From: Michael Tremer <michael.tremer@ipfire.org>
Date: Fri, 28 Nov 2025 13:09:01 +0000 (+0000)
Subject: graphs: unbound: Add a cache usage graph
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3ee85c05feb56c806605bfec2ea49baa8e7f1c94;p=telemetry.git

graphs: unbound: Add a cache usage graph

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/daemon/colors.h b/src/daemon/colors.h
index 70ae99b..b8f7148 100644
--- a/src/daemon/colors.h
+++ b/src/daemon/colors.h
@@ -88,6 +88,12 @@
 // Temperature
 #define COLOR_TEMPERATURE		COLOR_RED
 
+// DNS
+#define COLOR_DNS_KEYS			COLOR_RED
+#define COLOR_DNS_INFRA			COLOR_GREY
+#define COLOR_DNS_RRSETS		COLOR_BLUE
+#define COLOR_DNS_MSGS			COLOR_GREEN
+
 // CPU Colors
 
 static inline const char* COLOR_CPU(long i) {
diff --git a/src/daemon/graph.c b/src/daemon/graph.c
index 4042b96..f9c6a51 100644
--- a/src/daemon/graph.c
+++ b/src/daemon/graph.c
@@ -560,6 +560,11 @@ int td_graph_vlabel_days(td_ctx* ctx, td_graph* graph,
 	return __td_string_set(vlabel, length, _("Days"));
 }
 
+int td_graph_vlabel_objects(td_ctx* ctx, td_graph* graph,
+		const td_graph_render_options* options, const char* object, char* vlabel, size_t length) {
+	return __td_string_set(vlabel, length, _("Objects"));
+}
+
 int td_graph_vlabel_qps(td_ctx* ctx, td_graph* graph,
 		const td_graph_render_options* options, const char* object, char* vlabel, size_t length) {
 	return __td_string_set(vlabel, length, _("Queries Per Second"));
diff --git a/src/daemon/graph.h b/src/daemon/graph.h
index 5269f23..76f5deb 100644
--- a/src/daemon/graph.h
+++ b/src/daemon/graph.h
@@ -126,6 +126,9 @@ int td_graph_vlabel_bytes(td_ctx* ctx, td_graph* graph,
 int td_graph_vlabel_days(td_ctx* ctx, td_graph* graph,
 	const td_graph_render_options* options, const char* object, char* vlabel, size_t length);
 
+int td_graph_vlabel_objects(td_ctx* ctx, td_graph* graph,
+	const td_graph_render_options* options, const char* object, char* vlabel, size_t length);
+
 int td_graph_vlabel_qps(td_ctx* ctx, td_graph* graph,
 	const td_graph_render_options* options, const char* object, char* vlabel, size_t length);
 
diff --git a/src/daemon/graphs.c b/src/daemon/graphs.c
index 37242c6..e6253a4 100644
--- a/src/daemon/graphs.c
+++ b/src/daemon/graphs.c
@@ -70,6 +70,7 @@ static const td_graph_impl* graph_impls[] = {
 
 	// Unbound
 	&unbound_cache_performance_graph,
+	&unbound_cache_usage_graph,
 	&unbound_recursion_time_graph,
 
 	// Legacy
diff --git a/src/daemon/graphs/unbound.c b/src/daemon/graphs/unbound.c
index ef8aa45..33db5ab 100644
--- a/src/daemon/graphs/unbound.c
+++ b/src/daemon/graphs/unbound.c
@@ -73,6 +73,65 @@ const td_graph_impl unbound_cache_performance_graph = {
 	.upper_limit = LONG_MAX,
 };
 
+static int unbound_cache_usage_title(td_ctx* ctx, td_graph* graph,
+		const char* object, char* title, size_t length) {
+	return __td_string_set(title, length, _("DNS Cache Usage"));
+}
+
+static int unbound_cache_usage_render(td_ctx* ctx, td_graph* graph,
+		const td_graph_render_options* options, td_args* args, const char* object) {
+	int r;
+
+	// Load all sources
+	r = td_graph_require_source(graph, args, "unbound", NULL);
+	if (r < 0)
+		return r;
+
+	// Draw the stacked background first
+	DRAW_AREA_BACKGROUND(args, "cache_key_objects",   NULL, COLOR_DNS_KEYS, 0);
+	DRAW_AREA_BACKGROUND(args, "cache_infra_objects", NULL, COLOR_DNS_INFRA, STACKED);
+	DRAW_AREA_BACKGROUND(args, "cache_rrset_objects", NULL, COLOR_DNS_RRSETS, STACKED);
+	DRAW_AREA_BACKGROUND(args, "cache_msg_objects",   NULL, COLOR_DNS_MSGS, STACKED);
+
+	// Draw the area outlines afterwards
+	DRAW_AREA_OUTLINE_WITH_LABEL(args, "cache_key_objects", NULL,
+		COLOR_DNS_KEYS, 0, _("Key Objects"));
+	PRINT_CAMM(args, "cache_key_objects", NULL, LARGE_INTEGER);
+
+	DRAW_AREA_OUTLINE_WITH_LABEL(args, "cache_infra_objects", NULL,
+		COLOR_DNS_INFRA, STACKED, _("Infrastructure Objects"));
+	PRINT_CAMM(args, "cache_infra_objects", NULL, LARGE_INTEGER);
+
+	DRAW_AREA_OUTLINE_WITH_LABEL(args, "cache_rrset_objects", NULL,
+		COLOR_DNS_RRSETS, STACKED, _("RRSet Objects"));
+	PRINT_CAMM(args, "cache_rrset_objects", NULL, LARGE_INTEGER);
+
+	DRAW_AREA_OUTLINE_WITH_LABEL(args, "cache_msg_objects", NULL,
+		COLOR_DNS_MSGS, STACKED, _("Message Objects"));
+	PRINT_CAMM(args, "cache_msg_objects", NULL, LARGE_INTEGER);
+
+	PRINT_EMPTY_LINE(args);
+
+	// Header
+	PRINT_HEADER4(args, _("Current"), _("Average"), _("Minimum"), _("Maximum"));
+
+	return 0;
+}
+
+const td_graph_impl unbound_cache_usage_graph = {
+	.name    = "UnboundCacheUsage",
+	.render  = unbound_cache_usage_render,
+	.title   = unbound_cache_usage_title,
+	.vlabel  = td_graph_vlabel_objects,
+
+	// Flags
+	.flags   = TELEMETRY_GRAPH_REVERSE,
+
+	// Limits
+	.lower_limit = 0,
+	.upper_limit = LONG_MAX,
+};
+
 static int unbound_recursion_time_title(td_ctx* ctx, td_graph* graph,
 		const char* object, char* title, size_t length) {
 	return __td_string_set(title, length, _("DNS Recursion Time"));
diff --git a/src/daemon/graphs/unbound.h b/src/daemon/graphs/unbound.h
index 54f10fc..669e352 100644
--- a/src/daemon/graphs/unbound.h
+++ b/src/daemon/graphs/unbound.h
@@ -24,6 +24,7 @@
 #include "../graph.h"
 
 extern const td_graph_impl unbound_cache_performance_graph;
+extern const td_graph_impl unbound_cache_usage_graph;
 extern const td_graph_impl unbound_recursion_time_graph;
 
 #endif /* TELEMETRY_GRAPH_UNBOUND_H */