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fix(endpoints): ensure endpoint is up to date after snapshot (#2460) 

* feat(snapshots): fix a potential concurrency issue with endpoint snapshots

* fix(endpoints): ensure endpoint is up to date after snapshot
pull/2462/head
Anthony Lapenna 2018-11-13 15:18:38 +13:00 committed by GitHub
parent 64c29f7402
commit 381ab81fdd
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 33 additions and 14 deletions
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23
api/cron/job_snapshot.go
View File

@ -42,6 +42,8 @@ func (runner *SnapshotJobRunner) GetSchedule() *portainer.Schedule {
// Run triggers the execution of the schedule.
// It will iterate through all the endpoints available in the database to
// create a snapshot of each one of them.
// As a snapshot can be a long process, to avoid any concurrency issue we
// retrieve the latest version of the endpoint right after a snapshot.
func (runner *SnapshotJobRunner) Run() {
endpoints, err := runner.context.endpointService.Endpoints()
if err != nil {
@ -54,18 +56,25 @@ func (runner *SnapshotJobRunner) Run() {
continue
}
snapshot, err := runner.context.snapshotter.CreateSnapshot(&endpoint)
endpoint.Status = portainer.EndpointStatusUp
if err != nil {
log.Printf("background schedule error (endpoint snapshot). Unable to create snapshot (endpoint=%s, URL=%s) (err=%s)\n", endpoint.Name, endpoint.URL, err)
endpoint.Status = portainer.EndpointStatusDown
snapshot, snapshotError := runner.context.snapshotter.CreateSnapshot(&endpoint)
latestEndpointReference, err := runner.context.endpointService.Endpoint(endpoint.ID)
if latestEndpointReference == nil {
log.Printf("background schedule error (endpoint snapshot). Endpoint not found inside the database anymore (endpoint=%s, URL=%s) (err=%s)\n", endpoint.Name, endpoint.URL, err)
continue
}
latestEndpointReference.Status = portainer.EndpointStatusUp
if snapshotError != nil {
log.Printf("background schedule error (endpoint snapshot). Unable to create snapshot (endpoint=%s, URL=%s) (err=%s)\n", endpoint.Name, endpoint.URL, snapshotError)
latestEndpointReference.Status = portainer.EndpointStatusDown
}
if snapshot != nil {
endpoint.Snapshots = []portainer.Snapshot{*snapshot}
latestEndpointReference.Snapshots = []portainer.Snapshot{*snapshot}
}
err = runner.context.endpointService.UpdateEndpoint(endpoint.ID, &endpoint)
err = runner.context.endpointService.UpdateEndpoint(latestEndpointReference.ID, latestEndpointReference)
if err != nil {
log.Printf("background schedule error (endpoint snapshot). Unable to update endpoint (endpoint=%s, URL=%s) (err=%s)\n", endpoint.Name, endpoint.URL, err)
return

24
api/http/handler/endpoints/endpoint_snapshot.go
View File

@ -3,6 +3,7 @@ package endpoints
import (
"log"
"net/http"
"time"
httperror "github.com/portainer/libhttp/error"
"github.com/portainer/libhttp/response"
@ -21,18 +22,27 @@ func (handler *Handler) endpointSnapshot(w http.ResponseWriter, r *http.Request)
continue
}
snapshot, err := handler.Snapshotter.CreateSnapshot(&endpoint)
endpoint.Status = portainer.EndpointStatusUp
if err != nil {
log.Printf("http error: endpoint snapshot error (endpoint=%s, URL=%s) (err=%s)\n", endpoint.Name, endpoint.URL, err)
endpoint.Status = portainer.EndpointStatusDown
time.Sleep(10 * time.Second)
snapshot, snapshotError := handler.Snapshotter.CreateSnapshot(&endpoint)
latestEndpointReference, err := handler.EndpointService.Endpoint(endpoint.ID)
if latestEndpointReference == nil {
log.Printf("background schedule error (endpoint snapshot). Endpoint not found inside the database anymore (endpoint=%s, URL=%s) (err=%s)\n", endpoint.Name, endpoint.URL, err)
continue
}
latestEndpointReference.Status = portainer.EndpointStatusUp
if snapshotError != nil {
log.Printf("background schedule error (endpoint snapshot). Unable to create snapshot (endpoint=%s, URL=%s) (err=%s)\n", endpoint.Name, endpoint.URL, snapshotError)
latestEndpointReference.Status = portainer.EndpointStatusDown
}
if snapshot != nil {
endpoint.Snapshots = []portainer.Snapshot{*snapshot}
latestEndpointReference.Snapshots = []portainer.Snapshot{*snapshot}
}
err = handler.EndpointService.UpdateEndpoint(endpoint.ID, &endpoint)
err = handler.EndpointService.UpdateEndpoint(latestEndpointReference.ID, latestEndpointReference)
if err != nil {
return &httperror.HandlerError{http.StatusInternalServerError, "Unable to persist endpoint changes inside the database", err}
}