container（容器）
docker（集装箱）
容器的优点
1、 启动速度快
2、 节省资源
3、 兼容性高
保证机器正常上网
#ping www.baidu.com
CPU需要支持虚拟化
# grep -E 'svm|vmx' /proc/cpuinfo
找到flags部分，如果其中输出有SVM或VMX，表明CPU支持虚拟化技术：
==》 svm - Secure virtual machine, AMD的虚拟化技术AMD-V
==》 vmx - Intel的虚拟化技术Intel-VT
[root@localhost ~]# grep -E 'svm|vmx' /proc/cpuinfo
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf eagerfpu pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch tpr_shadow vnmi ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid rdseed adx smap xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf eagerfpu pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch tpr_shadow vnmi ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid rdseed adx smap xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp
安装 yum-utils，它提供了 yum-config-manager，可用来管理yum源
# yum install yum-utils -y
添加docker网络yum源docker-ce.repo
# yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
配置网络yum源
http://mirrors.163.com/.help/centos.html
使用wget下载163的源
#wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
重新创建缓存文件
三个随便选一个执行即可
# yum makecache
#yum makecache fast
# yum clean all
注意：添加完网络yum源后，执行以下命令
#rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
安装docker
# yum install docker-ce
报错信息
Total 4.9 MB/s | MB ::
Retrieving key from http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
Importing GPG key 0xC105B9DE:
Userid : "CentOS-6 Key (CentOS 6 Official Signing Key) <centos-6-key@centos.org>"
Fingerprint: c1da c52d e8a4 386d ba43 fca2 c105 b9de
From : http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
Is this ok [y/N]: y Public key for libcgroup-0.41-.el7.x86_64.rpm is not installed Failing package is: libcgroup-0.41-.el7.x86_64
GPG Keys are configured as: http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6
解决办法
#rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
再次安装
# yum install docker-ce
确认docker服务的安装
# yum list installed | grep docker
[root@localhost ~]# yum list installed | grep docker
docker.x86_64 :1.13.-.gitb2f74b2.el7.centos @extrs
docker-client.x86_64 :1.13.-.gitb2f74b2.el7.centos @extrs
docker-common.x86_64 :1.13.-.gitb2f74b2.el7.centos @extrs
开启docker并查看版本
# systemctl start docker
# docker version
docker安装完成
附上安装源
163的源
centos-base.repo
[base]
name=CentOS-$releasever - Base - .com
baseurl=http://mirrors.163.com/centos/7/os/x86_64/
gpgcheck= [updates]
name=CentOS-$releasever - Updates - .com
baseurl=http://mirrors.163.com/centos/7/updates/x86_64/
gpgcheck= [extras]
name=CentOS-$releasever - Extras - .com
baseurl=http://mirrors.163.com/centos/7/extras/x86_64/
gpgcheck=
docker-ce.repo
[docker-ce-stable]
name=Docker CE Stable - $basearch
baseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/7/$basearch/stable
enabled=
gpgcheck=
#gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg
参考博客
centos7上安装docker
https://www.cnblogs.com/yufeng218/p/8370670.html
https://blog.csdn.net/xixiworld/article/details/71438794
CentOS7 配置网络和yum源
https://blog.csdn.net/weixin_41782053/article/details/80524515
centos7下yum安装docker报找不到可用包docker
https://blog.csdn.net/qq751470431/article/details/77771786