【发布时间】:2018-04-05 22:38:13
【问题描述】:
更新
我改变了这个问题的方向,最终利用 Docker 映像层来缓存 npm 安装,除非 package.config see here 发生更改。
注意,关于这个问题,我仍然在从属 Jenkins Docker 映像中构建我的 AngularJs Docker 映像,但我不再在 Docker 从站中运行 npm install,我将我的应用程序文件复制到我的 AngularJs Docker 映像并运行npm install 在 AngularJs Docker 镜像中,从而获得 npm install 的 Docker 缓存层,灵感来自这个伟大的idea/answer here。
-------------------结束更新------------- ----------------
好的,我应该补充一点,我在一个 Docker 容器中,但这可能并不重要,我不会停止容器,并且我有用于 npm 缓存文件夹和 /home 的卷运行 npm 命令的用户的文件夹。
安装了 npm 的 Docker 容器的目的是它是一个构建从站,由 Jenkins 启动以构建一个 AngularJs 应用程序。问题是它非常慢,每次都下载所有需要的 npm 包。
jenkins 是用户,构建服务器上的 jenkins 帐户是“谁”在运行 npm install
我为运行npm install cmd 的用户的npm 文件夹:/home/jenkins/.npm 以及命令npm config get cache 所说的文件夹是我的缓存目录:/root/.npm。容器卷甚至不重要,因为我在运行 npm install 后没有停止容器。
好的,我开始调试的步骤,开始,我用这个命令“bash into the container”:
docker exec -it <container_id> bash
我从现在开始运行的所有命令都连接到安装了 npm 的正在运行的容器。
echo "$HOME" 导致/root
npm config get cache 导致root/.npm
任何时候jenkins 在这个容器中运行npm install,在该命令成功完成后,我运行npm cache ls,它总是产生空的,没有缓存:~/.npm
但是正如我们在ls -a /home/jenkins/.npm/ 中看到的那样,下载了许多软件包:
所以我尝试将 cache-min 设置为一个很长的过期时间:npm config set cache-min 9999999 这没有帮助。
我不知道还能做什么,似乎我的 npm 包都没有被缓存,我如何让 npm 缓存包?
这是一个截断的 npm install 输出:
Downloading binary from https://github.com/sass/node-sass/releases/download/v4.5.3/linux-x64-48_binding.node
Download complete
Binary saved to /home/jenkins/workspace/tsl.frontend.development/node_modules/node-sass/vendor/linux-x64-48/binding.node
Caching binary to /home/jenkins/.npm/node-sass/4.5.3/linux-x64-48_binding.node
Binary found at /home/jenkins/workspace/tsl.frontend.development/node_modules/node-sass/vendor/linux-x64-48/binding.node
Testing binary
Binary is fine
typings WARN deprecated 3/24/2017: "registry:dt/core-js#0.9.7+20161130133742" is deprecated (updated, replaced or removed)
[?25h
+-- app (global)
`-- core-js (global)
这是我的 Dockerfile:
FROM centos:7
MAINTAINER Brian Ogden
RUN yum update -y && \
yum clean all
#############################################
# Jenkins Slave setup
#############################################
RUN yum install -y \
git \
openssh-server \
java-1.8.0-openjdk \
sudo \
make && \
yum clean all
# gen dummy keys, centos doesn't autogen them like ubuntu does
RUN /usr/bin/ssh-keygen -A
# Set SSH Configuration to allow remote logins without /proc write access
RUN sed -ri 's/^session\s+required\s+pam_loginuid.so$/session optional pam_loginuid.so/' /etc/pam.d/sshd
# Create Jenkins User
RUN useradd jenkins -m -s /bin/bash
# Add public key for Jenkins login
RUN mkdir /home/jenkins/.ssh
COPY /files/id_rsa.pub /home/jenkins/.ssh/authorized_keys
#setup permissions for the new folders and files
RUN chown -R jenkins /home/jenkins
RUN chgrp -R jenkins /home/jenkins
RUN chmod 600 /home/jenkins/.ssh/authorized_keys
RUN chmod 700 /home/jenkins/.ssh
# Add the jenkins user to sudoers
RUN echo "jenkins ALL=(ALL) ALL" >> etc/sudoers
#############################################
# Expose SSH port and run SSHD
EXPOSE 22
#Technically, the Docker Plugin enforces this call when it starts containers by overriding the entry command.
#I place this here because I want this build slave to run locally as it would if it was started in the build farm.
CMD ["/usr/sbin/sshd","-D"]
#############################################
# Docker and Docker Compose Install
#############################################
#install required packages
RUN yum install -y \
yum-utils \
device-mapper-persistent-data \
lvm2 \
curl && \
yum clean all
#add Docker CE stable repository
RUN yum-config-manager \
--add-repo \
https://download.docker.com/linux/centos/docker-ce.repo
#Update the yum package index.
RUN yum makecache fast
#install Docker CE
RUN yum install -y docker-ce-17.06.0.ce-1.el7.centos
#install Docker Compose 1.14.0
#download Docker Compose binary from github repo
RUN curl -L https://github.com/docker/compose/releases/download/1.14.0/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
#Apply executable permissions to the binary
RUN chmod +x /usr/local/bin/docker-compose
#############################################
ENV NODE_VERSION 6.11.1
#############################################
# NodeJs Install
#############################################
RUN yum install -y \
wget
#Download NodeJs package
RUN wget https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-x64.tar.gz
#extract the binary package into our system's local package hierarchy with the tar command.
#The archive is packaged within a versioned directory, which we can get rid of by passing the --strip-components 1 option.
#We will specify the target directory of our command with the -C command:
#This will install all of the components within the /usr/local branch
RUN tar --strip-components 1 -xzvf node-v* -C /usr/local
#############################################
#############################################
# npm -setup volume for package cache
# this will speed up builds
#############################################
RUN mkdir /home/jenkins/.npm
RUN chown jenkins /home/jenkins/.npm .
RUN mkdir /root/.npm
RUN chown jenkins /root/.npm .
#for npm cache, this cannot be expressed in docker-compose.yml
#the reason for this is that Jenkins spins up slave containers using
#the docker plugin, this means that there
VOLUME /home/jenkins/.npm
VOLUME /root/.npm
#############################################
【问题讨论】:
-
我很困惑...“在 Docker 容器中”是指使用
docker run或docker exec执行此操作吗? -
我只是 docker exec -it
bash 进入容器运行 cmds -
@DerekBrown 我更新了我的答案以详细说明这一点
-
我能问一下为什么吗?这并不是 Docker 的真正预期功能......
-
@DerekBrown 缓存 npm 包不适合 Docker 吗?为什么这么说?
标签: node.js docker caching npm