liunx下安装Docker
1、安装并启动docker
1、检查内核版本，必须是3.10及以上
uname -r
2、安装docker
yum install docker命令安装(需要联网)
1 [root@localhost ~]# yum install docker 2 Loaded plugins: fastestmirror 3 base | 3.6 kB 00:00:00 4 extras | 3.4 kB 00:00:00 5 updates | 3.4 kB 00:00:00 6 (1/4): extras/7/x86_64/primary_db | 156 kB 00:00:00 7 (2/4): updates/7/x86_64/primary_db | 1.3 MB 00:00:00 8 (3/4): base/7/x86_64/group_gz | 166 kB 00:00:00 9 (4/4): base/7/x86_64/primary_db | 6.0 MB 00:00:01 10 Determining fastest mirrors 11 * base: centos.ustc.edu.cn 12 * extras: mirrors.163.com 13 * updates: centos.ustc.edu.cn 14 Resolving Dependencies 15 --> Running transaction check 16 ---> Package docker.x86_64 2:1.13.1-88.git07f3374.el7.centos will be installed 17 --> Processing Dependency: docker-common = 2:1.13.1-88.git07f3374.el7.centos for package: 2:docker-1.13.1-88.git07f3374.el7.centos.x86_64 18 --> Processing Dependency: docker-client = 2:1.13.1-88.git07f3374.el7.centos for package: 2:docker-1.13.1-88.git07f3374.el7.centos.x86_64 19 ... 20 Install 1 Package (+27 Dependent packages) 21 Upgrade 1 Package (+15 Dependent packages) 22 23 Total download size: 41 M 24 25 询问是否下载安装，输入y 26 Is this ok [y/d/N]: y 27 进入下载安装过程... 28 Downloading packages: 29 Delta RPMs disabled because /usr/bin/applydeltarpm not installed. 30 warning: /var/cache/yum/x86_64/7/extras/packages/atomic-registries-1.22.1-26.gitb507039.el7.centos.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEYs | 0 B --:--:-- ETA 31 Public key for atomic-registries-1.22.1-26.gitb507039.el7.centos.x86_64.rpm is not installed 32 (1/44): atomic-registries-1.22.1-26.gitb507039.el7.centos.x86_64.rpm | 35 kB 00:00:00 33 Public key for PyYAML-3.10-11.el7.x86_64.rpm is not installed 34 (2/44): PyYAML-3.10-11.el7.x86_64.rpm | 153 kB 00:00:00 35 (3/44): audit-2.8.4-4.el7.x86_64.rpm | 250 kB 00:00:00 36 ... 37 (44/44): systemd-sysv-219-62.el7.x86_64.rpm | 83 kB 00:00:01 38 ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 39 Total 40 安装完成后可能出现下面内容(大致是从文件中检索秘钥，询问是否导入秘钥)，输入y即可 41 Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 42 Importing GPG key 0xF4A80EB5: 43 Userid : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>" 44 Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5 45 Package : centos-release-7-2.1511.el7.centos.2.10.x86_64 (@anaconda) 46 From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7 47 Is this ok [y/N]: y
3、输入y确认安装
4、启动docker
启动docker
1 [root@localhost ~]# systemctl start docker
查看docker版本 2 [root@localhost ~]# docker -v
Docker version 1.12.6, build 3e8e77d/1.12.6
2.可能出现的错误
错误1：
启动时提示报错
Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.
根据提示查看 systemctl status docker.service，看到错误信息如下
Error starting daemon: SELinux is not supported with the overlay2 graph driver on this kernel. Either boot into a ne...led=false)
1 [root@localhost ~]# systemctl start docker 2 Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details. 3 [root@localhost ~]# systemctl status docker.service 4 ● docker.service - Docker Application Container Engine 5 Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled) 6 Active: failed (Result: exit-code) since Sat 2018-12-29 02:40:04 EST; 2min 11s ago 7 Docs: http://docs.docker.com 8 Process: 4936 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 --init-path=/usr/libexec/docker/docker-init-current --seccomp-profile=/etc/docker/seccomp.json $OPTIONS $DOCKER_STORAGE_OPTIONS $DOCKER_NETWORK_OPTIONS $ADD_REGISTRY $BLOCK_REGISTRY $INSECURE_REGISTRY $REGISTRIES (code=exited, status=1/FAILURE) 9 Main PID: 4936 (code=exited, status=1/FAILURE) 10 CGroup: /system.slice/docker.service 11 12 Dec 29 02:40:02 localhost.localdomain systemd[1]: Starting Docker Application Container Engine... 13 Dec 29 02:40:02 localhost.localdomain dockerd-current[4936]: time="2018-12-29T02:40:02.948680364-05:00" level=warning msg="could not change group /var/run/docker.sock to docker:...not found" 14 Dec 29 02:40:02 localhost.localdomain dockerd-current[4936]: time="2018-12-29T02:40:02.956633687-05:00" level=info msg="libcontainerd: new containerd process, pid: 4940" 15 Dec 29 02:40:03 localhost.localdomain dockerd-current[4936]: time="2018-12-29T02:40:03.969576324-05:00" level=warning msg="overlay2: the backing xfs filesystem is formatted without d_type... 16 Dec 29 02:40:04 localhost.localdomain dockerd-current[4936]: Error starting daemon: SELinux is not supported with the overlay2 graph driver on this kernel. Either boot into a ne...led=false) 17 Dec 29 02:40:04 localhost.localdomain systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE 18 Dec 29 02:40:04 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine. 19 Dec 29 02:40:04 localhost.localdomain systemd[1]: Unit docker.service entered failed state. 20 Dec 29 02:40:04 localhost.localdomain systemd[1]: docker.service failed. 21 Hint: Some lines were ellipsized, use -l to show in full.
在上面报错中可以看到启动出错的原因
Error starting daemon: SELinux is not supported with the overlay2 graph driver on this kernel. Either boot into a ne...led=false)
解决方案
重新编辑/etc/sysconfig/docker(docker配置文件)
1 [root@localhost ~]# vi /etc/sysconfig/docker 2 # /etc/sysconfig/docker 3 4 # Modify these options if you want to change the way the docker daemon runs 5 OPTIONS='--selinux-enabled --log-driver=journald --signature-verification=false' 6 if [ -z "${DOCKER_CERT_PATH}" ]; then 7 DOCKER_CERT_PATH=/etc/docker 8 fi 9 10 # Do not add registries in this file anymore. Use /etc/containers/registries.conf 11 # instead. For more information reference the registries.conf(5) man page. 12 13 # Location used for temporary files, such as those created by 14 # docker load and build operations. Default is /var/lib/docker/tmp 15 # Can be overriden by setting the following environment variable. 16 # DOCKER_TMPDIR=/var/tmp 17 18 # Controls the /etc/cron.daily/docker-logrotate cron job status. 19 # To disable, uncomment the line below. 20 21 将上面的 22 OPTIONS='--selinux-enabled --log-driver=journald --signature-verification=false' 23 修改为 24 OPTIONS='--selinux-enabled=false --log-driver=journald --signature-verification=false'
然后退出vi编辑(按Esc键，输入:wq，按Enter)
输入systemctl restart docker命令重启docker服务
