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| author | Paul Buetow <paul@buetow.org> | 2026-01-28 19:00:17 +0200 |
|---|---|---|
| committer | Paul Buetow <paul@buetow.org> | 2026-01-28 19:00:17 +0200 |
| commit | 04fd17c7f7f6c489238cccc2b34f3f2b42a12c62 (patch) | |
| tree | 558765d2219384baa09e07ef4fa4268781a9c577 | |
| parent | 755ede6cdae8570037a7cf59218f2baebbcdd631 (diff) | |
Add cache-control headers to f3s fallback page
- Add meta tags to prevent browser caching of fallback page
- Add response header directives in relayd to set Cache-Control headers
- Prevents cached fallback page from being served when cluster comes back online
Amp-Thread-ID: https://ampcode.com/threads/T-019c0589-2021-71cc-a2ba-2cd942f4fdef
Co-authored-by: Amp <amp@ampcode.com>
| -rw-r--r-- | frontends/etc/relayd.conf.tpl | 9 | ||||
| -rw-r--r-- | frontends/var/www/htdocs/f3s_fallback/index.html | 3 |
2 files changed, 10 insertions, 2 deletions
diff --git a/frontends/etc/relayd.conf.tpl b/frontends/etc/relayd.conf.tpl index 0a7283f..88467bd 100644 --- a/frontends/etc/relayd.conf.tpl +++ b/frontends/etc/relayd.conf.tpl @@ -56,11 +56,16 @@ http protocol "https" { # For f3s hosts: use relay-level failover (f3s -> localhost backup) # Registry is special: needs explicit routing to port 30001 <% for my $host (@$f3s_hosts) { for my $prefix (@prefixes) { - if ($host eq 'registry.f3s.buetow.org') { -%> + if ($host eq 'registry.f3s.buetow.org') { -%> match request header "Host" value "<%= $prefix.$host -%>" forward to <f3s_registry> <% } } } -%> -} + + # Add cache-control headers to f3s fallback pages (served from localhost when cluster is down) + match response header set "Cache-Control" value "no-cache, no-store, must-revalidate" + match response header set "Pragma" value "no-cache" + match response header set "Expires" value "0" + } relay "https4" { listen on <%= $vio0_ip %> port 443 tls diff --git a/frontends/var/www/htdocs/f3s_fallback/index.html b/frontends/var/www/htdocs/f3s_fallback/index.html index a84151a..c872241 100644 --- a/frontends/var/www/htdocs/f3s_fallback/index.html +++ b/frontends/var/www/htdocs/f3s_fallback/index.html @@ -2,6 +2,9 @@ <html> <head> <title>Server turned off</title> + <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" /> + <meta http-equiv="Pragma" content="no-cache" /> + <meta http-equiv="Expires" content="0" /> <style> body { font-family: sans-serif; |