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Many fixes. Compute real cpu usage of vms.

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This commit is contained in:
wescoeur 2016-02-26 15:28:00 +01:00
parent dee7767427
commit 7abba0a69b
1 changed files with 35 additions and 22 deletions
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57
packages/xo-server-load-balancer/src/index.js
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@ -21,7 +21,7 @@ const MINUTES_OF_HISTORICAL_DATA = 30
// Threshold cpu in percent.
// const CRITICAL_THRESHOLD_CPU = 90
const HIGH_THRESHOLD_CPU = 76.5
const HIGH_THRESHOLD_CPU = 0 // 76.5
// const LOW_THRESHOLD_CPU = 22.5
// const CRITICAL_THRESHOLD_FREE_MEMORY = 51
@ -141,49 +141,55 @@ function computeAverage (values, nPoints = values.length) {
return sum / tot
}
function computeRessourcesAverage (hosts, hostsStats, nPoints) {
function computeRessourcesAverage (objects, objectsStats, nPoints) {
const averages = {}
for (const host of hosts) {
const hostId = host.id
const hostAverages = averages[hostId] = {}
const { stats } = hostsStats[hostId]
for (const object of objects) {
const { id } = object
const { stats } = objectsStats[id]
const objectAverages = averages[id] = {}
hostAverages.cpus = computeAverage(
objectAverages.cpus = computeAverage(
mapToArray(stats.cpus, cpu => computeAverage(cpu, nPoints))
)
hostAverages.memoryFree = computeAverage(stats.memoryFree, nPoints)
objectAverages.memoryFree = computeAverage(stats.memoryFree, nPoints)
objectAverages.memoryUsed = computeAverage(stats.memoryUsed, nPoints)
}
return averages
}
function checkRessourcesThresholds (hosts, averages) {
return filter(hosts, host => {
const hostAverages = averages[host.id]
function checkRessourcesThresholds (objects, averages) {
return filter(objects, object => {
const objectAverages = averages[object.id]
return (
hostAverages.cpus >= HIGH_THRESHOLD_CPU ||
hostAverages.memoryFree >= HIGH_THRESHOLD_FREE_MEMORY
objectAverages.cpus >= HIGH_THRESHOLD_CPU ||
objectAverages.memoryFree >= HIGH_THRESHOLD_FREE_MEMORY
)
})
}
function computeRessourcesAverageWithRatio (hosts, averages1, averages2, ratio) {
function computeRessourcesAverageWithWeight (averages1, averages2, ratio) {
const averages = {}
for (const host of hosts) {
const hostId = host.id
const hostAverages = averages[hostId] = {}
for (const id in averages1) {
const objectAverages = averages[id] = {}
for (const averageName in hostAverages) {
hostAverages[averageName] = averages1[averageName] * ratio + averages2[averageName] * (1 - ratio)
for (const averageName in averages1[id]) {
objectAverages[averageName] = averages1[id][averageName] * ratio + averages2[id][averageName] * (1 - ratio)
}
}
return averages
}
function setRealCpuAverageOfVms (vms, vmsAverages) {
for (const vm of vms) {
vmsAverages[vm.id].cpus /= vm.CPUs.number
}
}
// ===================================================================
class Plan {
@ -218,7 +224,7 @@ class Plan {
// 2. Check in the last 30 min interval with ratio.
const avgBefore = computeRessourcesAverage(hosts, hostsStats, MINUTES_OF_HISTORICAL_DATA)
const avgWithRatio = computeRessourcesAverageWithRatio(exceededHosts, avgNow, avgBefore, 0.75)
const avgWithRatio = computeRessourcesAverageWithWeight(avgNow, avgBefore, 0.75)
exceededHosts = checkRessourcesThresholds(exceededHosts, avgWithRatio)
// No ressource's utilization problem.
@ -251,15 +257,22 @@ class Plan {
}
async _computeOptimizations (exceededHost, hostsAverages) {
// Get the vms and stats from exceeded hosts.
const vms = await this._getVms(exceededHost.id)
const vmsStats = await this._getVmsStats(vms, 'minutes')
const vmsAverages = computeRessourcesAverageWithWeight(
computeRessourcesAverage(vms, vmsStats, EXECUTION_DELAY),
computeRessourcesAverage(vms, vmsStats, MINUTES_OF_HISTORICAL_DATA),
0.75
)
// Compute real CPU usage. Virtuals cpus to real cpu.
setRealCpuAverageOfVms(vms, vmsAverages)
// TODO
}
async _applyOptimizations (optimizations) {
throw new Error('not yet implemented')
// throw new Error('not yet implemented')
}
// Compute hosts for each pool. They can change over time.