报错详情如下：
Transaction check error: file /usr/bin/kubectl from install of kubernetes-client-1.5.2-0.7.git269f928.el7.x86_64 conflicts with file from package kubectl-1.18.5-0.x86_64 file /usr/bin/kubelet from install of kubernetes-node-1.5.2-0.7.git269f928.el7.x86_64 conflicts with file from package kubelet-1.18.5-0.x86_64 file /usr/lib/systemd/system/kubelet.service from install of kubernetes-node-1.5.2-0.7.git269f928.el7.x86_64 conflicts with file from package kubelet-1.18.5-0.x86_64 Error Summary -------------
原因：
用的是阿里的源，在下载源的过程中有如下操作：
先将这几个包删掉
yum -y remove kubectl-1.18.5-0.x86_64 kubelet-1.18.5-0.x86_64 kubelet-1.18.5-0.x86_64
再重新安装就可以了
[root@ajunyu yum.repos.d]# yum clean all;yum install kubernetes
Installed:
kubernetes.x86_64 0:1.5.2-0.7.git269f928.el7
Dependency Installed:
PyYAML.x86_64 0:3.10-11.el7 atomic-registries.x86_64 1:1.22.1-33.gitb507039.el7_8
audit-libs-python.x86_64 0:2.8.5-4.el7 checkpolicy.x86_64 0:2.5-8.el7
container-selinux.noarch 2:2.119.2-1.911c772.el7_8 container-storage-setup.noarch 0:0.11.0-2.git5eaf76c.el7
containers-common.x86_64 1:0.1.40-11.el7_8 docker.x86_64 2:1.13.1-162.git64e9980.el7.centos
docker-client.x86_64 2:1.13.1-162.git64e9980.el7.centos docker-common.x86_64 2:1.13.1-162.git64e9980.el7.centos
fuse-overlayfs.x86_64 0:0.7.2-6.el7_8 fuse3-libs.x86_64 0:3.6.1-4.el7
kubernetes-client.x86_64 0:1.5.2-0.7.git269f928.el7 kubernetes-master.x86_64 0:1.5.2-0.7.git269f928.el7
kubernetes-node.x86_64 0:1.5.2-0.7.git269f928.el7 libcgroup.x86_64 0:0.41-21.el7
libnl.x86_64 0:1.1.4-3.el7 libseccomp.x86_64 0:2.3.1-4.el7
libsemanage-python.x86_64 0:2.5-14.el7 libxml2-python.x86_64 0:2.9.1-6.el7.4
libyaml.x86_64 0:0.1.4-11.el7_0 oci-register-machine.x86_64 1:0-6.git2b44233.el7
oci-systemd-hook.x86_64 1:0.2.0-1.git05e6923.el7_6 oci-umount.x86_64 2:2.5-3.el7
policycoreutils-python.x86_64 0:2.5-34.el7 python-IPy.noarch 0:0.75-6.el7
python-backports.x86_64 0:1.0-8.el7 python-backports-ssl_match_hostname.noarch 0:3.5.0.1-1.el7
python-dateutil.noarch 0:1.5-7.el7 python-dmidecode.x86_64 0:3.12.2-4.el7
python-ethtool.x86_64 0:0.8-8.el7 python-inotify.noarch 0:0.9.4-4.el7
python-ipaddress.noarch 0:1.0.16-2.el7 python-pytoml.noarch 0:0.1.14-1.git7dea353.el7
python-setuptools.noarch 0:0.9.8-7.el7 python-six.noarch 0:1.9.0-2.el7
python-syspurpose.x86_64 0:1.24.26-3.el7.centos setools-libs.x86_64 0:3.3.8-4.el7
slirp4netns.x86_64 0:0.4.3-4.el7_8 subscription-manager.x86_64 0:1.24.26-3.el7.centos
subscription-manager-rhsm.x86_64 0:1.24.26-3.el7.centos subscription-manager-rhsm-certificates.x86_64 0:1.24.26-3.el7.centos
usermode.x86_64 0:1.111-6.el7 yajl.x86_64 0:2.0.4-4.el7
Complete!