To encrypt Azure Container Registry using Customer Managed Keys using key vault, we would need azure managed user identity to perform the encryption on acr.
Resources needed for this project:
- Azure Managed user identity
- Azure Key vault with Key
- Azure key vault access policy
- Azure Container Registry
Azure Managed User Identity
We need to create user identity first using following template
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"identity_name": {
"type": "string",
"defaultValue": "acridentity-03",
"metadata": {
"description": "USER ASSIGNED IDENTITY NAME"
}
}
},
"variables": {},
"resources": [
{
"type": "Microsoft.ManagedIdentity/userAssignedIdentities",
"name": "[parameters('identity_name')]",
"apiVersion": "2018-11-30",
"location": "[resourceGroup().location]"
}
]
}
Azure Key vault with Key
Second we need to create Key vault using this template
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"keyName": {
"type": "string",
"defaultValue": "klaacrkey-03"
},
"vault_name": {
"type": "string",
"defaultValue": "klaacrvault-03"
},
"keyVersion": {
"type": "string",
"defaultValue": ""
},
"location": {
"type": "string",
"defaultValue": "[resourceGroup().location]"
},
"attributes": {
"type": "object",
"defaultValue": {},
"metadata": {
"description": "The attributes of a key managed by the key vault service."
}
},
"crv": {
"type": "string",
"defaultValue": "",
"allowedValues": [
"",
"P-256",
"P-256K",
"P-384",
"P-521"
],
"metadata": {
"description": "Elliptic curve name."
}
},
"key_ops": {
"type": "array",
"defaultValue": [],
"metadata": {
"description": "JSON web key operations. Operations include: 'encrypt', 'decrypt', 'sign', 'verify', 'wrapKey', 'unwrapKey'"
}
},
"key_size": {
"type": "int",
"defaultValue": 4096,
"metadata": {
"description": "The key size in bits. For example: 2048, 3072, or 4096 for RSA."
}
},
"kty": {
"type": "string",
"defaultValue": "RSA",
"allowedValues": [
"EC",
"EC-HSM",
"RSA",
"RSA-HSM"
],
"metadata": {
"description": "The type of key to create"
}
},
"tags": {
"type": "object",
"defaultValue": {},
"metadata": {
"description": "Tags to be assigned to the Key."
}
}
},
"variables": {},
"resources": [
{
"type": "Microsoft.KeyVault/vaults",
"name": "[parameters('vault_name')]",
"apiVersion": "2016-10-01",
"location": "[parameters('location')]",
"properties": {
"sku": {
"family": "A",
"name": "standard"
},
"tenantId": "[subscription().tenantid]",
"accessPolicies": [],
"enabledForDeployment":false,
"enabledForDiskEncryption":false,
"enabledForTemplateDeployment":true,
"enableSoftDelete":true,
"enablePurgeProtection": true
},
"dependsOn": [
"[resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', parameters('identity_name'))]"
]
},
{
"type": "Microsoft.KeyVault/vaults/keys",
"apiVersion": "2019-09-01",
"name": "[concat(parameters('vault_name'), '/', parameters('keyName'))]",
"properties": {
"attributes": "[parameters('attributes')]",
"crv": "[parameters('crv')]",
"kty": "[parameters('kty')]",
"key_ops": "[parameters('key_ops')]",
"key_size": "[parameters('key_size')]"
},
"dependsOn": [
"[resourceId('Microsoft.KeyVault/vaults/', parameters('vault_name'))]"
]
}
]
}
Azure KeyVault Access Policy
Now we need to add Azure managed user identity to key vault access policy and grant permission to have read/write access to key vault key. for this we would need to use nested arm template.
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"identity_name": {
"type": "string",
"defaultValue": "acridentity-03",
"metadata": {
"description": "USER ASSIGNED IDENTITY NAME"
}
},
"keyName": {
"type": "string",
"defaultValue": "klaacrkey-03"
},
"vault_name": {
"type": "string",
"defaultValue": "klaacrvault-03"
},
"keyVersion": {
"type": "string",
"defaultValue": ""
},
"location": {
"type": "string",
"defaultValue": "[resourceGroup().location]"
},
"attributes": {
"type": "object",
"defaultValue": {},
"metadata": {
"description": "The attributes of a key managed by the key vault service."
}
},
"crv": {
"type": "string",
"defaultValue": "",
"allowedValues": [
"",
"P-256",
"P-256K",
"P-384",
"P-521"
],
"metadata": {
"description": "Elliptic curve name."
}
},
"key_ops": {
"type": "array",
"defaultValue": [],
"metadata": {
"description": "JSON web key operations. Operations include: 'encrypt', 'decrypt', 'sign', 'verify', 'wrapKey', 'unwrapKey'"
}
},
"key_size": {
"type": "int",
"defaultValue": 4096,
"metadata": {
"description": "The key size in bits. For example: 2048, 3072, or 4096 for RSA."
}
},
"kty": {
"type": "string",
"defaultValue": "RSA",
"allowedValues": [
"EC",
"EC-HSM",
"RSA",
"RSA-HSM"
],
"metadata": {
"description": "The type of key to create"
}
},
"tags": {
"type": "object",
"defaultValue": {},
"metadata": {
"description": "Tags to be assigned to the Key."
}
}
},
"variables": {},
"resources": [
{
"type": "Microsoft.ManagedIdentity/userAssignedIdentities",
"name": "[parameters('identity_name')]",
"apiVersion": "2018-11-30",
"location": "[resourceGroup().location]"
},
{
"type": "Microsoft.KeyVault/vaults",
"name": "[parameters('vault_name')]",
"apiVersion": "2016-10-01",
"location": "[parameters('location')]",
"properties": {
"sku": {
"family": "A",
"name": "standard"
},
"tenantId": "[subscription().tenantid]",
"accessPolicies": [],
"enabledForDeployment":false,
"enabledForDiskEncryption":false,
"enabledForTemplateDeployment":true,
"enableSoftDelete":true,
"enablePurgeProtection": true
},
"dependsOn": [
"[resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', parameters('identity_name'))]"
]
},
{
"type": "Microsoft.KeyVault/vaults/keys",
"apiVersion": "2019-09-01",
"name": "[concat(parameters('vault_name'), '/', parameters('keyName'))]",
"properties": {
"attributes": "[parameters('attributes')]",
"crv": "[parameters('crv')]",
"kty": "[parameters('kty')]",
"key_ops": "[parameters('key_ops')]",
"key_size": "[parameters('key_size')]"
},
"dependsOn": [
"[resourceId('Microsoft.KeyVault/vaults/', parameters('vault_name'))]"
]
},
{
"type": "Microsoft.Resources/deployments",
"apiVersion": "2019-07-01",
"name": "CreateRegistry",
"dependsOn": [
"[resourceId('Microsoft.KeyVault/vaults', parameters('vault_name'))]"
],
"properties": {
"mode": "Incremental",
"template": {
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "0.1.0.0",
"resources": [
{
"type": "Microsoft.ManagedIdentity/userAssignedIdentities",
"name": "[parameters('identity_name')]",
"apiVersion": "2018-11-30",
"location": "[resourceGroup().location]"
},
{
"type": "Microsoft.KeyVault/vaults",
"name": "[parameters('vault_name')]",
"apiVersion": "2016-10-01",
"location": "[parameters('location')]",
"properties": {
"sku": {
"family": "A",
"name": "standard"
},
"tenantId": "[subscription().tenantid]",
"accessPolicies": [],
"enabledForDeployment":false,
"enabledForDiskEncryption":false,
"enabledForTemplateDeployment":true,
"enableSoftDelete":true,
"enablePurgeProtection": true
},
"dependsOn": [
"[resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', parameters('identity_name'))]"
]
},
{
"type": "Microsoft.KeyVault/vaults/accessPolicies",
"name": "[concat(parameters('vault_name'), '/add')]",
"apiVersion": "2019-09-01",
"dependsOn": [
"[resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', parameters('identity_name'))]",
"[resourceId('Microsoft.KeyVault/vaults/', parameters('vault_name'))]"
],
"properties": {
"accessPolicies": [
{
"tenantId": "[subscription().tenantid]",
"objectId": "[reference(resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', parameters('identity_name')), '2018-11-30').principalId]",
"permissions": {
"keys": [
"get",
"list",
"update",
"create",
"import",
"delete",
"recover",
"backup",
"restore",
"decrypt",
"encrypt",
"unwrapKey",
"wrapKey",
"verify",
"sign",
"purge"
],
"secrets": [],
"certificates": []
}
}
]
}
}
]
}
}
}
]
}
Azure Container Registry
In order to create azure container registry and start encrypt it using user identity and key vault and key, we would need to use nested arm template deployment inside arm template. as we already used one nested template previously for key vault key access policy to add user managed identity, we will just another resource under nested template to create Container registry and encrypt it using key vault and user identity.
so the Full arm template will look like this including azure container registry.
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"identity_name": {
"type": "string",
"defaultValue": "acridentity-03",
"metadata": {
"description": "USER ASSIGNED IDENTITY NAME"
}
},
"registry_name": {
"type": "string",
"defaultValue": "klaregistry03",
"metadata": {
"description": "Globally unique name of your Azure Container Registry"
}
},
"acrAdminUserEnabled": {
"type": "bool",
"defaultValue": false,
"metadata": {
"description": "Enable admin user that has push / pull permission to the registry."
}
},
"acrSku": {
"type": "string",
"defaultValue": "Premium",
"allowedValues": [
"Premium"
],
"metadata": {
"description": "Tier of your Azure Container Registry. Geo-replication requires Premium SKU."
}
},
"keyName": {
"type": "string",
"defaultValue": "klaacrkey-03"
},
"vault_name": {
"type": "string",
"defaultValue": "klaacrvault-03"
},
"keyVersion": {
"type": "string",
"defaultValue": ""
},
"location": {
"type": "string",
"defaultValue": "[resourceGroup().location]"
},
"attributes": {
"type": "object",
"defaultValue": {},
"metadata": {
"description": "The attributes of a key managed by the key vault service."
}
},
"crv": {
"type": "string",
"defaultValue": "",
"allowedValues": [
"",
"P-256",
"P-256K",
"P-384",
"P-521"
],
"metadata": {
"description": "Elliptic curve name."
}
},
"key_ops": {
"type": "array",
"defaultValue": [],
"metadata": {
"description": "JSON web key operations. Operations include: 'encrypt', 'decrypt', 'sign', 'verify', 'wrapKey', 'unwrapKey'"
}
},
"key_size": {
"type": "int",
"defaultValue": 4096,
"metadata": {
"description": "The key size in bits. For example: 2048, 3072, or 4096 for RSA."
}
},
"kty": {
"type": "string",
"defaultValue": "RSA",
"allowedValues": [
"EC",
"EC-HSM",
"RSA",
"RSA-HSM"
],
"metadata": {
"description": "The type of key to create"
}
},
"tags": {
"type": "object",
"defaultValue": {},
"metadata": {
"description": "Tags to be assigned to the Key."
}
}
},
"variables": {},
"resources": [
{
"type": "Microsoft.ManagedIdentity/userAssignedIdentities",
"name": "[parameters('identity_name')]",
"apiVersion": "2018-11-30",
"location": "[resourceGroup().location]"
},
{
"type": "Microsoft.KeyVault/vaults",
"name": "[parameters('vault_name')]",
"apiVersion": "2016-10-01",
"location": "[parameters('location')]",
"properties": {
"sku": {
"family": "A",
"name": "standard"
},
"tenantId": "[subscription().tenantid]",
"accessPolicies": [],
"enabledForDeployment":false,
"enabledForDiskEncryption":false,
"enabledForTemplateDeployment":true,
"enableSoftDelete":true,
"enablePurgeProtection": true
},
"dependsOn": [
"[resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', parameters('identity_name'))]"
]
},
{
"type": "Microsoft.KeyVault/vaults/keys",
"apiVersion": "2019-09-01",
"name": "[concat(parameters('vault_name'), '/', parameters('keyName'))]",
"properties": {
"attributes": "[parameters('attributes')]",
"crv": "[parameters('crv')]",
"kty": "[parameters('kty')]",
"key_ops": "[parameters('key_ops')]",
"key_size": "[parameters('key_size')]"
},
"dependsOn": [
"[resourceId('Microsoft.KeyVault/vaults/', parameters('vault_name'))]"
]
},
{
"type": "Microsoft.Resources/deployments",
"apiVersion": "2019-07-01",
"name": "CreateRegistry",
"dependsOn": [
"[resourceId('Microsoft.KeyVault/vaults', parameters('vault_name'))]"
],
"properties": {
"mode": "Incremental",
"template": {
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "0.1.0.0",
"resources": [
{
"type": "Microsoft.ManagedIdentity/userAssignedIdentities",
"name": "[parameters('identity_name')]",
"apiVersion": "2018-11-30",
"location": "[resourceGroup().location]"
},
{
"type": "Microsoft.KeyVault/vaults",
"name": "[parameters('vault_name')]",
"apiVersion": "2016-10-01",
"location": "[parameters('location')]",
"properties": {
"sku": {
"family": "A",
"name": "standard"
},
"tenantId": "[subscription().tenantid]",
"accessPolicies": [],
"enabledForDeployment":false,
"enabledForDiskEncryption":false,
"enabledForTemplateDeployment":true,
"enableSoftDelete":true,
"enablePurgeProtection": true
},
"dependsOn": [
"[resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', parameters('identity_name'))]"
]
},
{
"type": "Microsoft.KeyVault/vaults/accessPolicies",
"name": "[concat(parameters('vault_name'), '/add')]",
"apiVersion": "2019-09-01",
"dependsOn": [
"[resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', parameters('identity_name'))]",
"[resourceId('Microsoft.KeyVault/vaults/', parameters('vault_name'))]"
],
"properties": {
"accessPolicies": [
{
"tenantId": "[subscription().tenantid]",
"objectId": "[reference(resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', parameters('identity_name')), '2018-11-30').principalId]",
"permissions": {
"keys": [
"get",
"list",
"update",
"create",
"import",
"delete",
"recover",
"backup",
"restore",
"decrypt",
"encrypt",
"unwrapKey",
"wrapKey",
"verify",
"sign",
"purge"
],
"secrets": [],
"certificates": []
}
}
]
}
},
{
"type": "Microsoft.ContainerRegistry/registries",
"apiVersion": "2019-12-01-preview",
"name": "[parameters('registry_name')]",
"location": "[resourceGroup().location]",
"sku": {
"name": "Premium",
"tier": "Premium"
},
"identity": {
"type": "UserAssigned",
"userAssignedIdentities": {
"[resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', parameters('identity_name'))]": {}
}
},
"properties": {
"adminUserEnabled": false,
"networkRuleSet": {
"defaultAction": "Allow",
"virtualNetworkRules": [],
"ipRules": []
},
"policies": {
"quarantinePolicy": {
"status": "disabled"
},
"trustPolicy": {
"type": "Notary",
"status": "disabled"
},
"retentionPolicy": {
"days": 7,
"status": "disabled"
}
},
"encryption": {
"status": "enabled",
"keyVaultProperties": {
"identity": "[reference(resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', parameters('identity_name')), '2018-11-30').clientId]",
"keyIdentifier": "[concat('https://', parameters('vault_name'),'.vault.azure.net/keys/', parameters('keyname'))]"
}
}
},
"dependsOn": [
"[resourceId('Microsoft.ManagedIdentity/userAssignedIdentities', parameters('identity_name'))]"
]
}
]
}
}
}
]
}
