drmaa2os

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 Go to latest Published: Feb 1, 2024 License: Apache-2.0 Imports: 15 Imported by: 21

README

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drmaa2os - A Go API for OS Processes, Docker Containers, Cloud Foundry Tasks, Kubernetes Jobs, Grid Engine Jobs, Podman containers, and more...

DRMAA2 for OS processes and more

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Update: The Go DRMAA2 interface and the implementation based on the JobTracker interface are now decoupled. In order to use a specific backend, like Docker, the package providing the JobTracker implementation needs to be imported so that the init() method is called for registering at the DRMAA2 implementation.

Like when using the Docker backend:

	_ "github.com/dgruber/drmaa2os/pkg/jobtracker/dockertracker"

This is a Go API based on an open standard (Open Grid Forum DRMAA2) for submitting and supervising workloads running in operating system processes, containers, PODs, tasks, or HPC batch jobs.

The API allows you to develop and run job workflows in OS processes and switch later to containers running in Kubernetes, as Cloud Foundry tasks, pure Docker, Singularity, or any HPC workload manager which supports the DRMAA standard through the C libdrmaa.so library (like SLURM, Grid Engine, ...) without changing the application logic.

Its main purpose is supporting you with an abstraction layer on top of platforms, workload managers, and HPC cluster schedulers, so that a software developer don't need to deal with the underlaying details and differences of job submission, status checking, and more.

An even simpler interface for creating job workflows without dealing with the DRMAA2 details is wfl which is based on the Go DRMAA2 implementation.

For details about the mapping of job operations please consult the platform specific READMEs:

In a very experimental state are:

Note, that Singularity/Apptainer (or Podman) should be considered to be handled with the regular OS process backend, just starting the container cli. You gain features like job array task throttling and more...

Feedback welcome!

For a Go DRMAA2 wrapper based on C DRMAA2 (libdrmaa2.so) like for Univa Grid Engine please check out drmaa2.

Basic Usage

Following example demonstrates how a job running as OS process can be executed. More examples can be found in the examples subdirectory. Per default jobs are managed in main memory hence after restarting your app all processes are not visible to your app even they are running. If persistency between restarts is required, please use NewDefaultSessionManagerWithParams() with a simpletracker.SimpleTrackerInitParams as argument.

Note that at this point in time only JobSessions are implemented.

    import (
        "github.com/dgruber/drmaa2os
        _ "github.com/dgruber/drmaa2os/pkg/jobtracker/simpletracker"
    )

	sm, err := drmaa2os.NewDefaultSessionManager("testdb.db")
	if err != nil {
		panic(err)
	}

	js, err := sm.CreateJobSession("jobsession", "")
	if err != nil {
		panic(err)
	}

	jt := drmaa2interface.JobTemplate{
		RemoteCommand: "sleep",
		Args:          []string{"2"},
	}

	job, err := js.RunJob(jt)
	if err != nil {
		panic(err)
	}

	job.WaitTerminated(drmaa2interface.InfiniteTime)

	if job.GetState() == drmaa2interface.Done {
		job2, _ := js.RunJob(jt)
		job2.WaitTerminated(drmaa2interface.InfiniteTime)
	} else {
		fmt.Println("Failed to execute job1 successfully")
	}

	js.Close()
	sm.DestroyJobSession("jobsession")

Using other Backends

Using other backends for workload management and execution only differs in creating a different SessionManager. Different JobTemplate attributes might be necessary when switching the implementation. If using a backend which supports container images it might be required to set the JobCategory to the container image name.

Docker

If Docker is installed locally it will automatically detect it. For pointing to a different host environment variables needs to be set before the SessionManager is created.

"Use DOCKER_HOST to set the url to the docker server. Use DOCKER_API_VERSION to set the version of the API to reach, leave empty for latest. Use DOCKER_CERT_PATH to load the TLS certificates from. Use DOCKER_TLS_VERIFY to enable or disable TLS verification, off by default."


    import (
        "github.com/dgruber/drmaa2os
        _ "github.com/dgruber/drmaa2os/pkg/jobtracker/dockertracker"
    )

	sm, err := drmaa2os.NewDockerSessionManager("testdb.db")
	if err != nil {
		panic(err)
	}

	js, err := sm.CreateJobSession("jobsession", "")
	if err != nil {
		panic(err)
	}

	jt := drmaa2interface.JobTemplate{
		RemoteCommand: "sleep",
		Args:          []string{"2"},
		JobCategory:   "busybox",
	}
	job, err := js.RunJob(jt)
	if err != nil {
		panic(err)
	}

	job.WaitTerminated(drmaa2interface.InfiniteTime)

	js.Close()
	sm.DestroyJobSession("jobsession")
Kubernetes

    import (
        "github.com/dgruber/drmaa2os
        _ "github.com/dgruber/drmaa2os/pkg/jobtracker/kubernetestracker"
    )

	sm, err := drmaa2os.NewKubernetesSessionManager("testdb.db")
	if err != nil {
		panic(err)
	}

	js, err := sm.CreateJobSession("jobsession", "")
	if err != nil {
		panic(err)
	}

	jt := drmaa2interface.JobTemplate{
		RemoteCommand: "sleep",
		Args:          []string{"2"},
		JobCategory:   "busybox",
	}
	job, err := js.RunJob(jt)
	if err != nil {
		panic(err)
	}

	job.WaitTerminated(drmaa2interface.InfiniteTime)

	js.Close()
	sm.DestroyJobSession("jobsession")
Cloud Foundry

The Cloud Foundry SessionManager requires details for connecting to the Cloud Foundry cloud controller API when being created. The JobCategory needs to be set to the application GUID which is the source of the container image of the task.


    import (
        "github.com/dgruber/drmaa2os
        _ "github.com/dgruber/drmaa2os/pkg/jobtracker/cftracker"
    )

	sm, err := drmaa2os.NewCloudFoundrySessionManager("api.run.pivotal.io", "user", "password", "test.db")
	if err != nil {
		panic(err)
	}

	js, err := sm.CreateJobSession("jobsession", "")
	if err != nil {
		panic(err)
	}

	jt := drmaa2interface.JobTemplate{
		RemoteCommand: "dbbackup.sh",
		Args:          []string{"location"},
		JobCategory:   "123CFAPPGUID",
	}
	job, err := js.RunJob(jt)
	if err != nil {
		panic(err)
	}

	job.WaitTerminated(drmaa2interface.InfiniteTime)

	js.Close()
	sm.DestroyJobSession("jobsession")
Singularity

Note, for Singularity it is recommended to use the process backend (simpletracker / calling Singularity command line interface) as the Singularity implementation was an experiment and is not tested with newer versions of Singularity.

The Singularity SessionManager wraps the singularity command which is required to be installed. The container images can be provided in any form (like pointing to file or shub) but are required to be set as JobCategory for each job.


    import (
        "github.com/dgruber/drmaa2os
        _ "github.com/dgruber/drmaa2os/pkg/jobtracker/singularity"
    )

	sm, err := drmaa2os.NewSingularitySessionManager("testdb.db")
	if err != nil {
		panic(err)
	}

	js, err := sm.CreateJobSession("jobsession", "")
	if err != nil {
		panic(err)
	}

	jt := drmaa2interface.JobTemplate{
		RemoteCommand: "sleep",
		Args:          []string{"2"},
		JobCategory:   "shub://GodloveD/lolcow",
	}

	job, err := js.RunJob(jt)
	if err != nil {
		panic(err)
	}

	job.WaitTerminated(drmaa2interface.InfiniteTime)

	js.Close()
	sm.DestroyJobSession("jobsession")
DRMAA (version 1) - libdrmaa.so

The LibDRMAASessionManager can be used for submitting jobs through a pre-existing libdrmaa.so which is available and supported by many HPC workload managers (like Univa Grid Engine, SLURM, PBS, LSF, Son of Grid Engine, ...).

There are a few things to consider at compile time and runtime. The CGO_LDFLAGS and CGO_CFLAGS must be set according to the documentation in https://github.com/dgruber/drmaa. Also the LD_LIBRARY_PATH needs to be set accordingly.

An example using Grid Engine running in a container is here

The compile time configuration is external meaning the C library must be in the path or LD_LIBRARY_PATH and CGO_LDFLAGS and CGO_CFLAGS must be set according to the documentation in https://github.com/dgruber/drmaa.


    import (
        "github.com/dgruber/drmaa2os
        _ "github.com/dgruber/drmaa2os/pkg/jobtracker/libdrmaa"
    )
    
	sm, err := drmaa2os.NewLibDRMAASessionManager("testdb.db")
	if err != nil {
		panic(err)
	}
Podman (Remote)

First experimental version is implemented and tested on macos accessing Podman on a remote VM. When compiling on macos brew install gpgme helped me getting the C header dependencies of Podman installed. Accessing podman can be achieved through ssh in that case (calling podman system service --time=0 unix:///tmp/podman.sock in the podman VM for which the ssh port is defined at localhost:2222 on a Vagrant based vbox VM).

If ConnectionURIOverride is not set the implementation uses the default connection to the Podman REST API server. This server can be setup by podman system service -t 0 & in Linux environments.

Note, that it currently the implementation expects that the images are pre-pulled.

For running podman locally the process based implementation (simpletracker) can be used.


    import (
        "github.com/dgruber/drmaa2os
        _ "github.com/dgruber/drmaa2os/pkg/jobtracker/podmantracker"
    )
    
	sm, err := drmaa2os.NewPodmanSessionManager(PodmanTrackerParams{
					ConnectionURIOverride: "ssh://vagrant@localhost:2222/tmp/podman.sock?secure=False",
				}, "testdb.db")
	if err != nil {
		panic(err)
	}
Remote

The remote directory in /pkg/jobtracker contains a client/server implementation of the JobTracker interface allowing to create clients and server for any backends (JobTracker implementations) mentioned above. The client/server protocol is defined in OpenAPI v3. Based on that Go client and server stubs have been generated using oapi-codegen. The OpenAPI spec contains also the DRMAA2 data types which might be useful for other projects.

The remote JobTracker server can be used in any Go DRMAA2 application.

    import (
        "github.com/dgruber/drmaa2os
        _ "github.com/dgruber/drmaa2os/pkg/jobtracker/remote/client"
    )
    
	sm, err := drmaa2os.NewRemoteSessionManager(ClientTrackerParams{
					Server: "localhost:8080",
				}, "testdb.db")
	if err != nil {
		panic(err)
	}

The server can be implemented by using any JobTracker implementation as argument in the server implementation.

    import(
        "github.com/dgruber/drmaa2os/pkg/jobtracker/remote/server"
        genserver "github.com/dgruber/drmaa2os/pkg/jobtracker/remote/server/generated"
    )
    func main() {
        SetupHandler(simpletracker.New("jobsession"))
    }

    func SetupHandler(jobtracker jobtracker.JobTracker) {
	    impl, _ := server.NewJobTrackerImpl(jobtracker)

	    s := &http.Server{
		    Addr:           ":8080",
		    Handler:        genserver.Handler(impl),
		    ReadTimeout:    10 * time.Second,
		    WriteTimeout:   10 * time.Second,
		    MaxHeaderBytes: 1 << 20,
	    }
	    log.Fatal(s.ListenAndServe())
}

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	ErrorUnsupportedOperation = DRMAA2Error{"This optional function is not suppported."}
	ErrorJobNotExists         = DRMAA2Error{"The job does not exist."}
	ErrorInvalidState         = DRMAA2Error{"Invalid state."}
	ErrorInternal             = DRMAA2Error{"Internal error occurred."}
	ErrorInvalidSession       = DRMAA2Error{"The session used for the method call is not valid."}
)

Functions

func RegisterJobTracker added in v0.3.0 

func RegisterJobTracker(sessionType SessionType, tracker jobtracker.Allocator)

RegisterJobTracker registers a JobTracker implementation at session manager so that it can be used. This is done in the init() method of the JobTracker implementation. That means the application which wants to use a specific JobTracker needs to import the JobTracker implementation package with _.

Like when Docker needs to be used as job management backend:

import _ "github.com/dgruber/drmaa2os/pkg/jobtracker/pkg/dockertracker"

When multiple backends to be used, all of them needs to be imported so that they are registered in the main application.

func TryToSetContactString added in v0.3.13 

func TryToSetContactString(createParams interface{}, contact string) error

TryToSetContactString sets the contact string in the job tracker create params if create params has a contact string field.

Types

type ArrayJob 

type ArrayJob struct {
	// contains filtered or unexported fields
}

ArrayJob represents a set of jobs created by one operation. In DRMAA, JobArray instances are only created by the RunBulkJobs method. JobArray instances differ from the JobList data structure due to their potential for representing a DRM system concept, while JobList is a DRMAA-only concept realized by language binding support.

func (*ArrayJob) GetID 

func (aj *ArrayJob) GetID() string

GetID reports the job identifier assigned to the job array by the DRM system in text form.

func (*ArrayJob) GetJobTemplate 

func (aj *ArrayJob) GetJobTemplate() drmaa2interface.JobTemplate

GetJobTemplate provides a reference to a JobTemplate instance that has equal values to the one that was used for the job submission creating this JobArray instance.

func (*ArrayJob) GetJobs 

func (aj *ArrayJob) GetJobs() []drmaa2interface.Job

GetJobs provides the list of jobs that are part of the job array, regardless of their state.

func (*ArrayJob) GetSessionName 

func (aj *ArrayJob) GetSessionName() string

GetSessionName states the name of the JobSession that was used to create the bulk job represented by this instance. If the session name cannot be determined, for example since the bulk job was created outside of a DRMAA session, the attribute SHOULD have an UNSET value (i.e. is "").

func (*ArrayJob) Hold 

func (aj *ArrayJob) Hold() error

Hold triggers a transition from QUEUED to QUEUED_HELD, or from REQUEUED to REQUEUED_HELD state.

The job control functions allow modifying the status of the job array in the DRM system, with the same semantic as in the Job interface. If one of the jobs in the array is in an inappropriate state for the particular method, the method MAY raise an InvalidStateException.

The methods SHOULD return after the action has been acknowledged by the DRM system for all jobs in the array, but MAY return before the action has been completed for all of the jobs. Some DRMAA implementations MAY allow this method to be used to control job arrays created externally to the DRMAA session. This behavior is implementation-specific.

func (*ArrayJob) Release 

func (aj *ArrayJob) Release() error

Release triggers a transition from QUEUED_HELD to QUEUED, or from REQUEUED_HELD to REQUEUED state.

The job control functions allow modifying the status of the job array in the DRM system, with the same semantic as in the Job interface. If one of the jobs in the array is in an inappropriate state for the particular method, the method MAY raise an InvalidStateException.

The methods SHOULD return after the action has been acknowledged by the DRM system for all jobs in the array, but MAY return before the action has been completed for all of the jobs. Some DRMAA implementations MAY allow this method to be used to control job arrays created externally to the DRMAA session. This behavior is implementation-specific.

func (*ArrayJob) Resume 

func (aj *ArrayJob) Resume() error

Resume triggers a job state transition from SUSPENDED to RUNNING state.

The job control functions allow modifying the status of the job array in the DRM system, with the same semantic as in the Job interface. If one of the jobs in the array is in an inappropriate state for the particular method, the method MAY raise an InvalidStateException.

The methods SHOULD return after the action has been acknowledged by the DRM system for all jobs in the array, but MAY return before the action has been completed for all of the jobs. Some DRMAA implementations MAY allow this method to be used to control job arrays created externally to the DRMAA session. This behavior is implementation-specific.

func (*ArrayJob) Suspend 

func (aj *ArrayJob) Suspend() error

Suspend triggers a job state transition from RUNNING to SUSPENDED state.

The job control functions allow modifying the status of the job array in the DRM system, with the same semantic as in the Job interface. If one of the jobs in the array is in an inappropriate state for the particular method, the method MAY raise an InvalidStateException.

The methods SHOULD return after the action has been acknowledged by the DRM system for all jobs in the array, but MAY return before the action has been completed for all of the jobs. Some DRMAA implementations MAY allow this method to be used to control job arrays created externally to the DRMAA session. This behavior is implementation-specific.

func (*ArrayJob) Terminate 

func (aj *ArrayJob) Terminate() error

Terminate triggers a transition from any of the "Started" states to one of the "Terminated" states.

The job control functions allow modifying the status of the job array in the DRM system, with the same semantic as in the Job interface. If one of the jobs in the array is in an inappropriate state for the particular method, the method MAY raise an InvalidStateException.

The methods SHOULD return after the action has been acknowledged by the DRM system for all jobs in the array, but MAY return before the action has been completed for all of the jobs. Some DRMAA implementations MAY allow this method to be used to control job arrays created externally to the DRMAA session. This behavior is implementation-specific.

type DRMAA2Error 

type DRMAA2Error struct {
	// contains filtered or unexported fields
}

func (DRMAA2Error) Error 

func (d DRMAA2Error) Error() string

type Job 

type Job struct {
	// contains filtered or unexported fields
}

Job represents a single computational activity that is executed by the DRM system. There are three relevant method sets for working with jobs: The JobSession interface represents all control and monitoring functions available for jobs. The Job interface represents the common control functionality for one existing job. Sets of jobs resulting from a bulk submission are controllable as a whole by the JobArray interface.

func (*Job) GetID 

func (j *Job) GetID() string

GetID returns the job identifier assigned by the DRM system in text form. This method is expected to be used as a fast alternative to the fetching of a complete JobInfo instance.

func (*Job) GetJobInfo 

func (j *Job) GetJobInfo() (drmaa2interface.JobInfo, error)

GetJobInfo returns a JobInfo instance for the particular job.

func (*Job) GetJobTemplate 

func (j *Job) GetJobTemplate() (drmaa2interface.JobTemplate, error)

GetJobTemplate returns a reference to a JobTemplate instance that has equal values to the one that was used for the job submission creating this Job instance. For jobs created outside of a DRMAA session, implementations MUST also return a JobTemplate instance here, which MAY be empty or only partially filled.

func (*Job) GetSessionName 

func (j *Job) GetSessionName() string

GetSessionName reports the name of the JobSession that was used to create the job. If the session name cannot be determined, for example since the job was created outside of a DRMAA session, the attribute SHOULD be UNSET (i.e. equals "").

func (*Job) GetState 

func (j *Job) GetState() drmaa2interface.JobState

GetState allows the application to get the current status of the job according to the DRMAA state model, together with an implementation specific sub state (see Section 8.1). It is intended as a fast alternative to the fetching of a complete JobInfo instance.

func (*Job) Hold 

func (j *Job) Hold() error

Hold triggers a transition from QUEUED to QUEUED_HELD, or from REQUEUED to REQUEUED_HELD state.

func (*Job) Reap 

func (j *Job) Reap() error

Reap is intended to let the DRMAA implementation clean up any data about this job. The motivating factor are long-running applications maintaining large amounts of jobs as part of a monitoring session. Using a reaped job in any subsequent activity MUST generate an InvalidArgumentException for the job parameter. This function MUST only work for jobs in "Terminated" states, so that the job is promised to not change its status while being reaped. Jobs from Monitoring Sessions can't be reaped as they are read-only.

func (*Job) Release 

func (j *Job) Release() error

Release triggers a transition from QUEUED_HELD to QUEUED, or from REQUEUED_HELD to REQUEUED state.

func (*Job) Resume 

func (j *Job) Resume() error

Resume triggers a job state transition from SUSPENDED to RUNNING state.

func (*Job) Suspend 

func (j *Job) Suspend() error

Suspend triggers a job state transition from RUNNING to SUSPENDED state.

func (*Job) Terminate 

func (j *Job) Terminate() error

Terminate triggers a transition from any of the "Started" states to one of the "Terminated" states.

func (*Job) WaitStarted 

func (j *Job) WaitStarted(timeout time.Duration) error

WaitStarted blocks until the job entered one of the "Started" states.

func (*Job) WaitTerminated 

func (j *Job) WaitTerminated(timeout time.Duration) error

WaitTerminated blocks until the job entered one of the "Terminated" states

type JobSession 

type JobSession struct {
	// contains filtered or unexported fields
}

JobSession instance acts as container for job instances controlled through the DRMAA API. The session methods support the submission of new jobs and the monitoring of existing jobs.

func (*JobSession) Close 

func (js *JobSession) Close() error

Close MUST perform the necessary action to disengage from the DRM system. It SHOULD be callable only once, by only one of the application threads. This SHOULD be ensured by the library implementation. Additional calls beyond the first one SHOULD lead to a InvalidSessionException error notification. The corresponding state information MUST be saved to some stable storage before the method returns. This method SHALL NOT affect any jobs or reservations in the session (e.g., queued and running jobs remain queued and running). (TODO)

func (*JobSession) GetContact 

func (js *JobSession) GetContact() (string, error)

GetContact method reports the contact value that was used in the SessionManager::createJobSession call for this instance. If no value was originally provided, the default contact string from the implementation MUST be returned.

func (*JobSession) GetJobArray 

func (js *JobSession) GetJobArray(id string) (drmaa2interface.ArrayJob, error)

GetJobArray method returns the JobArray instance by the given ID. If the session does not / no longer contain the according job array, InvalidArgumentException SHALL be thrown.

func (*JobSession) GetJobCategories 

func (js *JobSession) GetJobCategories() ([]string, error)

GetJobCategories provides the list of valid job category names which can be used for the jobCategory attribute in a JobTemplate instance.

func (*JobSession) GetJobs 

func (js *JobSession) GetJobs(filter drmaa2interface.JobInfo) ([]drmaa2interface.Job, error)

GetJobs returns the set of jobs that belong to the job session. The filter parameter allows to choose a subset of the session jobs as return value. If no job matches or the session has no jobs attached, the method MUST return an empty set. If filter is UNSET, all session jobs MUST be returned. Time-dependent effects of this method, such as jobs no longer matching to filter criteria on evaluation time, are implementation-specific. The purpose of the filter parameter is to keep scalability with a large number of jobs per session. Applications therefore must consider the possibly changed state of jobs during their evaluation of the method result.

func (*JobSession) GetSessionName 

func (js *JobSession) GetSessionName() (string, error)

GetSessionName reports the session name, a value that resulted from the SessionManager::createJobSession or SessionManager::openJobSession call for this instance.

func (*JobSession) RunBulkJobs 

func (js *JobSession) RunBulkJobs(jt drmaa2interface.JobTemplate, begin, end, step, maxParallel int) (drmaa2interface.ArrayJob, error)

RunBulkJobs method creates a set of parametric jobs, each with attributes as defined in the given job template instance.

func (*JobSession) RunJob 

func (js *JobSession) RunJob(jt drmaa2interface.JobTemplate) (drmaa2interface.Job, error)

RunJob method submits a job with the attributes defined in the given job template instance. The method returns a Job object that represents the job in the underlying DRM system. Depending on the job template settings, submission attempts may be rejected with an InvalidArgumentException. The error details SHOULD provide further information about the attribute(s) responsible for the rejection. When this method returns a valid Job instance, the following conditions SHOULD be fulfilled:

  • The job is part of the persistent state of the job session.
  • All non-DRMAA and DRMAA interfaces to the DRM system report the job as being submitted to the DRM system.
  • The job has one of the DRMAA job states.

func (*JobSession) WaitAnyStarted 

func (js *JobSession) WaitAnyStarted(jobs []drmaa2interface.Job, timeout time.Duration) (drmaa2interface.Job, error)

WaitAnyStarted method blocks until any of the jobs referenced in the jobs parameter entered one of the "Started" states.

The timeout argument specifies the desired waiting time for the state change. The constant value drmaa2interface.InfiniteTime MUST be supported to get an indefinite waiting time. The constant value drmaa2interface.ZeroTime MUST be supported to express that the method call SHALL return immediately. A time.Duration can be specified to indicate the maximum waiting time. If the method call returns because of timeout, an TimeoutException SHALL be raised.

func (*JobSession) WaitAnyTerminated 

func (js *JobSession) WaitAnyTerminated(jobs []drmaa2interface.Job, timeout time.Duration) (drmaa2interface.Job, error)

WaitAnyTerminated method blocks until any of the jobs referenced in the jobs parameter entered one of the "Terminated" states.

The timeout argument specifies the desired waiting time for the state change. The constant value drmaa2interface.InfiniteTime MUST be supported to get an indefinite waiting time. The constant value drmaa2interface.ZeroTime MUST be supported to express that the method call SHALL return immediately. A time.Duration can be specified to indicate the maximum waiting time. If the method call returns because of timeout, an TimeoutException SHALL be raised.

type MonitoringSession 

type MonitoringSession struct {
	// contains filtered or unexported fields
}

MonitoringSession implements a DRMAA2 monitoring session based on the JobTracker and Monitorer interface. Currently it is expected to have one object which implements both interfaces hence jobtracker and monitorer reference the same address.

func (*MonitoringSession) CloseMonitoringSession added in v0.3.16 

func (ms *MonitoringSession) CloseMonitoringSession() error

CloseMonitoringSession disengages from the backend, i.e. closes potentially the connection and can lead to a non-usable monitoring session.

func (*MonitoringSession) GetAllJobs added in v0.3.16 

func (ms *MonitoringSession) GetAllJobs(filter drmaa2interface.JobInfo) ([]drmaa2interface.Job, error)

GetAllJobs returns all visible jobs, consisting potentially multiple JobSession an external jobs. The returned jobs are potentially read-only and can't be manipulated (stopped, suspended). The filter can restrict the jobs returned, if no filter is required, drmaa2interface.CreateJobInfo() should be used as filter, which sets "Unset" values for all fields which are not nullable. See also GetAllJobsWithoutFilter().

func (*MonitoringSession) GetAllMachines added in v0.3.16 

func (ms *MonitoringSession) GetAllMachines(filter []string) ([]drmaa2interface.Machine, error)

GetAllMachines returns all machines in the cluster. If the filter is set the result contains only existing machines defined by the filter.

func (*MonitoringSession) GetAllQueues added in v0.3.16 

func (ms *MonitoringSession) GetAllQueues(filter []string) ([]drmaa2interface.Queue, error)

GetAllQueues returns all queues. If filter is set to a list of strings, it only returns queue names which are defined by the filter.

func (*MonitoringSession) GetAllReservations added in v0.3.16 

func (ms *MonitoringSession) GetAllReservations() ([]drmaa2interface.Reservation, error)

GetAllReservations returns all advance(d) reservations. Currently not implemented.

type OriginType added in v0.3.16 

type OriginType int
const (
	OriginJobSession OriginType = iota
	OriginMonitoringSession
)

type Reservation 

type Reservation struct {
}

func (*Reservation) GetID 

func (r *Reservation) GetID() (string, error)

func (*Reservation) GetInfo 

func (r *Reservation) GetInfo() (drmaa2interface.ReservationInfo, error)

func (*Reservation) GetSessionName 

func (r *Reservation) GetSessionName() (string, error)

func (*Reservation) GetTemplate 

func (r *Reservation) GetTemplate() (drmaa2interface.ReservationTemplate, error)

func (*Reservation) Terminate 

func (r *Reservation) Terminate() error

type ReservationSession 

type ReservationSession struct {
}

func (*ReservationSession) Close 

func (rs *ReservationSession) Close() error

func (*ReservationSession) GetContact 

func (rs *ReservationSession) GetContact() (string, error)

func (*ReservationSession) GetReservation 

func (rs *ReservationSession) GetReservation(string) (drmaa2interface.Reservation, error)

func (*ReservationSession) GetReservations 

func (rs *ReservationSession) GetReservations() ([]Reservation, error)

func (*ReservationSession) GetSessionName 

func (rs *ReservationSession) GetSessionName() (string, error)

func (*ReservationSession) RequestReservation 

func (rs *ReservationSession) RequestReservation(template drmaa2interface.ReservationTemplate) (drmaa2interface.Reservation, error)

type SessionManager 

type SessionManager struct {
	// contains filtered or unexported fields
}

SessionManager allows to create, list, and destroy job, reserveration, and monitoring sessions. It also returns holds basic information about the resource manager and its capabilities.

func NewCloudFoundrySessionManager 

func NewCloudFoundrySessionManager(addr, username, password, dbpath string) (*SessionManager, error)

NewCloudFoundrySessionManager creates a SessionManager which maintains jobs as Cloud Foundry tasks. addr needs to point to the cloud controller API and username and password needs to be set as well.

func NewDefaultSessionManager 

func NewDefaultSessionManager(dbpath string) (*SessionManager, error)

NewDefaultSessionManager creates a SessionManager which starts jobs as processes.

func NewDefaultSessionManagerWithParams added in v0.3.14 

func NewDefaultSessionManagerWithParams(ds interface{}, dbpath string) (*SessionManager, error)

NewDefaultSessionManagerWithParams creates a SessionManager which starts jobs as processes. By providing a simpletracker.(SimpleTrackerInitParams) data structure some specific behaviour of the JobSesion can be triggered. Currently it provides additional support for keeping job IDs during DRMAA2 applications persistent in a file based DB.

func NewDockerSessionManager 

func NewDockerSessionManager(dbpath string) (*SessionManager, error)

NewDockerSessionManager creates a SessionManager which maintains jobs as Docker containers. This requires to have following import: import(_ "github.com/dgruber/drmaa2os/pkg/jobtracker/dockertracker")

func NewGoogleBatchSessionManager added in v0.3.22 

func NewGoogleBatchSessionManager(parameters interface{}, dbpath string) (*SessionManager, error)

NewGoogleBatchSessionManager see https://github.com/dgruber/gcpbatchtracker

func NewKubernetesSessionManager 

func NewKubernetesSessionManager(cs interface{}, dbpath string) (*SessionManager, error)

NewKubernetesSessionManager creates a new session manager which uses Kubernetes tasks as execution backend for jobs. The first parameter must be either a *kubernetes.Clientset or nil to allocate a new one.

func NewLibDRMAASessionManager added in v0.3.0 

func NewLibDRMAASessionManager(dbpath string) (*SessionManager, error)

NewLibDRMAASessionManager creates a new session manager which wraps libdrmaa.so (DRMAA v1) through the Go DRMAA library. Please check out the details of github.com/dgruber/drmaa before using it. Make sure all neccessary paths are set (C header files, LD_LIBRARY_PATH).

func NewLibDRMAASessionManagerWithParams added in v0.3.13 

func NewLibDRMAASessionManagerWithParams(ds interface{}, dbpath string) (*SessionManager, error)

NewLibDRMAASessionManagerWithParams creates a Go DRMAA session manager like NewLibDRMAASessionManager but with additional parameters. The parameters must be of type _libdrmaa.LibDRMAASessionParams_.

func NewMPIOperatorSessionManager added in v0.3.22 

func NewMPIOperatorSessionManager(parameters interface{}, dbpath string) (*SessionManager, error)

NewMPIOperatorSessionManager (TODO) see https://github.com/dgruber/mpioperatortracker

func NewPodmanSessionManager added in v0.3.11 

func NewPodmanSessionManager(ps interface{}, dbpath string) (*SessionManager, error)

NewPodmanSessionManager creates a new session manager for Podman. The first parameter is either nil for using defaults or must be of type _podmantracker.PodmanTrackerParams_.

func NewRemoteSessionManager added in v0.3.11 

func NewRemoteSessionManager(rs interface{}, dbpath string) (*SessionManager, error)

NewRemoteSessionManager create a new session manager for accessing a remote jobtracker server implementation which can be of any backend type.

func NewSingularitySessionManager added in v0.2.0 

func NewSingularitySessionManager(dbpath string) (*SessionManager, error)

NewSingularitySessionManager creates a new session manager creating and maintaining jobs as Singularity containers.

func NewSlurmSessionManager added in v0.2.1 

func NewSlurmSessionManager(dbpath string) (*SessionManager, error)

NewSlurmSessionManager creates a new session manager which wraps the slurm command line for managing jobs.

func NexExternalSessionManager added in v0.3.0 

func NexExternalSessionManager(dbpath string) (*SessionManager, error)

NexExternalSessionManager creates a new external session. This can be used when a JobTrack is implemented outside of the repository. Note that only one ExternalSession is available so it makes sense to add a constant here.

func (*SessionManager) CreateJobSession 

func (sm *SessionManager) CreateJobSession(name, contact string) (drmaa2interface.JobSession, error)

CreateJobSession creates a new JobSession for managing jobs.

func (*SessionManager) CreateReservationSession 

func (sm *SessionManager) CreateReservationSession(name, contact string) (drmaa2interface.ReservationSession, error)

CreateReservationSession creates a new ReservationSession.

func (*SessionManager) DestroyJobSession 

func (sm *SessionManager) DestroyJobSession(name string) error

DestroyJobSession destroys a job session by name.

func (*SessionManager) DestroyReservationSession 

func (sm *SessionManager) DestroyReservationSession(name string) error

DestroyReservationSession removes a reservation session.

func (*SessionManager) GetDrmsName 

func (sm *SessionManager) GetDrmsName() (string, error)

GetDrmsName returns the name of the distributed resource manager.

func (*SessionManager) GetDrmsVersion 

func (sm *SessionManager) GetDrmsVersion() (drmaa2interface.Version, error)

GetDrmsVersion returns the version of the distributed resource manager.

func (*SessionManager) GetJobSessionNames 

func (sm *SessionManager) GetJobSessionNames() ([]string, error)

GetJobSessionNames returns a list of all job sessions.

func (*SessionManager) GetReservationSessionNames 

func (sm *SessionManager) GetReservationSessionNames() ([]string, error)

GetReservationSessionNames returns a list of all reservation sessions.

func (*SessionManager) OpenJobSession 

func (sm *SessionManager) OpenJobSession(name string) (drmaa2interface.JobSession, error)

OpenJobSession creates a new session for managing jobs. The semantic of a job session and the job session name depends on the resource manager.

func (*SessionManager) OpenMonitoringSession 

func (sm *SessionManager) OpenMonitoringSession(sessionName string) (drmaa2interface.MonitoringSession, error)

OpenMonitoringSession opens a session for monitoring jobs.

func (*SessionManager) OpenReservationSession 

func (sm *SessionManager) OpenReservationSession(name string) (drmaa2interface.ReservationSession, error)

OpenReservationSession opens a reservation session.

func (*SessionManager) RegisterEventNotification 

func (sm *SessionManager) RegisterEventNotification() (drmaa2interface.EventChannel, error)

RegisterEventNotification creates an event channel which emits events when the conditions described in the given notification specification are met.

func (*SessionManager) Supports 

func (sm *SessionManager) Supports(capability drmaa2interface.Capability) bool

Supports returns true of false of the given Capability is supported by DRMAA2OS.

type SessionType 

type SessionType int

SessionType represents the selected resource manager. 

const (
	// DefaultSession handles jobs as processes
	DefaultSession SessionType = iota
	// DockerSession manages Docker containers
	DockerSession
	// CloudFoundrySession manages Cloud Foundry application tasks
	CloudFoundrySession
	// KubernetesSession creates Kubernetes jobs
	KubernetesSession
	// SingularitySession manages Singularity containers
	SingularitySession
	// SlurmSession manages slurm jobs
	SlurmSession
	// LibDRMAASession manages jobs through libdrmaa.so
	LibDRMAASession
	// PodmanSession manages jobs as podman containers either locally or remote
	PodmanSession
	// RemoteSession manages jobs over the network through a remote server
	RemoteSession
	// ExternalSession can be used by external JobTracker implementations
	// during development time before they get added here
	ExternalSession
	// GoogleBatchSession manages Google Cloud Batch jobs
	GoogleBatchSession
	// MPIOperatorSession manages jobs as MPI operator jobs on Kubernetes
	MPIOperatorSession
)

Source Files

View all Source files

Directories

Path Synopsis
Dockerfiles
sidecar Module
examples
arrayjob
biocontainers-blast
counter
docker
docker-gpu-texttospeech
frontend
jobinfo
kubernetes2
kubernetes_pytorch_job
libdrmaamonitor
many
multilarity
podman
procmonitor
remote/client
remote/server
simple
singularity
sort
kubernetes Module
libdrmaa Module
libdrmaasessions Module
pkg
d2hlp
extension
helper
jobtracker
jobtracker/cftracker
jobtracker/cftracker/fakes
jobtracker/containerdtracker
jobtracker/dockertracker
jobtracker/kubernetestracker
jobtracker/libdrmaa
jobtracker/podmantracker
jobtracker/remote/client
jobtracker/remote/client/generated
Package genclient provides primitives to interact with the openapi HTTP API.
 Package genclient provides primitives to interact with the openapi HTTP API.
jobtracker/remote/server
jobtracker/remote/server/cmd/testserver
jobtracker/remote/server/generated
Package genserver provides primitives to interact with the openapi HTTP API.
 Package genserver provides primitives to interact with the openapi HTTP API.
jobtracker/simpletracker
jobtracker/simpletrackerfakes
jobtracker/singularity
jobtracker/slurmcli
sidecar
storage
storage/boltstore

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