From ec36169cab64ef187b4ebe5ec348206b65a7a1f5 Mon Sep 17 00:00:00 2001
From: Daniel Larsen <dalars@microsoft.com>
Date: Fri, 19 Mar 2021 13:55:24 +1300
Subject: [PATCH] #7 multi-region support

---
 deploy/_vars.ps1           |  8 +++++++
 deploy/deploy-azure.ps1    | 43 ++++++++------------------------------
 deploy/deploy-function.ps1 | 29 +++++++++++++++++++++++++
 3 files changed, 46 insertions(+), 34 deletions(-)
 create mode 100644 deploy/deploy-function.ps1

diff --git a/deploy/_vars.ps1 b/deploy/_vars.ps1
index e69de29..b72f949 100644
--- a/deploy/_vars.ps1
+++ b/deploy/_vars.ps1
@@ -0,0 +1,8 @@
+$location = 'australiaeast'
+$loc = 'aue'
+$rg = 'numberservice-rg'
+$tags = 'project=NumberService', 'repo=DanielLarsenNZ/NumberService'
+$insights = 'numberservice-insights'
+$cosmos = 'numberservice'
+$cosmosDB = 'NumberService'
+$container='Numbers'
diff --git a/deploy/deploy-azure.ps1 b/deploy/deploy-azure.ps1
index d3fc910..d253430 100644
--- a/deploy/deploy-azure.ps1
+++ b/deploy/deploy-azure.ps1
@@ -1,21 +1,11 @@
 # Deploy NumberService resources
-
 $ErrorActionPreference = 'Stop'
+. ./_vars.ps1
 
-$location = 'australiaeast'
-$loc = 'aue'
-$rg = 'numberservice-rg'
-$tags = 'project=NumberService', 'repo=DanielLarsenNZ/NumberService'
-$cosmos = 'numberservice'
-$cosmosDB = 'NumberService'
 $throughput = 400
-$container='Numbers'
 $pk = '/id'
-$insights = 'numberservice-insights'
-$functionApp = "numberservice-$loc"
-$repo = 'https://github.com/DanielLarsenNZ/NumberService.git'
-$storage = "numservfn$loc"
-
+$primaryCosmosLocation = 'australiaeast'
+$secondaryCosmosLocation = 'australiasoutheast'
 
 # RESOURCE GROUP
 az group create -n $rg --location $location --tags $tags
@@ -23,28 +13,13 @@ az group create -n $rg --location $location --tags $tags
 
 # COSMOS DB ACCOUNT
 az cosmosdb create -n $cosmos -g $rg --default-consistency-level Session `
-    --locations regionName=$location failoverPriority=0 isZoneRedundant=True
+    --locations regionName=$primaryCosmosLocation failoverPriority=0 isZoneRedundant=True `
+    --locations regionName=$secondaryCosmosLocation failoverPriority=1 isZoneRedundant=False `
+    --enable-automatic-failover $true `
+    --enable-multiple-write-locations $true
 az cosmosdb sql database create -a $cosmos -g $rg -n $cosmosDB --throughput $throughput
 az cosmosdb sql container create -a $cosmos -g $rg -d $cosmosDB -n $container -p $pk
-$connString = ( az cosmosdb keys list -n $cosmos -g $rg --type 'connection-strings' | ConvertFrom-Json ).connectionStrings[0].connectionString
-
-
-# STORAGE ACCOUNT
-az storage account create -n $storage -g $rg --tags $tags --location $location --sku 'Standard_LRS'
-
+$env:NUMBERS_COSMOS_CONNSTRING = ( az cosmosdb keys list -n $cosmos -g $rg --type 'connection-strings' | ConvertFrom-Json ).connectionStrings[0].connectionString
 
 # APPLICATION INSIGHTS
-$instrumentationKey = ( az monitor app-insights component create --app $insights --location $location -g $rg --tags $tags | ConvertFrom-Json ).instrumentationKey
-
-
-# FUNCTION APP
-az functionapp create -n $functionApp -g $rg --consumption-plan-location $location --functions-version 3 `
-    --app-insights $insights --app-insights-key $instrumentationKey -s $storage
-az functionapp config appsettings set -n $functionApp -g $rg --settings `
-    "CosmosDbConnectionString=$connString" `
-    "CosmosDbDatabaseId=$cosmosDB" `
-    "CosmosDbContainerId=$container"
-az functionapp deployment source config -n $functionApp -g $rg --repo-url $repo --branch 'main'
-
-# Tear down
-# az group delete -n $rg --yes
\ No newline at end of file
+$env:NUMBERS_APP_INSIGHTS_IKEY = ( az monitor app-insights component create --app $insights --location $location -g $rg --tags $tags | ConvertFrom-Json ).instrumentationKey
diff --git a/deploy/deploy-function.ps1 b/deploy/deploy-function.ps1
new file mode 100644
index 0000000..2cdf047
--- /dev/null
+++ b/deploy/deploy-function.ps1
@@ -0,0 +1,29 @@
+[CmdletBinding()]
+param (
+    [Parameter(Mandatory = $true)] [ValidateSet('australiaeast', 'australiasoutheast')] $FunctionLocation
+)
+
+. ./_vars.ps1
+
+$loc = switch ($FunctionLocation) {
+    'australiaeast' { 'aue' }
+    'australiasoutheast' { 'ase' }
+    default { throw "$FunctionLocation is not supported" }
+}
+
+$functionApp = "numberservice-$loc"
+$repo = 'https://github.com/DanielLarsenNZ/NumberService.git'
+$storage = "numservfn$loc"
+
+# STORAGE ACCOUNT
+az storage account create -n $storage -g $rg --tags $tags --location $FunctionLocation --sku 'Standard_LRS'
+
+
+# FUNCTION APP
+az functionapp create -n $functionApp -g $rg --consumption-plan-location $FunctionLocation --functions-version 3 `
+    --app-insights $insights --app-insights-key $env:NUMBERS_APP_INSIGHTS_IKEY -s $storage
+az functionapp config appsettings set -n $functionApp -g $rg --settings `
+    "CosmosDbConnectionString=$env:NUMBERS_COSMOS_CONNSTRING" `
+    "CosmosDbDatabaseId=$cosmosDB" `
+    "CosmosDbContainerId=$container"
+az functionapp deployment source config -n $functionApp -g $rg --repo-url $repo --branch 'main'