feat: add system dashboard (Go monitoring app)
Migrated from a sepharyana-hub/infra/dashboard. - Docker container monitor via socket - Jaeger trace viewer + Prometheus metrics - SVG charts (donut, line, gauge) - Proxies to Jaeger/Prometheus APIs Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
asepharyana
co-authored by
Claude Opus 4.8
Claude Opus 4.8
parent
30bca07cdd
commit
91896b8fdf
@@ -0,0 +1,3 @@
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module github.com/asepharyana/asepharyana-hub-hub/dashboard
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go 1.24
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@@ -0,0 +1,706 @@
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package main
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import (
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_ "embed"
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"encoding/json"
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"fmt"
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"html/template"
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"io"
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"log"
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"math"
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"net"
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"net/http"
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"net/http/httputil"
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"net/url"
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"os"
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"sort"
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"strings"
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"sync"
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"time"
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)
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//go:embed template.html
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var templateHTML string
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var tmpl = template.Must(template.New("dashboard").Funcs(template.FuncMap{
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"sub": func(a, b int) int { return a - b },
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"safeDur": func(us int64) string {
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if us < 1000 {
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return fmt.Sprintf("%dµs", us)
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} else if us < 1_000_000 {
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return fmt.Sprintf("%.1fms", float64(us)/1000)
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}
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return fmt.Sprintf("%.2fs", float64(us)/1_000_000)
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},
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}).Parse(templateHTML))
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// ── Types ──
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type Service struct {
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Name string
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State string
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HasWeb bool // has traefik router label → eligible for quick link
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}
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type Trace struct {
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Service string
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Operation string
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Duration int64
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Spans int
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HasError bool
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}
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type NodeMetrics struct {
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CPU float64 // percent
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RAM float64 // percent
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Disk float64 // percent
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Load1 float64
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Load5 float64
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Load15 float64
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NetIn float64 // bytes/s
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NetOut float64 // bytes/s
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Online bool
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}
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type DashboardData struct {
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Services []Service
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Running int
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Degraded int
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TraceCount int
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RPS []float64
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Latency []float64
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Errors []float64
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TraceVolume []float64
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TraceList []Trace
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Labels []string
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Node NodeMetrics
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Links []Link
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HasOTelData bool
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HasNodeData bool
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HealthSVG template.HTML
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RPSSVG template.HTML
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LatencySVG template.HTML
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ErrorSVG template.HTML
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TraceSVG template.HTML
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CPUSVG template.HTML
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RAMSVG template.HTML
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DiskSVG template.HTML
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SystemName string
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TotalUp int
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TotalDown int
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}
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type Link struct {
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URL string
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Label string
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}
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// ── State ──
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type appState struct {
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mu sync.Mutex
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rps []float64
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latency []float64
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errs []float64
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traces []float64
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labels []string
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services []Service
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tracesL []Trace
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node NodeMetrics
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}
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var state appState
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const maxPts = 30
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// ── HTTP clients ──
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var dockerClient = &http.Client{
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Transport: &http.Transport{
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Dial: func(_, _ string) (net.Conn, error) {
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return net.DialTimeout("unix", "/var/run/docker.sock", 5*time.Second)
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},
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},
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Timeout: 10 * time.Second,
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}
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var httpClient = &http.Client{Timeout: 10 * time.Second}
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var composeProject string // auto-detected from Docker labels
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func fetchJSON(url string, v interface{}) error {
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r, err := httpClient.Get(url)
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if err != nil {
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return err
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}
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defer r.Body.Close()
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return json.NewDecoder(r.Body).Decode(v)
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}
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// ── Docker service discovery ──
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func fetchServices() []Service {
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r, err := dockerClient.Get("http://localhost/containers/json?all=true")
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if err != nil {
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return nil
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}
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defer r.Body.Close()
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var raw []struct {
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Names []string `json:"Names"`
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State string `json:"State"`
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Labels map[string]string `json:"Labels"`
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NetworkSettings *struct {
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Networks map[string]any `json:"Networks"`
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} `json:"NetworkSettings"`
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}
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if json.NewDecoder(r.Body).Decode(&raw) != nil {
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return nil
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}
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// auto-detect compose project name from first compose-managed container
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if composeProject == "" {
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for _, c := range raw {
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if p, ok := c.Labels["com.docker.compose.project"]; ok && p != "" {
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composeProject = p
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break
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}
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}
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}
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var svcs []Service
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for _, c := range raw {
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if c.NetworkSettings != nil {
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if _, ok := c.NetworkSettings.Networks["app-shared-net"]; ok {
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// only include containers from our compose project
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if c.Labels["com.docker.compose.project"] == composeProject {
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name := strings.TrimPrefix(c.Names[0], "/")
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// auto-detect web services by traefik label
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hasWeb := false
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for k := range c.Labels {
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if strings.HasPrefix(k, "traefik.http.routers.") && strings.HasSuffix(k, ".rule") {
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hasWeb = true
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break
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}
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}
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// also flag containers that look like web services (named with trailing numbers or common patterns)
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// but don't hardcode names — trust only labels
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svcs = append(svcs, Service{Name: name, State: c.State, HasWeb: hasWeb})
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}
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}
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}
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}
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return svcs
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}
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// ── Jaeger ──
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func jaegerServices() []string {
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var d struct{ Data []string }
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if fetchJSON("http://jaeger:16686/api/services", &d) != nil {
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return nil
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}
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return d.Data
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}
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func jaegerTraces(service string) []Trace {
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now := time.Now().UnixMicro()
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start := now - 5*60*1_000_000
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u := fmt.Sprintf("http://jaeger:16686/api/traces?service=%s&start=%d&end=%d&limit=5&lookback=5m",
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url.QueryEscape(service), start, now)
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var d struct {
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Data []struct {
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Duration int64 `json:"duration"`
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Spans []struct {
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OperationName string `json:"operationName"`
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ProcessID string `json:"processID"`
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Tags []struct {
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Key string `json:"key"`
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Value any `json:"value"`
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} `json:"tags"`
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} `json:"spans"`
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Processes map[string]struct {
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ServiceName string `json:"serviceName"`
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} `json:"processes"`
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} `json:"data"`
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}
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if fetchJSON(u, &d) != nil {
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return nil
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}
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var tt []Trace
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for _, t := range d.Data {
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if len(t.Spans) == 0 {
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continue
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}
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s := t.Spans[0]
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svc := "unknown"
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if p, ok := t.Processes[s.ProcessID]; ok {
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svc = p.ServiceName
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}
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hasErr := false
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for _, sp := range t.Spans {
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for _, tag := range sp.Tags {
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if tag.Key == "error" && tag.Value == true {
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hasErr = true
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}
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}
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}
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tt = append(tt, Trace{Service: svc, Operation: s.OperationName, Duration: t.Duration, Spans: len(t.Spans), HasError: hasErr})
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}
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return tt
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}
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// ── Prometheus helpers ──
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// promInstant returns a single float64 value from an instant query
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func promInstant(query string) (float64, bool) {
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u := fmt.Sprintf("http://prometheus:9090/api/v1/query?query=%s",
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url.QueryEscape(query))
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var d struct {
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Data struct {
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Result []struct {
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Value []any `json:"value"`
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} `json:"result"`
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} `json:"data"`
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}
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if fetchJSON(u, &d) != nil || len(d.Data.Result) == 0 || len(d.Data.Result[0].Value) < 2 {
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return 0, false
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}
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var f float64
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fmt.Sscanf(fmt.Sprint(d.Data.Result[0].Value[1]), "%f", &f)
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return f, true
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}
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// promRange returns time-series values from a range query
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func promRange(query string) []float64 {
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now := time.Now().Unix()
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u := fmt.Sprintf("http://prometheus:9090/api/v1/query_range?query=%s&start=%d&end=%d&step=15",
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url.QueryEscape(query), now-300, now)
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var d struct {
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Data struct {
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Result []struct {
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Values [][]any `json:"values"`
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} `json:"result"`
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} `json:"data"`
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}
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if fetchJSON(u, &d) != nil || len(d.Data.Result) == 0 {
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return nil
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}
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var vals []float64
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for _, v := range d.Data.Result[0].Values {
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if len(v) == 2 {
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var f float64
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fmt.Sscanf(fmt.Sprint(v[1]), "%f", &f)
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vals = append(vals, f)
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}
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}
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return vals
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}
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// ── Node metrics ──
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func fetchNodeMetrics() NodeMetrics {
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n := NodeMetrics{}
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if v, ok := promInstant(`100 - (avg by(instance)(rate(node_cpu_seconds_total{mode="idle"}[1m])) * 100)`); ok {
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n.CPU = v
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}
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if v, ok := promInstant(`(1 - node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) * 100`); ok {
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n.RAM = v
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}
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if v, ok := promInstant(`(1 - node_filesystem_avail_bytes{mountpoint="/",fstype!="tmpfs"} / node_filesystem_size_bytes{mountpoint="/",fstype!="tmpfs"}) * 100`); ok {
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n.Disk = v
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}
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if v, ok := promInstant(`node_load1`); ok {
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n.Load1 = v
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}
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if v, ok := promInstant(`node_load5`); ok {
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n.Load5 = v
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}
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if v, ok := promInstant(`node_load15`); ok {
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n.Load15 = v
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}
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if vIn, okIn := promInstant(`rate(node_network_receive_bytes_total{device!="lo"}[1m])`); okIn {
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n.NetIn = vIn
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}
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if vOut, okOut := promInstant(`rate(node_network_transmit_bytes_total{device!="lo"}[1m])`); okOut {
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n.NetOut = vOut
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}
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// node is online if at least CPU or RAM returned data
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n.Online = n.CPU > 0 || n.RAM > 0
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return n
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}
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// ── SVG Charts ──
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func svgDonut(running, degraded int) string {
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total := running + degraded
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if total == 0 {
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return noDataSVG(200, 210)
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}
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const cx, cy, R = 100, 90, 60
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const circ = 2 * math.Pi * R
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type seg struct{ n int; c, l string }
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segs := []seg{{running, "#3fb950", "Running"}, {degraded, "#d29922", "Degraded"}}
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var b strings.Builder
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b.WriteString(`<svg width="200" height="210" viewBox="0 0 200 210" xmlns="http://www.w3.org/2000/svg">`)
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b.WriteString(`<style>.sl{font-family:system-ui,sans-serif;font-size:10px;fill:#8b949e}</style>`)
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var off float64
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for _, s := range segs {
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if s.n == 0 {
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continue
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}
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frac := float64(s.n) / float64(total)
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ln := frac * circ
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b.WriteString(fmt.Sprintf(`<circle cx="%d" cy="%d" r="%d" fill="none" stroke="%s" stroke-width="14" stroke-dasharray="%.1f %.1f" stroke-dashoffset="%.1f" transform="rotate(-90 %d %d)"/>`,
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cx, cy, R, s.c, ln, circ-ln, -off, cx, cy))
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off += ln
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}
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b.WriteString(fmt.Sprintf(`<text x="%d" y="%d" text-anchor="middle" fill="#e6edf3" font-size="26" font-weight="700" font-family="system-ui,sans-serif">%d</text>`, cx, cy-4, total))
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b.WriteString(fmt.Sprintf(`<text x="%d" y="%d" text-anchor="middle" class="sl">total</text>`, cx, cy+14))
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y := 165
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for _, s := range segs {
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if s.n == 0 {
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continue
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}
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fmt.Fprintf(&b, `<circle cx="16" cy="%d" r="4" fill="%s"/><text x="26" y="%d" class="sl">%s: %d</text>`, y, s.c, y+3, s.l, s.n)
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y += 16
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}
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b.WriteString(`</svg>`)
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return b.String()
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}
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func svgLine(data []float64, color string) string {
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w, h := 300.0, 160.0
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pl, pt, pr, pb := 45.0, 20.0, 10.0, 25.0
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vw := w - pl - pr
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vh := h - pt - pb
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if len(data) == 0 {
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return noDataSVG(int(w), int(h))
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}
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maxV := 0.0
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for _, v := range data {
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if v > maxV {
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maxV = v
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}
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}
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if maxV <= 0 {
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maxV = 1
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}
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var b strings.Builder
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fmt.Fprintf(&b, `<svg width="%.0f" height="%.0f" viewBox="0 0 %.0f %.0f" xmlns="http://www.w3.org/2000/svg">`, w, h, w, h)
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b.WriteString(`<style>.ax{font-family:system-ui,sans-serif;font-size:9px;fill:#6e7681}</style>`)
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for i := 0; i <= 4; i++ {
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y := pt + vh*float64(i)/4
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val := maxV * (1 - float64(i)/4)
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fmt.Fprintf(&b, `<line x1="%.0f" y1="%.0f" x2="%.0f" y2="%.0f" stroke="#21262d" stroke-width="1"/>`, pl, y, pl+vw, y)
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fmt.Fprintf(&b, `<text x="%.0f" y="%.0f" text-anchor="end" class="ax">%.0f</text>`, pl-6, y+3, val)
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}
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n := len(data)
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if n > 1 {
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pts := make([]string, n)
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for i, v := range data {
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x := pl + vw*float64(i)/float64(n-1)
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y := pt + vh*(1-v/maxV)
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pts[i] = fmt.Sprintf("%.1f,%.1f", x, y)
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}
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area := fmt.Sprintf("M%.1f,%.1f L%s L%.1f,%.1f Z", pl, pt+vh, strings.Join(pts, " L"), pl+vw, pt+vh)
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fmt.Fprintf(&b, `<path d="%s" fill="%s" opacity="0.15"/>`, area, color)
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fmt.Fprintf(&b, `<polyline points="%s" fill="none" stroke="%s" stroke-width="2" stroke-linejoin="round"/>`,
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strings.Join(pts, " "), color)
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lv := data[n-1]
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ly := pt + vh*(1-lv/maxV)
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fmt.Fprintf(&b, `<text x="%.0f" y="%.0f" text-anchor="end" fill="%s" font-size="11" font-weight="600" font-family="system-ui,sans-serif">%.1f</text>`,
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pl+vw, ly-10, color, lv)
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}
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step := n / 5
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if step < 1 {
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step = 1
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}
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for i := step; i < n; i += step {
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x := pl + vw*float64(i)/float64(n-1)
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fmt.Fprintf(&b, `<text x="%.0f" y="%.0f" text-anchor="middle" class="ax">%d</text>`, x, pt+vh+16, i+1)
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}
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b.WriteString(`</svg>`)
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return b.String()
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}
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func svgGauge(pct float64, color, label, unit string) string {
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if pct <= 0 {
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return noDataSVG(220, 100)
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}
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w, h := 220.0, 100.0
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bw, bh := 200.0, 14.0
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bx, by := (w-bw)/2, 30.0
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fw := bw * math.Min(pct/100, 1)
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var b strings.Builder
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fmt.Fprintf(&b, `<svg width="%.0f" height="%.0f" viewBox="0 0 %.0f %.0f" xmlns="http://www.w3.org/2000/svg">`, w, h, w, h)
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b.WriteString(`<style>.gt{font-family:system-ui,sans-serif;font-size:11px;fill:#8b949e;text-anchor:middle}</style>`)
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// background bar
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fmt.Fprintf(&b, `<rect x="%.0f" y="%.0f" width="%.0f" height="%.0f" rx="7" ry="7" fill="#1c2333"/>`, bx, by, bw, bh)
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// fill bar
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if fw > 0 {
|
||||
fmt.Fprintf(&b, `<rect x="%.0f" y="%.0f" width="%.0f" height="%.0f" rx="7" ry="7" fill="%s" opacity="0.85"/>`, bx, by, fw, bh, color)
|
||||
}
|
||||
// label
|
||||
fmt.Fprintf(&b, `<text x="%.0f" y="14" class="gt" font-weight="600" fill="%s">%s</text>`, w/2, color, label)
|
||||
// value
|
||||
fmt.Fprintf(&b, `<text x="%.0f" y="%.0f" class="gt" fill="#e6edf3" font-size="14" font-weight="700">%.1f%s</text>`, w/2, by+bh+24, pct, unit)
|
||||
b.WriteString(`</svg>`)
|
||||
return b.String()
|
||||
}
|
||||
|
||||
func noDataSVG(w, h int) string {
|
||||
return fmt.Sprintf(`<svg width="%d" height="%d" viewBox="0 0 %d %d" xmlns="http://www.w3.org/2000/svg"><text x="%d" y="%d" text-anchor="middle" fill="#6e7681" font-size="12" font-family="system-ui,sans-serif">No data</text></svg>`,
|
||||
w, h, w, h, w/2, h/2)
|
||||
}
|
||||
|
||||
// ── Refresh ──
|
||||
|
||||
func refresh() {
|
||||
svcs := fetchServices()
|
||||
|
||||
// Merge Jaeger-discovered services
|
||||
jaegerS := jaegerServices()
|
||||
for _, s := range jaegerS {
|
||||
found := false
|
||||
for _, sv := range svcs {
|
||||
if sv.Name == s {
|
||||
found = true
|
||||
break
|
||||
}
|
||||
}
|
||||
if !found {
|
||||
svcs = append(svcs, Service{Name: s, State: "jaeger"})
|
||||
}
|
||||
}
|
||||
sort.Slice(svcs, func(i, j int) bool {
|
||||
o := map[string]int{"running": 0, "jaeger": 1, "exited": 2, "restarting": 3}
|
||||
oi, oj := o[svcs[i].State], o[svcs[j].State]
|
||||
if oi != oj {
|
||||
return oi < oj
|
||||
}
|
||||
return svcs[i].Name < svcs[j].Name
|
||||
})
|
||||
|
||||
var traces []Trace
|
||||
for _, s := range svcs {
|
||||
if s.State == "running" {
|
||||
t := jaegerTraces(s.Name)
|
||||
traces = append(traces, t...)
|
||||
}
|
||||
}
|
||||
sort.Slice(traces, func(i, j int) bool { return traces[i].Duration > traces[j].Duration })
|
||||
if len(traces) > 20 {
|
||||
traces = traces[:20]
|
||||
}
|
||||
|
||||
// Prometheus OTel metrics
|
||||
rps := promRange("rate(otelcol_receiver_accepted_spans[1m])")
|
||||
lat := promRange("otelcol_receiver_accepted_spans")
|
||||
err := promRange("rate(otelcol_receiver_refused_spans[1m])")
|
||||
|
||||
// Node metrics
|
||||
node := fetchNodeMetrics()
|
||||
|
||||
state.mu.Lock()
|
||||
state.services = svcs
|
||||
state.tracesL = traces
|
||||
state.node = node
|
||||
|
||||
now := time.Now().Format("15:04:05")
|
||||
state.labels = append(state.labels, now)
|
||||
if len(state.labels) > maxPts {
|
||||
state.labels = state.labels[len(state.labels)-maxPts:]
|
||||
}
|
||||
|
||||
add := func(dst *[]float64, src []float64) {
|
||||
v := 0.0
|
||||
if len(src) > 0 {
|
||||
v = src[len(src)-1]
|
||||
}
|
||||
*dst = append(*dst, v)
|
||||
if len(*dst) > maxPts {
|
||||
*dst = (*dst)[len(*dst)-maxPts:]
|
||||
}
|
||||
}
|
||||
add(&state.rps, rps)
|
||||
add(&state.latency, lat)
|
||||
add(&state.errs, err)
|
||||
state.traces = append(state.traces, float64(len(traces)))
|
||||
if len(state.traces) > maxPts {
|
||||
state.traces = state.traces[len(state.traces)-maxPts:]
|
||||
}
|
||||
state.mu.Unlock()
|
||||
}
|
||||
|
||||
// autoDetectLinks generates links for all services with traefik labels
|
||||
func autoDetectLinks(svcs []Service) []Link {
|
||||
var links []Link
|
||||
links = append(links, Link{"/jaeger", "Jaeger UI"})
|
||||
|
||||
hasProm := false
|
||||
for _, s := range svcs {
|
||||
if s.Name == "prometheus" {
|
||||
hasProm = true
|
||||
}
|
||||
}
|
||||
if hasProm {
|
||||
links = append(links, Link{"/api/prometheus/targets", "Prometheus"})
|
||||
}
|
||||
links = append(links, Link{"https://github.com/asepharyana/asepharyana-hub", "GitHub"})
|
||||
|
||||
// auto-generate links for services with traefik labels
|
||||
domains := []string{"asepharyana.my.id", "asepharyana.web.id"}
|
||||
for _, s := range svcs {
|
||||
if s.HasWeb && s.State == "running" {
|
||||
for _, d := range domains {
|
||||
links = append(links, Link{fmt.Sprintf("https://%s.%s", s.Name, d), s.Name})
|
||||
break // one link per service
|
||||
}
|
||||
}
|
||||
}
|
||||
return links
|
||||
}
|
||||
|
||||
// ── Dashboard Handler ──
|
||||
|
||||
func dashboard(w http.ResponseWriter, _ *http.Request) {
|
||||
state.mu.Lock()
|
||||
svcs := append([]Service{}, state.services...)
|
||||
tr := append([]Trace{}, state.tracesL...)
|
||||
rps := append([]float64{}, state.rps...)
|
||||
lat := append([]float64{}, state.latency...)
|
||||
ers := append([]float64{}, state.errs...)
|
||||
trc := append([]float64{}, state.traces...)
|
||||
labels := append([]string{}, state.labels...)
|
||||
node := state.node
|
||||
state.mu.Unlock()
|
||||
|
||||
running, degraded := 0, 0
|
||||
for _, s := range svcs {
|
||||
if s.State == "running" {
|
||||
running++
|
||||
} else {
|
||||
degraded++
|
||||
}
|
||||
}
|
||||
|
||||
cpuColor, ramColor, diskColor := "#3fb950", "#3fb950", "#3fb950"
|
||||
if node.CPU > 80 {
|
||||
cpuColor = "#f85149"
|
||||
} else if node.CPU > 60 {
|
||||
cpuColor = "#d29922"
|
||||
}
|
||||
if node.RAM > 80 {
|
||||
ramColor = "#f85149"
|
||||
} else if node.RAM > 60 {
|
||||
ramColor = "#d29922"
|
||||
}
|
||||
if node.Disk > 80 {
|
||||
diskColor = "#f85149"
|
||||
} else if node.Disk > 60 {
|
||||
diskColor = "#d29922"
|
||||
}
|
||||
|
||||
data := DashboardData{
|
||||
Services: svcs, Running: running, Degraded: degraded,
|
||||
TraceCount: len(tr), RPS: rps, Latency: lat, Errors: ers,
|
||||
TraceVolume: trc, TraceList: tr, Labels: labels,
|
||||
SystemName: composeProject, TotalUp: running, TotalDown: degraded,
|
||||
Links: autoDetectLinks(svcs),
|
||||
HasOTelData: len(rps) > 0 || len(lat) > 0, // actual OTel collector metrics
|
||||
HasNodeData: node.Online,
|
||||
Node: node,
|
||||
HealthSVG: template.HTML(svgDonut(running, degraded)),
|
||||
RPSSVG: template.HTML(svgLine(rps, "#58a6ff")),
|
||||
LatencySVG: template.HTML(svgLine(lat, "#bc8cff")),
|
||||
ErrorSVG: template.HTML(svgLine(ers, "#f85149")),
|
||||
TraceSVG: template.HTML(svgLine(trc, "#3fb950")),
|
||||
CPUSVG: template.HTML(svgGauge(node.CPU, cpuColor, "CPU Usage", "%")),
|
||||
RAMSVG: template.HTML(svgGauge(node.RAM, ramColor, "Memory Usage", "%")),
|
||||
DiskSVG: template.HTML(svgGauge(node.Disk, diskColor, "Disk Usage", "%")),
|
||||
}
|
||||
|
||||
w.Header().Set("Content-Type", "text/html; charset=utf-8")
|
||||
if err := tmpl.Execute(w, data); err != nil {
|
||||
http.Error(w, err.Error(), 500)
|
||||
}
|
||||
}
|
||||
|
||||
// ── Proxy ──
|
||||
|
||||
func proxy(target string) http.Handler {
|
||||
u, _ := url.Parse(target)
|
||||
return httputil.NewSingleHostReverseProxy(u)
|
||||
}
|
||||
|
||||
func dockerHandler(w http.ResponseWriter, r *http.Request) {
|
||||
switch r.URL.Path {
|
||||
case "/api/docker/containers/json", "/api/docker/version":
|
||||
r.URL.Path = strings.TrimPrefix(r.URL.Path, "/api/docker")
|
||||
resp, err := dockerClient.Get("http://localhost" + r.URL.String() + "?" + r.URL.RawQuery)
|
||||
if err != nil {
|
||||
http.Error(w, err.Error(), 502)
|
||||
return
|
||||
}
|
||||
defer resp.Body.Close()
|
||||
for k, v := range resp.Header {
|
||||
w.Header()[k] = v
|
||||
}
|
||||
w.WriteHeader(resp.StatusCode)
|
||||
io.Copy(w, resp.Body)
|
||||
default:
|
||||
http.Error(w, "Forbidden", 403)
|
||||
}
|
||||
}
|
||||
|
||||
func healthHandler(w http.ResponseWriter, _ *http.Request) {
|
||||
resp, err := http.Get("http://otel-collector:13133/")
|
||||
if err != nil {
|
||||
http.Error(w, err.Error(), 502)
|
||||
return
|
||||
}
|
||||
defer resp.Body.Close()
|
||||
io.Copy(w, resp.Body)
|
||||
}
|
||||
|
||||
// ── Main ──
|
||||
|
||||
func main() {
|
||||
port := os.Getenv("PORT")
|
||||
if port == "" {
|
||||
port = "8080"
|
||||
}
|
||||
|
||||
refresh()
|
||||
go func() {
|
||||
for range time.Tick(15 * time.Second) {
|
||||
refresh()
|
||||
}
|
||||
}()
|
||||
|
||||
mux := http.NewServeMux()
|
||||
mux.HandleFunc("/", dashboard)
|
||||
mux.Handle("/api/jaeger/", http.StripPrefix("/api/jaeger", proxy("http://jaeger:16686/")))
|
||||
mux.Handle("/api/prometheus/", http.StripPrefix("/api/prometheus", proxy("http://prometheus:9090/")))
|
||||
mux.HandleFunc("/api/health", healthHandler)
|
||||
mux.HandleFunc("/api/docker/", dockerHandler)
|
||||
mux.Handle("/jaeger/", http.StripPrefix("/jaeger", proxy("http://jaeger:16686/")))
|
||||
|
||||
log.Printf("Dashboard listening on :%s", port)
|
||||
log.Fatal(http.ListenAndServe(":"+port, mux))
|
||||
}
|
||||
@@ -0,0 +1,262 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta charset="UTF-8">
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||||
<title>Hub Dashboard</title>
|
||||
<style>
|
||||
*{margin:0;padding:0;box-sizing:border-box}
|
||||
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:#0d1117;color:#e6edf3;line-height:1.5;-webkit-font-smoothing:antialiased}
|
||||
|
||||
/* ── Header ── */
|
||||
.hdr{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;border-bottom:1px solid #30363d;background:rgba(22,27,34,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);position:sticky;top:0;z-index:100;gap:8px}
|
||||
.hl{display:flex;align-items:center;gap:10px;min-width:0}
|
||||
.hl .l{width:28px;height:28px;border-radius:6px;background:linear-gradient(135deg,#58a6ff,#bc8cff);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px;color:#fff;flex-shrink:0}
|
||||
.hl h1{font-size:16px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
|
||||
.hl .s{color:#8b949e;font-size:11px;display:none}
|
||||
.hr{display:flex;align-items:center;gap:10px;flex-shrink:0}
|
||||
.hb{display:flex;align-items:center;gap:5px;font-size:11px;padding:4px 12px;border-radius:20px;font-weight:500;white-space:nowrap}
|
||||
.hb.g{background:rgba(63,185,80,.12);color:#3fb950}
|
||||
.hb.y{background:rgba(210,153,34,.12);color:#d29922}
|
||||
.hb.r{background:rgba(248,81,73,.12);color:#f85149}
|
||||
.hb .d{width:7px;height:7px;border-radius:50%}
|
||||
.hb.g .d{background:#3fb950}.hb.y .d{background:#d29922}.hb.r .d{background:#f85149}
|
||||
.up{color:#6e7681;font-size:10px;white-space:nowrap}
|
||||
|
||||
/* ── Container ── */
|
||||
.c{max-width:1440px;margin:0 auto;padding:12px 16px}
|
||||
|
||||
/* ── Grid — fully responsive ── */
|
||||
.g{display:grid;gap:10px}
|
||||
@media(min-width:481px){.g{gap:12px;padding:0 4px}}
|
||||
@media(min-width:769px){.g{grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:14px;padding:0 8px}}
|
||||
|
||||
/* ── Cards ── */
|
||||
.cd{background:#161b22;border:1px solid #30363d;border-radius:8px;padding:14px;transition:border-color .2s,box-shadow .2s}
|
||||
.cd:hover{border-color:#3d444d;box-shadow:0 0 0 1px transparent,0 1px 3px rgba(0,0,0,.3)}
|
||||
@media(max-width:480px){.cd{padding:12px;border-radius:6px}}
|
||||
|
||||
.ch{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;gap:8px}
|
||||
.ch h2{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:#8b949e;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
|
||||
.ch .b{font-size:9px;background:#1c2333;padding:2px 8px;border-radius:8px;color:#8b949e;white-space:nowrap;flex-shrink:0;line-height:1.6}
|
||||
.cg{display:flex;justify-content:center;align-items:center;width:100%}
|
||||
.cg svg{max-width:100%;height:auto}
|
||||
|
||||
/* ── Service tiles ── */
|
||||
.sg{display:flex;flex-wrap:wrap;gap:4px}
|
||||
.st{display:inline-flex;align-items:center;gap:5px;padding:5px 8px;border:1px solid #30363d;border-radius:5px;font-size:11px;transition:all .15s;cursor:default}
|
||||
.st:hover{background:#1c2333;border-color:#3d444d}
|
||||
.st .i{width:6px;height:6px;border-radius:50%;flex-shrink:0}
|
||||
.st .i.g{background:#3fb950}.st .i.r{background:#f85149}.st .i.y{background:#d29922}.st .i.b{background:#58a6ff}
|
||||
.st .n{font-family:'SF Mono','Fira Code',Consolas,monospace;font-size:10px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
|
||||
|
||||
/* ── Stat boxes ── */
|
||||
.sg2{display:grid;grid-template-columns:1fr 1fr;gap:6px}
|
||||
.sb{background:#1c2333;border-radius:6px;padding:10px 6px;text-align:center}
|
||||
.sv{font-size:20px;font-weight:700;font-family:'SF Mono','Fira Code',monospace;line-height:1.2}
|
||||
.sl2{font-size:9px;color:#8b949e;margin-top:2px;text-transform:uppercase;letter-spacing:.04em}
|
||||
.sv.a{color:#58a6ff}.sv.g{color:#3fb950}.sv.r{color:#f85149}.sv.y{color:#d29922}
|
||||
|
||||
/* ── System resource gauges ── */
|
||||
.sg3{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:6px}
|
||||
.ns{font-size:9px;color:#6e7681;text-align:center;margin-top:2px;padding-top:4px;border-top:1px solid #21262d}
|
||||
|
||||
/* ── Links ── */
|
||||
.lk{display:flex;flex-wrap:wrap;gap:4px}
|
||||
.lk a{color:#58a6ff;text-decoration:none;font-size:10px;padding:4px 8px;border:1px solid #30363d;border-radius:5px;transition:all .15s;line-height:1.4}
|
||||
.lk a:hover{background:#1c2333;border-color:#58a6ff}
|
||||
@media(max-width:480px){.lk a{padding:6px 10px;font-size:11px}}
|
||||
|
||||
/* ── Traces ── */
|
||||
.tl{list-style:none}
|
||||
.ti{padding:6px 0;border-bottom:1px solid #21262d;font-size:11px;display:flex;justify-content:space-between;align-items:center;gap:6px}
|
||||
.ti:last-child{border-bottom:none}
|
||||
.ts{font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
|
||||
.to{color:#8b949e;font-size:10px;font-family:'SF Mono','Fira Code',monospace;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:200px}
|
||||
.tt{display:flex;gap:8px;font-size:10px;color:#8b949e;flex-shrink:0;align-items:center}
|
||||
.td{font-family:'SF Mono',monospace;font-weight:500;color:#58a6ff}
|
||||
.te{color:#f85149;font-size:9px;padding:1px 5px;border-radius:3px;background:rgba(248,81,73,.1)}
|
||||
|
||||
.em{text-align:center;padding:16px;color:#6e7681;font-size:11px}
|
||||
|
||||
/* ── Scaling SVGs ── */
|
||||
.cg svg{width:100%;height:auto;max-width:340px}
|
||||
@media(min-width:481px){.cg svg{max-width:400px}}
|
||||
@media(max-width:480px){.cg svg{max-width:100%}}
|
||||
.sg3 .cg svg{max-width:100%}
|
||||
|
||||
/* ── Animations ── */
|
||||
.g>.cd{animation:fadeIn .3s ease}
|
||||
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
|
||||
|
||||
/* ── Mobile first (single column) ── */
|
||||
@media(min-width:481px){
|
||||
.c{padding:16px 20px}
|
||||
.hdr{padding:14px 24px}
|
||||
.g{gap:12px;grid-template-columns:1fr}
|
||||
}
|
||||
@media(min-width:640px){
|
||||
.g{grid-template-columns:repeat(2,1fr)}
|
||||
.hl .s{display:inline}
|
||||
}
|
||||
@media(min-width:1024px){
|
||||
.g{grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:14px}
|
||||
.c{padding:20px 28px}
|
||||
.sg3{grid-template-columns:repeat(3,1fr)}
|
||||
}
|
||||
@media(min-width:1280px){
|
||||
.g{gap:16px;grid-template-columns:repeat(auto-fill,minmax(350px,1fr))}
|
||||
.c{padding:24px 32px}
|
||||
}
|
||||
|
||||
/* ── Dark scrollbar ── */
|
||||
::-webkit-scrollbar{width:8px;height:8px}
|
||||
::-webkit-scrollbar-track{background:transparent}
|
||||
::-webkit-scrollbar-thumb{background:#30363d;border-radius:4px}
|
||||
::-webkit-scrollbar-thumb:hover{background:#3d444d}
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
|
||||
<div class="hdr">
|
||||
<div class="hl">
|
||||
<div class="l">H</div>
|
||||
<div>
|
||||
<h1>{{.SystemName}}</h1>
|
||||
<div class="s">System Dashboard</div>
|
||||
</div>
|
||||
</div>
|
||||
<div class="hr">
|
||||
{{if eq .TotalDown 0}}
|
||||
<span class="hb g"><span class="d"></span> <span class="hbl">All Systems Operational</span></span>
|
||||
{{else if lt .TotalDown 3}}
|
||||
<span class="hb y"><span class="d"></span> {{.TotalDown}} degraded</span>
|
||||
{{else}}
|
||||
<span class="hb r"><span class="d"></span> {{.TotalDown}} services down</span>
|
||||
{{end}}
|
||||
<span class="up" id="ts"></span>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div class="c">
|
||||
<div class="g">
|
||||
|
||||
<!-- Services -->
|
||||
<div class="cd">
|
||||
<div class="ch"><h2>Services</h2><span class="b">{{len .Services}}</span></div>
|
||||
<div class="sg">
|
||||
{{range .Services}}
|
||||
<span class="st">
|
||||
<span class="i {{if eq .State "running"}}g{{else if eq .State "jaeger"}}b{{else}}r{{end}}"></span>
|
||||
<span class="n">{{.Name}}</span>
|
||||
</span>
|
||||
{{else}}<div class="em">No services detected</div>{{end}}
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<!-- Overview -->
|
||||
<div class="cd">
|
||||
<div class="ch"><h2>Overview</h2></div>
|
||||
<div class="sg2">
|
||||
<div class="sb"><div class="sv a">{{len .Services}}</div><div class="sl2">Total</div></div>
|
||||
<div class="sb"><div class="sv a">{{.Running}}</div><div class="sl2">Healthy</div></div>
|
||||
<div class="sb"><div class="sv g">{{.TraceCount}}</div><div class="sl2">Traces</div></div>
|
||||
<div class="sb"><div class="sv r">{{if .Errors}}{{printf "%.0f" (index .Errors (sub (len .Errors) 1))}}{{else}}0{{end}}</div><div class="sl2">Errors</div></div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<!-- Health Donut -->
|
||||
<div class="cd">
|
||||
<div class="ch"><h2>Health</h2></div>
|
||||
<div class="cg">{{.HealthSVG}}</div>
|
||||
</div>
|
||||
|
||||
<!-- Links -->
|
||||
<div class="cd">
|
||||
<div class="ch"><h2>Links</h2></div>
|
||||
<div class="lk">
|
||||
{{range .Links}}<a href="{{.URL}}" target="_blank">{{.Label}}</a>{{end}}
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<!-- System Resources (auto jika ada data) -->
|
||||
{{if .HasNodeData}}
|
||||
<div class="cd">
|
||||
<div class="ch"><h2>System Resources</h2>
|
||||
<span class="b">{{printf "%.2f" .Node.Load1}} {{printf "%.2f" .Node.Load5}} {{printf "%.2f" .Node.Load15}}</span>
|
||||
</div>
|
||||
<div class="sg3">
|
||||
<div class="cg">{{.CPUSVG}}</div>
|
||||
<div class="cg">{{.RAMSVG}}</div>
|
||||
<div class="cg">{{.DiskSVG}}</div>
|
||||
</div>
|
||||
{{if .Node.NetIn}}<div class="ns">↑ {{printf "%.1f" .Node.NetOut}} B/s ↓ {{printf "%.1f" .Node.NetIn}} B/s</div>{{end}}
|
||||
</div>
|
||||
{{end}}
|
||||
|
||||
<!-- Request Rate (auto jika OTel aktif) -->
|
||||
{{if .HasOTelData}}
|
||||
<div class="cd">
|
||||
<div class="ch"><h2>Request Rate</h2>
|
||||
<span class="b">{{if .RPS}}{{printf "%.1f" (index .RPS (sub (len .RPS) 1))}}/s{{else}}-{{end}}</span>
|
||||
</div>
|
||||
<div class="cg">{{.RPSSVG}}</div>
|
||||
</div>
|
||||
|
||||
<div class="cd">
|
||||
<div class="ch"><h2>Latency</h2>
|
||||
<span class="b">{{if .Latency}}{{printf "%.0f" (index .Latency (sub (len .Latency) 1))}}ms{{else}}-{{end}}</span>
|
||||
</div>
|
||||
<div class="cg">{{.LatencySVG}}</div>
|
||||
</div>
|
||||
|
||||
<div class="cd">
|
||||
<div class="ch"><h2>Error Rate</h2>
|
||||
<span class="b">{{if .Errors}}{{printf "%.1f" (index .Errors (sub (len .Errors) 1))}}/s{{else}}-{{end}}</span>
|
||||
</div>
|
||||
<div class="cg">{{.ErrorSVG}}</div>
|
||||
</div>
|
||||
{{end}}
|
||||
|
||||
<!-- Trace Volume -->
|
||||
<div class="cd">
|
||||
<div class="ch"><h2>Trace Volume</h2><span class="b">{{.TraceCount}} traces</span></div>
|
||||
<div class="cg">{{.TraceSVG}}</div>
|
||||
</div>
|
||||
|
||||
<!-- Recent Traces -->
|
||||
<div class="cd">
|
||||
<div class="ch"><h2>Recent Traces</h2><span class="b">{{.TraceCount}}</span></div>
|
||||
{{if .TraceList}}
|
||||
<div class="tl">
|
||||
{{range .TraceList}}
|
||||
<div class="ti">
|
||||
<div style="overflow:hidden;min-width:0">
|
||||
<div class="ts">{{.Service}}</div>
|
||||
<div class="to">{{.Operation}}</div>
|
||||
</div>
|
||||
<div class="tt">
|
||||
<span class="td">{{safeDur .Duration}}</span>
|
||||
<span>{{.Spans}}</span>
|
||||
{{if .HasError}}<span class="te">err</span>{{end}}
|
||||
</div>
|
||||
</div>
|
||||
{{end}}
|
||||
</div>
|
||||
{{else}}<div class="em">No traces — data appears once services send OTel telemetry</div>{{end}}
|
||||
</div>
|
||||
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<script>
|
||||
(function(){
|
||||
var ts = document.getElementById('ts');
|
||||
function tick(){ ts.textContent = new Date().toLocaleTimeString([],{hour:'2-digit',minute:'2-digit'}) }
|
||||
tick();
|
||||
setInterval(tick, 10000);
|
||||
setTimeout(function(){ location.reload(); }, 15000);
|
||||
})();
|
||||
</script>
|
||||
</body>
|
||||
</html>
|
||||
Reference in New Issue
Block a user