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fix: resolve 'Failed to parse URL from /me' error in container dry-run deployments
Modified buildAndMaybePush to skip account loading and disk limit validation in dry-run mode, maintaining the property that dry-run mode doesn't require API access while still allowing container building to proceed.
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lines changed

‎.changeset/container-dry-run-fix.md‎

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@@ -0,0 +1,7 @@
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---
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"wrangler": patch
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---
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fix: resolve "Failed to parse URL from /me" error in container dry-run deployments
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Fixed an issue where `wrangler deploy --dry-run` with containers using local Dockerfiles would fail with "Failed to parse URL from /me" error. The fix modifies the `buildAndMaybePush` function to skip account loading and disk limit validation in dry-run mode, maintaining the property that dry-run mode doesn't require API access while still allowing container building to proceed.

‎packages/wrangler/src/__tests__/deploy.test.ts‎

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@@ -9270,6 +9270,75 @@ addEventListener('fetch', event => {});`
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);
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});
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it("should not fail with URL parsing error when using containers in dry-run mode", async () => {
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writeWranglerConfig({
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main: "./index.js",
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durable_objects: {
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bindings: [{ name: "DO", class_name: "ExampleDurableObject" }],
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},
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containers: [
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{
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name: "test-container",
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class_name: "ExampleDurableObject",
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image: "./Dockerfile",
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},
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],
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});
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fs.writeFileSync(
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"index.js",
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`export class ExampleDurableObject {}; export default{};`
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);
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fs.writeFileSync(
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"./Dockerfile",
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"FROM node:18\nCOPY . .\nCMD ['node', 'index.js']"
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);
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// Mock buildAndMaybePush to verify it's called with dryRun=true
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const buildAndMaybePushSpy = vi.spyOn(
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await import("../cloudchamber/build"),
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"buildAndMaybePush"
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);
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buildAndMaybePushSpy.mockImplementation(async () => ({
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image: "test-image:latest",
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pushed: false,
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}));
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// Mock other dependencies
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vi.doMock("../cloudchamber/common", () => ({
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fillOpenAPIConfiguration: vi.fn(),
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}));
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vi.doMock("../versions/api", () => ({
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fetchVersion: vi.fn().mockResolvedValue({
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resources: {
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bindings: [
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{
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type: "durable_object_namespace",
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class_name: "ExampleDurableObject",
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namespace_id: "test-namespace-id",
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},
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],
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},
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}),
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}));
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await runWrangler("deploy --dry-run");
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// Verify buildAndMaybePush was called with dryRun=true
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expect(buildAndMaybePushSpy).toHaveBeenCalledWith(
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expect.objectContaining({
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tag: expect.stringContaining("test-container:"),
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}),
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expect.any(String), // pathToDocker
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false, // push = false in dry-run
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expect.objectContaining({
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name: "test-container",
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class_name: "ExampleDurableObject",
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image: "./Dockerfile",
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}),
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true // dryRun = true
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);
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});
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it("should support durable objects and D1", async () => {
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writeWranglerConfig({
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main: "index.js",

‎packages/wrangler/src/cloudchamber/build.ts‎

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Original file line numberDiff line numberDiff line change
@@ -77,13 +77,26 @@ export async function buildAndMaybePush(
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args: BuildArgs,
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pathToDocker: string,
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push: boolean,
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containerConfig?: ContainerApp
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containerConfig?: ContainerApp,
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dryRun = false
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): Promise<{ image: string; pushed: boolean }> {
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try {
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// account is also used to check limits below, so it is better to just pull the entire
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// account information here
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const account = await loadAccount();
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const cloudflareAccountID = account.external_account_id;
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// In dry-run mode, we skip account loading and disk limit validation
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// since we're not actually deploying
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let account: CompleteAccountCustomer | undefined;
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let cloudflareAccountID: string;
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if (!dryRun) {
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// account is also used to check limits below, so it is better to just pull the entire
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// account information here
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account = await loadAccount();
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cloudflareAccountID = account.external_account_id;
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} else {
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// In dry-run mode, we use a placeholder account ID for the image tag
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// The actual account ID won't matter since we're not pushing
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cloudflareAccountID = "dry-run-account-id";
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}
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const imageTag = getCloudflareRegistryWithAccountNamespace(
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cloudflareAccountID,
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args.tag
@@ -105,27 +118,31 @@ export async function buildAndMaybePush(
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dockerfile,
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});
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// ensure the account is not allowed to build anything that exceeds the current
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// account's disk size limits
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const inspectOutput = await dockerImageInspect(pathToDocker, {
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imageTag,
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formatString:
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"{{ .Size }} {{ len .RootFS.Layers }} {{json .RepoDigests}}",
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});
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// Only check disk limits when not in dry-run mode
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if (!dryRun && account) {
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// ensure the account is not allowed to build anything that exceeds the current
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// account's disk size limits
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const inspectOutput = await dockerImageInspect(pathToDocker, {
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imageTag,
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formatString:
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"{{ .Size }} {{ len .RootFS.Layers }} {{json .RepoDigests}}",
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});
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const [sizeStr, layerStr, repoDigests] = inspectOutput.split(" ");
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const size = parseInt(sizeStr, 10);
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const layers = parseInt(layerStr, 10);
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const [sizeStr, layerStr, repoDigests] = inspectOutput.split(" ");
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const size = parseInt(sizeStr, 10);
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const layers = parseInt(layerStr, 10);
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// 16MiB is the layer size adjustments we use in devmapper
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const MiB = 1024 * 1024;
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const requiredSize = Math.ceil(size * 1.1 + layers * 16 * MiB);
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// TODO: do more config merging and earlier
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await ensureDiskLimits({
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requiredSize,
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account: account,
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containerApp: containerConfig,
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});
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}
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// 16MiB is the layer size adjustments we use in devmapper
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const MiB = 1024 * 1024;
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const requiredSize = Math.ceil(size * 1.1 + layers * 16 * MiB);
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// TODO: do more config merging and earlier
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await ensureDiskLimits({
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requiredSize,
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account: account,
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containerApp: containerConfig,
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});
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let pushed = false;
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if (push) {
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await dockerLoginManagedRegistry(pathToDocker);
@@ -140,6 +157,12 @@ export async function buildAndMaybePush(
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// pulled every time. This guarantees consistency across different environments
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// and deployments.
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// From: https://docs.docker.com/dhi/core-concepts/digests/
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const inspectOutput = await dockerImageInspect(pathToDocker, {
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imageTag,
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formatString:
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"{{ .Size }} {{ len .RootFS.Layers }} {{json .RepoDigests}}",
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});
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const [, , repoDigests] = inspectOutput.split(" ");
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const parsedDigests = JSON.parse(repoDigests);
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if (!Array.isArray(parsedDigests)) {
@@ -220,7 +243,8 @@ export async function buildCommand(
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},
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getDockerPath() ?? args.pathToDocker,
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args.push,
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container
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container,
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false // not a dry-run for regular build command
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);
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}
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}

‎packages/wrangler/src/cloudchamber/deploy.ts‎

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@@ -44,7 +44,8 @@ export async function maybeBuildContainer(
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options,
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pathToDocker,
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!dryRun,
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containerConfig
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containerConfig,
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dryRun
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);
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return buildResult;
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}

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