大佬教程收集整理的这篇文章主要介绍了Docker 构建步骤不持久化文件系统更改，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
我有一个多阶段 Dockerfile，用于构建包含 webpacked 前端资产的 Rails 应用。
带有 RUN bin/rails assets:precompile 的步骤调用 webpack 构建所有要发布到 public/packs 的 .Js 和 .CSS 资产。这工作正常。问题是，此 RUN 步骤的更改不会持久化。人们会期望以下内容起作用：
RUN bin/rails assets:precompile && \
test -d /opt/app/public/packs && \
ls /opt/app/public/packs/* && \
du -sh /opt/app/public/packs
RUN ls /opt/app/public/packs/*
第一个命令执行得很好并显示了所有构建的资产。伟大的。第二个命令失败：
ls: cAnnot access '/opt/app/public/packs/*': No such file or directory
我已经使用 --no-cache 构建了图像并获得了相同的结果。我也在我们的 CI 工作流程中看到了同样的结果。
问题是：什么会导致 RUN 步骤的结果无法保存？
这是构建过程的一个例外，表明资产构建工作正常，结果可以看到：
Step 34/35 : RUN bin/rails assets:precompile && test -d /opt/app/public/packs && ls /opt/app/public/packs/* && du -sh /opt/app/public/packs
---> Running in 5c31033bd34c yarn install v1.22.10 [1/4] Resolving packages...
success Already up-to-date. Done in 0.39s. Compiling...
Compiled all packs in /opt/app/public/packs yarn run v1.22.10 $ /opt/node_modules/.bin/webpack --config /opt/app/config/webpack/production.Js
Hash: 3a1c2a59a582aeab432b Version: webpack 4.44.2
Time: 16798ms Built at: 03/23/2021 11:04:01 AM
Asset Size Chunks Chunk names
CSS/application-ad4e93e8.CSS 195 KiB 0,1,2 [emitted] [immutable] application
CSS/application-ad4e93e8.CSS.br 27.1 KiB [emitted]
CSS/application-ad4e93e8.CSs.gz 34.9 KiB [emitted]
CSS/stylesheets-ad4e93e8.CSS 195 KiB 2 [emitted] [immutable] stylesheets
CSS/stylesheets-ad4e93e8.CSS.br 27.1 KiB [emitted]
CSS/stylesheets-ad4e93e8.CSs.gz 34.9 KiB [emitted]
Js/application-71c9136107a4a504df9b.Js 569 KiB 0,2 [emitted] [immutable] [big] application
Js/application-71c9136107a4a504df9b.Js.liCENSE.txt 2.2 KiB [emitted]
Js/application-71c9136107a4a504df9b.Js.br 122 KiB [emitted]
Js/application-71c9136107a4a504df9b.Js.gz 148 KiB [emitted]
Js/application-71c9136107a4a504df9b.Js.map 1.86 MiB 0,2 [emitted] [dev] application
Js/application-71c9136107a4a504df9b.Js.map.br 402 KiB [emitted] [big]
Js/application-71c9136107a4a504df9b.Js.map.gz 491 KiB [emitted] [big]
Js/images-aef2116965a80a23e5d5.Js 1.31 KiB 1 [emitted] [immutable] images
Js/images-aef2116965a80a23e5d5.Js.br 600 bytes [emitted]
Js/images-aef2116965a80a23e5d5.Js.gz 673 bytes [emitted]
Js/images-aef2116965a80a23e5d5.Js.map 5.13 KiB 1 [emitted] [dev] images
Js/images-aef2116965a80a23e5d5.Js.map.br 1.72 KiB [emitted]
Js/images-aef2116965a80a23e5d5.Js.map.gz 1.92 KiB [emitted]
Js/stylesheets-3d6d364a819b59783614.Js 1010 bytes 2 [emitted] [immutable] stylesheets
Js/stylesheets-3d6d364a819b59783614.Js.br 468 bytes [emitted]
Js/stylesheets-3d6d364a819b59783614.Js.gz 519 bytes [emitted]
Js/stylesheets-3d6d364a819b59783614.Js.map 4.55 KiB 2 [emitted] [dev] stylesheets
Js/stylesheets-3d6d364a819b59783614.Js.map.br 1.55 KiB [emitted]
Js/stylesheets-3d6d364a819b59783614.Js.map.gz 1.72 KiB [emitted]
manifest.Json 2.63 KiB [emitted]
manifest.Json.br 598 bytes [emitted]
manifest.Json.gz 681 bytes [emitted]
media/Fonts/Fontawesome-webFont-674f50d2.eot 162 KiB [emitted]
media/Fonts/Fontawesome-webFont-674f50d2.eot.br 88.3 KiB [emitted]
media/Fonts/Fontawesome-webFont-674f50d2.eot.gz 95.9 KiB [emitted]
media/Fonts/Fontawesome-webFont-912ec66d.svg 434 KiB [emitted] [big]
media/Fonts/Fontawesome-webFont-912ec66d.svg.br 108 KiB [emitted]
media/Fonts/Fontawesome-webFont-912ec66d.svg.gz 131 KiB [emitted]
media/Fonts/Fontawesome-webFont-af7ae505.woff2 75.4 KiB [emitted]
media/Fonts/Fontawesome-webFont-b06871f2.ttf 162 KiB [emitted]
media/Fonts/Fontawesome-webFont-b06871f2.ttf.br 88.3 KiB [emitted]
media/Fonts/Fontawesome-webFont-b06871f2.ttf.gz 95.8 KiB [emitted]
media/Fonts/Fontawesome-webFont-fee66e71.woff 95.7 KiB [emitted]
media/images/Fonts/Noah-ExtraBold-276b1b48304f694814bb94f404ce806c.otf 106 KiB [emitted]
media/images/Fonts/Noah-ExtraBold-276b1b48304f694814bb94f404ce806c.otf.br 50 KiB [emitted]
media/images/Fonts/Noah-ExtraBold-276b1b48304f694814bb94f404ce806c.otf.gz 59.5 KiB [emitted]
media/images/Fonts/Noah-ExtraBold-c95e32a64b94c190a618a5f7a337b0b6.ttf 135 KiB [emitted]
media/images/Fonts/Noah-ExtraBold-c95e32a64b94c190a618a5f7a337b0b6.ttf.br 54.9 KiB [emitted]
media/images/Fonts/Noah-ExtraBold-c95e32a64b94c190a618a5f7a337b0b6.ttf.gz 64.6 KiB [emitted]
media/images/Fonts/Noah-Regular-160999b118eefa6cf7dad830b2662250.otf 96.5 KiB [emitted]
media/images/Fonts/Noah-Regular-160999b118eefa6cf7dad830b2662250.otf.br 46.4 KiB [emitted]
media/images/Fonts/Noah-Regular-160999b118eefa6cf7dad830b2662250.otf.gz 54.4 KiB [emitted]
media/images/icon/contact-icon-4948ACB3b4a035afc087d4a49006bdc1.png 1.13 KiB [emitted]
media/images/icon/credit-card-5e76418433bf1520bb14dbb2d059f2f6.png 1.04 KiB [emitted]
media/images/logo-a53b7b1aecd172e93f6f7f75aae92186.svg 3.91 KiB [emitted]
media/images/logo-a53b7b1aecd172e93f6f7f75aae92186.svg.br 1.43 KiB [emitted]
media/images/logo-a53b7b1aecd172e93f6f7f75aae92186.svg.gz 1.67 KiB [emitted]
media/images/logo_red-04d88826aba647ad737f64c8fd5f42ec.png 4.13 KiB [emitted]
media/images/three-dots-7627bc820cce40098e897ca98413d895.svg 1.47 KiB [emitted]
media/images/three-dots-7627bc820cce40098e897ca98413d895.svg.br 307 bytes [emitted]
media/images/three-dots-7627bc820cce40098e897ca98413d895.svg.gz 377 bytes [emitted]
Entrypoint application [big] = CSS/application-ad4e93e8.CSS Js/application-71c9136107a4a504df9b.Js Js/application-71c9136107a4a504df9b.Js.map
Entrypoint images = Js/images-aef2116965a80a23e5d5.Js Js/images-aef2116965a80a23e5d5.Js.map
Entrypoint stylesheets = CSS/stylesheets-ad4e93e8.CSS Js/stylesheets-3d6d364a819b59783614.Js Js/stylesheets-3d6d364a819b59783614.Js.map
[26] ./app/webpacker/images/logo_red.png 104 bytes {0} {1} [built]
[27] ./app/webpacker/images/icon/contact-icon.png 113 bytes {0} {1} [built]
[28] ./app/webpacker/images/icon/credit-card.png 112 bytes {0} {1} [built]
[44] ./app/webpacker/packs/stylesheets.sCSS 39 bytes {0} {2} [built]
[45] ./app/webpacker/packs/images.Js + 1 modules 141 bytes {0} {1} [built]
| ./app/webpacker/packs/images.Js 18 bytes [built]
| ./app/webpacker/images/index.Js 108 bytes [built]
[83] ./app/webpacker/packs/application.Js 1.33 KiB {0} [built]
[127] ./app/webpacker/src/JavaScripts/general.Js 86 bytes {0} [built]
[128] ./app/webpacker/src/JavaScripts/cocoon.Js 3.97 KiB {0} [built]
[129] ./app/webpacker/images sync \.(gif|jpg|png|svg|eot|otf|ttf|woff|woff2)$/ 361 bytes {0} [built]
[130] ./app/webpacker/images/Fonts/Noah-ExtraBold.otf 116 bytes {0} [optional] [built]
[131] ./app/webpacker/images/Fonts/Noah-ExtraBold.ttf 116 bytes {0} [optional] [built]
[132] ./app/webpacker/images/Fonts/Noah-Regular.otf 114 bytes {0} [optional] [built]
[133] ./app/webpacker/images/logo.svg 100 bytes {0} [optional] [built]
[134] ./app/webpacker/images/three-dots.svg 106 bytes {0} [optional] [built]
[135] ../node_modules/@rails/actiontext/app/JavaScript/actiontext/index.Js + 1 modules 2.64 KiB {0} [built]
| 2 modules
+ 122 hIDden modules
WARNING in asset size limit: The following asset(s) exceed the recommended size limit (244 KiB).
This can impact web perfoRMANce.
Assets:
media/Fonts/Fontawesome-webFont-912ec66d.svg (434 KiB)
Js/application-71c9136107a4a504df9b.Js (569 KiB)
Js/application-71c9136107a4a504df9b.Js.map.gz (491 KiB)
Js/application-71c9136107a4a504df9b.Js.map.br (402 KiB)
WARNING in entrypoint size limit: The following entrypoint(s) combined asset size exceeds the recommended limit (244 KiB). This can impact web perfoRMANce.
Entrypoints:
application (764 KiB)
CSS/application-ad4e93e8.CSS
Js/application-71c9136107a4a504df9b.Js
WARNING in webpack perfoRMANce recommendations:
You can limit the size of your bundles by using @R_301_5565@() or require.ensure to lazy load some parts of your application.
For more info visit https://webpack.Js.org/guIDes/code-splitTing/
Child mini-css-extract-plugin ../node_modules/css-loader/dist/cJs.Js??ref--7-1!../node_modules/postcss-loader/src/index.Js??ref--7-2!../node_modules/sass-loader/dist/cJs.Js??re
f--7-3!app/webpacker/packs/stylesheets.sCSS:
Entrypoint mini-css-extract-plugin = *
[0] ../node_modules/css-loader/dist/cJs.Js??ref--7-1!../node_modules/postcss-loader/src??ref--7-2!../node_modules/sass-loader/dist/cJs.Js??ref--7-3!./app/webpacker/packs/st
ylesheets.sCSS 829 KiB {0} [built]
[3] ./app/webpacker/images/Fonts/Noah-ExtraBold.otf 116 bytes {0} [built]
[4] ./app/webpacker/images/Fonts/Noah-ExtraBold.ttf 116 bytes {0} [built]
[5] ./app/webpacker/images/Fonts/Noah-Regular.otf 114 bytes {0} [built]
+ 8 hIDden modules
Done in 17.52s.
/opt/app/public/packs/manifest.Json
/opt/app/public/packs/manifest.Json.br
/opt/app/public/packs/manifest.Json.gz
/opt/app/public/packs/CSS:
application-ad4e93e8.CSS
application-ad4e93e8.CSS.br
application-ad4e93e8.CSs.gz
stylesheets-ad4e93e8.CSS
stylesheets-ad4e93e8.CSS.br
stylesheets-ad4e93e8.CSs.gz
/opt/app/public/packs/Js:
application-71c9136107a4a504df9b.Js
application-71c9136107a4a504df9b.Js.liCENSE.txt
application-71c9136107a4a504df9b.Js.br
application-71c9136107a4a504df9b.Js.gz
application-71c9136107a4a504df9b.Js.map
application-71c9136107a4a504df9b.Js.map.br
application-71c9136107a4a504df9b.Js.map.gz
images-aef2116965a80a23e5d5.Js
images-aef2116965a80a23e5d5.Js.br
images-aef2116965a80a23e5d5.Js.gz
images-aef2116965a80a23e5d5.Js.map
images-aef2116965a80a23e5d5.Js.map.br
images-aef2116965a80a23e5d5.Js.map.gz
stylesheets-3d6d364a819b59783614.Js
stylesheets-3d6d364a819b59783614.Js.br
stylesheets-3d6d364a819b59783614.Js.gz
stylesheets-3d6d364a819b59783614.Js.map
stylesheets-3d6d364a819b59783614.Js.map.br
stylesheets-3d6d364a819b59783614.Js.map.gz
/opt/app/public/packs/media:
Fonts
images
6.4M /opt/app/public/packs
Removing intermediate container 5c31033bd34c
---> 45c4a0be56fe
Step 35/35 : RUN ls /opt/app/public/packs/
---> Running in 5ade2c36f7c4
ls: cAnnot access '/opt/app/public/packs/': No such file or directory
The command '/bin/sh -c ls /opt/app/public/packs/' returned a non-zero code: 2
这是整个 Dockerfile：
# Allow the image to be built with any Ruby version.
# This arg is only available at build time and only usable by the `FROM` lines.
ARG ruby_version=2.7
################################################################################
# Base image with dependencIEs to support development and production images.
#
FROM ruby:${ruby_version}-slim AS base
# git-core: fetching gems stored in git repos
# build-essential building native gems (gcc,make,etC)
# libpq-dev POSTGResql development headers for building `pg` gem
RUN apt-get update && \
apt-get upgrade -y && \
apt-get install -y --no-install-recommends \
git-core \
build-essential \
libpq-dev \
curl
# Install node and yarn for dealing with webpack assets
RUN curl -fsSL https://deb.nodesource.com/setup_14.x | bash - && \
apt-get install -y nodeJs && \
npm install --global yarn && \
echo '--modules-folder /opt/node_modules' >> ~/.yarnrc
# update RubyGems system software
RUN gem update --system --silent
# Create a directory for custom binarIEs and executable scripts
RUN mkdir /opt/bin
ENV PATH=/opt/bin:$PATH
# Add Helper script that will ensure the correct version of Bundler is installed
copY docker/install-bundler.sh /opt/bin/install-bundler
# Add entrypoint used during development that ensures gems are up to date
copY docker/entrypoint.dev.sh /opt/bin/entrypoint-dev
# Home of the application source code.
workdir /opt/app
VolUME /opt/app
# Specify the target application environment of this build
# It should be one of:
# development,test,production
ARG app_env
ENV APP_ENV=$app_env \
NODE_ENV=$app_env \
RAILS_ENV=$app_env \
RAILS_LOG_TO_STDOUT=true
################################################################################
# Stage that includes bundler,the gems,and source code
#
# Used by the test runner in CI and for building standlone runnable images
# that will work for any environment. Not used by docker-compose.
FROM base AS app
copY Gemfile Gemfile.lock /opt/app/
RUN install-bundler
# Use Helper script that runs 'bundle install' appropriately given the APP_ENV
copY docker/bundle-install-env.sh /opt/bin/bundle-install-env
RUN bundle-install-env
# copy specific files and directorIEs we need to run the app
copY .rubocop.yml config.ru Rakefile ./
copY app/ ./app/
copY bin/ ./bin/
copY config/ ./config/
copY db/ ./db/
copY lib/ ./lib/
copY public/ ./public/
copY test/ ./test/
copY vendor/ ./vendor/
# Pre-compile and cache code using bootsnap
RUN bin/bootsnap precompile --gemfile app/ lib/
################################################################################
# Builder stage for release image prep
#
FROM app AS builder
# Remove cached .gem files and gem component we don't need (e.g. tests,docs)
# This is to save space in the final image.
RUN rm /usr/local/bundle/cache/*.gem && \
rm -rf /usr/local/bundle/gems/*/{Benchmarks,doc,example,perf,spec,tests}/
copY babel.config.Js package.Json postCSs.config.Js yarn.lock ./
RUN yarn install
# Rails refuses to run the precompile without a secret_key_base
ENV SECRET_KEY_BASE=00000000000000000000000000000000000000000000
RUN bin/rails assets:precompile && \
test -d /opt/app/public/packs && \
ls /opt/app/public/packs/* && \
du -sh /opt/app/public/packs
RUN ls /opt/app/public/packs/
# ... omitted the final diStribution stage based on a fresh image; it never gets that far
删除 VOLUME 行。
VOLUME 指令唯一特别明显的效果是它可以防止任何后续的 RUN 命令更改该目录。在 Dockerfile 中声明 VOLUME 几乎是不必要的（并且卷不适合源代码的存储）；您可以删除该行，不会发生任何不好的事情。
以上是大佬教程为你收集整理的Docker 构建步骤不持久化文件系统更改全部内容，希望文章能够帮你解决Docker 构建步骤不持久化文件系统更改所遇到的程序开发问题。
如果觉得大佬教程网站内容还不错，欢迎将大佬教程推荐给程序员好友。
本图文内容来源于网友网络收集整理提供，作为学习参考使用，版权属于原作者。
如您有任何意见或建议可联系处理。小编QQ：384754419，请注明来意。