fix: serve f3s fallback page when cluster is down

- Add explicit httpd server blocks for f3s.buetow.org and *.f3s.buetow.org on port 8080
- These blocks serve /htdocs/f3s_fallback with request rewrite to /index.html
- Prevents httpd from falling back to blowfish.buetow.org's directory autoindex
- Now correctly shows fallback page for all f3s hosts when k3s cluster is unreachable

Amp-Thread-ID: https://ampcode.com/threads/T-019c00f6-c61d-772a-8fe2-dc0aee0a4ce2
Co-authored-by: Amp <amp@ampcode.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/frontends/etc/httpd.conf.tpl b/frontends/etc/httpd.conf.tpl
index 24889d5..5f4a769 100644
--- a/frontends/etc/httpd.conf.tpl
+++ b/frontends/etc/httpd.conf.tpl
@@ -39,6 +39,29 @@ server "<%= "$hostname.$domain" %>" {
   }
 }
 
+# f3s cluster fallback page on port 8080 when cluster is down
+server "f3s.buetow.org" {
+  listen on * port 8080
+  log style forwarded
+  location * {
+    # Rewrite all requests to /index.html to show fallback page regardless of path
+    request rewrite "/index.html"
+    root "/htdocs/f3s_fallback"
+  }
+}
+
+# Catch-all for any unmatched .f3s.buetow.org subdomain on port 8080
+# Serves fallback page when k3s cluster is down
+server "*.f3s.buetow.org" {
+  listen on * port 8080
+  log style forwarded
+  location * {
+    # Rewrite all requests to /index.html to show fallback page regardless of path
+    request rewrite "/index.html"
+    root "/htdocs/f3s_fallback"
+  }
+}
+
 # Gemtexter hosts
 <% for my $host (qw/foo.zone stats.foo.zone/) { for my $prefix (@prefixes) { -%>
 server "<%= $prefix.$host %>" {