Deploy Coder on Azure with an Application Gateway

In certain enterprise environments, the Azure Application Gateway is required.

These steps serve as a proof-of-concept example so that you can get Coder running with Kubernetes on Azure. Your deployment might require a separate Postgres server or signed certificates.

The Application Gateway supports:

• Websocket traffic (required for workspace connections)
• TLS termination

Refer to Microsoft's documentation on how to enable application gateway ingress controller add-on for an existing AKS cluster with an existing application gateway. The steps here follow the Microsoft tutorial for a Coder deployment.

Deploy Coder on Azure with an Application Gateway

1. Create Azure resource group:

   az group create --name myResourceGroup --location eastus
   

2. Create AKS cluster:

   az aks create --name myCluster --resource-group myResourceGroup --network-plugin azure --enable-managed-identity --generate-ssh-keys
   

3. Create public IP:

   az network public-ip create --name myPublicIp --resource-group myResourceGroup --allocation-method Static --sku Standard
   

4. Create VNet and subnet:

   az network vnet create --name myVnet --resource-group myResourceGroup --address-prefix 10.0.0.0/16 --subnet-name mySubnet --subnet-prefix 10.0.0.0/24
   

5. Create Azure application gateway, attach VNet, subnet and public IP:

   az network application-gateway create --name myApplicationGateway --resource-group myResourceGroup --sku Standard_v2 --public-ip-address myPublicIp --vnet-name myVnet --subnet mySubnet --priority 100
   

6. Get app gateway ID:

   appgwId=$(az network application-gateway show --name myApplicationGateway --resource-group myResourceGroup -o tsv --query "id")
   

7. Enable app gateway ingress to AKS cluster:

   az aks enable-addons --name myCluster --resource-group myResourceGroup --addon ingress-appgw --appgw-id $appgwId
   

8. Get AKS node resource group:

   nodeResourceGroup=$(az aks show --name myCluster --resource-group myResourceGroup -o tsv --query "nodeResourceGroup")
   

9. Get AKS VNet name:

   aksVnetName=$(az network vnet list --resource-group $nodeResourceGroup -o tsv --query "[0].name")
   

10. Get AKS VNet ID:

    aksVnetId=$(az network vnet show --name $aksVnetName --resource-group $nodeResourceGroup -o tsv --query "id")
    

11. Peer VNet to AKS VNet:

    az network vnet peering create --name AppGWtoAKSVnetPeering --resource-group myResourceGroup --vnet-name myVnet --remote-vnet $aksVnetId --allow-vnet-access
    

12. Get app gateway VNet ID:

    appGWVnetId=$(az network vnet show --name myVnet --resource-group myResourceGroup -o tsv --query "id")
    

13. Peer AKS VNet to app gateway VNet:

    az network vnet peering create --name AKStoAppGWVnetPeering --resource-group $nodeResourceGroup --vnet-name $aksVnetName --remote-vnet $appGWVnetId --allow-vnet-access
    

14. Get AKS credentials:

    az aks get-credentials --name myCluster --resource-group myResourceGroup
    

15. Create Coder namespace:

    kubectl create ns coder
    

16. Deploy non-production PostgreSQL instance to AKS cluster:

    helm repo add bitnami https://charts.bitnami.com/bitnami
    helm install coder-db bitnami/postgresql \
    --namespace coder \
    --set auth.username=coder \
    --set auth.password=coder \
    --set auth.database=coder \
    --set persistence.size=10Gi
    

17. Create the PostgreSQL secret:

    kubectl create secret generic coder-db-url -n coder --from-literal=url="postgres://coder:[email protected]:5432/coder?sslmode=disable"
    

18. Deploy Coder to AKS cluster:

    helm repo add coder-v2 https://helm.coder.com/v2
    helm install coder coder-v2/coder \
        --namespace coder \
     --values values.yaml \
     --version 2.18.5
    

19. Clean up Azure resources:

    az group delete --name myResourceGroup
    az group delete --name MC_myResourceGroup_myCluster_eastus
    

20. Deploy the gateway - this needs clarification

21. After you deploy the gateway, add the following entries to Helm's values.yaml file before you deploy Coder:

      service:
        enable: true
        type: ClusterIP
        sessionAffinity: None
        externalTrafficPolicy: Cluster
        loadBalancerIP: ""
        annotations: {}
        httpNodePort: ""
        httpsNodePort: ""
    
      ingress:
        enable: true
        className: "azure-application-gateway"
        host: ""
        wildcardHost: ""
        annotations: {}
        tls:
          enable: false
          secretName: ""
          wildcardSecretName: ""