Of Stack

Detail nodejs to create a minimum docker image

  • 2020-06-12 11:33:17
  • OfStack

Using docker to run the service, you can have 1 environment, exact control over the running resources of the service (cpu, memory), easy port and network Settings, and use mirror storage to manage and distribute code. More and more developers are choosing to run their services on docker.

Many nodejs users use the default node image when using docker. But don't you think it's too big? now node:6.10.1 The mirror image volume has reached 666M, in fact, to achieve the same function, only 43.5ES11en is enough. Small size means lower resource consumption, faster download speeds, and smaller transmission bandwidth. Here's how to create a minimalist node image.

FROM: Sets the alpine base image

The lightest operating system currently available under docker is alpine, with one alpine being less than 5M. node default image depends on the base image of debian, debian:jessie volume has been 123M, so to reduce the size, the first thing is to switch from the base image to alpine.

FROM alpine:3.5

RUN: Set up the node user 


adduser -D -u 1000 node

Setting the node user is optional. After adding a user to the run container, it is possible to specify the identity of the node user to run the service

RUN: Install the node compiler tool 


apk add --no-cache \
  libstdc++ \
&& apk add --no-cache --virtual .build-deps \
  binutils-gold \
  curl \
  g++ \
  gcc \
  gnupg \
  libgcc \
  linux-headers \
  make \
  python
apk add --no-cache Instead of using a local cache of the installation package database, get installation package information directly from a remote location. This eliminates the need to get the installation package database through apk update apk add --virtual .build-deps Package all packages for this installation into one virtual package named.build-ES56en. The advantage of this is that it can be passed apk del .build-deps The 1 key clears these packages

RUN: Import the node source package public key 


for key in \
  9554F04D7259F04124DE6B476D5A82AC7E37093B \
  94AE36675C464D64BAFA68DD7434390BDBE9B9C5 \
  FD3A5288F042B6850C66B31F09FE44734EB7990E \
  71DCFD284A79C3B38668286BC97EC7A07EDE3FC1 \
  DD8F2338BAE7501E3DD5AC78C273792F7D83545D \
  B9AE9905FFD7803F25714661B63B535A4C206CA9 \
  C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8 \
  56730D5401028683275BD23C23EFEFE93C4CFFFE \
; do \
gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
done

These public keys will be used to verify the nodejs source file we downloaded from curl

RUN: Download and verify the node source file 


curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION.tar.xz" \
&& curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" \
&& gpg --batch --decrypt --output SHASUMS256.txt SHASUMS256.txt.asc \
&& grep " node-v$NODE_VERSION.tar.xz\$" SHASUMS256.txt | sha256sum -c -

$NODE_VERSION: node version, as 6.10.1

RUN: Compile and install node 


tar -xf "node-v$NODE_VERSION.tar.xz" \
&& cd "node-v$NODE_VERSION" \
&& ./configure \
&& make -j$(getconf _NPROCESSORS_ONLN) \
&& make install
If npm is not required, you can replace the third behavior && ./configure --without-npm $NODE_VERSION : refers to node version, as 6.10.1

RUN: clean up 


apk del .build-deps \
&& cd .. \
&& rm -Rf "node-v$NODE_VERSION" \
&& rm "node-v$NODE_VERSION.tar.xz" SHASUMS256.txt.asc SHASUMS256.txt

$NODE_VERSION: node version, as 6.10.1

CMD: Set the mirror entry to node 


CMD [ "node" ]

The above steps are required to create an nodejs image. The following steps are added as needed

Install yarn

Install dependencies 


apk add --no-cache --virtual .build-deps-yarn curl gnupg

Import the public key 


for key in \
6A010C5166006599AA17F08146C2130DFD2497F5 \
; do \
 gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
done

Download check 


 curl -fSL -o yarn.js "https://yarnpkg.com/downloads/$YARN_VERSION/yarn-legacy-$YARN_VERSION.js" \
 && curl -fSL -o yarn.js.asc "https://yarnpkg.com/downloads/$YARN_VERSION/yarn-legacy-$YARN_VERSION.js.asc" \
 && gpg --batch --verify yarn.js.asc yarn.js \
 && rm yarn.js.asc

$YARN_VERSION: Refers to yarn version, such as 0.22

The installation 


apk add --no-cache \
  libstdc++ \
&& apk add --no-cache --virtual .build-deps \
  binutils-gold \
  curl \
  g++ \
  gcc \
  gnupg \
  libgcc \
  linux-headers \
  make \
  python
0

Clean up the 


apk add --no-cache \
  libstdc++ \
&& apk add --no-cache --virtual .build-deps \
  binutils-gold \
  curl \
  g++ \
  gcc \
  gnupg \
  libgcc \
  linux-headers \
  make \
  python
1

c + + plug-in

To support c++ plug-ins, install python,make,g++ 


apk add --no-cache \
  libstdc++ \
&& apk add --no-cache --virtual .build-deps \
  binutils-gold \
  curl \
  g++ \
  gcc \
  gnupg \
  libgcc \
  linux-headers \
  make \
  python
2

headers file

Some c++ modules also need to download node-headers files in the process of use, node-ES157en files are unstable in domestic download, it is recommended to integrate them into the mirror, otherwise you may encounter a package compilation for a long time without action.

Refer to nodejs source code download verification procedures for headers file download verification 



curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/node-v${NODE_VERSION}-headers.tar.xz"

Install the headers file 


mkdir /root/.node-gyp
tar --strip-component 1 -xzf node-v${NODE_VERSION}-heraders.tar.xz /root/.node-gyp/$NODE_VERSION
rm -rf node-v${NODE_VERSION}-headers.tar.xz

$NODE_VERSION: node, as in 6.10.1

conclusion

Creating a minimum docker image is simple and makes sense

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