Docker 容器空间大小设置 - 十

# cat /usr/lib/systemd/system/docker.service

[Unit]
Description=Docker Application Container Engine
Documentation=http://docs.docker.com
After=network.target
Wants=docker-storage-setup.service
Requires=docker-cleanup.timer

[Service]
Type=notify
NotifyAccess=all
EnvironmentFile=-/run/containers/registries.conf
EnvironmentFile=-/etc/sysconfig/docker
EnvironmentFile=-/etc/sysconfig/docker-storage
EnvironmentFile=-/etc/sysconfig/docker-network
Environment=GOTRACEBACK=crash
Environment=DOCKER_HTTP_HOST_COMPAT=1
Environment=PATH=/usr/libexec/docker:/usr/bin:/usr/sbin
ExecStart=/usr/bin/dockerd-current           --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current           --default-runtime=docker-runc           --exec-opt native.cgroupdriver=systemd           --userland-proxy-path=/usr/libexec/docker/docker-proxy-current           $OPTIONS           $DOCKER_STORAGE_OPTIONS           $DOCKER_NETWORK_OPTIONS           $ADD_REGISTRY           $BLOCK_REGISTRY           $INSECURE_REGISTRY      $REGISTRIES
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=1048576
LimitNPROC=1048576
LimitCORE=infinity
TimeoutStartSec=0
Restart=on-abnormal
MountFlags=slave
KillMode=process

[Install]
WantedBy=multi-user.target

[Service]
...
ExecStart=/usr/bin/dockerd 
--storage-driver devicemapper --storage-opt dm.loopdatasize=100G --storage-opt dm.loopmetadatasize=10G --storage-opt dm.fs=ext4 --storage-opt dm.basesize=30G
...

DOCKER最大空间为100G，容器最大空间为30G

systemctl daemon-reload

重启 docker
service docker restart

/etc/sysconfig/docker-storage
# cat /etc/sysconfig/docker-storage |grep -v ^$ | grep -v ^# 

DOCKER_STORAGE_OPTIONS=

# cat /etc/sysconfig/docker-storage

DOCKER_STORAGE_OPTIONS="--storage-opt dm.loopdatasize=100G -storage-opt dm.loopmetadatasize=10G --storage-opt dm.fs=ext4 --storage-opt dm.basesize=20G"

参数：
dm.loopdatasize=2000G 　　# 是指存放数据的数据库空间为100G，默认是20g
dm.loopmetadatasize=10G 　　# 是存放Metadata数据空间为10g，默认是2g
dm.fs=ext4 　　# 是指容器磁盘分区为ext4
dm.basesize=20G　　# 是指容器根分区默认为20g，默认是10g

新版本dm字段：
DOCKER_STORAGE_OPTIONS="--storage-driver devicemapper --storage-opt dm.loopdatasize=2000G --storage-opt dm.loopmetadatasize=10G --storage-opt dm.fs=ext4 --storage-opt dm.basesize=20G"