【Linux】CentOS8.4 安装docker

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一、环境配置

• 操作系统：CentOS Linux release 8.4.2105
• Docker Version: 24.0.6

# 更新镜像源, Centos8 由yum 升级为dnf两个都可使用，yum源需可用
# 安装NTP 
dnf install chrony

# 修改chrony配置文件指定NTP源为阿里NTP
sed -r -i 's?^pool.+iburst?pool ntp.aliyun.com iburst?' /etc/chrony.conf
# 重启chrony服务
systemctl restart chronyd
# 开机自动启动chrony服务
systemctl enable chronyd
# 查看时间服务器状态
chronyc sources -v

# 创建docker目录
mkdir -p /etc/docker /opt/docker
# 创建docker配置文件
tee /etc/docker/daemon.json <<-'EOF'
{
    "data-root": "/opt/docker",
    "log-driver": "json-file",
    "log-opts": {
        "max-size": "800m",
        "max-file": "50"
    },
    "registry-mirrors": [
        "https://b9pmyelo.mirror.aliyuncs.com"
    ]
}
EOF

相关文章：

【Linux】NTP时间服务器Chrony配置详解_开着拖拉机回家的博客-CSDN博客

【容器化】Docker-compose教程（安装，使用， 快速入门）_docker-compose安装-CSDN博客

二、安装Docker

# 安装镜像源配置工具
dnf install -y yum-utils
# 添加软件源
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# 安装docker
# 离线安装用户可以在这里执行dnf download --resolve docker-ce docker-ce-cli containerd.io下载所有包
dnf install docker-ce docker-ce-cli containerd.io
# 启动docker
systemctl start docker
# docker开机自动启动
systemctl enable docker
# containerd容器开机自动启动
systemctl enable containerd
# 查看docker版本信息
docker info

成功启动

三、错误解决

3.1 报错---yum 源配置

3.1.1 报错信息

执行 yum 安装报错如下：

Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist

原因：Centos8于2021年年底停止了服务，我们在使用yum源安装时候，出现下面错误“错误：Failed to download metadata for repo ‘AppStream’: Cannot prepare internal mirrorlist: No URLs in mirrorlist”。

3.1.2 解决

进入yum的repos目录

cd /etc/yum.repos.d/

修改所有的CentOS文件内容，最好是全部备份后再修改

sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*

yum 可以正常使用

3.2 报错---podman和buildah

3.2.1 报错信息

安装 docker 报错信息如下：

[root@tdh-node01 yum.repos.d]# dnf install docker-ce docker-ce-cli containerd.io
Last metadata expiration check: 0:01:45 ago on Tue 24 Oct 2023 10:50:35 AM CST.
Error:
 Problem 1: problem with installed package podman-3.0.1-6.module_el8.4.0+781+acf4c33b.x86_64
  - package podman-3.0.1-6.module_el8.4.0+781+acf4c33b.x86_64 requires runc >= 1.0.0-57, but none of the providers can be installed
  - package podman-3.3.1-9.module_el8.5.0+988+b1f0b741.x86_64 requires runc >= 1.0.0-57, but none of the providers can be installed
  - package containerd.io-1.6.24-3.1.el8.x86_64 conflicts with runc provided by runc-1.0.0-70.rc92.module_el8.4.0+673+eabfc99d.x86_64
  - package containerd.io-1.6.24-3.1.el8.x86_64 obsoletes runc provided by runc-1.0.0-70.rc92.module_el8.4.0+673+eabfc99d.x86_64
  - package containerd.io-1.6.24-3.1.el8.x86_64 conflicts with runc provided by runc-1.0.2-1.module_el8.5.0+911+f19012f9.x86_64
  - package containerd.io-1.6.24-3.1.el8.x86_64 obsoletes runc provided by runc-1.0.2-1.module_el8.5.0+911+f19012f9.x86_64
  - cannot install the best candidate for the job
  - package runc-1.0.0-66.rc10.module_el8.5.0+1004+c00a74f5.x86_64 is filtered out by modular filtering
  - package runc-1.0.0-72.rc92.module_el8.5.0+1006+8d0e68a2.x86_64 is filtered out by modular filtering
 Problem 2: problem with installed package buildah-1.19.7-1.module_el8.4.0+781+acf4c33b.x86_64
  - package buildah-1.19.7-1.module_el8.4.0+781+acf4c33b.x86_64 requires runc >= 1.0.0-26, but none of the providers can be installed
  - package buildah-1.22.3-2.module_el8.5.0+911+f19012f9.x86_64 requires runc >= 1.0.0-26, but none of the providers can be installed
  - package docker-ce-3:24.0.6-1.el8.x86_64 requires containerd.io >= 1.6.4, but none of the providers can be installed
  - package containerd.io-1.6.10-3.1.el8.x86_64 conflicts with runc provided by runc-1.0.2-1.module_el8.5.0+911+f19012f9.x86_64
  - package containerd.io-1.6.10-3.1.el8.x86_64 obsoletes runc provided by runc-1.0.2-1.module_el8.5.0+911+f19012f9.x86_64
  - package containerd.io-1.6.11-3.1.el8.x86_64 conflicts with runc provided by runc-1.0.2-1.module_el8.5.0+911+f19012f9.x86_64
  - package containerd.io-1.6.11-3.1.el8.x86_64 obsoletes runc provided by runc-1.0.2-1.module_el8.5.0+911+f19012f9.x86_64
  - package containerd.io-1.6.12-3.1.el8.x86_64 conflicts with runc provided by runc-1.0.2-1.module_el8.5.0+911+f19012f9.x86_64
  - package containerd.io-1.6.12-3.1.el8.x86_64 obsoletes runc provided by runc-1.0.2-1.module_el8.5.0+911+f19012f9.x86_64
  - package containerd.io-1.6.13-3.1.el8.x86_64 conflicts with runc provided by runc-1.0.2-1.module_el8.5.0+911+f19012f9.x86_64

环境信息如下：

[root@tdh-node02 yum.repos.d]# cat  /etc/redhat-release
CentOS Linux release 8.4.2105
[root@tdh-node02 yum.repos.d]#
[root@tdh-node02 yum.repos.d]# uname -a
Linux tdh-node02 4.18.0-305.3.1.el8.x86_64 #1 SMP Tue Jun 1 16:14:33 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
[root@tdh-node02 yum.repos.d]#
[root@tdh-node02 yum.repos.d]# rpm -q podman
podman-3.0.1-6.module_el8.4.0+781+acf4c33b.x86_64
[root@tdh-node02 yum.repos.d]#
[root@tdh-node02 yum.repos.d]# rpm -q buildah
buildah-1.19.7-1.module_el8.4.0+781+acf4c33b.x86_64

3.2.2 解决

移除冲突的包podman和buildah

sudo yum erase podman buildah

安装成功

参考文章：

【精选】Centos8安装Docker_centos8 安装docker_Halyace的博客-CSDN博客

解决Centos8报Failed to download metadata for repo ‘appstream‘: Cannot prepare internal mirrorlist:...错误_centos8 error: failed to download metadata for rep-CSDN博客

docker: problem with installed package podman-3.0.1-6.module_el8.4.0+781+acf4c33b.x86_64-CSDN博客