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node.tf
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node.tf
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data "aws_region" "current" {}
# More information: https://amazon-eks.s3-us-west-2.amazonaws.com/1.10.3/2018-06-05/amazon-eks-nodegroup.yaml
locals {
demo-node-userdata = <<USERDATA
#!/bin/bash -xe
CA_CERTIFICATE_DIRECTORY=/etc/kubernetes/pki
CA_CERTIFICATE_FILE_PATH=$CA_CERTIFICATE_DIRECTORY/ca.crt
mkdir -p $CA_CERTIFICATE_DIRECTORY
echo "${aws_eks_cluster.mondoraeks-master.certificate_authority.0.data}" | base64 -d > $CA_CERTIFICATE_FILE_PATH
INTERNAL_IP=$(curl -s http://169.254.169.254/latest/meta-data/local-ipv4)
sed -i s,MASTER_ENDPOINT,${aws_eks_cluster.mondoraeks-master.endpoint},g /var/lib/kubelet/kubeconfig
sed -i s,CLUSTER_NAME,${var.service_name},g /var/lib/kubelet/kubeconfig
sed -i s,REGION,${data.aws_region.current.name},g /etc/systemd/system/kubelet.service
sed -i s,MAX_PODS,20,g /etc/systemd/system/kubelet.service
sed -i s,MASTER_ENDPOINT,${aws_eks_cluster.mondoraeks-master.endpoint},g /etc/systemd/system/kubelet.service
sed -i s,INTERNAL_IP,$INTERNAL_IP,g /etc/systemd/system/kubelet.service
DNS_CLUSTER_IP=10.100.0.10
if [[ $INTERNAL_IP == 10.* ]] ; then DNS_CLUSTER_IP=172.20.0.10; fi
sed -i s,DNS_CLUSTER_IP,$DNS_CLUSTER_IP,g /etc/systemd/system/kubelet.service
sed -i s,CERTIFICATE_AUTHORITY_FILE,$CA_CERTIFICATE_FILE_PATH,g /var/lib/kubelet/kubeconfig
sed -i s,CLIENT_CA_FILE,$CA_CERTIFICATE_FILE_PATH,g /etc/systemd/system/kubelet.service
systemctl daemon-reload
systemctl restart kubelet
USERDATA
}
resource "aws_launch_configuration" "mondoraeks-launch" {
associate_public_ip_address = true
iam_instance_profile = "${aws_iam_instance_profile.mondoraeks-node.name}"
image_id = "ami-066110c1a7466949e"
instance_type = "t2.large"
name_prefix = "${var.service_name}-${var.location}-node"
security_groups = ["${aws_security_group.mondoraeks-node.id}"]
user_data_base64 = "${base64encode(local.demo-node-userdata)}"
lifecycle {
create_before_destroy = true
}
}
resource "aws_autoscaling_group" "mondoraeks-asg" {
desired_capacity = 2
launch_configuration = "${aws_launch_configuration.mondoraeks-launch.id}"
max_size = 2
min_size = 1
name = "terraform-eks-demo"
vpc_zone_identifier = ["${aws_subnet.mondoraekssubnet.*.id}"]
tag {
key = "Name"
value = "${var.service_name}-${var.location}-eks"
propagate_at_launch = true
}
tag {
key = "kubernetes.io/cluster/${var.service_name}"
value = "owned"
propagate_at_launch = true
}
}
locals {
config-map-aws-auth = <<CONFIGMAPAWSAUTH
apiVersion: v1
kind: ConfigMap
metadata:
name: aws-auth
namespace: kube-system
data:
mapRoles: |
- rolearn: ${aws_iam_role.mondoraeks-node.arn}
username: system:node:{{EC2PrivateDNSName}}
groups:
- system:bootstrappers
- system:nodes
CONFIGMAPAWSAUTH
}
output "config-map-aws-auth" {
value = "${local.config-map-aws-auth}"
}