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devops_host.go
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devops_host.go
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package devops
import (
"fmt"
. "github.com/influxdata/influxdb-comparisons/bulk_data_gen/common"
"math/rand"
"time"
)
const NHostSims = 9
// Count of choices for auto-generated tag values:
const (
MachineRackChoicesPerDatacenter = 100
MachineServiceChoices = 20
MachineServiceVersionChoices = 2
)
type Region struct {
Name []byte
Datacenters [][]byte
}
var (
// Choices of regions and their datacenters.
Regions = []Region{
{
[]byte("us-east-1"), [][]byte{
[]byte("us-east-1a"),
[]byte("us-east-1b"),
[]byte("us-east-1c"),
[]byte("us-east-1e"),
},
},
{
[]byte("us-west-1"), [][]byte{
[]byte("us-west-1a"),
[]byte("us-west-1b"),
},
},
{
[]byte("us-west-2"), [][]byte{
[]byte("us-west-2a"),
[]byte("us-west-2b"),
[]byte("us-west-2c"),
},
},
{
[]byte("eu-west-1"), [][]byte{
[]byte("eu-west-1a"),
[]byte("eu-west-1b"),
[]byte("eu-west-1c"),
},
},
{
[]byte("eu-central-1"), [][]byte{
[]byte("eu-central-1a"),
[]byte("eu-central-1b"),
},
},
{
[]byte("ap-southeast-1"), [][]byte{
[]byte("ap-southeast-1a"),
[]byte("ap-southeast-1b"),
},
},
{
[]byte("ap-southeast-2"), [][]byte{
[]byte("ap-southeast-2a"),
[]byte("ap-southeast-2b"),
},
},
{
[]byte("ap-northeast-1"), [][]byte{
[]byte("ap-northeast-1a"),
[]byte("ap-northeast-1c"),
},
},
{
[]byte("sa-east-1"), [][]byte{
[]byte("sa-east-1a"),
[]byte("sa-east-1b"),
[]byte("sa-east-1c"),
},
},
}
)
var (
MachineTeamChoices = [][]byte{
[]byte("SF"),
[]byte("NYC"),
[]byte("LON"),
[]byte("CHI"),
}
MachineOSChoices = [][]byte{
[]byte("Ubuntu16.10"),
[]byte("Ubuntu16.04LTS"),
[]byte("Ubuntu15.10"),
}
MachineArchChoices = [][]byte{
[]byte("x64"),
[]byte("x86"),
}
MachineServiceEnvironmentChoices = [][]byte{
[]byte("production"),
[]byte("staging"),
[]byte("test"),
}
)
var (
// The duration of a log epoch.
EpochDuration = 10 * time.Second
// Tag fields common to all hosts:
MachineTagKeys = [][]byte{
[]byte("hostname"),
[]byte("region"),
[]byte("datacenter"),
[]byte("rack"),
[]byte("os"),
[]byte("arch"),
[]byte("team"),
[]byte("service"),
[]byte("service_version"),
[]byte("service_environment"),
}
)
// Type Host models a machine being monitored by Telegraf.
type Host struct {
SimulatedMeasurements []SimulatedMeasurement
// These are all assigned once, at Host creation:
Name, Region, Datacenter, Rack, OS, Arch []byte
Team, Service, ServiceVersion, ServiceEnvironment []byte
}
func NewHostMeasurements(start time.Time) []SimulatedMeasurement {
sm := []SimulatedMeasurement{
NewCPUMeasurement(start),
NewDiskIOMeasurement(start),
NewDiskMeasurement(start, 0),
NewKernelMeasurement(start),
NewMemMeasurement(start),
NewNetMeasurement(start),
NewNginxMeasurement(start),
NewPostgresqlMeasurement(start),
NewRedisMeasurement(start),
}
if len(sm) != NHostSims {
panic("logic error: incorrect number of measurements")
}
return sm
}
func NewHost(i int, offset int, start time.Time) Host {
sm := NewHostMeasurements(start)
region := &Regions[rand.Intn(len(Regions))]
rackId := rand.Int63n(MachineRackChoicesPerDatacenter)
serviceId := rand.Int63n(MachineServiceChoices)
serviceVersionId := rand.Int63n(MachineServiceVersionChoices)
serviceEnvironment := RandChoice(MachineServiceEnvironmentChoices)
h := Host{
// Tag Values that are static throughout the life of a Host:
Name: []byte(fmt.Sprintf("host_%d", i+offset)),
Region: []byte(fmt.Sprintf("%s", region.Name)),
Datacenter: RandChoice(region.Datacenters),
Rack: []byte(fmt.Sprintf("%d", rackId)),
Arch: RandChoice(MachineArchChoices),
OS: RandChoice(MachineOSChoices),
Service: []byte(fmt.Sprintf("%d", serviceId)),
ServiceVersion: []byte(fmt.Sprintf("%d", serviceVersionId)),
ServiceEnvironment: serviceEnvironment,
Team: RandChoice(MachineTeamChoices),
SimulatedMeasurements: sm,
}
return h
}
// TickAll advances all Distributions of a Host.
func (h *Host) TickAll(d time.Duration) {
for i := range h.SimulatedMeasurements {
h.SimulatedMeasurements[i].Tick(d)
}
}