feat(gantry): improve cold-start distribution and benchmark automation

.dockerignore

@@ -46,6 +46,22 @@ README.md
 
 # Local env files
 .envrc
+.env
+.env.*
+**/.env
+**/.env.*
+!**/.env.example
+*.kubeconfig
+**/*kubeconfig*
+*.pem
+*.key
+**/id_rsa
+**/id_ed25519
+**/.azure/
+**/.aws/
+**/.config/gcloud/
+hack/gantry-benchmark/env.local
+hack/gantry-benchmark/deploy.env
 
 # OS files
 .DS_Store

.gitignore

@@ -2,6 +2,7 @@
 bin/
 !cmd/unbounded-storage/src/bin/
 /gantry
+/gantry-benchmark
 /dist/
 build/
 inventory.db

cmd/gantry/agent_byte_metrics_test.go

@@ -13,6 +13,7 @@ func TestByteMetricFamiliesMaterializeBoundedLabelsAtStartup(t *testing.T) {
 	reg := metrics.New()
 	_ = newPhase1Metrics(reg)
 	_ = newPhase2Metrics(reg)
+	_ = newPhase9Metrics(reg)
 
 	families, err := reg.PrometheusRegistry().Gather()
 	if err != nil {
@@ -25,10 +26,19 @@ func TestByteMetricFamiliesMaterializeBoundedLabelsAtStartup(t *testing.T) {
 	}
 
 	want := map[string]int{
-		"gantry_origin_bytes_total":        3,
-		"gantry_peer_fetch_bytes_total":    3,
-		"gantry_peer_serve_bytes_total":    3,
-		"gantry_mirror_bytes_served_total": 9,
+		"gantry_origin_bytes_total":                                    3,
+		"gantry_peer_fetch_bytes_total":                                3,
+		"gantry_peer_serve_bytes_total":                                3,
+		"gantry_mirror_bytes_served_total":                             9,
+		"gantry_mirror_response_completed_timestamp_seconds":           9,
+		"p2p_peer_fetch_total":                                         10,
+		"gantry_peer_fetch_last_timestamp_seconds":                     2,
+		"p2p_peer_fetch_duration_seconds":                              10,
+		"p2p_dht_lookup_total":                                         4,
+		"p2p_dht_lookup_duration_seconds":                              4,
+		"gantry_containerd_commit_observed_timestamp_seconds":          1,
+		"gantry_containerd_commit_observation_duration_seconds":        1,
+		"gantry_containerd_commit_latest_observation_duration_seconds": 1,
 	}
 
 	for name, wantSeries := range want {