centos7 docker 存储使用 overlay，添加标签
docker 存储使用overlay
1、requirement 必须升级到7.2
centos 7.2
2、升级centos，安装docker
2.1 系统升级
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1
2
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sudo
yum upgrade --assumeyes --tolerant
sudo
yum update --assumeyes
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2.2 确认内核
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2
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uname
-r
3.10.0-327.10.1.el7.x86_64
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2.3 启用overlay
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2
3
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$
sudo
tee
/etc/modules-load
.d
/overlay
.conf <<-
'EOF'
overlay
EOF
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2.4 重启系统
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1
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reboot
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2.5 确认 overlay启用
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2
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$ lsmod |
grep
overlay
overlay
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2.6 配置docker repo
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2
3
4
5
6
7
8
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$
sudo
tee
/etc/yum
.repos.d
/docker
.repo <<-
'EOF'
[dockerrepo]
name=Docker Repository
baseurl=https:
//yum
.dockerproject.org
/repo/main/centos/
$releasever/
enabled=1
gpgcheck=1
gpgkey=https:
//yum
.dockerproject.org
/gpg
EOF
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2.7 配置docker 使用overlay
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5
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$
sudo
mkdir
-p
/etc/systemd/system/docker
.service.d &&
sudo
tee
/etc/systemd/system/docker
.service.d
/override
.conf <<- EOF
[Service]
ExecStart=
ExecStart=
/usr/bin/docker
daemon --storage-driver=overlay -H fd:
//
EOF
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2.8 安装docker engine,daemon和service
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2
3
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sudo
yum
install
--assumeyes --tolerant docker-engine-1.9.1 docker-engine-selinux-1.9.1
sudo
systemctl start docker
sudo
systemctl
enable
docker
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2.9 daemon修改，添加监听端口和label
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1
2
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vi
/etc/systemd/system/docker
.service.d
/override
.conf
/usr/bin/docker
daemon --storage-driver=overlay -H unix:
///var/run/docker
.sock -H 0.0.0.0:2375 --label environment=
"production"
--label service=
"自己定义"
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3 给daemon添加标签
3.1因为从centos7 开始，安装的docker-engine 没有 /etc/sysconfig/docker
手动创建个
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2
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vi
/etc/sysconfig/docker
OPTIONS=
"--storage-driver=overlay -H unix:///var/run/docker.sock -H 0.0.0.0:2375 --label environment=production --label role=proxy --label service=none"
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3.2修改docker.service,添加配置文件路径和 $OPTIONS
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cd
/etc/systemd/system/multi-user
.target.wants
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15
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[Unit]
Description=Docker Application Container Engine
Documentation=https:
//docs
.docker.com
After=network.target docker.socket
Requires=docker.socket
[Service]
Type=notify
EnvironmentFile=
/etc/sysconfig/docker
ExecStart=
/usr/bin/docker
daemon $OPTIONS -H fd:
//
MountFlags=slave
LimitNOFILE=1048576
LimitNPROC=1048576
LimitCORE=infinity
[Install]
WantedBy=multi-user.target
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3.3 因为override.conf 优先级较高，会覆盖docker.service配置，把override.conf 去掉
ps:可以考虑用tls通信，把2375换成2376，来避免因为监听端口，导致的提权漏洞
本文转自银狐博客51CTO博客，原文链接http://blog.51cto.com/foxhound/1773879如需转载请自行联系原作者
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