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Technical Note: Adding space to Linux partitions when a customer needs additional drive space for their VM

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Systems Impacted 

Impact: High

The following systems are impacted:

  • Smart Suite 
  • Red Hat 5

Overview

After a customer has added space to their database server virtual machines, the following process is needed for Linux to utilize this additional VM storage.  

Remediation

Process Steps

Prior to beginning this procedure, the customer needs to make a clone of the VM to provide a backup.

  1. Verify Red Hat 5 is being used.

    more /etc/redhat-release 

    Red Hat Enterprise Linux Server release 5.11 (Tikanga)

 Work with your Spok DBA to ensure the server you are touching is not the primary DB.  If it is primary, the DBA will need to perform a failover.  During this time, the customer will see a 30 second freeze system wide.  Next, the Spok DBA will disable FSFO.

  1. Verify the default Smart Suite VM is in place by checking that the current hard drive looks like the following:

    [root@05092018Diskpart ~]# df -h

    Filesystem            Size  Used Avail Use% Mounted on

    /dev/mapper/VolGroup00-LogVol01

                          250G   29G  209G  12% /

    /dev/mapper/VolGroup00-LogVol02

                          4.8G  1.1G  3.5G  23% /var

    /dev/mapper/VolGroup00-LogVol03

                          4.8G  149M  4.4G   4% /var/log

    /dev/mapper/VolGroup00-LogVol05

                          1.4G   43M  1.3G   4% /tmp

    /dev/mapper/VolGroup00-LogVol04

                           19G  181M   18G   1% /var/log/audit

    /dev/sda1             289M   25M  250M   9% /boot

    tmpfs                  16G     0   16G   0% /dev/shm

    [root@testpart57db01 ~]# fdisk /dev/sda

     

    The number of cylinders for this disk is set to 39162.

    There is nothing wrong with that, but this is larger than 1024,

    and could in certain setups cause problems with:

    1) software that runs at boot time (e.g., old versions of LILO)

    2) booting and partitioning software from other OSs

       (e.g., DOS FDISK, OS/2 FDISK)

     

    Command (m for help): p

     

    Disk /dev/sda: 322.1 GB, 322122547200 bytes

    255 heads, 63 sectors/track, 39162 cylinders

    Units = cylinders of 16065 * 512 = 8225280 bytes

     

       Device Boot      Start         End      Blocks   Id  System

    /dev/sda1   *           1          38      305203+  83  Linux

    /dev/sda2              39       39162   314263530   8e  Linux LVM

     

    Command (m for help): q

     

  2. The customer needs to increase the VMware disk by 100 GB (VMware edit settings). 

    Then the VM needs to be rebooted to make the new space available to grow in.

    [root@testpart57db01 ~]# reboot

     

    Broadcast message from root (pts/1) (Wed May  9 18:56:33 2018):

     

    The system is going down for reboot NOW!

     

  3. Log back into the system after reboot. 

    #### Who is currently logged in ####

    18:58:58 up 1 min,  1 user,  load average: 0.64, 0.17, 0.05

    USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT

    root     pts/0    berney.corp.ad.p 18:58    0.00s  0.00s  0.00s -bash

    [root@testpart57db01 ~]# fdisk /dev/sda

     

    The number of cylinders for this disk is set to 52216.

    There is nothing wrong with that, but this is larger than 1024,

    and could in certain setups cause problems with:

    1) software that runs at boot time (e.g., old versions of LILO)

    2) booting and partitioning software from other OSs

       (e.g., DOS FDISK, OS/2 FDISK)

     

    Command (m for help): p

     

    Disk /dev/sda: 429.4 GB, 429496729600 bytes

    255 heads, 63 sectors/track, 52216 cylinders

    Units = cylinders of 16065 * 512 = 8225280 bytes

     

       Device Boot      Start         End      Blocks   Id  System

    /dev/sda1   *           1          38      305203+  83  Linux

    /dev/sda2              39       39162   314263530   8e  Linux LVM

     

  4. Command (m for help): n

    Command action

       e   extended

       p   primary partition (1-4)

    p

    Partition number (1-4): 3

    First cylinder (39163-52216, default 39163):

    Using default value 39163

    Last cylinder or +size or +sizeM or +sizeK (39163-52216, default 52216):

    Using default value 52216

     

    Command (m for help): p

     

    Disk /dev/sda: 429.4 GB, 429496729600 bytes

    255 heads, 63 sectors/track, 52216 cylinders

    Units = cylinders of 16065 * 512 = 8225280 bytes

     

       Device Boot      Start         End      Blocks   Id  System

    /dev/sda1   *           1          38      305203+  83  Linux

    /dev/sda2              39       39162   314263530   8e  Linux LVM

    /dev/sda3           39163       52216   104856255   83  Linux

     

    Command (m for help): t

    Partition number (1-4): 3

     

    Hex code (type L to list codes): 8e


    Command (m for help): p

     

    Disk /dev/sda: 429.4 GB, 429496729600 bytes

    255 heads, 63 sectors/track, 52216 cylinders

    Units = cylinders of 16065 * 512 = 8225280 bytes

     

       Device Boot      Start         End      Blocks   Id  System

    /dev/sda1   *           1          38      305203+  83  Linux

    /dev/sda2              39       39162   314263530   8e  Linux LVM

    /dev/sda3           39163       52216   104856255   8e  Linux LVM

     

    Command (m for help): w

    The partition table has been altered!

     

    Calling ioctl() to re-read partition table.

     

    WARNING: Re-reading the partition table failed with error 16: Device or resource busy.

    The kernel still uses the old table.

    The new table will be used at the next reboot.

    Syncing disks.

    [root@testpart57db01 ~]# reboot
     

  5. Log back into the system after reboot. 

    #### Who is currently logged in ####

    14:05:05 up 1 min,  1 user,  load average: 0.83, 0.23, 0.08

    USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT

    root     pts/0    berney.corp.ad.p 14:05    0.00s  0.00s  0.00s -bash

    [root@testpart57db01 ~]# pvcreate /dev/sda3

      dev_is_mpath: failed to get device for 8:3

    The desired output is the following:

      Writing physical volume data to disk "/dev/sda3"

      Physical volume "/dev/sda3" successfully created
     

    [root@testpart57db01 ~]# pvdisplay

      --- Physical volume ---

      PV Name               /dev/sda2

      VG Name               VolGroup00

      PV Size               299.71 GB / not usable 17.98 MB

      Allocatable           yes (but full)

      PE Size (KByte)       32768

      Total PE              9590

      Free PE               0

      Allocated PE          9590

      PV UUID               m3csO8-1gx4-Au7f-i7dT-Zw8d-1BUr-S0OeZ7

     

      "/dev/sda3" is a new physical volume of "100.00 GB"

      --- NEW Physical volume ---

      PV Name               /dev/sda3

      VG Name

      PV Size               100.00 GB

      Allocatable           NO

      PE Size (KByte)       0

      Total PE              0

      Free PE               0

      Allocated PE          0

      PV UUID               M3n0XD-zErO-arbw-bucm-qulq-NIxT-Xrma1O

     

    [root@testpart57db01 ~]# vgextend VolGroup00 /dev/sda3

      Volume group "VolGroup00" successfully extended
     

    [root@sm57dbtestpart ~]# pvdisplay

      --- Physical volume ---

      PV Name               /dev/sda2

      VG Name               VolGroup00

      PV Size               299.71 GB / not usable 17.98 MB

      Allocatable           yes (but full)

      PE Size (KByte)       32768

      Total PE              9590

      Free PE               0

      Allocated PE          9590

      PV UUID               6J0g8g-5I3u-5dwU-ZGeB-1EnM-Gdxu-0CatQE

     

      --- Physical volume ---

      PV Name               /dev/sda3

      VG Name               VolGroup00

      PV Size               100.00 GB / not usable 30.69 MB

      Allocatable           yes

      PE Size (KByte)       32768

      Total PE              3199

      Free PE               3199

      Allocated PE          0

      PV UUID               PdUUfC-2Bq1-f7lA-jHYj-dQF1-eGbl-abVXQE

     

    [root@testpart57db01 ~]# lvextend -l +100%FREE /dev/VolGroup00/LogVol01

      Extending logical volume LogVol01 to 357.22 GB

      Logical volume LogVol01 successfully resized
     

    [root@testpart57db01 ~]# resize2fs /dev/VolGroup00/LogVol01

    resize2fs 1.39 (29-May-2006)

    Filesystem at /dev/VolGroup00/LogVol01 is mounted on /; on-line resizing required

    Performing an on-line resize of /dev/VolGroup00/LogVol01 to 93642752 (4k) blocks.

    The filesystem on /dev/VolGroup00/LogVol01 is now 93642752 blocks long.

    [root@testpart57db01 ~]# df -hP

    Filesystem            Size  Used Avail Use% Mounted on

    /dev/mapper/VolGroup00-LogVol01  347G   29G  300G   9% /

    /dev/mapper/VolGroup00-LogVol02  4.8G  1.1G  3.5G  23% /var

    /dev/mapper/VolGroup00-LogVol03  4.8G  148M  4.4G   4% /var/log

    /dev/mapper/VolGroup00-LogVol05  1.4G   43M  1.3G   4% /tmp

    /dev/mapper/VolGroup00-LogVol04   19G  180M   18G   1% /var/log/audit

    /dev/sda1             289M   25M  250M   9% /boot

    tmpfs                  16G  508M   16G   4% /dev/shm

    [root@testpart57db01 ~]#

    The Spok DBA can now re-enable FSFO (and failback if needed).