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场景

在日常的软件部署中，不知道小伙伴们会不会遇到如下情况：

客户的服务器处于内网环境，没有与互联网环联通。

所以不能使用yum在线软件源安装，那么能不能先将所需的软件下载下来，到时候在内网环境下再离线安装呢？答案是肯定的。关于这个功能yum需要一个插件(yum-plugin-downloadonly)的支持。

安装插件

yum install -y yum-plugin-downloadonly

yum离线下载软件包

下载的时候需要使用"- -downloadonly"参数，用于指定软件包下载后存储路径，该参数不会安装软件。

yum install -y --downloadonly --downloaddir=. docker

[root@localhost docker]# lsatomic-registries-1.22.1-26.gitb507039.el7.centos.x86_64.rpmaudit-2.8.4-4.el7.x86_64.rpmaudit-libs-2.8.4-4.el7.x86_64.rpmaudit-libs-python-2.8.4-4.el7.x86_64.rpmcheckpolicy-2.5-8.el7.x86_64.rpmcontainers-common-0.1.31-8.gitb0b750d.el7.centos.x86_64.rpmcontainer-selinux-2.74-1.el7.noarch.rpmcontainer-storage-setup-0.11.0-2.git5eaf76c.el7.noarch.rpmdocker-1.13.1-91.git07f3374.el7.centos.x86_64.rpmdocker-client-1.13.1-91.git07f3374.el7.centos.x86_64.rpmdocker-common-1.13.1-91.git07f3374.el7.centos.x86_64.rpmlibcgroup-0.41-20.el7.x86_64.rpmlibselinux-2.5-14.1.el7.x86_64.rpmlibselinux-python-2.5-14.1.el7.x86_64.rpmlibselinux-utils-2.5-14.1.el7.x86_64.rpmlibsemanage-2.5-14.el7.x86_64.rpmlibsemanage-python-2.5-14.el7.x86_64.rpmlibsepol-2.5-10.el7.x86_64.rpmlibyaml-0.1.4-11.el7_0.x86_64.rpmoci-register-machine-0-6.git2b44233.el7.x86_64.rpmoci-systemd-hook-0.1.18-3.git8787307.el7_6.x86_64.rpmoci-umount-2.3.4-2.git87f9237.el7.x86_64.rpmpolicycoreutils-2.5-29.el7_6.1.x86_64.rpmpolicycoreutils-python-2.5-29.el7_6.1.x86_64.rpmpython-backports-1.0-8.el7.x86_64.rpmpython-backports-ssl_match_hostname-3.5.0.1-1.el7.noarch.rpmpython-ipaddress-1.0.16-2.el7.noarch.rpmpython-IPy-0.75-6.el7.noarch.rpmpython-pytoml-0.1.14-1.git7dea353.el7.noarch.rpmpython-setuptools-0.9.8-7.el7.noarch.rpmPyYAML-3.10-11.el7.x86_64.rpmselinux-policy-3.13.1-229.el7_6.9.noarch.rpmselinux-policy-targeted-3.13.1-229.el7_6.9.noarch.rpmsetools-libs-3.3.8-4.el7.x86_64.rpmsubscription-manager-rhsm-certificates-1.21.10-3.el7.centos.x86_64.rpmyajl-2.0.4-4.el7.x86_64.rpm

yum离线安装软件包

下载好后的软件包，使用yum localinstall 即可以离线安装。

[root@localhost docker]# yum localinstall -y --nogpgcheck \atomic-registries-1.22.1-26.gitb507039.el7.centos.x86_64.rpm \audit-2.8.4-4.el7.x86_64.rpm \audit-libs-2.8.4-4.el7.x86_64.rpm \audit-libs-python-2.8.4-4.el7.x86_64.rpm \checkpolicy-2.5-8.el7.x86_64.rpm \containers-common-0.1.31-8.gitb0b750d.el7.centos.x86_64.rpm \container-selinux-2.74-1.el7.noarch.rpm \container-storage-setup-0.11.0-2.git5eaf76c.el7.noarch.rpm \docker-1.13.1-91.git07f3374.el7.centos.x86_64.rpm \docker-client-1.13.1-91.git07f3374.el7.centos.x86_64.rpm \docker-common-1.13.1-91.git07f3374.el7.centos.x86_64.rpm \libcgroup-0.41-20.el7.x86_64.rpm \libselinux-2.5-14.1.el7.x86_64.rpm \libselinux-python-2.5-14.1.el7.x86_64.rpm \libselinux-utils-2.5-14.1.el7.x86_64.rpm \libsemanage-2.5-14.el7.x86_64.rpm \libsemanage-python-2.5-14.el7.x86_64.rpm \libsepol-2.5-10.el7.x86_64.rpm \libyaml-0.1.4-11.el7_0.x86_64.rpm \oci-register-machine-0-6.git2b44233.el7.x86_64.rpm \oci-systemd-hook-0.1.18-3.git8787307.el7_6.x86_64.rpm \oci-umount-2.3.4-2.git87f9237.el7.x86_64.rpm \policycoreutils-2.5-29.el7_6.1.x86_64.rpm \policycoreutils-python-2.5-29.el7_6.1.x86_64.rpm \python-backports-1.0-8.el7.x86_64.rpm \python-backports-ssl_match_hostname-3.5.0.1-1.el7.noarch.rpm \python-ipaddress-1.0.16-2.el7.noarch.rpm \python-IPy-0.75-6.el7.noarch.rpm \python-pytoml-0.1.14-1.git7dea353.el7.noarch.rpm \python-setuptools-0.9.8-7.el7.noarch.rpm \PyYAML-3.10-11.el7.x86_64.rpm \selinux-policy-3.13.1-229.el7_6.9.noarch.rpm \selinux-policy-targeted-3.13.1-229.el7_6.9.noarch.rpm \setools-libs-3.3.8-4.el7.x86_64.rpm \subscription-manager-rhsm-certificates-1.21.10-3.el7.centos.x86_64.rpm \yajl-2.0.4-4.el7.x86_64.rpm

注意事项：

1. yum localinstall 后面要指定安装所需的全部rpm包
2. 除了yum localinstall命令以外，还可以使用rpm -ivh命令安装rpm包。
   

验证安装结果

[root@localhost docker]# systemctl  start docker [root@localhost docker]# docker ps CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

docker 安装成功

参考资料

https://www.yanning.wang/archives/664.html

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