![在这里插入图片描述](https://img-blog.csdnimg.cn/981a55625b834bb682d6164f798fc5ce.png#pic_center)
docker load -i test.tar
报错信息
制作镜像失败:【ApplyLayer exit status1 stdout:stderr:write /home/appuser/.local/MIb/python3.7/site-
packages/scipy/linalg/tests/pycache_/test_decomp_update.cpython-37.pyc:no space left on device
问题排查
是Base Device Size的问题,其默认值是10G,而容器经过一段时间的运行写入文件量早已超过10G,就造成无法写入数据的问题了
Doker 的默认配置
[root@fly ~]
Containers: 8
Running: 8
Paused: 0
Stopped: 0
Images: 8
Server Version: 18.09.0
Storage Driver: devicemapper
Pool Name: docker-0:108-164868621-pool
Pool Blocksize: 65.54kB
Base Device Size: 10.74GB
Backing Filesystem: xfs
Udev Sync Supported: true
Data file: /dev/loop0
Metadata file: /dev/loop1
Data loop file: /public/docker/devicemapper/devicemapper/data
Metadata loop file: /public/docker/devicemapper/devicemapper/metadata
Data Space Used: 846.6MB
Data Space Total: 107.4GB
Data Space Available: 106.5GB
Metadata Space Used: 19.81MB
Metadata Space Total: 17.05GB
Metadata Space Available: 17.03GB
Thin Pool Minimum Free Space: 10.74GB
Deferred Removal Enabled: true
Deferred Deletion Enabled: true
Deferred Deleted Device Count: 0
Library Version: 1.02.149-RHEL7 (2018-07-20)
Logging Driver: json-file
Cgroup Driver: systemd
Plugins:
Volume: local
Network: bridge host macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: c4446665cb9c30056f4998ed953e6d4ff22c7c39
runc version: 4fc53a81fb7c994640722ac585fa9ca548971871
init version: fec3683
Security Options:
seccomp
Profile: default
Kernel Version: 3.10.0-957.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 32
Total Memory: 188.2GiB
Name: admin1
ID: 5IMT:GNNU:MFJS:IJJ6:RZJS:7CA7:N5QC:ZSF6:223N:5CB6:NFFM:W2N6
Docker Root Dir: /public/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
192.168.172.128:5000
192.168.172.128:5001
127.0.0.0/8
Registry Mirrors:
http://hub-mirror.c.163.com/
https://registry.docker-cn.com/
https://docker.mirrors.ustc.edu.cn/
Live Restore Enabled: false
Product License: Community Engine
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
WARNING: devicemapper: usage of loopback devices is strongly discouraged for production use.
Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
- Base Device Size: 10.74GB
- Data Space Total: 107.4GB
- Metadata Space Total: 17.05GB
问题解决
调整docker服务端启动参数
[root@fly ~]
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock -s=devicemapper --storage-opt dm.basesize=60G --storage-opt dm.loopmetadatasize=20G
dm.basesize
默认为10G,限制容器和镜像的大小dm.loopdatasize
存储池大小,默认为100Gdm.loopmetadatasize
元数据大小,默认为2Gdm.datadev
存储池设备,默认生成一个/var/lib/docker/devicemapper/devicemapper/data
文件dm.metadatadev
元数据设备,默认生成一个/var/lib/docker/devicemapper/devicemapper/metadata
文件dm.fs
用于基本映像的文件系统(xfs或ext4)dm.blocksize
:精简池的自定义块大小。默认值为64K。
具体可参考官方文档: https://docs.docker.com/engine/reference/commandline/dockerd/
当一个容器的数据空间大于10GB后,那么这个容器将不能写入新的数据文件。如果容器需要很大的数据空间,可以使用数据卷挂在到宿主机或存储上。当容器太多使用数据卷挂载方式后,所有容器使用的数据空间已经大于100GB,这时将不能新建或运行容器。如何突破这种限制,这篇文章给出了解答:https://github.com/docker/docker/tree/master/daemon/graphdriver/devmapper
分两种情况讨论:
1、如果docker第一次启动,在启动docker前,可以使用参数–storage-opt分别指定dm.basesize、dm.loopdatasize、dm.loopmetadatasize等项,指定单个容器可用数据空间、docker可用数据空间、元数据可用数据空间。
2、如果是正在运行的docker,需要导出镜像docker commit、docker push、docker save等操作,然后停止docker服务,删除docker的数据文件(centos6.6是rm -rf /var/lib/docker/)。再修改docker的配置文件/etc/sysconfig/docker,重启docker服务生效。最后导入备份的镜像启动容器。
修改完配置后, 重启docker
systemctl daemon-reload
systemctl restart docker
查看调整
[root@fly ~]
root 23665 1 9 10月12 ? 01:25:52 /usr/bin/dockerd --bip=173.0.52.1/24 --ip-masq=true --mtu=1450 --graph /public/docker --storage-opt dm.basesize
=60G --storage-opt dm.loopmetadatasize=20G
参考
https://docs.docker.com/engine/reference/commandline/dockerd/
https://github.com/moby/moby/tree/master/daemon/graphdriver/devmapper
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