From 7c2435e718fa00c7796ec7b34ac922a704ecf465 Mon Sep 17 00:00:00 2001
From: Paul Norman <penorman@mac.com>
Date: Wed, 30 Apr 2025 16:48:41 -0700
Subject: [PATCH] vectortile: Rerender lowzoom tiles daily

---
 cookbooks/vectortile/attributes/default.rb    |  2 ++
 cookbooks/vectortile/recipes/default.rb       | 33 +++++++++++++++++++
 .../templates/default/render-lowzoom.erb      | 10 ++++++
 .../vectortile/inspec/rerender_spec.rb        |  7 ++++
 4 files changed, 52 insertions(+)
 create mode 100644 cookbooks/vectortile/templates/default/render-lowzoom.erb
 create mode 100644 test/integration/vectortile/inspec/rerender_spec.rb

diff --git a/cookbooks/vectortile/attributes/default.rb b/cookbooks/vectortile/attributes/default.rb
index 6ad85e7ec..4f642ba3b 100644
--- a/cookbooks/vectortile/attributes/default.rb
+++ b/cookbooks/vectortile/attributes/default.rb
@@ -7,6 +7,8 @@ default[:vectortile][:replication][:url] = "https://osm-planet-eu-central-1.s3.d
 default[:vectortile][:replication][:enabled] = true
 default[:vectortile][:replication][:tileupdate] = true
 default[:vectortile][:replication][:threads] = node.cpu_cores
+default[:vectortile][:rerender][:lowzoom][:enabled] = true
+default[:vectortile][:rerender][:lowzoom][:maxzoom] = 9
 
 default[:vectortile][:tilekiln][:version] = "0.7.1"
 default[:vectortile][:spirit][:version] = "7c68ecdd82606fd64dfe6e2ba7a1f1741afcc34c"
diff --git a/cookbooks/vectortile/recipes/default.rb b/cookbooks/vectortile/recipes/default.rb
index ce3424130..77bb9da82 100644
--- a/cookbooks/vectortile/recipes/default.rb
+++ b/cookbooks/vectortile/recipes/default.rb
@@ -293,6 +293,39 @@ else
   end
 end
 
+template "/usr/local/bin/render-lowzoom" do
+  source "render-lowzoom.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 => 0, :max_zoom => node[:vectortile][:rerender][:lowzoom][:maxzoom]
+end
+
+systemd_service "render-lowzoom" do
+  description "Render low zoom tiles"
+  user "tileupdate"
+  after "postgresql.service"
+  wants "postgresql.service"
+  restrict_address_families "AF_UNIX"
+  sandbox true
+  exec_start "/usr/local/bin/render-lowzoom"
+end
+
+systemd_timer "render-lowzoom" do
+  description "Render low zoom tiles"
+  on_calendar "23:00 #{node[:timezone]}"
+end
+
+if node[:vectortile][:rerender][:lowzoom][:enabled]
+  service "render-lowzoom.timer" do
+    action [:enable, :start]
+  end
+else
+  service "render-lowzoom.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
new file mode 100644
index 000000000..cc8c87ae6
--- /dev/null
+++ b/cookbooks/vectortile/templates/default/render-lowzoom.erb
@@ -0,0 +1,10 @@
+#!/bin/sh
+set -eu
+
+<%= @tilekiln_bin %> generate zooms \
+--source-dbname "<%= @source_database %>" \
+--storage-dbname "<%= @storage_database %>" \
+--num-threads "<%= node[:vectortile][:replication][:threads] %>" \
+--config <%= @config_path %> \
+--min-zoom <%= @min_zoom %> \
+--max-zoom <%= @max_zoom %>
diff --git a/test/integration/vectortile/inspec/rerender_spec.rb b/test/integration/vectortile/inspec/rerender_spec.rb
new file mode 100644
index 000000000..c5da181ec
--- /dev/null
+++ b/test/integration/vectortile/inspec/rerender_spec.rb
@@ -0,0 +1,7 @@
+describe file("/usr/local/bin/render-lowzoom") do
+  it { should be_executable.by_user("tileupdate") }
+end
+
+describe service("render-lowzoom") do
+  it { should be_installed }
+end
-- 
2.39.5