If you're trying to mount network devices automatically at boot on Linux and your system is not booting correctly. This post is for you.
Today I was working with iscsi. I created portals, acls, luns, targets with targetcli. But when I tried to mount it automatically through fstab file on boot, my system wasn't booting. I looked online and I found that I had to change the mount option. I did and it worked. I am going to write what mount option I used in this post.
When my system wasn't booting, my /etc/fstab configuration file looked like this,
# # /etc/fstab # Created by anaconda on Thu Nov 24 03:07:55 2016 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # /dev/mapper/centos-root / xfs defaults 0 0 UUID=0d83fc00-ee94-4741-8163-717418187f59 /boot xfs defaults 0 0 /dev/mapper/centos-swap swap swap defaults 0 0 UUID=f246ba49-5772-4efc-bec2-28ff76f46f79 /root/mounts/sdb xfs defaults 0 0
Here UUID=f246ba49-5772-4efc-bec2-28ff76f46f79, this is the iscsi drive I was trying to mount. The mount option was "defaults". But to get it to work, I had to change the mount option to "_netdev". What this option does it, it attempts to mount this device after all the network connection is initialized.
So my working configuration looked like this,
# # /etc/fstab # Created by anaconda on Thu Nov 24 03:07:55 2016 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # /dev/mapper/centos-root / xfs defaults 0 0 UUID=0d83fc00-ee94-4741-8163-717418187f59 /boot xfs defaults 0 0 /dev/mapper/centos-swap swap swap defaults 0 0 UUID=f246ba49-5772-4efc-bec2-28ff76f46f79 /root/mounts/sdb xfs _netdev 0 0
Tested on: CentOS 7
