跳至主要內容
版本：下一個

使用 Docker

注意事項

在建置時期，您無法在Docker容器與主機檔案系統間建立參照連結 (reflink) 或硬連結 (hard link)。 但您仍可透過 BuildKit 的 cache mount 功能，在不同組建間共享快取。 或者，您可以使用 podman，因為它可以在建置時期掛載 Btrfs 磁碟區。

最小化 Docker 映像尺寸及建置時間​

  • 使用較小的映像，例如 node:XX-slim。
  • 盡可能利用多階段建置。
  • 利用 BuildKit 快取掛載區功能。

例一：在 Docker 容器中建置軟體包​

因為僅在建置軟體時需要 devDependencies，您可以將 pnpm install --prod 從 pnpm install 及 pnpm run build 中獨立出來成為單獨的階段，讓最後階段只從先前階段複製必須的檔案，從而降低最終產出映像的大小。

.dockerignore
node_modules
.git
.gitignore
*.md
dist
Dockerfile
FROM node:20-slim AS base
ENV PNPM_HOME="/pnpm"
ENV PATH="$PNPM_HOME:$PATH"
RUN corepack enable
COPY . /app
WORKDIR /app

FROM base AS prod-deps
RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --prod --frozen-lockfile

FROM base AS build
RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --frozen-lockfile
RUN pnpm run build

FROM base
COPY --from=prod-deps /app/node_modules /app/node_modules
COPY --from=build /app/dist /app/dist
EXPOSE 8000
CMD [ "pnpm", "start" ]

例二：在 monorepo 中建置多個 Docker 映像​

假設您的 monorepo 含有三個套件：app1、app2 及 common，app1 及 app2 依賴於 common，但不互相依賴。

您可能會希望只保留每個套件必需的相依性，pnpm deploy 能協助您僅複製必需檔案及套件。

Structure of the monorepo
./
├── Dockerfile
├── .dockerignore
├── .gitignore
├── packages/
│   ├── app1/
│   │   ├── dist/
│   │   ├── package.json
│   │   ├── src/
│   │   └── tsconfig.json
│   ├── app2/
│   │   ├── dist/
│   │   ├── package.json
│   │   ├── src/
│   │   └── tsconfig.json
│   └── common/
│       ├── dist/
│       ├── package.json
│       ├── src/
│       └── tsconfig.json
├── pnpm-lock.yaml
├── pnpm-workspace.yaml
└── tsconfig.json
pnpm-workspace.yaml
packages:
  - 'packages/*'
.dockerignore
node_modules
.git
.gitignore
*.md
dist
Dockerfile
FROM node:20-slim AS base
ENV PNPM_HOME="/pnpm"
ENV PATH="$PNPM_HOME:$PATH"
RUN corepack enable

FROM base AS build
COPY . /usr/src/app
WORKDIR /usr/src/app
RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --frozen-lockfile
RUN pnpm run -r build
RUN pnpm deploy --filter=app1 --prod /prod/app1
RUN pnpm deploy --filter=app2 --prod /prod/app2

FROM base AS app1
COPY --from=build /prod/app1 /prod/app1
WORKDIR /prod/app1
EXPOSE 8000
CMD [ "pnpm", "start" ]

FROM base AS app2
COPY --from=build /prod/app2 /prod/app2
WORKDIR /prod/app2
EXPOSE 8001
CMD [ "pnpm", "start" ]

執行下列命令來建置 app1 和 app2 的映像：

docker build . --target app1 --tag app1:latest
docker build . --target app2 --tag app2:latest

Example 3: Build on CI/CD​

On CI or CD environments, the BuildKit cache mounts might not be available, because the VM or container is ephemeral and only normal docker cache will work.

So an alternative is to use a typical Dockerfile with layers that are built incrementally, for this scenario, pnpm fetch is the best option, as it only needs the pnpm-lock.yaml file and the layer cache will only be lost when you change the dependencies.

Dockerfile
FROM node:20-slim AS base

ENV PNPM_HOME="/pnpm"
ENV PATH="$PNPM_HOME:$PATH"
RUN corepack enable

FROM base AS prod

COPY pnpm-lock.yaml /app
WORKDIR /app
RUN pnpm fetch --prod

COPY . /app
RUN pnpm run build

FROM base
COPY --from=prod /app/node_modules /app/node_modules
COPY --from=prod /app/dist /app/dist
EXPOSE 8000
CMD [ "pnpm", "start" ]