System goes into read-only mode after upgrading to CentOS 7.4.
"kernel: XFS (dm-0): unknown mount option [acl]"
Remove acl option for xfs filesystem.
/dev/mapper/centos-root / xfs defaults,acl 0 0
In XFS file-system acl is enabled by default. Therefore, it is not needed to mention it explicitly in /etc/fstab file. Prior to CentOS 7.4, acl option was being ignored by systemd daemon even if it was added in /etc/fstab for xfs file-system.
Alternative, what it not recommended but it works, change “ro” read-only to “rw” read-write in /etc/grub2.cfg file.
linux16 /vmlinuz-3.10.0-693.11.6.el7.x86_64 root=/dev/mapper/centos-root rw rd.lvm.lv=centos/root rd.lvm.lv=centos/swap crashkernel=auto rhgb quiet