Azure SQL failover group using Bicep - azure

Question

I am trying to implement Azure SQL failover group using Bicep templates. The problem I have is, I am unable to figure out how to reference array of databases passed as parameter in failover group's database property. When assigning array values to database property it gives me an error of expecting string values whereas assigned was array, which of course isn't correct.
resource symbolicname 'Microsoft.Sql/servers/failoverGroups#2021-11-01-preview' = {
name: 'string'
tags: {
tagName1: 'tagValue1'
tagName2: 'tagValue2'
}
parent: resourceSymbolicName
properties: {
databases: [
'string'
]
partnerServers: [
{
id: 'string'
}
]
readWriteEndpoint: {
failoverPolicy: 'string'
failoverWithDataLossGracePeriodMinutes: int
}
}
}
Does anyone have any working example of Azure SQL failover group using Bicep templates or point me in the right direction on the solution?
Edit 1 - main.bicep :
This is the code that I am trying after adding Thomas's changes:
param databases array
param primarySqlServerName string
param drSqlServerName string
param failovergroupName string
module primarySql '***************' = {
Deploy primary SQL Server and database
}
module drSql '****************' = {
Deploy secondary SQL Server
}
resource sqlServerFailoverGroup 'Microsoft.Sql/servers/failoverGroups#2020-11-01-preview' = {
name: '${primarySqlServerName}/${failovergroupName}'
properties: {
databases: [for database in databases: resourceId('Microsoft.Sql/servers/databases', primarySqlServerName, database)]
readWriteEndpoint: {
failoverPolicy: 'Automatic'
failoverWithDataLossGracePeriodMinutes: 60
}
readOnlyEndpoint: {
failoverPolicy: 'Enabled'
}
partnerServers: [
{
id: resourceId('Microsoft.Sql/servers', drSqlServerName)
}
]
}
dependsOn: [
primarySql
drSql
]
}
Getting below error while deploying above:
Unable to process template language expressions for resource at line
'1' and column '1289'. 'Unable to evaluate template language function
'resourceId': all function arguments must be string literals. Please
see aka.ms/arm-template-expressions/#resourceid for usage details.

Answer 1

The databases property is an of string. The partnerServers property is an array of object.
Both expect the resource id of the databases and partner servers.
Here is a simple sample of deploying 2 sql servers and databases with a failover group
sql.bicep:
param location string = resourceGroup().location
param sqlServerName string
param sqlServerPrincipalType string
param sqlServerAadAdminName string
param sqlServerAadAdminId string
param databaseNames array
// Create the Server
resource sqlServer 'Microsoft.Sql/servers#2020-11-01-preview' = {
name: sqlServerName
location: location
tags: {}
properties: {
administrators: {
administratorType: 'ActiveDirectory'
principalType: sqlServerPrincipalType
login: sqlServerAadAdminName
sid: sqlServerAadAdminId
azureADOnlyAuthentication: true
}
}
}
// We create the database only in the primary region
resource database 'Microsoft.Sql/servers/databases#2020-08-01-preview' = [for databaseName in databaseNames: if (!empty(databaseNames)) {
name: '${sqlServer.name}/${empty(databaseNames) ? 'placeholder' : databaseName}'
location: location
sku: {
name: 'S0'
tier: 'Standard'
}
properties: {
sourceDatabaseId: sqlServer.id
}
}]
and the main.bicep file:
param failoverGroupName string
param primarySqlServerName string
param primaryLocation string
param secondarySqlServerName string
param secondaryLocation string
param sqlServerPrincipalType string
param sqlServerAadAdminName string
param sqlServerAadAdminId string
param databaseNames array
module primarySql 'sql.bicep' = {
name: 'primarySql'
params: {
location: primaryLocation
sqlServerName: primarySqlServerName
sqlServerPrincipalType: sqlServerPrincipalType
sqlServerAadAdminName: sqlServerAadAdminName
sqlServerAadAdminId: sqlServerAadAdminId
databaseNames: databaseNames
}
}
module secondarySql 'sql.bicep' = {
name: 'secondarySql'
params: {
location: secondaryLocation
sqlServerName: secondarySqlServerName
sqlServerPrincipalType: sqlServerPrincipalType
sqlServerAadAdminName: sqlServerAadAdminName
sqlServerAadAdminId: sqlServerAadAdminId
databaseNames: []
}
}
resource sqlServerFailoverGroup 'Microsoft.Sql/servers/failoverGroups#2020-11-01-preview' = {
name: '${primarySqlServerName}/${failoverGroupName}'
dependsOn: [ primarySql, secondarySql ]
properties: {
databases: [for dataBaseName in databaseNames: resourceId('Microsoft.Sql/servers/databases', primarySqlServerName, dataBaseName)]
readWriteEndpoint: {
failoverPolicy: 'Automatic'
failoverWithDataLossGracePeriodMinutes: 60
}
readOnlyEndpoint: {
failoverPolicy: 'Enabled'
}
partnerServers: [
{
id: resourceId(resourceGroup().name, 'Microsoft.Sql/servers', secondarySqlServerName)
}
]
}
}