Create a database and graph for Azure Cosmos DB - API for Gremlin

APPLIES TO: Gremlin

Note

We recommend that you use the Azure Az PowerShell module to interact with Azure. To get started, see Install Azure PowerShell. To learn how to migrate to the Az PowerShell module, see Migrate Azure PowerShell from AzureRM to Az.

This sample requires Azure PowerShell Az 5.4.0 or later. Run Get-Module -ListAvailable Az to see which versions are installed. If you need to install, see Install Azure PowerShell module.

Run Connect-AzAccount to sign in to Azure.

Sample script

# Reference: Az.CosmosDB | https://docs.microsoft.com/powershell/module/az.cosmosdb
# --------------------------------------------------
# Purpose
# Create Cosmos Gremlin API account, database, and graph
# with dedicated throughput and conflict resolution policy
# with last writer wins and custom resolver path
# --------------------------------------------------
Function New-RandomString{Param ([Int]$Length = 10) return $(-join ((97..122) + (48..57) | Get-Random -Count $Length | ForEach-Object {[char]$_}))}
# --------------------------------------------------
$uniqueId = New-RandomString -Length 7 # Random alphanumeric string for unique resource names
$apiKind = "Gremlin"
# --------------------------------------------------
# Variables - ***** SUBSTITUTE YOUR VALUES *****
$locations = @()
$locations += New-AzCosmosDBLocationObject -LocationName "East Us" -FailoverPriority 0 -IsZoneRedundant 0
$locations += New-AzCosmosDBLocationObject -LocationName "West Us" -FailoverPriority 1 -IsZoneRedundant 0

$resourceGroupName = "myResourceGroup" # Resource Group must already exist
$accountName = "cosmos-$uniqueId" # Must be all lower case
$consistencyLevel = "Session"
$tags = @{Tag1 = "MyTag1"; Tag2 = "MyTag2"; Tag3 = "MyTag3"}
$databaseName = "myDatabase"
$graphName = "myGraph"
$graphRUs = 400
$partitionKeys = @("/myPartitionKey")
# --------------------------------------------------
$conflictResolutionPath = "/_ts"
# --------------------------------------------------
Write-Host "Creating account $accountName"
$account = New-AzCosmosDBAccount -ResourceGroupName $resourceGroupName `
    -LocationObject $locations -Name $accountName -ApiKind $apiKind -Tag $tags `
    -DefaultConsistencyLevel $consistencyLevel `
    -EnableAutomaticFailover:$true

Write-Host "Creating database $databaseName"
$database = New-AzCosmosDBGremlinDatabase -ParentObject $account `
    -Name $databaseName

# Prepare conflict resolution policy object for graph
$conflictResolutionPolicy = New-AzCosmosDBGremlinConflictResolutionPolicy `
    -Type LastWriterWins -Path $conflictResolutionPath

Write-Host "Creating graph $graphName"
$graph = New-AzCosmosDBGremlinGraph -ParentObject $database `
    -Name $graphName -Throughput $graphRUs `
    -PartitionKeyKind Hash -PartitionKeyPath $partitionKeys `
    -ConflictResolutionPolicy $conflictResolutionPolicy

Clean up deployment

After the script sample has been run, the following command can be used to remove the resource group and all resources associated with it.

Remove-AzResourceGroup -ResourceGroupName "myResourceGroup"

Script explanation

This script uses the following commands. Each command in the table links to command specific documentation.

Command	Notes
Azure Cosmos DB
New-AzCosmosDBAccount	Creates an Azure Cosmos DB Account.
New-AzCosmosDBGremlinDatabase	Creates a API for Gremlin Database.
New-AzCosmosDBGremlinConflictResolutionPolicy	Creates a API for Gremlin Write Conflict Resolution Policy.
New-AzCosmosDBGremlinGraph	Creates a API for Gremlin Graph.
Azure Resource Groups
Remove-AzResourceGroup	Deletes a resource group including all nested resources.

Next steps

For more information on the Azure PowerShell, see Azure PowerShell documentation.