary corporate sponsor of Fluent Bit. Eduardo Silva — the original creator of Fluent Bit and co-founder of Calyptia — leads a team of Chronosphere engineers dedicated full-time to the project, ensuring its continuous development and improvement. Fluent Bit v3 gives users greater control of their data and telemetry pipelines This week at KubeCon + CloudNativeCon EU in Paris, we are announcing the release of Fluent Bit v3, which includes several new features as well as performance enhancements. /blog/2024/03/13/send-distributed-traces-to-aws-x-ray-using-fluent-bit/ Wed, 13 Mar 2024 00:00:00 +0000 /blog/2024/03/13/send-distributed-traces-to-aws-x-ray-using-fluent-bit/ This post is republished from the Chronosphere blog. With Chronosphere’s acquisition of Calyptia in 2024, Chronosphere became the primary corporate sponsor of Fluent Bit. Eduardo Silva — the original creator of Fluent Bit and co-founder of Calyptia — leads a team of Chronosphere engineers dedicated full-time to the project, ensuring its continuous development and improvement. In software development, observability allows us to understand a system from the outside by asking questions about the system without knowing its inner workings. /blog/2024/01/29/a-practical-guide-for-avoiding-data-loss-and-backpressure-problems-with-fluent-bit/ Mon, 29 Jan 2024 00:00:00 +0000 /blog/2024/01/29/a-practical-guide-for-avoiding-data-loss-and-backpressure-problems-with-fluent-bit/ This post is republished from the Chronosphere blog. With Chronosphere’s acquisition of Calyptia in 2024, Chronosphere became the primary corporate sponsor of Fluent Bit. Eduardo Silva — the original creator of Fluent Bit and co-founder of Calyptia — leads a team of Chronosphere engineers dedicated full-time to the project, ensuring its continuous development and improvement. Introduction Fluent Bit is a widely used open-source data collection agent, processor, and forwarder that enables you to collect logs, metrics, and traces from various sources, filter and transform them, and then forward them to multiple destinations. /blog/2023/11/30/kubernetes-metadata-enrichment-with-fluent-bit-with-troubleshooting-tips/ Thu, 30 Nov 2023 00:00:00 +0000 /blog/2023/11/30/kubernetes-metadata-enrichment-with-fluent-bit-with-troubleshooting-tips/ This post is republished from the Chronosphere blog. With Chronosphere’s acquisition of Calyptia in 2024, Chronosphere became the primary corporate sponsor of Fluent Bit. Eduardo Silva — the original creator of Fluent Bit and co-founder of Calyptia — leads a team of Chronosphere engineers dedicated full-time to the project, ensuring its continuous development and improvement. When run in Kubernetes (K8s) as a daemonset, Fluent Bit can ingest Kubelet logs and enrich them with additional metadata from the Kubernetes API server. /blog/2023/11/16/meet-fluent-bit-v2.2/ Thu, 16 Nov 2023 00:00:00 +0000 /blog/2023/11/16/meet-fluent-bit-v2.2/ This post is republished from the Chronosphere blog. With Chronosphere’s acquisition of Calyptia in 2024, Chronosphere became the primary corporate sponsor of Fluent Bit. Eduardo Silva — the original creator of Fluent Bit and co-founder of Calyptia — leads a team of Chronosphere engineers dedicated full-time to the project, ensuring its continuous development and improvement. Last week Calyptia announced the release of Fluent Bit v2.2. at KubeCon + CloudNativeCon North America. /blog/2023/11/13/convert-logs-to-metrics-in-legacy-applications-using-fluent-bit/ Mon, 13 Nov 2023 00:00:00 +0000 /blog/2023/11/13/convert-logs-to-metrics-in-legacy-applications-using-fluent-bit/ This post is republished from the Chronosphere blog. With Chronosphere’s acquisition of Calyptia in 2024, Chronosphere became the primary corporate sponsor of Fluent Bit. Eduardo Silva — the original creator of Fluent Bit and co-founder of Calyptia — leads a team of Chronosphere engineers dedicated full-time to the project, ensuring its continuous development and improvement. In software development, observability allows us to understand a system from the outside, by asking questions about the system without knowing its inner workings. /blog/2023/10/05/dynamic-log-routing-based-on-kubernetes-labels-using-fluent-bit-wasm/ Thu, 05 Oct 2023 00:00:00 +0000 /blog/2023/10/05/dynamic-log-routing-based-on-kubernetes-labels-using-fluent-bit-wasm/ This post is republished from the Chronosphere blog. With Chronosphere’s acquisition of Calyptia in 2024, Chronosphere became the primary corporate sponsor of Fluent Bit. Eduardo Silva — the original creator of Fluent Bit and co-founder of Calyptia — leads a team of Chronosphere engineers dedicated full-time to the project, ensuring its continuous development and improvement. Fluent Bit is a widely-used open-source data collection agent, processor, and forwarder that enables you to collect logs, metrics, and traces from various sources, filter and transform them, and then forward them to multiple destinations. /blog/2023/09/25/fluent-bit-surpasses-10-billion-docker-pulls/ Mon, 25 Sep 2023 00:00:00 +0000 /blog/2023/09/25/fluent-bit-surpasses-10-billion-docker-pulls/ This post is republished from the Chronosphere blog. With Chronosphere’s acquisition of Calyptia in 2024, Chronosphere became the primary corporate sponsor of Fluent Bit. Eduardo Silva — the original creator of Fluent Bit and co-founder of Calyptia — leads a team of Chronosphere engineers dedicated full-time to the project, ensuring its continuous development and improvement. Fluent Bit recently surpassed 10 billion pulls from Docker Hub. That’s billion, with a “B.” 🎉 /blog/2023/08/28/fluent-bit-alerting-via-slack-when-the-log-destination-is-unreachable/ Mon, 28 Aug 2023 00:00:00 +0000 /blog/2023/08/28/fluent-bit-alerting-via-slack-when-the-log-destination-is-unreachable/ This post is republished from the Chronosphere blog. With Chronosphere’s acquisition of Calyptia in 2024, Chronosphere became the primary corporate sponsor of Fluent Bit. Eduardo Silva — the original creator of Fluent Bit and co-founder of Calyptia — leads a team of Chronosphere engineers dedicated full-time to the project, ensuring its continuous development and improvement. Fluent Bit is a widely-used open-source data collection agent, processor, and forwarder that enables you to collect logs, metrics, and traces from various sources, filter and transform them, and then forward them to multiple destinations. /blog/2023/08/08/use-fluent-bit-to-enrich-logs-with-kubernetes-metadata-automatically/ Tue, 08 Aug 2023 00:00:00 +0000 /blog/2023/08/08/use-fluent-bit-to-enrich-logs-with-kubernetes-metadata-automatically/ This post is republished from the Chronosphere blog. With Chronosphere’s acquisition of Calyptia in 2024, Chronosphere became the primary corporate sponsor of Fluent Bit. Eduardo Silva — the original creator of Fluent Bit and co-founder of Calyptia — leads a team of Chronosphere engineers dedicated full-time to the project, ensuring its continuous development and improvement. If you’re in the world of application orchestration (microservices, CI/CD, multi-cloud deployments, data pipelines), Kubernetes is likely an essential tool in your tech stack. /blog/2023/03/01/how-to-send-logs-to-loki-using-fluent-bit/ Wed, 01 Mar 2023 00:00:00 +0000 /blog/2023/03/01/how-to-send-logs-to-loki-using-fluent-bit/ This post is republished from the Chronosphere blog. [With Chronosphere’s acquisition of Calyptia in 2024, Chronosphere became the primary corporate sponsor of Fluent Bit. Eduardo Silva — the original creator of Fluent Bit and co-founder of Calyptia — leads a team of Chronosphere engineers dedicated full-time to the project, ensuring its continuous development and improvement. Modern applications generate a massive volume of logs and other telemetry data, which requires an efficient log management solution. /blog/2023/02/06/send-logs-to-elasticsearch-service-using-fluent-bit/ Mon, 06 Feb 2023 00:00:00 +0000 /blog/2023/02/06/send-logs-to-elasticsearch-service-using-fluent-bit/ This post is republished from the Chronosphere blog. With Chronosphere’s acquisition of Calyptia in 2024, Chronosphere became the primary corporate sponsor of Fluent Bit. Eduardo Silva — the original creator of Fluent Bit and co-founder of Calyptia — leads a team of Chronosphere engineers dedicated full-time to the project, ensuring its continuous development and improvement. Logs are the foundational data of any observability effort. Elasticsearch allows us to store, search, and analyze huge volumes of data quickly, making it ideal for the massive volumes of log and other telemetry data generated by modern applications. /blog/2022/04/04/detect-sensitive-data-with-the-nightfall-filter-plugin/ Mon, 04 Apr 2022 00:00:00 +0000 /blog/2022/04/04/detect-sensitive-data-with-the-nightfall-filter-plugin/ The Nightfall team contributed this plugin and it is now available in Fluent Bit >= 1.9.1. Introduction Sensitive data often makes its way into logs. Though most of the time unintentional, these incidents have the potential to do a lot of damage, as they usually involve exposure of API keys, passwords, and customer data that can give attackers access to critical business data or put companies at compliance risk. This is why it’s important for organizations to be proactive about securing their logs. /blog/2021/01/25/logging-fluentd-with-kubernetes/ Mon, 25 Jan 2021 00:00:00 +0000 /blog/2021/01/25/logging-fluentd-with-kubernetes/ Kubernetes in Production More people use Kubernetes in production today as you can find more from the CNCF survey conducted earlier 2020. The use of containers in production has increased to 92%, up from 84% last year, and up 300% from our first survey in 2016. Kubernetes use in production has increased to 83%, up from 78% last year. 55% of respondents use stateful applications in containers in production. Monitoring - Tracing, Time Series & Logging People talk more about “monitoring” by the context of tracing like distributed tracing from the application perspective as well as monitoring time series data technologies. /blog/2021/01/17/diagtool-for-fluent-bit-is-ready/ Sun, 17 Jan 2021 00:00:00 +0000 /blog/2021/01/17/diagtool-for-fluent-bit-is-ready/ Fluentd vs Fluent Bit Fluent Bit is an open source and multi-platform Log Processor and Forwarder. Both Fluentd and Fluent Bit have been developed by Treasure Data to solve the data collection problem but they have different features. Fluent Bit is light-weight and less dependencies compared to Fluentd, so that Fluent Bit is good for the environment where the system resource for applications are limited such as container and IoT use cases. /blog/2020/12/29/5-minute-guide-to-deploying-fluent-bit-on-kubernetes/ Tue, 29 Dec 2020 00:00:00 +0000 /blog/2020/12/29/5-minute-guide-to-deploying-fluent-bit-on-kubernetes/ In this guide, we will walk through deploying Fluent Bit into Kubernetes and writing logs into Splunk. For this blog, I will use an existing Kubernetes and Splunk environment to make steps simple. You can also see an architecture diagram below: Getting Fluent Bit configuration ready If you are not familiar with Fluent Bit, it is an open-source application written in C to help ship data from many sources to many destinations. /blog/2020/12/15/multiline-logging-with-with-fluent-bit/ Tue, 15 Dec 2020 00:00:00 +0000 /blog/2020/12/15/multiline-logging-with-with-fluent-bit/ There are thousands of different log formats that applications use; however, one of the most challenging structures to collect/parse/transform is multiline logs. While multiline logs are hard to manage, many of them include essential information needed to debug an issue. In this blog, we will walk through multiline log collection challenges and how to use Fluent Bit to collect these critical logs. Example of Java multiline One primary example of multiline log messages is Java stack traces. /blog/2020/12/03/common-architecture-patterns-with-fluentd-and-fluent-bit/ Thu, 03 Dec 2020 00:00:00 +0000 /blog/2020/12/03/common-architecture-patterns-with-fluentd-and-fluent-bit/ Thousands of organizations use Fluent Bit and Fluentd to collect, process, and ship their data from Kubernetes, cloud infrastructure, network devices, and other sources. These organizations may uniquely deploy Fluent Bit and Fluentd; however, many users share common architecture patterns. In this blog, we will talk about 3 of the most common architectures that users leverage when deploying Fluent Bit and Fluentd: Forwarder’s and Aggregators Side car / Agent deployment Network device aggregator Forwarder and Aggregator One of the more common patterns for Fluent Bit and Fluentd is deploying in what is known as the forwarder/aggregator pattern. /blog/2020/12/02/supercharge-your-logging-pipeline-with-fluent-bit-stream-processing/ Wed, 02 Dec 2020 00:00:00 +0000 /blog/2020/12/02/supercharge-your-logging-pipeline-with-fluent-bit-stream-processing/ Fluentd and Fluent Bit are popular open-source Cloud Native Computing Foundation (CNCF) projects used for collecting data from many sources and shipping to a variety of backends such as Splunk, Elasticsearch, and Kafka, to name a few. As data increases within organizations, a single backend can put organizations at a disadvantage due to cost, use cases, and different stakeholders needing the same data (E.g., security and operations). Instead of installing multiple agents, users can leverage Fluentd and Fluent Bit to collect and route data to various backends. /blog/2017/06/27/cloud-native-logging/ Tue, 27 Jun 2017 00:00:00 +0000 /blog/2017/06/27/cloud-native-logging/ The original draft post about Fluent Bit while back in 2017… Logging is something that we have to deal with everyday, from the different components available in production is not the most fun area, but something that needs to be done right to perform proper analysis of applications behavior. In the Cloud Native era, managing things at scale requires special handling and focus on performance and resources usage; logging is not the exception.