sensu packages missing dependency for useradd/groupadd

[treydock]

Expected Behavior

I'd expect yum install sensu-agent to succeed.

Current Behavior

Install sensu-agent on amazonlinux:2 docker container and install fails because useradd and groupadd are missing.

Possible Solution

Add Requires: shadow-utils to RPM spec for sensu packages that add users and groups. May be able to instead add Requires: /usr/sbin/useradd instead.

Steps to Reproduce (for bugs)

1. docker run -it amazonlinux:2 /bin/bash
2. curl -s https://packagecloud.io/install/repositories/sensu/nightly/script.rpm.sh | bash
3. yum install sensu-agent
4. Error:

//var/tmp/rpm-tmp.bsFUZi: line 119: groupadd: command not found
/var/tmp/rpm-tmp.bsFUZi: line 201: useradd: command not found
error: %pre(sensu-agent-2.0.0~nightly+20180707-1.x86_64) scriptlet failed, exit status 127
Error in PREIN scriptlet in rpm package sensu-agent-2.0.0~nightly+20180707-1.x86_64
  Verifying  : sensu-agent-2.0.0~nightly+20180707-1.x86_64                                                                                                                       1/1
u
Failed:
  sensu-agent.x86_64 0:2.0.0~nightly+20180707-1

5. yum install shadow-utils
6. yum install sensu-agent - SUCCESS

Context

I am evaluating adding Amazon Linux support to sensu-puppet project for Sensu 2.0.

Your Environment

• Sensu version used (sensuctl, sensu-backend, and/or sensu-agent): sensu-agent version 2.0.0-nightly#7cb4b9d, build 7cb4b9da29522b7e54d18ea219d5ed8159320ea5, built 2018-07-07T09:19:17+0000
• Installation method (packages, binaries, docker etc.): RPM
• Operating System and version (e.g. Ubuntu 14.04): Amazon Linux 2.0

[grepory]

@preed We may need to do this.

[annaplotkin]

@treydock Is this still a thing?