Modifications of renderd and render_list for my particular usage scenario.

• renderd, error logs
• render_list stats to /tmp/render_list.stats
• jemalloc appears to eat less memory in my usage scenario (~8GB vs ~40GB)

Install

sudo apt --yes install --reinstall ca-certificates

# Install build dependencies
sudo apt --no-install-recommends --yes install \
  apache2 \
  apache2-dev \
  cmake \
  curl \
  g++ \
  gcc \
  git \
  libcairo2-dev \
  libcurl4-openssl-dev \
  libglib2.0-dev \
  libiniparser-dev \
  libjemalloc-dev \
  libmapnik-dev

# Download, Build & Install `mod_tile`
export CMAKE_BUILD_PARALLEL_LEVEL=$(nproc)
cd /tmp
git clone --depth 1 https://github.com/normundsneimanis/mod_tile.git 
cd mod_tile
mkdir build
cd build
cmake -B . -S .. \
  -DCMAKE_BUILD_TYPE:STRING=Release \
  -DCMAKE_INSTALL_LOCALSTATEDIR:PATH=/var \
  -DCMAKE_INSTALL_PREFIX:PATH=/usr \
  -DCMAKE_INSTALL_RUNSTATEDIR:PATH=/run \
  -DCMAKE_INSTALL_SYSCONFDIR:PATH=/etc \
  -DMALLOC_LIB=jemalloc
cmake --build .
sudo cmake --install . --strip

Installed files to copy to Docker

/var/cache/renderd/tiles
/run/renderd
/etc/apache2/mods-available/tile.load
/etc/renderd.conf
/usr/lib/apache2/modules/mod_tile.so
/usr/bin/render_expired
/usr/bin/render_list
/usr/bin/render_old
/usr/bin/render_speedtest
/usr/bin/renderd
/share/man/man1/render_expired.1
/share/man/man1/render_list.1
/share/man/man1/render_old.1
/share/man/man1/render_speedtest.1
/share/man/man1/renderd.1
/share/man/man5/renderd.conf.5