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109 lines
3.7 KiB
Go
109 lines
3.7 KiB
Go
// Copyright (c) 2022 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package cmd
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import (
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"context"
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"time"
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)
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type rebalPoolProgress struct {
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NumObjects uint64 `json:"objects"`
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NumVersions uint64 `json:"versions"`
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Bytes uint64 `json:"bytes"`
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Bucket string `json:"bucket"`
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Object string `json:"object"`
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Elapsed time.Duration `json:"elapsed"`
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ETA time.Duration `json:"eta"`
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}
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type rebalancePoolStatus struct {
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ID int `json:"id"` // Pool index (zero-based)
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Status string `json:"status"` // Active if rebalance is running, empty otherwise
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Used float64 `json:"used"` // Percentage used space
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Progress rebalPoolProgress `json:"progress,omitempty"` // is empty when rebalance is not running
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}
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// rebalanceAdminStatus holds rebalance status related information exported to mc, console, etc.
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type rebalanceAdminStatus struct {
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ID string // identifies the ongoing rebalance operation by a uuid
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Pools []rebalancePoolStatus `json:"pools"` // contains all pools, including inactive
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StoppedAt time.Time `json:"stoppedAt,omitempty"`
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}
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func rebalanceStatus(ctx context.Context, z *erasureServerPools) (r rebalanceAdminStatus, err error) {
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// Load latest rebalance status
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meta := &rebalanceMeta{}
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err = meta.load(ctx, z.serverPools[0])
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if err != nil {
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return r, err
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}
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// Compute disk usage percentage
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si := z.StorageInfo(ctx)
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diskStats := make([]struct {
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AvailableSpace uint64
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TotalSpace uint64
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}, len(z.serverPools))
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for _, disk := range si.Disks {
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diskStats[disk.PoolIndex].AvailableSpace += disk.AvailableSpace
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diskStats[disk.PoolIndex].TotalSpace += disk.TotalSpace
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}
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stopTime := meta.StoppedAt
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r = rebalanceAdminStatus{
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ID: meta.ID,
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StoppedAt: meta.StoppedAt,
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Pools: make([]rebalancePoolStatus, len(meta.PoolStats)),
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}
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for i, ps := range meta.PoolStats {
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r.Pools[i] = rebalancePoolStatus{
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ID: i,
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Status: ps.Info.Status.String(),
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Used: float64(diskStats[i].TotalSpace-diskStats[i].AvailableSpace) / float64(diskStats[i].TotalSpace),
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}
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if !ps.Participating {
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continue
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}
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// for participating pools, total bytes to be rebalanced by this pool is given by,
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// pf_c = (f_i + x)/c_i,
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// pf_c - percentage free space across pools, f_i - ith pool's free space, c_i - ith pool's capacity
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// i.e. x = c_i*pfc -f_i
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totalBytesToRebal := float64(ps.InitCapacity)*meta.PercentFreeGoal - float64(ps.InitFreeSpace)
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elapsed := time.Since(ps.Info.StartTime)
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eta := time.Duration(totalBytesToRebal * float64(elapsed) / float64(ps.Bytes))
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if !ps.Info.EndTime.IsZero() {
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stopTime = ps.Info.EndTime
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}
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if !stopTime.IsZero() { // rebalance is stopped or completed
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elapsed = stopTime.Sub(ps.Info.StartTime)
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eta = 0
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}
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r.Pools[i].Progress = rebalPoolProgress{
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NumObjects: ps.NumObjects,
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NumVersions: ps.NumVersions,
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Bytes: ps.Bytes,
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Elapsed: elapsed,
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ETA: eta,
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}
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}
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return r, nil
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}
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