docker拉取镜像 missing signature key

Trying to pull repository docker.io/library/nginx … missing signature key 查看当前docker版本都显示1.13的版本，那还真是远古版本的了。
查看docker版本

docker --version

1. 执行下面命令先删除再更新 docker自带的那个update看不懂啥意思

yum erase docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-selinux \
                  docker-engine-selinux \
                  docker-engine \
                  docker-ce

2. 重新安装docker

yum install docker-ce -y

查看docker版本

[root@localhost ~]# docker --version
Docker version 24.0.7, build afdd53b

再次拉去nginx

[root@localhost ~]# docker pull nginx
Using default tag: latest
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
[root@localhost ~]# service docker start
Redirecting to /bin/systemctl start docker.service
[root@localhost ~]# docker pull nginx
Using default tag: latest
latest: Pulling from library/nginx
af107e978371: Pull complete 
336ba1f05c3e: Pull complete 
8c37d2ff6efa: Pull complete 
51d6357098de: Pull complete 
782f1ecce57d: Pull complete 
5e99d351b073: Pull complete 
7b73345df136: Pull complete 
Digest: sha256:2bdc49f2f8ae8d8dc50ed00f2ee56d00385c6f8bc8a8b320d0a294d9e3b49026
Status: Downloaded newer image for nginx:latest
docker.io/library/nginx:latest

拉去成功了