Make VPC egress settings parameterizeable

CHANGELOG.md

@@ -2,3 +2,4 @@
 - Fix demo projects + web frameworks with emulators (#6737)
 - Fix Next.js static routes with server actions (#6664)
 - Fixed an issue where `GOOGLE_CLOUD_QUOTA_PROJECT` was not correctly respected. (#6801)
+- Make VPC egress settings in functions parameterizeable (#6843)

src/deploy/functions/backend.ts

@@ -177,6 +177,13 @@ export function isValidMemoryOption(mem: unknown): mem is MemoryOptions {
   return allMemoryOptions.includes(mem as MemoryOptions);
 }
 
+/**
+ * Is a given string a valid VpcEgressSettings?
+ */
+export function isValidEgressSetting(egress: unknown): egress is VpcEgressSettings {
+  return egress === "PRIVATE_RANGES_ONLY" || egress === "ALL_TRAFFIC";
+}
+
 /** Returns a human-readable name with MB or GB suffix for a MemoryOption (MB). */
 export function memoryOptionDisplayName(option: MemoryOptions): string {
   return {

src/deploy/functions/build.ts

@@ -193,7 +193,7 @@ export function isBlockingTriggered(triggered: Triggered): triggered is Blocking
 
 export interface VpcSettings {
   connector: string | Expression<string>;
-  egressSettings?: "PRIVATE_RANGES_ONLY" | "ALL_TRAFFIC" | null;
+  egressSettings?: "PRIVATE_RANGES_ONLY" | "ALL_TRAFFIC" | Expression<string> | null;
 }
 
 export interface SecretEnvVar {
@@ -204,12 +204,6 @@ export interface SecretEnvVar {
 
 export type MemoryOption = 128 | 256 | 512 | 1024 | 2048 | 4096 | 8192 | 16384 | 32768;
 const allMemoryOptions: MemoryOption[] = [128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768];
-/**
- * Is a given number a valid MemoryOption?
- */
-export function isValidMemoryOption(mem: unknown): mem is MemoryOption {
-  return allMemoryOptions.includes(mem as MemoryOption);
-}
 
 export type FunctionsPlatform = backend.FunctionsPlatform;
 export const AllFunctionsPlatforms: FunctionsPlatform[] = ["gcfv1", "gcfv2"];
@@ -514,7 +508,16 @@ export function toBackend(
         }
 
         bkEndpoint.vpc = { connector: bdEndpoint.vpc.connector };
-        proto.copyIfPresent(bkEndpoint.vpc, bdEndpoint.vpc, "egressSettings");
+        if (bdEndpoint.vpc.egressSettings) {
+          const egressSettings = r.resolveString(bdEndpoint.vpc.egressSettings);
+          if (!backend.isValidEgressSetting(egressSettings)) {
+            throw new FirebaseError(
+              `Value "${egressSettings}" is an invalid ` +
+                "egress setting. Valid values are PRIVATE_RANGES_ONLY and ALL_TRAFFIC",
+            );
+          }
+          bkEndpoint.vpc.egressSettings = egressSettings;
+        }
       } else if (bdEndpoint.vpc === null) {
         bkEndpoint.vpc = null;
       }

src/deploy/functions/runtimes/discovery/v1alpha1.ts

@@ -1,4 +1,5 @@
 import * as build from "../../build";
+import * as backend from "../../backend";
 import * as params from "../../params";
 import * as runtimes from "..";
 
@@ -126,7 +127,7 @@ function assertBuildEndpoint(ep: WireEndpoint, id: string): void {
     platform: (platform) => build.AllFunctionsPlatforms.includes(platform),
     entryPoint: "string",
     omit: "Field<boolean>?",
-    availableMemoryMb: (mem) => mem === null || isCEL(mem) || build.isValidMemoryOption(mem),
+    availableMemoryMb: (mem) => mem === null || isCEL(mem) || backend.isValidMemoryOption(mem),
     maxInstances: "Field<number>?",
     minInstances: "Field<number>?",
     concurrency: "Field<number>?",

src/test/deploy/functions/build.spec.ts

@@ -1,6 +1,7 @@
 import { expect } from "chai";
 import * as build from "../../../deploy/functions/build";
 import { ParamValue } from "../../../deploy/functions/params";
+import { FirebaseError } from "../../../error";
 
 describe("toBackend", () => {
   it("populates backend info from Build", () => {
@@ -124,8 +125,8 @@ describe("toBackend", () => {
         minInstances: "{{ params.mininstances }}",
         serviceAccount: "{{ params.serviceaccount }}",
         vpc: {
-          connector: "projects/project/locations/region/connectors/connector",
-          egressSettings: "PRIVATE_RANGES_ONLY",
+          connector: "{{ params.connector }}",
+          egressSettings: "{{ params.egressSettings }}",
         },
         ingressSettings: "ALLOW_ALL",
         labels: {
@@ -140,6 +141,8 @@ describe("toBackend", () => {
       maxinstances: new ParamValue("42", false, { number: true }),
       mininstances: new ParamValue("1", false, { number: true }),
       serviceaccount: new ParamValue("service-account-1@", false, { string: true }),
+      connector: new ParamValue("connector", false, { string: true }),
+      egressSettings: new ParamValue("ALL_TRAFFIC", false, { string: true }),
     });
     expect(Object.keys(backend.endpoints).length).to.equal(1);
     const endpointDef = Object.values(backend.endpoints)[0];
@@ -154,6 +157,32 @@ describe("toBackend", () => {
       expect(
         "httpsTrigger" in endpointDef.func ? endpointDef.func.httpsTrigger.invoker : [],
       ).to.have.members(["service-account-2@", "service-account-3@"]);
+      expect(endpointDef.func.vpc?.connector).to.equal(
+        "projects/project/locations/us-central1/connectors/connector",
+      );
+      expect(endpointDef.func.vpc?.egressSettings).to.equal("ALL_TRAFFIC");
     }
   });
+
+  it("enforces enum correctness for VPC egress settings", () => {
+    const desiredBuild: build.Build = build.of({
+      func: {
+        platform: "gcfv2",
+        region: ["us-central1"],
+        project: "project",
+        runtime: "nodejs16",
+        entryPoint: "func",
+        vpc: {
+          connector: "connector",
+          egressSettings: "{{ params.egressSettings }}",
+        },
+        httpsTrigger: {},
+      },
+    });
+    expect(() => {
+      build.toBackend(desiredBuild, {
+        egressSettings: new ParamValue("INVALID", false, { string: true }),
+      });
+    }).to.throw(FirebaseError, /Value "INVALID" is an invalid egress setting./);
+  });
 });