BEFORE resize.sh
openshift@openshift:~/Documents/dev/64$ df
Filesystem     1K-blocks     Used Available Use% Mounted on
udev             1942984        0   1942984   0% /dev
tmpfs             392476     6572    385904   2% /run
/dev/sda2      235701904 65388304 158317236  30% /
tmpfs            1962372   395900   1566472  21% /dev/shm
tmpfs               5120        4      5116   1% /run/lock
tmpfs            1962372        0   1962372   0% /sys/fs/cgroup
/dev/sda1         523248     3668    519580   1% /boot/efi
cgmfs                100        0       100   0% /run/cgmanager/fs
tmpfs             392476       72    392404   1% /run/user/1000
/dev/mmcblk0p2   3593172   713696   2677236  22% /media/openshift/rootfs
/dev/mmcblk0p1     51082    12102     38980  24% /media/openshift/BOOT
openshift@openshift:~/Documents/dev/64$ cd media/openshift/rootfs


AFTER Resize.sh
openshift@openshift:/media/openshift/rootfs/usr/local/sbin$ df
Filesystem     1K-blocks     Used Available Use% Mounted on
udev             1942984        0   1942984   0% /dev
tmpfs             392476     6572    385904   2% /run
/dev/sda2      235701904 65388304 158317236  30% /
tmpfs            1962372   395900   1566472  21% /dev/shm
tmpfs               5120        4      5116   1% /run/lock
tmpfs            1962372        0   1962372   0% /sys/fs/cgroup
/dev/sda1         523248     3668    519580   1% /boot/efi
cgmfs                100        0       100   0% /run/cgmanager/fs
tmpfs             392476       72    392404   1% /run/user/1000
/dev/mmcblk0p2  30550772   716364  28540428   3% /media/openshift/rootfs
/dev/mmcblk0p1     51082    12102     38980  24% /media/openshift/BOOT


_______________________________________________________________________________
RAN-RESIZE-SCRIPT as follows

openshift@openshift:/media/openshift/rootfs/usr/local/sbin$ sudo ./resize_rootfs.sh
[sudo] password for openshift: 
+ DEVICE=/dev/mmcblk0
+ PART=2
+ resize
+ fdisk -l /dev/mmcblk0
+ grep /dev/mmcblk0p2
+ awk {print $2}
+ start=143360
+ echo 143360
143360
+ set +e
+ fdisk /dev/mmcblk0

Welcome to fdisk (util-linux 2.27.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.


Command (m for help): Disk /dev/mmcblk0: 29.7 GiB, 31914983424 bytes, 62333952 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x808ac36f

Device         Boot  Start     End Sectors  Size Id Type
/dev/mmcblk0p1       40960  143359  102400   50M  c W95 FAT32 (LBA)
/dev/mmcblk0p2      143360 7577599 7434240  3.6G 83 Linux

Command (m for help): Partition number (1,2, default 2): 
Partition 2 has been deleted.

Command (m for help): Partition type
   p   primary (1 primary, 0 extended, 3 free)
   e   extended (container for logical partitions)
Select (default p): Partition number (2-4, default 2): First sector (2048-62333951, default 2048): Last sector, +sectors or +size{K,M,G,T,P} (143360-62333951, default 62333951): 
Created a new partition 2 of type 'Linux' and of size 29.7 GiB.

Command (m for help): The partition table has been altered.
Calling ioctl() to re-read partition table.
Re-reading the partition table failed.: Device or resource busy

The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8).

+ set -e
+ partx -u /dev/mmcblk0
+ resize2fs /dev/mmcblk0p2
resize2fs 1.42.13 (17-May-2015)
Filesystem at /dev/mmcblk0p2 is mounted on /media/openshift/rootfs; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 2
The filesystem on /dev/mmcblk0p2 is now 7773824 (4k) blocks long.

+ echo Done!
Done!