implement primary and secondary role, for replicationv0.5.0

1 files changed, 19 insertions, 0 deletions

diff --git a/internal/node/handler/metric.go b/internal/node/handler/metric.go
new file mode 100644
index 0000000..ced0096
--- /dev/null
+++ b/internal/node/handler/metric.go
@@ -0,0 +1,19 @@
+package handler
+
+import (
+	"github.com/google/trillian/monitoring"
+	"github.com/google/trillian/monitoring/prometheus"
+)
+
+var (
+	reqcnt  monitoring.Counter   // number of incoming http requests
+	rspcnt  monitoring.Counter   // number of valid http responses
+	latency monitoring.Histogram // request-response latency
+)
+
+func init() {
+	mf := prometheus.MetricFactory{}
+	reqcnt = mf.NewCounter("http_req", "number of http requests", "logid", "endpoint")
+	rspcnt = mf.NewCounter("http_rsp", "number of http requests", "logid", "endpoint", "status")
+	latency = mf.NewHistogram("http_latency", "http request-response latency", "logid", "endpoint", "status")
+}