Nathan Coad
c8bb30c788
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continuous-integration/drone/push Build is passing
237 lines
7.0 KiB
Go
237 lines
7.0 KiB
Go
package handler
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import (
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"fmt"
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"net/http"
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"strings"
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"time"
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"vctp/components/views"
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"vctp/db"
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)
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// VmTrace shows per-snapshot details for a VM across all snapshots.
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// @Summary Trace VM history
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// @Description Shows VM resource history across snapshots, with chart and table.
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// @Tags vm
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// @Produce text/html
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// @Param vm_id query string false "VM ID"
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// @Param vm_uuid query string false "VM UUID"
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// @Param name query string false "VM name"
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// @Success 200 {string} string "HTML page"
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// @Failure 400 {string} string "Missing identifier"
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// @Router /vm/trace [get]
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func (h *Handler) VmTrace(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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vmID := r.URL.Query().Get("vm_id")
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vmUUID := r.URL.Query().Get("vm_uuid")
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name := r.URL.Query().Get("name")
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var entries []views.VmTraceEntry
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chart := views.VmTraceChart{}
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queryLabel := firstNonEmpty(vmID, vmUUID, name)
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displayQuery := ""
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if queryLabel != "" {
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displayQuery = " for " + queryLabel
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}
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creationLabel := ""
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deletionLabel := ""
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creationApprox := false
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// Only fetch data when a query is provided; otherwise render empty page with form.
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if vmID != "" || vmUUID != "" || name != "" {
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h.Logger.Info("vm trace request", "vm_id", vmID, "vm_uuid", vmUUID, "name", name)
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lifecycle, lifeErr := db.FetchVmLifecycle(ctx, h.Database.DB(), vmID, vmUUID, name)
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if lifeErr != nil {
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h.Logger.Warn("failed to fetch VM lifecycle", "error", lifeErr)
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}
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rows, err := db.FetchVmTrace(ctx, h.Database.DB(), vmID, vmUUID, name)
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if err != nil {
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h.Logger.Error("failed to fetch VM trace", "error", err)
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http.Error(w, fmt.Sprintf("failed to fetch VM trace: %v", err), http.StatusInternalServerError)
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return
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}
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h.Logger.Info("vm trace results", "row_count", len(rows))
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entries = make([]views.VmTraceEntry, 0, len(rows))
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for _, row := range rows {
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creation := int64(0)
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if row.CreationTime.Valid {
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creation = row.CreationTime.Int64
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}
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deletion := int64(0)
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if row.DeletionTime.Valid {
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deletion = row.DeletionTime.Int64
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}
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entries = append(entries, views.VmTraceEntry{
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Snapshot: time.Unix(row.SnapshotTime, 0).Local().Format("2006-01-02 15:04:05"),
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RawTime: row.SnapshotTime,
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Name: row.Name,
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VmId: row.VmId,
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VmUuid: row.VmUuid,
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Vcenter: row.Vcenter,
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ResourcePool: row.ResourcePool,
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VcpuCount: row.VcpuCount,
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RamGB: row.RamGB,
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ProvisionedDisk: row.ProvisionedDisk,
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CreationTime: formatMaybeTime(creation),
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DeletionTime: formatMaybeTime(deletion),
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})
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}
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chart = buildVmTraceChart(entries)
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if len(entries) > 0 {
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if lifecycle.CreationTime > 0 {
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ts := time.Unix(lifecycle.CreationTime, 0).Local().Format("2006-01-02 15:04:05")
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if lifecycle.CreationApprox {
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creationLabel = fmt.Sprintf("%s (approx. earliest snapshot)", ts)
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// dont double up on the approximate text
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//creationApprox = true
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} else {
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creationLabel = ts
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}
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} else {
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creationLabel = time.Unix(entries[0].RawTime, 0).Local().Format("2006-01-02 15:04:05")
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creationApprox = true
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}
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if lifecycle.DeletionTime > 0 {
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deletionLabel = time.Unix(lifecycle.DeletionTime, 0).Local().Format("2006-01-02 15:04:05")
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}
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}
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}
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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if err := views.VmTracePage(queryLabel, displayQuery, vmID, vmUUID, name, creationLabel, deletionLabel, creationApprox, entries, chart).Render(ctx, w); err != nil {
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http.Error(w, "Failed to render template", http.StatusInternalServerError)
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}
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}
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func buildVmTraceChart(entries []views.VmTraceEntry) views.VmTraceChart {
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if len(entries) == 0 {
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return views.VmTraceChart{}
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}
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width := 1200.0
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height := 220.0
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plotWidth := width - 60.0
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startX := 40.0
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maxVal := float64(0)
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for _, e := range entries {
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if float64(e.VcpuCount) > maxVal {
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maxVal = float64(e.VcpuCount)
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}
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if float64(e.RamGB) > maxVal {
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maxVal = float64(e.RamGB)
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}
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}
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if maxVal == 0 {
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maxVal = 1
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}
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stepX := plotWidth
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if len(entries) > 1 {
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stepX = plotWidth / float64(len(entries)-1)
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}
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scale := height / maxVal
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var ptsVcpu, ptsRam, ptsTin, ptsBronze, ptsSilver, ptsGold string
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appendPt := func(s string, x, y float64) string {
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if s == "" {
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return fmt.Sprintf("%.1f,%.1f", x, y)
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}
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return s + " " + fmt.Sprintf("%.1f,%.1f", x, y)
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}
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for i, e := range entries {
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x := startX + float64(i)*stepX
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yVcpu := 10 + height - float64(e.VcpuCount)*scale
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yRam := 10 + height - float64(e.RamGB)*scale
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ptsVcpu = appendPt(ptsVcpu, x, yVcpu)
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ptsRam = appendPt(ptsRam, x, yRam)
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poolY := map[string]float64{
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"tin": 10 + height - scale*maxVal,
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"bronze": 10 + height - scale*maxVal*0.9,
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"silver": 10 + height - scale*maxVal*0.8,
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"gold": 10 + height - scale*maxVal*0.7,
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}
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lower := strings.ToLower(e.ResourcePool)
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if lower == "tin" {
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ptsTin = appendPt(ptsTin, x, poolY["tin"])
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} else {
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ptsTin = appendPt(ptsTin, x, 10+height)
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}
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if lower == "bronze" {
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ptsBronze = appendPt(ptsBronze, x, poolY["bronze"])
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} else {
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ptsBronze = appendPt(ptsBronze, x, 10+height)
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}
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if lower == "silver" {
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ptsSilver = appendPt(ptsSilver, x, poolY["silver"])
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} else {
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ptsSilver = appendPt(ptsSilver, x, 10+height)
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}
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if lower == "gold" {
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ptsGold = appendPt(ptsGold, x, poolY["gold"])
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} else {
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ptsGold = appendPt(ptsGold, x, 10+height)
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}
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}
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gridY := []float64{}
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for i := 0; i <= 4; i++ {
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gridY = append(gridY, 10+float64(i)*(height/4))
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}
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gridX := []float64{}
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for i := 0; i < len(entries); i++ {
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gridX = append(gridX, startX+float64(i)*stepX)
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}
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yTicks := []views.ChartTick{}
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for i := 0; i <= 4; i++ {
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val := maxVal * float64(4-i) / 4
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pos := 10 + float64(i)*(height/4)
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yTicks = append(yTicks, views.ChartTick{Pos: pos, Label: fmt.Sprintf("%.0f", val)})
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}
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xTicks := []views.ChartTick{}
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maxTicks := 8
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stepIdx := 1
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if len(entries) > 1 {
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stepIdx = (len(entries)-1)/maxTicks + 1
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}
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for idx := 0; idx < len(entries); idx += stepIdx {
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x := startX + float64(idx)*stepX
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label := time.Unix(entries[idx].RawTime, 0).Local().Format("01-02 15:04")
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xTicks = append(xTicks, views.ChartTick{Pos: x, Label: label})
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}
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if len(entries) > 1 {
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lastIdx := len(entries) - 1
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xLast := startX + float64(lastIdx)*stepX
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labelLast := time.Unix(entries[lastIdx].RawTime, 0).Local().Format("01-02 15:04")
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if len(xTicks) == 0 || xTicks[len(xTicks)-1].Pos != xLast {
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xTicks = append(xTicks, views.ChartTick{Pos: xLast, Label: labelLast})
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}
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}
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return views.VmTraceChart{
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PointsVcpu: ptsVcpu,
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PointsRam: ptsRam,
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PointsTin: ptsTin,
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PointsBronze: ptsBronze,
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PointsSilver: ptsSilver,
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PointsGold: ptsGold,
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Width: int(width),
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Height: int(height),
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GridX: gridX,
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GridY: gridY,
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XTicks: xTicks,
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YTicks: yTicks,
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}
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}
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func firstNonEmpty(vals ...string) string {
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for _, v := range vals {
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if v != "" {
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return v
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}
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}
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return ""
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}
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func formatMaybeTime(ts int64) string {
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if ts == 0 {
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return ""
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}
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return time.Unix(ts, 0).Local().Format("2006-01-02 15:04:05")
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}
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