如何在docker python API中流式传输日志？ [英] How to stream the logs in docker python API?

问题描述

我正在使用docker python API从Dockerfile构建映像。

I am building an image from a Dockerfile using the docker python API.

import os
import sys
import os.path
import docker


client = docker.from_env()
try:
    here = os.path.dirname(__file__)
    no_cache = False
    dockerfile = os.path.join(here, 'app', 'nextdir')
    image = client.images.build(path=dockerfile, tag='app:v.2.4', nocache=no_cache, stream=True)

操作成功完成，但是我无法流式传输日志。该API表示：

The operation finishes successfully, however I was not able to stream the logs. The API says:

返回一个阻塞生成器，您可以对其进行迭代以在生成
输出时进行检索

Return a blocking generator you can iterate over to retrieve build output as it happens

。

如何在python中获取这些日志？

How can I get these logs in python?

推荐答案

可以使用 docker-py 如下，

        here = os.path.dirname(__file__)
        dockerfile = os.path.join(here, 'app', 'nextdir')
        docker_client = docker.APIClient(base_url='unix://var/run/docker.sock')
        generator = docker_client.build(path=dockerfile, tag='app:v.2.4', rm=True)
        while True:
            try:
                output = generator.__next__
                output = output.strip('\r\n')
                json_output = json.loads(output)
                if 'stream' in json_output:
                    click.echo(json_output['stream'].strip('\n'))
            except StopIteration:
                click.echo("Docker image build complete.")
                break
            except ValueError:
                click.echo("Error parsing output from docker image build: %s" % output)

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