Docker 文件不复制沙箱中的环境变量

Question

我们正在服务器上切换到 Docker 容器，以便我们可以轻松地扩展和缩小服务器实例。

我们能够在产品上运行实例，一切都很好，但是存在外部问题阻止该切换。然而，在我们的功能分支上，构建全部失败。

# syntax=docker/dockerfile:1
# Client web

ARG NODE_VERSION=18.20.1
ARG PNPM_VERSION=8.6.10

################################################################################
# Use node image for base image for all stages.
FROM node:${NODE_VERSION}-alpine as base

# Set working directory for all build stages.
WORKDIR /usr/src/app

# Install pnpm.
RUN npm install -g pnpm@${PNPM_VERSION}

################################################################################
# Create a stage for installing production dependencies.
FROM base as deps

# Copy package manager configuration and lock files first to leverage Docker caching
COPY .npmrc .npmrc
COPY package.json pnpm-lock.yaml ./

# Install dependencies
RUN pnpm install --prod --frozen-lockfile

# Remove .npmrc after installation to secure
RUN rm -f .npmrc

################################################################################
# Create a stage for building the application.
FROM deps as build

# Copy package manager configuration and lock files first to leverage Docker caching
COPY package.json pnpm-lock.yaml ./

# Install development dependencies
# RUN pnpm install --frozen-lockfile

# Copy the rest of the source files into the image.
COPY . .
# Run the build script.
RUN pnpm run build

################################################################################
# Create a new stage to run the application with minimal runtime dependencies
# where the necessary files are copied from the build stage.
FROM base as final

# Set environment variables.
ARG NODE_ENV=production
ARG ENV=production
ARG PORT=8020
ARG CLIENT=client1
ARG API_ENV=prod
ARG CURRENT_RELEASE_TAG=fallback-tag

# Use production node environment by default.
ENV NODE_ENV=${NODE_ENV} \
    ENV=${ENV} \
    PORT=${PORT} \
    FEED_SOURCE=https://${CLIENT}-api-${API_ENV}.example.co.uk \
    CURRENT_RELEASE_TAG=${CURRENT_RELEASE_TAG}

# Run the application as a non-root user.
USER node

# Copy package.json so that package manager commands can be used.
COPY package.json .

# Copy the environment file.
RUN ls -la
COPY .env .env

# Copy the production dependencies from the deps stage and also
# the built application from the build stage into the image
COPY --from=deps --chown=node:node /usr/src/app/node_modules ./node_modules
COPY --from=build --chown=node:node /usr/src/app/ ./

# Expose the port that the application listens on.
EXPOSE 8020

# Run the application.
CMD pnpm start

这是我们在 Jenkins 上遇到的错误：

#12 [final 3/5] COPY .env .env
#12 ERROR: failed to calculate checksum of ref b8dc9192-ad6a-45e2-b47b-b9c0625a2478::tnrbpv5dx0dd8lja68zz6akz2: "/.env": not found
------
 > [final 3/5] COPY .env .env:
------
dockerfile:74
--------------------
  72 |     # Copy the environment file.
  73 |     RUN ls -la
  74 | >>> COPY .env .env
  75 |     
  76 |     # Copy the production dependencies from the deps stage and also
--------------------
ERROR: failed to solve: failed to compute cache key: failed to calculate checksum of ref b8dc9192-ad6a-45e2-b47b-b9c0625a2478::tnrbpv5dx0dd8lja68zz6akz2: "/.env": not found

我们尝试了以下命令：

COPY .env[t] .env

印象中它会读取 .env.defaults 或 .env.preview 文件，但事实并非如此。

.env 不在 dockerignore 中

我们最初假设

copy . .

也会负责复制 .env 文件。 需要做什么才能在我们的功能分支上 dockerfile 读取 .env.defaults？

Answer 1

通过从 docker 端删除 .env 的副本并通过 Jenkins 设置文件设置相关的 .env 变量解决了这个问题。