如何允許具有只讀根文件系統的容器寫入 tmpfs-volume？

Question

我有以下問題：

我的 nginx 容器以只讀根文件系統開始，我已經配置了兩個 tmpfs-mounts：/var/run 和 /var/cache/nginx 就像那里描述的那樣： https://hub.docker.com/_/nginx

在啟動時 nginx 拋出此錯誤並且容器停止： 2021/08/26 06:31:16 [emerg] 1#1: mkdir() "/var/cache/nginx/client_temp" failed (30: Read-only file system )

這是我的 ecs 任務配置：

{ 
    "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"
    },

我怎樣才能讓 /var/cache/nginx 掛載 rw？

非常感謝您的幫助！

Answer 1

答案是配置錯誤！

這是正確的方法，tmpfs 必須包含在 linuxParameters 中：

"linuxParameters": {
    "tmpfs": [
      {
        "containerPath": "/var/log/nginx",
        "mountOptions": [ "rw" ],
        "size": 50
      },
      {
        "mountOptions": [ "rw" ],
        "containerPath": "/run",
        "size": 10
      },
      {
        "mountOptions": [ "rw"],
        "containerPath": "/var/cache/nginx",
        "size": 10
      },
      {
        "mountOptions": [ "rw"],
        "containerPath": "/tmp",
        "size": 10
      }
    ]
    }

Answer 2

查看文檔， tmpfs接受Array of Tmpfs objects 。

您似乎兩次傳遞tmpfs ，而不是傳遞一個數組。 正確傳遞數組應該有效：

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