docker-compose: failed to solve: rpc error: code = Unknown d

Question

当我运行我的dockerfile与docker build和docker run，它的工作很好。但是当我创建一个docker-compose.yml文件连接mongoDB时，我得到了一个错误。

ERROR:failed to solve: rpc error: code = Unknown desc = failed to compute cache key: failed to walk /var/lib/docker/tmp/buildkit-mount285447202/backend: lstat /var/lib/docker/tmp/buildkit-mount285447202/backend: no such file or directory.

下面是我的docker-compose代码:

version: "3"
services:   
backend: 
build: 
context: ./docker
dockerfile: Dockerfile.backend
container_name: backend
ports: 
- '8081:8081'
links:  
- mongodb
mongodb:
container_name: mongodb
image: mongo
ports:
- '27017:27017'

这是我的dockerfile代码:

FROM node:14-alpine AS builder
WORKDIR /app
COPY backend/package.json backend/package-lock.json ./
RUN npm install
COPY backend/src/ ./src
COPY backend/.env ./
COPY backend/.babelrc ./
RUN mkdir -p build/src
RUN npm run build
FROM node:alpine AS runner
WORKDIR /app
RUN apk add --no-cache 
chromium 
nss 
freetype 
harfbuzz 
ca-certificates 
ttf-freefont
ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=true 
PUPPETEER_EXECUTABLE_PATH=/usr/bin/chromium-browser
RUN npm install puppeteer@10.0.0
RUN addgroup -S pptruser && adduser -S -g pptruser pptruser 
&& mkdir -p /home/pptruser/Downloads /app 
&& chown -R pptruser:pptruser /home/pptruser 
&& chown -R pptruser:pptruser /app
# USER pptruser
USER root
COPY --from=builder /app/package.json ./
COPY --from=builder /app/package-lock.json ./
COPY --from=builder /app/.env ./
COPY --from=builder /app/build ./build
COPY --from=builder /app/node_modules ./node_modules
EXPOSE 8081
CMD ["node", "build/src/index.js"]

I got ERROR at:

=> ERROR [builder 3/9] COPY backend/package.json backend/package-lock.json ./                                   0.0s 
=> CACHED [builder 4/9] RUN npm install                                                                         0.0s 
=> ERROR [builder 5/9] COPY backend/src/ ./src                                                                  0.0s 
=> ERROR [builder 6/9] COPY backend/.env ./                                                                     0.0s 
=> ERROR [builder 7/9] COPY backend/.babelrc ./                                                                 0.0s 

我目录:

|-docker-compose.yml
|-backend
| |-src
| |-package.json
| |-package-lock.json 
| |-build
| |-...
|-docker
| |-Dockerfile.backend
| |-Dockerfile.frontend
|....

Answer 1

这通常发生在Dockerfile找不到文件夹时，例如

Dockerfile:

FROM alpine:3.8
COPY backend /tmp

执行:

$ docker build .
Sending build context to Docker daemon  2.048kB
Step 1/2 : FROM alpine:3.8
---> c8bccc0af957
Step 2/2 : COPY backend /tmp
COPY failed: stat /var/lib/docker/tmp/docker-builder736780062/backend: no such file or directory

确保context文件夹(这里是docker)有backend文件夹。

对你来说，正确的方法应该是:

version: "3"
services:
backend:
build:
context: .
dockerfile: docker/Dockerfile.backend