Amazon EC2 Volume Snapshot Creation and Recovery

Amazon EC2 Volume Snapshot Creation Recovery

Login into the Linux instance and perform the command

df -h

lsblk

fdisk -l

file -s /dev/xvdf 


to verify the allocated sapce fdisk -l

[root@ip-172-31-12-159 ec2-user]# fdisk -l
WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.

Disk /dev/xvda: 8589 MB, 8589934592 bytes, 16777216 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
Disk label type: gpt


#         Start          End    Size  Type            Name
 1         4096     16777182      8G  Linux filesyste Linux
128         2048         4095      1M  BIOS boot parti BIOS Boot Partition

Disk /dev/xvdf: 9663 MB, 9663676416 bytes, 18874368 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
 

to create the file system .ext4 in new volume

[root@ip-172-31-12-159 ec2-user]# mkfs.ext4 dev/xvdf
mke2fs 1.42.12 (29-Aug-2014)
The file dev/xvdf does not exist and no size was specified.
[root@ip-172-31-12-159 ec2-user]# mkfs.ext4 /dev/xvdf
mke2fs 1.42.12 (29-Aug-2014)
Creating filesystem with 2359296 4k blocks and 589824 inodes
Filesystem UUID: 7c1f2d68-b651-41f5-a977-637ce1c29da2
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632

Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done


create directory

mkdir tamil

mount

[root@ip-172-31-12-159 /]# mount /dev/xvdf /tamil/


[root@ip-172-31-12-159 /]# df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        488M   60K  488M   1% /dev
tmpfs           497M     0  497M   0% /dev/shm
/dev/xvda1      7.8G  1.1G  6.7G  14% /
/dev/xvdf       8.8G   21M  8.3G   1% /tamil



[root@ip-172-31-12-159 /]# cd /tamil/
[root@ip-172-31-12-159 tamil]# mkdir test1 test2 test3
[root@ip-172-31-12-159 tamil]# ls
lost+found  test1  test2  test3
[root@ip-172-31-12-159 tamil]# cd test1
[root@ip-172-31-12-159 test1]# vi tamil
[root@ip-172-31-12-159 test1]# cat tamil
hello tamil



cd /

unmount the volume form the instance

[root@ip-172-31-12-159 /]# umount /tamil


[root@ip-172-31-12-159 /]# df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        488M   60K  488M   1% /dev
tmpfs           497M     0  497M   0% /dev/shm
/dev/xvda1      7.8G  1.1G  6.7G  14% /

                                     

detatch the volume form aws console and take the snapshot of the volume


once snapshot is created and delete the volume which you detached
by using the snapshot create the volume and attach to the instance



check in the instance

[root@ip-172-31-12-159 ec2-user]# fdisk -l
WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.

Disk /dev/xvda: 8589 MB, 8589934592 bytes, 16777216 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
Disk label type: gpt


#         Start          End    Size  Type            Name
 1         4096     16777182      8G  Linux filesyste Linux
128         2048         4095      1M  BIOS boot parti BIOS Boot Partition

Disk /dev/xvdf: 9663 MB, 9663676416 bytes, 18874368 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


[root@ip-172-31-12-159 ec2-user]# file -s /dev/xvdf
/dev/xvdf: Linux rev 1.0 ext4 filesystem data, UUID=7c1f2d68-b651-41f5-a977-637ce1c29da2 (extents) (large files) (huge files)
[root@ip-172-31-12-159 ec2-user]#


don't create the filesystem again, if create the fs it will destory ur data


[root@ip-172-31-12-159 ec2-user]# cd /

[root@ip-172-31-12-159 /]# mount /dev/xvdf /tamil


[root@ip-172-31-12-159 /]# df-h
bash: df-h: command not found
[root@ip-172-31-12-159 /]# df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        488M   60K  488M   1% /dev
tmpfs           497M     0  497M   0% /dev/shm
/dev/xvda1      7.8G  1.1G  6.7G  14% /
/dev/xvdf       8.8G   21M  8.3G   1% /tamil


[root@ip-172-31-12-159 /]# cd /tamil
[root@ip-172-31-12-159 tamil]# ls
lost+found  test1  test2  test3

[root@ip-172-31-12-159 tamil]# ls -ltr
total 28
drwx------ 2 root root 16384 Dec 12 14:48 lost+found
drwxr-xr-x 2 root root  4096 Dec 12 14:55 test3
drwxr-xr-x 2 root root  4096 Dec 12 14:55 test2
drwxr-xr-x 2 root root  4096 Dec 12 14:56 test1

[root@ip-172-31-12-159 tamil]# cd test1
[root@ip-172-31-12-159 test1]# ls-ltr
bash: ls-ltr: command not found
[root@ip-172-31-12-159 test1]# ls -ltr
total 4
-rw-r--r-- 1 root root 13 Dec 12 14:56 tamil
[root@ip-172-31-12-159 test1]# cat tamil

hello tamil
[root@ip-172-31-12-159 test1]#