dashboard/app: add manager monitoring

Make it possible to monitor health and operation
of all managers from dashboard.
1. Notify dashboard about internal syz-ci errors
   (currently we don't know when/if they happen).
2. Send statistics from managers to dashboard.

2 files changed, 7 insertions, 6 deletions

diff --git a/vm/vm.go b/vm/vm.go
index 48b68d597..519859a5e 100644
--- a/vm/vm.go
+++ b/vm/vm.go
@@ -37,18 +37,15 @@ type Instance struct {
 	index   int
 }
 
-type (
-	Env       vmimpl.Env
-	BootError vmimpl.BootError
-)
+type Env vmimpl.Env
 
 var (
 	Shutdown   = vmimpl.Shutdown
 	TimeoutErr = vmimpl.TimeoutErr
 )
 
-func (err BootError) Error() string {
-	return fmt.Sprintf("%v\n%s", err.Title, err.Output)
+type BootErrorer interface {
+	BootError() (string, []byte)
 }
 
 func Create(typ string, env *Env) (*Pool, error) {
diff --git a/vm/vmimpl/vmimpl.go b/vm/vmimpl/vmimpl.go
index 81f798d26..2e3833d89 100644
--- a/vm/vmimpl/vmimpl.go
+++ b/vm/vmimpl/vmimpl.go
@@ -66,6 +66,10 @@ func (err BootError) Error() string {
 	return fmt.Sprintf("%v\n%s", err.Title, err.Output)
 }
 
+func (err BootError) BootError() (string, []byte) {
+	return err.Title, err.Output
+}
+
 // Create creates a VM type that can be used to create individual VMs.
 func Create(typ string, env *Env) (Pool, error) {
 	ctor := ctors[typ]