Instructions for operating the kubernetes.click cluster

kubernetes.click-ops.md

kubernetes.click-ops

1. Generalizing to your own Kubernetes cluster
2. A note on non-standard kops and nodeup binaries
3. Installing required binaries
4. Setting up "permanent" resources
5. Creating the cluster
6. Administering the cluster
7. Other operations on the cluster
8. Updating your local state
9. Deleting the cluster
10. Stopping the cluster
11. Restarting the cluster
12. Setting up the developer sandbox
13. Enabling RBAC
14. Creating and locking down the dev namespace
15. Creating users in the developer sandbox
16. (Optional) Push the developer self-registration application
17. Appendix
18. system-access.yml
19. dev-access.yml
20. dev-kube-config.yml
21. nodeport-ingress.tf

Generalizing to your own Kubernetes cluster

While the instructions below are specific operating the "kubernetes.click" cluster, you can use these instructions to operate your own cluster on some other domain. If you purchase the domain through Amazon Route 53 in your own AWS account, then all of the below should apply, replacing "kubernetes.click" with whatever your domain is. If you want to use a domain that you've purchased outside of Route 53 and/or you want to use a subdomain of a domain you own, this is possible too, just make sure:

1. You have a Route 53 Hosted Zone for the (sub)domain you want to use
2. Copy the appropriate NS record:
3. For a subdomain, copy the NS record in the Route 53 Hosted Zone for that subdomain and copy it to an NS record in the parent domain, pointing to the subdomain
4. For a root domain purchased outside of Route 53, copy the NS record in the Route 53 Hosted Zone for that domain to an NS record at your domain registrar

A note on non-standard kops and nodeup binaries

In order to:

• get the Kuberentes APIs for role-based access control to work,
• restrict the port range for NodePort Services, and
• ensure the kubedns addon can always get scheduled on the master (despite lack of rescheduler),

the following instructions refer to a kops binary for Mac and a nodeup binary for Linux built from this SHA. They are available for download from a public S3 bucket and their S3 URLs will be referenced in the instructions below.

Installing required binaries

1. Install kubectl: brew install kubectl
2. Install kops:

wget https://s3.amazonaws.com/amitkgupta-kops-binaries/kops
chmod +x kops
mv kops /usr/local/bin/kops

1. Install terraform: brew install terraform
2. Install aws CLI: brew install awscli

Setting up "permanent" resources

You may wish to create and destroy the cluster many times, but there are certain resources such as an IAM user, S3 buckets, and DNS resources that you will likely only want to create/purchase once, and reuse every time.

1. Create an IAM user with "AdministratorAccess" policy; we'll call it "kubernetes.click-admin"
2. Create an S3 bucket where kops will store state; we'll call it "kops-state-bucket.kubernetes.click"
3. Create an S3 bucket where terraform will store state; we'll call it "terraform-state-bucket.kubernetes.click"
4. Edit the bucket policy for both buckets to give access to our IAM user; each bucket's policy should look something like this:

{
    "Version": "2012-10-17",
    "Id": "BUCKET_NAME",
    "Statement": [
        {
            "Sid": "RANDOM_SID_1",
            "Effect": "Allow",
            "Principal": {
                "AWS": "IAM_USER_ARN"
            },
            "Action": [
                "s3:GetBucketLocation",
                "s3:ListBucket"
            ],
            "Resource": "arn:aws:s3:::BUCKET_NAME"
        },
        {
            "Sid": "RANDOM_SID_2",
            "Effect": "Allow",
            "Principal": {
                "AWS": "IAM_USER_ARN"
            },
            "Action": [
                "s3:GetObject",
                "s3:PutObject"
            ],
            "Resource": "arn:aws:s3:::BUCKET_NAME/*"
        }
    ]
}

1. Purchase the "kubernetes.click" domain from AWS through Route 53; this will automatically create a Route 53 Hosted Zone called "kubernetes.click" for you

Creating the cluster

1. Export AWS environment variables with credentials of the "kubernetes.click-admin" IAM user:

export AWS_ACCESS_KEY_ID=AKIAIOSFODNN7EXAMPLE
export AWS_SECRET_ACCESS_KEY=wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY
export AWS_DEFAULT_REGION=us-east-1

1. Create an SSH keypair for later access to cluster VMs: ssh-keygen -f ~/.ssh/id_rsa_kubernetes.click -N ""
2. Create the kops cluster configuration:

kops create cluster \
--cloud=aws \
--dns-zone=kubernetes.click \
--kubernetes-version 1.5.1 \
--master-size=t2.medium \
--master-zones=us-east-1a \
--node-count=2 \
--node-size=t2.medium \
--ssh-public-key=/Users/amitgupta/.ssh/id_rsa_kubernetes.click.pub \
--zones=us-east-1a,us-east-1b \
--name=kubernetes.click \
--state=s3://kops-state-bucket.kubernetes.click

Note: we need to jump ahead to Kubernetes version 1.5.1 due to a known issue with RBAC.

1. Generate the inputs for terraform:

NODEUP_URL=https://s3.amazonaws.com/amitkgupta-kops-binaries/nodeup kops update cluster \
--state=s3://kops-state-bucket.kubernetes.click \
--name=kubernetes.click \
--target=terraform \
--out=.

1. Configure terraform to use remote state:

terraform remote config \
-backend=s3 \
-backend-config="bucket=terraform-state-bucket.kubernetes.click" \
-backend-config="key=terraform.tfstate" \
-backend-config="region=us-east-1"

1. Modify the generated terraform inputs to disable load balancer services:

sed -i.bak 's/elasticloadbalancing:\*/elasticloadbalancing:DescribeLoadBalancers/' data/aws_iam_role_policy_masters.*_policy

Note: we stil need to allow elasticloadbalancing:DescribeLoadBalancers even for NodePort services due to a known issue.

1. Modify the generated terraform inputs to associate an ingress ELB for NodePort services to the Autoscaling Group for nodes:

grep load_balancers kubernetes.tf || sed -i.bak '/resource "aws_autoscaling_group" "nodes/a\
  load_balancers = ["${aws_elb.nodeport-elb-kubernetes-click.name}"]
' kubernetes.tf

1. Copy the nodeport-ingress.tf template to your working directory
2. From the generated terraform inputs, extract the subnets for the Autoscaling Group for nodes and insert that data into nodeport-ingress.tf:

NODEPORT_ELB_SUBNETS=$(sed -e '/resource "aws_autoscaling_group" "node/,/vpc_zone_identifier/!d' kubernetes.tf | tail -n1 | cut -f2 -d=)
sed -i.bak "s/subnets.*/subnets = ${NODEPORT_ELB_SUBNETS}/" nodeport-ingress.tf

1. Create the cluster: terraform apply

Administering the cluster

kubectl should just work.

Other operations on the cluster

Updating your local state

You should make sure your local state is up-to-date before performing other operations on the cluster. These steps will not perform operations on the cluster, they will just update your local state:

1. Export AWS environment variables as when creating the cluster
2. Generate up-to-date inputs for terraform as when creating the cluster by using kops update cluster
3. Configure terraform to use the same remote state as when creating the cluster by using terraform remote config
4. Modify the generated terraform inputs to disable load balancer services as when creating the cluster by using sed
5. Modify the generated terraform inputs to associate an ingress ELB for NodePort services to the Autoscaling Group for nodes as when creating the cluster by using sed
6. Make sure you have the nodeport-ingress.tf template in your working directory as when creating the cluster
7. Insert the subnets for the Autoscaling Group for nodes into nodeport-ingress.tf as when creating the cluster using sed

Deleting the cluster

1. Make sure your local state is up-to-date
2. Delete the cluster: terraform destroy -force
3. Delete the kops cluster configuration:

kops delete cluster --name=kubernetes.click --state=s3://kops-state-bucket.kubernetes.click --yes

1. Delete the SSH keypair: rm ~/.ssh/id_rsa_kubernetes.click*

Stopping the cluster

1. Make sure your local state is up-to-date
2. Modify the generated terraform inputs to set all autoscaling groups to 0:

sed -i.bak -E "s/(min_size|max_size).*/\1 = 0/" kubernetes.tf

1. Update the cluster: terraform apply

Restarting the cluster

1. Make sure your local state is up-to-date
2. Update the cluster: terraform apply

Setting up the developer sandbox

These instructions will create a dev namespace and leverage role-based access control in Kubernetes to ensure developers only have access to that namespace.

Enabling RBAC

1. Create the RBAC resources to ensure system components work in RBAC mode: kubectl create -f system-access.yml (system-access.yml)
2. Restrict the cluster to RBAC authorization only:

kops edit cluster --state=s3://kops-state-bucket.kubernetes.click
# set spec.kubeAPIServer.authorizationMode: RBAC

1. Stop and restart the cluster

Creating and locking down the dev namespace

1. Create the namespace and associated RBAC resources: kubectl create -f dev-access.yml (dev-access.yml)

Creating users in the developer sandbox

1. Download the kops-generated CA certificate and signing key from S3:

• s3://kops-state-bucket.kubernetes.click/kubernetes.click/pki/private/ca/*.key
• s3://kops-state-bucket.kubernetes.click/kubernetes.click/pki/issued/ca/*.crt

1. Generate a client key: openssl genrsa -out client-key.pem 2048
2. Generate a CSR:

openssl req -new \
-key client-key.pem \
-out client-csr.pem \
-subj "/[email protected]/O=dev"

1. Generate a client certificate:

openssl x509 -req \
-in client-csr.pem \
-CA ~/Downloads/*.crt \
-CAkey ~/Downloads/*.key \
-CAcreateserial \
-out client-crt.pem \
-days 10000

1. Base64-encode the client key, client certificate, and CA certificate, and populate those values in dev-kube-config.yml
2. Distribute the populated dev-kube-config.yml file to your developers

(Optional) Push the developer self-registration application

1. Create a Route 53 CNAME record pointing register.kubernetes.click to kubernetesclick-developer-registration.cfapps.io
2. Create a GitHub OAuth application with:

• Homepage URL: https://register.kubernetes.click
• Authorization callback URL: https://register.kubernetes.click/github_callback

1. Push the self-registration application to Pivotal Web Services

Appendix

system-access.yml

kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  name: system:node--kubelet
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:node
subjects:
- kind: User
  name: kubelet
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  name: cluster-admin--kube-system:default
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: default
  namespace: kube-system
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  name: system:node-proxier--kube-proxy
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:node-proxier
subjects:
- kind: User
  name: kube-proxy

dev-access.yml

kind: Namespace
apiVersion: v1
metadata:
  name: dev
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  namespace: dev
  name: dev-all
rules:
  - apiGroups: ["*"]
    resources: ["*"]
    verbs: ["*"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  name: dev-role-dev-all-members
  namespace: dev
subjects:
  - kind: Group
    name: dev
  - kind: Group
    name: system:serviceaccounts:dev
roleRef:
  kind: Role
  name: dev-all
  apiGroup: "rbac.authorization.k8s.io"

dev-kube-config.yml

apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: BASE64_ENCODED_CA_CERTIFICATE
    server: https://api.kubernetes.click
  name: kubernetes.click
contexts:
- context:
    cluster: kubernetes.click
    namespace: dev
    user: [email protected]
  name: kubernetes.click-dev
current-context: kubernetes.click-dev
kind: Config
preferences: {}
users:
- name: [email protected]
  user:
    client-certificate-data: BASE64_ENCODED_CLIENT_CERTIFICATE
    client-key-data: BASE64_ENCODED_CLIENT_KEY

nodeport-ingress.tf

data "aws_route53_zone" "zone-kubernetes-click" {
  name = "kubernetes.click"
}

resource "aws_route53_record" "dev-a-record-kubernetes-click" {
  zone_id = "${data.aws_route53_zone.zone-kubernetes-click.zone_id}"
  name    = "dev.kubernetes.click"
  type    = "CNAME"
  ttl     = "300"
  records = ["${aws_elb.nodeport-elb-kubernetes-click.dns_name}"]
}

resource "aws_security_group" "ingress-sg-nodeport-elb-kubernetes-click" {
  name = "ingress-sg.nodeport-elb.kubernetes.click"

  ingress {
    from_port   = 30000
    to_port     = 30099
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }

  vpc_id = "${aws_vpc.kubernetes-click.id}"
}

resource "aws_elb" "nodeport-elb-kubernetes-click" {
  name               = "nodeport-elb-kubernetes-click"
  security_groups    = ["${aws_security_group.nodes-kubernetes-click.id}", "${aws_security_group.ingress-sg-nodeport-elb-kubernetes-click.id}"]
  subnets

  health_check {
    healthy_threshold   = 2
    unhealthy_threshold = 2
    timeout             = 3
    target              = "TCP:22"
    interval            = 30
  }

  listener {
    instance_port     = 30000
    instance_protocol = "tcp"
    lb_port           = 30000
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30001
    instance_protocol = "tcp"
    lb_port           = 30001
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30002
    instance_protocol = "tcp"
    lb_port           = 30002
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30003
    instance_protocol = "tcp"
    lb_port           = 30003
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30004
    instance_protocol = "tcp"
    lb_port           = 30004
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30005
    instance_protocol = "tcp"
    lb_port           = 30005
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30006
    instance_protocol = "tcp"
    lb_port           = 30006
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30007
    instance_protocol = "tcp"
    lb_port           = 30007
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30008
    instance_protocol = "tcp"
    lb_port           = 30008
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30009
    instance_protocol = "tcp"
    lb_port           = 30009
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30010
    instance_protocol = "tcp"
    lb_port           = 30010
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30011
    instance_protocol = "tcp"
    lb_port           = 30011
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30012
    instance_protocol = "tcp"
    lb_port           = 30012
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30013
    instance_protocol = "tcp"
    lb_port           = 30013
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30014
    instance_protocol = "tcp"
    lb_port           = 30014
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30015
    instance_protocol = "tcp"
    lb_port           = 30015
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30016
    instance_protocol = "tcp"
    lb_port           = 30016
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30017
    instance_protocol = "tcp"
    lb_port           = 30017
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30018
    instance_protocol = "tcp"
    lb_port           = 30018
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30019
    instance_protocol = "tcp"
    lb_port           = 30019
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30020
    instance_protocol = "tcp"
    lb_port           = 30020
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30021
    instance_protocol = "tcp"
    lb_port           = 30021
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30022
    instance_protocol = "tcp"
    lb_port           = 30022
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30023
    instance_protocol = "tcp"
    lb_port           = 30023
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30024
    instance_protocol = "tcp"
    lb_port           = 30024
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30025
    instance_protocol = "tcp"
    lb_port           = 30025
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30026
    instance_protocol = "tcp"
    lb_port           = 30026
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30027
    instance_protocol = "tcp"
    lb_port           = 30027
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30028
    instance_protocol = "tcp"
    lb_port           = 30028
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30029
    instance_protocol = "tcp"
    lb_port           = 30029
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30030
    instance_protocol = "tcp"
    lb_port           = 30030
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30031
    instance_protocol = "tcp"
    lb_port           = 30031
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30032
    instance_protocol = "tcp"
    lb_port           = 30032
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30033
    instance_protocol = "tcp"
    lb_port           = 30033
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30034
    instance_protocol = "tcp"
    lb_port           = 30034
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30035
    instance_protocol = "tcp"
    lb_port           = 30035
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30036
    instance_protocol = "tcp"
    lb_port           = 30036
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30037
    instance_protocol = "tcp"
    lb_port           = 30037
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30038
    instance_protocol = "tcp"
    lb_port           = 30038
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30039
    instance_protocol = "tcp"
    lb_port           = 30039
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30040
    instance_protocol = "tcp"
    lb_port           = 30040
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30041
    instance_protocol = "tcp"
    lb_port           = 30041
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30042
    instance_protocol = "tcp"
    lb_port           = 30042
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30043
    instance_protocol = "tcp"
    lb_port           = 30043
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30044
    instance_protocol = "tcp"
    lb_port           = 30044
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30045
    instance_protocol = "tcp"
    lb_port           = 30045
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30046
    instance_protocol = "tcp"
    lb_port           = 30046
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30047
    instance_protocol = "tcp"
    lb_port           = 30047
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30048
    instance_protocol = "tcp"
    lb_port           = 30048
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30049
    instance_protocol = "tcp"
    lb_port           = 30049
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30050
    instance_protocol = "tcp"
    lb_port           = 30050
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30051
    instance_protocol = "tcp"
    lb_port           = 30051
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30052
    instance_protocol = "tcp"
    lb_port           = 30052
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30053
    instance_protocol = "tcp"
    lb_port           = 30053
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30054
    instance_protocol = "tcp"
    lb_port           = 30054
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30055
    instance_protocol = "tcp"
    lb_port           = 30055
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30056
    instance_protocol = "tcp"
    lb_port           = 30056
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30057
    instance_protocol = "tcp"
    lb_port           = 30057
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30058
    instance_protocol = "tcp"
    lb_port           = 30058
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30059
    instance_protocol = "tcp"
    lb_port           = 30059
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30060
    instance_protocol = "tcp"
    lb_port           = 30060
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30061
    instance_protocol = "tcp"
    lb_port           = 30061
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30062
    instance_protocol = "tcp"
    lb_port           = 30062
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30063
    instance_protocol = "tcp"
    lb_port           = 30063
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30064
    instance_protocol = "tcp"
    lb_port           = 30064
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30065
    instance_protocol = "tcp"
    lb_port           = 30065
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30066
    instance_protocol = "tcp"
    lb_port           = 30066
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30067
    instance_protocol = "tcp"
    lb_port           = 30067
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30068
    instance_protocol = "tcp"
    lb_port           = 30068
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30069
    instance_protocol = "tcp"
    lb_port           = 30069
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30070
    instance_protocol = "tcp"
    lb_port           = 30070
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30071
    instance_protocol = "tcp"
    lb_port           = 30071
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30072
    instance_protocol = "tcp"
    lb_port           = 30072
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30073
    instance_protocol = "tcp"
    lb_port           = 30073
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30074
    instance_protocol = "tcp"
    lb_port           = 30074
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30075
    instance_protocol = "tcp"
    lb_port           = 30075
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30076
    instance_protocol = "tcp"
    lb_port           = 30076
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30077
    instance_protocol = "tcp"
    lb_port           = 30077
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30078
    instance_protocol = "tcp"
    lb_port           = 30078
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30079
    instance_protocol = "tcp"
    lb_port           = 30079
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30080
    instance_protocol = "tcp"
    lb_port           = 30080
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30081
    instance_protocol = "tcp"
    lb_port           = 30081
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30082
    instance_protocol = "tcp"
    lb_port           = 30082
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30083
    instance_protocol = "tcp"
    lb_port           = 30083
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30084
    instance_protocol = "tcp"
    lb_port           = 30084
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30085
    instance_protocol = "tcp"
    lb_port           = 30085
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30086
    instance_protocol = "tcp"
    lb_port           = 30086
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30087
    instance_protocol = "tcp"
    lb_port           = 30087
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30088
    instance_protocol = "tcp"
    lb_port           = 30088
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30089
    instance_protocol = "tcp"
    lb_port           = 30089
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30090
    instance_protocol = "tcp"
    lb_port           = 30090
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30091
    instance_protocol = "tcp"
    lb_port           = 30091
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30092
    instance_protocol = "tcp"
    lb_port           = 30092
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30093
    instance_protocol = "tcp"
    lb_port           = 30093
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30094
    instance_protocol = "tcp"
    lb_port           = 30094
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30095
    instance_protocol = "tcp"
    lb_port           = 30095
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30096
    instance_protocol = "tcp"
    lb_port           = 30096
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30097
    instance_protocol = "tcp"
    lb_port           = 30097
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30098
    instance_protocol = "tcp"
    lb_port           = 30098
    lb_protocol       = "tcp"
  }

  listener {
    instance_port     = 30099
    instance_protocol = "tcp"
    lb_port           = 30099
    lb_protocol       = "tcp"
  }
}