解决办法：关闭selinux

[root@k8s-master ~]# docker push 10.0.0.10:5000/nginxThe push refers to a repository [10.0.0.10:5000/nginx]22439467ad99: Retrying in 1 second b4a29beac87c: Retrying in 1 second 488dfecc21b1: Retrying in 1 second received unexpected HTTP status: 500 Internal Server Error[root@k8s-master ~]# setenforce 0[root@k8s-master ~]# docker push 10.0.0.10:5000/nginxThe push refers to a repository [10.0.0.10:5000/nginx]22439467ad99: Pushed b4a29beac87c: Pushed 488dfecc21b1: Pushed latest: digest: sha256:62f787b94e5faddb79f96c84ac0877aaf28fb325bfc3601b9c0934d4c107ba94 size: 948[root@k8s-master ~]# vim /etc/selinux/config # This file controls the state of SELinux on the system.# SELINUX= can take one of these three values:# enforcing - SELinux security policy is enforced.# permissive - SELinux prints warnings instead of enforcing.# disabled - No SELinux policy is loaded.SELINUX=disabled# SELINUXTYPE= can take one of three values:# targeted - Targeted processes are protected,# minimum - Modification of targeted policy. Only selected processes are protected. # mls - Multi Level Security protection.SELINUXTYPE=targeted