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lntest: wait for valid tls cert and macaroon files

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This changes the wait during node connection to check both for the
existance as well as for the validity of the tls cert and macaroon
files.

This ensures that nodes in the process of starting up don't inadvertedly
cause a connection error due to not yet having written the entire file.
This commit is contained in:
Matheus Degiovani 2020-04-20 12:09:05 -03:00
parent 9f036b4310
commit 91538884da
1 changed files with 33 additions and 47 deletions
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80
lntest/node.go
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@ -689,28 +689,26 @@ func (hn *HarnessNode) writePidFile() error {
func (hn *HarnessNode) ReadMacaroon(macPath string, timeout time.Duration) (
*macaroon.Macaroon, error) {
// Wait until macaroon file is created before using it.
macTimeout := time.After(timeout)
for !fileExists(macPath) {
select {
case <-macTimeout:
return nil, fmt.Errorf("timeout waiting for macaroon "+
"file %s to be created after %d seconds",
macPath, timeout/time.Second)
case <-time.After(100 * time.Millisecond):
// Wait until macaroon file is created and has valid content before
// using it.
var mac *macaroon.Macaroon
err := wait.NoError(func() error {
macBytes, err := ioutil.ReadFile(macPath)
if err != nil {
return fmt.Errorf("error reading macaroon file: %v", err)
}
}
// Now that we know the file exists, read it and return the macaroon.
macBytes, err := ioutil.ReadFile(macPath)
if err != nil {
return nil, err
}
mac := &macaroon.Macaroon{}
if err = mac.UnmarshalBinary(macBytes); err != nil {
return nil, err
}
return mac, nil
newMac := &macaroon.Macaroon{}
if err = newMac.UnmarshalBinary(macBytes); err != nil {
return fmt.Errorf("error unmarshalling macaroon "+
"file: %v", err)
}
mac = newMac
return nil
}, timeout)
return mac, err
}
// ConnectRPCWithMacaroon uses the TLS certificate and given macaroon to
@ -718,25 +716,24 @@ func (hn *HarnessNode) ReadMacaroon(macPath string, timeout time.Duration) (
func (hn *HarnessNode) ConnectRPCWithMacaroon(mac *macaroon.Macaroon) (
*grpc.ClientConn, error) {
// Wait until TLS certificate is created before using it, up to 30 sec.
tlsTimeout := time.After(DefaultTimeout)
for !fileExists(hn.Cfg.TLSCertPath) {
select {
case <-tlsTimeout:
return nil, fmt.Errorf("timeout waiting for TLS cert " +
"file to be created")
case <-time.After(100 * time.Millisecond):
}
// Wait until TLS certificate is created and has valid content before
// using it, up to 30 sec.
var tlsCreds credentials.TransportCredentials
err := wait.NoError(func() error {
var err error
tlsCreds, err = credentials.NewClientTLSFromFile(
hn.Cfg.TLSCertPath, "",
)
return err
}, DefaultTimeout)
if err != nil {
return nil, fmt.Errorf("error reading TLS cert: %v", err)
}
opts := []grpc.DialOption{grpc.WithBlock()}
tlsCreds, err := credentials.NewClientTLSFromFile(
hn.Cfg.TLSCertPath, "",
)
if err != nil {
return nil, err
opts := []grpc.DialOption{
grpc.WithBlock(),
grpc.WithTransportCredentials(tlsCreds),
}
opts = append(opts, grpc.WithTransportCredentials(tlsCreds))
ctx, cancel := context.WithTimeout(context.Background(), DefaultTimeout)
defer cancel()
@ -1159,14 +1156,3 @@ func (hn *HarnessNode) WaitForBalance(expectedBalance btcutil.Amount, confirmed
return nil
}
// fileExists reports whether the named file or directory exists.
// This function is taken from https://github.com/btcsuite/btcd
func fileExists(name string) bool {
if _, err := os.Stat(name); err != nil {
if os.IsNotExist(err) {
return false
}
}
return true
}