public void SetNextState(ServiceFabricAutopilotAgentState nextState, bool toIgnoreStateTransitionWhenStopping = true)
{
lock (this.StatusLock)
{
if (toIgnoreStateTransitionWhenStopping && this.State < ServiceFabricAutopilotAgentState.Started)
{
TextLogger.LogVerbose("Application is stopping. Ignore state transition request to {0}.", nextState);
return;
}
TextLogger.LogInfo("State transition: {0} -> {1}", this.State, nextState);
this.State = nextState;
}
}
private void RunStateMachine()
{
bool toRunStateMachineCore = false;
lock (this.agentStatus.StatusLock)
{
if (this.agentStatus.State < ServiceFabricAutopilotAgentState.Started)
{
return;
}
TextLogger.LogVerbose("RunStateMachine : {0}.", this.agentStatus);
if (this.agentStatus.LastFailedDeploymentAction != DateTime.MinValue && (DateTime.UtcNow - this.agentStatus.LastFailedDeploymentAction).TotalSeconds < ConfigurationManager.DeploymentRetryIntervalSeconds)
{
return;
}
// Note that when a deployer operation (node configuration creation or update) fails, it would be retried based on the same cluster manifest (bootstrap or current).
// I.e a retry would happen even when a previous operation failed with the same cluster manifest.
if ((this.agentStatus.State > ServiceFabricAutopilotAgentState.Started && agentStatus.State < ServiceFabricAutopilotAgentState.DiscoveringTopology) ||
(this.agentStatus.State == ServiceFabricAutopilotAgentState.DiscoveringTopology && ConfigurationManager.BootstrapClusterManifestLocation != BootstrapClusterManifestLocationType.NotReady) ||
(this.agentStatus.State > ServiceFabricAutopilotAgentState.DiscoveringTopology && agentStatus.State < ServiceFabricAutopilotAgentState.NodeStarted) ||
(this.agentStatus.State == ServiceFabricAutopilotAgentState.NodeStarted && !this.agentStatus.ExpectedTopologyRunning))
{
TextLogger.LogInfo(
"RunStateMachine: current agent state necessitates RunStateMachineCore. Agent status = {0}, ExpectedTopologyRunning = {1}, LastFailedDeploymentAction = {2}, BootstrapClusterManifestLocation = {3}.",
this.agentStatus.State,
this.agentStatus.ExpectedTopologyRunning,
this.agentStatus.LastFailedDeploymentAction,
ConfigurationManager.BootstrapClusterManifestLocation);
toRunStateMachineCore = true;
}
}
if (toRunStateMachineCore)
{
bool coreStateMachineRunResult;
ServiceFabricAutopilotAgentState currentState;
do
{
currentState = this.agentStatus.GetCurrentState();
if (currentState < ServiceFabricAutopilotAgentState.Started)
{
return;
}
coreStateMachineRunResult = this.RunStateMachineCore(currentState);
TextLogger.LogInfo("RunStateMachine: RunStateMachineCore completed with result {0}. State prior to the run : {1}.", coreStateMachineRunResult, currentState);
if (!coreStateMachineRunResult)
{
lock (agentStatus.StatusLock)
{
this.agentStatus.LastFailedDeploymentAction = DateTime.UtcNow;
}
}
else
{
lock (agentStatus.StatusLock)
{
this.agentStatus.LastFailedDeploymentAction = DateTime.MinValue;
}
}
currentState = this.agentStatus.GetCurrentState();
}while (currentState > ServiceFabricAutopilotAgentState.Started && currentState < ServiceFabricAutopilotAgentState.NodeStarted && coreStateMachineRunResult);
}
}