Merge pull request #10803 from wy65701436/gc-oci

Revise the GC job flow
This commit is contained in:
Wang Yan 2020-02-25 02:11:27 +08:00 committed by GitHub
commit 61ea8d514b
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GPG Key ID: 4AEE18F83AFDEB23
22 changed files with 290 additions and 82 deletions

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@ -5676,6 +5676,9 @@ definitions:
job_kind:
type: string
description: the job kind of gc job.
job_parameters:
type: string
description: the job parameters of gc job.
schedule:
$ref: '#/definitions/AdminJobScheduleObj'
job_status:
@ -5695,6 +5698,9 @@ definitions:
properties:
schedule:
$ref: '#/definitions/AdminJobScheduleObj'
parameters:
type: string
description: The parameters of admin job
AdminJobScheduleObj:
type: object
properties:

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@ -1,3 +1,4 @@
ALTER TABLE admin_job ADD COLUMN job_parameters varchar(255) Default '';
ALTER TABLE artifact ADD COLUMN repository_id int;
ALTER TABLE artifact ADD COLUMN media_type varchar(255);
ALTER TABLE artifact ADD COLUMN manifest_media_type varchar(255);

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@ -28,10 +28,10 @@ func AddAdminJob(job *models.AdminJob) (int64, error) {
if len(job.Status) == 0 {
job.Status = models.JobPending
}
sql := "insert into admin_job (job_name, job_kind, status, job_uuid, cron_str, creation_time, update_time) values (?, ?, ?, ?, ?, ?, ?) RETURNING id"
sql := "insert into admin_job (job_name, job_parameters, job_kind, status, job_uuid, cron_str, creation_time, update_time) values (?, ?, ?, ?, ?, ?, ?, ?) RETURNING id"
var id int64
now := time.Now()
err := o.Raw(sql, job.Name, job.Kind, job.Status, job.UUID, job.Cron, now, now).QueryRow(&id)
err := o.Raw(sql, job.Name, job.Parameters, job.Kind, job.Status, job.UUID, job.Cron, now, now).QueryRow(&id)
if err != nil {
return 0, err
}

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@ -44,8 +44,9 @@ func (suite *AdminJobSuite) SetupSuite() {
}
job0 := &models.AdminJob{
Name: "GC",
Kind: "testKind",
Name: "GC",
Kind: "testKind",
Parameters: "{test:test}",
}
suite.ids = make([]int64, 0)
@ -77,6 +78,7 @@ func (suite *AdminJobSuite) TestAdminJobBase() {
require.Nil(suite.T(), err)
suite.Equal(job1.ID, suite.job0.ID)
suite.Equal(job1.Name, suite.job0.Name)
suite.Equal(job1.Parameters, suite.job0.Parameters)
// set uuid
err = SetAdminJobUUID(suite.job0.ID, "f5ef34f4cb3588d663176132")

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@ -29,6 +29,7 @@ type AdminJob struct {
ID int64 `orm:"pk;auto;column(id)" json:"id"`
Name string `orm:"column(job_name)" json:"job_name"`
Kind string `orm:"column(job_kind)" json:"job_kind"`
Parameters string `orm:"column(job_parameters)" json:"job_parameters"`
Cron string `orm:"column(cron_str)" json:"cron_str"`
Status string `orm:"column(status)" json:"job_status"`
UUID string `orm:"column(job_uuid)" json:"-"`

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@ -133,7 +133,7 @@ func (aj *AJAPI) list(name string) {
// getSchedule gets admin job schedule ...
func (aj *AJAPI) getSchedule(name string) {
adminJobSchedule := models.AdminJobSchedule{}
result := models.AdminJobRep{}
jobs, err := dao.GetAdminJobs(&common_models.AdminJobQuery{
Name: name,
@ -154,10 +154,11 @@ func (aj *AJAPI) getSchedule(name string) {
aj.SendInternalServerError(fmt.Errorf("failed to convert admin job response: %v", err))
return
}
adminJobSchedule.Schedule = adminJobRep.Schedule
result.Schedule = adminJobRep.Schedule
result.Parameters = adminJobRep.Parameters
}
aj.Data["json"] = adminJobSchedule
aj.Data["json"] = result
aj.ServeJSON()
}
@ -285,9 +286,10 @@ func (aj *AJAPI) submit(ajr *models.AdminJobReq) {
}
id, err := dao.AddAdminJob(&common_models.AdminJob{
Name: ajr.Name,
Kind: ajr.JobKind(),
Cron: ajr.CronString(),
Name: ajr.Name,
Kind: ajr.JobKind(),
Cron: ajr.CronString(),
Parameters: ajr.ParamString(),
})
if err != nil {
aj.SendInternalServerError(err)
@ -345,6 +347,7 @@ func convertToAdminJobRep(job *common_models.AdminJob) (models.AdminJobRep, erro
Name: job.Name,
Kind: job.Kind,
Status: job.Status,
Parameters: job.Parameters,
CreationTime: job.CreationTime,
UpdateTime: job.UpdateTime,
}

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@ -73,6 +73,7 @@ type AdminJobRep struct {
ID int64 `json:"id"`
Name string `json:"job_name"`
Kind string `json:"job_kind"`
Parameters string `json:"job_parameters"`
Status string `json:"job_status"`
UUID string `json:"-"`
Deleted bool `json:"deleted"`
@ -151,6 +152,16 @@ func (ar *AdminJobReq) CronString() string {
return string(str)
}
// ParamString ...
func (ar *AdminJobReq) ParamString() string {
str, err := json.Marshal(ar.Parameters)
if err != nil {
log.Debugf("failed to marshal json error, %v", err)
return ""
}
return string(str)
}
// ConvertSchedule converts different kinds of cron string into one standard for UI to show.
// in the latest design, it uses {"type":"Daily","cron":"0 0 0 * * *"} as the cron item.
// As for supporting migration from older version, it needs to convert {"parameter":{"daily_time":0},"type":"daily"}

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@ -138,6 +138,19 @@ func TestCronString(t *testing.T) {
assert.True(t, strings.EqualFold(cronStr, "{\"type\":\"Daily\",\"Cron\":\"20 3 0 * * *\"}"))
}
func TestParamString(t *testing.T) {
adminJobPara := make(map[string]interface{})
adminJobPara["key1"] = "value1"
adminJobPara["key2"] = true
adminJobPara["key3"] = 88
adminjob := &AdminJobReq{
Parameters: adminJobPara,
}
paramStr := adminjob.ParamString()
assert.True(t, strings.EqualFold(paramStr, "{\"key1\":\"value1\",\"key2\":true,\"key3\":88}"))
}
func TestConvertSchedule(t *testing.T) {
schedule1 := "{\"type\":\"Daily\",\"cron\":\"20 3 0 * * *\"}"
converted1, err1 := ConvertSchedule(schedule1)

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@ -48,12 +48,18 @@ func (gc *GCAPI) Prepare() {
// "schedule": {
// "type": "Daily",
// "cron": "0 0 0 * * *"
// },
// "parameters": {
// "delete_untagged": true
// }
// }
// create a manual trigger for GC
// {
// "schedule": {
// "type": "Manual"
// },
// "parameters": {
// "delete_untagged": true
// }
// }
func (gc *GCAPI) Post() {
@ -64,9 +70,7 @@ func (gc *GCAPI) Post() {
return
}
ajr.Name = common_job.ImageGC
ajr.Parameters = map[string]interface{}{
"redis_url_reg": os.Getenv("_REDIS_URL_REG"),
}
ajr.Parameters["redis_url_reg"] = os.Getenv("_REDIS_URL_REG")
gc.submit(&ajr)
gc.Redirect(http.StatusCreated, strconv.FormatInt(ajr.ID, 10))
}
@ -77,6 +81,9 @@ func (gc *GCAPI) Post() {
// "schedule": {
// "type": "None",
// "cron": ""
// },
// "parameters": {
// "delete_untagged": true
// }
// }
func (gc *GCAPI) Put() {
@ -87,9 +94,7 @@ func (gc *GCAPI) Put() {
return
}
ajr.Name = common_job.ImageGC
ajr.Parameters = map[string]interface{}{
"redis_url_reg": os.Getenv("_REDIS_URL_REG"),
}
ajr.Parameters["redis_url_reg"] = os.Getenv("_REDIS_URL_REG")
gc.updateSchedule(ajr)
}

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@ -7,10 +7,11 @@ import (
"github.com/stretchr/testify/assert"
)
var adminJob001 apilib.AdminJobReq
func TestGCPost(t *testing.T) {
adminJob001 := apilib.AdminJobReq{
Parameters: map[string]interface{}{"delete_untagged": false},
}
assert := assert.New(t)
apiTest := newHarborAPI()

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@ -17,6 +17,8 @@ package impl
import (
"context"
"errors"
o "github.com/astaxie/beego/orm"
"github.com/goharbor/harbor/src/internal/orm"
"github.com/goharbor/harbor/src/jobservice/job"
"github.com/goharbor/harbor/src/jobservice/logger"
)
@ -49,7 +51,8 @@ func (dc *DefaultContext) Build(t job.Tracker) (job.Context, error) {
}
jContext := &DefaultContext{
sysContext: dc.sysContext,
// TODO support DB transaction
sysContext: orm.NewContext(dc.sysContext, o.NewOrm()),
tracker: t,
properties: make(map[string]interface{}),
}

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@ -16,19 +16,18 @@ package gc
import (
"fmt"
"github.com/goharbor/harbor/src/api/artifact"
"github.com/goharbor/harbor/src/pkg/artifactrash"
"github.com/goharbor/harbor/src/pkg/q"
"os"
"strconv"
"time"
"github.com/garyburd/redigo/redis"
"github.com/goharbor/harbor/src/common"
"github.com/goharbor/harbor/src/common/config"
"github.com/goharbor/harbor/src/common/dao"
common_quota "github.com/goharbor/harbor/src/common/quota"
"github.com/goharbor/harbor/src/common/registryctl"
"github.com/goharbor/harbor/src/jobservice/job"
"github.com/goharbor/harbor/src/jobservice/logger"
"github.com/goharbor/harbor/src/pkg/types"
"github.com/goharbor/harbor/src/registryctl/client"
)
@ -43,11 +42,14 @@ const (
// GarbageCollector is the struct to run registry's garbage collection
type GarbageCollector struct {
artCtl artifact.Controller
artrashMgr artifactrash.Manager
registryCtlClient client.Client
logger logger.Interface
cfgMgr *config.CfgManager
CoreURL string
redisURL string
deleteUntagged bool
}
// MaxFails implements the interface in job/Interface
@ -66,6 +68,22 @@ func (gc *GarbageCollector) Validate(params job.Parameters) error {
}
// Run implements the interface in job/Interface
// The workflow of GC is:
// 1, set harbor to readonly
// 2, select the candidate artifacts from Harbor DB.
// 3, call registry API(--delete-untagged=false) to delete manifest bases on the results of #2
// 4, clean keys of redis DB of registry, clean artifact trash and untagged from DB.
// 5, roll back readonly.
// More details:
// 1, why disable delete untagged when to call registry API
// Generally because that we introduce Harbor tag in v2.0, it's in database but no corresponding data in registry.
// Also one failure case example:
// there are two parts for putting an manifest in Harbor: write database and write storage, but they're not in a transaction,
// which leads to the data mismatching in parallel pushing images with same tag but different digest. The valid artifact in
// harbor DB could be a untagged one in the storage. If we enable the delete untagged, the valid data could be removed from the storage.
// 2, what to be cleaned
// > the deleted artifact, bases on table of artifact_trash and artifact
// > the untagged artifact(optional), bases on table of artifact.
func (gc *GarbageCollector) Run(ctx job.Context, params job.Parameters) error {
if err := gc.init(ctx, params); err != nil {
return err
@ -80,11 +98,10 @@ func (gc *GarbageCollector) Run(ctx job.Context, params job.Parameters) error {
}
defer gc.setReadOnly(readOnlyCur)
}
if err := gc.registryCtlClient.Health(); err != nil {
gc.logger.Errorf("failed to start gc as registry controller is unreachable: %v", err)
return err
}
gc.logger.Infof("start to run gc in job.")
if err := gc.deleteCandidates(ctx); err != nil {
gc.logger.Errorf("failed to delete GC candidates in gc job, with error: %v", err)
}
gcr, err := gc.registryCtlClient.StartGC()
if err != nil {
gc.logger.Errorf("failed to get gc result: %v", err)
@ -93,9 +110,6 @@ func (gc *GarbageCollector) Run(ctx job.Context, params job.Parameters) error {
if err := gc.cleanCache(); err != nil {
return err
}
if err := gc.ensureQuota(); err != nil {
gc.logger.Warningf("failed to align quota data in gc job, with error: %v", err)
}
gc.logger.Infof("GC results: status: %t, message: %s, start: %s, end: %s.", gcr.Status, gcr.Msg, gcr.StartTime, gcr.EndTime)
gc.logger.Infof("success to run gc in job.")
return nil
@ -105,6 +119,13 @@ func (gc *GarbageCollector) init(ctx job.Context, params job.Parameters) error {
registryctl.Init()
gc.registryCtlClient = registryctl.RegistryCtlClient
gc.logger = ctx.GetLogger()
gc.artCtl = artifact.Ctl
gc.artrashMgr = artifactrash.NewManager()
if err := gc.registryCtlClient.Health(); err != nil {
gc.logger.Errorf("failed to start gc as registry controller is unreachable: %v", err)
return err
}
errTpl := "failed to get required property: %s"
if v, ok := ctx.Get(common.CoreURL); ok && len(v.(string)) > 0 {
@ -116,11 +137,17 @@ func (gc *GarbageCollector) init(ctx job.Context, params job.Parameters) error {
configURL := gc.CoreURL + common.CoreConfigPath
gc.cfgMgr = config.NewRESTCfgManager(configURL, secret)
gc.redisURL = params["redis_url_reg"].(string)
// default is to delete the untagged artifact
if params["delete_untagged"] == "" {
gc.deleteUntagged = true
} else {
gc.deleteUntagged = params["delete_untagged"].(bool)
}
return nil
}
func (gc *GarbageCollector) getReadOnly() (bool, error) {
if err := gc.cfgMgr.Load(); err != nil {
return false, err
}
@ -138,7 +165,6 @@ func (gc *GarbageCollector) setReadOnly(switcher bool) error {
// cleanCache is to clean the registry cache for GC.
// To do this is because the issue https://github.com/docker/distribution/issues/2094
func (gc *GarbageCollector) cleanCache() error {
con, err := redis.DialURL(
gc.redisURL,
redis.DialConnectTimeout(dialConnectionTimeout),
@ -169,60 +195,47 @@ func (gc *GarbageCollector) cleanCache() error {
return nil
}
func delKeys(con redis.Conn, pattern string) error {
iter := 0
keys := make([]string, 0)
for {
arr, err := redis.Values(con.Do("SCAN", iter, "MATCH", pattern))
if err != nil {
return fmt.Errorf("error retrieving '%s' keys", pattern)
// deleteCandidates deletes the two parts of artifact from harbor DB
// 1, required part, the artifacts were removed from Harbor.
// 2, optional part, the untagged artifacts.
func (gc *GarbageCollector) deleteCandidates(ctx job.Context) error {
// default is to clean trash
flushTrash := true
defer func() {
if flushTrash {
if err := gc.artrashMgr.Flush(ctx.SystemContext()); err != nil {
gc.logger.Errorf("failed to flush artifact trash")
}
}
iter, err = redis.Int(arr[0], nil)
if err != nil {
return fmt.Errorf("unexpected type for Int, got type %T", err)
}
k, err := redis.Strings(arr[1], nil)
if err != nil {
return fmt.Errorf("converts an array command reply to a []string %v", err)
}
keys = append(keys, k...)
}()
if iter == 0 {
break
// handle the optional ones, and the artifact controller will move them into trash.
if gc.deleteUntagged {
untagged, err := gc.artCtl.List(ctx.SystemContext(), &q.Query{
Keywords: map[string]interface{}{
"Tags": "nil",
},
}, nil)
if err != nil {
return err
}
for _, art := range untagged {
if err := gc.artCtl.Delete(ctx.SystemContext(), art.ID); err != nil {
// the failure ones can be GCed by the next execution
gc.logger.Errorf("failed to delete untagged:%d artifact in DB, error, %v", art.ID, err)
}
}
}
for _, key := range keys {
_, err := con.Do("DEL", key)
if err != nil {
return fmt.Errorf("failed to clean registry cache %v", err)
}
}
return nil
}
func (gc *GarbageCollector) ensureQuota() error {
projects, err := dao.GetProjects(nil)
// handle the trash
required, err := gc.artrashMgr.Filter(ctx.SystemContext())
if err != nil {
return err
return nil
}
for _, project := range projects {
pSize, err := dao.CountSizeOfProject(project.ProjectID)
if err != nil {
gc.logger.Warningf("error happen on counting size of project:%d by artifact, error:%v, just skip it.", project.ProjectID, err)
continue
}
quotaMgr, err := common_quota.NewManager("project", strconv.FormatInt(project.ProjectID, 10))
if err != nil {
gc.logger.Errorf("Error occurred when to new quota manager %v, just skip it.", err)
continue
}
if err := quotaMgr.SetResourceUsage(types.ResourceStorage, pSize); err != nil {
gc.logger.Errorf("cannot ensure quota for the project: %d, err: %v, just skip it.", project.ProjectID, err)
continue
}
if err := dao.RemoveUntaggedBlobs(project.ProjectID); err != nil {
gc.logger.Errorf("cannot delete untagged blobs of project: %d, err: %v, just skip it.", project.ProjectID, err)
continue
for _, art := range required {
if err := deleteManifest(art.RepositoryName, art.Digest); err != nil {
flushTrash = false
return fmt.Errorf("failed to delete manifest, %s:%s with error: %v", art.RepositoryName, art.Digest, err)
}
}
return nil

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@ -0,0 +1,21 @@
package gc
import (
"github.com/stretchr/testify/assert"
"testing"
)
func TestMaxFails(t *testing.T) {
rep := &GarbageCollector{}
assert.Equal(t, uint(1), rep.MaxFails())
}
func TestShouldRetry(t *testing.T) {
rep := &GarbageCollector{}
assert.False(t, rep.ShouldRetry())
}
func TestValidate(t *testing.T) {
rep := &GarbageCollector{}
assert.Nil(t, rep.Validate(nil))
}

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@ -0,0 +1,56 @@
package gc
import (
"fmt"
"github.com/garyburd/redigo/redis"
"github.com/goharbor/harbor/src/pkg/registry"
)
// delKeys ...
func delKeys(con redis.Conn, pattern string) error {
iter := 0
keys := make([]string, 0)
for {
arr, err := redis.Values(con.Do("SCAN", iter, "MATCH", pattern))
if err != nil {
return fmt.Errorf("error retrieving '%s' keys", pattern)
}
iter, err = redis.Int(arr[0], nil)
if err != nil {
return fmt.Errorf("unexpected type for Int, got type %T", err)
}
k, err := redis.Strings(arr[1], nil)
if err != nil {
return fmt.Errorf("converts an array command reply to a []string %v", err)
}
keys = append(keys, k...)
if iter == 0 {
break
}
}
for _, key := range keys {
_, err := con.Do("DEL", key)
if err != nil {
return fmt.Errorf("failed to clean registry cache %v", err)
}
}
return nil
}
// deleteManifest calls the registry API to remove manifest
func deleteManifest(repository, digest string) error {
exist, _, err := registry.Cli.ManifestExist(repository, digest)
if err != nil {
return err
}
// it could be happened at remove manifest success but fail to delete harbor DB.
// when the GC job executes again, the manifest should not exist.
if !exist {
return nil
}
if err := registry.Cli.DeleteManifest(repository, digest); err != nil {
return err
}
return nil
}

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@ -15,6 +15,7 @@ package runner
import (
"context"
common_dao "github.com/goharbor/harbor/src/common/dao"
"os"
"sync"
"testing"
@ -52,6 +53,7 @@ type RedisRunnerTestSuite struct {
// TestRedisRunnerTestSuite is entry of go test
func TestRedisRunnerTestSuite(t *testing.T) {
common_dao.PrepareTestForPostgresSQL()
suite.Run(t, new(RedisRunnerTestSuite))
}

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@ -17,6 +17,7 @@ import (
"context"
"errors"
"fmt"
common_dao "github.com/goharbor/harbor/src/common/dao"
"github.com/goharbor/harbor/src/jobservice/common/utils"
"github.com/goharbor/harbor/src/jobservice/env"
"github.com/goharbor/harbor/src/jobservice/job"
@ -50,6 +51,7 @@ type CWorkerTestSuite struct {
func (suite *CWorkerTestSuite) SetupSuite() {
suite.namespace = tests.GiveMeTestNamespace()
suite.pool = tests.GiveMeRedisPool()
common_dao.PrepareTestForPostgresSQL()
// Append node ID
vCtx := context.WithValue(context.Background(), utils.NodeID, utils.GenerateNodeID())

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@ -17,6 +17,8 @@ type DAO interface {
Delete(ctx context.Context, id int64) (err error)
// Filter lists the artifact that needs to be cleaned
Filter(ctx context.Context) (arts []model.ArtifactTrash, err error)
// Flush clean the trash table
Flush(ctx context.Context) (err error)
}
// New returns an instance of the default DAO
@ -76,3 +78,20 @@ func (d *dao) Filter(ctx context.Context) (arts []model.ArtifactTrash, err error
}
return deletedAfs, nil
}
// Flush ...
func (d *dao) Flush(ctx context.Context) (err error) {
ormer, err := orm.FromContext(ctx)
if err != nil {
return err
}
sql := `DELETE * FROM artifact_trash`
if err != nil {
return err
}
_, err = ormer.Raw(sql).Exec()
if err != nil {
return err
}
return nil
}

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@ -89,3 +89,27 @@ func (d *daoTestSuite) TestFilter() {
d.Require().NotNil(err)
d.Require().Equal(afs[0].Digest, "1234")
}
func (d *daoTestSuite) TestFlush() {
_, err := d.dao.Create(d.ctx, &model.ArtifactTrash{
ManifestMediaType: v1.MediaTypeImageManifest,
RepositoryName: "hello-world",
Digest: "abcd",
})
d.Require().Nil(err)
_, err = d.dao.Create(d.ctx, &model.ArtifactTrash{
ManifestMediaType: v1.MediaTypeImageManifest,
RepositoryName: "hello-world2",
Digest: "efgh",
})
d.Require().Nil(err)
_, err = d.dao.Create(d.ctx, &model.ArtifactTrash{
ManifestMediaType: v1.MediaTypeImageManifest,
RepositoryName: "hello-world3",
Digest: "ijkl",
})
d.Require().Nil(err)
err = d.dao.Flush(d.ctx)
d.Require().Nil(err)
}

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@ -33,6 +33,8 @@ type Manager interface {
Delete(ctx context.Context, id int64) (err error)
// Filter ...
Filter(ctx context.Context) (arts []model.ArtifactTrash, err error)
// Flush clean the trash table
Flush(ctx context.Context) (err error)
}
// NewManager returns an instance of the default manager
@ -57,3 +59,7 @@ func (m *manager) Delete(ctx context.Context, id int64) error {
func (m *manager) Filter(ctx context.Context) (arts []model.ArtifactTrash, err error) {
return m.dao.Filter(ctx)
}
func (m *manager) Flush(ctx context.Context) (err error) {
return m.dao.Flush(ctx)
}

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@ -24,6 +24,10 @@ func (f *fakeDao) Filter(ctx context.Context) (arts []model.ArtifactTrash, err e
args := f.Called()
return args.Get(0).([]model.ArtifactTrash), args.Error(1)
}
func (f *fakeDao) Flush(ctx context.Context) (err error) {
args := f.Called()
return args.Error(0)
}
type managerTestSuite struct {
suite.Suite
@ -69,3 +73,10 @@ func (m *managerTestSuite) TestFilter() {
m.Require().Nil(err)
m.Equal(len(arts), 1)
}
func (m *managerTestSuite) TestFlush() {
m.dao.On("Flush", mock.Anything).Return(nil)
err := m.mgr.Flush(nil)
m.Require().Nil(err)
m.dao.AssertExpectations(m.T())
}

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@ -24,9 +24,11 @@ package apilib
// AdminJobReq holds request information for admin job
type AdminJobReq struct {
Schedule *ScheduleParam `json:"schedule,omitempty"`
Status string `json:"status,omitempty"`
ID int64 `json:"id,omitempty"`
Schedule *ScheduleParam `json:"schedule,omitempty"`
Name string `json:"name"`
Status string `json:"status,omitempty"`
ID int64 `json:"id,omitempty"`
Parameters map[string]interface{} `json:"parameters"`
}
// ScheduleParam ...

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@ -45,3 +45,9 @@ func (f *FakeManager) Filter(ctx context.Context) (arts []model.ArtifactTrash, e
args := f.Called()
return args.Get(0).([]model.ArtifactTrash), args.Error(1)
}
// Flush ...
func (f *FakeManager) Flush(ctx context.Context) (err error) {
args := f.Called()
return args.Error(0)
}