从 ECS 主机访问 rexray/ebs 卷

问题描述

我已经设法遵循 https://aws.amazon.com/blogs/compute/amazon-ecs-and-docker-volume-drivers-amazon-ebs/ 并使用 rex-ray Docker 卷插件在 ECS 上运行我的基于容器的服务。通过使用 docker exec -it <id> /bin/sh

登录到 Docker 容器，我可以看到我的服务正在卷内生成数据

主机 EC2 实例上是否有可以检查该数据的位置？ rex-ray 卷是否安装在主机实例的任何位置？

我正在运行一个单节点 ECS 集群。我使用了以下任务定义。我在卷下的主机中声明了 sourcePath，但我在主机容器上没有看到任何 outputs 目录。

{
"ipcMode": null,"executionRoleArn": null,"containerDeFinitions": [
    {
        "dnsSearchDomains": null,"environmentFiles": null,"logConfiguration": {
            "logDriver": "awslogs","secretoptions": null,"options": {
                "awslogs-group": "/ecs/xxxxx","awslogs-region": "us-east-1","awslogs-stream-prefix": "ecs"
            }
        },"entryPoint": null,"portMappings": [],"command": null,"linuxParameters": null,"cpu": 0,"environment": [
            {
                "name": "save_path","value": "/outputs"
            },{
                "name": "watchdog_limit","value": "60"
            },{
                "name": "max_records_per_file","value": "14400"
            }
        ],"resourceRequirements": null,"ulimits": null,"dnsServers": null,"mountPoints": [
            {
                "readOnly": null,"containerPath": "/outputs","sourceVolume": "rexray_volume"
            }
        ],"workingDirectory": null,"secrets": null,"dockerSecurityOptions": null,"memory": null,"memoryReservation": 300,"volumesFrom": [],"stopTimeout": null,"image": "xxxxxxxxxxxxxxx.dkr.ecr.us-east-1.amazonaws.com/xxxxxxxxx:1.1","startTimeout": null,"firelensConfiguration": null,"dependsOn": null,"disableNetworking": null,"interactive": null,"healthCheck": null,"essential": true,"links": null,"hostname": null,"extraHosts": null,"pseudoTerminal": null,"user": null,"readonlyRootFilesystem": null,"dockerLabels": null,"systemControls": null,"privileged": null,"name": "datafeed"
    }
],"taskRoleArn": null,"family": "Xxxxxxxx","pidMode": null,"requiresCompatibilities": [
    "EC2"
],"networkMode": null,"cpu": null,"inferenceAccelerators": [],"proxyConfiguration": null,"volumes": [
    {
        "fsxWindowsFileServerVolumeConfiguration": null,"efsVolumeConfiguration": null,"name": "rexray_volume","host": {
            "sourcePath": "/outputs"
        },"dockerVolumeConfiguration": {
            "autoprovision": true,"scope": "shared","driver": "rexray/ebs","driverOpts": {
                "volumetype": "gp3","size": "20"
            }
        }
    }
],"placementConstraints": [],"tags": []

}

解决方法

我设法访问了这些文件。设备已安装到 /var/lib/docker/plugins 文件夹内的路径。

这可以使用命令 lsblk 来识别。由于设备已经挂载，因此无法再次挂载到其他位置，但是，您可以创建一个 --bind 挂载到更方便的位置。

sudo mount --bind /var/lib/docker/plugins/xxxxxx/propagated-mount/volumes/rexray_vol outputs/

不过，我确实需要 su 才能访问文件。如果您有更好的解决方案，请告诉我。