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diff --git a/changelog.d/release-to-docker.add b/changelog.d/release-to-docker.add
new file mode 100644
index 000000000..5fbf611a5
--- /dev/null
+++ b/changelog.d/release-to-docker.add
@@ -0,0 +1 @@
+Add instructions on how to run a release in docker, to make it easier to run on older distros.
diff --git a/docs/installation/otp_en.md b/docs/installation/otp_en.md
index 86efa27f8..123dccf3a 100644
--- a/docs/installation/otp_en.md
+++ b/docs/installation/otp_en.md
@@ -1,312 +1,315 @@
# Installing on Linux using OTP releases
{! backend/installation/otp_vs_from_source.include !}
This guide covers a installation using OTP releases as built by the Pleroma project, it is meant as a fallback to distribution packages/recipes which are the preferred installation method.
To install Pleroma from source, please check out the corresponding guide for your distro.
## Pre-requisites
* A machine you have root access to running Debian GNU/Linux or compatible (eg. Ubuntu), or Alpine on `x86_64`, `aarch64` or `armv7l` CPU. If you are not sure what you are running see [Detecting flavour section](#detecting-flavour) below
* A (sub)domain pointed to the machine
You will be running commands as root. If you aren't root already, please elevate your privileges by executing `sudo -i`/`su`.
Similarly to other binaries, OTP releases tend to be only compatible with the distro they are built on, as such this guide focuses only on Debian/Ubuntu and Alpine.
+!!! note
+ If you get `GLIBC_... not found` errors on Debian/Ubuntu, you can run the OTP release from `/opt/pleroma` inside a newer distro container without upgrading the host. See [`release_to_docker_en.md`](release_to_docker_en.md).
+
### Detecting flavour
Paste the following into the shell:
```sh
arch="$(uname -m)";if [ "$arch" = "x86_64" ];then arch="amd64";elif [ "$arch" = "armv7l" ];then arch="arm";elif [ "$arch" = "aarch64" ];then arch="arm64";else echo "Unsupported arch: $arch">&2;fi;if getconf GNU_LIBC_VERSION>/dev/null;then libc_postfix="";elif [ "$(ldd 2>&1|head -c 9)" = "musl libc" ];then libc_postfix="-musl";elif [ "$(find /lib/libc.musl*|wc -l)" ];then libc_postfix="-musl";else echo "Unsupported libc">&2;fi;echo "$arch$libc_postfix"
```
This should give your flavour string. If not this just means that we don't build releases for your platform, you can still try installing from source.
### Installing the required packages
Other than things bundled in the OTP release Pleroma depends on:
* curl (to download the release build)
* unzip (needed to unpack release builds)
* ncurses (ERTS won't run without it)
* PostgreSQL (also utilizes extensions in postgresql-contrib)
* nginx (could be swapped with another reverse proxy but this guide covers only it)
* certbot (for Let's Encrypt certificates, could be swapped with another ACME client, but this guide covers only it)
* libmagic/file
=== "Alpine"
```
awk 'NR==2' /etc/apk/repositories | sed 's/main/community/' | tee -a /etc/apk/repositories
apk update
apk add curl unzip ncurses postgresql postgresql-contrib nginx certbot file-dev
```
=== "Debian/Ubuntu"
```
apt install curl unzip libncurses5 postgresql postgresql-contrib nginx certbot libmagic-dev
```
### Installing optional packages
Per [`docs/installation/optional/media_graphics_packages.md`](optional/media_graphics_packages.md):
* ImageMagick
* ffmpeg
* exiftool
=== "Alpine"
```
apk update
apk add imagemagick ffmpeg exiftool
```
=== "Debian/Ubuntu"
```
apt install imagemagick ffmpeg libimage-exiftool-perl
```
## Setup
### Configuring PostgreSQL
#### (Optional) Installing RUM indexes
!!! warning
It is recommended to use PostgreSQL v11 or newer. We have seen some minor issues with lower PostgreSQL versions.
RUM indexes are an alternative indexing scheme that is not included in PostgreSQL by default. You can read more about them on the [Configuration page](../configuration/cheatsheet.md#rum-indexing-for-full-text-search). They are completely optional and most of the time are not worth it, especially if you are running a single user instance (unless you absolutely need ordered search results).
=== "Alpine"
```
apk add git build-base postgresql-dev
git clone https://github.com/postgrespro/rum /tmp/rum
cd /tmp/rum
make USE_PGXS=1
make USE_PGXS=1 install
cd
rm -r /tmp/rum
```
=== "Debian/Ubuntu"
```
# Available only on Buster/19.04
apt install postgresql-11-rum
```
#### (Optional) Performance configuration
It is encouraged to check [Optimizing your PostgreSQL performance](../configuration/postgresql.md) document, for tips on PostgreSQL tuning.
Restart PostgreSQL to apply configuration changes:
=== "Alpine"
```
rc-service postgresql restart
```
=== "Debian/Ubuntu"
```
systemctl restart postgresql
```
### Installing Pleroma
```sh
# Create a Pleroma user
adduser --system --shell /bin/false --home /opt/pleroma pleroma
# Set the flavour environment variable to the string you got in Detecting flavour section.
# For example if the flavour is `amd64-musl` the command will be
export FLAVOUR="amd64-musl"
# Clone the release build into a temporary directory and unpack it
sudo -Hu pleroma "
curl 'https://git.pleroma.social/api/v4/projects/2/jobs/artifacts/stable/download?job=$FLAVOUR' -o /tmp/pleroma.zip
unzip /tmp/pleroma.zip -d /tmp/
"
# Move the release to the home directory and delete temporary files
sudo -Hu pleroma "
mv /tmp/release/* /opt/pleroma
rmdir /tmp/release
rm /tmp/pleroma.zip
"
# Create uploads directory and set proper permissions (skip if planning to use a remote uploader)
# Note: It does not have to be `/var/lib/pleroma/uploads`, the config generator will ask about the upload directory later
mkdir -p /var/lib/pleroma/uploads
chown -R pleroma /var/lib/pleroma
# Create custom public files directory (custom emojis, frontend bundle overrides, robots.txt, etc.)
# Note: It does not have to be `/var/lib/pleroma/static`, the config generator will ask about the custom public files directory later
mkdir -p /var/lib/pleroma/static
chown -R pleroma /var/lib/pleroma
# Create a config directory
mkdir -p /etc/pleroma
chown -R pleroma /etc/pleroma
# Run the config generator
sudo -Hu pleroma "./bin/pleroma_ctl instance gen --output /etc/pleroma/config.exs --output-psql /tmp/setup_db.psql"
# Create the postgres database
sudo -u postgres -s $SHELL -lc "psql -f /tmp/setup_db.psql"
# Create the database schema
sudo -Hu pleroma "./bin/pleroma_ctl migrate"
# If you have installed RUM indexes uncommend and run
# sudo -Hu pleroma "./bin/pleroma_ctl migrate --migrations-path priv/repo/optional_migrations/rum_indexing/"
# Start the instance to verify that everything is working as expected
sudo -Hu pleroma "./bin/pleroma daemon"
# Wait for about 20 seconds and query the instance endpoint, if it shows your uri, name and email correctly, you are configured correctly
sleep 20 && curl http://localhost:4000/api/v1/instance
# Stop the instance
sudo -Hu pleroma "./bin/pleroma stop"
```
### Setting up nginx and getting Let's Encrypt SSL certificaties
#### Get a Let's Encrypt certificate
```sh
certbot certonly --standalone --preferred-challenges http -d yourinstance.tld
```
#### Copy Pleroma nginx configuration to the nginx folder
The location of nginx configs is dependent on the distro
=== "Alpine"
```
cp /opt/pleroma/installation/pleroma.nginx /etc/nginx/conf.d/pleroma.conf
```
=== "Debian/Ubuntu"
```
cp /opt/pleroma/installation/pleroma.nginx /etc/nginx/sites-available/pleroma.conf
ln -s /etc/nginx/sites-available/pleroma.conf /etc/nginx/sites-enabled/pleroma.conf
```
If your distro does not have either of those you can append `include /etc/nginx/pleroma.conf` to the end of the http section in /etc/nginx/nginx.conf and
```sh
cp /opt/pleroma/installation/pleroma.nginx /etc/nginx/pleroma.conf
```
#### Edit the nginx config
```sh
# Replace example.tld with your (sub)domain
$EDITOR path-to-nginx-config
# Verify that the config is valid
nginx -t
```
#### (Strongly recommended) serve media on another domain
Refer to the [Hardening your instance](../configuration/hardening.md) document on how to serve media on another domain. We STRONGLY RECOMMEND you to do this to minimize attack vectors.
#### Start nginx
=== "Alpine"
```
rc-service nginx start
```
=== "Debian/Ubuntu"
```
systemctl start nginx
```
At this point if you open your (sub)domain in a browser you should see a 502 error, that's because Pleroma is not started yet.
### Setting up a system service
=== "Alpine"
```
# Copy the service into a proper directory
cp /opt/pleroma/installation/init.d/pleroma /etc/init.d/pleroma
# Start pleroma and enable it on boot
rc-service pleroma start
rc-update add pleroma
```
=== "Debian/Ubuntu"
```
# Copy the service into a proper directory
cp /opt/pleroma/installation/pleroma.service /etc/systemd/system/pleroma.service
# Start pleroma and enable it on boot
systemctl start pleroma
systemctl enable pleroma
```
If everything worked, you should see Pleroma-FE when visiting your domain. If that didn't happen, try reviewing the installation steps, starting Pleroma in the foreground and seeing if there are any errors.
Questions about the installation or didn’t it work as it should be, ask in [#pleroma:libera.chat](https://matrix.to/#/#pleroma:libera.chat) via Matrix or **#pleroma** on **libera.chat** via IRC, you can also [file an issue on our Gitlab](https://git.pleroma.social/pleroma/pleroma-support/issues/new).
## Post installation
### Setting up auto-renew of the Let's Encrypt certificate
```sh
# Create the directory for webroot challenges
mkdir -p /var/lib/letsencrypt
# Uncomment the webroot method
$EDITOR path-to-nginx-config
# Verify that the config is valid
nginx -t
```
=== "Alpine"
```
# Restart nginx
rc-service nginx restart
# Start the cron daemon and make it start on boot
rc-service crond start
rc-update add crond
# Ensure the webroot menthod and post hook is working
certbot renew --cert-name yourinstance.tld --webroot -w /var/lib/letsencrypt/ --dry-run --post-hook 'rc-service nginx reload'
# Add it to the daily cron
echo '#!/bin/sh
certbot renew --cert-name yourinstance.tld --webroot -w /var/lib/letsencrypt/ --post-hook "rc-service nginx reload"
' > /etc/periodic/daily/renew-pleroma-cert
chmod +x /etc/periodic/daily/renew-pleroma-cert
# If everything worked the output should contain /etc/cron.daily/renew-pleroma-cert
run-parts --test /etc/periodic/daily
```
=== "Debian/Ubuntu"
```
# Restart nginx
systemctl restart nginx
# Ensure the webroot menthod and post hook is working
certbot renew --cert-name yourinstance.tld --webroot -w /var/lib/letsencrypt/ --dry-run --post-hook 'systemctl reload nginx'
# Add it to the daily cron
echo '#!/bin/sh
certbot renew --cert-name yourinstance.tld --webroot -w /var/lib/letsencrypt/ --post-hook "systemctl reload nginx"
' > /etc/cron.daily/renew-pleroma-cert
chmod +x /etc/cron.daily/renew-pleroma-cert
# If everything worked the output should contain /etc/cron.daily/renew-pleroma-cert
run-parts --test /etc/cron.daily
```
## Create your first user and set as admin
```sh
cd /opt/pleroma
su pleroma -s $SHELL -lc "./bin/pleroma_ctl user new joeuser joeuser@sld.tld --admin"
```
This will create an account withe the username of 'joeuser' with the email address of joeuser@sld.tld, and set that user's account as an admin. This will result in a link that you can paste into the browser, which logs you in and enables you to set the password.
## Further reading
{! backend/installation/further_reading.include !}
## Questions
Questions about the installation or didn’t it work as it should be, ask in [#pleroma:libera.chat](https://matrix.to/#/#pleroma:libera.chat) via Matrix or **#pleroma** on **libera.chat** via IRC, you can also [file an issue on our Gitlab](https://git.pleroma.social/pleroma/pleroma-support/issues/new).
diff --git a/docs/installation/release_to_docker_en.md b/docs/installation/release_to_docker_en.md
new file mode 100644
index 000000000..a1fd165ac
--- /dev/null
+++ b/docs/installation/release_to_docker_en.md
@@ -0,0 +1,61 @@
+# Running OTP releases via Docker (glibc shim)
+
+Pleroma OTP releases are built on specific distros. If your host OS is older than
+the build environment, you may hit runtime linker errors such as:
+
+```
+/lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.38' not found
+```
+
+If you don't want to upgrade your host OS, you can run the existing OTP release
+from `/opt/pleroma` inside an Ubuntu 24.04 container while keeping your existing
+host config and data directories.
+
+This approach uses a small "shim" container image to provide a newer `glibc`.
+It is **not** the official Pleroma Docker image.
+
+## Requirements
+
+- Docker Engine + the Docker Compose plugin on the host
+- Root access (or equivalent access to the Docker socket)
+- Existing OTP release in `/opt/pleroma`
+- Existing config in `/etc/pleroma` and data in `/var/lib/pleroma`
+
+## Setup
+
+1. Copy the provided templates:
+
+ ```sh
+ mkdir -p /etc/pleroma/container
+ cp -a /opt/pleroma/installation/release-to-docker/* /etc/pleroma/container/
+ ```
+
+2. Build the shim image:
+
+ ```sh
+ cd /etc/pleroma/container
+ docker compose build
+ ```
+
+3. Replace your systemd unit:
+
+ ```sh
+ cp /etc/pleroma/container/pleroma.service /etc/systemd/system/pleroma.service
+ systemctl daemon-reload
+ systemctl enable --now pleroma
+ journalctl -u pleroma -f
+ ```
+
+## Running migrations / `pleroma_ctl`
+
+Migrations are run automatically by default when the container starts. You can
+disable this by setting `PLEROMA_RUN_MIGRATIONS=0` in
+`/etc/pleroma/container/docker-compose.yml`.
+
+To run admin commands inside the container:
+
+```sh
+cd /etc/pleroma/container
+docker compose exec pleroma /opt/pleroma/bin/pleroma_ctl status
+docker compose run --rm --no-deps pleroma /opt/pleroma/bin/pleroma_ctl migrate
+```
diff --git a/installation/release-to-docker/Dockerfile b/installation/release-to-docker/Dockerfile
new file mode 100644
index 000000000..0ffeb5d5b
--- /dev/null
+++ b/installation/release-to-docker/Dockerfile
@@ -0,0 +1,26 @@
+FROM ubuntu:24.04
+
+ENV DEBIAN_FRONTEND=noninteractive \
+ LANG=C.UTF-8 \
+ LC_ALL=C.UTF-8
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+ ca-certificates \
+ gosu \
+ libstdc++6 \
+ libncurses6 libncursesw6 \
+ openssl libssl3 \
+ libmagic1t64 file \
+ postgresql-client \
+ ffmpeg imagemagick libimage-exiftool-perl \
+ libvips42t64 \
+ unzip \
+ curl \
+ && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /opt/pleroma
+
+COPY pleroma-host-release-entrypoint.sh /usr/local/bin/pleroma-host-release-entrypoint.sh
+RUN chmod +x /usr/local/bin/pleroma-host-release-entrypoint.sh
+ENTRYPOINT ["/usr/local/bin/pleroma-host-release-entrypoint.sh"]
+CMD ["/opt/pleroma/bin/pleroma", "start"]
diff --git a/installation/release-to-docker/README.md b/installation/release-to-docker/README.md
new file mode 100644
index 000000000..4129bd94b
--- /dev/null
+++ b/installation/release-to-docker/README.md
@@ -0,0 +1,66 @@
+# Run OTP releases on older glibc using Docker
+
+Pleroma OTP releases are built on specific distros and may require a newer `glibc`
+than your host has. A typical failure looks like:
+
+```
+... /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.38' not found ...
+```
+
+If you don't want to upgrade your host OS, you can run the existing OTP release
+from `/opt/pleroma` inside an Ubuntu 24.04 container while keeping your existing
+host paths (`/etc/pleroma`, `/var/lib/pleroma`, etc.).
+
+This folder provides a "shim" container + systemd unit. It is **not** the Pleroma
+Docker image.
+
+## What this does
+
+- Builds a small Ubuntu 24.04 image with runtime libs (including newer `glibc`).
+- Mounts your existing host release at `/opt/pleroma` into the container.
+- Runs as the same UID/GID that owns `/opt/pleroma` on the host (via `gosu`).
+- Optionally runs migrations automatically on container start.
+- Uses `network_mode: host` so your existing config that talks to `localhost`
+ keeps working.
+
+## Setup (Debian/Ubuntu host)
+
+1. Install Docker Engine + the Docker Compose plugin.
+2. Copy these files to a stable location (example: `/etc/pleroma/container`):
+
+ ```
+ mkdir -p /etc/pleroma/container
+ cp -a /opt/pleroma/installation/release-to-docker/* /etc/pleroma/container/
+ ```
+
+3. Build the shim image:
+
+ ```
+ cd /etc/pleroma/container
+ docker compose build
+ ```
+
+4. Replace your systemd unit:
+
+ ```
+ cp /etc/pleroma/container/pleroma.service /etc/systemd/system/pleroma.service
+ systemctl daemon-reload
+ systemctl enable --now pleroma
+ journalctl -u pleroma -f
+ ```
+
+## Running `pleroma_ctl`
+
+Since the host binary may not run on older `glibc`, run admin commands inside the
+container:
+
+```
+cd /etc/pleroma/container
+docker compose exec pleroma /opt/pleroma/bin/pleroma_ctl status
+docker compose run --rm --no-deps pleroma /opt/pleroma/bin/pleroma_ctl migrate
+```
+
+## Configuration notes
+
+- Migrations run automatically by default.
+ - Set `PLEROMA_RUN_MIGRATIONS=0` in `docker-compose.yml` to disable.
diff --git a/installation/release-to-docker/docker-compose.yml b/installation/release-to-docker/docker-compose.yml
new file mode 100644
index 000000000..043803241
--- /dev/null
+++ b/installation/release-to-docker/docker-compose.yml
@@ -0,0 +1,22 @@
+services:
+ pleroma:
+ build:
+ context: .
+ dockerfile: Dockerfile
+ image: pleroma-host-release-wrapper:ubuntu24
+ init: true
+ network_mode: host
+ restart: unless-stopped
+ environment:
+ HOME: /opt/pleroma
+ LANG: C.UTF-8
+ LC_ALL: C.UTF-8
+ ELIXIR_ERL_OPTIONS: "+fnu"
+ # Set to 0 to skip running migrations on container start.
+ PLEROMA_RUN_MIGRATIONS: "1"
+ volumes:
+ # Existing OTP release installation (host)
+ - /opt/pleroma:/opt/pleroma:rw
+ # Existing config + uploads + static (host)
+ - /etc/pleroma:/etc/pleroma:rw
+ - /var/lib/pleroma:/var/lib/pleroma:rw
diff --git a/installation/release-to-docker/pleroma-host-release-entrypoint.sh b/installation/release-to-docker/pleroma-host-release-entrypoint.sh
new file mode 100644
index 000000000..b9c035678
--- /dev/null
+++ b/installation/release-to-docker/pleroma-host-release-entrypoint.sh
@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+uid="${PLEROMA_UID:-}"
+gid="${PLEROMA_GID:-}"
+
+if [[ -z "${uid}" || -z "${gid}" ]]; then
+ uid="$(stat -c '%u' /opt/pleroma)"
+ gid="$(stat -c '%g' /opt/pleroma)"
+fi
+
+export HOME="${HOME:-/opt/pleroma}"
+
+if [[ "${PLEROMA_RUN_MIGRATIONS:-1}" != "0" && "${1:-}" == "/opt/pleroma/bin/pleroma" && "${2:-}" == "start" ]]; then
+ echo "Running migrations..."
+ gosu "${uid}:${gid}" /opt/pleroma/bin/pleroma_ctl migrate
+fi
+
+exec gosu "${uid}:${gid}" "$@"
diff --git a/installation/release-to-docker/pleroma.service b/installation/release-to-docker/pleroma.service
new file mode 100644
index 000000000..d3833363c
--- /dev/null
+++ b/installation/release-to-docker/pleroma.service
@@ -0,0 +1,16 @@
+[Unit]
+Description=Pleroma social network (OTP release via Docker glibc shim)
+After=network.target docker.service postgresql.service nginx.service
+Requires=docker.service
+
+[Service]
+Type=simple
+WorkingDirectory=/etc/pleroma/container
+ExecStart=/usr/bin/docker compose up --build --remove-orphans
+ExecStop=/usr/bin/docker compose down
+Restart=on-failure
+RestartSec=5s
+TimeoutStartSec=0
+
+[Install]
+WantedBy=multi-user.target

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