Minor improvements

* Set minimum number of pool instances to 2
* Improve logging of sync reasons
* Improve logging of a new pool role

pkg/cluster/cluster.go

@@ -1240,7 +1240,7 @@ func (c *Cluster) needSyncConnPoolSpecs(oldSpec, newSpec *acidv1.ConnectionPool)
 	}
 
 	for _, change := range changelog {
-		msg := fmt.Sprintf("%s %+v from %s to %s",
+		msg := fmt.Sprintf("%s %+v from '%+v' to '%+v'",
 			change.Type, change.Path, change.From, change.To)
 		reasons = append(reasons, msg)
 	}

pkg/cluster/k8sres.go

@@ -2053,6 +2053,13 @@ func (c *Cluster) generateConnPoolDeployment(spec *acidv1.PostgresSpec) (
 			k8sutil.Int32ToPointer(1))
 	}
 
+	if *numberOfInstances < constants.ConnPoolMinInstances {
+		msg := "Adjusted number of connection pool instances from %d to %d"
+		c.logger.Warningf(msg, numberOfInstances, constants.ConnPoolMinInstances)
+
+		*numberOfInstances = constants.ConnPoolMinInstances
+	}
+
 	if err != nil {
 		return nil, err
 	}

pkg/cluster/sync.go

@@ -727,7 +727,7 @@ func (c *Cluster) syncConnectionPoolWorker(oldSpec, newSpec *acidv1.Postgresql)
 		defaultsSync, defaultsReason := c.needSyncConnPoolDefaults(newConnPool, deployment)
 		reason := append(specReason, defaultsReason...)
 		if specSync || defaultsSync {
-			c.logger.Infof("Update connection pool deployment %s, reason: %s",
+			c.logger.Infof("Update connection pool deployment %s, reason: %+v",
 				c.connPoolName(), reason)
 
 			newDeploymentSpec, err := c.generateConnPoolDeployment(&newSpec.Spec)