I am trying to use mount in the DockerFile But I am facing issue while building the image through GitHub Actions

adityal · April 14, 2023, 1:51pm

Please let me know how to use mount

Dockerfile

FROM node:16-bullseye-slim

# Install sqlite3 dependencies. You can skip this if you don't use sqlite3 in the image,
# in which case you should also move better-sqlite3 to "devDependencies" in package.json.

RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
    --mount=type=cache,target=/var/lib/apt,sharing=locked \
    apt-get update && \
    apt-get install -y --no-install-recommends libsqlite3-dev python3 build-essential && \
    yarn config set python /usr/bin/python3

# From here on we use the least-privileged `node` user to run the backend.
USER node

# This should create the app dir as `node`.
# If it is instead created as `root` then the `tar` command below will fail: `can't create directory 'packages/': Permission denied`.
# If this occurs, then ensure BuildKit is enabled (`DOCKER_BUILDKIT=1`) so the app dir is correctly created as `node`.
WORKDIR /app

# This switches many Node.js dependencies to production mode.
ENV NODE_ENV production

# Copy repo skeleton first, to avoid unnecessary docker cache invalidation.
# The skeleton contains the package.json of each package in the monorepo,
# and along with yarn.lock and the root package.json, that's enough to run yarn install.
COPY --chown=node:node yarn.lock package.json packages/backend/dist/skeleton.tar.gz ./
RUN tar xzf skeleton.tar.gz && rm skeleton.tar.gz

RUN --mount=type=cache,target=/home/node/.cache/yarn,sharing=locked,uid=1000,gid=1000 \
    yarn install --frozen-lockfile --production --network-timeout 300000

# Then copy the rest of the backend bundle, along with any other files we might want.
COPY --chown=node:node packages/backend/dist/bundle.tar.gz app-config*.yaml ./
RUN tar xzf bundle.tar.gz && rm bundle.tar.gz

CMD ["node", "packages/backend", "--config", "app-config.yaml"]

rimelek · April 16, 2023, 1:55pm

There error message shows exactly what you need to do. Since you shared a picture instead of sharing the error message, I can’t quote it for you that part.

You can also search for the mount flag and buildkit:

github.com

moby/buildkit/blob/master/frontend/dockerfile/docs/reference.md#run---mount

# Dockerfile reference

Docker can build images automatically by reading the instructions from a
`Dockerfile`. A `Dockerfile` is a text document that contains all the commands a
user could call on the command line to assemble an image. This page describes
the commands you can use in a `Dockerfile`.

## Format

Here is the format of the `Dockerfile`:

```dockerfile
# Comment
INSTRUCTION arguments
```

The instruction is not case-sensitive. However, convention is for them to
be UPPERCASE to distinguish them from arguments more easily.

Docker runs instructions in a `Dockerfile` in order. A `Dockerfile` **must

This file has been truncated. show original

It shows exactly what you need to add to he top of your Dockerfile to suppot mount

Added in docker/dockerfile:1.2

Example:

# syntax=docker/dockerfile:1.2
FROM ...

adityal · June 13, 2023, 8:43am

Thanks for the reply