yum 安装 ansible 报错如何解决，自定义线程池面试题

Requires: python-cryptography

Error: Package: ansible-2.9.21-1.el7.noarch (epel)

Requires: python-six

Error: Package: ansible-2.9.21-1.el7.noarch (epel)

Requires: PyYAML

Error: Package: python-paramiko-2.1.1-0.10.el7.noarch (epel)

Requires: python2-pyasn1

Error: Package: ansible-2.9.21-1.el7.noarch (epel)

Requires: python2-cryptography

Error: Package: ansible-2.9.21-1.el7.noarch (epel)

Requires: python-jinja2

Error: Package: ansible-2.9.21-1.el7.noarch (epel)

Requires: python-setuptools

You could try using --skip-broken to work around the problem

You could try running: rpm -Va --nofiles --nodigest

一、报错信息：

[root@ansible ~]# yum install -y ansible

Loaded plugins: fastestmirror

Repository epel is listed more than once in the configuration

Repository epel-debuginfo is listed more than once in the configuration

Repository epel-source is listed more than once in the configuration

Loading mirror speeds from cached hostfile

• epel: mirrors.tuna.tsinghua.edu.cn

Resolving Dependencies

--> Running transaction check

---> Package ansible.noarch 0:2.9.21-1.el7 will be installed

--> Processing Dependency: PyYAML for package: ansible-2.9.21-1.el7.noarch

--> Processing Dependency: python-httplib2 for package: ansible-2.9.21-1.el7.noarch

--> Processing Dependency: python-jinja2 for package: ansible-2.9.21-1.el7.noarch

--> Processing Dependency: python-paramiko for package: ansible-2.9.21-1.el7.noarch

--> Processing Dependency: python-setuptools for package: ansible-2.9.21-1.el7.noarch

--> Processing Dependency: python-six for package: ansible-2.9.21-1.el7.noarch

--> Processing Dependency: python2-cryptography for package: ansible-2.9.21-1.el7.noarch

--> Processing Dependency: python2-jmespath for package: ansible-2.9.21-1.el7.noarch

--> Processing Dependency: sshpass for package: ansible-2.9.21-1.el7.noarch

--> Running transaction check

---> Package ansible.noarch 0:2.9.21-1.el7 will be installed

--> Processing Dependency: PyYAML for package: ansible-2.9.21-1.el7.noarch

--> Processing Dependency: python-jinja2 for package: ansible-2.9.21-1.el7.noarch

--> Processing Dependency: python-setuptools for package: ansible-2.9.21-1.el7.noarch

--> Processing Dependency: python-six for package: ansible-2.9.21-1.el7.noarch

--> Processing Dependency: python2-cryptography for package: ansible-2.9.21-1.el7.noarch

---> Package python-paramiko.noarch 0:2.1.1-0.10.el7 will be installed

--> Processing Dependency: python-cryptography for package: python-paramiko-2.1.1-0.10.el7.noarch

--> Processing Dependency: python2-pyasn1 for package: python-paramiko-2.1.1-0.10.el7.noarch

---> Package python2-httplib2.noarch 0:0.18.1-3.el7 will be installed

---> Package python2-jmespath.noarch 0:0.9.4-2.el7 will be installed

---> Package sshpass.x86_64 0:1.06-1.el7 will be installed

--> Finished Dependency Resolution

Error: Package: python-paramiko-2.1.1-0.10.el7.noarch (epel)

Requires: python-cryptography

Error: Package: ansible-2.9.21-1.el7.noarch (epel)

Requires: python-six

Error: Package: ansible-2.9.21-1.el7.noarch (epel)

Requires: PyYAML

Error: Package: python-paramiko-2.1.1-0.10.el7.noarch (epel)

Requires: python2-pyasn1

Error: Package: ansible-2.9.21-1.el7.noarch (epel)

Requires: python2-cryptography

Error: Package: ansible-2.9.21-1.el7.noarch (epel)

Requires: python-jinja2

Error: Package: ansible-2.9.21-1.el7.noarch (epel)

Requires: python-setuptools

You could try using --skip-broken to work around the problem

You could try running: rpm -Va --nofiles --nodigest

二、如何解决

1、重装虚拟机

重装一台虚拟机,保证虚拟机可以上网，可以选择桥接模式网卡

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2、修改 yum 源

建议先备份 /etc/yum.repos.d/ 内的文件（CentOS 7 及之前为 CentOS-Base.repo，CentOS 8 为 CentOS-Linux-*.repo）

然后编辑 /etc/yum.repos.d/ 中的相应文件，在 mirrorlist= 开头行前面加 # 注释掉；并将 baseurl= 开头行取消注释（如果被注释的话），把该行内的域名（例如 mirror.centos.org）替换为 mirrors.tuna.tsinghua.edu.cn。

以上步骤可以被下方的命令一步完成

sudo sed -e 's|^mirrorlist=|#mirrorlist=|g' \

-e 's|^#baseurl=http://mirror.centos.org|baseurl=https://mirrors.tuna.tsinghua.edu.cn|g' \

-i.bak \

/etc/yum.repos.d/CentOS-*.repo

注意其中的*通配符，如果只需要替换一些文件中的源，请自行增删。

注意，如果需要启用其中一些 repo，需要将其中的 enabled=0 改为 enabled=1。

最后，更新软件包缓存

sudo yum makecache

3、使用 EPEL 源

yum install epel-release

当前 tuna 已经在 epel 的官方镜像列表里，所以不需要其他配置，mirrorlist 机制就能让你的服务器就近使用 tuna 的镜像。如果你想强制 你的服务器使用 tuna 的镜像，可以修改/etc/yum.repos.d/epel.repo，将 mirrorlist 和 metalink 开头的行注释掉。

接下来，取消注释这个文件里 baseurl 开头的行，并将其中的http://download.fedoraproject.org/pub替换成https://mirrors.tuna.tsinghua.edu.cn。

可以用如下命令自动替换：（来自 https://github.com/tuna/issues/issues/687）

sed -e 's!^metalink=!#metalink=!g' \

-e 's!^#baseurl=!baseurl=!g' \

-e 's!//download.fedoraproject.org/pub!//mirrors.tuna.tsinghua.edu.cn!g' \

-e 's!http://mirrors.tuna!https://mirrors.tuna!g' \

-i /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel-testing.repo

4、安装 ansible