Railway•6mo ago

Docker build cache issue

https://docs.railway.app/guides/dockerfiles Railway supports cache mounts in your Dockerfile in the following format: --mount=type=cache,id=s/<service id>-<target path>,target=<target path> Replace <service id> with the id of the service.

FROM node:16 as builder

WORKDIR /build

COPY web/package.json .

ARG RAILWAY_SERVICE_ID

RUN --mount=type=cache,id=s/${RAILWAY_SERVICE_ID}-node_modules,target=node_modules
RUN npm install

FROM node:16 as builder

WORKDIR /build

COPY web/package.json .

ARG RAILWAY_SERVICE_ID

RUN --mount=type=cache,id=s/${RAILWAY_SERVICE_ID}-node_modules,target=node_modules
RUN npm install

build logs

 

[Region: us-west1]

Cache mount ID is not prefixed with cache key

 

[Region: us-west1]

Cache mount ID is not prefixed with cache key

why RAILWAY_SERVICE_ID can not be retrieved in build time?

Railway Docs

Build from a Dockerfile | Railway Docs

Documentation for Railway

5 Replies

Percy•6mo ago

Project ID: b2612e07-ca79-4076-a659-4eed5a972428

waltcowOP•6mo ago

b2612e07-ca79-4076-a659-4eed5a972428

Brody•6mo ago

that is not supported syntax, you need to hardcode the service id

waltcowOP•6mo ago

I think the docs need to clarify this details

Brody•6mo ago

Replace <service id> with the id of the service.

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Docker build cache issue