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Move creation of children into daemon initialize method

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This commit is contained in:
Brian Picciano 2024-07-20 11:07:11 +02:00
parent 7aa11ebe29
commit c94f8e3475
3 changed files with 72 additions and 167 deletions
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2
go/cmd/entrypoint/daemon.go
View File

@ -59,7 +59,7 @@ var subCmdDaemon = subCmd{
}
daemonInst, err := daemon.NewDaemon(
logger, daemonConfig, envBinDirPath, nil,
ctx, logger, daemonConfig, envBinDirPath, nil,
)
if err != nil {
return fmt.Errorf("starting daemon: %w", err)

16
go/daemon/children.go
View File

@ -71,15 +71,7 @@ func NewChildren(
)
if initErr != nil {
logger.Warn(ctx, "failed to initialize Children, shutting down child processes", err)
if err := c.Shutdown(); err != nil {
panic(fmt.Sprintf(
"failed to shut down child processes after initialization"+
" error, there may be zombie children leftover."+
" Original error: %v",
initErr,
))
}
c.Shutdown()
return nil, initErr
}
@ -114,10 +106,6 @@ func (c *Children) RestartNebula(hostBootstrap bootstrap.Bootstrap) error {
// Shutdown blocks until all child processes have gracefully shut themselves
// down.
//
// If this returns an error then it's possible that child processes are
// still running and are no longer managed.
func (c *Children) Shutdown() error {
func (c *Children) Shutdown() {
c.pmux.Stop()
return nil
}

199
go/daemon/daemon.go
View File

@ -181,7 +181,11 @@ type daemon struct {
// ErrInitializing, except Shutdown which will block until initialization is
// canceled.
func NewDaemon(
logger *mlog.Logger, daemonConfig Config, envBinDirPath string, opts *Opts,
ctx context.Context,
logger *mlog.Logger,
daemonConfig Config,
envBinDirPath string,
opts *Opts,
) (
Daemon, error,
) {
@ -220,21 +224,21 @@ func NewDaemon(
return nil, fmt.Errorf(
"loading bootstrap from %q: %w", bootstrapFilePath, err,
)
} else if err := d.initialize(currBootstrap, nil); err != nil {
} else if err := d.initialize(ctx, currBootstrap); err != nil {
return nil, fmt.Errorf("initializing with bootstrap: %w", err)
}
return d, nil
}
// initialize must be called with d.l write lock held, _but_ the lock should be
// released just after initialize returns.
//
// readyCh will be written to everytime daemon changes state to daemonStateOk,
// unless it is nil or blocks.
// initialize must be called with d.l write lock held, but it will unlock the
// lock itself. Once initialize returns successfully the d.l write lock should
// not be held again, except by the reloadLoop.
func (d *daemon) initialize(
currBootstrap bootstrap.Bootstrap, readyCh chan<- struct{},
ctx context.Context, currBootstrap bootstrap.Bootstrap,
) error {
defer d.l.Unlock()
// we update this Host's data using whatever configuration has been provided
// by the daemon config. This way the daemon has the most up-to-date
// possible bootstrap. This updated bootstrap will later get updated in
@ -254,6 +258,31 @@ func (d *daemon) initialize(
d.currBootstrap = currBootstrap
d.state = daemonStateInitializing
d.logger.Info(ctx, "Creating child processes")
d.children, err = NewChildren(
ctx,
d.logger.WithNamespace("children"),
d.envBinDirPath,
d.secretsStore,
d.daemonConfig,
d.garageAdminToken,
currBootstrap,
d.opts,
)
if err != nil {
return fmt.Errorf("creating child processes: %w", err)
}
d.logger.Info(ctx, "Child processes created")
if err := d.postInit(ctx); err != nil {
d.logger.Error(ctx, "Post-initialization failed, stopping child processes", err)
d.children.Shutdown()
return fmt.Errorf("performing post-initialization: %w", err)
}
d.state = daemonStateOk
ctx, cancel := context.WithCancel(context.Background())
d.wg.Add(1)
go func() {
@ -265,7 +294,7 @@ func (d *daemon) initialize(
d.wg.Add(1)
go func() {
defer d.wg.Done()
d.restartLoop(ctx, readyCh)
d.reloadLoop(ctx)
d.logger.Debug(ctx, "Daemon restart loop stopped")
}()
@ -340,23 +369,13 @@ func (d *daemon) reload(
return errors.Join(errs...)
}
func (d *daemon) postInit(ctx context.Context) bool {
func (d *daemon) postInit(ctx context.Context) error {
if len(d.daemonConfig.Storage.Allocations) > 0 {
if !until(
ctx,
d.logger,
"Applying garage layout",
func(ctx context.Context) error {
return garageApplyLayout(
ctx,
d.logger,
d.daemonConfig,
d.garageAdminToken,
d.currBootstrap,
)
},
) {
return false
d.logger.Info(ctx, "Applying garage layout")
if err := garageApplyLayout(
ctx, d.logger, d.daemonConfig, d.garageAdminToken, d.currBootstrap,
); err != nil {
return fmt.Errorf("applying garage layout: %w", err)
}
}
@ -367,11 +386,7 @@ func (d *daemon) postInit(ctx context.Context) bool {
// manage it at the moment.
_, err := getGarageS3APIGlobalBucketCredentials(ctx, d.secretsStore)
if errors.Is(err, secrets.ErrNotFound) {
if !until(
ctx,
d.logger,
"Initializing garage shared global bucket",
func(ctx context.Context) error {
d.logger.Info(ctx, "Initializing garage shared global bucket")
garageGlobalBucketCreds, err := garageInitializeGlobalBucket(
ctx,
d.logger,
@ -389,97 +404,18 @@ func (d *daemon) postInit(ctx context.Context) bool {
if err != nil {
return fmt.Errorf("storing global bucket creds: %w", err)
}
}
d.logger.Info(ctx, "Updating host info in garage")
err = d.putGarageBoostrapHost(ctx, d.logger, d.currBootstrap)
if err != nil {
return fmt.Errorf("updating host info in garage: %w", err)
}
return nil
},
) {
return false
}
}
if !until(
ctx,
d.logger,
"Updating host info in garage",
func(ctx context.Context) error {
return d.putGarageBoostrapHost(ctx, d.logger, d.currBootstrap)
},
) {
return false
}
return true
}
func (d *daemon) restartLoop(
ctx context.Context,
readyCh chan<- struct{},
) {
wait := func(d time.Duration) bool {
select {
case <-ctx.Done():
return false
case <-time.After(d):
return true
}
}
ready := func() {
select {
case readyCh <- struct{}{}:
default:
}
readyCh = nil
}
var (
children *Children
err error
)
for {
d.logger.Info(ctx, "Creating child processes")
// TODO this could probably get moved outside of restartLoop, and into
// initialize. If it fails the error can get passed up to the caller and
// no changes can be made.
children, err = NewChildren(
ctx,
d.logger.WithNamespace("children"),
d.envBinDirPath,
d.secretsStore,
d.daemonConfig,
d.garageAdminToken,
d.currBootstrap,
d.opts,
)
if errors.Is(err, context.Canceled) {
return
} else if err != nil {
d.logger.Error(ctx, "failed to initialize child processes", err)
if !wait(1 * time.Second) {
return
}
continue
}
d.logger.Info(ctx, "Child processes created")
d.l.Lock()
d.children = children
d.l.Unlock()
if !d.postInit(ctx) {
return
}
d.l.Lock()
d.state = daemonStateOk
d.l.Unlock()
ready()
break
}
func (d *daemon) reloadLoop(ctx context.Context) {
ticker := time.NewTicker(3 * time.Minute)
defer ticker.Stop()
@ -501,8 +437,6 @@ func (d *daemon) restartLoop(
d.logger.Error(ctx, "Reloading with new host data failed", err)
continue
}
ready()
}
}
}
@ -560,20 +494,12 @@ func (d *daemon) CreateNetwork(
)
}
readyCh := make(chan struct{}, 1)
err = d.initialize(hostBootstrap, readyCh)
d.l.Unlock()
// initialize will unlock d.l
err = d.initialize(ctx, hostBootstrap)
if err != nil {
return fmt.Errorf("initializing daemon: %w", err)
}
select {
case <-readyCh:
case <-ctx.Done():
return ctx.Err()
}
return nil
}
@ -587,26 +513,19 @@ func (d *daemon) JoinNetwork(
return ErrAlreadyJoined
}
readyCh := make(chan struct{}, 1)
err := secrets.Import(ctx, d.secretsStore, newBootstrap.Secrets)
if err != nil {
d.l.Unlock()
return fmt.Errorf("importing secrets: %w", err)
}
err = d.initialize(newBootstrap.Bootstrap, readyCh)
d.l.Unlock()
// initialize will unlock d.l
err = d.initialize(ctx, newBootstrap.Bootstrap)
if err != nil {
return fmt.Errorf("initializing daemon: %w", err)
}
select {
case <-readyCh:
return nil
case <-ctx.Done():
return ctx.Err()
}
}
func (d *daemon) GetBootstrap(ctx context.Context) (bootstrap.Bootstrap, error) {
@ -763,9 +682,7 @@ func (d *daemon) Shutdown() error {
d.state = daemonStateShutdown
if d.children != nil {
if err := d.children.Shutdown(); err != nil {
return fmt.Errorf("shutting down children: %w", err)
}
d.children.Shutdown()
}
return nil