// UpdateAllocFromClient is used to update an allocation based on input
// from a client. While the schedulers are the authority on the allocation for
// most things, some updates are authoritative from the client. Specifically,
// the desired state comes from the schedulers, while the actual state comes
// from clients.
func (s *StateStore) UpdateAllocFromClient(index uint64, alloc *structs.Allocation) error {
txn := s.db.Txn(true)
defer txn.Abort()
watcher := watch.NewItems()
watcher.Add(watch.Item{Table: "allocs"})
watcher.Add(watch.Item{Alloc: alloc.ID})
watcher.Add(watch.Item{AllocEval: alloc.EvalID})
watcher.Add(watch.Item{AllocJob: alloc.JobID})
watcher.Add(watch.Item{AllocNode: alloc.NodeID})
// Look for existing alloc
existing, err := txn.First("allocs", "id", alloc.ID)
if err != nil {
return fmt.Errorf("alloc lookup failed: %v", err)
}
// Nothing to do if this does not exist
if existing == nil {
return nil
}
exist := existing.(*structs.Allocation)
// Copy everything from the existing allocation
copyAlloc := new(structs.Allocation)
*copyAlloc = *exist
// Pull in anything the client is the authority on
copyAlloc.ClientStatus = alloc.ClientStatus
copyAlloc.ClientDescription = alloc.ClientDescription
copyAlloc.TaskStates = alloc.TaskStates
// Update the modify index
copyAlloc.ModifyIndex = index
// Update the allocation
if err := txn.Insert("allocs", copyAlloc); err != nil {
return fmt.Errorf("alloc insert failed: %v", err)
}
// Update the indexes
if err := txn.Insert("index", &IndexEntry{"allocs", index}); err != nil {
return fmt.Errorf("index update failed: %v", err)
}
// Set the job's status
forceStatus := ""
if !copyAlloc.TerminalStatus() {
forceStatus = structs.JobStatusRunning
}
jobs := map[string]string{alloc.JobID: forceStatus}
if err := s.setJobStatuses(index, watcher, txn, jobs, false); err != nil {
return fmt.Errorf("setting job status failed: %v", err)
}
txn.Defer(func() { s.watch.notify(watcher) })
txn.Commit()
return nil
}
// nestedUpdateAllocFromClient is used to nest an update of an allocation with client status
func (s *StateStore) nestedUpdateAllocFromClient(txn *memdb.Txn, watcher watch.Items, index uint64, alloc *structs.Allocation) error {
// Look for existing alloc
existing, err := txn.First("allocs", "id", alloc.ID)
if err != nil {
return fmt.Errorf("alloc lookup failed: %v", err)
}
// Nothing to do if this does not exist
if existing == nil {
return nil
}
exist := existing.(*structs.Allocation)
// Trigger the watcher
watcher.Add(watch.Item{Alloc: alloc.ID})
watcher.Add(watch.Item{AllocEval: exist.EvalID})
watcher.Add(watch.Item{AllocJob: exist.JobID})
watcher.Add(watch.Item{AllocNode: exist.NodeID})
// Copy everything from the existing allocation
copyAlloc := new(structs.Allocation)
*copyAlloc = *exist
// Pull in anything the client is the authority on
copyAlloc.ClientStatus = alloc.ClientStatus
copyAlloc.ClientDescription = alloc.ClientDescription
copyAlloc.TaskStates = alloc.TaskStates
// Update the modify index
copyAlloc.ModifyIndex = index
if err := s.updateSummaryWithAlloc(index, copyAlloc, exist, watcher, txn); err != nil {
return fmt.Errorf("error updating job summary: %v", err)
}
// Update the allocation
if err := txn.Insert("allocs", copyAlloc); err != nil {
return fmt.Errorf("alloc insert failed: %v", err)
}
// Set the job's status
forceStatus := ""
if !copyAlloc.TerminalStatus() {
forceStatus = structs.JobStatusRunning
}
jobs := map[string]string{exist.JobID: forceStatus}
if err := s.setJobStatuses(index, watcher, txn, jobs, false); err != nil {
return fmt.Errorf("setting job status failed: %v", err)
}
return nil
}