public async Task <Boolean> CreateSessionAsync(CancellationToken token)
{
Trace.Entering();
// Settings
var configManager = HostContext.GetService <IConfigurationManager>();
_settings = configManager.LoadSettings();
var serverUrl = _settings.ServerUrl;
Trace.Info(_settings);
// Create connection.
Trace.Info("Loading Credentials");
_useMigratedCredentials = !StringUtil.ConvertToBoolean(Environment.GetEnvironmentVariable("GITHUB_ACTIONS_RUNNER_SPSAUTHURL"));
VssCredentials creds = _credMgr.LoadCredentials(_useMigratedCredentials);
var agent = new TaskAgentReference
{
Id = _settings.AgentId,
Name = _settings.AgentName,
Version = BuildConstants.RunnerPackage.Version,
OSDescription = RuntimeInformation.OSDescription,
};
string sessionName = $"{Environment.MachineName ?? "RUNNER"}";
var taskAgentSession = new TaskAgentSession(sessionName, agent);
string errorMessage = string.Empty;
bool encounteringError = false;
var originalCreds = _configStore.GetCredentials();
var migratedCreds = _configStore.GetMigratedCredentials();
if (migratedCreds == null)
{
_useMigratedCredentials = false;
if (originalCreds.Scheme == Constants.Configuration.OAuth)
{
_needToCheckAuthorizationUrlUpdate = true;
}
}
while (true)
{
token.ThrowIfCancellationRequested();
Trace.Info($"Attempt to create session.");
try
{
Trace.Info("Connecting to the Runner Server...");
await _runnerServer.ConnectAsync(new Uri(serverUrl), creds);
Trace.Info("VssConnection created");
_term.WriteLine();
_term.WriteSuccessMessage("Connected to GitHub");
_term.WriteLine();
_session = await _runnerServer.CreateAgentSessionAsync(
_settings.PoolId,
taskAgentSession,
token);
Trace.Info($"Session created.");
if (encounteringError)
{
_term.WriteLine($"{DateTime.UtcNow:u}: Runner reconnected.");
_sessionCreationExceptionTracker.Clear();
encounteringError = false;
}
if (_needToCheckAuthorizationUrlUpdate)
{
// start background task try to get new authorization url
_authorizationUrlMigrationBackgroundTask = GetNewOAuthAuthorizationSetting(token);
}
return(true);
}
catch (OperationCanceledException) when(token.IsCancellationRequested)
{
Trace.Info("Session creation has been cancelled.");
throw;
}
catch (TaskAgentAccessTokenExpiredException)
{
Trace.Info("Runner OAuth token has been revoked. Session creation failed.");
throw;
}
catch (Exception ex)
{
Trace.Error("Catch exception during create session.");
Trace.Error(ex);
if (!IsSessionCreationExceptionRetriable(ex))
{
if (_useMigratedCredentials)
{
// migrated credentials might cause lose permission during permission check,
// we will force to use original credential and try again
_useMigratedCredentials = false;
var reattemptBackoff = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromHours(24), TimeSpan.FromHours(36));
_authorizationUrlRollbackReattemptDelayBackgroundTask = HostContext.Delay(reattemptBackoff, token); // retry migrated creds in 24-36 hours.
creds = _credMgr.LoadCredentials(false);
Trace.Error("Fallback to original credentials and try again.");
}
else
{
_term.WriteError($"Failed to create session. {ex.Message}");
return(false);
}
}
if (!encounteringError) //print the message only on the first error
{
_term.WriteError($"{DateTime.UtcNow:u}: Runner connect error: {ex.Message}. Retrying until reconnected.");
encounteringError = true;
}
Trace.Info("Sleeping for {0} seconds before retrying.", _sessionCreationRetryInterval.TotalSeconds);
await HostContext.Delay(_sessionCreationRetryInterval, token);
}
}
}