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state.go
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/*
* === This file is part of ALICE O² ===
*
* Copyright 2017-2018 CERN and copyright holders of ALICE O².
* Author: Teo Mrnjavac <teo.mrnjavac@cern.ch>
*
* Portions from examples in <https://github.com/mesos/mesos-go>:
* Copyright 2013-2015, Mesosphere, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*ù
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* In applying this license CERN does not waive the privileges and
* immunities granted to it by virtue of its status as an
* Intergovernmental Organization or submit itself to any jurisdiction.
*/
package core
import (
"math/rand"
"time"
"sync"
"github.com/mesos/mesos-go/api/v1/lib"
"github.com/mesos/mesos-go/api/v1/lib/backoff"
"github.com/mesos/mesos-go/api/v1/lib/scheduler/calls"
"github.com/looplab/fsm"
"github.com/AliceO2Group/Control/core/environment"
"github.com/AliceO2Group/Control/configuration"
"encoding/json"
"github.com/AliceO2Group/Control/core/controlcommands"
"context"
"github.com/AliceO2Group/Control/core/task"
)
func newInternalState(cfg Config, shutdown func()) (*internalState, error) {
metricsAPI := initMetrics(cfg)
executorInfo, err := prepareExecutorInfo(
cfg.executor,
cfg.mesosExecutorImage,
buildWantsExecutorResources(cfg),
cfg.mesosJobRestartDelay,
metricsAPI,
)
if err != nil {
return nil, err
}
creds, err := loadCredentials(cfg.mesosCredentials)
if err != nil {
return nil, err
}
cfgman, err := configuration.NewConfiguration(cfg.configurationUri)
if cfg.veryVerbose {
cfgDump, err := cfgman.GetRecursive("o2/control")
if err != nil {
log.WithError(err).Fatal("cannot retrieve configuration")
return nil, err
}
cfgBytes, err := json.MarshalIndent(cfgDump,"", "\t")
if err != nil {
log.WithError(err).Fatal("cannot marshal configuration dump")
return nil, err
}
log.WithField("data", string(cfgBytes)).Debug("configuration dump")
}
if err != nil {
return nil, err
}
resourceOffersDone := make(chan task.DeploymentMap)
tasksToDeploy := make(chan task.Descriptors)
reviveOffersTrg := make(chan struct{})
state := &internalState{
config: cfg,
reviveTokens: backoff.BurstNotifier(cfg.mesosReviveBurst, cfg.mesosReviveWait, cfg.mesosReviveWait, nil),
resourceOffersDone: resourceOffersDone,
tasksToDeploy: tasksToDeploy,
reviveOffersTrg: reviveOffersTrg,
wantsTaskResources: mesos.Resources{},
executor: executorInfo,
metricsAPI: metricsAPI,
cli: buildHTTPSched(cfg, creds),
random: rand.New(rand.NewSource(time.Now().Unix())),
shutdown: shutdown,
environments: nil,
cfgman: cfgman,
}
state.servent = controlcommands.NewServent(
func(command controlcommands.MesosCommand, receiver controlcommands.MesosCommandTarget) error {
return SendCommand(context.TODO(), state, command, receiver)
},
)
state.commandqueue = controlcommands.NewCommandQueue(state.servent)
taskman := task.NewManager(cfgman, resourceOffersDone,
tasksToDeploy, reviveOffersTrg, state.commandqueue)
err = taskman.RefreshClasses()
if err != nil {
log.WithField("error", err).Warning("bad configuration, some task templates were not refreshed")
}
state.taskman = taskman
state.environments = environment.NewEnvManager(state.taskman, state.cfgman)
state.commandqueue.Start() // FIXME: there should be 1 cq per env
return state, nil
}
type internalState struct {
sync.RWMutex
// needs locking:
wantsTaskResources mesos.Resources
tasksLaunched int
tasksFinished int
err error
// not used in multiple goroutines:
executor *mesos.ExecutorInfo
reviveTokens <-chan struct{}
resourceOffersDone chan task.DeploymentMap
tasksToDeploy chan task.Descriptors
reviveOffersTrg chan struct{}
random *rand.Rand
// shouldn't change at runtime, so thread safe:
role string
cli calls.Caller
config Config
shutdown func()
// uses prometheus counters, so thread safe
metricsAPI *metricsAPI
// uses locks, so thread safe
sm *fsm.FSM
environments *environment.Manager
taskman *task.Manager
cfgman configuration.Configuration
commandqueue *controlcommands.CommandQueue
servent *controlcommands.Servent
}