在docker容器内的路径中找不到Phantomjs

Question

我正尝试在一个docker容器中安装一堆依赖项，使用Node8作为基础镜像。docker镜像在Ubuntu上构建和运行得很好，但当我在OS X上尝试它时，我得到了这个错误：

Error making request.
Error: getaddrinfo EAI_AGAIN github.com:443
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:67:26)

Please report this full log at https://github.com/Medium/phantomjs
npm WARN backend@1.0.0 No repository field.
npm WARN backend@1.0.0 No license field.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! phantomjs-prebuilt@2.1.16 install: `node install.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the phantomjs-prebuilt@2.1.16 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

Dockerfile：

FROM node:8-alpine

WORKDIR /app
COPY package.json package-lock.json ./
RUN npm install
COPY . /app
# ADD MONGOURL ENV HERE
EXPOSE 5000
CMD ["npm", "start"]

下面是我的所有依赖项：

"dependencies": {
    "body-parser": "^1.18.3",
    "compression": "^1.7.3",
    "cors": "^2.8.4",
    "express": "^4.16.4",
    "html-parse-stringify": "^1.0.3",
    "jsonwebtoken": "^8.3.0",
    "lodash": "^4.17.11",
    "mongoose": "^5.3.3",
    "morgan": "^1.9.1",
    "passport": "^0.4.0",
    "passport-facebook": "^2.1.1",
    "passport-google-oauth": "^1.0.0",
    "query-string": "^6.2.0",
    "request": "^2.88.0",
    "signalr-client": "0.0.19",     // 90% sure this is the one installs phantomjs
    "socket.io": "^2.1.1",
    "swagger-ui-express": "^4.0.1"
  },

为什么会发生这种情况？我以为docker应该能解决这样的问题。

Answer 1

您可以在docker文件中添加一个步骤来安装phantomjs

从节点:8-高山

WORKDIR /app
COPY package.json package-lock.json ./
RUN npm install
COPY . /app
EXPOSE 5000
CMD ["npm", "install", "phantom", "--save"]
CMD ["npm", "start"]

或者在npm包中添加虚拟依赖项。

您的phantomJS脚本将如下所示：

const phantom = require('phantom');

(async function() {
    const instance = await phantom.create();
    const page = await instance.createPage();
    await page.on("onResourceRequested", function(requestData) {
        console.info('Requesting', requestData.url)
    });

    const status = await page.open('https://stackoverflow.com/');
    console.log(status);

    const content = await page.property('content');
    console.log(content);

    await instance.exit();
}());

Answer 2

npm install phantomjs-prebuilt --phantomjs_cdnurl=http://cnpmjs.org/downloads