fix: Append 6-char resource group hash to storage account name (#256)

Because storage account names are global, the need to be unique across resource groups. This adds the first 6 characters of the `md5` resource group hash to the end of the storage account name.

Resolves AB#846

package.json

@@ -51,6 +51,7 @@
     "js-yaml": "^3.13.1",
     "jsonpath": "^1.0.1",
     "lodash": "^4.16.6",
+    "md5": "^2.2.1",
     "open": "^6.3.0",
     "request": "^2.81.0",
     "rimraf": "^2.6.3",

src/armTemplates/resources/storageAccount.test.ts

@@ -1,8 +1,12 @@
 import { ServerlessAzureConfig } from "../../models/serverless";
 import { AzureNamingService } from "../../services/namingService";
 import { StorageAccountResource } from "./storageAccount";
+import md5 from "md5";
 
 describe("Storage Account Resource", () => {
+  const resourceGroup = "myResourceGroup";
+  const resourceGroupHash = md5(resourceGroup).substr(0, 6);
+
   const config: ServerlessAzureConfig = {
     functions: [],
     plugins: [],
@@ -11,19 +15,24 @@ describe("Storage Account Resource", () => {
       name: "azure",
       region: "westus",
       stage: "dev",
+      resourceGroup
     },
     service: "test-api"
   }
 
   it("Generates safe storage account name with short parts", () => {
     const testConfig: ServerlessAzureConfig = {
       ...config,
+      provider: {
+        ...config.provider,
+        resourceGroup
+      },
       service: "test-api",
     };
 
     const result = StorageAccountResource.getResourceName(testConfig);
     assertValidStorageAccountName(testConfig, result);
-    expect(result.startsWith("slswusdev")).toBe(true);
+    expect(result).toEqual(`slswusdev${resourceGroupHash}`);
   });
 
   it("Generates safe storage account names with long parts", () => {
@@ -33,13 +42,14 @@ describe("Storage Account Resource", () => {
         ...config.provider,
         prefix: "my-long-test-prefix-name",
         region: "Australia Southeast",
-        stage: "development"
+        stage: "development",
+        resourceGroup
       }
     };
 
     const result = StorageAccountResource.getResourceName(testConfig);
     assertValidStorageAccountName(testConfig, result);
-    expect(result.startsWith("mylaussedev")).toBe(true);
+    expect(result).toEqual(`mylaussedev${resourceGroupHash}`)
   });
 
   it("Generating a storage account name is idempotent", () => {

src/armTemplates/resources/storageAccount.ts

@@ -5,7 +5,13 @@ import configConstants from "../../config";
 
 export class StorageAccountResource implements ArmResourceTemplateGenerator {
   public static getResourceName(config: ServerlessAzureConfig) {
-    return AzureNamingService.getSafeResourceName(config, configConstants.naming.maxLength.storageAccount, config.provider.storageAccount);
+    return AzureNamingService.getSafeResourceName(
+      config,
+      configConstants.naming.maxLength.storageAccount,
+      config.provider.storageAccount,
+      "",
+      true
+    );
   }
 
   public getTemplate(): ArmResourceTemplate {

src/config.ts

@@ -32,7 +32,8 @@ export const configConstants = {
   scmCommandApiPath: "/api/command",
   scmDomain: ".scm.azurewebsites.net",
   scmVfsPath: "/api/vfs/site/wwwroot/",
-  scmZipDeployApiPath: "/api/zipdeploy"
+  scmZipDeployApiPath: "/api/zipdeploy",
+  resourceGroupHashLength: 6,
 };
 
 export default configConstants;

src/services/baseService.ts

@@ -42,6 +42,7 @@ export abstract class BaseService {
     this.credentials = serverless.variables["azureCredentials"];
     this.subscriptionId = serverless.variables["subscriptionId"];
     this.resourceGroup = this.getResourceGroupName();
+    this.config.provider.resourceGroup = this.resourceGroup;
     this.deploymentConfig = this.getDeploymentConfig();
     this.deploymentName = this.getDeploymentName();
     this.artifactName = this.getArtifactName(this.deploymentName);

src/services/namingService.test.ts

@@ -2,6 +2,9 @@ import { AzureNamingService } from "./namingService"
 import { ServerlessAzureConfig } from "../models/serverless";
 
 describe("Naming Service", () => {
+
+  const resourceGroup = "myResourceGroup";
+
   it("Creates a short name for an azure region", () => {
     const expected = "ausse";
     const actual = AzureNamingService.createShortAzureRegionName("australiasoutheast");
@@ -96,6 +99,7 @@ describe("Naming Service", () => {
         name: "azure",
         region: "westus",
         stage: "dev",
+        resourceGroup,
       },
       service: "test-api"
     };
@@ -116,6 +120,7 @@ describe("Naming Service", () => {
         name: "azure",
         region: "westus",
         stage: "multicloud",
+        resourceGroup,
       },
       service: "extra-long-service-name"
     };

src/services/namingService.ts

@@ -1,6 +1,7 @@
 import { ServerlessAzureConfig, ResourceConfig } from "../models/serverless"
 import { Guard } from "../shared/guard"
 import configConstants from "../config";
+import md5 from "md5";
 
 export class AzureNamingService {
 
@@ -45,25 +46,28 @@ export class AzureNamingService {
    * @param forbidden Regex for characters to remove from name. Defaults to non-alpha-numerics
    * @param replaceWith String to replace forbidden characters. Defaults to empty string
    */
-  public static getSafeResourceName(config: ServerlessAzureConfig, maxLength: number, resourceConfig?: ResourceConfig, suffix: string = "", forbidden: RegExp = /\W+/g, replaceWith: string = "") {
+  public static getSafeResourceName(config: ServerlessAzureConfig, maxLength: number, resourceConfig?: ResourceConfig, suffix: string = "", includeHash = false) {
+    const nonAlphaNumeric = /\W+/g;
+
     if (resourceConfig && resourceConfig.name) {
       const { name } = resourceConfig;
 
       if (name.length > maxLength) {
         throw new Error(`Name '${name}' invalid. Should be shorter than ${maxLength} characters`);
       }
 
-      return name.replace(forbidden, replaceWith);
+      return name.replace(nonAlphaNumeric, "");
     }
 
     const { prefix, region, stage } = config.provider;
 
-    let safePrefix = prefix.replace(forbidden, replaceWith);
+    let safePrefix = prefix.replace(nonAlphaNumeric, "");
     const safeRegion = this.createShortAzureRegionName(region);
     let safeStage = this.createShortStageName(stage);
-    let safeSuffix = suffix.replace(forbidden, replaceWith);
+    let safeSuffix = suffix.replace(nonAlphaNumeric, "");
 
-    const remaining = maxLength - (safePrefix.length + safeRegion.length + safeStage.length + safeSuffix.length);
+    const hashLength = (includeHash) ? configConstants.resourceGroupHashLength : 0;
+    const remaining = maxLength - (safePrefix.length + safeRegion.length + safeStage.length + safeSuffix.length + hashLength);
 
     // Dynamically adjust the substring based on space needed
     if (remaining < 0) {
@@ -77,9 +81,17 @@ export class AzureNamingService {
       safeSuffix = safeSuffix.substr(0, partLength);
     }
 
-    return [safePrefix, safeRegion, safeStage, safeSuffix]
+    const safeHash = md5(config.provider.resourceGroup).substr(0, hashLength);
+
+    const name = [safePrefix, safeRegion, safeStage, safeHash, safeSuffix]
       .join("")
       .toLowerCase();
+
+    if (name.length > maxLength) {
+      throw new Error(`Name ${name} is too long. Should be shorter than ${maxLength} characters`)
+    }
+
+    return name;
   }
 
   /**