Amet13

region = "eu-central-1"
env    = "common"

# https://www.davidc.net/sites/default/subnets/subnets.html
# each subnet ~8190 hosts
# 10.0.192.0/19 is reserved for VPN clients endpoints
vpc_cidr            = "10.0.0.0/16"
vpc_private_subnets = ["10.0.0.0/19", "10.0.32.0/19", "10.0.64.0/19"]
vpc_public_subnets  = ["10.0.96.0/19", "10.0.128.0/19", "10.0.160.0/19"]

Amet13

data "aws_availability_zones" "available" {}

module "vpc" {
  source  = "terraform-aws-modules/vpc/aws"
  version = "3.7.0"

  name = "${var.env}-vpc"
  cidr = var.vpc_cidr
  azs  = data.aws_availability_zones.available.names

Amet13

# Dockerfile added:
FROM node:14

RUN apt update && apt install netcat -y
WORKDIR /usr/src/app
COPY package*.json ./
RUN npm install
COPY . .

EXPOSE 3000

Amet13

$ helm uninstall keda -n keda
$ kubectl delete ns keda
$ kubectl delete ns nginx-demo

Amet13

$ /usr/local/sbin/rabbitmqadmin -H 192.168.2.101 -u demo -p demo \
    purge queue name=demo_queue
queue purged

$ /usr/local/sbin/rabbitmqadmin -H 192.168.2.101 -u demo -p demo \
    list queues
+------------+----------+
|    name    | messages |
+------------+----------+
| demo_queue | 0        |

Amet13

$ kubectl get hpa
NAME                             REFERENCE                     TARGETS     MINPODS   MAXPODS   REPLICAS   AGE
keda-hpa-rabbitmq-scaledobject   Deployment/nginx-deployment   12/3 (avg)  1         5         2          24m

$ kubectl get po
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-66b6c48dd5-24qp7   1/1     Running   1          17m
nginx-deployment-66b6c48dd5-78d54   1/1     Running   0          38s
nginx-deployment-66b6c48dd5-jxtr8   1/1     Running   0          38s
nginx-deployment-66b6c48dd5-sl4p8   1/1     Running   0          38s

Amet13

$ for i in {6..12}; do
    /usr/local/sbin/rabbitmqadmin --host 192.168.2.101 -u demo -p demo \
        publish exchange=amq.default routing_key=demo_queue payload="message ${i}"
done

$ /usr/local/sbin/rabbitmqadmin -H 192.168.2.101 -u demo -p demo \
    list queues
+------------+----------+
|    name    | messages |
+------------+----------+

Amet13

$ kubectl get hpa
NAME                             REFERENCE                     TARGETS     MINPODS   MAXPODS   REPLICAS   AGE
keda-hpa-rabbitmq-scaledobject   Deployment/nginx-deployment   5/3 (avg)   1         5         1          22m

$ kubectl get po
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-66b6c48dd5-24qp7   1/1     Running   0          14m
nginx-deployment-66b6c48dd5-2d4w2   1/1     Running   0          66s

Amet13

$ for i in {1..5}; do
    /usr/local/sbin/rabbitmqadmin --host 192.168.2.101 -u demo -p demo \
        publish exchange=amq.default routing_key=demo_queue payload="message ${i}"
done

$ /usr/local/sbin/rabbitmqadmin -H 192.168.2.101 -u demo -p demo \
    list queues
+------------+----------+
|    name    | messages |
+------------+----------+

Amet13

$ kubectl get scaledobject                      
NAME                    SCALETARGETKIND      SCALETARGETNAME    MIN   MAX   TRIGGERS   AUTHENTICATION                    READY   ACTIVE   AGE
rabbitmq-scaledobject   apps/v1.Deployment   nginx-deployment   1     5     rabbitmq   keda-trigger-auth-rabbitmq-conn   True    False    14m

$ kubectl get po
NAME                                READY   STATUS    RESTARTS   AGE
nginx-deployment-66b6c48dd5-24qp7   1/1     Running   0          3m46s

$ kubectl get hpa
NAME                             REFERENCE                     TARGETS     MINPODS   MAXPODS   REPLICAS   AGE