db: less logging when opening a database connection

.drone.yml

@@ -21,7 +21,7 @@ steps:
         memory: 100MiB
 
   - name: test
-    image: golang:1.22.5
+    image: golang:1.23.4
     volumes:
       - name: go
         path: /go
@@ -32,7 +32,7 @@ steps:
       - go build ./...
 
   - name: goreleaser
-    image: golang:1.22.5
+    image: golang:1.23.4
     resources:
       requests:
         cpu: 6000
@@ -81,6 +81,6 @@ volumes:
 
 ---
 kind: signature
-hmac: 3a78faaef1946c3f5e154de10f4d7424a8b29655a156b10860433e073ac222a6
+hmac: f9c2145e25810c18afed02f1092a1910894c6924873f9d1d7fdc492ebe6e8555
 
 ...

.goreleaser.yml

@@ -1,3 +1,5 @@
+version: 2
+
 before:
   # we don't want this in the CI environment
   #hooks:

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.19.1
+FROM alpine:3.21.0
 
 RUN apk --no-cache upgrade
 RUN apk --no-cache add ca-certificates tzdata zsh jq tmux curl

chdb/db.go

@@ -38,10 +38,9 @@ func New(ctx context.Context, dbConfigPath string) (*ClickHouse, error) {
 }
 
 func setupClickhouse(ctx context.Context, configFile string) (*ClickHouse, error) {
-
 	log := logger.FromContext(ctx)
 
-	log.InfoContext(ctx, "opening config", "file", configFile)
+	log.DebugContext(ctx, "opening ch config", "file", configFile)
 
 	dbFile, err := os.Open(configFile)
 	if err != nil {
@@ -76,6 +75,7 @@ func open(ctx context.Context, cfg DBConfig) (clickhouse.Conn, error) {
 
 	conn, err := clickhouse.Open(&clickhouse.Options{
 		Addr:     []string{cfg.Host + ":9000"},
+		Protocol: clickhouse.Native,
 		Auth: clickhouse.Auth{
 			Database: cfg.Database,
 			Username: "default",
@@ -93,9 +93,9 @@ func open(ctx context.Context, cfg DBConfig) (clickhouse.Conn, error) {
 			Method: clickhouse.CompressionLZ4,
 		},
 		DialTimeout:          time.Second * 5,
-		MaxOpenConns:         5,
+		MaxOpenConns:         8,
-		MaxIdleConns:         5,
+		MaxIdleConns:         3,
-		ConnMaxLifetime:      time.Duration(10) * time.Minute,
+		ConnMaxLifetime:      5 * time.Minute,
 		ConnOpenStrategy:     clickhouse.ConnOpenInOrder,
 		BlockBufferSize:      10,
 		MaxCompressionBuffer: 10240,

chdb/logscores.go

@@ -19,7 +19,6 @@ func (d *ClickHouse) Logscores(ctx context.Context, serverID, monitorID int, sin
 	recentFirst := true
 
 	if since.IsZero() && !fullHistory {
-		log.WarnContext(ctx, "resetting since to 4 days ago")
 		since = time.Now().Add(4 * -24 * time.Hour)
 	} else {
 		recentFirst = false

go.mod

@@ -1,33 +1,35 @@
 module go.ntppool.org/data-api
 
-go 1.22.5
+go 1.23
+
+toolchain go1.23.4
 
 // replace github.com/samber/slog-echo => github.com/abh/slog-echo v0.0.0-20231024051244-af740639893e
 
 require (
-	github.com/ClickHouse/clickhouse-go/v2 v2.26.0
+	github.com/ClickHouse/clickhouse-go/v2 v2.30.0
 	github.com/go-sql-driver/mysql v1.8.1
 	github.com/hashicorp/go-retryablehttp v0.7.7
-	github.com/labstack/echo-contrib v0.17.1
+	github.com/labstack/echo-contrib v0.17.2
-	github.com/labstack/echo/v4 v4.12.0
+	github.com/labstack/echo/v4 v4.13.3
-	github.com/samber/slog-echo v1.14.4
+	github.com/samber/slog-echo v1.15.0
 	github.com/spf13/cobra v1.8.1
-	github.com/stretchr/testify v1.9.0
+	github.com/stretchr/testify v1.10.0
-	go.ntppool.org/api v0.3.3
+	go.ntppool.org/api v0.3.4
-	go.ntppool.org/common v0.2.11
+	go.ntppool.org/common v0.3.2-0.20250103130152-f6d160a7f8f4
-	go.opentelemetry.io/contrib/instrumentation/github.com/labstack/echo/otelecho v0.53.0
+	go.opentelemetry.io/contrib/instrumentation/github.com/labstack/echo/otelecho v0.58.0
-	go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace v0.53.0
+	go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace v0.58.0
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.53.0
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.58.0
-	go.opentelemetry.io/otel v1.28.0
+	go.opentelemetry.io/otel v1.33.0
-	go.opentelemetry.io/otel/trace v1.28.0
+	go.opentelemetry.io/otel/trace v1.33.0
-	golang.org/x/sync v0.7.0
+	golang.org/x/sync v0.10.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
 	filippo.io/edwards25519 v1.1.0 // indirect
-	github.com/ClickHouse/ch-go v0.62.0 // indirect
+	github.com/ClickHouse/ch-go v0.63.1 // indirect
-	github.com/andybalholm/brotli v1.1.0 // indirect
+	github.com/andybalholm/brotli v1.1.1 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
@@ -37,45 +39,61 @@ require (
 	github.com/go-faster/errors v0.7.1 // indirect
 	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/golang-jwt/jwt v3.2.2+incompatible // indirect
 	github.com/google/uuid v1.6.0 // indirect
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.25.1 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/klauspost/compress v1.17.11 // indirect
 	github.com/labstack/gommon v0.4.2 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/paulmach/orb v0.11.1 // indirect
-	github.com/pierrec/lz4/v4 v4.1.21 // indirect
+	github.com/pierrec/lz4/v4 v4.1.22 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/prometheus/client_golang v1.19.1 // indirect
+	github.com/prometheus/client_golang v1.20.5 // indirect
 	github.com/prometheus/client_model v0.6.1 // indirect
-	github.com/prometheus/common v0.55.0 // indirect
+	github.com/prometheus/common v0.61.0 // indirect
 	github.com/prometheus/procfs v0.15.1 // indirect
 	github.com/remychantenay/slog-otel v1.3.2 // indirect
-	github.com/samber/lo v1.46.0 // indirect
+	github.com/samber/lo v1.47.0 // indirect
+	github.com/samber/slog-multi v1.3.3 // indirect
 	github.com/segmentio/asm v1.2.0 // indirect
 	github.com/shopspring/decimal v1.4.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasttemplate v1.2.2 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.28.0 // indirect
+	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.28.0 // indirect
+	go.opentelemetry.io/contrib/bridges/otelslog v0.8.0 // indirect
-	go.opentelemetry.io/otel/metric v1.28.0 // indirect
+	go.opentelemetry.io/contrib/bridges/prometheus v0.58.0 // indirect
-	go.opentelemetry.io/otel/sdk v1.28.0 // indirect
+	go.opentelemetry.io/contrib/exporters/autoexport v0.58.0 // indirect
-	go.opentelemetry.io/proto/otlp v1.3.1 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.9.0 // indirect
-	golang.org/x/crypto v0.25.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.9.0 // indirect
-	golang.org/x/mod v0.19.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.33.0 // indirect
-	golang.org/x/net v0.27.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.33.0 // indirect
-	golang.org/x/sys v0.22.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.33.0 // indirect
-	golang.org/x/text v0.16.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.33.0 // indirect
-	golang.org/x/time v0.5.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.33.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20240711142825-46eb208f015d // indirect
+	go.opentelemetry.io/otel/exporters/prometheus v0.55.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240711142825-46eb208f015d // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdoutlog v0.9.0 // indirect
-	google.golang.org/grpc v1.65.0 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.33.0 // indirect
-	google.golang.org/protobuf v1.34.2 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.33.0 // indirect
+	go.opentelemetry.io/otel/log v0.9.0 // indirect
+	go.opentelemetry.io/otel/metric v1.33.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.33.0 // indirect
+	go.opentelemetry.io/otel/sdk/log v0.9.0 // indirect
+	go.opentelemetry.io/otel/sdk/metric v1.33.0 // indirect
+	go.opentelemetry.io/proto/otlp v1.4.0 // indirect
+	golang.org/x/crypto v0.31.0 // indirect
+	golang.org/x/mod v0.22.0 // indirect
+	golang.org/x/net v0.33.0 // indirect
+	golang.org/x/sys v0.29.0 // indirect
+	golang.org/x/text v0.21.0 // indirect
+	golang.org/x/time v0.9.0 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20250102185135-69823020774d // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250102185135-69823020774d // indirect
+	google.golang.org/grpc v1.69.2 // indirect
+	google.golang.org/protobuf v1.36.1 // indirect
 )

go.sum

@@ -1,12 +1,11 @@
 filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
-github.com/ClickHouse/ch-go v0.62.0 h1:eXH0hytXeCEEZHgMvOX9IiW7wqBb4w1MJMp9rArbkrc=
+github.com/ClickHouse/ch-go v0.63.1 h1:s2JyZvWLTCSAGdtjMBBmAgQQHMco6pawLJMOXi0FODM=
-github.com/ClickHouse/ch-go v0.62.0/go.mod h1:uzso52/PD9+gZj7tL6XAo8/EYDrx7CIwNF4c6PnO6S0=
+github.com/ClickHouse/ch-go v0.63.1/go.mod h1:I1kJJCL3WJcBMGe1m+HVK0+nREaG+JOYYBWjrDrF3R0=
-github.com/ClickHouse/clickhouse-go v1.5.4 h1:cKjXeYLNWVJIx2J1K6H2CqyRmfwVJVY1OV1coaaFcI0=
+github.com/ClickHouse/clickhouse-go/v2 v2.30.0 h1:AG4D/hW39qa58+JHQIFOSnxyL46H6h2lrmGGk17dhFo=
-github.com/ClickHouse/clickhouse-go/v2 v2.26.0 h1:j4/y6NYaCcFkJwN/TU700ebW+nmsIy34RmUAAcZKy9w=
+github.com/ClickHouse/clickhouse-go/v2 v2.30.0/go.mod h1:i9ZQAojcayW3RsdCb3YR+n+wC2h65eJsZCscZ1Z1wyo=
-github.com/ClickHouse/clickhouse-go/v2 v2.26.0/go.mod h1:iDTViXk2Fgvf1jn2dbJd1ys+fBkdD1UMRnXlwmhijhQ=
+github.com/andybalholm/brotli v1.1.1 h1:PR2pgnyFznKEugtsUo0xLdDop5SKXd5Qf5ysW+7XdTA=
-github.com/andybalholm/brotli v1.1.0 h1:eLKJA0d02Lf0mVpIDgYnqXcUn0GqVmEFny3VuID1U3M=
+github.com/andybalholm/brotli v1.1.1/go.mod h1:05ib4cKhjx3OQYUY22hTVd34Bc8upXjOLL2rKwwZBoA=
-github.com/andybalholm/brotli v1.1.0/go.mod h1:sms7XGricyQI9K10gOSf56VKKWS4oLer58Q+mhRPtnY=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
@@ -33,9 +32,9 @@ github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre
 github.com/go-sql-driver/mysql v1.8.1 h1:LedoTUt/eveggdHS9qUFC1EFSa8bU2+1pZjSRpvNJ1Y=
 github.com/go-sql-driver/mysql v1.8.1/go.mod h1:wEBSXgmK//2ZFJyE+qWnIsVGmvmEKlqwuVSjsCm7DZg=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
-github.com/golang-jwt/jwt v3.2.2+incompatible h1:IfV12K8xAKAnZqdXVzCZ+TOjboZ2keLg81eXfW3O+oY=
-github.com/golang-jwt/jwt v3.2.2+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
+github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
@@ -43,8 +42,8 @@ github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0 h1:bkypFPDjIYGfCYD5mRBvpqxfYX1YCS1PXdKYWi8FsN0=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.25.1 h1:VNqngBF40hVlDloBruUehVYC3ArSgIyScOAyMRqBxRg=
-github.com/grpc-ecosystem/grpc-gateway/v2 v2.20.0/go.mod h1:P+Lt/0by1T8bfcF3z737NnSbmxQAppXMRziHUxPOC8k=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.25.1/go.mod h1:RBRO7fro65R6tjKzYgLAFo0t1QEXY1Dp+i/bvpRiqiQ=
 github.com/hashicorp/go-cleanhttp v0.5.2 h1:035FKYIWjmULyFRBKPs8TBQoi0x6d9G4xc9neXJWAZQ=
 github.com/hashicorp/go-cleanhttp v0.5.2/go.mod h1:kO/YDlP8L1346E6Sodw+PrpBSV4/SoxCXGY6BqNFT48=
 github.com/hashicorp/go-hclog v1.6.3 h1:Qr2kF+eVWjTiYmU7Y31tYlP1h0q/X3Nl3tPGdaB11/k=
@@ -56,8 +55,8 @@ github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLf
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/compress v1.13.6/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47etQ6QUkpK6sk=
-github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
+github.com/klauspost/compress v1.17.11 h1:In6xLpyWOi1+C7tXUUWv2ot1QvBjxevKAaI6IXrJmUc=
-github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
+github.com/klauspost/compress v1.17.11/go.mod h1:pMDklpSncoRMuLFrf1W9Ss9KT+0rH90U12bZKk7uwG0=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
@@ -65,10 +64,12 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/labstack/echo-contrib v0.17.1 h1:7I/he7ylVKsDUieaGRZ9XxxTYOjfQwVzHzUYrNykfCU=
+github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
-github.com/labstack/echo-contrib v0.17.1/go.mod h1:SnsCZtwHBAZm5uBSAtQtXQHI3wqEA73hvTn0bYMKnZA=
+github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
-github.com/labstack/echo/v4 v4.12.0 h1:IKpw49IMryVB2p1a4dzwlhP1O2Tf2E0Ir/450lH+kI0=
+github.com/labstack/echo-contrib v0.17.2 h1:K1zivqmtcC70X9VdBFdLomjPDEVHlrcAObqmuFj1c6w=
-github.com/labstack/echo/v4 v4.12.0/go.mod h1:UP9Cr2DJXbOK3Kr9ONYzNowSh7HP0aG0ShAyycHSJvM=
+github.com/labstack/echo-contrib v0.17.2/go.mod h1:NeDh3PX7j/u+jR4iuDt1zHmWZSCz9c/p9mxXcDpyS8E=
+github.com/labstack/echo/v4 v4.13.3 h1:pwhpCPrTl5qry5HRdM5FwdXnhXSLSY+WE+YQSeCaafY=
+github.com/labstack/echo/v4 v4.13.3/go.mod h1:o90YNEeQWjDozo584l7AwhJMHN0bOC4tAfg+Xox9q5g=
 github.com/labstack/gommon v0.4.2 h1:F8qTUNXgG1+6WQmqoUWnz8WiEU60mXVVw0P4ht1WRA0=
 github.com/labstack/gommon v0.4.2/go.mod h1:QlUFxVM+SNXhDL/Z7YhocGIBYOiwB0mXm1+1bAPHPyU=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
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+go.opentelemetry.io/otel/exporters/prometheus v0.55.0/go.mod h1:nC00vyCmQixoeaxF6KNyP42II/RHa9UdruK02qBmHvI=
+go.opentelemetry.io/otel/exporters/stdout/stdoutlog v0.9.0 h1:iI15wfQb5ZtAVTdS5WROxpYmw6Kjez3hT9SuzXhrgGQ=
+go.opentelemetry.io/otel/exporters/stdout/stdoutlog v0.9.0/go.mod h1:yepwlNzVVxHWR5ugHIrll+euPQPq4pvysHTDr/daV9o=
+go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.33.0 h1:FiOTYABOX4tdzi8A0+mtzcsTmi6WBOxk66u0f1Mj9Gs=
+go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.33.0/go.mod h1:xyo5rS8DgzV0Jtsht+LCEMwyiDbjpsxBpWETwFRF0/4=
+go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.33.0 h1:W5AWUn/IVe8RFb5pZx1Uh9Laf/4+Qmm4kJL5zPuvR+0=
+go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.33.0/go.mod h1:mzKxJywMNBdEX8TSJais3NnsVZUaJ+bAy6UxPTng2vk=
+go.opentelemetry.io/otel/log v0.9.0 h1:0OiWRefqJ2QszpCiqwGO0u9ajMPe17q6IscQvvp3czY=
+go.opentelemetry.io/otel/log v0.9.0/go.mod h1:WPP4OJ+RBkQ416jrFCQFuFKtXKD6mOoYCQm6ykK8VaU=
+go.opentelemetry.io/otel/metric v1.33.0 h1:r+JOocAyeRVXD8lZpjdQjzMadVZp2M4WmQ+5WtEnklQ=
+go.opentelemetry.io/otel/metric v1.33.0/go.mod h1:L9+Fyctbp6HFTddIxClbQkjtubW6O9QS3Ann/M82u6M=
+go.opentelemetry.io/otel/sdk v1.33.0 h1:iax7M131HuAm9QkZotNHEfstof92xM+N8sr3uHXc2IM=
+go.opentelemetry.io/otel/sdk v1.33.0/go.mod h1:A1Q5oi7/9XaMlIWzPSxLRWOI8nG3FnzHJNbiENQuihM=
+go.opentelemetry.io/otel/sdk/log v0.9.0 h1:YPCi6W1Eg0vwT/XJWsv2/PaQ2nyAJYuF7UUjQSBe3bc=
+go.opentelemetry.io/otel/sdk/log v0.9.0/go.mod h1:y0HdrOz7OkXQBuc2yjiqnEHc+CRKeVhRE3hx4RwTmV4=
+go.opentelemetry.io/otel/sdk/metric v1.33.0 h1:Gs5VK9/WUJhNXZgn8MR6ITatvAmKeIuCtNbsP3JkNqU=
+go.opentelemetry.io/otel/sdk/metric v1.33.0/go.mod h1:dL5ykHZmm1B1nVRk9dDjChwDmt81MjVp3gLkQRwKf/Q=
+go.opentelemetry.io/otel/trace v1.33.0 h1:cCJuF7LRjUFso9LPnEAHJDB2pqzp+hbO8eu1qqW2d/s=
+go.opentelemetry.io/otel/trace v1.33.0/go.mod h1:uIcdVUZMpTAmz0tI1z04GoVSezK37CbGV4fr1f2nBck=
+go.opentelemetry.io/proto/otlp v1.4.0 h1:TA9WRvW6zMwP+Ssb6fLoUIuirti1gGbP28GcKG1jgeg=
+go.opentelemetry.io/proto/otlp v1.4.0/go.mod h1:PPBWZIP98o2ElSqI35IHfu7hIhSwvc5N38Jw8pXuGFY=
+go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
+go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
-golang.org/x/crypto v0.25.0 h1:ypSNr+bnYL2YhwoMt2zPxHFmbAN1KZs/njMG3hxUp30=
+golang.org/x/crypto v0.31.0 h1:ihbySMvVjLAeSH1IbfcRTkD/iNscyz8rGzjF/E5hV6U=
-golang.org/x/crypto v0.25.0/go.mod h1:T+wALwcMOSE0kXgUAnPAHqTLW+XHgcELELW8VaDgm/M=
+golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.19.0 h1:fEdghXQSo20giMthA7cd28ZC+jts4amQ3YMXiP5oMQ8=
+golang.org/x/mod v0.22.0 h1:D4nJWe9zXqHOmWqj4VMOJhvzj7bEZg4wEYa759z1pH4=
-golang.org/x/mod v0.19.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/mod v0.22.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.27.0 h1:5K3Njcw06/l2y9vpGCSdcxWOYHOUk3dVNGDXN+FvAys=
+golang.org/x/net v0.33.0 h1:74SYHlV8BIgHIFC/LrYkOGIwL19eTYXQ5wc6TBuO36I=
-golang.org/x/net v0.27.0/go.mod h1:dDi0PyhWNoiUOrAS8uXv/vnScO4wnHQO4mj9fn/RytE=
+golang.org/x/net v0.33.0/go.mod h1:HXLR5J+9DxmrqMwG9qjGCxZ+zKXxBru04zlTvWlWuN4=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
+golang.org/x/sync v0.10.0 h1:3NQrjDixjgGwUOCaF8w2+VYHv0Ve/vGYSbdkTa98gmQ=
-golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -190,17 +227,17 @@ golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
+golang.org/x/sys v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=
-golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
-golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
-golang.org/x/time v0.5.0 h1:o7cqy6amK/52YcAKIPlM3a+Fpj35zvRj2TP+e1xFSfk=
+golang.org/x/time v0.9.0 h1:EsRrnYcQiGH+5FfbgvV4AP7qEZstoyrHB0DzarOQ4ZY=
-golang.org/x/time v0.5.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
+golang.org/x/time v0.9.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
@@ -209,16 +246,16 @@ golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/genproto/googleapis/api v0.0.0-20240711142825-46eb208f015d h1:kHjw/5UfflP/L5EbledDrcG4C2597RtymmGRZvHiCuY=
+google.golang.org/genproto/googleapis/api v0.0.0-20250102185135-69823020774d h1:H8tOf8XM88HvKqLTxe755haY6r1fqqzLbEnfrmLXlSA=
-google.golang.org/genproto/googleapis/api v0.0.0-20240711142825-46eb208f015d/go.mod h1:mw8MG/Qz5wfgYr6VqVCiZcHe/GJEfI+oGGDCohaVgB0=
+google.golang.org/genproto/googleapis/api v0.0.0-20250102185135-69823020774d/go.mod h1:2v7Z7gP2ZUOGsaFyxATQSRoBnKygqVq2Cwnvom7QiqY=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240711142825-46eb208f015d h1:JU0iKnSg02Gmb5ZdV8nYsKEKsP6o/FGVWTrw4i1DA9A=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250102185135-69823020774d h1:xJJRGY7TJcvIlpSrN3K6LAWgNFUILlO+OMAqtg9aqnw=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240711142825-46eb208f015d/go.mod h1:Ue6ibwXGpU+dqIcODieyLOcgj7z8+IcskoNIgZxtrFY=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250102185135-69823020774d/go.mod h1:3ENsm/5D1mzDyhpzeRi1NR784I0BcofWBoSc5QqqMK4=
-google.golang.org/grpc v1.65.0 h1:bs/cUb4lp1G5iImFFd3u5ixQzweKizoZJAwBNLR42lc=
+google.golang.org/grpc v1.69.2 h1:U3S9QEtbXC0bYNvRtcoklF3xGtLViumSYxWykJS+7AU=
-google.golang.org/grpc v1.65.0/go.mod h1:WgYC2ypjlB0EiQi6wdKixMqukr6lBc0Vo+oOgjrM5ZQ=
+google.golang.org/grpc v1.69.2/go.mod h1:vyjdE6jLBI76dgpDojsFGNaHlxdjXN9ghpnd2o7JGZ4=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
+google.golang.org/protobuf v1.36.1 h1:yBPeRvTftaleIgM3PZ/WBIZ7XM/eEYAaEyCwvyjq/gk=
-google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
+google.golang.org/protobuf v1.36.1/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=

ntpdb/dbconn.go

@@ -1,14 +1,15 @@
 package ntpdb
 
 import (
+	"context"
 	"database/sql"
 	"database/sql/driver"
 	"fmt"
-	"log"
 	"os"
 	"time"
 
 	"github.com/go-sql-driver/mysql"
+	"go.ntppool.org/common/logger"
 	"gopkg.in/yaml.v3"
 )
 
@@ -22,27 +23,28 @@ type DBConfig struct {
 	Pass string `default:"" flag:"pass"`
 }
 
-func OpenDB(configFile string) (*sql.DB, error) {
+func OpenDB(ctx context.Context, configFile string) (*sql.DB, error) {
+	log := logger.FromContext(ctx)
 
-	dbconn := sql.OpenDB(Driver{CreateConnectorFunc: createConnector(configFile)})
+	dbconn := sql.OpenDB(Driver{CreateConnectorFunc: createConnector(ctx, configFile)})
 
 	dbconn.SetConnMaxLifetime(time.Minute * 3)
-	dbconn.SetMaxOpenConns(10)
+	dbconn.SetMaxOpenConns(8)
-	dbconn.SetMaxIdleConns(5)
+	dbconn.SetMaxIdleConns(3)
 
 	err := dbconn.Ping()
 	if err != nil {
-		log.Printf("Could not connect to database: %s", err)
+		log.DebugContext(ctx, "could not connect to database: %s", "err", err)
 		return nil, err
 	}
 
 	return dbconn, nil
 }
 
-func createConnector(configFile string) CreateConnectorFunc {
+func createConnector(ctx context.Context, configFile string) CreateConnectorFunc {
+	log := logger.FromContext(ctx)
 	return func() (driver.Connector, error) {
-
+		log.DebugContext(ctx, "opening db config file", "filename", configFile)
-		log.Printf("opening config file %s", configFile)
 
 		dbFile, err := os.Open(configFile)
 		if err != nil {
@@ -70,11 +72,11 @@ func createConnector(configFile string) CreateConnectorFunc {
 			return nil, err
 		}
 
-		if user := cfg.MySQL.User; len(user) > 0 && err == nil {
+		if user := cfg.MySQL.User; len(user) > 0 {
 			dbcfg.User = user
 		}
 
-		if pass := cfg.MySQL.Pass; len(pass) > 0 && err == nil {
+		if pass := cfg.MySQL.Pass; len(pass) > 0 {
 			dbcfg.Passwd = pass
 		}
 

scripts/run-goreleaser

@@ -2,7 +2,7 @@
 
 set -euo pipefail
 
-go install github.com/goreleaser/goreleaser@v1.26.2
+go install github.com/goreleaser/goreleaser/v2@v2.5.0
 
 if [ ! -z "${harbor_username:-}" ]; then
   DOCKER_FILE=~/.docker/config.json

server/graph_image.go

@@ -107,6 +107,7 @@ func (srv *Server) fetchGraph(ctx context.Context, serverIP string) (string, []b
 
 	client := retryablehttp.NewClient()
 	client.Logger = log
+
 	client.HTTPClient.Transport = otelhttp.NewTransport(
 		client.HTTPClient.Transport,
 		otelhttp.WithClientTrace(func(ctx context.Context) *httptrace.ClientTrace {

server/history.go

@@ -73,7 +73,7 @@ func (srv *Server) getHistoryParameters(ctx context.Context, c echo.Context) (hi
 
 	monitorParam := c.QueryParam("monitor")
 
-	var monitorID uint32 = 0
+	var monitorID uint32
 	switch monitorParam {
 	case "":
 		name := "recentmedian.scores.ntp.dev"
@@ -145,7 +145,8 @@ func (srv *Server) history(c echo.Context) error {
 	ctx, span := tracing.Tracer().Start(c.Request().Context(), "history")
 	defer span.End()
 
-	// just cache for a short time by default
+	// set a reasonable default cache time; adjusted later for
+	// happy path common responses
 	c.Response().Header().Set("Cache-Control", "public,max-age=240")
 
 	mode := paramHistoryMode(c.Param("mode"))
@@ -223,7 +224,6 @@ func (srv *Server) history(c echo.Context) error {
 	default:
 		return c.String(http.StatusNotFound, "not implemented")
 	}
-
 }
 
 func (srv *Server) historyJSON(ctx context.Context, c echo.Context, server ntpdb.Server, history *logscores.LogScoreHistory) error {
@@ -317,21 +317,16 @@ func (srv *Server) historyJSON(ctx context.Context, c echo.Context, server ntpdb
 		}
 	}
 
-	if len(history.LogScores) == 0 ||
+	setHistoryCacheControl(c, history)
-		history.LogScores[len(history.LogScores)-1].Ts.After(time.Now().Add(-8*time.Hour)) {
-		// cache for longer if data hasn't updated for a while
-		c.Request().Header.Set("Cache-Control", "s-maxage=3600,max-age=1800")
-	} else {
-		c.Request().Header.Set("Cache-Control", "s-maxage=300,max-age=240")
-	}
 
 	return c.JSON(http.StatusOK, res)
-
 }
 
 func (srv *Server) historyCSV(ctx context.Context, c echo.Context, history *logscores.LogScoreHistory) error {
 	log := logger.Setup()
 	ctx, span := tracing.Tracer().Start(ctx, "history.csv")
+	defer span.End()
+
 	b := bytes.NewBuffer([]byte{})
 	w := csv.NewWriter(b)
 
@@ -342,7 +337,11 @@ func (srv *Server) historyCSV(ctx context.Context, c echo.Context, history *logs
 		return s
 	}
 
-	w.Write([]string{"ts_epoch", "ts", "offset", "step", "score", "monitor_id", "monitor_name", "leap", "error"})
+	err := w.Write([]string{"ts_epoch", "ts", "offset", "step", "score", "monitor_id", "monitor_name", "leap", "error"})
+	if err != nil {
+		log.ErrorContext(ctx, "could not write csv header", "err", err)
+		return err
+	}
 	for _, l := range history.LogScores {
 		// log.Debug("csv line", "id", l.ID, "n", i)
 
@@ -381,16 +380,31 @@ func (srv *Server) historyCSV(ctx context.Context, c echo.Context, history *logs
 	w.Flush()
 	if err := w.Error(); err != nil {
 		log.ErrorContext(ctx, "could not flush csv", "err", err)
-		span.End()
 		return c.String(http.StatusInternalServerError, "csv error")
 	}
 
 	// log.Info("entries", "count", len(history.LogScores), "out_bytes", b.Len())
 
-	c.Response().Header().Set("Cache-Control", "s-maxage=150,max-age=120")
+	setHistoryCacheControl(c, history)
+
 	c.Response().Header().Set("Content-Disposition", "inline")
 	// Chrome and Firefox force-download text/csv files, so use text/plain
 	// https://bugs.chromium.org/p/chromium/issues/detail?id=152911
 	return c.Blob(http.StatusOK, "text/plain", b.Bytes())
-
+}
+
+func setHistoryCacheControl(c echo.Context, history *logscores.LogScoreHistory) {
+	hdr := c.Response().Header()
+	if len(history.LogScores) == 0 ||
+		// cache for longer if data hasn't updated for a while; or we didn't
+		// find any.
+		(time.Now().Add(-8 * time.Hour).After(history.LogScores[len(history.LogScores)-1].Ts)) {
+		hdr.Set("Cache-Control", "s-maxage=3600,max-age=1800")
+	} else {
+		if len(history.LogScores) == 1 {
+			hdr.Set("Cache-Control", "s-maxage=60,max-age=35")
+		} else {
+			hdr.Set("Cache-Control", "s-maxage=240,max-age=120")
+		}
+	}
 }

server/server.go

@@ -8,6 +8,8 @@ import (
 	"log/slog"
 	"net/http"
 	"os"
+	"strconv"
+	"time"
 
 	"golang.org/x/sync/errgroup"
 
@@ -51,7 +53,7 @@ func NewServer(ctx context.Context, configFile string) (*Server, error) {
 	if err != nil {
 		return nil, fmt.Errorf("clickhouse open: %w", err)
 	}
-	db, err := ntpdb.OpenDB(configFile)
+	db, err := ntpdb.OpenDB(ctx, configFile)
 	if err != nil {
 		return nil, fmt.Errorf("mysql open: %w", err)
 	}
@@ -74,7 +76,7 @@ func NewServer(ctx context.Context, configFile string) (*Server, error) {
 		Environment: conf.DeploymentMode(),
 	})
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("tracing init: %w", err)
 	}
 
 	srv.tpShutdown = append(srv.tpShutdown, tpShutdown)
@@ -97,7 +99,10 @@ func (srv *Server) Run() error {
 	})
 
 	g.Go(func() error {
-		return health.HealthCheckListener(ctx, 9019, log.WithGroup("health"))
+		hclog := log.WithGroup("health")
+		hc := health.NewServer(healthHandler(srv, hclog))
+		hc.SetLogger(hclog)
+		return hc.Listen(ctx, 9019)
 	})
 
 	e := echo.New()
@@ -269,5 +274,73 @@ func (srv *Server) userCountryData(c echo.Context) error {
 		UserCountry: data,
 		ZoneStats:   zoneStats,
 	})
-
+}
+
+func healthHandler(srv *Server, log *slog.Logger) func(w http.ResponseWriter, req *http.Request) {
+	return func(w http.ResponseWriter, req *http.Request) {
+		ctx := req.Context()
+		ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
+		defer cancel()
+		g, ctx := errgroup.WithContext(ctx)
+
+		stats := srv.db.Stats()
+		if stats.OpenConnections > 3 {
+			log.InfoContext(ctx, "health requests", "url", req.URL.String(), "stats", stats)
+		}
+
+		if resetParam := req.URL.Query().Get("reset"); resetParam != "" {
+			reset, err := strconv.ParseBool(resetParam)
+			log.InfoContext(ctx, "db reset request", "err", err, "reset", reset)
+
+			if err == nil && reset {
+				// this feature was to debug some specific problem
+				log.InfoContext(ctx, "setting idle db conns to zero")
+				srv.db.SetConnMaxLifetime(30 * time.Second)
+				srv.db.SetMaxIdleConns(0)
+				srv.db.SetMaxIdleConns(4)
+			}
+		}
+
+		g.Go(func() error {
+			err := srv.ch.Scores.Ping(ctx)
+			if err != nil {
+				log.WarnContext(ctx, "ch scores ping", "err", err)
+				return err
+			}
+			return nil
+		})
+
+		g.Go(func() error {
+			err := srv.ch.Logs.Ping(ctx)
+			if err != nil {
+				log.WarnContext(ctx, "ch logs ping", "err", err)
+				return err
+			}
+			return nil
+		})
+
+		g.Go(func() error {
+			err := srv.db.PingContext(ctx)
+			if err != nil {
+				log.WarnContext(ctx, "db ping", "err", err)
+				return err
+			}
+			return nil
+		})
+
+		err := g.Wait()
+		if err != nil {
+			w.WriteHeader(http.StatusServiceUnavailable)
+			_, err = w.Write([]byte("db ping err"))
+			if err != nil {
+				log.ErrorContext(ctx, "could not write response", "err", err)
+			}
+			return
+		}
+		w.WriteHeader(http.StatusOK)
+		_, err = w.Write([]byte("ok"))
+		if err != nil {
+			log.ErrorContext(ctx, "could not write response", "err", err)
+		}
+	}
 }