Update canary-auto-promote feature addition based on feedback.

README.md

@@ -59,7 +59,7 @@ Levant supports a number of command line arguments which provide control over th
 
 * **-address** (string: "http://localhost:4646") The HTTP API endpoint for Nomad where all calls will be made.
 
-* **-canary-auto-promote** (int: 0)
+* **-canary-auto-promote** (int: 0) The time period in seconds that Levant should wait for before attempting to promote a canary deployment.
 
 * **-log-level** (string: "INFO") The level at which Levant will log to. Valid values are DEBUG, INFO, WARNING, ERROR and FATAL.
 

levant/deploy.go

@@ -167,7 +167,7 @@ func (c *nomadClient) canaryAutoPromote(depID string, waitTime int, shutdownChan
 				waitTime, depID)
 
 			// Check the deployment is healthy before promoting.
-			if healthly := c.checkCanaryDeploymentHealth(depID); !healthly {
+			if healthy := c.checkCanaryDeploymentHealth(depID); !healthy {
 				logging.Error("levant/deploy: the canary deployment %s has unhealthy allocations, unable to promote", depID)
 				close(deploymentChan)
 				return
@@ -213,7 +213,7 @@ func (c *nomadClient) checkCanaryDeploymentHealth(depID string) (healthy bool) {
 
 	// If zero unhealthy tasks were found, continue with the auto promotion.
 	if unhealthy == 0 {
-		logging.Info("levant/deploy: deployment %s has 0 unhealthy allocations", depID)
+		logging.Debug("levant/deploy: deployment %s has 0 unhealthy allocations", depID)
 		healthy = true
 	}