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    How to extend AWS EBS volumes with no downtime

    How to extend AWS EBS volumes with no downtime

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    If you need to extend your EBS volume With No Downtime, please follow these simple steps:



    • Login to your AWS console
    • Choose “EC2” from the services list
    • Click on “Volumes” under ELASTIC BLOCK STORE menu.
    • Choose the volume that you want to resize, right click on it and click “Modify Volume”


    AWS

    Set the new size for your EBS volume (in this case i have extended an 8GB volume to 50GB)



    • Click on modify.




    Now, we need to extend the partition itself.




    • SSH to the EC2 instance where the EBS volume is attached.
    • Type the following command to list our block devices:



    [root@awsserver ~]# lsblk
    NAME    MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
    xvda    202:0    0   50G  0 disk
    └─xvda1 202:1    0    8G  0 part /



    • As you can See root Device is showing 50GB but the partition is showing 8GB. Now Grow the partition.



    [root@awsserver ~]#  growpart /dev/xvda 1
    CHANGED: partition=1 start=2048 old: size=16775168 end=16777216 new: size=104855519,end=104857567



    • We have a XFS filesystem so ran , xfs_growfs



    [root@awsserver ~]#  xfs_growfs /
    meta-data=/dev/xvda1             isize=512    agcount=4, agsize=524224 blks
             =                       sectsz=512   attr=2, projid32bit=1
             =                       crc=1        finobt=0 spinodes=0
    data     =                       bsize=4096   blocks=2096896, imaxpct=25
             =                       sunit=0      swidth=0 blks
    naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
    log      =internal               bsize=4096   blocks=2560, version=2
             =                       sectsz=512   sunit=0 blks, lazy-count=1
    realtime =none                   extsz=4096   blocks=0, rtextents=0
    data blocks changed from 2096896 to 13106939
    [root@awsserver ~]#



    • Now Check the File System Size :


    [centos@awsserver ~]$ df -h /
    Filesystem      Size  Used Avail Use% Mounted on
    /dev/xvda1       50G   12G   39G  23% /
    [centos@awsserver ~]$


    You have just extended your EBS volume size.

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