feat(web): make footer legal links configurable

Add a "main.footer-links" config option so the footer Imprint and
Privacy Policy links can point at internal pages (default) or external
URLs. External http(s) targets open in a new tab; empty/unset values
fall back to the built-in /imprint and /privacy routes, keeping the
existing ./var/*.tmpl override mechanism intact.

Closes #517

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Entire-Checkpoint: c5dca72c848f

configs/config.json

@@ -18,6 +18,10 @@
       "trigger": 180,
       "resolutions": [240, 60]
     },
+    "footer-links": {
+      "imprint": "/imprint",
+      "privacy": "/privacy"
+    },
     "api-subjects": {
       "subject-job-event": "cc.job.event",
       "subject-node-state": "cc.node.state"

init/README.md

@@ -37,6 +37,13 @@ cp privacy.tmpl /opt/monitoring/cc-backend/var/
 # Ensure your logo, and any images you use in your login template has a suitable size.
 cp -R img /opt/monitoring/cc-backend/img
 
+# 4b. (Optional) Instead of overriding imprint.tmpl/privacy.tmpl, you can point the
+# footer links to external pages via "main.footer-links" in config.json:
+#   "footer-links": { "imprint": "https://example.com/imprint", "privacy": "https://example.com/privacy" }
+# Values may be internal paths (default "/imprint", "/privacy") or external URLs;
+# external URLs (http/https) open in a new browser tab. An empty value falls back
+# to the internal page.
+
 # 5. Copy the systemd service unit file. You may adopt it to your needs.
 sudo cp ./init/clustercockpit.service /etc/systemd/system/clustercockpit.service
 

internal/config/config.go

@@ -80,6 +80,18 @@ type ProgramConfig struct {
 
 	// Database tuning configuration
 	DbConfig *DbConfig `json:"db-config"`
+
+	// Optional external/legal links shown in the footer.
+	FooterLinks FooterLinksConfig `json:"footer-links"`
+}
+
+// FooterLinksConfig configures the legal/footer links rendered in the UI.
+// Each value may be an internal path (e.g. "/imprint") or an external URL.
+type FooterLinksConfig struct {
+	// Target URL/path for the "Imprint" footer entry.
+	Imprint string `json:"imprint"`
+	// Target URL/path for the "Privacy Policy" footer entry.
+	Privacy string `json:"privacy"`
 }
 
 type DbConfig struct {
@@ -145,6 +157,10 @@ var Keys ProgramConfig = ProgramConfig{
 	SessionMaxAge:             "168h",
 	StopJobsExceedingWalltime: 0,
 	ShortRunningJobsDuration:  5 * 60,
+	FooterLinks: FooterLinksConfig{
+		Imprint: "/imprint",
+		Privacy: "/privacy",
+	},
 }
 
 func Init(mainConfig json.RawMessage) {

internal/config/schema.go

@@ -133,6 +133,20 @@ var configSchema = `
       },
       "required": ["subject-job-event", "subject-node-state"]
     },
+    "footer-links": {
+      "description": "Optional footer links for legal pages (imprint/privacy). Each value may be an internal path or an external URL.",
+      "type": "object",
+      "properties": {
+        "imprint": {
+          "description": "Target URL/path for the footer imprint link.",
+          "type": "string"
+        },
+        "privacy": {
+          "description": "Target URL/path for the footer privacy link.",
+          "type": "string"
+        }
+      }
+    },
     "nodestate-retention": {
       "description": "Node state retention configuration for cleaning up old node_state rows.",
       "type": "object",

web/templates/base.tmpl

@@ -52,8 +52,8 @@
             {{block "footer" .}}
                 <footer class="site-footer bg-light">
                     <ul class="footer-list">
-                        <li class="footer-list-item"><a class="link-secondary fs-5" href="/imprint" title="Imprint" rel="nofollow">Imprint</a></li>
-                        <li class="footer-list-item"><a class="link-secondary fs-5" href="/privacy" title="Privacy Policy" rel="nofollow">Privacy Policy</a></li>
+                        <li class="footer-list-item"><a class="link-secondary fs-5" href="{{ .FooterLinks.Imprint.URL }}" title="Imprint"{{ if .FooterLinks.Imprint.External }} target="_blank" rel="noopener noreferrer"{{ else }} rel="nofollow"{{ end }}>Imprint</a></li>
+                        <li class="footer-list-item"><a class="link-secondary fs-5" href="{{ .FooterLinks.Privacy.URL }}" title="Privacy Policy"{{ if .FooterLinks.Privacy.External }} target="_blank" rel="noopener noreferrer"{{ else }} rel="nofollow"{{ end }}>Privacy Policy</a></li>
                     </ul>
                     <ul class="build-list">
                     <li class="build-list-item">Version {{ .Build.Version }}</li>

web/web.go

@@ -74,6 +74,32 @@ type PlotConfiguration struct {
 	ColorScheme     []string `json:"color-scheme"`
 }
 
+const (
+	defaultImprintLink = "/imprint"
+	defaultPrivacyLink = "/privacy"
+)
+
+// FooterLink is the render-time representation of a single footer legal link.
+type FooterLink struct {
+	URL      string // Resolved target: internal path or external URL.
+	External bool   // True if the target is an external URL (opened in a new tab).
+}
+
+// FooterLinks holds the resolved legal links shown in the site footer.
+type FooterLinks struct {
+	Imprint FooterLink
+	Privacy FooterLink
+}
+
+// resolveFooterLink falls back to def when v is empty and flags external URLs.
+func resolveFooterLink(v, def string) FooterLink {
+	if v == "" {
+		v = def
+	}
+	external := strings.HasPrefix(v, "http://") || strings.HasPrefix(v, "https://")
+	return FooterLink{URL: v, External: external}
+}
+
 var UIDefaults = WebConfig{
 	JobList: JobListConfig{
 		UsePaging:     false,
@@ -266,6 +292,7 @@ type Page struct {
 	Config        map[string]any         // UI settings for the currently logged in user (e.g. line width, ...)
 	Resampling    *config.ResampleConfig // If not nil, defines resampling trigger and resolutions
 	Redirect      string                 // The originally requested URL, for intermediate login handling
+	FooterLinks   FooterLinks            // Resolved legal links for the site footer
 }
 
 func RenderTemplate(rw http.ResponseWriter, file string, page *Page) {
@@ -289,6 +316,11 @@ func RenderTemplate(rw http.ResponseWriter, file string, page *Page) {
 		}
 	}
 
+	page.FooterLinks = FooterLinks{
+		Imprint: resolveFooterLink(config.Keys.FooterLinks.Imprint, defaultImprintLink),
+		Privacy: resolveFooterLink(config.Keys.FooterLinks.Privacy, defaultPrivacyLink),
+	}
+
 	cclog.Debugf("Page config : %v\n", page.Config)
 	if err := t.Execute(rw, page); err != nil {
 		cclog.Errorf("Template error: %s", err.Error())