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worker.go
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worker.go
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package worker
import (
"errors"
"fmt"
"io"
"os"
"strings"
"time"
"code.cloudfoundry.org/clock"
"code.cloudfoundry.org/lager"
"github.com/concourse/atc"
"github.com/concourse/atc/dbng"
)
var ErrUnsupportedResourceType = errors.New("unsupported resource type")
var ErrIncompatiblePlatform = errors.New("incompatible platform")
var ErrMismatchedTags = errors.New("mismatched tags")
var ErrNoVolumeManager = errors.New("worker does not support volume management")
var ErrTeamMismatch = errors.New("mismatched team")
var ErrNotImplemented = errors.New("Not implemented")
type MalformedMetadataError struct {
UnmarshalError error
}
func (err MalformedMetadataError) Error() string {
return fmt.Sprintf("malformed image metadata: %s", err.UnmarshalError)
}
const ephemeralPropertyName = "concourse:ephemeral"
const volumePropertyName = "concourse:volumes"
const volumeMountsPropertyName = "concourse:volume-mounts"
const userPropertyName = "user"
const RawRootFSScheme = "raw"
const ImageMetadataFile = "metadata.json"
//go:generate counterfeiter . Worker
type Worker interface {
Client
ActiveContainers() int
Description() string
Name() string
ResourceTypes() []atc.WorkerResourceType
Tags() atc.Tags
Uptime() time.Duration
IsOwnedByTeam() bool
}
type gardenWorker struct {
containerProviderFactory ContainerProviderFactory
volumeClient VolumeClient
lockDB LockDB
provider WorkerProvider
clock clock.Clock
activeContainers int
resourceTypes []atc.WorkerResourceType
platform string
tags atc.Tags
teamID int
name string
startTime int64
}
func NewGardenWorker(
containerProviderFactory ContainerProviderFactory,
volumeClient VolumeClient,
lockDB LockDB,
provider WorkerProvider,
clock clock.Clock,
activeContainers int,
resourceTypes []atc.WorkerResourceType,
platform string,
tags atc.Tags,
teamID int,
name string,
startTime int64,
) Worker {
return &gardenWorker{
containerProviderFactory: containerProviderFactory,
volumeClient: volumeClient,
lockDB: lockDB,
provider: provider,
clock: clock,
activeContainers: activeContainers,
resourceTypes: resourceTypes,
platform: platform,
tags: tags,
teamID: teamID,
name: name,
startTime: startTime,
}
}
func (worker *gardenWorker) FindResourceTypeByPath(path string) (atc.WorkerResourceType, bool) {
for _, rt := range worker.resourceTypes {
if path == rt.Image {
return rt, true
}
}
return atc.WorkerResourceType{}, false
}
func (worker *gardenWorker) CreateVolumeForResourceCache(logger lager.Logger, volumeSpec VolumeSpec, resourceCache *dbng.UsedResourceCache) (Volume, error) {
return worker.volumeClient.CreateVolumeForResourceCache(logger, volumeSpec, resourceCache)
}
func (worker *gardenWorker) FindInitializedVolumeForResourceCache(logger lager.Logger, resourceCache *dbng.UsedResourceCache) (Volume, bool, error) {
return worker.volumeClient.FindInitializedVolumeForResourceCache(logger, resourceCache)
}
func (worker *gardenWorker) LookupVolume(logger lager.Logger, handle string) (Volume, bool, error) {
return worker.volumeClient.LookupVolume(logger, handle)
}
func (worker *gardenWorker) FindOrCreateBuildContainer(
logger lager.Logger,
cancel <-chan os.Signal,
delegate ImageFetchingDelegate,
buildID int,
planID atc.PlanID,
metadata dbng.ContainerMetadata,
spec ContainerSpec,
resourceTypes atc.VersionedResourceTypes,
) (Container, error) {
containerProvider := worker.containerProviderFactory.ContainerProviderFor(worker)
return containerProvider.FindOrCreateBuildContainer(
logger,
cancel,
delegate,
buildID,
planID,
metadata,
spec,
resourceTypes,
)
}
func (worker *gardenWorker) CreateResourceGetContainer(
logger lager.Logger,
resourceUser dbng.ResourceUser,
cancel <-chan os.Signal,
delegate ImageFetchingDelegate,
metadata dbng.ContainerMetadata,
spec ContainerSpec,
resourceTypes atc.VersionedResourceTypes,
resourceTypeName string,
version atc.Version,
source atc.Source,
params atc.Params,
) (Container, error) {
containerProvider := worker.containerProviderFactory.ContainerProviderFor(worker)
return containerProvider.CreateResourceGetContainer(
logger,
resourceUser,
cancel,
delegate,
metadata,
spec,
resourceTypes,
resourceTypeName,
version,
source,
params,
)
}
func (worker *gardenWorker) FindOrCreateResourceCheckContainer(
logger lager.Logger,
resourceUser dbng.ResourceUser,
cancel <-chan os.Signal,
delegate ImageFetchingDelegate,
metadata dbng.ContainerMetadata,
spec ContainerSpec,
resourceTypes atc.VersionedResourceTypes,
resourceType string,
source atc.Source,
) (Container, error) {
containerProvider := worker.containerProviderFactory.ContainerProviderFor(worker)
return containerProvider.FindOrCreateResourceCheckContainer(
logger,
resourceUser,
cancel,
delegate,
metadata,
spec,
resourceTypes,
resourceType,
source,
)
}
func (worker *gardenWorker) FindContainerByHandle(logger lager.Logger, teamID int, handle string) (Container, bool, error) {
containerProvider := worker.containerProviderFactory.ContainerProviderFor(worker)
return containerProvider.FindCreatedContainerByHandle(logger, handle, teamID)
}
func (worker *gardenWorker) ActiveContainers() int {
return worker.activeContainers
}
func (worker *gardenWorker) Satisfying(spec WorkerSpec, resourceTypes atc.VersionedResourceTypes) (Worker, error) {
if spec.TeamID != worker.teamID && worker.teamID != 0 {
return nil, ErrTeamMismatch
}
if spec.ResourceType != "" {
underlyingType := determineUnderlyingTypeName(spec.ResourceType, resourceTypes)
matchedType := false
for _, t := range worker.resourceTypes {
if t.Type == underlyingType {
matchedType = true
break
}
}
if !matchedType {
return nil, ErrUnsupportedResourceType
}
}
if spec.Platform != "" {
if spec.Platform != worker.platform {
return nil, ErrIncompatiblePlatform
}
}
if !worker.tagsMatch(spec.Tags) {
return nil, ErrMismatchedTags
}
return worker, nil
}
func determineUnderlyingTypeName(typeName string, resourceTypes atc.VersionedResourceTypes) string {
resourceTypesMap := make(map[string]atc.VersionedResourceType)
for _, resourceType := range resourceTypes {
resourceTypesMap[resourceType.Name] = resourceType
}
underlyingTypeName := typeName
underlyingType, ok := resourceTypesMap[underlyingTypeName]
for ok {
underlyingTypeName = underlyingType.Type
underlyingType, ok = resourceTypesMap[underlyingTypeName]
delete(resourceTypesMap, underlyingTypeName)
}
return underlyingTypeName
}
func (worker *gardenWorker) AllSatisfying(spec WorkerSpec, resourceTypes atc.VersionedResourceTypes) ([]Worker, error) {
return nil, ErrNotImplemented
}
func (worker *gardenWorker) RunningWorkers() ([]Worker, error) {
return nil, ErrNotImplemented
}
func (worker *gardenWorker) GetWorker(name string) (Worker, error) {
return nil, ErrNotImplemented
}
func (worker *gardenWorker) Description() string {
messages := []string{
fmt.Sprintf("platform '%s'", worker.platform),
}
for _, tag := range worker.tags {
messages = append(messages, fmt.Sprintf("tag '%s'", tag))
}
return strings.Join(messages, ", ")
}
func (worker *gardenWorker) Name() string {
return worker.name
}
func (worker *gardenWorker) ResourceTypes() []atc.WorkerResourceType {
return worker.resourceTypes
}
func (worker *gardenWorker) Tags() atc.Tags {
return worker.tags
}
func (worker *gardenWorker) IsOwnedByTeam() bool {
return worker.teamID != 0
}
func (worker *gardenWorker) Uptime() time.Duration {
return worker.clock.Since(time.Unix(worker.startTime, 0))
}
func (worker *gardenWorker) tagsMatch(tags []string) bool {
if len(worker.tags) > 0 && len(tags) == 0 {
return false
}
insert_coin:
for _, stag := range tags {
for _, wtag := range worker.tags {
if stag == wtag {
continue insert_coin
}
}
return false
}
return true
}
type artifactDestination struct {
destination Volume
}
func (wad *artifactDestination) StreamIn(path string, tarStream io.Reader) error {
return wad.destination.StreamIn(path, tarStream)
}