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worker.go
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worker.go
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package worker
import (
"context"
"errors"
"fmt"
"strings"
"time"
"code.cloudfoundry.org/clock"
"code.cloudfoundry.org/garden"
"code.cloudfoundry.org/lager"
"github.com/concourse/atc"
"github.com/concourse/atc/creds"
"github.com/concourse/atc/db"
"github.com/concourse/baggageclaim"
"github.com/cppforlife/go-semi-semantic/version"
)
var ErrUnsupportedResourceType = errors.New("unsupported resource type")
var ErrIncompatiblePlatform = errors.New("incompatible platform")
var ErrMismatchedTags = errors.New("mismatched tags")
var ErrTeamMismatch = errors.New("mismatched team")
var ErrNotImplemented = errors.New("Not implemented")
const userPropertyName = "user"
//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
Ephemeral() bool
IsVersionCompatible(lager.Logger, *version.Version) bool
FindVolumeForResourceCache(logger lager.Logger, resourceCache db.UsedResourceCache) (Volume, bool, error)
FindVolumeForTaskCache(lager.Logger, int, int, string, string) (Volume, bool, error)
CertsVolume(lager.Logger) (volume Volume, found bool, err error)
GardenClient() garden.Client
}
type gardenWorker struct {
gardenClient garden.Client
baggageclaimClient baggageclaim.Client
volumeClient VolumeClient
containerProvider ContainerProvider
clock clock.Clock
activeContainers int
resourceTypes []atc.WorkerResourceType
platform string
tags atc.Tags
teamID int
name string
startTime int64
ephemeral bool
version *string
}
func NewGardenWorker(
gardenClient garden.Client,
baggageclaimClient baggageclaim.Client,
containerProvider ContainerProvider,
volumeClient VolumeClient,
dbWorker db.Worker,
clock clock.Clock,
) Worker {
return &gardenWorker{
gardenClient: gardenClient,
baggageclaimClient: baggageclaimClient,
volumeClient: volumeClient,
containerProvider: containerProvider,
clock: clock,
activeContainers: dbWorker.ActiveContainers(),
resourceTypes: dbWorker.ResourceTypes(),
platform: dbWorker.Platform(),
tags: dbWorker.Tags(),
teamID: dbWorker.TeamID(),
name: dbWorker.Name(),
startTime: dbWorker.StartTime(),
version: dbWorker.Version(),
ephemeral: dbWorker.Ephemeral(),
}
}
func (worker *gardenWorker) GardenClient() garden.Client {
return worker.gardenClient
}
func (worker *gardenWorker) IsVersionCompatible(logger lager.Logger, comparedVersion *version.Version) bool {
if comparedVersion == nil {
return true
}
logger = logger.Session("check-version", lager.Data{
"want-worker-version": comparedVersion.String(),
"have-worker-version": worker.version,
})
if worker.version == nil {
logger.Info("empty-worker-version")
return false
}
v, err := version.NewVersionFromString(*worker.version)
if err != nil {
logger.Error("failed-to-parse-version", err)
return false
}
switch v.Release.Compare(comparedVersion.Release) {
case 0:
return true
case -1:
return false
default:
if v.Release.Components[0].Compare(comparedVersion.Release.Components[0]) == 0 {
return true
}
return false
}
}
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) FindVolumeForResourceCache(logger lager.Logger, resourceCache db.UsedResourceCache) (Volume, bool, error) {
return worker.volumeClient.FindVolumeForResourceCache(logger, resourceCache)
}
func (worker *gardenWorker) FindVolumeForTaskCache(logger lager.Logger, teamID int, jobID int, stepName string, path string) (Volume, bool, error) {
return worker.volumeClient.FindVolumeForTaskCache(logger, teamID, jobID, stepName, path)
}
func (worker *gardenWorker) CertsVolume(logger lager.Logger) (Volume, bool, error) {
return worker.volumeClient.FindOrCreateVolumeForResourceCerts(logger.Session("find-or-create"))
}
func (worker *gardenWorker) LookupVolume(logger lager.Logger, handle string) (Volume, bool, error) {
return worker.volumeClient.LookupVolume(logger, handle)
}
func (worker *gardenWorker) FindOrCreateContainer(
ctx context.Context,
logger lager.Logger,
delegate ImageFetchingDelegate,
owner db.ContainerOwner,
metadata db.ContainerMetadata,
spec ContainerSpec,
resourceTypes creds.VersionedResourceTypes,
) (Container, error) {
return worker.containerProvider.FindOrCreateContainer(
ctx,
logger,
owner,
delegate,
metadata,
spec,
resourceTypes,
)
}
func (worker *gardenWorker) FindContainerByHandle(logger lager.Logger, teamID int, handle string) (Container, bool, error) {
return worker.containerProvider.FindCreatedContainerByHandle(logger, handle, teamID)
}
func (worker *gardenWorker) ActiveContainers() int {
return worker.activeContainers
}
func (worker *gardenWorker) Satisfying(logger lager.Logger, spec WorkerSpec, resourceTypes creds.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 creds.VersionedResourceTypes) string {
resourceTypesMap := make(map[string]creds.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(logger lager.Logger, spec WorkerSpec, resourceTypes creds.VersionedResourceTypes) ([]Worker, error) {
return nil, ErrNotImplemented
}
func (worker *gardenWorker) RunningWorkers(logger lager.Logger) ([]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) Ephemeral() bool {
return worker.ephemeral
}
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
}