无法在RHEL 8上安装docker

Question

我正准备在rhel 8上安装docker。

我得到了下面的错误，不确定为什么请帮助。

[root@mano mano]# yum install docker-ce-18.09.9
Cannot find a valid baseurl for repo: InstallMedia, ignoring this repo.
Last metadata expiration check: 0:11:14 ago on Fri 20 Sep 2019 02:42:53 PM IST.
Error: 
 Problem: package docker-ce-3:18.09.9-3.el7.x86_64 requires containerd.io >= 1.2.2-3, but none of the providers can be installed
  - cannot install the best candidate for the job
  - package containerd.io-1.2.2-3.3.el7.x86_64 is excluded
  - package containerd.io-1.2.2-3.el7.x86_64 is excluded
  - package containerd.io-1.2.4-3.1.el7.x86_64 is excluded
  - package containerd.io-1.2.5-3.1.el7.x86_64 is excluded
  - package containerd.io-1.2.6-3.2.el7.x86_64 is excluded
  - package containerd.io-1.2.6-3.3.el7.x86_64 is excluded
(try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)

我已经安装了containered.io

Answer 1

出于某种原因，RHEL已经屏蔽了Containerd。

你必须通过运行下面的命令行来手动安装；

yum -y install https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm

在此之后，yum install docker-ce应该可以正常工作。

请注意，您还必须禁用firewalld，否则DNS将中断。

为此，您可以运行：

systemctl disable firewalld

Answer 2

对于Rhel 8，请尝试以下步骤：

首先，安装DNF：

yum install DNF

dnf install -y dnf-utils \
  device-mapper-persistent-data \
  lvm2
dnf config-manager \ 
  --add-repo \
  https://download.docker.com/linux/centos/docker-ce.repo
dnf install docker-ce
systemctl start docker
systemctl enable docker

安装时，如果系统提示您接受GPG密钥，请输入y接受相同的GPG密钥