fix (sysadvisor): pap - fixes of defects identified in integration validation

pkg/agent/sysadvisor/plugin/poweraware/advisor/action/strategy/strategy.go

@@ -55,11 +55,6 @@ func (p ruleBasedPowerStrategy) RecommendAction(actualWatt int,
 		return action.PowerAction{Op: spec.InternalOpNoop, Arg: 0}
 	}
 
-	if ttl <= time.Minute*2 {
-		// whatever valid alert, power capping should do in short of 2 minutes
-		return action.PowerAction{Op: spec.InternalOpFreqCap, Arg: desiredWatt}
-	}
-
 	op := internalOp
 	if spec.InternalOpAuto == op {
 		op = p.autoAction(actualWatt, desiredWatt, ttl)

pkg/agent/sysadvisor/plugin/poweraware/advisor/action/strategy/strategy_test.go

@@ -114,14 +114,31 @@ func Test_ruleBasedPowerStrategy_RecommendAction(t *testing.T) {
 				actualWatt:  99,
 				desiredWatt: 88,
 				alert:       spec.PowerAlertP1,
-				internalOp:  spec.InternalOpThrottle,
+				internalOp:  spec.InternalOpAuto,
 				ttl:         time.Second * 30,
 			},
 			want: action.PowerAction{
 				Op:  spec.InternalOpFreqCap,
 				Arg: 88,
 			},
 		},
+		{
+			name: "approaching deadline no freq capping is indicated otherwise only",
+			fields: fields{
+				coefficient: exponentialDecay{},
+			},
+			args: args{
+				actualWatt:  99,
+				desiredWatt: 88,
+				alert:       spec.PowerAlertP1,
+				internalOp:  spec.InternalOpEvict,
+				ttl:         time.Second * 30,
+			},
+			want: action.PowerAction{
+				Op:  spec.InternalOpEvict,
+				Arg: 12,
+			},
+		},
 		{
 			name:   "having a lot of time usually leads to evict a very little portion",
 			fields: fields{coefficient: exponentialDecay{b: math.E / 2}},

pkg/agent/sysadvisor/plugin/poweraware/capper/server/service.go

@@ -21,6 +21,7 @@ import (
 	"fmt"
 	"net"
 	"os"
+	"path/filepath"
 	"sync"
 
 	"github.com/pkg/errors"
@@ -204,6 +205,10 @@ func newPowerCapServiceSuite(conf *config.Configuration, emitter metrics.MetricE
 		return nil, nil, errors.Wrap(err, "failed to clean up the residue file")
 	}
 
+	if err := os.MkdirAll(filepath.Dir(socketPath), 0o755); err != nil {
+		return nil, nil, errors.Wrap(err, "failed to create folders to unix sock file")
+	}
+
 	sock, err := net.Listen("unix", socketPath)
 	if err != nil {
 		return nil, nil, fmt.Errorf("%v listen %s failed: %v", powerCapSvc.Name(), socketPath, err)

pkg/agent/sysadvisor/plugin/poweraware/evictor/server/evictor_service.go

@@ -26,7 +26,6 @@ import (
 
 	"github.com/kubewharf/katalyst-api/pkg/plugins/registration"
 	"github.com/kubewharf/katalyst-api/pkg/plugins/skeleton"
-
 	pluginapi "github.com/kubewharf/katalyst-api/pkg/protocol/evictionplugin/v1alpha1"
 
 	"github.com/kubewharf/katalyst-core/pkg/agent/sysadvisor/plugin/poweraware/evictor"
@@ -43,24 +42,47 @@ const (
 var errPowerPressureEvictionPluginUnavailable = errors.New("power pressure eviction plugin is unavailable")
 
 type powerPressureEvictServer struct {
+	plugin  *powerPressureEvictPlugin
+	service *skeleton.PluginRegistrationWrapper
+}
+
+func (p *powerPressureEvictServer) Init() error {
+	return p.plugin.Init()
+}
+
+func (p *powerPressureEvictServer) Evict(ctx context.Context, pods []*v1.Pod) error {
+	return p.plugin.Evict(ctx, pods)
+}
+
+func (p *powerPressureEvictServer) Start() error {
+	if err := p.service.Start(); err != nil {
+		return errors.Wrap(err, "failed to start power pressure eviction plugin server")
+	}
+	return nil
+}
+
+func (p *powerPressureEvictServer) Stop() error {
+	return p.service.Stop()
+}
+
+type powerPressureEvictPlugin struct {
 	mutex   sync.RWMutex
 	started bool
 	evicts  map[types.UID]*v1.Pod
-	service *skeleton.PluginRegistrationWrapper
 }
 
-func (p *powerPressureEvictServer) Init() error {
+func (p *powerPressureEvictPlugin) Init() error {
 	return nil
 }
 
 // reset method clears all pending eviction requests not fetched by remote client
-func (p *powerPressureEvictServer) reset(ctx context.Context) {
+func (p *powerPressureEvictPlugin) reset(ctx context.Context) {
 	p.evicts = make(map[types.UID]*v1.Pod)
 }
 
 // Evict method puts request to evict pods in the pool; it will be sent out to plugin client via the eviction protocol
 // the real eviction will be done by the (remote) eviction manager where the plugin client is registered with
-func (p *powerPressureEvictServer) Evict(ctx context.Context, pods []*v1.Pod) error {
+func (p *powerPressureEvictPlugin) Evict(ctx context.Context, pods []*v1.Pod) error {
 	p.mutex.Lock()
 	defer p.mutex.Unlock()
 
@@ -80,7 +102,7 @@ func (p *powerPressureEvictServer) Evict(ctx context.Context, pods []*v1.Pod) er
 	return nil
 }
 
-func (p *powerPressureEvictServer) evictPod(ctx context.Context, pod *v1.Pod) error {
+func (p *powerPressureEvictPlugin) evictPod(ctx context.Context, pod *v1.Pod) error {
 	if pod == nil {
 		return errors.New("unexpected nil pod")
 	}
@@ -89,56 +111,43 @@ func (p *powerPressureEvictServer) evictPod(ctx context.Context, pod *v1.Pod) er
 	return nil
 }
 
-func (p *powerPressureEvictServer) Name() string {
+func (p *powerPressureEvictPlugin) Name() string {
 	return EvictionPluginNameNodePowerPressure
 }
 
-func (p *powerPressureEvictServer) Start() error {
+func (p *powerPressureEvictPlugin) Start() error {
 	p.mutex.Lock()
 	defer p.mutex.Unlock()
 
-	if p.started {
-		general.InfofV(6, "pap: power pressure eviction server already started")
-		return nil
-	}
-
-	if err := p.service.Start(); err != nil {
-		return errors.Wrap(err, "failed to start power pressure eviction plugin server")
-	}
 	p.started = true
 	return nil
 }
 
-func (p *powerPressureEvictServer) Stop() error {
+func (p *powerPressureEvictPlugin) Stop() error {
 	p.mutex.Lock()
 	defer p.mutex.Unlock()
 
-	if !p.started {
-		general.InfofV(6, "pap: power pressure eviction server already stopped")
-		return nil
-	}
-
-	p.started = false
-	return p.service.Stop()
+	p.reset(context.Background())
+	return nil
 }
 
-func (p *powerPressureEvictServer) GetToken(ctx context.Context, empty *pluginapi.Empty) (*pluginapi.GetTokenResponse, error) {
+func (p *powerPressureEvictPlugin) GetToken(ctx context.Context, empty *pluginapi.Empty) (*pluginapi.GetTokenResponse, error) {
 	return &pluginapi.GetTokenResponse{Token: ""}, nil
 }
 
-func (p *powerPressureEvictServer) ThresholdMet(ctx context.Context, empty *pluginapi.Empty) (*pluginapi.ThresholdMetResponse, error) {
+func (p *powerPressureEvictPlugin) ThresholdMet(ctx context.Context, empty *pluginapi.Empty) (*pluginapi.ThresholdMetResponse, error) {
 	return &pluginapi.ThresholdMetResponse{}, nil
 }
 
-func (p *powerPressureEvictServer) GetTopEvictionPods(ctx context.Context, request *pluginapi.GetTopEvictionPodsRequest) (*pluginapi.GetTopEvictionPodsResponse, error) {
+func (p *powerPressureEvictPlugin) GetTopEvictionPods(ctx context.Context, request *pluginapi.GetTopEvictionPodsRequest) (*pluginapi.GetTopEvictionPodsResponse, error) {
 	return &pluginapi.GetTopEvictionPodsResponse{}, nil
 }
 
 // GetEvictPods is called from a remote evict plugin client to get evict candidates
 // In the current eviction manager framework, plugins are expected to implement either GetEvictPods or GetTopEvictionPods + ThresholdMet;
 // the former allows the plugin to explicitly specify force and soft eviction candidates, which suits this plugin's use case.
 // Adequate to implement only GetEvictPods and simply let GetTopEvictionPods and ThresholdMet return default responses.
-func (p *powerPressureEvictServer) GetEvictPods(ctx context.Context, request *pluginapi.GetEvictPodsRequest) (*pluginapi.GetEvictPodsResponse, error) {
+func (p *powerPressureEvictPlugin) GetEvictPods(ctx context.Context, request *pluginapi.GetEvictPodsRequest) (*pluginapi.GetEvictPodsResponse, error) {
 	general.InfofV(6, "pap: evict: GetEvictPods request with %d active pods", len(request.GetActivePods()))
 	activePods := map[types.UID]struct{}{}
 	for _, pod := range request.GetActivePods() {
@@ -168,14 +177,14 @@ func (p *powerPressureEvictServer) GetEvictPods(ctx context.Context, request *pl
 	return &pluginapi.GetEvictPodsResponse{EvictPods: evictPods}, nil
 }
 
-func newPowerPressureEvictServer() *powerPressureEvictServer {
-	return &powerPressureEvictServer{
+func newPowerPressureEvictPlugin() *powerPressureEvictPlugin {
+	return &powerPressureEvictPlugin{
 		evicts: make(map[types.UID]*v1.Pod),
 	}
 }
 
-func NewPowerPressureEvictionPlugin(conf *config.Configuration, emitter metrics.MetricEmitter) (evictor.PodEvictor, error) {
-	plugin := newPowerPressureEvictServer()
+func NewPowerPressureEvictionServer(conf *config.Configuration, emitter metrics.MetricEmitter) (evictor.PodEvictor, error) {
+	plugin := newPowerPressureEvictPlugin()
 	regWrapper, err := skeleton.NewRegistrationPluginWrapper(plugin,
 		[]string{conf.PluginRegistrationDir}, // unix socket dirs
 		func(key string, value int64) {
@@ -188,6 +197,9 @@ func NewPowerPressureEvictionPlugin(conf *config.Configuration, emitter metrics.
 		return nil, errors.Wrap(err, "failed to register pap power pressure eviction plugin")
 	}
 
-	plugin.service = regWrapper
-	return plugin, nil
+	server := &powerPressureEvictServer{
+		plugin:  plugin,
+		service: regWrapper,
+	}
+	return server, nil
 }

pkg/agent/sysadvisor/plugin/poweraware/evictor/server/evictor_service_test.go

@@ -20,6 +20,7 @@ import (
 	"context"
 	"fmt"
 	"net"
+	"os"
 	"sort"
 	"testing"
 
@@ -34,13 +35,15 @@ import (
 	evictionv1apha1 "github.com/kubewharf/katalyst-api/pkg/protocol/evictionplugin/v1alpha1"
 
 	"github.com/kubewharf/katalyst-core/pkg/agent/sysadvisor/plugin/poweraware/evictor"
+	"github.com/kubewharf/katalyst-core/pkg/config"
+	metricspool "github.com/kubewharf/katalyst-core/pkg/metrics/metrics-pool"
 )
 
 func setupGrpcServer(ctx context.Context) (evictor.PodEvictor, evictionv1apha1.EvictionPluginClient, func()) {
 	buffer := 101024 * 1024
 	lis := bufconn.Listen(buffer)
 
-	server := &powerPressureEvictServer{}
+	server := &powerPressureEvictPlugin{}
 	baseServer := grpc.NewServer()
 	evictionv1apha1.RegisterEvictionPluginServer(baseServer, server)
 	server.started = true
@@ -178,7 +181,7 @@ func Test_powerPressureEvictPluginServer_GetEvictPods(t *testing.T) {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
 			t.Parallel()
-			p := &powerPressureEvictServer{
+			p := &powerPressureEvictPlugin{
 				evicts: tt.fields.evicts,
 			}
 			got, err := p.GetEvictPods(tt.args.ctx, tt.args.request)
@@ -194,3 +197,23 @@ func Test_powerPressureEvictPluginServer_GetEvictPods(t *testing.T) {
 		})
 	}
 }
+
+func Test_powerPressureEvictServer_Start_Stop(t *testing.T) {
+	t.Parallel()
+	tmpDir, err := os.MkdirTemp("", "*")
+	assert.NoError(t, err)
+
+	dummyConf := config.NewConfiguration()
+	dummyConf.PluginRegistrationDir = tmpDir
+	dummyEmitter := metricspool.DummyMetricsEmitterPool.GetDefaultMetricsEmitter(metricspool.DummyMetricsEmitterPool{})
+	plugin, err := NewPowerPressureEvictionServer(dummyConf, dummyEmitter)
+	assert.NoError(t, err)
+
+	err = plugin.Start()
+	assert.NoError(t, err)
+
+	err = plugin.Stop()
+	assert.NoError(t, err)
+
+	_ = os.RemoveAll(tmpDir)
+}

pkg/agent/sysadvisor/plugin/poweraware/power_aware.go

@@ -80,7 +80,7 @@ func NewPowerAwarePlugin(
 	if conf.DisablePowerPressureEvict {
 		podEvictor = evictor.NewNoopPodEvictor()
 	} else {
-		if podEvictor, err = evictserver.NewPowerPressureEvictionPlugin(conf, emitter); err != nil {
+		if podEvictor, err = evictserver.NewPowerPressureEvictionServer(conf, emitter); err != nil {
 			return nil, errors.Wrap(err, "pap: failed to create power aware plugin")
 		}
 	}