在CentOS 7中安裝Docker
1-確認系統信息
# cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)
# uname -a
Linux CentOS-7 3.10.0-327.el7.x86_64 #1 SMP Thu Nov 19 22:10:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux2-安裝docker
# yum -y install docker
3-關閉SELinux和啟動docker服務
關閉SELinux
- 永久方法：修改/etc/selinux/config文件中設置SELINUX=disabled ，然后重啟。
- 臨時方法：執行
setenforce 0命令設置SELinux成為permissive模式
sudo systemctl status firewalld.service
sudo systemctl stop firewalld.service
sudo systemctl disable firewalld.service啟動docker服務[root@CentOS-7 ~]# systemctl start docker.service
設置自啟動docker服務
[root@CentOS-7 ~]# systemctl enable docker.service
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[root@CentOS-7 ~]# systemctl is-enabled docker.service
enabled
[root@CentOS-7 ~]# 4-設置docker代理
# vim /etc/sysconfig/docker
根據實際需要添加相應內容
HTTP_PROXY=http://10.144.1.10:8080
#HTTPS_PROXY=https://10.144.1.10:8080
#FTP_PROXY=ftp://10.144.1.10:8080注意：一般情況下，國內鏡像設置或代理設置，只需要完成一種配置就可以了。
5-重啟docker
# systemctl daemon-reload# systemctl restart docker
6-安裝驗證
運行官方鏡像hello-world文件
# docker run hello-world
Unable to find image 'hello-world:latest' locally
Trying to pull repository docker.io/library/hello-world ...
latest: Pulling from docker.io/library/hello-world
c04b14da8d14: Pull complete
Digest: sha256:0256e8a36e2070f7bf2d0b0763dbabdd67798512411de4cdcf9431a1feb60fd9
Status: Downloaded newer image for docker.io/hello-world:latestHello from Docker!
This message shows that your installation appears to be working correctly.To generate this message, Docker took the following steps:1. The Docker client contacted the Docker daemon.2. The Docker daemon pulled the "hello-world" image from the Docker Hub.3. The Docker daemon created a new container from that image which runs theexecutable that produces the output you are currently reading.4. The Docker daemon streamed that output to the Docker client, which sent itto your terminal.To try something more ambitious, you can run an Ubuntu container with:$ docker run -it ubuntu bashShare images, automate workflows, and more with a free Docker Hub account:https://hub.docker.comFor more examples and ideas, visit:https://docs.docker.com/engine/userguide/#
# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/hello-world latest c54a2cc56cbb 5 months ago 1.848 kB另外一種Docker代理設置方法
修改docker.service文件# vim /usr/lib/systemd/system/docker.service
在[Service]部分添加如下內容
Environment="HTTP_PROXY=http://10.144.1.10:8080"
Environment="HTTPS_PROXY=https://10.144.1.10:8080"
Environment="FTP_PROXY=ftp://10.144.1.10:8080"
或者，另外創建代理文件
# mkdir /etc/systemd/system/docker.service.d
# touch /etc/systemd/system/docker.service.d/proxy.conf
# vim /etc/systemd/system/docker.service.d/proxy.conf增加以下內容
[Service]
Environment="HTTP_PROXY=http://10.144.1.10:8080"
Environment="HTTPS_PROXY=https://10.144.1.10:8080"
Environment="FTP_PROXY=ftp://10.144.1.10:8080"
重啟docker# systemctl daemon-reload# systemctl restart docker
檢查docker環境變量是否加載
# systemctl show docker --property Environment
Environment=GOTRACEBACK=crash HTTP_PROXY=http://10.144.1.10:8080 HTTPS_PROXY=https://10.144.1.10:8080 FTP_PROXY=ftp://10.144.1.10:8080示例 - 在CentOS7系統安裝docker并運行鏡像（使用國內鏡像）
[root@CentOS7 ~]# route add default gw 10.0.3.2
[root@CentOS7 ~]#
[root@CentOS7 ~]# yum -y install docker[root@CentOS7 ~]# vim /etc/selinux/config
[root@CentOS7 ~]# cat /etc/selinux/config |grep "SELINUX="
# SELINUX= can take one of these three values:
SELINUX=disabled
[root@CentOS7 ~]#
[root@CentOS7 ~]# setenforce 0
[root@CentOS7 ~]#
[root@CentOS7 ~]# systemctl start docker.service
[root@CentOS7 ~]# systemctl enable docker.service
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[root@CentOS7 ~]# systemctl is-enabled docker.service
enabled
[root@CentOS7 ~]#
[root@CentOS7 ~]# sudo mkdir -p /etc/docker
[root@CentOS7 ~]# sudo tee /etc/docker/daemon.json <<-'EOF'
> {
> "registry-mirrors": ["https://t5t8q6wn.mirror.aliyuncs.com"]
> }
> EOF
{"registry-mirrors": ["https://t5t8q6wn.mirror.aliyuncs.com"]
}
[root@CentOS7 ~]# systemctl daemon-reload
[root@CentOS7 ~]# systemctl restart docker
[root@CentOS7 ~]#
[root@CentOS7 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
[root@CentOS7 ~]#
[root@CentOS7 ~]# docker run hello-world
Unable to find image 'hello-world:latest' locally
Trying to pull repository docker.io/library/hello-world ...
latest: Pulling from docker.io/library/hello-world
78445dd45222: Pull complete
Digest: sha256:c5515758d4c5e1e838e9cd307f6c6a0d620b5e07e6f927b07d05f6d12a1ac8d7Hello from Docker!
This message shows that your installation appears to be working correctly.To generate this message, Docker took the following steps:1. The Docker client contacted the Docker daemon.2. The Docker daemon pulled the "hello-world" image from the Docker Hub.3. The Docker daemon created a new container from that image which runs theexecutable that produces the output you are currently reading.4. The Docker daemon streamed that output to the Docker client, which sent itto your terminal.To try something more ambitious, you can run an Ubuntu container with:$ docker run -it ubuntu bashShare images, automate workflows, and more with a free Docker ID:https://cloud.docker.com/For more examples and ideas, visit:https://docs.docker.com/engine/userguide/[root@CentOS7 ~]#
[root@CentOS7 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
docker.io/hello-world latest 48b5124b2768 3 months ago 1.84 kB
[root@CentOS7 ~]# )
問題)
