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containerkeepaliver.go
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/
containerkeepaliver.go
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package containerkeepaliver
import (
"time"
"code.cloudfoundry.org/lager"
"github.com/concourse/atc/db"
"github.com/concourse/atc/worker"
)
type ContainerKeepAliver interface {
Run() error
}
//go:generate counterfeiter . ContainerKeepAliverDB
type ContainerKeepAliverDB interface {
FindJobIDForBuild(buildID int) (int, bool, error)
FindLatestSuccessfulBuildsPerJob() (map[int]int, error)
FindJobContainersFromUnsuccessfulBuilds() ([]db.SavedContainer, error)
UpdateExpiresAtOnContainer(handle string, ttl time.Duration) error
GetPipelineByID(pipelineID int) (db.SavedPipeline, error)
}
type containerKeepAliver struct {
logger lager.Logger
workerClient worker.Client
db ContainerKeepAliverDB
pipelineDBFactory db.PipelineDBFactory
}
func NewContainerKeepAliver(
logger lager.Logger,
workerClient worker.Client,
db ContainerKeepAliverDB,
pipelineDBFactory db.PipelineDBFactory,
) ContainerKeepAliver {
return &containerKeepAliver{
logger: logger,
workerClient: workerClient,
db: db,
pipelineDBFactory: pipelineDBFactory,
}
}
func (cr *containerKeepAliver) Run() error {
latestSuccessfulBuilds, err := cr.db.FindLatestSuccessfulBuildsPerJob()
if err != nil {
cr.logger.Error("failed-to-find-successful-containers", err)
}
failedContainers, err := cr.db.FindJobContainersFromUnsuccessfulBuilds()
if err != nil {
cr.logger.Error("failed-to-find-unsuccessful-containers", err)
return err
}
// if the latest build failed update its ttl, allow everything else expire
failedJobContainerMap := cr.buildFailedMap(failedContainers)
for jobID, jobContainers := range failedJobContainerMap {
maxFailedBuildID := -1
for _, jobContainer := range jobContainers {
if jobContainer.BuildID > maxFailedBuildID {
maxFailedBuildID = jobContainer.BuildID
}
}
for _, jobContainer := range jobContainers {
maxSuccessfulBuildID := latestSuccessfulBuilds[jobID]
if maxSuccessfulBuildID > maxFailedBuildID || maxFailedBuildID > jobContainer.BuildID {
} else {
cr.keepAlive(jobContainer.Handle)
}
}
}
return nil
}
func (cr *containerKeepAliver) buildFailedMap(containers []db.SavedContainer) map[int][]db.SavedContainer {
var jobContainerMap map[int][]db.SavedContainer
jobContainerMap = make(map[int][]db.SavedContainer)
for _, container := range containers {
savedPipeline, err := cr.db.GetPipelineByID(container.PipelineID)
if err != nil {
cr.logger.Error("failed-to-find-pipeline-for-build", err, lager.Data{"build-id": container.BuildID})
continue
}
pipelineDB := cr.pipelineDBFactory.Build(savedPipeline)
pipelineConfig, _, found, err := pipelineDB.GetConfig()
if err != nil || !found {
cr.logger.Error("failed-to-get-pipeline-config", err, lager.Data{"build-id": container.BuildID, "found": found})
continue
}
jobExpired := true
for _, jobConfig := range pipelineConfig.Jobs {
if jobConfig.Name == container.JobName {
jobExpired = false
break
}
}
if jobExpired {
cr.logger.Debug("job-expired", lager.Data{"build-id": container.BuildID})
continue
}
buildID := container.BuildID
jobID, found, err := cr.db.FindJobIDForBuild(buildID)
if err != nil || !found {
cr.logger.Error("find-job-id-for-build", err, lager.Data{"build-id": buildID, "found": found})
continue
}
jobContainers := jobContainerMap[jobID]
if jobContainers == nil {
jobContainerMap[jobID] = []db.SavedContainer{container}
} else {
jobContainers = append(jobContainers, container)
jobContainerMap[jobID] = jobContainers
}
}
return jobContainerMap
}
func (cr *containerKeepAliver) keepAlive(handle string) {
cr.logger.Debug("keeping alive container", lager.Data{"handle": handle})
workerContainer, found, err := cr.workerClient.LookupContainer(cr.logger, handle)
if err != nil {
cr.logger.Error("failed-to-keep-alive-container", err, lager.Data{"handle": handle})
}
if found {
workerContainer.Release(nil)
}
}