c7d59810e5
As we can't control which allocations are destroyed when downscaling a job, we decided to use Nomad jobs as our runners. Thus for each runner we prewarm for an environment, a corresponding job is created in Nomad. We create a default job that serves as a template for the runners. Using this, already existing execution environments can easily be restored, once Poseidon is restarted.
63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
package runner
|
|
|
|
import (
|
|
"sync"
|
|
)
|
|
|
|
// NomadEnvironmentStorage is an interface for storing NomadJobs.
|
|
type NomadEnvironmentStorage interface {
|
|
// Add adds a job to the storage.
|
|
// It overwrites the old job if one with the same id was already stored.
|
|
Add(job *NomadEnvironment)
|
|
|
|
// Get returns a job from the storage.
|
|
// Iff the job does not exist in the store, ok will be false.
|
|
Get(id EnvironmentID) (job *NomadEnvironment, ok bool)
|
|
|
|
// Delete deletes the job with the passed id from the storage. It does nothing if no job with the id is present in
|
|
// the storage.
|
|
Delete(id EnvironmentID)
|
|
|
|
// Length returns the number of currently stored environments in the storage.
|
|
Length() int
|
|
}
|
|
|
|
// localNomadJobStorage stores NomadEnvironment objects in the local application memory.
|
|
type localNomadJobStorage struct {
|
|
sync.RWMutex
|
|
jobs map[EnvironmentID]*NomadEnvironment
|
|
}
|
|
|
|
// NewLocalNomadJobStorage responds with an empty localNomadJobStorage.
|
|
// This implementation stores the data thread-safe in the local application memory.
|
|
func NewLocalNomadJobStorage() *localNomadJobStorage {
|
|
return &localNomadJobStorage{
|
|
jobs: make(map[EnvironmentID]*NomadEnvironment),
|
|
}
|
|
}
|
|
|
|
func (s *localNomadJobStorage) Add(job *NomadEnvironment) {
|
|
s.Lock()
|
|
defer s.Unlock()
|
|
s.jobs[job.ID()] = job
|
|
}
|
|
|
|
func (s *localNomadJobStorage) Get(id EnvironmentID) (job *NomadEnvironment, ok bool) {
|
|
s.RLock()
|
|
defer s.RUnlock()
|
|
job, ok = s.jobs[id]
|
|
return
|
|
}
|
|
|
|
func (s *localNomadJobStorage) Delete(id EnvironmentID) {
|
|
s.Lock()
|
|
defer s.Unlock()
|
|
delete(s.jobs, id)
|
|
}
|
|
|
|
func (s *localNomadJobStorage) Length() int {
|
|
s.RLock()
|
|
defer s.RUnlock()
|
|
return len(s.jobs)
|
|
}
|