即使容器很小,Docker 也会耗尽磁盘空间
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.
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.
I've checked the space:
$ 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)
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.
Are there any limits that Docker has to run the containers?
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.
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 hours ago 374.8 MB
debian jessie 23cb15b0fcec 2 weeks ago 125.1 MB
debian latest 23cb15b0fcec 2 weeks ago 125.1 MB
The output of df -hi
$ df -hi
Filesystem Inodes IUsed IFree IUse% Mounted on
none 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`
Appreciate help.
解决方案I have resolved this issue in docker somehow.
By default the memory for the docker is set to be 2048M by default.
First step I performed is stopping my docker machine:
$ docker-machine stop default
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"
}
Finally, started my docker machine again:
$ docker-machine start default
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