atomic scanner fails with Read-only file system error on RHEL

[navidshaikh]

We got an atomic scanner which performs following operation

yum -q check-update --installroot=/scanin/<hash>

Scanner source code here This scanner works fine with CentOS base image, and CentOS based image_under_test.

We recently rebased this scanner onto RHEL7 base image and tried scanning another RHEL based container. It is failing with error

[Errno 30] Read-only file system: '/scanin/6fe46a33a57749b352ed567eb9b330f381d9a2efd2aaaccb4c221a2e8cc9ca83/etc/yum.repos.d/redhat.repo'
Cannot open logfile /scanin/6fe46a33a57749b352ed567eb9b330f381d9a2efd2aaaccb4c221a2e8cc9ca83/var/log/yum.log
ovl: Error while doing RPMdb copy-up:
[Errno 30] Read-only file system: '/scanin/6fe46a33a57749b352ed567eb9b330f381d9a2efd2aaaccb4c221a2e8cc9ca83/var/lib/rpm/.dbenv.lock'
Could not create lock at /scanin/6fe46a33a57749b352ed567eb9b330f381d9a2efd2aaaccb4c221a2e8cc9ca83/var/run/yum.pid: [Errno 30] Read-only file system: '/scanin/6fe46a33a57749b352ed567eb9b330f381d9a2efd2aaaccb4c221a2e8cc9ca83/var/run/yum.pid' 

Can't create lock file; exiting

on

[root@localhost ~]# cat /etc/os-release 
NAME="Red Hat Enterprise Linux Server"
VERSION="7.4 (Maipo)"
VERSION_ID="7.4"
[..]
[root@localhost ~]# rpm -q atomic
atomic-1.22.1-1.gitd36c015.el7.x86_64

The image_under_test is mounted Read-only onto /scanin directory, while for CentOS based platform it could create lock file(read-write mode).

How to get image_under_test mounted with read-write mode on /scanin directory?

[navidshaikh]

I had to use atomic mount -o rw $IMAGE /mnt before executing atomic scan. This solved the issue.