Railway•10mo ago

Cache mounts MUST be in the format --mount=type=cache,id=<cache-id>

New to railway, trying to deploy a docker image which builds a Node app. The quickstart from github immediately detected the Dockerfile -- yet it seems to immediately fail with the full build log below:

[Region: us-west1]
Cache mounts MUST be in the format --mount=type=cache,id=<cache-id>

[Region: us-west1]
Cache mounts MUST be in the format --mount=type=cache,id=<cache-id>

My dockerfile does not contain mounts with type cache, it only uses mounts with secrets. Is this unsupported by railway?

FROM node:20

RUN apt-get update \
    && apt-get install -y dumb-init

EXPOSE 8081
WORKDIR /app

# Build backend
RUN --mount=type=secret,id=NPM_GITHUB_TOKEN \
  NPM_GITHUB_TOKEN=$(cat /run/secrets/NPM_GITHUB_TOKEN) \
  npm install
RUN --mount=type=secret,id=SHOPIFY_ACCESS_TOKEN \
  ABC_ACCESS_TOKEN=$(cat /run/secrets/ABC_ACCESS_TOKEN) \
  npm run build

# Build frontend
WORKDIR ./frontend
RUN --mount=type=secret,id=NPM_GITHUB_TOKEN \
  NPM_GITHUB_TOKEN=$(cat /run/secrets/NPM_GITHUB_TOKEN) \
  npm install
RUN npm run build

# Run
WORKDIR ..
ENTRYPOINT ["/usr/bin/dumb-init", "--"]
CMD ["npm", "run", "serve"]

FROM node:20

RUN apt-get update \
    && apt-get install -y dumb-init

EXPOSE 8081
WORKDIR /app

# Build backend
RUN --mount=type=secret,id=NPM_GITHUB_TOKEN \
  NPM_GITHUB_TOKEN=$(cat /run/secrets/NPM_GITHUB_TOKEN) \
  npm install
RUN --mount=type=secret,id=SHOPIFY_ACCESS_TOKEN \
  ABC_ACCESS_TOKEN=$(cat /run/secrets/ABC_ACCESS_TOKEN) \
  npm run build

# Build frontend
WORKDIR ./frontend
RUN --mount=type=secret,id=NPM_GITHUB_TOKEN \
  NPM_GITHUB_TOKEN=$(cat /run/secrets/NPM_GITHUB_TOKEN) \
  npm install
RUN npm run build

# Run
WORKDIR ..
ENTRYPOINT ["/usr/bin/dumb-init", "--"]
CMD ["npm", "run", "serve"]

14 Replies

Percy•10mo ago

Project ID: 1b92ecef-196c-4c1a-9ecf-09a0fd5d9a1b

FrankHeijdenOP•10mo ago

1b92ecef-196c-4c1a-9ecf-09a0fd5d9a1b https://www.answeroverflow.com/m/1163144590686175393 it seems this lad got recommended to use build args -- why no secrets?

ThallesComH•10mo ago

hi, im unfamiliar with --mount-type, why do you need it? can't you just use environment variables?

FrankHeijdenOP•10mo ago

build args persist in the final image https://docs.docker.com/build/building/secrets/ like these secrets would just be used for building the image I will probably as a workaround continue to build/publish to docker hub from github actions, then just use the image in railway directly brings me to my next roadblock, possibility of using a private docker hub image? Seems like there's no way to enter a token anywhere / link the account? https://discord.com/channels/713503345364697088/1180037087483920495/1180037087483920495 😢 and it seems for a ghcr.io private package no logs at all, just error after 7 mins which is weird since you connect your github to railway? so why can't it fetch the private packages

FrankHeijdenOP•10mo ago

ah okay railway doesnt include the packages scope...

Brody•10mo ago

railway does not support that kind of mount. all service variables are available as build args and then environment variables during runtime, there's no concept of separation. private images are not supported yet.

FrankHeijdenOP•10mo ago

okay, i dont want build secrets to be bundled/accessible from the docker image, so that leaves the last option, using private docker images. Is there an eta on this feature? Should be relatively simple to add right?

Brody•10mo ago

it's planned, but I have no ETA for you, sorry

FrankHeijdenOP•10mo ago

is this available in enterprise plans?

Brody•10mo ago

it's not implemented at all, but if someone on the enterprise plan where to request it, it would absolutely get it kickstarted

FrankHeijdenOP•10mo ago

I have contacted email support for this issue, I am currently on the pro plan and pretty much blocked by this

Brody•10mo ago

that would be the most appropriate channel for this request!

FrankHeijdenOP•10mo ago

Is email support really 2-3 business days? 😅

Brody•10mo ago

on the pro plan yes, on enterprise plans it's same day, or so I've heard https://docs.railway.app/reference/support#business-class-slos yes if I'm interpreting this correctly, it looks like it would be same business day for your current type of question

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Cache mounts MUST be in the format --mount=type=cache,id=<cache-id>