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https://github.com/briandenicola/aks-with-istio
An opinionated point of view of AKS in Azure
https://github.com/briandenicola/aks-with-istio
fluxcd gitops istio kubernetes terraform
Last synced: about 1 month ago
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An opinionated point of view of AKS in Azure
- Host: GitHub
- URL: https://github.com/briandenicola/aks-with-istio
- Owner: briandenicola
- License: mit
- Created: 2021-09-03T19:27:48.000Z (over 3 years ago)
- Default Branch: main
- Last Pushed: 2024-05-30T17:35:13.000Z (7 months ago)
- Last Synced: 2024-05-30T20:30:53.939Z (7 months ago)
- Topics: fluxcd, gitops, istio, kubernetes, terraform
- Language: HCL
- Homepage:
- Size: 427 KB
- Stars: 2
- Watchers: 1
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Overview
This repository is covers how to stand up a public (but secure) AKS/Kubernetes cluster with Istio. This code is an opiniated method of applying the standards into an end to end solution using Terraform, Flux and Istio configuration.
## Cluster Design
* Public cluster with Azure AD RBAC enabled and API Server IP Restricted
* 2 node pools with Azure Linux as the Node OS
* One system node pool
* One node pool for applications
* Azure Managed Service Mesh with Internal Ingress Controller
* [Azure CNI Overlay](https://learn.microsoft.com/en-us/azure/aks/azure-cni-overlay) network with [Cilium Dataplane](https://learn.microsoft.com/en-us/azure/aks/azure-cni-powered-by-cilium)
* Cluster Identity - User Managed Identity
* Kubelet Identity - User Managed Identity
* [Node Image OS Updater](https://learn.microsoft.com/en-us/azure/aks/node-image-upgrade)
* [Maintenace Schedule Setup](https://learn.microsoft.com/en-us/azure/aks/planned-maintenance) for weekly updates
* Integrated with Azure Monitor Workspaces/Prometheus and Azure Managed Grafana Service
## Cluster Extensions
* Flux
* Dapr
* KEDA
## Extensions Added by Flux
* Knative
* KubeCost
* Kured
### Diagram
# Prerequisites
_Use DevContainer with Github Codespaces_
* Fork then Clone the git repository to your own GitHub account
* Azure subscription with Owner access permissions
* [AKS Preview Features](https://github.com/briandenicola/kubernetes-cluster-setup/blob/main/scripts/aks-preview-features.sh)
* Script requires `/usr/bin/watch` which is not part of the default bash shell on macos.
* Run `brew install watch` to install on macos
* [Azure Cli](https://learn.microsoft.com/en-us/cli/azure/install-azure-cli)
* [Terraform](https://developer.hashicorp.com/terraform/downloads)
* [flux](https://fluxcd.io/flux/installation/)
* [Taskfile](https://taskfile.dev/installation)
* A TLS Certificate in TLS format
# Deployment - Default Region (South Central)
```bash
vi .env
CERT_PFX_PASS=
CERT_PATH=
az login
task up
```
> **_NOTE:_** Task will automatically update [zipkin](https://github.com/briandenicola/aks-with-istio/blob/main/clusters/common/istio/configuration/zipkin.tmpl) with the proper App Insights workspace ID. Otherwise this will have be to manually updated.
## Deployment - Alternate Region
```bash
vi .env
CERT_PFX_PASS=
CERT_PATH=
az login
task up -- northcentralus
```
## Sample Run
```
$ task up
task: [init] terraform -chdir=./infrastructure workspace new southcentralus || true
...
task: [init] terraform -chdir=./infrastructure workspace select southcentralus
task: [init] terraform -chdir=./infrastructure init
task: [apply] terraform -chdir=./infrastructure apply -auto-approve -var "region=southcentralus"
data.http.myip: Reading...
data.http.myip: Read complete after 0s [id=http://checkip.amazonaws.com/]
data.azurerm_client_config.current: Reading...
data.azurerm_subscription.current: Reading...
data.azurerm_client_config.current: Read complete after 0s
...
Plan: 41 to add, 0 to change, 0 to destroy.
Changes to Outputs:
+ AI_INSTRUMENTATION_KEY = (sensitive value)
+ AKS_CLUSTER_NAME = (known after apply)
+ AKS_RESOURCE_GROUP = (known after apply)
random_integer.services_cidr: Creating...
random_pet.this: Creating...
random_integer.pod_cidr: Creating...
random_integer.vnet_cidr: Creating...
random_id.this: Creating...
random_integer.pod_cidr: Creation complete after 0s [id=102]
random_integer.vnet_cidr: Creation complete after 0s [id=58]
random_id.this: Creation complete after 0s [id=C3Y]
random_pet.this: Creation complete after 0s [id=beagle]
random_integer.services_cidr: Creation complete after 0s [id=70]
azurerm_resource_group.this: Creating...
....
Apply complete! Resources: 4 added, 1 changed, 0 destroyed.
Outputs:
AI_INSTRUMENTATION_KEY =
AKS_CLUSTER_NAME = "drum-271-aks"
AKS_RESOURCE_GROUP = "drum-271_rg"
task: [creds] az aks get-credentials -g drum-271_rg -n drum-271-aks --overwrite-existing
The behavior of this command has been altered by the following extension: aks-preview
Merged "drum-271-aks" as current context in /home/admin/.kube/config
task: [creds] kubelogin convert-kubeconfig -l azurecli
task: [appinsights] export AI_INSTRUMENTATION_KEY=b710e469-894b-45c4-b0d3-ce331c7d7be0 ; envsubst < clusters/common/istio/configuration/zipkin.tmpl > clusters/common/istio/configuration/zipkin.yaml
task: [appinsights] git add clusters/common/istio/configuration/zipkin.yaml
task: [appinsights] git commit -m "Updated AI_INSTRUMENTATION_KEY value"
[main 9c6615b] Updated AI_INSTRUMENTATION_KEY value
1 file changed, 110 insertions(+)
create mode 100644 clusters/common/istio/configuration/zipkin.yaml
task: [appinsights] git push
Enumerating objects: 12, done.
Counting objects: 100% (12/12), done.
Delta compression using up to 8 threads
Compressing objects: 100% (7/7), done.
Writing objects: 100% (7/7), 1.34 KiB | 1.34 MiB/s, done.
Total 7 (delta 3), reused 0 (delta 0)
remote: Resolving deltas: 100% (3/3), completed with 3 local objects.
remote: This repository moved. Please use the new location:
remote: [email protected]:sampleuser/aks-with-istio.git
```
# Validate
```bash
task cluster
task pods
```
## Sample Ouput
```
$ task cluster
task: [cluster] kubectl config use-context drum-271-aks
task: [cluster] kubectl config use-context drum-271-aks
Switched to context "drum-271-aks".
task: [cluster] az aks show -n drum-271-aks -g drum-271_rg -o table
The behavior of this command has been altered by the following extension: aks-preview
Name Location ResourceGroup KubernetesVersion CurrentKubernetesVersion ProvisioningState Fqdn
------------ -------------- --------------- ------------------- -------------------------- ------------------- --------------------------------------------------
drum-271-aks southcentralus drum-271_rg 1.27.1 1.27.1 Succeeded drum-271-aks-n7hb3lze.hcp.southcentralus.azmk8s.io
task: [cluster] az aks nodepool list --cluster-name drum-271-aks -g drum-271_rg -o table
The behavior of this command has been altered by the following extension: aks-preview
Name OsType VmSize Count MaxPods ProvisioningState Mode
------ -------- ----------------- ------- --------- ------------------- ------
apps Linux Standard_D4ads_v5 3 250 Succeeded User
system Linux Standard_D4ads_v5 3 60 Succeeded System
task: [cluster] kubectl get nodes -o wide -L kubernetes.azure.com/node-image-version
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME NODE-IMAGE-VERSION
aks-apps-60142216-vmss000000 Ready agent 18m v1.27.1 10.135.2.10 CBL-Mariner/Linux 5.15.116.1-2.cm2 containerd://1.6.18 AKSCBLMariner-V2gen2-202308.01.0
aks-apps-60142216-vmss000001 Ready agent 18m v1.27.1 10.135.2.8 CBL-Mariner/Linux 5.15.116.1-2.cm2 containerd://1.6.18 AKSCBLMariner-V2gen2-202308.01.0
aks-apps-60142216-vmss000003 Ready agent 18m v1.27.1 10.135.2.11 CBL-Mariner/Linux 5.15.116.1-2.cm2 containerd://1.6.18 AKSCBLMariner-V2gen2-202308.01.0
aks-system-15785595-vmss000000 Ready agent 34m v1.27.1 10.135.2.6 CBL-Mariner/Linux 5.15.116.1-2.cm2 containerd://1.6.18 AKSCBLMariner-V2gen2-202308.01.0
aks-system-15785595-vmss000001 Ready agent 34m v1.27.1 10.135.2.4 CBL-Mariner/Linux 5.15.116.1-2.cm2 containerd://1.6.18 AKSCBLMariner-V2gen2-202308.01.0
aks-system-15785595-vmss000003 Ready agent 35m v1.27.1 10.135.2.7 CBL-Mariner/Linux 5.15.116.1-2.cm2 containerd://1.6.18 AKSCBLMariner-V2gen2-202308.01.0
task: [cluster] kubectl get --raw='/readyz?verbose'
[+]ping ok
[+]log ok
[+]etcd ok
[+]etcd-readiness ok
[+]informer-sync ok
[+]poststarthook/start-kube-apiserver-admission-initializer ok
[+]poststarthook/generic-apiserver-start-informers ok
[+]poststarthook/priority-and-fairness-config-consumer ok
...
[+]poststarthook/apiservice-openapi-controller ok
[+]poststarthook/apiservice-openapiv3-controller ok
[+]poststarthook/apiservice-discovery-controller ok
[+]shutdown ok
readyz check passed
$ task pods
task: [pods] kubectl -n aks-istio-ingress get pods,services,deployments
NAME READY STATUS RESTARTS AGE
pod/default-backend-6f498f47dc-k4sqc 2/2 Running 0 2m53s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/default-backend-svc ClusterIP 100.70.84.44 80/TCP 2m53s
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/default-backend 1/1 1 1 2m53s
task: [pods] kubectl -n aks-istio-ingress get pods,services,deployments
NAME READY STATUS RESTARTS AGE
pod/aks-istio-ingressgateway-internal-579c5d8d4b-hpwjs 1/1 Running 0 24m
pod/aks-istio-ingressgateway-internal-579c5d8d4b-mgs67 1/1 Running 0 24m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/aks-istio-ingressgateway-internal LoadBalancer 100.70.240.168 10.135.2.5 15021:30275/TCP,80:31960/TCP,443:31402/TCP 24m
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/aks-istio-ingressgateway-internal 2/2 2 2 24m
task: [pods] kubectl -n aks-istio-system get pods,services,deployments
NAME READY STATUS RESTARTS AGE
pod/istiod-asm-1-17-5c577b879b-2k979 1/1 Running 0 24m
pod/istiod-asm-1-17-5c577b879b-6lckm 1/1 Running 0 24m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/istiod-asm-1-17 ClusterIP 100.70.69.53 15010/TCP,15012/TCP,443/TCP,15014/TCP 24m
service/knative-local-gateway ClusterIP 100.70.43.120 80/TCP 2m51s
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/istiod-asm-1-17 2/2 2 2 24m
task: [pods] kubectl -n knative-serving get pods,services,deployments
NAME READY STATUS RESTARTS AGE
pod/activator-5846f4cff6-tm2kn 1/1 Running 0 2m52s
pod/autoscaler-6878b897db-46qrf 1/1 Running 0 2m52s
pod/controller-84bd779f54-ph2hw 1/1 Running 0 2m52s
pod/domain-mapping-7c69c4bf7-87td2 1/1 Running 0 2m52s
pod/domainmapping-webhook-579fb45448-mk2n5 1/1 Running 0 2m51s
pod/net-istio-controller-7888cf8dfc-9pgkg 1/1 Running 0 2m51s
pod/net-istio-webhook-6569bdd678-f7nrp 1/1 Running 0 2m51s
pod/webhook-5c95f98fb5-lxq9f 1/1 Running 0 2m51s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/activator-service ClusterIP 100.70.181.113 9090/TCP,8008/TCP,80/TCP,81/TCP,443/TCP 2m52s
service/autoscaler ClusterIP 100.70.179.46 9090/TCP,8008/TCP,8080/TCP 2m52s
service/autoscaler-bucket-00-of-01 ClusterIP 100.70.58.91 8080/TCP 2m47s
service/controller ClusterIP 100.70.66.102 9090/TCP,8008/TCP 2m52s
service/domainmapping-webhook ClusterIP 100.70.78.51 9090/TCP,8008/TCP,443/TCP 2m52s
service/net-istio-webhook ClusterIP 100.70.88.158 9090/TCP,8008/TCP,443/TCP 2m52s
service/webhook ClusterIP 100.70.254.180 9090/TCP,8008/TCP,443/TCP 2m52s
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/activator 1/1 1 1 2m52s
deployment.apps/autoscaler 1/1 1 1 2m52s
deployment.apps/controller 1/1 1 1 2m52s
deployment.apps/domain-mapping 1/1 1 1 2m52s
deployment.apps/domainmapping-webhook 1/1 1 1 2m52s
deployment.apps/net-istio-controller 1/1 1 1 2m52s
deployment.apps/net-istio-webhook 1/1 1 1 2m51s
deployment.apps/webhook 1/1 1 1 2m51s
task: [pods] kubectl -n apps get pods,services,deployments
NAME READY STATUS RESTARTS AGE
pod/httpbin-6d7f66fbdd-8kwkv 2/2 Running 0 2m55s
pod/httpbin-6d7f66fbdd-drqr5 2/2 Running 0 2m55s
pod/httpbin-6d7f66fbdd-lr5ll 2/2 Running 0 2m55s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/httpbinsvc ClusterIP 100.70.11.75 80/TCP 2m55s
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/httpbin 3/3 3 3 2m55s
task: [pods] kubectl -n bookstore get pods,services,deployments
NAME READY STATUS RESTARTS AGE
pod/details-v1-6448f9bdc8-962mw 2/2 Running 0 2m55s
pod/productpage-v1-65b8499c86-snbhz 2/2 Running 0 2m55s
pod/ratings-v1-56687d6766-7ww87 2/2 Running 0 2m55s
pod/reviews-v1-5c785db578-9tn6z 2/2 Running 0 2m55s
pod/reviews-v2-6d8c88978b-rw76x 2/2 Running 0 2m55s
pod/reviews-v3-678b968858-r5rqw 2/2 Running 0 2m55s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/details ClusterIP 100.70.202.241 9080/TCP 2m56s
service/productpage ClusterIP 100.70.61.243 9080/TCP 2m56s
service/ratings ClusterIP 100.70.94.134 9080/TCP 2m56s
service/reviews ClusterIP 100.70.175.49 9080/TCP 2m56s
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/details-v1 1/1 1 1 2m56s
deployment.apps/productpage-v1 1/1 1 1 2m56s
deployment.apps/ratings-v1 1/1 1 1 2m56s
deployment.apps/reviews-v1 1/1 1 1 2m56s
deployment.apps/reviews-v2 1/1 1 1 2m56s
deployment.apps/reviews-v3 1/1 1 1 2m56s
task: [pods] kubectl -n kube-system get pods,services,deployments
NAME READY STATUS RESTARTS AGE
pod/aks-secrets-store-csi-driver-9c2vs 3/3 Running 0 26m
pod/aks-secrets-store-csi-driver-hmrgw 3/3 Running 0 27m
pod/aks-secrets-store-csi-driver-jcgsk 3/3 Running 0 10m
....
pod/microsoft-defender-publisher-ds-tm6wb 1/1 Running 0 10m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/ama-metrics-ksm ClusterIP 100.70.169.25 8080/TCP 25m
service/azure-policy-webhook-service ClusterIP 100.70.5.120 443/TCP 27m
service/azure-wi-webhook-webhook-service ClusterIP 100.70.150.82 443/TCP 27m
service/extension-agent-metrics-service ClusterIP 100.70.135.112 8443/TCP 8m32s
service/extension-operator-metrics-service ClusterIP 100.70.8.82 8443/TCP 8m32s
service/kappie-svc ClusterIP 100.70.210.155 10093/TCP 20m
service/keda-admission-webhooks ClusterIP 100.70.207.25 443/TCP 25m
service/keda-operator ClusterIP 100.70.92.15 9666/TCP 25m
service/keda-operator-metrics-apiserver ClusterIP 100.70.24.77 443/TCP,8080/TCP 25m
service/kube-dns ClusterIP 100.70.0.10 53/UDP,53/TCP 27m
service/metrics-server ClusterIP 100.70.50.168 443/TCP 27m
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/ama-logs-rs 1/1 1 1 25m
deployment.apps/ama-metrics 1/1 1 1 25m
deployment.apps/ama-metrics-ksm 1/1 1 1 25m
deployment.apps/azure-policy 1/1 1 1 27m
deployment.apps/azure-policy-webhook 1/1 1 1 27m
deployment.apps/azure-wi-webhook-controller-manager 2/2 2 2 27m
deployment.apps/coredns 2/2 2 2 27m
deployment.apps/coredns-autoscaler 1/1 1 1 27m
deployment.apps/eraser-controller-manager 1/1 1 1 25m
deployment.apps/extension-agent 1/1 1 1 8m32s
deployment.apps/extension-operator 1/1 1 1 8m32s
deployment.apps/keda-admission-webhooks 2/2 2 2 25m
deployment.apps/keda-operator 2/2 2 2 25m
deployment.apps/keda-operator-metrics-apiserver 2/2 2 2 25m
deployment.apps/konnectivity-agent 2/2 2 2 27m
deployment.apps/metrics-server 2/2 2 2 27m
deployment.apps/microsoft-defender-collector-misc 1/1 1 1 27m
task: [pods] flux get all
NAME REVISION SUSPENDED READY MESSAGE
gitrepository/aks-flux-extension main@sha1:9c6615bf False True stored artifact for revision 'main@sha1:9c6615bf'
NAME REVISION SUSPENDED READY MESSAGE
helmrepository/kubecost sha256:f4b43667 False True stored artifact: revision 'sha256:f4b43667'
helmrepository/kubereboot sha256:c8866812 False True stored artifact: revision 'sha256:c8866812'
NAME REVISION SUSPENDED READY MESSAGE
helmchart/flux-system-kubecost-release 1.101.3 False True pulled 'cost-analyzer' chart with version '1.101.3'
helmchart/flux-system-kured-release 4.0.2 False True pulled 'kured' chart with version '4.0.2'
NAME REVISION SUSPENDED READY MESSAGE
helmrelease/kubecost-release 1.101.3 False True Release reconciliation succeeded
helmrelease/kured-release 4.0.2 False True Release reconciliation succeeded
NAME REVISION SUSPENDED READY MESSAGE
kustomization/aks-flux-extension-apps main@sha1:9c6615bf False True Applied revision: main@sha1:9c6615bf
kustomization/aks-flux-extension-istio-cfg main@sha1:9c6615bf False True Applied revision: main@sha1:9c6615bf
kustomization/aks-flux-extension-istio-crd main@sha1:9c6615bf False True Applied revision: main@sha1:9c6615bf
kustomization/aks-flux-extension-istio-gw main@sha1:9c6615bf False True Applied revision: main@sha1:9c6615bf
kustomization/bookstore-app main@sha1:9c6615bf False True Applied revision: main@sha1:9c6615bf
kustomization/httpbin-app main@sha1:9c6615bf False True Applied revision: main@sha1:9c6615bf
kustomization/knative main@sha1:9c6615bf False True Applied revision: main@sha1:9c6615bf
```
# Clean Up
```bash
task clean
```