boto3：调用ecsexecute_command后如何接收输出

Question

我想使用 python/boto3 向 ecs/FARGATE 容器发送命令。 我可以使用 execute_command 成功打开会话。

但是我怎样才能获得命令的输出呢？然后等到完成？

我找到了很多关于 aws cli 和 session-manager-plugin 的信息。因此一种方法是从 python 运行 aws cli。但是还有没有办法从原生 python 获取命令的输出？

Answer 1

您可以重新实现

aws execute-command

内部使用的相同过程：

            # making an execute-command call to connect to an
            # active session on a container would require
            # session-manager-plugin to be installed on the client machine.
            # Hence, making this empty session-manager-plugin call
            # before calling execute-command to ensure that
            # session-manager-plugin is installed
            # before execute-command-command is made
            check_call(["session-manager-plugin"])
            client = self._session.create_client(
            ...
            response = client.execute_command(**parameters)
            ...
            ssm_request_params = build_ssm_request_paramaters(response, client)
            # ignore_user_entered_signals ignores these signals
            # because if signals which kills the process are not
            # captured would kill the foreground process but not the
            # background one. Capturing these would prevents process
            # from getting killed and these signals are input to plugin
            # and handling in there
            with ignore_user_entered_signals():
                # call executable with necessary input
                check_call(["session-manager-plugin",
                ...

此代码作者的提交消息总结了该方法：

https://github.com/ronalddiero/aws-cli/commit/ba4163d46969a8aba0e4712852aba9ad5a3f3667

ECS EXECUTE-COMMAND API 的 CLI 自定义

• ECS执行命令API使用以下命令返回streamUrl和令牌值 用户可以通过调用连接到正在运行的容器内的会话 具有这些值的会话管理器插件。
• 此 CLI 自定义为用户进行此调用，因此在内部 拨打两个电话。