Docker存储引擎
阿里镜像下载地址:mirrors.aliyun.com/docker-ce/l…
查看系统版本（推荐一定要使用7.5以上版本、否则会出现后续问题）
7 ~]# cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)
7 ~]# cd /usr/local/src/
src]# wget https://mirrors.aliyun.com/docker-ce/linux/centos/7/x86_64/stable/Packages/docker-ce-19.03.9-3.el7.x86_64.rpm
src]# wget https://mirrors.aliyun.com/docker-ce/linux/centos/7/x86_64/stable/Packages/docker-ce-cli-19.03.9-3.el7.x86_64.rpm
CentOS 7（使用 yum 进行安装）
Docker CE镜像 配置方法：developer.aliyun.com/mirror/dock…
# step 1: 安装必要的一些系统工具
sudo yum install -y yum-utils device-mapper-persistent-data lvm2
# Step 2: 添加软件源信息
sudo yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# Step 3
sudo sed -i 's+download.docker.com+mirrors.aliyun.com/docker-ce+' /etc/yum.repos.d/docker-ce.repo
# Step 4: 更新并安装Docker-CE
sudo yum makecache fast
需要和安装包在同一目录下
src]# yum localinstall docker-ce* -y
启动docker
src]# systemctl start docker
[root@centos7 src]# docker info
Client:
Debug Mode: false
Server:
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 0
Server Version: 19.03.9
Storage Driver: devicemapper <--存储驱动程序
Pool Name: docker-253:0-402813732-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: /var/lib/docker/devicemapper/devicemapper/data
Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
Data Space Used: 11.8MB
Data Space Total: 107.4GB #总空间107G、如果空间用完了就再也写不进去数据了
Data Space Available: 102.9GB
Metadata Space Used: 581.6kB
Metadata Space Total: 2.147GB
Metadata Space Available: 2.147GB
Thin Pool Minimum Free Space: 10.74GB
Deferred Removal Enabled: true
Deferred Deletion Enabled: true
Deferred Deleted Device Count: 0
Library Version: 1.02.170-RHEL7 (2020-03-24)
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host ipvlan 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: 78f51771157abb6c9ed224c22013cdf09962315d
runc version: v1.1.4-0-g5fd4c4d
init version: fec3683
Security Options:
seccomp
Profile: default
Kernel Version: 3.10.0-327.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 2.766GiB
Name: centos7.2
ID: OOJO:7KD5:VV7Z:LT3O:2L66:H2C4:PKIX:AUJ2:XK3A:ZR4G:WKS4:C2P5
Docker Root Dir: /var/lib/docker
Debug Mode: false
Registry: https://index.docker.io/v1/
Labels:
Experimental: false
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: false
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
#警告：devicemapper存储驱动程序已弃用，将在将来的版本中删除。
WARNING: the devicemapper storage-driver is deprecated, and will be removed in a future release.
#警告：devicemapper：强烈建议在生产中使用环回设备。
WARNING: devicemapper: usage of loopback devices is strongly discouraged for production use.
#使用`--storage opt-dm。thinpooldev”指定自定义块存储设备。
Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
下载nginx镜像
~]# docker pull nginx
~]# docker run -d -it -p 80:80 nginx
#容器
~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
135c15a010f0 nginx "/docker-entrypoint.…" 10 seconds ago Up 7 seconds 0.0.0.0:80->80/tcp agitated_wiles
#镜像
~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 3964ce7b8458 4 days ago 142MB
修改存储驱动程序类型
一定要提前备份数据！！！否则数据会全丢！！！[无论是镜像'docker images'、还是容器'docker ps -a']
src]# vim /lib/systemd/system/docker.service
...
[Service]
#添加 -s=overlay2
ExecStart=/usr/bin/dockerd -s=overlay2 -H fd:// --containerd=/run/containerd/containerd.sock
...
src]# systemctl daemon-reload
#重启docker
src]# systemctl restart docker
解决办法
关机新添加1块500G的硬盘
查看是否有500G硬盘了
~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 100G 0 disk
├─sda1 8:1 0 512M 0 part /boot
└─sda2 8:2 0 99.5G 0 part
├─centos-root 253:0 0 97.5G 0 lvm /
└─centos-swap 253:1 0 2G 0 lvm [SWAP]
sdb 8:16 0 500G 0 disk <--
sr0 11:0 1 603M 0 rom
开启 ftype=1
挂载到docker
~]# mount /dev/sdb /var/lib/docker/
重启docker
~]# systemctl daemon-reload
~]# systemctl start docker
就会变成overlay2
~]# docker info
...
Storage Driver: overlay2 <--存储驱动程序
...
镜像加速
- 安装/升级Docker客户端
推荐安装1.10.0以上版本的Docker客户端，参考 docker-ce
- 配置镜像加速器
针对Docker客户端版本大于 1.10.0 的用户
#针对Ubuntu/Linux操作系统
~# sudo mkdir -p /etc/docker
~# cat /etc/docker/daemon.json
{
"registry-mirrors": ["https://9916w1ow.mirror.aliyuncs.com"]
}
~# sudo systemctl daemon-reload
~# sudo systemctl restart docker
