Docker中NPM报错could not get uid/gid错误

问题描述

最近在 Docker 使用 NPM 安装 pm2 中出现could not get uid/gid错误，错误详情如下：

Error: could not get uid/gid
[ 'nobody', 0 ]

    at /usr/local/lib/node_modules/npm/node_modules/uid-number/uid-number.js:37:16
    at ChildProcess.exithandler (child_process.js:296:5)
    at ChildProcess.emit (events.js:182:13)
    at maybeClose (internal/child_process.js:962:16)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:251:5)
TypeError: Cannot read property 'get' of undefined
    at errorHandler (/usr/local/lib/node_modules/npm/lib/utils/error-handler.js:205:18)
    at /usr/local/lib/node_modules/npm/bin/npm-cli.js:78:20
    at cb (/usr/local/lib/node_modules/npm/lib/npm.js:228:22)
    at /usr/local/lib/node_modules/npm/lib/npm.js:266:24
    at /usr/local/lib/node_modules/npm/lib/config/core.js:83:7
    at Array.forEach (<anonymous>)
    at /usr/local/lib/node_modules/npm/lib/config/core.js:82:13
    at f (/usr/local/lib/node_modules/npm/node_modules/once/once.js:25:25)
    at afterExtras (/usr/local/lib/node_modules/npm/lib/config/core.js:173:20)
    at Conf.<anonymous> (/usr/local/lib/node_modules/npm/lib/config/core.js:231:22)
/usr/local/lib/node_modules/npm/lib/utils/error-handler.js:205
  if (npm.config.get('json')) {
                 ^

TypeError: Cannot read property 'get' of undefined
    at process.errorHandler (/usr/local/lib/node_modules/npm/lib/utils/error-handler.js:205:18)
    at process.emit (events.js:182:13)
    at process._fatalException (internal/bootstrap/node.js:491:27)

解决方案

• 在npm install 前加上npm config set unsafe-perm true。
• 使用用 cli 参数 npm i XX --unsafe-perm。

unsafe-perm 配置

查阅npm相关文档：
unsafe-perm

• Default: false if running as root, true otherwise
• Type: Boolean

Set to true to suppress the UID/GID switching when running package scripts. If set explicitly to false, then installing as a non-root user will fail.

针对 unix 平台，使用 root 用户执行 npm 命令时得到的默认值都会是 false。

我的理解大致是避免以 root 的身份去执行时可能造成的安全问题。

参考文档

#20861
npm
What does unsafe-perm in npm actually do?