provide Clair notification handler

update the timestamp in DB, when handling the notification

make/common/db/registry.sql

@@ -194,6 +194,14 @@ create table img_scan_overview (
  PRIMARY KEY(image_digest)
  );
 
+create table clair_vuln_timestamp (
+id int NOT NULL AUTO_INCREMENT, 
+namespace varchar(128) NOT NULL,
+last_update timestamp NOT NULL,
+PRIMARY KEY(id),
+UNIQUE(namespace)
+);
+
 create table properties (
  k varchar(64) NOT NULL,
  v varchar(128) NOT NULL,

make/common/db/registry_sqlite.sql

@@ -150,7 +150,7 @@ create table replication_target (
  );
 
 create table replication_job (
- id INTEGER PRIMARY KEY,
+ id INTEGER PRIMARY KEY, 
  status varchar(64) NOT NULL,
  policy_id int NOT NULL,
  repository varchar(256) NOT NULL,
@@ -187,6 +187,13 @@ create table img_scan_overview (
 CREATE INDEX policy ON replication_job (policy_id);
 CREATE INDEX poid_uptime ON replication_job (policy_id, update_time);
  
+create table clair_vuln_timestamp (
+id INTEGER PRIMARY KEY, 
+namespace varchar(128) NOT NULL,
+last_update timestamp NOT NULL,
+UNIQUE(namespace)
+);
+
 create table properties (
  k varchar(64) NOT NULL,
  v varchar(128) NOT NULL,

make/common/templates/clair/config.yaml

@@ -16,8 +16,10 @@ clair:
     # Deadline before an API request will respond with a 503
     timeout: 300s
   updater:
-    interval: 2h
+    interval: 1h
 
   notifier:
     attempts: 3
     renotifyinterval: 2h
+    http:
+      endpoint: http://ui/service/notifications/clair

src/common/dao/clair.go

@@ -0,0 +1,54 @@
+// copyright (c) 2017 vmware, inc. all rights reserved.
+//
+// licensed under the apache license, version 2.0 (the "license");
+// you may not use this file except in compliance with the license.
+// you may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/license-2.0
+//
+// unless required by applicable law or agreed to in writing, software
+// distributed under the license is distributed on an "as is" basis,
+// without warranties or conditions of any kind, either express or implied.
+// see the license for the specific language governing permissions and
+// limitations under the license.
+
+package dao
+
+import (
+	"github.com/vmware/harbor/src/common/models"
+
+	"fmt"
+	"time"
+)
+
+//SetClairVulnTimestamp update the last_update of a namespace. If there's no record for this namespace, one will be created.
+func SetClairVulnTimestamp(namespace string, timestamp time.Time) error {
+	o := GetOrmer()
+	rec := &models.ClairVulnTimestamp{
+		Namespace:  namespace,
+		LastUpdate: timestamp,
+	}
+	created, _, err := o.ReadOrCreate(rec, "Namespace")
+	if err != nil {
+		return err
+	}
+	if !created {
+		rec.LastUpdate = timestamp
+		n, err := o.Update(rec)
+		if err != nil {
+			return err
+		}
+		if n == 0 {
+			return fmt.Errorf("No record is updated, record: %v", *rec)
+		}
+	}
+	return nil
+}
+
+//ListClairVulnTimestamps return a list of all records in vuln timestamp table.
+func ListClairVulnTimestamps() ([]*models.ClairVulnTimestamp, error) {
+	var res []*models.ClairVulnTimestamp
+	o := GetOrmer()
+	_, err := o.QueryTable(models.ClairVulnTimestampTable).All(&res)
+	return res, err
+}

src/common/dao/dao_test.go

@@ -1733,3 +1733,33 @@ func TestImgScanOverview(t *testing.T) {
 	assert.Equal(int(models.SevMedium), res.Sev)
 	assert.Equal(2, res.CompOverview.Summary[0].Count)
 }
+
+func TestVulnTimestamp(t *testing.T) {
+
+	assert := assert.New(t)
+	err := ClearTable(models.ClairVulnTimestampTable)
+	assert.Nil(err)
+	ns := "ubuntu:14"
+	res, err := ListClairVulnTimestamps()
+	assert.Nil(err)
+	assert.Equal(0, len(res))
+	err = SetClairVulnTimestamp(ns, time.Now())
+	assert.Nil(err)
+	res, err = ListClairVulnTimestamps()
+	assert.Nil(err)
+	assert.Equal(1, len(res))
+	assert.Equal(ns, res[0].Namespace)
+	old := time.Now()
+	t.Logf("Sleep 3 seconds")
+	time.Sleep(3 * time.Second)
+	err = SetClairVulnTimestamp(ns, time.Now())
+	assert.Nil(err)
+	res, err = ListClairVulnTimestamps()
+	assert.Nil(err)
+	assert.Equal(1, len(res))
+
+	d := res[0].LastUpdate.Sub(old)
+	if d < 2*time.Second {
+		t.Errorf("Delta should be larger than 2 seconds! old: %v, lastupdate: %v", old, res[0].LastUpdate)
+	}
+}

src/common/models/base.go

@@ -28,5 +28,6 @@ func init() {
 		new(AccessLog),
 		new(ScanJob),
 		new(RepoRecord),
-		new(ImgScanOverview))
+		new(ImgScanOverview),
+		new(ClairVulnTimestamp))
 }

src/common/models/clair.go

@@ -14,6 +14,25 @@
 
 package models
 
+import (
+	"time"
+)
+
+// ClairVulnTimestampTable is the name of the table that tracks the timestamp of vulnerability in Clair.
+const ClairVulnTimestampTable = "clair_vuln_timestamp"
+
+// ClairVulnTimestamp represents a record in DB that tracks the timestamp of vulnerability in Clair.
+type ClairVulnTimestamp struct {
+	ID         int64     `orm:"pk;auto;column(id)" json:"-"`
+	Namespace  string    `orm:"column(namespace)" json:"namespace"`
+	LastUpdate time.Time `orm:"column(last_update)" json:"last_update"`
+}
+
+//TableName is required by beego to map struct to table.
+func (ct *ClairVulnTimestamp) TableName() string {
+	return ClairVulnTimestampTable
+}
+
 //ClairLayer ...
 type ClairLayer struct {
 	Name           string            `json:"Name,omitempty"`
@@ -57,3 +76,34 @@ type ClairLayerEnvelope struct {
 	Layer *ClairLayer `json:"Layer,omitempty"`
 	Error *ClairError `json:"Error,omitempty"`
 }
+
+//ClairNotification ...
+type ClairNotification struct {
+	Name     string                        `json:"Name,omitempty"`
+	Created  string                        `json:"Created,omitempty"`
+	Notified string                        `json:"Notified,omitempty"`
+	Deleted  string                        `json:"Deleted,omitempty"`
+	Limit    int                           `json:"Limit,omitempty"`
+	Page     string                        `json:"Page,omitempty"`
+	NextPage string                        `json:"NextPage,omitempty"`
+	Old      *ClairVulnerabilityWithLayers `json:"Old,omitempty"`
+	New      *ClairVulnerabilityWithLayers `json:"New,omitempty"`
+}
+
+//ClairNotificationEnvelope ...
+type ClairNotificationEnvelope struct {
+	Notification *ClairNotification `json:"Notification,omitempty"`
+	Error        *ClairError        `json:"Error,omitempty"`
+}
+
+//ClairVulnerabilityWithLayers ...
+type ClairVulnerabilityWithLayers struct {
+	Vulnerability                         *ClairVulnerability     `json:"Vulnerability,omitempty"`
+	OrderedLayersIntroducingVulnerability []ClairOrderedLayerName `json:"OrderedLayersIntroducingVulnerability,omitempty"`
+}
+
+//ClairOrderedLayerName ...
+type ClairOrderedLayerName struct {
+	Index     int    `json:"Index"`
+	LayerName string `json:"LayerName"`
+}

src/common/utils/clair/client.go

@@ -104,3 +104,55 @@ func (c *Client) GetResult(layerName string) (*models.ClairLayerEnvelope, error)
 	}
 	return &res, nil
 }
+
+// GetNotification calls Clair's API to get details of notification
+func (c *Client) GetNotification(id string) (*models.ClairNotification, error) {
+	req, err := http.NewRequest("GET", c.endpoint+"/v1/notifications/"+id+"?limit=2", nil)
+	if err != nil {
+		return nil, err
+	}
+	resp, err := c.client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	b, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("Unexpected status code: %d, text: %s", resp.StatusCode, string(b))
+	}
+	var ne models.ClairNotificationEnvelope
+	err = json.Unmarshal(b, &ne)
+	if err != nil {
+		return nil, err
+	}
+	if ne.Error != nil {
+		return nil, fmt.Errorf("Clair error: %s", ne.Error.Message)
+	}
+	log.Debugf("Retrived notification %s from Clair.", id)
+	return ne.Notification, nil
+}
+
+// DeleteNotification deletes a notification record from Clair
+func (c *Client) DeleteNotification(id string) error {
+	req, err := http.NewRequest("DELETE", c.endpoint+"/v1/notifications/"+id, nil)
+	if err != nil {
+		return err
+	}
+	resp, err := c.client.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	b, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return err
+	}
+	if resp.StatusCode != http.StatusOK {
+		return fmt.Errorf("Unexpected status code: %d, text: %s", resp.StatusCode, string(b))
+	}
+	log.Debugf("Deleted notification %s from Clair.", id)
+	return nil
+}

src/ui/router.go

@@ -17,7 +17,8 @@ package main
 import (
 	"github.com/vmware/harbor/src/ui/api"
 	"github.com/vmware/harbor/src/ui/controllers"
-	"github.com/vmware/harbor/src/ui/service"
+	"github.com/vmware/harbor/src/ui/service/notifications/clair"
+	"github.com/vmware/harbor/src/ui/service/notifications/registry"
 	"github.com/vmware/harbor/src/ui/service/token"
 
 	"github.com/astaxie/beego"
@@ -109,7 +110,8 @@ func initRouters() {
 	beego.Router("/api/email/ping", &api.EmailAPI{}, "post:Ping")
 
 	//external service that hosted on harbor process:
-	beego.Router("/service/notifications", &service.NotificationHandler{})
+	beego.Router("/service/notifications", &registry.NotificationHandler{})
+	beego.Router("/service/notifications/clair", &clair.Handler{}, "post:Handle")
 	beego.Router("/service/token", &token.Handler{})
 
 	beego.Router("/registryproxy/*", &controllers.RegistryProxy{}, "*:Handle")

src/ui/service/notifications/clair/handler.go

@@ -0,0 +1,109 @@
+// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package clair
+
+import (
+	"encoding/json"
+	"sync"
+	"time"
+
+	"github.com/vmware/harbor/src/common/dao"
+	"github.com/vmware/harbor/src/common/models"
+	"github.com/vmware/harbor/src/common/utils/clair"
+	"github.com/vmware/harbor/src/common/utils/log"
+	"github.com/vmware/harbor/src/ui/api"
+	"github.com/vmware/harbor/src/ui/config"
+)
+
+const (
+	rescanInterval = 15 * time.Minute
+)
+
+type timer struct {
+	sync.Mutex
+	next time.Time
+}
+
+// returns true to indicate it should reshedule the "rescan" action.
+func (t *timer) needReschedule() bool {
+	t.Lock()
+	defer t.Unlock()
+	if time.Now().Before(t.next) {
+		return false
+	}
+	t.next = time.Now().Add(rescanInterval)
+	return true
+}
+
+var (
+	rescanTimer = timer{}
+	clairClient = clair.NewClient(config.ClairEndpoint(), nil)
+)
+
+// Handler handles reqeust on /service/notifications/clair/, which listens to clair's notifications.
+// When there's unexpected error it will silently fail without removing the notification such that it will be triggered again.
+type Handler struct {
+	api.BaseController
+}
+
+// Handle ...
+func (h *Handler) Handle() {
+	var ne models.ClairNotificationEnvelope
+	if err := json.Unmarshal(h.Ctx.Input.CopyBody(1<<32), &ne); err != nil {
+		log.Errorf("Failed to decode the request: %v", err)
+		return
+	}
+	log.Debugf("Received notification from Clair, name: %s", ne.Notification.Name)
+	notification, err := clairClient.GetNotification(ne.Notification.Name)
+	if err != nil {
+		log.Errorf("Failed to get notification details from Clair, name: %s, err: %v", ne.Notification.Name, err)
+		return
+	}
+	ns := make(map[string]bool)
+	if old := notification.Old; old != nil {
+		if vuln := old.Vulnerability; vuln != nil {
+			log.Debugf("old vulnerability namespace: %s", vuln.NamespaceName)
+			ns[vuln.NamespaceName] = true
+		}
+	}
+	if new := notification.New; new != nil {
+		if vuln := new.Vulnerability; vuln != nil {
+			log.Debugf("new vulnerability namespace: %s", vuln.NamespaceName)
+			ns[vuln.NamespaceName] = true
+		}
+	}
+	for k, v := range ns {
+		if v {
+			if err := dao.SetClairVulnTimestamp(k, time.Now()); err == nil {
+				log.Debugf("Updated the timestamp for namespaces: %s", k)
+			} else {
+				log.Warningf("Failed to update the timestamp for namespaces: %s, error: %v", k, err)
+			}
+		}
+	}
+	if rescanTimer.needReschedule() {
+		go func() {
+			<-time.After(rescanInterval)
+			log.Debugf("TODO: rescan or resfresh scan_overview!")
+		}()
+	} else {
+		log.Debugf("There is a rescan scheduled already, skip.")
+	}
+	if err := clairClient.DeleteNotification(ne.Notification.Name); err != nil {
+		log.Warningf("Failed to remove notification from Clair, name: %s", ne.Notification.Name)
+	} else {
+		log.Debugf("Removed notification from Clair, name: %s", ne.Notification.Name)
+	}
+}

src/ui/service/notifications/registry/handler.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package service
+package registry
 
 import (
 	"encoding/json"