percentiles

info/container_test.go

@@ -289,7 +289,7 @@ func TestContainerStatsCopy(t *testing.T) {
 	stats.Cpu.Load = shadowStats.Cpu.Load + 1
 	stats.Memory.Usage = shadowStats.Memory.Usage + 1
 	if reflect.DeepEqual(stats, shadowStats) {
-		t.Errorf("Copy() did not deeply copied the object")
+		t.Errorf("Copy() did not deeply copy the object")
 	}
 	stats = shadowStats.Copy(stats)
 	if !reflect.DeepEqual(stats, shadowStats) {

storage/influxdb/influxdb.go

@@ -33,6 +33,37 @@ type influxdbStorage struct {
 	windowLen   time.Duration
 }
 
+const (
+	colTimestamp          string = "timestamp"
+	colMachineName        string = "machine"
+	colContainerName      string = "container_name"
+	colCpuCumulativeUsage string = "cpu_cumulative_usage"
+	// Cumulative Cpu Usage in system mode
+	colCpuCumulativeUsageSystem string = "cpu_cumulative_usage_system"
+	// Cumulative Cpu Usage in user mode
+	colCpuCumulativeUsageUser string = "cpu_cumulative_usage_user"
+	// Memory Usage
+	colMemoryUsage string = "memory_usage"
+	// Working set size
+	colMemoryWorkingSet string = "memory_working_set"
+	// container page fault
+	colMemoryContainerPgfault string = "memory_container_pgfault"
+	// container major page fault
+	colMemoryContainerPgmajfault string = "memory_container_pgmajfault"
+	// hierarchical page fault
+	colMemoryHierarchicalPgfault string = "memory_hierarchical_pgfault"
+	// hierarchical major page fault
+	colMemoryHierarchicalPgmajfault string = "memory_hierarchical_pgmajfault"
+	// Cumulative per core usage
+	colPerCoreCumulativeUsagePrefix string = "per_core_cumulative_usage_core_"
+	// Optional: sample duration. Unit: Nanosecond.
+	colSampleDuration string = "sample_duration"
+	// Optional: Instant cpu usage
+	colCpuInstantUsage string = "cpu_instant_usage"
+	// Optional: Instant per core usage
+	colPerCoreInstantUsagePrefix string = "per_core_instant_usage_core_"
+)
+
 func (self *influxdbStorage) containerStatsToValues(
 	ref info.ContainerReference,
 	stats *info.ContainerStats,
@@ -46,8 +77,8 @@ func (self *influxdbStorage) containerStatsToValues(
 	columns = append(columns, "machine")
 	values = append(values, self.machineName)
 
-	// Container path
-	columns = append(columns, "container_path")
+	// Container name
+	columns = append(columns, "container_name")
 	values = append(values, ref.Name)
 
 	// Cumulative Cpu Usage
@@ -220,33 +251,29 @@ func (self *influxdbStorage) valuesToContainerSample(columns []string, values []
 	var err error
 	for i, col := range columns {
 		v := values[i]
-		switch col {
-		case "timestamp":
+		switch {
+		case col == "timestamp":
 			if str, ok := v.(string); ok {
 				sample.Timestamp, err = time.Parse(time.RFC3339Nano, str)
 			}
-		case "machine":
+		case col == "machine":
 			if v.(string) != self.machineName {
 				return nil, fmt.Errorf("different machine")
 			}
 		// Memory Usage
-		case "memory_usage":
+		case col == "memory_usage":
 			sample.Memory.Usage, err = convertToUint64(v)
 		// sample duration. Unit: Nanosecond.
-		case "sample_duration":
+		case col == "sample_duration":
 			if v == nil {
 				// this record does not have sample_duration, so it's the first stats.
 				return nil, nil
 			}
 			sample.Duration, err = time.ParseDuration(v.(string))
-			// Instant cpu usage
-		case "cpu_instant_usage":
+		// Instant cpu usage
+		case col == "cpu_instant_usage":
 			sample.Cpu.Usage, err = convertToUint64(v)
-
-		default:
-			if !strings.HasPrefix(col, "per_core_instant_usage_core_") {
-				continue
-			}
+		case strings.HasPrefix(col, "per_core_instant_usage_core_"):
 			idxStr := col[len("per_core_instant_usage_core_"):]
 			idx, err := strconv.Atoi(idxStr)
 			if err != nil {
@@ -290,7 +317,7 @@ func (self *influxdbStorage) AddStats(ref info.ContainerReference, stats *info.C
 func (self *influxdbStorage) RecentStats(containerName string, numStats int) ([]*info.ContainerStats, error) {
 	// TODO(dengnan): select only columns that we need
 	// TODO(dengnan): escape containerName
-	query := fmt.Sprintf("select * from %v where container_path='%v' and machine='%v'", self.tableName, containerName, self.machineName)
+	query := fmt.Sprintf("select * from %v where container_name='%v' and machine='%v'", self.tableName, containerName, self.machineName)
 	if numStats > 0 {
 		query = fmt.Sprintf("%v limit %v", query, numStats)
 	}
@@ -317,7 +344,7 @@ func (self *influxdbStorage) RecentStats(containerName string, numStats int) ([]
 func (self *influxdbStorage) Samples(containerName string, numSamples int) ([]*info.ContainerStatsSample, error) {
 	// TODO(dengnan): select only columns that we need
 	// TODO(dengnan): escape containerName
-	query := fmt.Sprintf("select * from %v where container_path='%v' and machine='%v'", self.tableName, containerName, self.machineName)
+	query := fmt.Sprintf("select * from %v where container_name='%v' and machine='%v'", self.tableName, containerName, self.machineName)
 	if numSamples > 0 {
 		query = fmt.Sprintf("%v limit %v", query, numSamples)
 	}
@@ -352,24 +379,87 @@ func (self *influxdbStorage) Percentiles(
 	memUsagePercentiles []int,
 ) (*info.ContainerStatsPercentiles, error) {
 	// TODO(dengnan): Implement it
-	return nil, nil
+	selectedCol := make([]string, 0, len(cpuUsagePercentiles)+len(memUsagePercentiles)+1)
+
+	selectedCol = append(selectedCol, "max(memory_usage)")
+	for _, p := range cpuUsagePercentiles {
+		selectedCol = append(selectedCol, fmt.Sprintf("percentile(cpu_instant_usage, %v)", p))
+	}
+	for _, p := range memUsagePercentiles {
+		selectedCol = append(selectedCol, fmt.Sprintf("percentile(memory_usage, %v)", p))
+	}
+
+	query := fmt.Sprintf("select %v from %v where container_name='%v' and machine='%v' and time > now() - %v",
+		strings.Join(selectedCol, ","),
+		self.tableName,
+		containerName,
+		self.machineName,
+		fmt.Sprintf("%vs", self.windowLen.Seconds()),
+	)
+	series, err := self.client.Query(query)
+	if err != nil {
+		return nil, err
+	}
+	if len(series) != 1 {
+		return nil, nil
+	}
+	if len(series[0].Points) == 0 {
+		return nil, nil
+	}
+
+	point := series[0].Points[0]
+
+	ret := new(info.ContainerStatsPercentiles)
+	ret.MaxMemoryUsage, err = convertToUint64(point[1])
+	if err != nil {
+		return nil, fmt.Errorf("invalid max memory usage: %v", err)
+	}
+	retrievedCpuPercentiles := point[2:]
+	for i, p := range cpuUsagePercentiles {
+		v, err := convertToUint64(retrievedCpuPercentiles[i])
+		if err != nil {
+			return nil, fmt.Errorf("invalid cpu usage: %v", err)
+		}
+		ret.CpuUsagePercentiles = append(
+			ret.CpuUsagePercentiles,
+			info.Percentile{
+				Percentage: p,
+				Value:      v,
+			},
+		)
+	}
+	retrievedMemoryPercentiles := point[2+len(cpuUsagePercentiles):]
+	for i, p := range memUsagePercentiles {
+		v, err := convertToUint64(retrievedMemoryPercentiles[i])
+		if err != nil {
+			return nil, fmt.Errorf("invalid memory usage: %v", err)
+		}
+		ret.MemoryUsagePercentiles = append(
+			ret.MemoryUsagePercentiles,
+			info.Percentile{
+				Percentage: p,
+				Value:      v,
+			},
+		)
+	}
+	return ret, nil
 }
 
 // machineName: A unique identifier to identify the host that current cAdvisor
 // instance is running on.
-// hostname: The host which runs influxdb.
+// influxdbHost: The host which runs influxdb.
 // percentilesDuration: Time window which will be considered when calls Percentiles()
 func New(machineName,
 	tablename,
 	database,
 	username,
 	password,
-	hostname string,
+	influxdbHost string,
 	isSecure bool,
 	percentilesDuration time.Duration,
 ) (storage.StorageDriver, error) {
 	config := &influxdb.ClientConfig{
-		Host:     hostname,
+		Host:     influxdbHost,
 		Username: username,
 		Password: password,
 		Database: database,

storage/influxdb/influxdb_test.go

@@ -106,3 +106,19 @@ func TestNoRecentStats(t *testing.T) {
 func TestNoSamples(t *testing.T) {
 	runStorageTest(test.StorageDriverTestNoSamples, t)
 }
+
+func TestPercentiles(t *testing.T) {
+	runStorageTest(test.StorageDriverTestPercentiles, t)
+}
+
+func TestMaxMemoryUsage(t *testing.T) {
+	runStorageTest(test.StorageDriverTestMaxMemoryUsage, t)
+}
+
+func TestPercentilesWithoutSample(t *testing.T) {
+	runStorageTest(test.StorageDriverTestPercentilesWithoutSample, t)
+}
+
+func TestPercentilesWithoutStats(t *testing.T) {
+	runStorageTest(test.StorageDriverTestPercentilesWithoutStats, t)
+}