fix: update locust files for current locust version

src/loadgenerator/loadgen.sh

@@ -32,4 +32,4 @@ if test $STATUSCODE -ne 200; then
 fi
 
 # else, run loadgen
-locust --host="http://${FRONTEND_ADDR}" --no-web -c "${USERS:-10}" 2>&1
+locust --host="http://${FRONTEND_ADDR}" --headless --users "${USERS:-10}" 2>&1

src/loadgenerator/locustfile.py

@@ -15,7 +15,7 @@
 # limitations under the License.
 
 import random
-from locust import HttpLocust, TaskSet, between
+from locust import HttpUser, between, task
 
 products = [
 	'0PUK6V6EV0',
@@ -26,31 +26,40 @@ products = [
 	'9SIQT8TOJO',
 	'L9ECAV7KIM',
 	'LS4PSXUNUM',
-    'OLJCESPC7Z']
+	'OLJCESPC7Z'
+]
 
-def index(l):
+class MyUser(HttpUser):
+	wait_time = between(5, 15)
+
+	@task(1)
+	def index(l):
 		l.client.get("/")
 
-def setCurrency(l):
+	@task(2)
+	def setCurrency(l):
 		currencies = ['EUR', 'USD', 'JPY', 'CAD']
 		l.client.post("/setCurrency",
 			{'currency_code': random.choice(currencies)})
 
-def browseProduct(l):
+	@task(10)
+	def browseProduct(l):
 		l.client.get("/product/" + random.choice(products))
 
-def viewCart(l):
+	@task(3)
+	def viewCart(l):
 		l.client.get("/cart")
 
-def addToCart(l):
+	@task(2)
+	def addToCart(l):
 		product = random.choice(products)
 		l.client.get("/product/" + product)
 		l.client.post("/cart", {
 			'product_id': product,
 			'quantity': random.choice([1,2,3,4,5,10])})
 
-def checkout(l):
-    addToCart(l)
+	@task(1)
+	def checkout(l):
 		l.client.post("/cart/checkout", {
 			'email': 'someone@example.com',
 			'street_address': '1600 Amphitheatre Parkway',
@@ -64,18 +73,3 @@ def checkout(l):
 			'credit_card_cvv': '672',
 		})
 
-class UserBehavior(TaskSet):
-
-    def on_start(self):
-        index(self)
-
-    tasks = {index: 1,
-        setCurrency: 2,
-        browseProduct: 10,
-        addToCart: 2,
-        viewCart: 3,
-        checkout: 1}
-
-class WebsiteUser(HttpLocust):
-    task_set = UserBehavior
-    wait_time = between(1, 10)