Rewrite the Fluentd UI page as an end-of-life notice

SUMMARY.md

@@ -61,7 +61,7 @@
   * [Failure Scenarios](deployment/failure-scenarios.md)
   * [Plugin Management](deployment/plugin-management.md)
   * [Trouble Shooting](deployment/trouble-shooting.md)
-  * [Fluentd UI](deployment/fluentd-ui.md)
+  * [Fluentd UI \(unmaintained\)](deployment/fluentd-ui.md)
   * [Linux Capability](deployment/linux-capability.md)
   * [Command Line Option](deployment/command-line-option.md)
   * [Source Only Mode](deployment/source-only-mode.md)

deployment/fluentd-ui.md

@@ -1,79 +1,18 @@
 # Fluentd UI
 
-[fluentd-ui](https://github.com/fluent/fluentd-ui) is a browser-based [fluentd](https://fluentd.org/) and [td-agent](https://docs.treasuredata.com/display/public/PD/About+Treasure+Data%27s+Server-Side+Agent) manager that supports the following operations:
-
-* Install, uninstall, and upgrade Fluentd plugins
-* Start/stop/restart fluentd process
-* Configure Fluentd settings such as config file, pid file path, etc.
-* View Fluentd log with simple error viewer
-
 {% hint style='danger' %}
-`fluentd-ui` is not maintained anymore. It won't work with `fluent-package`. This content is for v0.12 for now.
+**`fluentd-ui` is no longer maintained.** The last release, 1.2.1, was published in November 2018. It depends on Rails 5.2 and does not work with current versions of Ruby or Fluentd. It is not included in `fluent-package`. Do not install it on new systems.
 {% endhint %}
 
-## Enterprise
-
-[Chronosphere Telemetry Pipeline](https://chronosphere.io/platform/telemetry-pipeline/) provides an enterprise UI on top of Fluentd and Fluent Bit. Please visit their site for more information.
-
-
-## Getting Started
-
-For `td-agent`, you can start it by `td-agent-ui start` like this:
-
-```text
-$ sudo /usr/sbin/td-agent-ui start
-Puma 2.9.2 starting...
-* Min threads: 0, max threads: 16
-* Environment: production
-* Listening on tcp://0.0.0.0:9292
-```
-
-For `fluentd` gem installation, install `fluentd-ui` via `gem` command:
-
-```text
-$ gem install -V fluentd-ui
-$ fluentd-ui start
-Puma 2.9.2 starting...
-* Min threads: 0, max threads: 16
-* Environment: production
-* Listening on tcp://0.0.0.0:9292
-```
-
-Then, open [http://localhost:9292/](http://localhost:9292/) in your browser.
-
-The default account credentials are:
-
-* `username="admin"`
-* `password="changeme"`
-
-![Fluentd UI](../.gitbook/assets/fluentd-ui%20%281%29%20%282%29.gif)
-
-## Screenshots
-
-\(v0.3.9\)
-
-### Dashboard
-
-![Fluentd UI: Dashboard](../.gitbook/assets/dashboard%20%281%29%20%281%29%20%281%29.gif)
-
-### Setting
-
-![Fluentd UI: Settings](../.gitbook/assets/setting.gif)
-
-### `in_tail` setting
-
-![Fluentd UI: \`in\_tail\` Settings](../.gitbook/assets/in_tail%20%282%29.gif)
-
-### Plugin
-
-![Plugin](../.gitbook/assets/plugin.gif)
-
-![](../.gitbook/assets/01%20%282%29.png)
-
-![](../.gitbook/assets/02%20%281%29.png)
+`fluentd-ui` was a browser-based management interface for Fluentd and `td-agent`. It allowed users to edit the configuration file, install plugins and view logs from a web browser. This page is kept for reference only. If you are still running Fluentd v0.12, the setup instructions remain on [the v0.12 version of this page](https://docs.fluentd.org/0.12/deployment/fluentd-ui).
 
-![](../.gitbook/assets/03%20%281%29.png)
+For monitoring and operating Fluentd today, use the following instead:
 
-![](../.gitbook/assets/04.png)
+* [Monitoring Fluentd](../monitoring-fluentd/overview.md): overview of the monitoring options
+* [Monitoring by REST API](../monitoring-fluentd/monitoring-rest-api.md): `in_monitor_agent` exposes internal metrics over HTTP
+* [Monitoring by Prometheus](../monitoring-fluentd/monitoring-prometheus.md): metrics for Prometheus and Grafana
+* [RPC](rpc.md): HTTP RPC endpoints for reloading the configuration and other operations
+* [Plugin Management](plugin-management.md): installing and managing plugins with `fluent-gem`
+* [Logging](logging.md): where Fluentd writes its own logs
 
-![](../.gitbook/assets/05.png)
+The source code remains available at [https://github.com/fluent/fluentd-ui](https://github.com/fluent/fluentd-ui).

llms.txt

@@ -83,7 +83,6 @@ Documentation for the end-of-life v0.12 series is at https://docs.fluentd.org/0.
 - [Failure Scenarios](https://docs.fluentd.org/deployment/failure-scenarios.md): This article describes various Fluentd failure scenarios.
 - [Plugin Management](https://docs.fluentd.org/deployment/plugin-management.md): This article explains how to manage Fluentd plugins, including adding third-party plugins.
 - [Trouble Shooting](https://docs.fluentd.org/deployment/trouble-shooting.md): If things are not happening as expected, please first look at your logs.
-- [Fluentd UI](https://docs.fluentd.org/deployment/fluentd-ui.md): fluentd-ui is a browser-based fluentd and td-agent manager that supports the following operations
 - [Using Linux Capabilities](https://docs.fluentd.org/deployment/linux-capability.md): This article shows configuration and dependent gem installation instructions for enabling Linux capabilities on Fluentd core.
 - [Command Line Option](https://docs.fluentd.org/deployment/command-line-option.md): This article describes the command-line tools and their options in `fluentd` project.
 - [Source Only Mode](https://docs.fluentd.org/deployment/source-only-mode.md): Since v1.18.0, Fluentd can launch with source-only mode.

parser/regexp.md

@@ -105,6 +105,6 @@ record:
 
 ### How to debug my regexp pattern?
 
-[fluentd-ui's `in_tail` editor](../deployment/fluentd-ui.md#in_tail-setting) helps your regexp testing. Another way, [Fluentular](https://fluentular.herokuapp.com/) is a great website to test your regexp for Fluentd configuration.
+[Fluentular](https://fluentular.herokuapp.com/) is a great website to test your regexp for Fluentd configuration.
 
-NOTE: You may hit Application Error at Fluentular due to [heroku's free plan limitation](https://www.heroku.com/pricing). Retry a few hours later or use `fluentd-ui` instead.
+NOTE: You may hit Application Error at Fluentular due to [heroku's free plan limitation](https://www.heroku.com/pricing). Retry a few hours later.

quickstart/faq.md

@@ -108,6 +108,6 @@ Please refer to the [Plugin Development Guide](../plugin-development/).
 
 ### How can I parse `<my complex text log>`?
 
-If you are willing to write Regexp, [fluentd-ui's `in_tail` editor](../deployment/fluentd-ui.md#in_tail-setting) or [Fluentular](https://fluentular.herokuapp.com) is a great tool to verify your Regexps.
+If you are willing to write Regexp, [Fluentular](https://fluentular.herokuapp.com) is a great tool to verify your Regexps.
 
 If you do NOT want to write any Regexp, look at [the Grok parser](https://github.com/kiyoto/fluent-plugin-grok-parser).