使用kaniko缓存运行dockerbuild时，未缓存npmrunbuild

我正在尝试为 React 应用程序 ( github repo )加速我的 Google Cloud Build 。因此，我开始按照官方 Cloud Build 文档中的建议使用 Kaniko Cache。

看来npm install我的构建过程的一部分现在确实被缓存了。但是，我原以为npm run build在源文件未更改时也会缓存。

我的 Dockerfile：

# Base image has ubuntu, curl, git, openjdk, node & firebase-tools installed
FROM gcr.io/team-timesheets/builder as BUILDER   

## Install dependencies for functions first
WORKDIR /functions
COPY functions/package*.json ./

RUN npm ci

## Install app dependencies next
WORKDIR /
COPY package*.json ./

RUN npm ci

# Copy all app source files
COPY . .

# THIS SEEMS TO BE NEVER CACHED, EVEN WHEN SOURCE FILES HAVENT CHANGED
RUN npm run build:refs 
    && npm run build:production

ARG VCS_COMMIT_ID
ARG VCS_BRANCH_NAME
ARG VCS_PULL_REQUEST
ARG CI_BUILD_ID
ARG CODECOV_TOKEN

ENV VCS_COMMIT_ID=$VCS_COMMIT_ID
ENV VCS_BRANCH_NAME=$VCS_BRANCH_NAME
ENV VCS_PULL_REQUEST=$VCS_PULL_REQUEST
ENV CI_BUILD_ID=$CI_BUILD_ID
ENV CODECOV_TOKEN=$CODECOV_TOKEN

RUN npm run test:cloudbuild 
    && if [ "$CODECOV_TOKEN" != "" ]; 
        then curl -s https://codecov.io/bash | bash -s - -X gcov -X coveragepy -X fix -s coverage; 
    fi

WORKDIR /functions

RUN npm run build

WORKDIR /

ARG FIREBASE_PROJECT_ID
ARG FIREBASE_TOKEN

RUN if [ "$FIREBASE_TOKEN" != "" ]; 
       then firebase deploy --project $FIREBASE_PROJECT_ID --token $FIREBASE_TOKEN; 
    fi

构建输出：

BUILD
Pulling image: gcr.io/kaniko-project/executor:latest
latest: Pulling from kaniko-project/executor
Digest: sha256:b9eec410fa32cd77cdb7685c70f86a96debb8b087e77e63d7fe37eaadb178709
Status: Downloaded newer image for gcr.io/kaniko-project/executor:latest
gcr.io/kaniko-project/executor:latest
INFO[0000] Resolved base name gcr.io/team-timesheets/builder to builder 
INFO[0000] Using dockerignore file: /workspace/.dockerignore 
INFO[0000] Retrieving image manifest gcr.io/team-timesheets/builder 
INFO[0000] Retrieving image gcr.io/team-timesheets/builder 
INFO[0000] Retrieving image manifest gcr.io/team-timesheets/builder 
INFO[0000] Retrieving image gcr.io/team-timesheets/builder 
INFO[0000] Built cross stage deps: map[]                
INFO[0000] Retrieving image manifest gcr.io/team-timesheets/builder 
INFO[0000] Retrieving image gcr.io/team-timesheets/builder 
INFO[0000] Retrieving image manifest gcr.io/team-timesheets/builder 
INFO[0000] Retrieving image gcr.io/team-timesheets/builder 
INFO[0001] Executing 0 build triggers                   
INFO[0001] Resolving srcs [functions/package*.json]...  
INFO[0001] Checking for cached layer gcr.io/team-timesheets/app/cache:9307850446a7754b17d62c95be0c1580672377c1231ae34b1e16fc284d43833a... 
INFO[0001] Using caching version of cmd: RUN npm ci     
INFO[0001] Resolving srcs [package*.json]...            
INFO[0001] Checking for cached layer gcr.io/team-timesheets/app/cache:7ca523b620323d7fb89afdd0784f1169c915edb933e1d6df493f446547c30e74... 
INFO[0001] Using caching version of cmd: RUN npm ci     
INFO[0001] Checking for cached layer gcr.io/team-timesheets/app/cache:1fd7153f10fb5ed1de3032f00b9fb904195d4de9dec77b5bae1a3cb0409e4530... 
INFO[0001] No cached layer found for cmd RUN npm run build:refs     && npm run build:production 
INFO[0001] Unpacking rootfs as cmd COPY functions/package*.json ./ requires it. 
INFO[0026] WORKDIR /functions                           
INFO[0026] cmd: workdir                                 
INFO[0026] Changed working directory to /functions      
INFO[0026] Creating directory /functions                
INFO[0026] Taking snapshot of files...                  
INFO[0026] Resolving srcs [functions/package*.json]...  
INFO[0026] COPY functions/package*.json ./              
INFO[0026] Resolving srcs [functions/package*.json]...  
INFO[0026] Taking snapshot of files...                  
INFO[0026] RUN npm ci                                   
INFO[0026] Found cached layer, extracting to filesystem 
INFO[0029] WORKDIR /                                    
INFO[0029] cmd: workdir                                 
INFO[0029] Changed working directory to /               
INFO[0029] No files changed in this command, skipping snapshotting. 
INFO[0029] Resolving srcs [package*.json]...            
INFO[0029] COPY package*.json ./                        
INFO[0029] Resolving srcs [package*.json]...            
INFO[0029] Taking snapshot of files...                  
INFO[0029] RUN npm ci                                   
INFO[0029] Found cached layer, extracting to filesystem 
INFO[0042] COPY . .                                     
INFO[0043] Taking snapshot of files...                  
INFO[0043] RUN npm run build:refs     && npm run build:production 
INFO[0043] Taking snapshot of full filesystem...        
INFO[0061] cmd: /bin/sh                                 
INFO[0061] args: [-c npm run build:refs     && npm run build:production] 
INFO[0061] Running: [/bin/sh -c npm run build:refs     && npm run build:production] 

> thdk-timesheets-app@1.2.16 build:refs /
> tsc -p common


> thdk-timesheets-app@1.2.16 build:production /
> webpack --env=prod

Hash: e33e0aec56687788a186
Version: webpack 4.43.0
Time: 81408ms
Built at: 12/04/2020 6:57:57 AM
....

现在，由于缓存系统的开销，甚至似乎没有速度优势。

我对 Dockerfiles 比较陌生，所以希望我只是在这里遗漏了一条简单的线。

回答

#!/usr/bin/env bash
# only rebuild, if something changed in 'app/'
if [[ ! -z "$(git diff --name-only HEAD HEAD~1 | grep -e '^(app/|package.*)')" ]]; then
  npm run build:ref
  curl -XPOST https://notify.api/deploy/$(git rev-parse --short HEAD)
  // ... further steps ...
fi