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eks.tf
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eks.tf
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locals {
worker_groups = [
{
name = "agents"
instance_type = "${var.worker_instance_type}"
root_volume_size = "50"
root_volume_size = "${var.worker_root_volume_size}"
asg_min_size = 0
asg_desired_capacity = 0
asg_max_size = 6
autoscaling_enabled = true
protect_from_scale_in = true
subnets = "${aws_subnet.jenkins_workers_c.id}"
kubelet_extra_args = "--node-labels=nodegroup=agent"
},
{
name = "admin"
instance_type = "t3.medium"
root_volume_size = "50"
# eks needs at least one node online for dns pods/etc. or it bricks
asg_min_size = 1
asg_desired_capacity = 1
asg_max_size = 2
autoscaling_enabled = true
protect_from_scale_in = true
subnets = "${aws_subnet.jenkins_workers_c.id}"
kubelet_extra_args = "--node-labels=nodegroup=admin"
},
]
# recent versions of eks are creating a gp2 sc by default; attempting to
# declare our own causes an error.
k8s_storage_class = "gp2"
}
module "eks" {
source = "terraform-aws-modules/eks/aws"
version = "4.0.2"
cluster_name = "${local.k8s_cluster_name}"
cluster_version = "1.14"
write_aws_auth_config = false
write_kubeconfig = true
subnets = [
"${aws_subnet.jenkins-demo.id}",
"${aws_subnet.jenkins_workers_c.id}",
"${aws_subnet.jenkins_workers_d.id}",
]
tags = {
Name = "${local.k8s_cluster_name}"
env_name = "${var.env_name}"
}
vpc_id = "${aws_vpc.jenkins-demo.id}"
worker_groups = "${local.worker_groups}"
# length() does not work on first run under tf 0.11.14
#worker_group_count = "${length(local.worker_groups)}"
worker_group_count = "2"
# allow communication between worker nodes and jenkins master ec2 instance
cluster_security_group_id = "${aws_security_group.jenkins-demo-internal.id}"
worker_security_group_id = "${aws_security_group.jenkins-demo-internal.id}"
#worker_additional_security_group_ids = [
# "${aws_security_group.jenkins-demo-internal.id}",
#]
worker_ami_name_filter = "v20190822"
cluster_enabled_log_types = [
"api",
"audit",
"authenticator",
"controllerManager",
"scheduler",
]
}
# if vpc networking related resources are destroyed down before k8s resources,
# eks might break...
# And the k8s api seems to like to timeout right after eks comes up
resource "null_resource" "eks_ready" {
depends_on = [
"aws_vpc.jenkins-demo",
"aws_internet_gateway.jenkins-demo",
"aws_vpc_dhcp_options.jenkins",
"aws_vpc_dhcp_options_association.jenkins",
"aws_route53_zone.jenkins-internal",
"aws_route53_record.jenkins-master-internal",
"aws_subnet.jenkins-demo",
"aws_subnet.jenkins_workers_c",
"aws_subnet.jenkins_workers_d",
"aws_route_table.jenkins-demo",
"aws_main_route_table_association.jenkins-demo",
"aws_network_acl.jenkins-demo",
"aws_eip.jenkins-demo-master",
"aws_security_group.jenkins-demo-ssh",
"aws_security_group.jenkins-demo-http",
"aws_security_group.jenkins-demo-slaveport",
"aws_security_group.jenkins-demo-internal",
]
#"module.eks",
provisioner "local-exec" {
working_dir = "${path.module}"
command = <<EOS
for i in `seq 1 10`; do \
kubectl --kubeconfig ${null_resource.eks_ready.triggers.config_path} get ns && break || \
sleep 10; \
done; \
EOS
interpreter = ["/bin/sh", "-c"]
}
triggers {
host = "${module.eks.cluster_endpoint}"
config_path = "${module.eks.kubeconfig_filename}"
cluster_ca_certificate = "${base64decode(module.eks.cluster_certificate_authority_data)}"
}
}
#resource "aws_cloudwatch_log_group" "eks" {
# name = "/aws/eks/${local.k8s_cluster_name}/cluster"
#
# retention_in_days = "7"
#
# tags = {
# Name = "${local.k8s_cluster_name}"
# }
#}
data "aws_eks_cluster" "cluster" {
name = "${module.eks.cluster_id}"
}
data "aws_eks_cluster_auth" "cluster" {
name = "${module.eks.cluster_id}"
}
provider "kubernetes" {
version = "~> 1.8.1"
cluster_ca_certificate = "${base64decode(data.aws_eks_cluster.cluster.certificate_authority.0.data)}"
host = "${data.aws_eks_cluster.cluster.endpoint}"
load_config_file = false
token = "${data.aws_eks_cluster_auth.cluster.token}"
}
resource "kubernetes_namespace" "tiller" {
metadata {
name = "${local.tiller_k8s_namespace}"
}
depends_on = [
"null_resource.eks_ready",
]
}
module "tiller" {
source = "git::https://github.com/lsst-sqre/terraform-tinfoil-tiller.git//?ref=0.10.x"
namespace = "${kubernetes_namespace.tiller.metadata.0.name}"
service_account = "tiller"
}
provider "helm" {
version = "~> 0.10.2"
service_account = "${module.tiller.service_account}"
namespace = "${module.tiller.namespace}"
install_tiller = false
kubernetes {
cluster_ca_certificate = "${base64decode(data.aws_eks_cluster.cluster.certificate_authority.0.data)}"
host = "${data.aws_eks_cluster.cluster.endpoint}"
load_config_file = false
token = "${data.aws_eks_cluster_auth.cluster.token}"
}
}