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manager.go
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/
manager.go
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package cluster
import (
"fmt"
"sync"
lifecycle "github.com/boz/go-lifecycle"
"github.com/ovrclk/akash/provider/event"
"github.com/ovrclk/akash/provider/session"
"github.com/ovrclk/akash/types"
"github.com/tendermint/tendermint/libs/log"
)
type deploymentState string
const (
dsDeployActive deploymentState = "deploy-active"
dsDeployPending = "deploy-pending"
dsDeployComplete = "deploy-complete"
dsTeardownActive = "teardown-active"
dsTeardownPending = "teardown-pending"
dsTeardownComplete = "teardown-complete"
)
type deploymentManager struct {
bus event.Bus
client Client
session session.Session
state deploymentState
lease types.LeaseID
mgroup *types.ManifestGroup
monitor *deploymentMonitor
wg sync.WaitGroup
updatech chan *types.ManifestGroup
teardownch chan struct{}
log log.Logger
lc lifecycle.Lifecycle
}
func newDeploymentManager(s *service, lease types.LeaseID, mgroup *types.ManifestGroup) *deploymentManager {
log := s.log.With("cmp", "deployment-manager",
"lease", lease, "manifest-group", mgroup.Name)
dm := &deploymentManager{
bus: s.bus,
client: s.client,
session: s.session,
state: dsDeployActive,
lease: lease,
mgroup: mgroup,
wg: sync.WaitGroup{},
updatech: make(chan *types.ManifestGroup),
teardownch: make(chan struct{}),
log: log,
lc: lifecycle.New(),
}
go dm.lc.WatchChannel(s.lc.ShuttingDown())
go dm.run()
go func() {
<-dm.lc.Done()
s.managerch <- dm
}()
return dm
}
func (dm *deploymentManager) update(mgroup *types.ManifestGroup) error {
select {
case dm.updatech <- mgroup:
return nil
case <-dm.lc.ShuttingDown():
return fmt.Errorf("not running")
}
}
func (dm *deploymentManager) teardown() error {
select {
case dm.teardownch <- struct{}{}:
return nil
case <-dm.lc.ShuttingDown():
return fmt.Errorf("not running")
}
}
func (dm *deploymentManager) run() {
defer dm.lc.ShutdownCompleted()
runch := dm.startDeploy()
loop:
for {
select {
case err := <-dm.lc.ShutdownRequest():
dm.lc.ShutdownInitiated(err)
break loop
case mgroup := <-dm.updatech:
dm.mgroup = mgroup
switch dm.state {
case dsDeployActive:
dm.mgroup = mgroup
dm.state = dsDeployPending
case dsDeployPending:
dm.mgroup = mgroup
case dsDeployComplete:
dm.mgroup = mgroup
// start update
runch = dm.startDeploy()
case dsTeardownActive, dsTeardownPending, dsTeardownComplete:
}
case result := <-runch:
runch = nil
if result != nil {
dm.log.Error("execution error", "state", dm.state, "err", result)
}
switch dm.state {
case dsDeployActive:
dm.log.Debug("deploy complete")
dm.state = dsDeployComplete
dm.startMonitor()
case dsDeployPending:
// start update
runch = dm.startDeploy()
case dsDeployComplete:
panic(fmt.Errorf("INVALID STATE: runch read on %v", dm.state))
case dsTeardownActive:
dm.state = dsTeardownComplete
break loop
case dsTeardownPending:
// start teardown
runch = dm.startTeardown()
case dsTeardownComplete:
panic(fmt.Errorf("INVALID STATE: runch read on %v", dm.state))
}
case <-dm.teardownch:
dm.log.Debug("teardown request")
dm.stopMonitor()
switch dm.state {
case dsDeployActive:
dm.state = dsTeardownPending
case dsDeployPending:
dm.state = dsTeardownPending
case dsDeployComplete:
// start teardown
runch = dm.startTeardown()
case dsTeardownActive, dsTeardownPending, dsTeardownComplete:
}
}
}
if runch != nil {
<-runch
}
dm.wg.Wait()
}
func (dm *deploymentManager) startMonitor() {
dm.wg.Add(1)
dm.monitor = newDeploymentMonitor(dm)
go func(m *deploymentMonitor) {
defer dm.wg.Done()
<-m.done()
}(dm.monitor)
}
func (dm *deploymentManager) stopMonitor() {
if dm.monitor != nil {
dm.monitor.shutdown()
}
}
func (dm *deploymentManager) startDeploy() <-chan error {
dm.stopMonitor()
dm.state = dsDeployActive
return dm.do(dm.doDeploy)
}
func (dm *deploymentManager) startTeardown() <-chan error {
dm.stopMonitor()
dm.state = dsTeardownActive
return dm.do(dm.doTeardown)
}
func (dm *deploymentManager) doDeploy() error {
return dm.client.Deploy(dm.lease, dm.mgroup)
}
func (dm *deploymentManager) doTeardown() error {
return dm.client.TeardownLease(dm.lease)
}
func (dm *deploymentManager) do(fn func() error) <-chan error {
ch := make(chan error, 1)
go func() {
ch <- fn()
}()
return ch
}