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docker - 如何允许具有只读根文件系统的容器写入 tmpfs-volume？

问题描述

我有以下问题：

我的 nginx 容器从只读根文件系统开始，我已经配置了两个 tmpfs 挂载：/var/run 和 /var/cache/nginx，就像那里描述的那样：https ://hub.docker.com/_/nginx

启动时 nginx 抛出此错误并且容器停止： 2021/08/26 06:31:16 [emerg] 1#1: mkdir() "/var/cache/nginx/client_temp" failed (30: Read-only file system )

这是我的 ecs 任务配置：

{ 
    "name": "nginx", 
    "essential": false,
    "readonlyRootFilesystem": true,
    "healthCheck": {
        "command": [
          "CMD-SHELL",
          "curl  --fail 127.0.0.1 || exit 1"
        ],
        "interval": 30,
        "timeout": 2,
        "retries": 3
      },
    "memory": 256,
    "image": "###########.dkr.ecr.eu-central-1.amazonaws.com/nginx:${NGINX_VER}",
    "dockerLabels":
      {
        "Name": "nginx",
        "Component": "sidecar-prometheus",
        "App-Version": "${NGINX_VER}"
      },
    "logConfiguration": {
      "logDriver": "awslogs",
      "options": {
         "awslogs-group": "${LOG_GROUP_NAME}",
         "awslogs-region": "eu-central-1",
         "awslogs-stream-prefix": "${LOG_GROUP_NAME}"
      }
    },
    "portMappings": [
      {
        "containerPort": 10000,
        "hostPort": 10000,
        "protocol": "tcp"
      }
    ],  
    "mountPoints": [
      {
        "readOnly": false,
        "containerPath": "/config",
        "sourceVolume": "VolumeConfig"
      }
    ],
    "tmpfs": {
        "containerPath": "/var/run",
        "size": "50",
        "mountOptions": "rw"
    },
    "tmpfs": {
        "containerPath": "/var/cache/nginx",
        "size": "50",
        "mountOptions": "rw"
    },

我怎样才能使 /var/cache/nginx 挂载 rw ？

非常感谢您的帮助！

标签： dockernginxcontainersamazon-ecs

解决方案

看着文档，tmpfs接受Array of Tmpfs objects。

你似乎传递tmpfs了两次，而不是传递一个数组。正确传递数组应该可以工作：

    "tmpfs": [
      {
        "containerPath": "/var/run",
        "size": "50",
        "mountOptions": "rw"
      },
      {
        "containerPath": "/var/cache/nginx",
        "size": "50",
        "mountOptions": "rw"
      }
    ]

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