fluent · kenhys · Jul 28, 2026 · Jul 28, 2026
diff --git a/README.md b/README.md
@@ -4,5 +4,5 @@
 
 [Fluentd](https://www.fluentd.org/) is an open-source data collector for a unified logging layer. Fluentd allows you to unify data collection and consumption for better use and understanding of data.
 
-[Fluentd](https://www.fluentd.org/) is licensed under the terms of the [Apache License v2.0](http://www.apache.org/licenses/LICENSE-2.0). This project is made and sponsored by [Treasure Data](https://www.treasuredata.com).
+[Fluentd](https://www.fluentd.org/) is licensed under the terms of the [Apache License v2.0](https://www.apache.org/licenses/LICENSE-2.0). This project is made and sponsored by [Treasure Data](https://www.treasuredata.com).
 
diff --git a/container-deployment/docker-logging-driver.md b/container-deployment/docker-logging-driver.md
@@ -1,6 +1,6 @@
 # Docker Logging Driver
 
-The article describes how to implement a unified logging system for your [Docker](http://www.docker.com) containers. An application in a production environment needs to register certain events or problems during its runtime.
+The article describes how to implement a unified logging system for your [Docker](https://www.docker.com) containers. An application in a production environment needs to register certain events or problems during its runtime.
 
 The old-fashioned way is to write these messages into a log file, but that inherits certain problems. Specifically, when we try to perform some analysis over the registers, or on the other hand, if the application has multiple instances running, the scenario becomes even more complex.
 

diff --git a/container-deployment/install-by-docker.md b/container-deployment/install-by-docker.md
@@ -1,6 +1,6 @@
 # Docker Image
 
-This article explains how to use the official [Fluentd Docker image](https://hub.docker.com/r/fluent/fluentd/), maintained by [Treasure Data, Inc](http://www.treasuredata.com/).
+This article explains how to use the official [Fluentd Docker image](https://hub.docker.com/r/fluent/fluentd/), maintained by [Treasure Data, Inc](https://www.treasuredata.com/).
 
 * [Fluentd official Docker image](https://hub.docker.com/r/fluent/fluentd/)
 * [Fluentd official Docker image \(Source\)](https://github.com/fluent/fluentd-docker-image)

diff --git a/container-deployment/kubernetes.md b/container-deployment/kubernetes.md
@@ -2,7 +2,7 @@
 
 ![Fluentd + Kubernetes](../.gitbook/assets/fluentd_kubernetes.png)
 
-[Kubernetes](http://kubernetes.io) provides two logging endpoints for applications and cluster logs:
+[Kubernetes](https://kubernetes.io) provides two logging endpoints for applications and cluster logs:
 
 1. Stackdriver Logging for use with Google Cloud Platform; and,
 2. Elasticsearch.

diff --git a/deployment/plugin-management.md b/deployment/plugin-management.md
@@ -93,7 +93,7 @@ You should specify the target version with `-v` option:
 
 ## `--gemfile` option
 
-A Ruby application manages gem dependencies using Gemfile and [`Bundler`](http://bundler.io/). Fluentd's `--gemfile` option takes the same approach, and is useful for managing plugin versions separated from shared gems.
+A Ruby application manages gem dependencies using Gemfile and [`Bundler`](https://bundler.io/). Fluentd's `--gemfile` option takes the same approach, and is useful for managing plugin versions separated from shared gems.
 
 For example, if you have the following Gemfile at `/etc/fluent/Gemfile`:
 

diff --git a/deployment/trouble-shooting.md b/deployment/trouble-shooting.md
@@ -76,7 +76,7 @@ If `fluentd` suddenly hits an unexpected high CPU usage problem, there are sever
 * regular expression with broken data
 * system calls have a bug, e.g. `inotify` with lots of files
 
-In such cases, you can use `perf` tool on recent Linux to investigate the problem. See [Linux perf Examples](http://www.brendangregg.com/perf.html) page. If you want to know which call causes the problem, [`pid2line.rb`](https://gist.github.com/nurse/0619b6af90df140508c2) is useful.
+In such cases, you can use `perf` tool on recent Linux to investigate the problem. See [Linux perf Examples](https://www.brendangregg.com/perf.html) page. If you want to know which call causes the problem, [`pid2line.rb`](https://gist.github.com/nurse/0619b6af90df140508c2) is useful.
 
 ## Check Uncaught Logs
 

diff --git a/filter/geoip.md b/filter/geoip.md
@@ -140,7 +140,7 @@ Set backend library.
 
 #### Plot Realtime Access Statistics on a World Map using Elasticsearch and Kibana
 
-The `country_code` field is needed to visualize access statistics on a world map using [Kibana](http://www.elasticsearch.org/overview/kibana/).
+The `country_code` field is needed to visualize access statistics on a world map using [Kibana](https://www.elasticsearch.org/overview/kibana/).
 
 Required plugins:
 

diff --git a/how-to-guides/apache-to-mongodb.md b/how-to-guides/apache-to-mongodb.md
@@ -4,9 +4,9 @@ This article explains how to use [Fluentd](https://fluentd.org/)'s MongoDB Outpu
 
 ## Background
 
-[Fluentd](https://fluentd.org/) is an advanced open-source log collector originally developed at [Treasure Data, Inc](http://www.treasuredata.com/). Because Fluentd handles logs as semi-structured data streams, the ideal database should have strong support for semi-structured data. Several candidates meet this criterion, but we believe [MongoDB](http://www.mongodb.org/) is the market leader.
+[Fluentd](https://fluentd.org/) is an advanced open-source log collector originally developed at [Treasure Data, Inc](https://www.treasuredata.com/). Because Fluentd handles logs as semi-structured data streams, the ideal database should have strong support for semi-structured data. Several candidates meet this criterion, but we believe [MongoDB](https://www.mongodb.org/) is the market leader.
 
-MongoDB is an open-source, document-oriented database developed at [MongoDB, Inc](http://www.mongodb.com/). It is schema-free and uses a JSON-like format to manage semi-structured data.
+MongoDB is an open-source, document-oriented database developed at [MongoDB, Inc](https://www.mongodb.com/). It is schema-free and uses a JSON-like format to manage semi-structured data.
 
 This article will show you how to use [Fluentd](https://fluentd.org/) to import Apache logs into MongoDB.
 
@@ -30,7 +30,7 @@ Fluentd does these three \(3\) things:
 The following software/services are required to be set up correctly:
 
 * [Fluentd](https://www.fluentd.org/)
-* [MongoDB](http://www.mongodb.org/)
+* [MongoDB](https://www.mongodb.org/)
 * [Apache](https://httpd.apache.org/) (with the Combined Log Format)
 
 For simplicity, this article will describe how to set up a one-node configuration.
@@ -42,7 +42,7 @@ You can install Fluentd via major packaging systems.
 
 For MongoDB, please refer to the following downloads page:
 
-* [MongoDB Downloads](http://www.mongodb.org/downloads)
+* [MongoDB Downloads](https://www.mongodb.org/downloads)
 
 ## Install MongoDB Plugin
 

diff --git a/how-to-guides/apache-to-s3.md b/how-to-guides/apache-to-s3.md
@@ -4,7 +4,7 @@ This article explains how to use [Fluentd](https://fluentd.org/)'s Amazon S3 Out
 
 ## Background
 
-[Fluentd](https://fluentd.org/) is an advanced open-source log collector originally developed at [Treasure Data, Inc](http://www.treasuredata.com/). One of the main objectives of log aggregation is data archiving. [Amazon S3](http://aws.amazon.com/s3/), the cloud object storage provided by Amazon, is a popular solution for data archiving.
+[Fluentd](https://fluentd.org/) is an advanced open-source log collector originally developed at [Treasure Data, Inc](https://www.treasuredata.com/). One of the main objectives of log aggregation is data archiving. [Amazon S3](https://aws.amazon.com/s3/), the cloud object storage provided by Amazon, is a popular solution for data archiving.
 
 This article will show you how to use [Fluentd](https://fluentd.org/) to import Apache logs into Amazon S3.
 

diff --git a/how-to-guides/http-to-hdfs.md b/how-to-guides/http-to-hdfs.md
@@ -1,10 +1,10 @@
 # Data Collection with Hadoop \(HDFS\)
 
-This article explains how to use [Fluentd](https://fluentd.org/)'s [WebHDFS Output plugin](http://github.com/fluent/fluent-plugin-webhdfs/) to aggregate semi-structured logs into Hadoop HDFS.
+This article explains how to use [Fluentd](https://fluentd.org/)'s [WebHDFS Output plugin](https://github.com/fluent/fluent-plugin-webhdfs/) to aggregate semi-structured logs into Hadoop HDFS.
 
 ## Background
 
-[Fluentd](https://fluentd.org/) is an advanced open-source log collector originally developed at [Treasure Data, Inc](http://www.treasuredata.com/). Fluentd is specifically designed to solve the big-data log collection problem. A lot of users are using Fluentd with MongoDB, and have found that it doesn't scale well for now.
+[Fluentd](https://fluentd.org/) is an advanced open-source log collector originally developed at [Treasure Data, Inc](https://www.treasuredata.com/). Fluentd is specifically designed to solve the big-data log collection problem. A lot of users are using Fluentd with MongoDB, and have found that it doesn't scale well for now.
 
 HDFS \(Hadoop\) is a natural alternative for storing and processing a huge amount of data. It supports an HTTP interface called WebHDFS in addition to its Java library.
 
@@ -128,14 +128,14 @@ drwxr-xr-x   - 1 supergroup          0 2012-10-22 09:40 /log/20121022_14/access.
 
 ## Conclusion
 
-Fluentd with WebHDFS makes the realtime log collection simple, robust and scalable! [@tagomoris](http://github.com/tagomoris) has already been using this plugin to collect 20,000 msgs/sec, 1.5 TB/day without any major problems for several months now.
+Fluentd with WebHDFS makes the realtime log collection simple, robust and scalable! [@tagomoris](https://github.com/tagomoris) has already been using this plugin to collect 20,000 msgs/sec, 1.5 TB/day without any major problems for several months now.
 
 ## Learn More
 
 * [Fluentd Architecture](https://www.fluentd.org/architecture)
 * [Fluentd Get Started](../quickstart/)
 * [WebHDFS Output Plugin](../output/webhdfs.md)
-* [Slides: Fluentd and WebHDFS](http://www.slideshare.net/tagomoris/fluentd-and-webhdfs)
+* [Slides: Fluentd and WebHDFS](https://www.slideshare.net/tagomoris/fluentd-and-webhdfs)
 
 If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](https://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
 
diff --git a/how-to-guides/http-to-td.md b/how-to-guides/http-to-td.md
@@ -128,7 +128,7 @@ Result     :
 +-----+
 ```
 
-It is not advisable to send sensitive user information to the cloud. To assist with this need, `out_tdlog` comes with some anonymization systems. For more details, see [Treasure Data plugin](http://github.com/treasure-data/fluent-plugin-td/).
+It is not advisable to send sensitive user information to the cloud. To assist with this need, `out_tdlog` comes with some anonymization systems. For more details, see [Treasure Data plugin](https://github.com/treasure-data/fluent-plugin-td/).
 
 ## Conclusion
 
@@ -139,7 +139,7 @@ Fluentd + Treasure Data gives you a data collection and analysis system in days,
 * [Fluentd Architecture](https://www.fluentd.org/architecture)
 * [Fluentd Get Started](../quickstart/)
 * [Treasure Data](https://www.fluentd.org/treasuredata)
-* [Treasure Data: Documentation](http://docs.treasuredata.com/)
+* [Treasure Data: Documentation](https://docs.treasuredata.com/)
 
 If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](https://www.fluentd.org/) is an open-source project under [Cloud Native Computing Foundation \(CNCF\)](https://cncf.io/). All components are available under the Apache 2 License.
 
diff --git a/how-to-guides/kinesis-stream.md b/how-to-guides/kinesis-stream.md
@@ -6,7 +6,7 @@ This article explains how to use [Fluentd](https://fluentd.org/)'s [Amazon Kines
 
 ## Background
 
-[Fluentd](https://fluentd.org/) is an advanced open-source log collector originally developed at [Treasure Data, Inc](http://www.treasuredata.com/). Because Fluentd can collect logs from various sources, [Amazon Kinesis](https://aws.amazon.com/kinesis/) is one of the popular destinations for the output.
+[Fluentd](https://fluentd.org/) is an advanced open-source log collector originally developed at [Treasure Data, Inc](https://www.treasuredata.com/). Because Fluentd can collect logs from various sources, [Amazon Kinesis](https://aws.amazon.com/kinesis/) is one of the popular destinations for the output.
 
 Amazon Kinesis is a platform for streaming data on AWS, offering powerful services to make it easy to load and analyze streaming data, and also providing the ability for you to build custom streaming data applications for specialized needs.
 
@@ -122,7 +122,7 @@ The `random_partition_key true` option will generate the partition key via UUID
 
 For additional configurations, see [Kinesis Output plugin](https://github.com/awslabs/aws-fluent-plugin-kinesis).
 
-For those who are interested in security, all communication between Fluentd and Amazon Kinesis are done via HTTPS. If you do not want to have AES keys in the configuration file, [IAM Role-based authentication](http://docs.aws.amazon.com/kinesis/latest/dev/controlling-access.html) is available too for EC2 nodes.
+For those who are interested in security, all communication between Fluentd and Amazon Kinesis are done via HTTPS. If you do not want to have AES keys in the configuration file, [IAM Role-based authentication](https://docs.aws.amazon.com/kinesis/latest/dev/controlling-access.html) is available too for EC2 nodes.
 
 ## Test
 

diff --git a/how-to-guides/raspberrypi-cloud-data-logger.md b/how-to-guides/raspberrypi-cloud-data-logger.md
@@ -1,6 +1,6 @@
 # Cloud Data Logging with Raspberry Pi
 
-[Raspberry Pi](http://www.raspberrypi.org/) is a credit-card-sized single-board computer. Because it is low-cost and easy to equip with various types of sensors, using Raspberry Pi as a cloud data logger is one of its ideal use cases.
+[Raspberry Pi](https://www.raspberrypi.org/) is a credit-card-sized single-board computer. Because it is low-cost and easy to equip with various types of sensors, using Raspberry Pi as a cloud data logger is one of its ideal use cases.
 
 ![Cloud Data Logger by Raspberry Pi](../.gitbook/assets/raspberry-pi-cloud-data-logger.png)
 
@@ -10,7 +10,7 @@ This article introduces how to transport sensor data from Raspberry Pi to the cl
 
 [Raspbian](http://www.raspbian.org/) is a free operating system based on Debian, optimized for the Raspberry Pi. Please install Raspbian on your Raspberry Pi by following the instructions in the blog post below:
 
-* [Getting Started with Raspberry Pi: Installing Raspbian](http://www.andrewmunsell.com/blog/getting-started-raspberry-pi-install-raspbian)
+* [Getting Started with Raspberry Pi: Installing Raspbian](https://www.andrewmunsell.com/blog/getting-started-raspberry-pi-install-raspbian)
 
 ## Install Fluentd
 

diff --git a/input/exec.md b/input/exec.md
@@ -184,7 +184,7 @@ If you already have a script that runs periodically \(say, via `cron`\) that you
 
 The only requirement for the script is that it outputs TSV, JSON or MessagePack.
 
-For example, this [script](https://gist.github.com/kiyoto/1bd903ad1bdd6ac51fcc) scrapes the front page of [Hacker News](http://news.ycombinator.com) and scrapes information about each post:
+For example, this [script](https://gist.github.com/kiyoto/1bd903ad1bdd6ac51fcc) scrapes the front page of [Hacker News](https://news.ycombinator.com) and scrapes information about each post:
 
 Suppose that script is called `hn.rb`. Then, you can run it every 5 minutes with the following configuration:
 

diff --git a/input/forward.md b/input/forward.md
@@ -337,7 +337,7 @@ The array of usernames.
 
 ## Protocol
 
-This plugin accepts both JSON and [MessagePack](http://msgpack.org/) messages and automatically detects which one is used. Internally, Fluentd uses MessagePack as it is more efficient than JSON.
+This plugin accepts both JSON and [MessagePack](https://msgpack.org/) messages and automatically detects which one is used. Internally, Fluentd uses MessagePack as it is more efficient than JSON.
 
 The time value is an `EventTime` or a platform-specific integer and is based on the output of Ruby's `Time.now.to_i` function. On Linux, BSD, and Mac systems, this is the number of seconds since 1970.
 

diff --git a/input/syslog.md b/input/syslog.md
@@ -26,7 +26,7 @@ This tells Fluentd to create a socket listening on port 5140. You need to set up
 
 ### Example Usage
 
-The retrieved data is organized as follows. Fluentd's tag is generated by the `tag` parameter \(tag prefix\), [facility level](http://en.wikipedia.org/wiki/Syslog#Facility_Levels), and [priority](http://en.wikipedia.org/wiki/Syslog#Severity_levels). The record is parsed by the `regexp` [here](https://github.com/fluent/fluentd/blob/master/lib/fluent/plugin/parser_syslog.rb#L23).
+The retrieved data is organized as follows. Fluentd's tag is generated by the `tag` parameter \(tag prefix\), [facility level](https://en.wikipedia.org/wiki/Syslog#Facility_Levels), and [priority](https://en.wikipedia.org/wiki/Syslog#Severity_levels). The record is parsed by the `regexp` [here](https://github.com/fluent/fluentd/blob/master/lib/fluent/plugin/parser_syslog.rb#L23).
 
 ```text
 tag = "#{@tag}.#{facility}.#{priority}"
@@ -57,7 +57,7 @@ The value must be `syslog`.
 
 ### `tag` \(required\)
 
-The prefix of the tag. The tag itself is generated by the tag prefix, [facility level](http://en.wikipedia.org/wiki/Syslog#Facility_Levels), and [priority](http://en.wikipedia.org/wiki/Syslog#Severity_levels).
+The prefix of the tag. The tag itself is generated by the tag prefix, [facility level](https://en.wikipedia.org/wiki/Syslog#Facility_Levels), and [priority](https://en.wikipedia.org/wiki/Syslog#Severity_levels).
 
 ### `port`
 

diff --git a/installation/before-install.md b/installation/before-install.md
@@ -57,7 +57,7 @@ net.ipv4.ip_local_reserved_ports = 24224
 
 Use `sysctl -p` command or reboot your node for the changes to take effect.
 
-These kernel options were originally taken from the presentation [How Netflix Tunes EC2 Instances for Performance](https://www.slideshare.net/brendangregg/how-netflix-tunes-ec2-instances-for-performance) by [Brendan Gregg](http://www.brendangregg.com/), Senior Performance Architect at AWS re:Invent 2017.
+These kernel options were originally taken from the presentation [How Netflix Tunes EC2 Instances for Performance](https://www.slideshare.net/brendangregg/how-netflix-tunes-ec2-instances-for-performance) by [Brendan Gregg](https://www.brendangregg.com/), Senior Performance Architect at AWS re:Invent 2017.
 
 ## Use sticky bit symlink/hardlink protection
 

diff --git a/installation/install-by-deb-td-agent-v3.md b/installation/install-by-deb-td-agent-v3.md
@@ -1,12 +1,12 @@
 # Install by DEB Package v3 \(Debian/Ubuntu\)
 
-This article explains how to install the `td-agent` deb package, the stable Fluentd distribution package maintained by [Treasure Data, Inc](http://www.treasuredata.com/).
+This article explains how to install the `td-agent` deb package, the stable Fluentd distribution package maintained by [Treasure Data, Inc](https://www.treasuredata.com/).
 
 ## What is `td-agent`?
 
 Fluentd is written in Ruby for flexibility, with performance-sensitive parts in C. However, some users may have difficulty installing and operating a Ruby daemon.
 
-That is why [Treasure Data, Inc](http://www.treasuredata.com/) provides **the stable distribution of Fluentd**, called `td-agent`. The differences between Fluentd and `td-agent` can be found [here](https://www.fluentd.org/faqs).
+That is why [Treasure Data, Inc](https://www.treasuredata.com/) provides **the stable distribution of Fluentd**, called `td-agent`. The differences between Fluentd and `td-agent` can be found [here](https://www.fluentd.org/faqs).
 
 ## Installing `td-agent`
 

diff --git a/installation/install-by-deb-td-agent-v4.md b/installation/install-by-deb-td-agent-v4.md
@@ -1,12 +1,12 @@
 # Install by DEB Package \(Debian/Ubuntu\)
 
-This article explains how to install stable versions of `td-agent` deb packages, the stable Fluentd distribution packages maintained by [Treasure Data, Inc](http://www.treasuredata.com/).
+This article explains how to install stable versions of `td-agent` deb packages, the stable Fluentd distribution packages maintained by [Treasure Data, Inc](https://www.treasuredata.com/).
 
 ## What is `td-agent`?
 
 Fluentd is written in Ruby for flexibility, with performance-sensitive parts in C. However, some users may have difficulty installing and operating a Ruby daemon.
 
-That is why [Treasure Data, Inc](http://www.treasuredata.com/) provides **the stable distribution of Fluentd**, called `td-agent`. The differences between Fluentd and `td-agent` can be found [here](https://www.fluentd.org/faqs).
+That is why [Treasure Data, Inc](https://www.treasuredata.com/) provides **the stable distribution of Fluentd**, called `td-agent`. The differences between Fluentd and `td-agent` can be found [here](https://www.fluentd.org/faqs).
 
 This installation guide is for `td-agent` v4. `td-agent` v4 uses fluentd v1 in the core. See [this page](../appendix/td-agent-v2-vs-v3-vs-v4.md) for the comparison and supported OS.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -4,5 +4,5 @@

		[Fluentd](https://www.fluentd.org/) is an open-source data collector for a unified logging layer. Fluentd allows you to unify data collection and consumption for better use and understanding of data.

		[Fluentd](https://www.fluentd.org/) is licensed under the terms of the [Apache License v2.0](http://www.apache.org/licenses/LICENSE-2.0). This project is made and sponsored by [Treasure Data](https://www.treasuredata.com).
		[Fluentd](https://www.fluentd.org/) is licensed under the terms of the [Apache License v2.0](https://www.apache.org/licenses/LICENSE-2.0). This project is made and sponsored by [Treasure Data](https://www.treasuredata.com).