syz-ci: test images before using them

Boot and minimally test images before declaring them as good
and switching to using them.

If image build/boot/test fails, upload report about this to dashboard.

4 files changed, 21 insertions, 4 deletions

diff --git a/vm/gce/gce.go b/vm/gce/gce.go
index 96cc14e79..792982560 100644
--- a/vm/gce/gce.go
+++ b/vm/gce/gce.go
@@ -364,7 +364,7 @@ func (pool *Pool) waitInstanceBoot(name, ip, sshKey, sshUser, gceKey string) err
 	if err != nil {
 		output = []byte(fmt.Sprintf("failed to get boot output: %v", err))
 	}
-	return fmt.Errorf("can't ssh into the instance\n\n%s", output)
+	return vmimpl.BootError{"can't ssh into the instance", output}
 }
 
 func (pool *Pool) getSerialPortOutput(name, gceKey string) ([]byte, error) {
diff --git a/vm/qemu/qemu.go b/vm/qemu/qemu.go
index 679dcf25e..e3f33554a 100644
--- a/vm/qemu/qemu.go
+++ b/vm/qemu/qemu.go
@@ -373,13 +373,13 @@ func (inst *instance) Boot() error {
 			time.Sleep(time.Second) // wait for any pending output
 			bootOutputStop <- true
 			<-bootOutputStop
-			return fmt.Errorf("qemu stopped:\n%v\n", string(bootOutput))
+			return vmimpl.BootError{"qemu stopped", bootOutput}
 		default:
 		}
 		if time.Since(start) > 10*time.Minute {
 			bootOutputStop <- true
 			<-bootOutputStop
-			return fmt.Errorf("ssh server did not start:\n%v\n", string(bootOutput))
+			return vmimpl.BootError{"ssh server did not start", bootOutput}
 		}
 	}
 	bootOutputStop <- true
diff --git a/vm/vm.go b/vm/vm.go
index b59c0d223..48b68d597 100644
--- a/vm/vm.go
+++ b/vm/vm.go
@@ -37,13 +37,20 @@ type Instance struct {
 	index   int
 }
 
-type Env vmimpl.Env
+type (
+	Env       vmimpl.Env
+	BootError vmimpl.BootError
+)
 
 var (
 	Shutdown   = vmimpl.Shutdown
 	TimeoutErr = vmimpl.TimeoutErr
 )
 
+func (err BootError) Error() string {
+	return fmt.Sprintf("%v\n%s", err.Title, err.Output)
+}
+
 func Create(typ string, env *Env) (*Pool, error) {
 	impl, err := vmimpl.Create(typ, (*vmimpl.Env)(env))
 	if err != nil {
diff --git a/vm/vmimpl/vmimpl.go b/vm/vmimpl/vmimpl.go
index 617f9bc0f..81f798d26 100644
--- a/vm/vmimpl/vmimpl.go
+++ b/vm/vmimpl/vmimpl.go
@@ -56,6 +56,16 @@ type Env struct {
 	Config  []byte // json-serialized VM-type-specific config
 }
 
+// BootError is returned by Pool.Create when VM does not boot.
+type BootError struct {
+	Title  string
+	Output []byte
+}
+
+func (err BootError) Error() string {
+	return fmt.Sprintf("%v\n%s", 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]