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Add docs for Azure Ingress and worker pools 

* Azure worker pools must be in the same region as
the cluster itself unfortunately
This commit is contained in:
Dalton Hubble 2018-08-27 22:24:52 -07:00
parent 019009e9ee
commit 4882fe1053
14 changed files with 429 additions and 42 deletions
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2
CHANGES.md
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@ -4,6 +4,8 @@ Notable changes between versions.
## Latest
* Introduce Typhoon for Azure as alpha ([#288](https://github.com/poseidon/typhoon/pull/288))
* Special thanks @justaugustus for an earlier variant
* Update Calico from v3.1.3 to v3.2.1 ([#278](https://github.com/poseidon/typhoon/pull/278))
#### AWS

6
addons/nginx-ingress/azure/0-namespace.yaml Normal file
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@ -0,0 +1,6 @@
apiVersion: v1
kind: Namespace
metadata:
name: ingress
labels:
name: ingress

40
addons/nginx-ingress/azure/default-backend/deployment.yaml Normal file
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@ -0,0 +1,40 @@
apiVersion: apps/v1
kind: Deployment
metadata:
name: default-backend
namespace: ingress
spec:
replicas: 1
selector:
matchLabels:
name: default-backend
phase: prod
template:
metadata:
labels:
name: default-backend
phase: prod
spec:
containers:
- name: default-backend
# Any image is permissable as long as:
# 1. It serves a 404 page at /
# 2. It serves 200 on a /healthz endpoint
image: k8s.gcr.io/defaultbackend:1.4
ports:
- containerPort: 8080
resources:
limits:
cpu: 10m
memory: 20Mi
requests:
cpu: 10m
memory: 20Mi
livenessProbe:
httpGet:
path: /healthz
port: 8080
scheme: HTTP
initialDelaySeconds: 30
timeoutSeconds: 5
terminationGracePeriodSeconds: 60

15
addons/nginx-ingress/azure/default-backend/service.yaml Normal file
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@ -0,0 +1,15 @@
apiVersion: v1
kind: Service
metadata:
name: default-backend
namespace: ingress
spec:
type: ClusterIP
selector:
name: default-backend
phase: prod
ports:
- name: http
protocol: TCP
port: 80
targetPort: 8080

77
addons/nginx-ingress/azure/deployment.yaml Normal file
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@ -0,0 +1,77 @@
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-ingress-controller
namespace: ingress
spec:
replicas: 2
strategy:
rollingUpdate:
maxUnavailable: 1
selector:
matchLabels:
name: nginx-ingress-controller
phase: prod
template:
metadata:
labels:
name: nginx-ingress-controller
phase: prod
spec:
nodeSelector:
node-role.kubernetes.io/node: ""
containers:
- name: nginx-ingress-controller
image: quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.17.1
args:
- /nginx-ingress-controller
- --default-backend-service=$(POD_NAMESPACE)/default-backend
- --ingress-class=public
# use downward API
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
ports:
- name: http
containerPort: 80
hostPort: 80
- name: https
containerPort: 443
hostPort: 443
- name: health
containerPort: 10254
hostPort: 10254
livenessProbe:
failureThreshold: 3
httpGet:
path: /healthz
port: 10254
scheme: HTTP
initialDelaySeconds: 10
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
readinessProbe:
failureThreshold: 3
httpGet:
path: /healthz
port: 10254
scheme: HTTP
periodSeconds: 10
successThreshold: 1
timeoutSeconds: 1
securityContext:
capabilities:
add:
- NET_BIND_SERVICE
drop:
- ALL
runAsUser: 33 # www-data
restartPolicy: Always
terminationGracePeriodSeconds: 60

12
addons/nginx-ingress/azure/rbac/cluster-role-binding.yaml Normal file
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@ -0,0 +1,12 @@
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: ingress
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: ingress
subjects:
- kind: ServiceAccount
namespace: ingress
name: default

51
addons/nginx-ingress/azure/rbac/cluster-role.yaml Normal file
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@ -0,0 +1,51 @@
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: ingress
rules:
- apiGroups:
- ""
resources:
- configmaps
- endpoints
- nodes
- pods
- secrets
verbs:
- list
- watch
- apiGroups:
- ""
resources:
- nodes
verbs:
- get
- apiGroups:
- ""
resources:
- services
verbs:
- get
- list
- watch
- apiGroups:
- "extensions"
resources:
- ingresses
verbs:
- get
- list
- watch
- apiGroups:
- ""
resources:
- events
verbs:
- create
- patch
- apiGroups:
- "extensions"
resources:
- ingresses/status
verbs:
- update

13
addons/nginx-ingress/azure/rbac/role-binding.yaml Normal file
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@ -0,0 +1,13 @@
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: ingress
namespace: ingress
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: ingress
subjects:
- kind: ServiceAccount
namespace: ingress
name: default

41
addons/nginx-ingress/azure/rbac/role.yaml Normal file
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@ -0,0 +1,41 @@
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
name: ingress
namespace: ingress
rules:
- apiGroups:
- ""
resources:
- configmaps
- pods
- secrets
verbs:
- get
- apiGroups:
- ""
resources:
- configmaps
resourceNames:
# Defaults to "<election-id>-<ingress-class>"
# Here: "<ingress-controller-leader>-<nginx>"
# This has to be adapted if you change either parameter
# when launching the nginx-ingress-controller.
- "ingress-controller-leader-public"
verbs:
- get
- update
- apiGroups:
- ""
resources:
- configmaps
verbs:
- create
- apiGroups:
- ""
resources:
- endpoints
verbs:
- get
- create
- update

22
addons/nginx-ingress/azure/service.yaml Normal file
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@ -0,0 +1,22 @@
apiVersion: v1
kind: Service
metadata:
name: nginx-ingress-controller
namespace: ingress
annotations:
prometheus.io/scrape: 'true'
prometheus.io/port: '10254'
spec:
type: ClusterIP
selector:
name: nginx-ingress-controller
phase: prod
ports:
- name: http
protocol: TCP
port: 80
targetPort: 80
- name: https
protocol: TCP
port: 443
targetPort: 443

2
azure/container-linux/kubernetes/workers/variables.tf
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@ -40,7 +40,7 @@ variable "count" {
variable "vm_type" {
type = "string"
default = "Standard_DS1_v2"
default = "Standard_F1"
description = "Machine type for instances (see `az vm list-skus --location centralus`)"
}

101
docs/addons/ingress.md
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@ -4,7 +4,7 @@ Nginx Ingress controller pods accept and demultiplex HTTP, HTTPS, TCP, or UDP tr
## AWS
On AWS, a network load balancer (NLB) distributes traffic across a target group of worker nodes running an Ingress controller deployment on host ports 80 and 443. Firewall rules allow traffic to ports 80 and 443. Health check rules ensure only workers with a health Ingress controller receive traffic.
On AWS, a network load balancer (NLB) distributes traffic across a target group of worker nodes running an Ingress controller deployment. Security group rules allow traffic to ports 80 and 443. Health checks ensure only workers with a healthy Ingress controller receive traffic.
Create the Ingress controller deployment, service, RBAC roles, RBAC bindings, default backend, and namespace.
@ -35,44 +35,17 @@ resource "google_dns_record_set" "some-application" {
}
```
## Digital Ocean
## Azure
On Digital Ocean, a DNS A record (e.g. `nemo-workers.example.com`) resolves to each worker[^1] running an Ingress controller DaemonSet on host ports 80 and 443. Firewall rules allow IPv4 and IPv6 traffic to ports 80 and 443.
Create the Ingress controller daemonset, service, RBAC roles, RBAC bindings, default backend, and namespace.
```
kubectl apply -R -f addons/nginx-ingress/digital-ocean
```
For each application, add a CNAME record resolving to the worker(s) DNS record. Use the Typhoon module's output `workers_dns` to find the worker DNS value. For example, you might use Terraform to manage a Google Cloud DNS record:
```tf
resource "google_dns_record_set" "some-application" {
# DNS zone name
managed_zone = "example-zone"
# DNS record
name = "app.example.com."
type = "CNAME"
ttl = 300
rrdatas = ["${module.digital-ocean-nemo.workers_dns}."]
}
```
[^1]: Digital Ocean does offers load balancers. We've opted not to use them to keep the Digital Ocean setup simple and cheap for developers.
## Google Cloud
On Google Cloud, a network load balancer distributes traffic across worker nodes (i.e. a target pool of backends) running an Ingress controller deployment on host ports 80 and 443. Firewall rules allow traffic to ports 80 and 443. Health check rules ensure the target pool only includes worker nodes with a healthy Nginx Ingress controller.
On Azure, a load balancer distributes traffic across a backend pool of worker nodes running an Ingress controller deployment. Security group rules allow traffic to ports 80 and 443. Health probes ensure only workers with a healthy Ingress controller receive traffic.
Create the Ingress controller deployment, service, RBAC roles, RBAC bindings, default backend, and namespace.
```
kubectl apply -R -f addons/nginx-ingress/google-cloud
kubectl apply -R -f addons/nginx-ingress/azure
```
For each application, add a DNS record resolving to the network load balancer's IPv4 address.
For each application, add a DNS record resolving to the load balancer's IPv4 address.
```
app1.example.com -> 11.22.33.44
@ -80,7 +53,7 @@ aap2.example.com -> 11.22.33.44
app3.example.com -> 11.22.33.44
```
Find the IPv4 address with `gcloud compute addresses list` or use the Typhoon module's output `ingress_static_ipv4`. For example, you might use Terraform to manage a Google Cloud DNS record:
Find the load balancer's IPv4 address with the Azure console or use the Typhoon module's output `ingress_static_ipv4`. For example, you might use Terraform to manage a Google Cloud DNS record:
```tf
resource "google_dns_record_set" "some-application" {
@ -91,7 +64,7 @@ resource "google_dns_record_set" "some-application" {
name = "app.example.com."
type = "A"
ttl = 300
rrdatas = ["${module.google-cloud-yavin.ingress_static_ipv4}"]
rrdatas = ["${module.azure-ramius.ingress_static_ipv4}"]
}
```
@ -125,3 +98,63 @@ resource "google_dns_record_set" "some-application" {
rrdatas = ["SOME-WAN-IP"]
}
```
## Digital Ocean
On Digital Ocean, a DNS A record (e.g. `nemo-workers.example.com`) resolves to each worker[^1] running an Ingress controller DaemonSet on host ports 80 and 443. Firewall rules allow IPv4 and IPv6 traffic to ports 80 and 443.
Create the Ingress controller daemonset, service, RBAC roles, RBAC bindings, default backend, and namespace.
```
kubectl apply -R -f addons/nginx-ingress/digital-ocean
```
For each application, add a CNAME record resolving to the worker(s) DNS record. Use the Typhoon module's output `workers_dns` to find the worker DNS value. For example, you might use Terraform to manage a Google Cloud DNS record:
```tf
resource "google_dns_record_set" "some-application" {
# DNS zone name
managed_zone = "example-zone"
# DNS record
name = "app.example.com."
type = "CNAME"
ttl = 300
rrdatas = ["${module.digital-ocean-nemo.workers_dns}."]
}
```
[^1]: Digital Ocean does offer load balancers. We've opted not to use them to keep the Digital Ocean setup simple and cheap for developers.
## Google Cloud
On Google Cloud, a TCP Proxy load balancer distributes traffic across a backend service of worker nodes running an Ingress controller deployment. Firewall rules allow traffic to ports 80 and 443. Health check rules ensure only workers with a healthy Ingress controller receive traffic.
Create the Ingress controller deployment, service, RBAC roles, RBAC bindings, default backend, and namespace.
```
kubectl apply -R -f addons/nginx-ingress/google-cloud
```
For each application, add a DNS record resolving to the load balancer's IPv4 address.
```
app1.example.com -> 11.22.33.44
aap2.example.com -> 11.22.33.44
app3.example.com -> 11.22.33.44
```
Find the IPv4 address with `gcloud compute addresses list` or use the Typhoon module's output `ingress_static_ipv4`. For example, you might use Terraform to manage a Google Cloud DNS record:
```tf
resource "google_dns_record_set" "some-application" {
# DNS zone name
managed_zone = "example-zone"
# DNS record
name = "app.example.com."
type = "A"
ttl = 300
rrdatas = ["${module.google-cloud-yavin.ingress_static_ipv4}"]
}
```

87
docs/advanced/worker-pools.md
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@ -1,11 +1,12 @@
# Worker Pools
Typhoon AWS and Google Cloud allow additional groups of workers to be defined and joined to a cluster. For example, add worker pools of instances with different types, disk sizes, Container Linux channels, or preemptibility modes.
Typhoon AWS, Azure, and Google Cloud allow additional groups of workers to be defined and joined to a cluster. For example, add worker pools of instances with different types, disk sizes, Container Linux channels, or preemptibility modes.
Internal Terraform Modules:
* `aws/container-linux/kubernetes/workers`
* `aws/fedora-atomic/kubernetes/workers`
* `azure/container-linux/kubernetes/workers`
* `google-cloud/container-linux/kubernetes/workers`
* `google-cloud/fedora-atomic/kubernetes/workers`
@ -31,6 +32,7 @@ module "tempest-worker-pool" {
kubeconfig = "${module.aws-tempest.kubeconfig}"
ssh_authorized_key = "${var.ssh_authorized_key}"
# optional
count = 2
instance_type = "m5.large"
os_image = "coreos-beta"
@ -43,7 +45,7 @@ Apply the change.
terraform apply
```
Verify an auto-scaling group of workers join the cluster within a few minutes.
Verify an auto-scaling group of workers joins the cluster within a few minutes.
### Variables
@ -53,10 +55,10 @@ The AWS internal `workers` module supports a number of [variables](https://githu
| Name | Description | Example |
|:-----|:------------|:--------|
| name | Unique name (distinct from cluster name) | "tempest-m5s" |
| vpc_id | Must be set to `vpc_id` output by cluster | "${module.cluster.vpc_id}" |
| subnet_ids | Must be set to `subnet_ids` output by cluster | "${module.cluster.subnet_ids}" |
| security_groups | Must be set to `worker_security_groups` output by cluster | "${module.cluster.worker_security_groups}" |
| name | Unique name (distinct from cluster name) | "tempest-m5s" |
| kubeconfig | Must be set to `kubeconfig` output by cluster | "${module.cluster.kubeconfig}" |
| ssh_authorized_key | SSH public key for user 'core' | "ssh-rsa AAAAB3NZ..." |
@ -74,6 +76,76 @@ The AWS internal `workers` module supports a number of [variables](https://githu
Check the list of valid [instance types](https://aws.amazon.com/ec2/instance-types/) or per-region and per-type [spot prices](https://aws.amazon.com/ec2/spot/pricing/).
## Azure
Create a cluster following the Azure [tutorial](../cl/azure.md#cluster). Define a worker pool using the Azure internal `workers` module.
```tf
module "ramius-worker-pool" {
source = "git::https://github.com/poseidon/typhoon//azure/container-linux/kubernetes/workers?ref=v1.11.3"
providers = {
azurerm = "azurerm.default"
}
# Azure
region = "${module.azure-ramius.region}"
resource_group_name = "${module.azure-ramius.resource_group_name}"
subnet_id = "${module.azure-ramius.subnet_id}"
security_group_id = "${module.azure-ramius.security_group_id}"
backend_address_pool_id = "${module.azure-ramius.backend_address_pool_id}"
# configuration
name = "ramius-low-priority"
kubeconfig = "${module.azure-ramius.kubeconfig}"
ssh_authorized_key = "${var.ssh_authorized_key}"
# optional
count = 2
vm_type = "Standard_F4"
priority = "Low"
}
```
Apply the change.
```
terraform apply
```
Verify a scale set of workers joins the cluster within a few minutes.
### Variables
The Azure internal `workers` module supports a number of [variables](https://github.com/poseidon/typhoon/blob/master/azure/container-linux/kubernetes/workers/variables.tf).
#### Required
| Name | Description | Example |
|:-----|:------------|:--------|
| name | Unique name (distinct from cluster name) | "ramius-f4" |
| region | Must be set to `region` output by cluster | "${module.cluster.region}" |
| resource_group_name | Must be set to `resource_group_name` output by cluster | "${module.cluster.resource_group_name}" |
| subnet_id | Must be set to `subnet_id` output by cluster | "${module.cluster.subnet_id}" |
| security_group_id | Must be set to `security_group_id` output by cluster | "${module.cluster.security_group_id}" |
| backend_address_pool_id | Must be set to `backend_address_pool_id` output by cluster | "${module.cluster.backend_address_pool_id}" |
| kubeconfig | Must be set to `kubeconfig` output by cluster | "${module.cluster.kubeconfig}" |
| ssh_authorized_key | SSH public key for user 'core' | "ssh-rsa AAAAB3NZ..." |
#### Optional
| Name | Description | Default | Example |
|:-----|:------------|:--------|:--------|
| count | Number of instances | 1 | 3 |
| vm_type | Machine type for instances | "Standard_F1" | See below |
| os_image | Channel for a Container Linux derivative | coreos-stable | coreos-stable, coreos-beta, coreos-alpha |
| priority | Set priority to Low to use reduced cost surplus capacity, with the tradeoff that instances can be deallocated at any time | Regular | Low |
| clc_snippets | Container Linux Config snippets | [] | [example](/advanced/customization/#usage) |
| service_cidr | CIDR IPv4 range to assign to Kubernetes services | "10.3.0.0/16" | "10.3.0.0/24" |
| cluster_domain_suffix | FQDN suffix for Kubernetes services answered by coredns. | "cluster.local" | "k8s.example.com" |
Check the list of valid [machine types](https://azure.microsoft.com/en-us/pricing/details/virtual-machines/linux/) and their [specs](https://docs.microsoft.com/en-us/azure/virtual-machines/linux/sizes-general). Use `az vm list-skus` to get the identifier.
## Google Cloud
Create a cluster following the Google Cloud [tutorial](../cl/google-cloud.md#cluster). Define a worker pool using the Google Cloud internal `workers` module.
@ -87,7 +159,7 @@ module "yavin-worker-pool" {
}
# Google Cloud
region = "us-central1"
region = "europe-west2"
network = "${module.google-cloud-yavin.network_name}"
cluster_name = "yavin"
@ -96,6 +168,7 @@ module "yavin-worker-pool" {
kubeconfig = "${module.google-cloud-yavin.kubeconfig}"
ssh_authorized_key = "${var.ssh_authorized_key}"
# optional
count = 2
machine_type = "n1-standard-16"
os_image = "coreos-beta"
@ -129,13 +202,15 @@ The Google Cloud internal `workers` module supports a number of [variables](http
| Name | Description | Example |
|:-----|:------------|:--------|
| region | Must be set to `region` of cluster | "us-central1" |
| network | Must be set to `network_name` output by cluster | "${module.cluster.network_name}" |
| name | Unique name (distinct from cluster name) | "yavin-16x" |
| region | Region for the worker pool instances. May differ from the cluster's region | "europe-west2" |
| network | Must be set to `network_name` output by cluster | "${module.cluster.network_name}" |
| cluster_name | Must be set to `cluster_name` of cluster | "yavin" |
| kubeconfig | Must be set to `kubeconfig` output by cluster | "${module.cluster.kubeconfig}" |
| ssh_authorized_key | SSH public key for user 'core' | "ssh-rsa AAAAB3NZ..." |
Check the list of regions [docs](https://cloud.google.com/compute/docs/regions-zones/regions-zones) or with `gcloud compute regions list`.
#### Optional
| Name | Description | Default | Example |

2
docs/cl/azure.md
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@ -1,7 +1,7 @@
# Azure
!!! danger
Typhoon for Azure is alpha. Expect rough edges and changes.
Typhoon for Azure is alpha. For production, use AWS, Google Cloud, or bare-metal. As Azure matures, check [errata](https://github.com/poseidon/typhoon/wiki/Errata) for known shortcomings.
In this tutorial, we'll create a Kubernetes v1.11.2 cluster on Azure with Container Linux.