我正在使用dockerode
库,我想创建一个容器,执行一个(单个)命令并返回(单独)标准输出和标准错误该命令。从Node.js中的码头容器获取stdout和stderr流
到目前为止,我能够得到标准输出,但我没有运气标准错误。我发现很多方法在Github的问题,但没有一个工作。
的代码我已经是(我使用的承诺和协同程序,以避免回调):
const Promise = require('bluebird');
const coroutine = Promise.coroutine;
const Docker = require('dockerode');
const docker = coroutine.promisifyAll(new Docker());
const foo = coroutine(function*(){
let container = Promise.promisifyAll(yield docker.createContainerAsync(/*...*/));
yield container.startAsync(/*...*/);
const execOpts = {Cmd: /*...*/, AttachStdout: true, AttachStderr: true, Tty: true};
const exec = Promise.promisifyAll(yield container.execAsync(execOpts));
const stream = yield exec.startAsync();
let data = [];
stream.on('data', chunk => {
data.push(chunk);
});
stream.on('end',() => {
stdoutData = Buffer.concat(data).toString()
});
let executionData = yield exec.inspectAsync();
while (executionData.Running) { executionData = yield exec.inspectAsync(); }
return {
stdout: stdoutData,
stderr:
}
});
注意:在dockerode's npm documentation有这个例子中实现我想要的东西,但我无法找出什么全局对象process
,以及如何使用它在我的代码:
//tty:true
docker.createContainer({ /*...*/ Tty: true /*...*/ }, function(err, container) {
/* ... */
container.attach({stream: true, stdout: true, stderr: true}, function (err, stream) {
stream.pipe(process.stdout);
});
/* ... */
}
//tty:false
docker.createContainer({ /*...*/ Tty: false /*...*/ }, function(err, container) {
/* ... */
container.attach({stream: true, stdout: true, stderr: true}, function (err, stream) {
//dockerode may demultiplex attach streams for you :)
container.modem.demuxStream(stream, process.stdout, process.stderr);
});
/* ... */
}
docker.createImage({fromImage: 'ubuntu'}, function (err, stream) {
stream.pipe(process.stdout);
});