volume_modification

# Modifying an EBS Volume
$ aws ec2 modify-volume --volume-type io1 --iops 100 --size 10  --volume-id vol-Xyz123456
{
    "VolumeModification": {
        "TargetSize": 10, 
        "TargetVolumeType": "io1", 
        "ModificationState": "modifying", 
        "VolumeId": "vol-Xyz123456", 
        "TargetIops": 100, 
        "StartTime": "2019-03-02T17:29:53.000Z", 
        "Progress": 0, 
        "OriginalVolumeType": "gp2", 
        "OriginalIops": 100, 
        "OriginalSize": 8
    }
}

# Monitoring the Progress of a Volume Modification

$ aws ec2 describe-volumes-modifications --volume-id vol-Xyz123456
{
    "VolumesModifications": [
        {
            "TargetSize": 10, 
            "TargetVolumeType": "io1", 
            "ModificationState": "optimizing", 
            "VolumeId": "vol-Xyz123456", 
            "TargetIops": 100, 
            "StartTime": "2019-03-02T17:29:53.000Z", 
            "Progress": 7, 
            "OriginalVolumeType": "gp2", 
            "OriginalIops": 100, 
            "OriginalSize": 8
        }
    ]
}

# Size before extending

# df -TH
/dev/xvda1     xfs       8.6G  1.3G  7.4G  15% /

# Extend an XFS filesystem

# xfs_growfs -d /
meta-data=/dev/xvda1             isize=512    agcount=4, agsize=524159 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1 spinodes=0
data     =                       bsize=4096   blocks=2096635, 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

# After
# df -TH /
Filesystem     Type  Size  Used Avail Use% Mounted on
/dev/xvda1     xfs    11G  1.3G  9.5G  12% /