|
| 1 | +package feeder |
| 2 | + |
| 3 | +import ( |
| 4 | +"context" |
| 5 | +"encoding/json" |
| 6 | +"fmt" |
| 7 | +"github.com/strabox/caravela-sim/configuration" |
| 8 | +"github.com/strabox/caravela-sim/engine/metrics" |
| 9 | +"github.com/strabox/caravela-sim/mocks/caravela" |
| 10 | +"github.com/strabox/caravela-sim/util" |
| 11 | +"github.com/strabox/caravela/api/types" |
| 12 | +caravelaConfigs "github.com/strabox/caravela/configuration" |
| 13 | +"github.com/strabox/caravela/node" |
| 14 | +caravelaUtil "github.com/strabox/caravela/util" |
| 15 | +"math" |
| 16 | +"math/rand" |
| 17 | +"os" |
| 18 | +"strconv" |
| 19 | +"sync" |
| 20 | +"time" |
| 21 | +) |
| 22 | + |
| 23 | +const logJsonFeederTag = "JS-FEEDER" |
| 24 | + |
| 25 | +// jsonFeeder generates a stream of user requests reading from a json file. |
| 26 | +type jsonFeeder struct { |
| 27 | +collector *metrics.Collector // Metrics collector that collects system level metrics. |
| 28 | +reqInjectionNode sync.Map // Map of ContainerID<->NodeIndex. |
| 29 | +systemTotalResources types.Resources // Caravela's maximum resources. |
| 30 | +randomGenerator *rand.Rand // Pseudo-random generator. |
| 31 | +simConfigs *configuration.Configuration // Simulator's configurations. |
| 32 | +caravelaConfigs *caravelaConfigs.Configuration // Caravela's configurations. |
| 33 | +} |
| 34 | + |
| 35 | +// newJsonFeeder creates a new json feeder. |
| 36 | +func newJsonFeeder(simConfigs *configuration.Configuration, caravelaConfigs *caravelaConfigs.Configuration, rngSeed int64) (Feeder, error) { |
| 37 | +return &jsonFeeder{ |
| 38 | +collector: nil, |
| 39 | +reqInjectionNode: sync.Map{}, |
| 40 | +randomGenerator: rand.New(caravelaUtil.NewSourceSafe(rand.NewSource(rngSeed))), |
| 41 | +simConfigs: simConfigs, |
| 42 | +caravelaConfigs: caravelaConfigs, |
| 43 | +}, nil |
| 44 | +} |
| 45 | + |
| 46 | +func (j *jsonFeeder) Init(metricsCollector *metrics.Collector, systemTotalResources types.Resources) { |
| 47 | +j.collector = metricsCollector |
| 48 | +j.systemTotalResources = systemTotalResources |
| 49 | +} |
| 50 | + |
| 51 | +func (j *jsonFeeder) Start(ticksChannel <-chan chan RequestTask) { |
| 52 | +type Request struct { |
| 53 | +Time int64 `json:"Time"` |
| 54 | +JobID int64 `json:"job id"` |
| 55 | +EventType int `json:"event type"` |
| 56 | +User string `json:"user"` |
| 57 | +CPUs float64 `json:"CPU request"` |
| 58 | +Memory float64 `json:"memory request"` |
| 59 | +} |
| 60 | +tick := 0 |
| 61 | + |
| 62 | +fileReader, err := os.Open("RequestStream.js") |
| 63 | +if err != nil { |
| 64 | +panic(fmt.Errorf("json feeder invalid request stream file: %s", err)) |
| 65 | +} |
| 66 | + |
| 67 | +jsonRequestStream := json.NewDecoder(fileReader) |
| 68 | +_, err = jsonRequestStream.Token() // Read open bracket |
| 69 | +if err != nil { |
| 70 | +panic(err) |
| 71 | +} |
| 72 | + |
| 73 | +for { |
| 74 | +select { |
| 75 | +case newTickChan, more := <-ticksChannel: // Send all the requests for this tickChan |
| 76 | +if more { |
| 77 | +tickCpusAcc := 0 |
| 78 | +tickMemoryAcc := 0 |
| 79 | + |
| 80 | +// Generate the requests from the json request stream. |
| 81 | +for jsonRequestStream.More() && (j.ratioSystemResources(tickCpusAcc, tickMemoryAcc) < 0.05) { |
| 82 | +var reqJson Request |
| 83 | +err := jsonRequestStream.Decode(&reqJson) |
| 84 | +if err != nil { |
| 85 | +panic(err) |
| 86 | +} |
| 87 | + |
| 88 | +requestID := strconv.FormatInt(reqJson.JobID, 10) |
| 89 | +reqResources := j.generateRequestResources(reqJson.CPUs, reqJson.Memory) |
| 90 | +tickCpusAcc += reqResources.CPUs |
| 91 | +tickMemoryAcc += reqResources.Memory |
| 92 | + |
| 93 | +if reqJson.EventType == 1 && !j.requestExists(requestID) { // Deploy container request. |
| 94 | + |
| 95 | +newTickChan <- func(nodeIndex int, injectedNode *node.Node, currentTime time.Duration) { |
| 96 | +requestCtx := context.WithValue(context.Background(), types.RequestIDKey, requestID) |
| 97 | +j.collector.CreateRunRequest(nodeIndex, requestID, reqResources, currentTime) |
| 98 | +contStatus, err := injectedNode.SubmitContainers( |
| 99 | +requestCtx, |
| 100 | +[]types.ContainerConfig{{ |
| 101 | +ImageKey: util.RandomName(), |
| 102 | +Name: util.RandomName(), |
| 103 | +PortMappings: caravela.EmptyPortMappings(), |
| 104 | +Args: caravela.EmptyContainerArgs(), |
| 105 | +Resources: reqResources, |
| 106 | +GroupPolicy: types.SpreadGroupPolicy, |
| 107 | +}}) |
| 108 | +if err == nil { |
| 109 | +j.reqInjectionNode.Store(contStatus[0].ContainerID, injectedNode) |
| 110 | +j.collector.RunRequestSucceeded() |
| 111 | +} |
| 112 | +j.collector.ArchiveRunRequest(requestID) |
| 113 | +} |
| 114 | + |
| 115 | +} else if (reqJson.EventType == 2 || reqJson.EventType == 3 || reqJson.EventType == 4 || |
| 116 | +reqJson.EventType == 5 || reqJson.EventType == 6) && j.requestExists(requestID) { // Stop container request. |
| 117 | + |
| 118 | +j.reqInjectionNode.Range(func(key, value interface{}) bool { |
| 119 | +containerID, _ := key.(string) |
| 120 | +injectionNode, _ := value.(*node.Node) |
| 121 | +newTickChan <- func(_ int, _ *node.Node, _ time.Duration) { |
| 122 | +err := injectionNode.StopContainers(context.Background(), []string{containerID}) |
| 123 | +if err != nil { |
| 124 | +//util.Log.Infof(util.LogTag(logRandFeederTag)+"Stop container FAILED, err: %s", err) |
| 125 | +} |
| 126 | +j.reqInjectionNode.Delete(containerID) |
| 127 | +} |
| 128 | +return false |
| 129 | +}) |
| 130 | + |
| 131 | +} |
| 132 | + |
| 133 | +} |
| 134 | + |
| 135 | +if !jsonRequestStream.More() { |
| 136 | +fileReader.Close() // Close the request file. |
| 137 | +close(newTickChan) // No more user requests for this tick. |
| 138 | +return |
| 139 | +} |
| 140 | + |
| 141 | +close(newTickChan) // No more user requests for this tick. |
| 142 | +} else { // Simulator closed ticks channel. |
| 143 | +fileReader.Close() // Close the request file. |
| 144 | +return // Stop feeding engine |
| 145 | +} |
| 146 | +} |
| 147 | +tick++ |
| 148 | +} |
| 149 | +} |
| 150 | + |
| 151 | +// generateRequestResources ... |
| 152 | +func (j *jsonFeeder) generateRequestResources(normalizedCpus, normalizedMemory float64) types.Resources { |
| 153 | +cpuClasses := make([]int, len(j.caravelaConfigs.ResourcesPartitions().CPUClasses)) |
| 154 | +maxCpus := 0 |
| 155 | +maxMemory := 0 |
| 156 | + |
| 157 | +cpuClassAcc := 0 |
| 158 | +for i, cpuClass := range j.caravelaConfigs.ResourcesPartitions().CPUClasses { |
| 159 | +cpuClasses[i] = cpuClass.Percentage + cpuClassAcc |
| 160 | +cpuClassAcc += cpuClass.Percentage |
| 161 | +for _, cpus := range cpuClass.CPUCores { |
| 162 | +if cpus.Value > maxCpus { |
| 163 | +maxCpus = cpus.Value |
| 164 | +} |
| 165 | +for _, memory := range cpus.Memory { |
| 166 | +if memory.Value > maxMemory { |
| 167 | +maxMemory = memory.Value |
| 168 | +} |
| 169 | +} |
| 170 | +} |
| 171 | +} |
| 172 | + |
| 173 | +chosenCpuClass := 0 |
| 174 | +randInt := j.randomGenerator.Intn(101) |
| 175 | +for i, cpuClass := range cpuClasses { |
| 176 | +if randInt <= cpuClass { |
| 177 | +chosenCpuClass = i |
| 178 | +} |
| 179 | +} |
| 180 | + |
| 181 | +return types.Resources{ |
| 182 | +CPUClass: types.CPUClass(chosenCpuClass), |
| 183 | +CPUs: int(math.Ceil(normalizedCpus * float64(maxCpus))), |
| 184 | +Memory: int(math.Ceil(normalizedMemory * float64(maxMemory))), |
| 185 | +} |
| 186 | +} |
| 187 | + |
| 188 | +// ratioSystemResources returns the ratio of resources given considered the system's total resources. |
| 189 | +func (j *jsonFeeder) ratioSystemResources(cpus, memory int) float64 { |
| 190 | +cpusRatio := float64(cpus) / float64(j.systemTotalResources.CPUs) |
| 191 | +memoryRatio := float64(memory) / float64(j.systemTotalResources.Memory) |
| 192 | +return (cpusRatio + memoryRatio) / 2 |
| 193 | +} |
| 194 | + |
| 195 | +// requestExists verifies if a request was already injected in the request stream. |
| 196 | +func (j *jsonFeeder) requestExists(requestID string) bool { |
| 197 | +_, ok := j.reqInjectionNode.Load(requestID) |
| 198 | +return ok |
| 199 | +} |
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