Expand ext4 inside EBS without LVM

Expand ext4 inside EBS without LVM.md

1. Careful to stop Autoscaling procedures if necessary otherwise you may loose the machine and the disk;
2. Stop the server;
3. Umount the disk;
4. Create a snapshot;
5. Create a new volume with the wanted size using the snapshot;
6. Mount the volume in a running machine;

Using fdisk

a. Execute: fdisk /dev/xvd? according to the name you gave in (5);

b. Type pto print the partition table;

c. Save the starting block and the Id of the partition you want to enlarge;

d. Type d to delete the partition;

e. Type pto ensure the partition was deleted;

f. Type nto create a new partition;

g. Type pto choose the new partition as primary;

h. Type <ENTER> to confirm it as the first partition;

i. Type the starting block number you saved in step (c);

j. Type <ENTER>to accept the default end partition. This will make it use all the disk;

k. Type p to see the new partition configuration and review everything;

l. Type w to permanently write the information to the disk;

Using parted

a. Execute: parted /dev/xvd? according to the name you gave in (5);

b. Type print;

c. Type fix to fix the problems encontered in the GPT partition;

d. Save the number of the partition you want to enlarge;

e. Type resizepart ? according with the number of the partition you wanted saved in (d);

f. Type yes to confirm;

g. Type the size you want the partition to have;

h. Type print;

i. Type quit;

6. Mount the partition only to confirm the original partition is still working;
7. Umount the partition;
8. Execute partprobe to sync the new disk configuration to linux (You may also reboot Linux if you want);
9. Execute e2fsck -f /dev/xvd?1 to check the disk for errors;
10. Execute resize2fs /dev/xvd?1 to the disk so it will enlarge the partition to fit all disk as you configured;
11. Mount the partition only to confirm the new partition is still working;
12. Umount the partition;
13. Detach the disk from the running server;
14. Attach the disk to the old server as /dev/sda1;
15. Start the server;
16. Wait until the server is online;
17. SSh to the server to confirm its all working;
18. Restart the autoscaling procedures to allow the server to came back;
19. Change the autoscaling configuration so you will use a new disk of the size you want;