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Bug 1885875

Summary:	xfs_growfs: /dev/mapper/rhel-root is not a mounted XFS filesystem
Product:	Red Hat Enterprise Linux 8	Reporter:	Raman kumar <raman36127>
Component:	xfsprogs	Assignee:	Eric Sandeen <esandeen>
Status:	CLOSED NOTABUG	QA Contact:	Zorro Lang <zlang>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	8.0	CC:	agk, esandeen, heinzm, jbrassow, msnitzer, prajnoha, xzhou, zkabelac
Target Milestone:	rc	Flags:	pm-rhel: mirror+
Target Release:	8.0
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-10-11 08:12:38 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Raman kumar 2020-10-07 08:55:32 UTC

[root@ps-um7-ogs-lin-7 ISO]# lvextend -L+15G /dev/mapper/rhel-root
  Size of logical volume rhel/root changed from 36.32 GiB (9298 extents) to 51.32 GiB (13138 extents).
  Logical volume rhel/root successfully resized.

[root@ps-um7-ogs-lin-7 ISO]# resize2fs /dev/mapper/rhel-root
resize2fs 1.44.3 (10-July-2018)
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/rhel-root
Couldn't find valid filesystem superblock.

[root@ps-um7-ogs-lin-7 ISO]# mount | grep rhel-root
/dev/mapper/rhel-root on / type xfs (rw,relatime,attr2,inode64,noquota)

[root@ps-um7-ogs-lin-7 ~]# df -Th
Filesystem            Type      Size  Used Avail Use% Mounted on
/dev/mapper/rhel-root xfs        37G   34G  2.4G  94% /
/dev/mapper/rhel-home xfs        18G   12G  6.2G  66% /home
/dev/sda1             xfs      1014M  169M  846M  17% /boot


[root@ps-um7-ogs-lin-7 ISO]# xfs_growfs /dev/mapper/rhel-root
xfs_growfs: /dev/mapper/rhel-root is not a mounted XFS filesystem

Comment 1 Eric Sandeen 2020-10-07 21:20:23 UTC

You did not specify your xfsprogs version, but older xfs_growfs requires the mount point as an argument, not the device:

SYNOPSIS
       xfs_growfs [ -dilnrx ] [ -D size ] [ -e rtextsize ] [ -L size ] [ -m maxpct ] [ -t mtab ] [ -R size ] mount-point

This was changed in later versions:

* Sat Dec 14 2019 Eric Sandeen <sandeen> 5.0.0-2
- mkfs.xfs: validate log stripe unit alignment (#1632596)
- xfs_growfs: allow mounted device node as argument (#1765217)

SYNOPSIS
       xfs_growfs [ -dilnrx ] [ -D size ] [ -e rtextsize ] [ -L size ] [ -m maxpct ] [ -t mtab ] [ -R size ] [ mount-point | block-device ]


Please check your man page for proper usage of the utility.

Comment 2 Zdenek Kabelac 2020-10-11 08:12:38 UTC

If user wants to grow  LV together with fileysystem - there is support from 'lvm2' side with option '-r'
(or using the tool fsadm)

So user may use "lvextend -r -L+15G /dev/mapper/rhel-root"  and tooling will automatically
handle mounting and unmounting behind the scene.

Comment 3 Raman kumar 2020-10-13 06:20:17 UTC

 Thanks Zdenek Kabelac,

Worked for me. 


#lvextend -r -L+5G /dev/mapper/rhel-root
  Size of logical volume rhel/root changed from 51.32 GiB (13138 extents) to 56.32 GiB (14418 extents).
  Logical volume rhel/root successfully resized.
meta-data=/dev/mapper/rhel-root  isize=512    agcount=4, agsize=2380288 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=0
         =                       reflink=1
data     =                       bsize=4096   blocks=9521152, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
log      =internal log           bsize=4096   blocks=4649, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 9521152 to 14764032


/dev/mapper/rhel-root   57G   35G   23G  61% /


Thanks. you can close this ticket.