Why is root filesystem mounted read only while bootup on RHEL7 cloud images when bind mount for /tmp is added to fstab ?

Solution In Progress - Updated -

Issue

  • ON RHEL7 cloud images or RHEL 7 AMI instances , if a /tmp bind mounted is added , the root filesystem is mounted as read-only .
  • Root filesystem is mounted as read-only with following bind mount for /tmp in fstab & startup script .
/etc/fstab:
/tmp     /tmp    none    bind,noexec,nosuid,nodev        0 0
/etc/rc.d/init.d/local:
mount -o remount /tmp
# ln -s /etc/rc.d/init.d/local /etc/rc3.d/S99local

Environment

  • Red Hat Enterprise Linux 7 Amazon Machine Images
  • Red Hat Enterprise Linux 7 Cloud Image

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