From 9a0990857d1efdbfa155989be512cd2f15f0944f Mon Sep 17 00:00:00 2001
From: Paul Norman <penorman@mac.com>
Date: Sat, 14 Jun 2025 18:32:21 -0700
Subject: [PATCH] Re-render ocean layers weekly

This is a brute-force approach to updating the coastline
---
 cookbooks/vectortile/attributes/default.rb    |  6 +++-
 cookbooks/vectortile/recipes/default.rb       | 33 +++++++++++++++++++
 .../templates/default/render-lowzoom.erb      |  2 +-
 .../templates/default/render-ocean.erb        | 11 +++++++
 4 files changed, 50 insertions(+), 2 deletions(-)
 create mode 100644 cookbooks/vectortile/templates/default/render-ocean.erb

diff --git a/cookbooks/vectortile/attributes/default.rb b/cookbooks/vectortile/attributes/default.rb
index e08b3dce2..4babf374a 100644
--- a/cookbooks/vectortile/attributes/default.rb
+++ b/cookbooks/vectortile/attributes/default.rb
@@ -6,9 +6,13 @@ default[:vectortile][:serve][:mode] = :live
 default[:vectortile][:replication][:url] = "https://osm-planet-eu-central-1.s3.dualstack.eu-central-1.amazonaws.com/planet/replication/minute"
 default[:vectortile][:replication][:enabled] = true
 default[:vectortile][:replication][:tileupdate] = true
-default[:vectortile][:replication][:threads] = node.cpu_cores
+default[:vectortile][:replication][:threads] = [0.5 * node.cpu_cores, 2].min.ceil
 default[:vectortile][:rerender][:lowzoom][:enabled] = true
+default[:vectortile][:rerender][:lowzoom][:threads] = [0.5 * node.cpu_cores, 2].min.ceil
 default[:vectortile][:rerender][:lowzoom][:maxzoom] = 9
+default[:vectortile][:rerender][:ocean][:enabled] = true
+default[:vectortile][:rerender][:ocean][:threads] = [0.5 * node.cpu_cores, 2].min.ceil
+default[:vectortile][:rerender][:ocean][:minzoom] = node[:vectortile][:rerender][:lowzoom][:maxzoom] + 1
 
 default[:vectortile][:tilekiln][:version] = "0.8.1"
 default[:vectortile][:spirit][:version] = "033a4117ec3604e28824b3f3608f5d163ef1b450"
diff --git a/cookbooks/vectortile/recipes/default.rb b/cookbooks/vectortile/recipes/default.rb
index b32fa1050..b47815f16 100644
--- a/cookbooks/vectortile/recipes/default.rb
+++ b/cookbooks/vectortile/recipes/default.rb
@@ -332,6 +332,39 @@ else
   end
 end
 
+template "/usr/local/bin/render-ocean" do
+  source "render-ocean.erb"
+  owner "root"
+  group "root"
+  mode "755"
+  variables :tilekiln_bin => "#{tilekiln_directory}/bin/tilekiln", :source_database => "spirit", :storage_database => "tiles", :config_path => shortbread_config, :min_zoom => node[:vectortile][:rerender][:ocean][:minzoom], :max_zoom => 14
+end
+
+systemd_service "render-ocean" do
+  description "Render ocean tiles"
+  user "tileupdate"
+  after "postgresql.service"
+  wants "postgresql.service"
+  restrict_address_families "AF_UNIX"
+  sandbox true
+  exec_start "/usr/local/bin/render-ocean"
+end
+
+systemd_timer "render-ocean" do
+  description "Render ocean tiles"
+  on_calendar "Sat 01:00 #{node[:timezone]}"
+end
+
+if node[:vectortile][:rerender][:ocean][:enabled]
+  service "render-ocean.timer" do
+    action [:enable, :start]
+  end
+else
+  service "render-ocean.timer" do
+    action [:stop, :disable]
+  end
+end
+
 package %w[
   ruby-pg
   ruby-webrick
diff --git a/cookbooks/vectortile/templates/default/render-lowzoom.erb b/cookbooks/vectortile/templates/default/render-lowzoom.erb
index b14550f40..ced5c81a3 100644
--- a/cookbooks/vectortile/templates/default/render-lowzoom.erb
+++ b/cookbooks/vectortile/templates/default/render-lowzoom.erb
@@ -10,7 +10,7 @@ vacuumdb --analyze \
 <%= @tilekiln_bin %> generate zooms \
 --source-dbname "<%= @source_database %>" \
 --storage-dbname "<%= @storage_database %>" \
---num-threads "<%= node[:vectortile][:replication][:threads] %>" \
+--num-threads "<%= node[:vectortile][:rerender][:lowzoom][:threads] %>" \
 --config <%= @config_path %> \
 --min-zoom <%= @min_zoom %> \
 --max-zoom <%= @max_zoom %>
diff --git a/cookbooks/vectortile/templates/default/render-ocean.erb b/cookbooks/vectortile/templates/default/render-ocean.erb
new file mode 100644
index 000000000..56b7a1662
--- /dev/null
+++ b/cookbooks/vectortile/templates/default/render-ocean.erb
@@ -0,0 +1,11 @@
+#!/bin/sh
+set -eu
+export PGAPPNAME='render-ocean'
+
+<%= @tilekiln_bin %> generate zooms \
+--source-dbname "<%= @source_database %>" \
+--storage-dbname "<%= @storage_database %>" \
+--num-threads "<%= node[:vectortile][:rerender][:lowzoom][:threads] %>" \
+--config <%= @config_path %> \
+--min-zoom <%= @min_zoom %> \
+--max-zoom <%= @max_zoom %>
-- 
2.39.5