5 replies

Monorepo on Cloudflare Workers: Unable to pass down Environment Variables

Hey guys, new to Cloudflare Workers, Wrangler, and D1.

Trying to scaffold out to use Cloudflare Workers in a monorepo structure, and get it deployed:

Monorepo Structure:

- apps/
- - web/
- - server/
- packages
- - db/
- - auth/
- - .../

- apps/
- - web/
- - server/
- packages
- - db/
- - auth/
- - .../

I'm using Vite (React), Drizzle, Better-Auth, and Hono.

apps/server/wrangler.toml

apps/server/wrangler.toml

name = "..."
main = "src/index.ts"
compatibility_date = "2025-04-03"
compatibility_flags = ["nodejs_compat"]

[[d1_databases]]
binding = "DATABASE_URL"
database_id = "4a72636b-dcca-4307-9530-eadca0029da4"
migrations_dir = "../../packages/db/src/migrations"
database_name = "db-name"

[vars]
CORS_ORIGIN = "..."

[vars.prod]
CORS_ORIGIN = "..."

name = "..."
main = "src/index.ts"
compatibility_date = "2025-04-03"
compatibility_flags = ["nodejs_compat"]

[[d1_databases]]
binding = "DATABASE_URL"
database_id = "4a72636b-dcca-4307-9530-eadca0029da4"
migrations_dir = "../../packages/db/src/migrations"
database_name = "db-name"

[vars]
CORS_ORIGIN = "..."

[vars.prod]
CORS_ORIGIN = "..."

apps/web/wrangler.toml

apps/web/wrangler.toml

name = "..."
compatibility_date = "2025-04-03"

[assets]
not_found_handling = "single-page-application"

[vars]
VITE_SERVER_URL = "http://localhost:3000"

[vars.prod]
VITE_SERVER_URL = "..."

name = "..."
compatibility_date = "2025-04-03"

[assets]
not_found_handling = "single-page-application"

[vars]
VITE_SERVER_URL = "http://localhost:3000"

[vars.prod]
VITE_SERVER_URL = "..."

I had a few questions:

- How does my

web/

web/

monorepo get access to the workers environment variables?
When I check the settings under Environment Variables, it says that static assets do not have access to environment variables.
- How does my

db/

db/

package (which is Drizzle), gain access to the D1 instance? This is mainly for running the cli, i.e. migration, pushing.

Monorepo on Cloudflare Workers: Unable to pass down Environment Variables

Hey guys, new to Cloudflare Workers, Wrangler, and D1.

Trying to scaffold out to use Cloudflare Workers in a monorepo structure, and get it deployed:

Monorepo Structure:

- apps/
- - web/
- - server/
- packages
- - db/
- - auth/
- - .../

- apps/
- - web/
- - server/
- packages
- - db/
- - auth/
- - .../

I'm using Vite (React), Drizzle, Better-Auth, and Hono.

apps/server/wrangler.toml

apps/server/wrangler.toml

name = "..."
main = "src/index.ts"
compatibility_date = "2025-04-03"
compatibility_flags = ["nodejs_compat"]

[[d1_databases]]
binding = "DATABASE_URL"
database_id = "4a72636b-dcca-4307-9530-eadca0029da4"
migrations_dir = "../../packages/db/src/migrations"
database_name = "db-name"

[vars]
CORS_ORIGIN = "..."

[vars.prod]
CORS_ORIGIN = "..."

name = "..."
main = "src/index.ts"
compatibility_date = "2025-04-03"
compatibility_flags = ["nodejs_compat"]

[[d1_databases]]
binding = "DATABASE_URL"
database_id = "4a72636b-dcca-4307-9530-eadca0029da4"
migrations_dir = "../../packages/db/src/migrations"
database_name = "db-name"

[vars]
CORS_ORIGIN = "..."

[vars.prod]
CORS_ORIGIN = "..."

apps/web/wrangler.toml

apps/web/wrangler.toml

name = "..."
compatibility_date = "2025-04-03"

[assets]
not_found_handling = "single-page-application"

[vars]
VITE_SERVER_URL = "http://localhost:3000"

[vars.prod]
VITE_SERVER_URL = "..."

name = "..."
compatibility_date = "2025-04-03"

[assets]
not_found_handling = "single-page-application"

[vars]
VITE_SERVER_URL = "http://localhost:3000"

[vars.prod]
VITE_SERVER_URL = "..."

I had a few questions:

- How does my

web/

web/

monorepo get access to the workers environment variables?
When I check the settings under Environment Variables, it says that static assets do not have access to environment variables.
- How does my

db/

db/

package (which is Drizzle), gain access to the D1 instance? This is mainly for running the cli, i.e. migration, pushing.

Monorepo on Cloudflare Workers: Unable to pass down Environment Variables

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