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controller.go
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/
controller.go
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///////////////////////////////////////////////////////////////////////
// Copyright (c) 2017 VMware, Inc. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
///////////////////////////////////////////////////////////////////////
package imagemanager
import (
"context"
"reflect"
"time"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
"github.com/vmware/dispatch/pkg/controller"
entitystore "github.com/vmware/dispatch/pkg/entity-store"
"github.com/vmware/dispatch/pkg/trace"
)
// ControllerConfig defines the image manager controller configuration
type ControllerConfig struct {
ResyncPeriod time.Duration
ZookeeperLocation string
}
type baseImageEntityHandler struct {
Store entitystore.EntityStore
Builder *BaseImageBuilder
}
func (h *baseImageEntityHandler) Type() reflect.Type {
return reflect.TypeOf(&BaseImage{})
}
func (h *baseImageEntityHandler) Add(ctx context.Context, obj entitystore.Entity) (err error) {
span, ctx := trace.Trace(ctx, "")
defer span.Finish()
bi := obj.(*BaseImage)
defer func() { h.Store.UpdateWithError(ctx, bi, err) }()
bi.Status = entitystore.StatusREADY
if err = h.Builder.baseImagePull(ctx, bi); err != nil {
span.LogKV("error", err)
}
log.Debugf("Updating last pull time for %s/%s", bi.OrganizationID, bi.Name)
bi.LastPullTime = time.Now()
return
}
func (h *baseImageEntityHandler) Update(ctx context.Context, obj entitystore.Entity) error {
span, ctx := trace.Trace(ctx, "")
defer span.Finish()
return h.Add(ctx, obj)
}
func (h *baseImageEntityHandler) Delete(ctx context.Context, obj entitystore.Entity) error {
span, ctx := trace.Trace(ctx, "")
defer span.Finish()
bi := obj.(*BaseImage)
err := h.Builder.baseImageDelete(ctx, bi)
if err != nil {
span.LogKV("error", err)
log.Error(err)
}
var deleted BaseImage
err = h.Store.Delete(ctx, bi.GetOrganizationID(), bi.GetName(), &deleted)
if err != nil {
return errors.Wrapf(err, "Error deleting base image entity %s/%s", bi.GetOrganizationID(), bi.GetName())
}
return nil
}
func (h *baseImageEntityHandler) Sync(ctx context.Context, resyncPeriod time.Duration) ([]entitystore.Entity, error) {
span, ctx := trace.Trace(ctx, "")
defer span.Finish()
return h.Builder.baseImageStatus(ctx)
}
func (h *baseImageEntityHandler) Error(ctx context.Context, obj entitystore.Entity) error {
span, ctx := trace.Trace(ctx, "")
defer span.Finish()
_, err := h.Store.Update(ctx, obj.GetRevision(), obj)
return err
}
type imageEntityHandler struct {
Store entitystore.EntityStore
Builder *ImageBuilder
}
func (h *imageEntityHandler) Type() reflect.Type {
return reflect.TypeOf(&Image{})
}
func (h *imageEntityHandler) Add(ctx context.Context, obj entitystore.Entity) (err error) {
span, ctx := trace.Trace(ctx, "")
defer span.Finish()
i := obj.(*Image)
var bi BaseImage
err = h.Store.Get(ctx, i.OrganizationID, i.BaseImageName, entitystore.Options{}, &bi)
if err != nil {
span.LogKV("error", err)
log.Error(err)
}
i.SetStatus(entitystore.StatusCREATING)
_, err = h.Store.Update(ctx, i.GetRevision(), i)
if err != nil {
span.LogKV("error", err)
log.Error(err)
return
}
defer func() { h.Store.UpdateWithError(ctx, i, err) }()
if i.Status == entitystore.StatusMISSING {
err = h.Builder.imagePull(ctx, i)
} else {
err = h.Builder.imageCreate(ctx, i, &bi)
}
if err != nil {
span.LogKV("error", err)
log.Error(err)
}
return
}
func (h *imageEntityHandler) Update(ctx context.Context, obj entitystore.Entity) error {
span, ctx := trace.Trace(ctx, "")
defer span.Finish()
i := obj.(*Image)
if err := h.Builder.imageDelete(ctx, i); err != nil {
log.Errorf("error deleting docker image %s: %+v", i.DockerURL, err)
}
return h.Add(ctx, obj)
}
func (h *imageEntityHandler) Delete(ctx context.Context, obj entitystore.Entity) error {
span, ctx := trace.Trace(ctx, "")
defer span.Finish()
i := obj.(*Image)
err := h.Builder.imageDelete(ctx, i)
if err != nil {
span.LogKV("error", err)
log.Error(err)
}
var deleted Image
err = h.Store.Delete(ctx, i.GetOrganizationID(), i.GetName(), &deleted)
if err != nil {
return errors.Wrapf(err, "error deleting image entity %s/%s", i.GetOrganizationID(), i.GetName())
}
return nil
}
func (h *imageEntityHandler) Sync(ctx context.Context, resyncPeriod time.Duration) ([]entitystore.Entity, error) {
span, ctx := trace.Trace(ctx, "")
defer span.Finish()
return h.Builder.imageStatus(ctx)
}
func (h *imageEntityHandler) Error(ctx context.Context, obj entitystore.Entity) error {
span, ctx := trace.Trace(ctx, "")
defer span.Finish()
_, err := h.Store.Update(ctx, obj.GetRevision(), obj)
return err
}
// NewController creates a new image manager controller
func NewController(config *ControllerConfig, store entitystore.EntityStore, baseImageBuilder *BaseImageBuilder, imageBuilder *ImageBuilder) controller.Controller {
c := controller.NewController(controller.Options{
ResyncPeriod: config.ResyncPeriod,
Workers: 10, // want more functions concurrently? add more workers // TODO configure workers
ServiceName: "images",
ZookeeperLocation: config.ZookeeperLocation,
})
c.AddEntityHandler(&baseImageEntityHandler{Store: store, Builder: baseImageBuilder})
c.AddEntityHandler(&imageEntityHandler{Store: store, Builder: imageBuilder})
return c
}