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Rename container-linux modules to flatcar-linux

Browse Source 
* CoreOS Container Linux was deprecated in v1.18.3
* Continue transitioning docs and modules from supporting
both CoreOS and Flatcar "variants" of Container Linux to
now supporting Flatcar Linux and equivalents

Action Required: Update the Flatcar Linux modules `source`
to replace `s/container-linux/flatcar-linux`. See docs for
examples
This commit is contained in:
Dalton Hubble
2020-10-20 22:47:19 -07:00
parent a99a990d49
commit 7c3f3ab6d0
98 changed files with 58 additions and 57 deletions
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The MIT License (MIT)
Copyright (c) 2017 Typhoon Authors
Copyright (c) 2017 Dalton Hubble
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# Typhoon <img align="right" src="https://storage.googleapis.com/poseidon/typhoon-logo.png">
Typhoon is a minimal and free Kubernetes distribution.
* Minimal, stable base Kubernetes distribution
* Declarative infrastructure and configuration
* Free (freedom and cost) and privacy-respecting
* Practical for labs, datacenters, and clouds
Typhoon distributes upstream Kubernetes, architectural conventions, and cluster addons, much like a GNU/Linux distribution provides the Linux kernel and userspace components.
## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>
* Kubernetes v1.19.3 (upstream)
* Single or multi-master, [Calico](https://www.projectcalico.org/) or [Cilium](https://github.com/cilium/cilium) or [flannel](https://github.com/coreos/flannel) networking
* On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/)
* Advanced features like [worker pools](https://typhoon.psdn.io/advanced/worker-pools/), [spot](https://typhoon.psdn.io/cl/aws/#spot) workers, and [snippets](https://typhoon.psdn.io/advanced/customization/#hosts) customization
* Ready for Ingress, Prometheus, Grafana, CSI, and other optional [addons](https://typhoon.psdn.io/addons/overview/)
## Docs
Please see the [official docs](https://typhoon.psdn.io) and the AWS [tutorial](https://typhoon.psdn.io/cl/aws/).

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locals {
# Pick a Flatcar Linux AMI
# flatcar-stable -> Flatcar Linux AMI
ami_id = data.aws_ami.flatcar.image_id
channel = split("-", var.os_image)[1]
}
data "aws_ami" "flatcar" {
most_recent = true
owners = ["075585003325"]
filter {
name = "architecture"
values = ["x86_64"]
}
filter {
name = "virtualization-type"
values = ["hvm"]
}
filter {
name = "name"
values = ["Flatcar-${local.channel}-*"]
}
}

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# Kubernetes assets (kubeconfig, manifests)
module "bootstrap" {
source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=9037d7311b949439b217cd9c657d4500eab3e16b"
cluster_name = var.cluster_name
api_servers = [format("%s.%s", var.cluster_name, var.dns_zone)]
etcd_servers = aws_route53_record.etcds.*.fqdn
networking = var.networking
network_mtu = var.network_mtu
pod_cidr = var.pod_cidr
service_cidr = var.service_cidr
cluster_domain_suffix = var.cluster_domain_suffix
enable_reporting = var.enable_reporting
enable_aggregation = var.enable_aggregation
}

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---
systemd:
units:
- name: etcd-member.service
enabled: true
dropins:
- name: 40-etcd-cluster.conf
contents: |
[Service]
Environment="ETCD_IMAGE_TAG=v3.4.12"
Environment="ETCD_IMAGE_URL=docker://quay.io/coreos/etcd"
Environment="RKT_RUN_ARGS=--insecure-options=image"
Environment="ETCD_NAME=${etcd_name}"
Environment="ETCD_ADVERTISE_CLIENT_URLS=https://${etcd_domain}:2379"
Environment="ETCD_INITIAL_ADVERTISE_PEER_URLS=https://${etcd_domain}:2380"
Environment="ETCD_LISTEN_CLIENT_URLS=https://0.0.0.0:2379"
Environment="ETCD_LISTEN_PEER_URLS=https://0.0.0.0:2380"
Environment="ETCD_LISTEN_METRICS_URLS=http://0.0.0.0:2381"
Environment="ETCD_INITIAL_CLUSTER=${etcd_initial_cluster}"
Environment="ETCD_STRICT_RECONFIG_CHECK=true"
Environment="ETCD_SSL_DIR=/etc/ssl/etcd"
Environment="ETCD_TRUSTED_CA_FILE=/etc/ssl/certs/etcd/server-ca.crt"
Environment="ETCD_CERT_FILE=/etc/ssl/certs/etcd/server.crt"
Environment="ETCD_KEY_FILE=/etc/ssl/certs/etcd/server.key"
Environment="ETCD_CLIENT_CERT_AUTH=true"
Environment="ETCD_PEER_TRUSTED_CA_FILE=/etc/ssl/certs/etcd/peer-ca.crt"
Environment="ETCD_PEER_CERT_FILE=/etc/ssl/certs/etcd/peer.crt"
Environment="ETCD_PEER_KEY_FILE=/etc/ssl/certs/etcd/peer.key"
Environment="ETCD_PEER_CLIENT_CERT_AUTH=true"
- name: docker.service
enabled: true
- name: locksmithd.service
mask: true
- name: wait-for-dns.service
enabled: true
contents: |
[Unit]
Description=Wait for DNS entries
Wants=systemd-resolved.service
Before=kubelet.service
[Service]
Type=oneshot
RemainAfterExit=true
ExecStart=/bin/sh -c 'while ! /usr/bin/grep '^[^#[:space:]]' /etc/resolv.conf > /dev/null; do sleep 1; done'
[Install]
RequiredBy=kubelet.service
RequiredBy=etcd-member.service
- name: kubelet.service
enabled: true
contents: |
[Unit]
Description=Kubelet
Requires=docker.service
After=docker.service
Wants=rpc-statd.service
[Service]
Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.19.3
Environment=KUBELET_CGROUP_DRIVER=${cgroup_driver}
ExecStartPre=/bin/mkdir -p /etc/kubernetes/cni/net.d
ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
ExecStartPre=/bin/mkdir -p /opt/cni/bin
ExecStartPre=/bin/mkdir -p /var/lib/calico
ExecStartPre=/bin/mkdir -p /var/lib/kubelet/volumeplugins
ExecStartPre=/usr/bin/bash -c "grep 'certificate-authority-data' /etc/kubernetes/kubeconfig | awk '{print $2}' | base64 -d > /etc/kubernetes/ca.crt"
ExecStartPre=/usr/bin/docker run -d \
--name kubelet \
--privileged \
--pid host \
--network host \
-v /etc/kubernetes:/etc/kubernetes:ro \
-v /etc/machine-id:/etc/machine-id:ro \
-v /usr/lib/os-release:/etc/os-release:ro \
-v /lib/modules:/lib/modules:ro \
-v /run:/run \
-v /sys/fs/cgroup:/sys/fs/cgroup:ro \
-v /sys/fs/cgroup/systemd:/sys/fs/cgroup/systemd \
-v /var/lib/calico:/var/lib/calico:ro \
-v /var/lib/docker:/var/lib/docker \
-v /var/lib/kubelet:/var/lib/kubelet:rshared \
-v /var/log:/var/log \
-v /opt/cni/bin:/opt/cni/bin \
$${KUBELET_IMAGE} \
--anonymous-auth=false \
--authentication-token-webhook \
--authorization-mode=Webhook \
--bootstrap-kubeconfig=/etc/kubernetes/kubeconfig \
--cgroup-driver=$${KUBELET_CGROUP_DRIVER} \
--client-ca-file=/etc/kubernetes/ca.crt \
--cluster_dns=${cluster_dns_service_ip} \
--cluster_domain=${cluster_domain_suffix} \
--cni-conf-dir=/etc/kubernetes/cni/net.d \
--healthz-port=0 \
--kubeconfig=/var/lib/kubelet/kubeconfig \
--network-plugin=cni \
--node-labels=node.kubernetes.io/controller="true" \
--pod-manifest-path=/etc/kubernetes/manifests \
--read-only-port=0 \
--register-with-taints=node-role.kubernetes.io/controller=:NoSchedule \
--rotate-certificates \
--volume-plugin-dir=/var/lib/kubelet/volumeplugins
ExecStart=docker logs -f kubelet
ExecStop=docker stop kubelet
ExecStopPost=docker rm kubelet
Restart=always
RestartSec=10
[Install]
WantedBy=multi-user.target
- name: bootstrap.service
contents: |
[Unit]
Description=Kubernetes control plane
ConditionPathExists=!/opt/bootstrap/bootstrap.done
[Service]
Type=oneshot
RemainAfterExit=true
WorkingDirectory=/opt/bootstrap
ExecStart=/usr/bin/rkt run \
--trust-keys-from-https \
--volume config,kind=host,source=/etc/kubernetes/bootstrap-secrets \
--mount volume=config,target=/etc/kubernetes/secrets \
--volume assets,kind=host,source=/opt/bootstrap/assets \
--mount volume=assets,target=/assets \
--volume script,kind=host,source=/opt/bootstrap/apply \
--mount volume=script,target=/apply \
--insecure-options=image \
docker://quay.io/poseidon/kubelet:v1.19.3 \
--net=host \
--dns=host \
--exec=/apply
ExecStartPost=/bin/touch /opt/bootstrap/bootstrap.done
[Install]
WantedBy=multi-user.target
storage:
directories:
- path: /var/lib/etcd
filesystem: root
mode: 0700
overwrite: true
files:
- path: /etc/kubernetes/kubeconfig
filesystem: root
mode: 0644
contents:
inline: |
${kubeconfig}
- path: /opt/bootstrap/layout
filesystem: root
mode: 0544
contents:
inline: |
#!/bin/bash -e
mkdir -p -- auth tls/etcd tls/k8s static-manifests manifests/coredns manifests-networking
awk '/#####/ {filename=$2; next} {print > filename}' assets
mkdir -p /etc/ssl/etcd/etcd
mkdir -p /etc/kubernetes/bootstrap-secrets
mv tls/etcd/{peer*,server*} /etc/ssl/etcd/etcd/
mv tls/etcd/etcd-client* /etc/kubernetes/bootstrap-secrets/
chown -R etcd:etcd /etc/ssl/etcd
chmod -R 500 /etc/ssl/etcd
chmod -R 700 /var/lib/etcd
mv auth/kubeconfig /etc/kubernetes/bootstrap-secrets/
mv tls/k8s/* /etc/kubernetes/bootstrap-secrets/
mkdir -p /etc/kubernetes/manifests
mv static-manifests/* /etc/kubernetes/manifests/
mkdir -p /opt/bootstrap/assets
mv manifests /opt/bootstrap/assets/manifests
mv manifests-networking/* /opt/bootstrap/assets/manifests/
rm -rf assets auth static-manifests tls manifests-networking
- path: /opt/bootstrap/apply
filesystem: root
mode: 0544
contents:
inline: |
#!/bin/bash -e
export KUBECONFIG=/etc/kubernetes/secrets/kubeconfig
until kubectl version; do
echo "Waiting for static pod control plane"
sleep 5
done
until kubectl apply -f /assets/manifests -R; do
echo "Retry applying manifests"
sleep 5
done
- path: /etc/sysctl.d/max-user-watches.conf
filesystem: root
mode: 0644
contents:
inline: |
fs.inotify.max_user_watches=16184
passwd:
users:
- name: core
ssh_authorized_keys:
- "${ssh_authorized_key}"

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# Discrete DNS records for each controller's private IPv4 for etcd usage
resource "aws_route53_record" "etcds" {
count = var.controller_count
# DNS Zone where record should be created
zone_id = var.dns_zone_id
name = format("%s-etcd%d.%s.", var.cluster_name, count.index, var.dns_zone)
type = "A"
ttl = 300
# private IPv4 address for etcd
records = [aws_instance.controllers.*.private_ip[count.index]]
}
# Controller instances
resource "aws_instance" "controllers" {
count = var.controller_count
tags = {
Name = "${var.cluster_name}-controller-${count.index}"
}
instance_type = var.controller_type
ami = local.ami_id
user_data = data.ct_config.controller-ignitions.*.rendered[count.index]
# storage
root_block_device {
volume_type = var.disk_type
volume_size = var.disk_size
iops = var.disk_iops
encrypted = true
}
# network
associate_public_ip_address = true
subnet_id = element(aws_subnet.public.*.id, count.index)
vpc_security_group_ids = [aws_security_group.controller.id]
lifecycle {
ignore_changes = [
ami,
user_data,
]
}
}
# Controller Ignition configs
data "ct_config" "controller-ignitions" {
count = var.controller_count
content = data.template_file.controller-configs.*.rendered[count.index]
strict = true
snippets = var.controller_snippets
}
# Controller Container Linux configs
data "template_file" "controller-configs" {
count = var.controller_count
template = file("${path.module}/cl/controller.yaml")
vars = {
# Cannot use cyclic dependencies on controllers or their DNS records
etcd_name = "etcd${count.index}"
etcd_domain = "${var.cluster_name}-etcd${count.index}.${var.dns_zone}"
# etcd0=https://cluster-etcd0.example.com,etcd1=https://cluster-etcd1.example.com,...
etcd_initial_cluster = join(",", data.template_file.etcds.*.rendered)
cgroup_driver = local.channel == "edge" ? "systemd" : "cgroupfs"
kubeconfig = indent(10, module.bootstrap.kubeconfig-kubelet)
ssh_authorized_key = var.ssh_authorized_key
cluster_dns_service_ip = cidrhost(var.service_cidr, 10)
cluster_domain_suffix = var.cluster_domain_suffix
}
}
data "template_file" "etcds" {
count = var.controller_count
template = "etcd$${index}=https://$${cluster_name}-etcd$${index}.$${dns_zone}:2380"
vars = {
index = count.index
cluster_name = var.cluster_name
dns_zone = var.dns_zone
}
}

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data "aws_availability_zones" "all" {
}
# Network VPC, gateway, and routes
resource "aws_vpc" "network" {
cidr_block = var.host_cidr
assign_generated_ipv6_cidr_block = true
enable_dns_support = true
enable_dns_hostnames = true
tags = {
"Name" = var.cluster_name
}
}
resource "aws_internet_gateway" "gateway" {
vpc_id = aws_vpc.network.id
tags = {
"Name" = var.cluster_name
}
}
resource "aws_route_table" "default" {
vpc_id = aws_vpc.network.id
tags = {
"Name" = var.cluster_name
}
}
resource "aws_route" "egress-ipv4" {
route_table_id = aws_route_table.default.id
destination_cidr_block = "0.0.0.0/0"
gateway_id = aws_internet_gateway.gateway.id
}
resource "aws_route" "egress-ipv6" {
route_table_id = aws_route_table.default.id
destination_ipv6_cidr_block = "::/0"
gateway_id = aws_internet_gateway.gateway.id
}
# Subnets (one per availability zone)
resource "aws_subnet" "public" {
count = length(data.aws_availability_zones.all.names)
vpc_id = aws_vpc.network.id
availability_zone = data.aws_availability_zones.all.names[count.index]
cidr_block = cidrsubnet(var.host_cidr, 4, count.index)
ipv6_cidr_block = cidrsubnet(aws_vpc.network.ipv6_cidr_block, 8, count.index)
map_public_ip_on_launch = true
assign_ipv6_address_on_creation = true
tags = {
"Name" = "${var.cluster_name}-public-${count.index}"
}
}
resource "aws_route_table_association" "public" {
count = length(data.aws_availability_zones.all.names)
route_table_id = aws_route_table.default.id
subnet_id = aws_subnet.public.*.id[count.index]
}

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# Network Load Balancer DNS Record
resource "aws_route53_record" "apiserver" {
zone_id = var.dns_zone_id
name = format("%s.%s.", var.cluster_name, var.dns_zone)
type = "A"
# AWS recommends their special "alias" records for NLBs
alias {
name = aws_lb.nlb.dns_name
zone_id = aws_lb.nlb.zone_id
evaluate_target_health = true
}
}
# Network Load Balancer for apiservers and ingress
resource "aws_lb" "nlb" {
name = "${var.cluster_name}-nlb"
load_balancer_type = "network"
internal = false
subnets = aws_subnet.public.*.id
enable_cross_zone_load_balancing = true
}
# Forward TCP apiserver traffic to controllers
resource "aws_lb_listener" "apiserver-https" {
load_balancer_arn = aws_lb.nlb.arn
protocol = "TCP"
port = "6443"
default_action {
type = "forward"
target_group_arn = aws_lb_target_group.controllers.arn
}
}
# Forward HTTP ingress traffic to workers
resource "aws_lb_listener" "ingress-http" {
load_balancer_arn = aws_lb.nlb.arn
protocol = "TCP"
port = 80
default_action {
type = "forward"
target_group_arn = module.workers.target_group_http
}
}
# Forward HTTPS ingress traffic to workers
resource "aws_lb_listener" "ingress-https" {
load_balancer_arn = aws_lb.nlb.arn
protocol = "TCP"
port = 443
default_action {
type = "forward"
target_group_arn = module.workers.target_group_https
}
}
# Target group of controllers
resource "aws_lb_target_group" "controllers" {
name = "${var.cluster_name}-controllers"
vpc_id = aws_vpc.network.id
target_type = "instance"
protocol = "TCP"
port = 6443
# TCP health check for apiserver
health_check {
protocol = "TCP"
port = 6443
# NLBs required to use same healthy and unhealthy thresholds
healthy_threshold = 3
unhealthy_threshold = 3
# Interval between health checks required to be 10 or 30
interval = 10
}
}
# Attach controller instances to apiserver NLB
resource "aws_lb_target_group_attachment" "controllers" {
count = var.controller_count
target_group_arn = aws_lb_target_group.controllers.arn
target_id = aws_instance.controllers.*.id[count.index]
port = 6443
}

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output "kubeconfig-admin" {
value = module.bootstrap.kubeconfig-admin
}
# Outputs for Kubernetes Ingress
output "ingress_dns_name" {
value = aws_lb.nlb.dns_name
description = "DNS name of the network load balancer for distributing traffic to Ingress controllers"
}
output "ingress_zone_id" {
value = aws_lb.nlb.zone_id
description = "Route53 zone id of the network load balancer DNS name that can be used in Route53 alias records"
}
# Outputs for worker pools
output "vpc_id" {
value = aws_vpc.network.id
description = "ID of the VPC for creating worker instances"
}
output "subnet_ids" {
value = aws_subnet.public.*.id
description = "List of subnet IDs for creating worker instances"
}
output "worker_security_groups" {
value = [aws_security_group.worker.id]
description = "List of worker security group IDs"
}
output "kubeconfig" {
value = module.bootstrap.kubeconfig-kubelet
}
# Outputs for custom load balancing
output "nlb_id" {
description = "ARN of the Network Load Balancer"
value = aws_lb.nlb.id
}
output "worker_target_group_http" {
description = "ARN of a target group of workers for HTTP traffic"
value = module.workers.target_group_http
}
output "worker_target_group_https" {
description = "ARN of a target group of workers for HTTPS traffic"
value = module.workers.target_group_https
}
# Outputs for debug
output "assets_dist" {
value = module.bootstrap.assets_dist
}

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# Security Groups (instance firewalls)
# Controller security group
resource "aws_security_group" "controller" {
name = "${var.cluster_name}-controller"
description = "${var.cluster_name} controller security group"
vpc_id = aws_vpc.network.id
tags = {
"Name" = "${var.cluster_name}-controller"
}
}
resource "aws_security_group_rule" "controller-icmp" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "icmp"
from_port = 8
to_port = 0
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-icmp-self" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "icmp"
from_port = 8
to_port = 0
self = true
}
resource "aws_security_group_rule" "controller-ssh" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 22
to_port = 22
cidr_blocks = ["0.0.0.0/0"]
}
resource "aws_security_group_rule" "controller-etcd" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 2379
to_port = 2380
self = true
}
# Allow Prometheus to scrape etcd metrics
resource "aws_security_group_rule" "controller-etcd-metrics" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 2381
to_port = 2381
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-cilium-health" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 4240
to_port = 4240
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-cilium-health-self" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 4240
to_port = 4240
self = true
}
# IANA VXLAN default
resource "aws_security_group_rule" "controller-vxlan" {
count = var.networking == "flannel" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "udp"
from_port = 4789
to_port = 4789
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-vxlan-self" {
count = var.networking == "flannel" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "udp"
from_port = 4789
to_port = 4789
self = true
}
resource "aws_security_group_rule" "controller-apiserver" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 6443
to_port = 6443
cidr_blocks = ["0.0.0.0/0"]
}
# Linux VXLAN default
resource "aws_security_group_rule" "controller-linux-vxlan" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "udp"
from_port = 8472
to_port = 8472
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-linux-vxlan-self" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "udp"
from_port = 8472
to_port = 8472
self = true
}
# Allow Prometheus to scrape node-exporter daemonset
resource "aws_security_group_rule" "controller-node-exporter" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 9100
to_port = 9100
source_security_group_id = aws_security_group.worker.id
}
# Allow Prometheus to scrape kube-proxy
resource "aws_security_group_rule" "kube-proxy-metrics" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 10249
to_port = 10249
source_security_group_id = aws_security_group.worker.id
}
# Allow apiserver to access kubelets for exec, log, port-forward
resource "aws_security_group_rule" "controller-kubelet" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 10250
to_port = 10250
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-kubelet-self" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 10250
to_port = 10250
self = true
}
# Allow Prometheus to scrape kube-scheduler
resource "aws_security_group_rule" "controller-scheduler-metrics" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 10251
to_port = 10251
source_security_group_id = aws_security_group.worker.id
}
# Allow Prometheus to scrape kube-controller-manager
resource "aws_security_group_rule" "controller-manager-metrics" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 10252
to_port = 10252
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-bgp" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 179
to_port = 179
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-bgp-self" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = "tcp"
from_port = 179
to_port = 179
self = true
}
resource "aws_security_group_rule" "controller-ipip" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = 4
from_port = 0
to_port = 0
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-ipip-self" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = 4
from_port = 0
to_port = 0
self = true
}
resource "aws_security_group_rule" "controller-ipip-legacy" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = 94
from_port = 0
to_port = 0
source_security_group_id = aws_security_group.worker.id
}
resource "aws_security_group_rule" "controller-ipip-legacy-self" {
security_group_id = aws_security_group.controller.id
type = "ingress"
protocol = 94
from_port = 0
to_port = 0
self = true
}
resource "aws_security_group_rule" "controller-egress" {
security_group_id = aws_security_group.controller.id
type = "egress"
protocol = "-1"
from_port = 0
to_port = 0
cidr_blocks = ["0.0.0.0/0"]
ipv6_cidr_blocks = ["::/0"]
}
# Worker security group
resource "aws_security_group" "worker" {
name = "${var.cluster_name}-worker"
description = "${var.cluster_name} worker security group"
vpc_id = aws_vpc.network.id
tags = {
"Name" = "${var.cluster_name}-worker"
}
}
resource "aws_security_group_rule" "worker-icmp" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "icmp"
from_port = 8
to_port = 0
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-icmp-self" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "icmp"
from_port = 8
to_port = 0
self = true
}
resource "aws_security_group_rule" "worker-ssh" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 22
to_port = 22
cidr_blocks = ["0.0.0.0/0"]
}
resource "aws_security_group_rule" "worker-http" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 80
to_port = 80
cidr_blocks = ["0.0.0.0/0"]
}
resource "aws_security_group_rule" "worker-https" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 443
to_port = 443
cidr_blocks = ["0.0.0.0/0"]
}
resource "aws_security_group_rule" "worker-cilium-health" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 4240
to_port = 4240
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-cilium-health-self" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 4240
to_port = 4240
self = true
}
# IANA VXLAN default
resource "aws_security_group_rule" "worker-vxlan" {
count = var.networking == "flannel" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "udp"
from_port = 4789
to_port = 4789
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-vxlan-self" {
count = var.networking == "flannel" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "udp"
from_port = 4789
to_port = 4789
self = true
}
# Linux VXLAN default
resource "aws_security_group_rule" "worker-linux-vxlan" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "udp"
from_port = 8472
to_port = 8472
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-linux-vxlan-self" {
count = var.networking == "cilium" ? 1 : 0
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "udp"
from_port = 8472
to_port = 8472
self = true
}
# Allow Prometheus to scrape node-exporter daemonset
resource "aws_security_group_rule" "worker-node-exporter" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 9100
to_port = 9100
self = true
}
# Allow Prometheus to scrape kube-proxy
resource "aws_security_group_rule" "worker-kube-proxy" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 10249
to_port = 10249
self = true
}
# Allow apiserver to access kubelets for exec, log, port-forward
resource "aws_security_group_rule" "worker-kubelet" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 10250
to_port = 10250
source_security_group_id = aws_security_group.controller.id
}
# Allow Prometheus to scrape kubelet metrics
resource "aws_security_group_rule" "worker-kubelet-self" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 10250
to_port = 10250
self = true
}
resource "aws_security_group_rule" "ingress-health" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 10254
to_port = 10254
cidr_blocks = ["0.0.0.0/0"]
}
resource "aws_security_group_rule" "worker-bgp" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 179
to_port = 179
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-bgp-self" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = "tcp"
from_port = 179
to_port = 179
self = true
}
resource "aws_security_group_rule" "worker-ipip" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = 4
from_port = 0
to_port = 0
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-ipip-self" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = 4
from_port = 0
to_port = 0
self = true
}
resource "aws_security_group_rule" "worker-ipip-legacy" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = 94
from_port = 0
to_port = 0
source_security_group_id = aws_security_group.controller.id
}
resource "aws_security_group_rule" "worker-ipip-legacy-self" {
security_group_id = aws_security_group.worker.id
type = "ingress"
protocol = 94
from_port = 0
to_port = 0
self = true
}
resource "aws_security_group_rule" "worker-egress" {
security_group_id = aws_security_group.worker.id
type = "egress"
protocol = "-1"
from_port = 0
to_port = 0
cidr_blocks = ["0.0.0.0/0"]
ipv6_cidr_blocks = ["::/0"]
}

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aws/flatcar-linux/kubernetes/ssh.tf Normal file
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locals {
# format assets for distribution
assets_bundle = [
# header with the unpack location
for key, value in module.bootstrap.assets_dist :
format("##### %s\n%s", key, value)
]
}
# Secure copy assets to controllers.
resource "null_resource" "copy-controller-secrets" {
count = var.controller_count
depends_on = [
module.bootstrap,
]
connection {
type = "ssh"
host = aws_instance.controllers.*.public_ip[count.index]
user = "core"
timeout = "15m"
}
provisioner "file" {
content = join("\n", local.assets_bundle)
destination = "$HOME/assets"
}
provisioner "remote-exec" {
inline = [
"sudo /opt/bootstrap/layout",
]
}
}
# Connect to a controller to perform one-time cluster bootstrap.
resource "null_resource" "bootstrap" {
depends_on = [
null_resource.copy-controller-secrets,
module.workers,
aws_route53_record.apiserver,
]
connection {
type = "ssh"
host = aws_instance.controllers[0].public_ip
user = "core"
timeout = "15m"
}
provisioner "remote-exec" {
inline = [
"sudo systemctl start bootstrap",
]
}
}

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aws/flatcar-linux/kubernetes/variables.tf Normal file
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variable "cluster_name" {
type = string
description = "Unique cluster name (prepended to dns_zone)"
}
# AWS
variable "dns_zone" {
type = string
description = "AWS Route53 DNS Zone (e.g. aws.example.com)"
}
variable "dns_zone_id" {
type = string
description = "AWS Route53 DNS Zone ID (e.g. Z3PAABBCFAKEC0)"
}
# instances
variable "controller_count" {
type = number
description = "Number of controllers (i.e. masters)"
default = 1
}
variable "worker_count" {
type = number
description = "Number of workers"
default = 1
}
variable "controller_type" {
type = string
description = "EC2 instance type for controllers"
default = "t3.small"
}
variable "worker_type" {
type = string
description = "EC2 instance type for workers"
default = "t3.small"
}
variable "os_image" {
type = string
description = "AMI channel for a Container Linux derivative (flatcar-stable, flatcar-beta, flatcar-alpha, flatcar-edge)"
default = "flatcar-stable"
}
variable "disk_size" {
type = number
description = "Size of the EBS volume in GB"
default = 40
}
variable "disk_type" {
type = string
description = "Type of the EBS volume (e.g. standard, gp2, io1)"
default = "gp2"
}
variable "disk_iops" {
type = number
description = "IOPS of the EBS volume (e.g. 100)"
default = 0
}
variable "worker_price" {
type = number
description = "Spot price in USD for worker instances or 0 to use on-demand instances"
default = 0
}
variable "worker_target_groups" {
type = list(string)
description = "Additional target group ARNs to which worker instances should be added"
default = []
}
variable "controller_snippets" {
type = list(string)
description = "Controller Container Linux Config snippets"
default = []
}
variable "worker_snippets" {
type = list(string)
description = "Worker Container Linux Config snippets"
default = []
}
# configuration
variable "ssh_authorized_key" {
type = string
description = "SSH public key for user 'core'"
}
variable "networking" {
type = string
description = "Choice of networking provider (calico or flannel)"
default = "calico"
}
variable "network_mtu" {
type = number
description = "CNI interface MTU (applies to calico only). Use 8981 if using instances types with Jumbo frames."
default = 1480
}
variable "host_cidr" {
type = string
description = "CIDR IPv4 range to assign to EC2 nodes"
default = "10.0.0.0/16"
}
variable "pod_cidr" {
type = string
description = "CIDR IPv4 range to assign Kubernetes pods"
default = "10.2.0.0/16"
}
variable "service_cidr" {
type = string
description = <<EOD
CIDR IPv4 range to assign Kubernetes services.
The 1st IP will be reserved for kube_apiserver, the 10th IP will be reserved for coredns.
EOD
default = "10.3.0.0/16"
}
variable "enable_reporting" {
type = bool
description = "Enable usage or analytics reporting to upstreams (Calico)"
default = false
}
variable "enable_aggregation" {
type = bool
description = "Enable the Kubernetes Aggregation Layer (defaults to false)"
default = false
}
variable "worker_node_labels" {
type = list(string)
description = "List of initial worker node labels"
default = []
}
# unofficial, undocumented, unsupported
variable "cluster_domain_suffix" {
type = string
description = "Queries for domains with the suffix will be answered by CoreDNS. Default is cluster.local (e.g. foo.default.svc.cluster.local)"
default = "cluster.local"
}

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# Terraform version and plugin versions
terraform {
required_version = ">= 0.12.26, < 0.14.0"
required_providers {
aws = ">= 2.23, <= 4.0"
template = "~> 2.1"
null = "~> 2.1"
ct = {
source = "poseidon/ct"
version = "~> 0.6.1"
}
}
}

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aws/flatcar-linux/kubernetes/workers.tf Normal file
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module "workers" {
source = "./workers"
name = var.cluster_name
# AWS
vpc_id = aws_vpc.network.id
subnet_ids = aws_subnet.public.*.id
security_groups = [aws_security_group.worker.id]
worker_count = var.worker_count
instance_type = var.worker_type
os_image = var.os_image
disk_size = var.disk_size
spot_price = var.worker_price
target_groups = var.worker_target_groups
# configuration
kubeconfig = module.bootstrap.kubeconfig-kubelet
ssh_authorized_key = var.ssh_authorized_key
service_cidr = var.service_cidr
cluster_domain_suffix = var.cluster_domain_suffix
snippets = var.worker_snippets
node_labels = var.worker_node_labels
}

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aws/flatcar-linux/kubernetes/workers/ami.tf Normal file
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locals {
# Pick a Flatcar Linux AMI
# flatcar-stable -> Flatcar Linux AMI
ami_id = data.aws_ami.flatcar.image_id
channel = split("-", var.os_image)[1]
}
data "aws_ami" "flatcar" {
most_recent = true
owners = ["075585003325"]
filter {
name = "architecture"
values = ["x86_64"]
}
filter {
name = "virtualization-type"
values = ["hvm"]
}
filter {
name = "name"
values = ["Flatcar-${local.channel}-*"]
}
}

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aws/flatcar-linux/kubernetes/workers/cl/worker.yaml Normal file
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---
systemd:
units:
- name: docker.service
enabled: true
- name: locksmithd.service
mask: true
- name: wait-for-dns.service
enabled: true
contents: |
[Unit]
Description=Wait for DNS entries
Wants=systemd-resolved.service
Before=kubelet.service
[Service]
Type=oneshot
RemainAfterExit=true
ExecStart=/bin/sh -c 'while ! /usr/bin/grep '^[^#[:space:]]' /etc/resolv.conf > /dev/null; do sleep 1; done'
[Install]
RequiredBy=kubelet.service
- name: kubelet.service
enabled: true
contents: |
[Unit]
Description=Kubelet
Requires=docker.service
After=docker.service
Wants=rpc-statd.service
[Service]
Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.19.3
Environment=KUBELET_CGROUP_DRIVER=${cgroup_driver}
ExecStartPre=/bin/mkdir -p /etc/kubernetes/cni/net.d
ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
ExecStartPre=/bin/mkdir -p /opt/cni/bin
ExecStartPre=/bin/mkdir -p /var/lib/calico
ExecStartPre=/bin/mkdir -p /var/lib/kubelet/volumeplugins
ExecStartPre=/usr/bin/bash -c "grep 'certificate-authority-data' /etc/kubernetes/kubeconfig | awk '{print $2}' | base64 -d > /etc/kubernetes/ca.crt"
# Podman, rkt, or runc run container processes, whereas docker run
# is a client to a daemon and requires workarounds to use within a
# systemd unit. https://github.com/moby/moby/issues/6791
ExecStartPre=/usr/bin/docker run -d \
--name kubelet \
--privileged \
--pid host \
--network host \
-v /etc/kubernetes:/etc/kubernetes:ro \
-v /etc/machine-id:/etc/machine-id:ro \
-v /usr/lib/os-release:/etc/os-release:ro \
-v /lib/modules:/lib/modules:ro \
-v /run:/run \
-v /sys/fs/cgroup:/sys/fs/cgroup:ro \
-v /sys/fs/cgroup/systemd:/sys/fs/cgroup/systemd \
-v /var/lib/calico:/var/lib/calico:ro \
-v /var/lib/docker:/var/lib/docker \
-v /var/lib/kubelet:/var/lib/kubelet:rshared \
-v /var/log:/var/log \
-v /opt/cni/bin:/opt/cni/bin \
$${KUBELET_IMAGE} \
--anonymous-auth=false \
--authentication-token-webhook \
--authorization-mode=Webhook \
--bootstrap-kubeconfig=/etc/kubernetes/kubeconfig \
--cgroup-driver=$${KUBELET_CGROUP_DRIVER} \
--client-ca-file=/etc/kubernetes/ca.crt \
--cluster_dns=${cluster_dns_service_ip} \
--cluster_domain=${cluster_domain_suffix} \
--cni-conf-dir=/etc/kubernetes/cni/net.d \
--healthz-port=0 \
--kubeconfig=/var/lib/kubelet/kubeconfig \
--network-plugin=cni \
--node-labels=node.kubernetes.io/node \
%{~ for label in split(",", node_labels) ~}
--node-labels=${label} \
%{~ endfor ~}
--pod-manifest-path=/etc/kubernetes/manifests \
--read-only-port=0 \
--rotate-certificates \
--volume-plugin-dir=/var/lib/kubelet/volumeplugins
ExecStart=docker logs -f kubelet
ExecStop=docker stop kubelet
ExecStopPost=docker rm kubelet
Restart=always
RestartSec=5
[Install]
WantedBy=multi-user.target
- name: delete-node.service
enabled: true
contents: |
[Unit]
Description=Delete Kubernetes node on shutdown
[Service]
Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.19.3
Type=oneshot
RemainAfterExit=true
ExecStart=/bin/true
ExecStop=/bin/bash -c '/usr/bin/docker run -v /var/lib/kubelet:/var/lib/kubelet:ro --entrypoint /usr/local/bin/kubectl $${KUBELET_IMAGE} --kubeconfig=/var/lib/kubelet/kubeconfig delete node $HOSTNAME'
[Install]
WantedBy=multi-user.target
storage:
files:
- path: /etc/kubernetes/kubeconfig
filesystem: root
mode: 0644
contents:
inline: |
${kubeconfig}
- path: /etc/sysctl.d/max-user-watches.conf
filesystem: root
mode: 0644
contents:
inline: |
fs.inotify.max_user_watches=16184
passwd:
users:
- name: core
ssh_authorized_keys:
- "${ssh_authorized_key}"

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aws/flatcar-linux/kubernetes/workers/ingress.tf Normal file
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# Target groups of instances for use with load balancers
resource "aws_lb_target_group" "workers-http" {
name = "${var.name}-workers-http"
vpc_id = var.vpc_id
target_type = "instance"
protocol = "TCP"
port = 80
# HTTP health check for ingress
health_check {
protocol = "HTTP"
port = 10254
path = "/healthz"
# NLBs required to use same healthy and unhealthy thresholds
healthy_threshold = 3
unhealthy_threshold = 3
# Interval between health checks required to be 10 or 30
interval = 10
}
}
resource "aws_lb_target_group" "workers-https" {
name = "${var.name}-workers-https"
vpc_id = var.vpc_id
target_type = "instance"
protocol = "TCP"
port = 443
# HTTP health check for ingress
health_check {
protocol = "HTTP"
port = 10254
path = "/healthz"
# NLBs required to use same healthy and unhealthy thresholds
healthy_threshold = 3
unhealthy_threshold = 3
# Interval between health checks required to be 10 or 30
interval = 10
}
}

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aws/flatcar-linux/kubernetes/workers/outputs.tf Normal file
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output "target_group_http" {
description = "ARN of a target group of workers for HTTP traffic"
value = aws_lb_target_group.workers-http.arn
}
output "target_group_https" {
description = "ARN of a target group of workers for HTTPS traffic"
value = aws_lb_target_group.workers-https.arn
}

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variable "name" {
type = string
description = "Unique name for the worker pool"
}
# AWS
variable "vpc_id" {
type = string
description = "Must be set to `vpc_id` output by cluster"
}
variable "subnet_ids" {
type = list(string)
description = "Must be set to `subnet_ids` output by cluster"
}
variable "security_groups" {
type = list(string)
description = "Must be set to `worker_security_groups` output by cluster"
}
# instances
variable "worker_count" {
type = number
description = "Number of instances"
default = 1
}
variable "instance_type" {
type = string
description = "EC2 instance type"
default = "t3.small"
}
variable "os_image" {
type = string
description = "AMI channel for a Container Linux derivative (flatcar-stable, flatcar-beta, flatcar-alpha, flatcar-edge)"
default = "flatcar-stable"
}
variable "disk_size" {
type = number
description = "Size of the EBS volume in GB"
default = 40
}
variable "disk_type" {
type = string
description = "Type of the EBS volume (e.g. standard, gp2, io1)"
default = "gp2"
}
variable "disk_iops" {
type = number
description = "IOPS of the EBS volume (required for io1)"
default = 0
}
variable "spot_price" {
type = number
description = "Spot price in USD for worker instances or 0 to use on-demand instances"
default = 0
}
variable "target_groups" {
type = list(string)
description = "Additional target group ARNs to which instances should be added"
default = []
}
variable "snippets" {
type = list(string)
description = "Container Linux Config snippets"
default = []
}
# configuration
variable "kubeconfig" {
type = string
description = "Must be set to `kubeconfig` output by cluster"
}
variable "ssh_authorized_key" {
type = string
description = "SSH public key for user 'core'"
}
variable "service_cidr" {
type = string
description = <<EOD
CIDR IPv4 range to assign Kubernetes services.
The 1st IP will be reserved for kube_apiserver, the 10th IP will be reserved for coredns.
EOD
default = "10.3.0.0/16"
}
variable "cluster_domain_suffix" {
type = string
description = "Queries for domains with the suffix will be answered by coredns. Default is cluster.local (e.g. foo.default.svc.cluster.local) "
default = "cluster.local"
}
variable "node_labels" {
type = list(string)
description = "List of initial node labels"
default = []
}

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aws/flatcar-linux/kubernetes/workers/versions.tf Normal file
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# Terraform version and plugin versions
terraform {
required_version = ">= 0.12.26, < 0.14.0"
required_providers {
aws = ">= 2.23, <= 4.0"
template = "~> 2.1"
ct = {
source = "poseidon/ct"
version = "~> 0.6.1"
}
}
}

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# Workers AutoScaling Group
resource "aws_autoscaling_group" "workers" {
name = "${var.name}-worker ${aws_launch_configuration.worker.name}"
# count
desired_capacity = var.worker_count
min_size = var.worker_count
max_size = var.worker_count + 2
default_cooldown = 30
health_check_grace_period = 30
# network
vpc_zone_identifier = var.subnet_ids
# template
launch_configuration = aws_launch_configuration.worker.name
# target groups to which instances should be added
target_group_arns = flatten([
aws_lb_target_group.workers-http.id,
aws_lb_target_group.workers-https.id,
var.target_groups,
])
lifecycle {
# override the default destroy and replace update behavior
create_before_destroy = true
}
# Waiting for instance creation delays adding the ASG to state. If instances
# can't be created (e.g. spot price too low), the ASG will be orphaned.
# Orphaned ASGs escape cleanup, can't be updated, and keep bidding if spot is
# used. Disable wait to avoid issues and align with other clouds.
wait_for_capacity_timeout = "0"
tags = [
{
key = "Name"
value = "${var.name}-worker"
propagate_at_launch = true
},
]
}
# Worker template
resource "aws_launch_configuration" "worker" {
image_id = local.ami_id
instance_type = var.instance_type
spot_price = var.spot_price > 0 ? var.spot_price : null
enable_monitoring = false
user_data = data.ct_config.worker-ignition.rendered
# storage
root_block_device {
volume_type = var.disk_type
volume_size = var.disk_size
iops = var.disk_iops
encrypted = true
}
# network
security_groups = var.security_groups
lifecycle {
// Override the default destroy and replace update behavior
create_before_destroy = true
ignore_changes = [image_id]
}
}
# Worker Ignition config
data "ct_config" "worker-ignition" {
content = data.template_file.worker-config.rendered
strict = true
snippets = var.snippets
}
# Worker Container Linux config
data "template_file" "worker-config" {
template = file("${path.module}/cl/worker.yaml")
vars = {
kubeconfig = indent(10, var.kubeconfig)
ssh_authorized_key = var.ssh_authorized_key
cluster_dns_service_ip = cidrhost(var.service_cidr, 10)
cluster_domain_suffix = var.cluster_domain_suffix
cgroup_driver = local.channel == "edge" ? "systemd" : "cgroupfs"
node_labels = join(",", var.node_labels)
}
}