Docker的磁盘空间不足，即使容器很小 [英] Docker runs out of disk space even though containers are small

问题描述

我已经安装了Docker Toolbox for Mac OSX并在里面运行了几个容器。前两个我创建的是Cassandra和运行良好。之后，我创建了2个Debian容器，通过docker终端连接到bash，目的是安装Oracle JDK8。

I have installed Docker Toolbox for Mac OSX and running several containers inside. First two I created were with Cassandra and were running fine. After that I've created 2 Debian containers, connected to bash through docker terminal with the purpose to install Oracle JDK8.

当我要提取java时tarball - 在执行tar命令期间，我有一吨不能写：设备上没有剩余空间错误消息。

At the point when I was about to extract java from the tarball - I've got a ton of "Cannot write: No space left on device" error messages during the execution of "tar" command.

空格：

$ docker ps -s

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                                         NAMES               SIZE

9d8029e21918        debian:latest       "/bin/bash"              54 minutes ago      Up 54 minutes                                                     deb-2               620.5 MB (virtual 744 MB)

49c7a0e37475        debian:latest       "/bin/bash"              55 minutes ago      Up 55 minutes                                                     deb-1               620 MB (virtual 743.5 MB)

66a17af83ca3        cassandra           "/docker-entrypoint.s"   4 hours ago         Up 4 hours          7000-7001/tcp, 7199/tcp, 9042/tcp, 9160/tcp   node-2              40.16 MB (virtual 412.6 MB)

输出我注意到我的一个cassandra的节点丢失。在去检查到Kitematic，发现它是在下面的状态，我不能启动它：无法写入节点，设备上没有剩余空间 - 此尝试显示错误消息。

After seeing that output I noticed that one of my nodes with cassandra is missing. In went to check to Kitematic and found out that it is in the DOWN state and I can't start it: "Cannot write node . No space left on device" - error message shown for this attempt.

Docker必须运行容器吗？

Are there any limits that Docker has to run the containers?

当我删除所有我的cassandra，并留下几个Debian - java能够从tar中提取。

When I remove all my cassandra ones and leave just a couple of Debian - java is able to be extracted from the tar. So the issue is definitely in some Docker settings related to sizing.

在这里，解决空间限制问题的正确方法是什么？

What is the correct way to resolve the issue with space limits here?

UPDATE。

$ docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
cassandra latest 13ea610e5c2b 11小时前374.8 MB
debian jessie 23cb15b0fcec 2周前125.1 MB
debian最新23cb15b0fcec 2周前125.1 MB

df -hi的输出

$ df -hi
文件系统Inodes IUsed IFree IUse％装载在
上251K 38K 214K 15％/
tmpfs 251K 18 251K 1％/ dev
tmpfs 251K 12 251K 1％/ sys / fs / cgroup
tmpfs 251K 38K 214K 15％/ etc / hosts
shm 251K 1 251K 1％/ dev / shm


`df -h 
Filesystem Size Used Avail Use% Mounted on 
none 1.8G 1.8G 0 100% 
/ tmpfs 1002M 0 1002M 0% 
/dev tmpfs 1002M 0 1002M 0% 
/sys/fs/cgroup tmpfs 1.8G 1.8G 0 100% 
/etc/hosts shm 64M 0 64M 0% /dev/shm`

欣赏帮助。

推荐答案

。

默认情况下，docker的内存设置为2048M。

By default the memory for the docker is set to be 2048M by default.

我执行的第一步是停止docker机器：

First step I performed is stopping my docker machine:

$ docker-machine stop default

然后我去了$ HOME / .docker / machine / machines / default /config.json文件，并将内存设置更高，即4096。

Then I went to the $HOME/.docker/machine/machines/default/config.json file and changed the "Memory" setting to be higher, i.e. 4096.

{
    "ConfigVersion": 3,
    "Driver": {
        "VBoxManager": {},
        "IPAddress": "192.168.99.102",
        "MachineName": "default",
        "SSHUser": "docker",
        "SSHPort": 59177,
        "SSHKeyPath": "/Users/lenok/.docker/machine/machines/default/id_rsa",
        "StorePath": "/Users/lenok/.docker/machine",
        "SwarmMaster": false,
        "SwarmHost": "tcp://0.0.0.0:3376",
        "SwarmDiscovery": "",
        "CPU": 1,
        "Memory": 4096, 
        "DiskSize": 204800,
        "Boot2DockerURL": "",
        "Boot2DockerImportVM": "",
        "HostDNSResolver": false,
        "HostOnlyCIDR": "192.168.99.1/24",
        "HostOnlyNicType": "82540EM",
        "HostOnlyPromiscMode": "deny",
        "NoShare": false,
        "DNSProxy": false
    },
    "DriverName": "virtualbox",
    "HostOptions": {
        "Driver": "",
        "Memory": 0,
        "Disk": 0,
        "EngineOptions": {
            "ArbitraryFlags": [],
            "Dns": null,
            "GraphDir": "",
            "Env": [],
            "Ipv6": false,
            "InsecureRegistry": [],
            "Labels": [],
            "LogLevel": "",
            "StorageDriver": "",
            "SelinuxEnabled": false,
            "TlsVerify": true,
            "RegistryMirror": [],
            "InstallURL": "https://get.docker.com"
        },
        "SwarmOptions": {
            "IsSwarm": false,
            "Address": "",
            "Discovery": "",
            "Master": false,
            "Host": "tcp://0.0.0.0:3376",
            "Image": "swarm:latest",
            "Strategy": "spread",
            "Heartbeat": 0,
            "Overcommit": 0,
            "ArbitraryFlags": [],
"config.json" [noeol] 75L, 2560C
            "Overcommit": 0,
            "ArbitraryFlags": [],
            "Env": null
        },
        "AuthOptions": {
            "CertDir": "/Users/lenok/.docker/machine/certs",
            "CaCertPath": "/Users/lenok/.docker/machine/certs/ca.pem",
            "CaPrivateKeyPath": "/Users/lenok/.docker/machine/certs/ca-key.pem",
            "CaCertRemotePath": "",
            "ServerCertPath": "/Users/lenok/.docker/machine/machines/default/server.pem",
            "ServerKeyPath": "/Users/lenok/.docker/machine/machines/default/server-key.pem",
            "ClientKeyPath": "/Users/lenok/.docker/machine/certs/key.pem",
            "ServerCertRemotePath": "",
            "ServerKeyRemotePath": "",
            "ClientCertPath": "/Users/lenok/.docker/machine/certs/cert.pem",
            "ServerCertSANs": [],
            "StorePath": "/Users/lenok/.docker/machine/machines/default"
        }
    },
    "Name": "default" 
}

我的docker机器：

Finally, started my docker machine again:

$ docker-machine start default

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