You can create your cluster using AWS CLI by the help of the following command:-
C:\Users\priyj_kumar\Desktop>aws redshift create-cluster --node-type dc2.large --number-of-nodes 1 --master-username adminuser --master-user-password password123 --cluster-identifier mydemocluster
You will get a log stating your cluster creation like this:-
{
   "Cluster": {
      "NodeType": "dc2.large",
      "ClusterVersion": "1.0",
      "PubliclyAccessible": "true",
      "MasterUsername": "adminuser",
      "ClusterParameterGroups": [
         {
            "ParameterApplyStatus": "in-sync",
            "ParameterGroupName": "default.redshift-1.0"
         } ],
      "ClusterSecurityGroups": [
         {
            "Status": "active",
            "ClusterSecurityGroupName": "default"
         } ],
      "AllowVersionUpgrade": true,
      "VpcSecurityGroups": \[],
      "PreferredMaintenanceWindow": "sat:03:30-sat:04:00",
      "AutomatedSnapshotRetentionPeriod": 1,
      "ClusterStatus": "creating",
      "ClusterIdentifier": "mydemocluster",
      "DBName": "dev",
      "NumberOfNodes": 1,
      "PendingModifiedValues": {
         "MasterUserPassword": "\****"
      }
   },
   "ResponseMetadata": {
      "RequestId": "7cf4*******************83f07"
   }
}