fix nmap

[hoomand]

Overview

Fixing the current error with Docker install, as it cannot find the URL in mirror list. It should be due to missing GPG key.

ENTRYPOINT ["/usr/bin/nmap"]
CMD ["-sn", "172.17.0.0/24"]
[ec2-user@ip-172-31-63-211 dockerfile]$ docker build -t nmap .
Sending build context to Docker daemon  3.072kB
Step 1/6 : FROM centos
latest: Pulling from library/centos
a1d0c7532777: Pull complete
Digest: sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177
Status: Downloaded newer image for centos:latest
 ---> 5d0da3dc9764
Step 2/6 : MAINTAINER Sander <mail@sandervanvugt.nl>
 ---> Running in 9e9d83a81be5
Removing intermediate container 9e9d83a81be5
 ---> 2e217486f358
Step 3/6 : ADD ./sander.repo /etc/yum.repos.d/
 ---> e04d2fea7e89
Step 4/6 : RUN yum --assumeyes update && yum --assumeyes install bash nmap iproute && yum clean all
 ---> Running in a04c530f77f9
CentOS Linux 8 - AppStream                      203  B/s |  38  B     00:00
Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
The command '/bin/sh -c yum --assumeyes update && yum --assumeyes install bash nmap iproute && yum clean all' returned a non-zero code: 1

What has changed?

Use vault.centos.org instead of yum.repos.d