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/*
* This file is part of caronte (https://github.com/eciavatta/caronte).
* Copyright (c) 2020 Emiliano Ciavatta.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"context"
"github.com/gin-gonic/gin"
"github.com/shirou/gopsutil/cpu"
"github.com/shirou/gopsutil/disk"
"github.com/shirou/gopsutil/mem"
log "github.com/sirupsen/logrus"
"sync"
"time"
)
const (
averageCPUPercentAlertThreshold = 90.0
averageCPUPercentAlertMinInterval = 120.0
)
type SystemStats struct {
VirtualMemory *mem.VirtualMemoryStat `json:"virtual_memory"`
CPUTimes []cpu.TimesStat `json:"cpu_times"`
CPUPercents []float64 `json:"cpu_percents"`
DiskUsage *disk.UsageStat `json:"disk_usage"`
}
type ResourcesController struct {
notificationController *NotificationController
lastCPUPercent []float64
mutex sync.Mutex
}
func NewResourcesController(notificationController *NotificationController) *ResourcesController {
return &ResourcesController{
notificationController: notificationController,
}
}
func (csc *ResourcesController) GetProcessStats(c context.Context) interface{} {
return nil
}
func (csc *ResourcesController) GetSystemStats(c context.Context) SystemStats {
virtualMemory, err := mem.VirtualMemoryWithContext(c)
if err != nil {
log.WithError(err).Panic("failed to retrieve virtual memory")
}
cpuTimes, err := cpu.TimesWithContext(c, true)
if err != nil {
log.WithError(err).Panic("failed to retrieve cpu times")
}
diskUsage, err := disk.UsageWithContext(c, "/")
if err != nil {
log.WithError(err).Panic("failed to retrieve disk usage")
}
defer csc.mutex.Unlock()
csc.mutex.Lock()
return SystemStats{
VirtualMemory: virtualMemory,
CPUTimes: cpuTimes,
DiskUsage: diskUsage,
CPUPercents: csc.lastCPUPercent,
}
}
func (csc *ResourcesController) Run() {
interval, _ := time.ParseDuration("3s")
var lastAlertTime time.Time
for {
cpuPercent, err := cpu.Percent(interval, true)
if err != nil {
log.WithError(err).Error("failed to retrieve cpu percent")
return
}
csc.mutex.Lock()
csc.lastCPUPercent = cpuPercent
csc.mutex.Unlock()
avg := Average(cpuPercent)
if avg > averageCPUPercentAlertThreshold && time.Now().Sub(lastAlertTime).Seconds() > averageCPUPercentAlertMinInterval {
csc.notificationController.Notify("resources.cpu_alert", gin.H{
"cpu_percent": cpuPercent,
})
log.WithField("cpu_percent", cpuPercent).Warn("cpu percent usage has exceeded the limit threshold")
lastAlertTime = time.Now()
}
}
}
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