From 2147dbeae9cd0782a1bb1becf64cff7f18d34668 Mon Sep 17 00:00:00 2001
From: LinuxServer-CI <ci@linuxserver.io>
Date: Sun, 2 Nov 2025 22:06:07 +0000
Subject: [PATCH] Bot Updating Templated Files

---
 README.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/README.md b/README.md
index d30037d..4a79e4f 100644
--- a/README.md
+++ b/README.md
@@ -157,11 +157,13 @@ services:
       - SIDEKIQ_THREADS=5 #optional
       - DB_POOL=5 #optional
       - NO_CHOWN= #optional
+      - MASTODON_PROMETHEUS_EXPORTER_ENABLED= #optional
     volumes:
       - /path/to/mastodon/config:/config
     ports:
       - 80:80
       - 443:443
+      - 9394:9394 #optional
     restart: unless-stopped
 ```
 
@@ -210,8 +212,10 @@ docker run -d \
   -e SIDEKIQ_THREADS=5 `#optional` \
   -e DB_POOL=5 `#optional` \
   -e NO_CHOWN= `#optional` \
+  -e MASTODON_PROMETHEUS_EXPORTER_ENABLED= `#optional` \
   -p 80:80 \
   -p 443:443 \
+  -p 9394:9394 `#optional` \
   -v /path/to/mastodon/config:/config \
   --restart unless-stopped \
   lscr.io/linuxserver/mastodon:develop
@@ -225,6 +229,7 @@ Containers are configured using parameters passed at runtime (such as those abov
 | :----: | --- |
 | `-p 80:80` | Port for web frontend |
 | `-p 443:443` | Port for web frontend |
+| `-p 9394` | Port for Prometheus metrics |
 | `-e PUID=1000` | for UserID - see below for explanation |
 | `-e PGID=1000` | for GroupID - see below for explanation |
 | `-e TZ=Etc/UTC` | specify a timezone to use, see this [list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List). |
@@ -265,6 +270,7 @@ Containers are configured using parameters passed at runtime (such as those abov
 | `-e SIDEKIQ_THREADS=5` | The number of threads for sidekiq to use. See [notes](https://docs.joinmastodon.org/admin/scaling/#sidekiq-threads). |
 | `-e DB_POOL=5` | The size of the DB connection pool, must be *at least* the same as `SIDEKIQ_THREADS`. See [notes](https://docs.joinmastodon.org/admin/scaling/#sidekiq-threads). |
 | `-e NO_CHOWN=` | Set to `true` to skip chown of /config on init. *READ THE APPLICATION NOTES BEFORE SETTING THIS*. |
+| `-e MASTODON_PROMETHEUS_EXPORTER_ENABLED=` | If set to `true`, Mastodon’s Ruby processes (web & Sidekiq) will enable the Prometheus instrumentation. |
 | `-v /config` | Contains all relevant configuration files. |
 
 ## Environment variables from files (Docker secrets)
@@ -429,6 +435,7 @@ Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64
 
 ## Versions
 
+* **21.10.25:** - Add prometheus exporter support.
 * **20.10.25:** - Add vips-heif.
 * **06.06.25:** - Rebase to Alpine 3.22, replace deprecated imagemagick with vips.
 * **26.08.24:** - Rebase to Alpine 3.20, enable [Active Record Encryption](https://github.com/mastodon/mastodon/pull/29831/files). Existing users should update their nginx confs to avoid http2 deprecation warnings.