Upgrade CRIN4 to 2GB of RAM

[chris]

Ticket to track the upgrading of Crin4 from 1GB to 2GB of RAM.

[chris]

The server has been shutdown and restarted so the extra RAM is available:

free -h
             total       used       free     shared    buffers     cached
Mem:          2.0G       381M       1.6G        12M        18M       147M
-/+ buffers/cache:       215M       1.8G
Swap:         707M         0B       707M

And this should start to ​show up on Munin soon.

Looking at the disk, using fdisk we have:

Command (m for help): p
Disk /dev/sda: 32 GiB, 34359738368 bytes, 67108864 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
Disklabel type: dos
Disk identifier: 0xac596b78

Device     Boot  Start      End  Sectors  Size Id Type
/dev/sda1  *      2048   499711   497664  243M 83 Linux
/dev/sda2       501758 33552383 33050626 15.8G  5 Extended
/dev/sda5       501760 33552383 33050624 15.8G 8e Linux LVM

And using pvdisplay:

 pvdisplay 
  --- Physical volume ---
  PV Name               /dev/sda5
  VG Name               CRIN4-vg
  PV Size               15.76 GiB / not usable 2.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              4034
  Free PE               0
  Allocated PE          4034
  PV UUID               VkSyeC-iC5r-QTn9-fTwt-21fO-LFSo-m8pKML

And the results of vgdisplay:

  --- Volume group ---
  VG Name               CRIN4-vg
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               15.76 GiB
  PE Size               4.00 MiB
  Total PE              4034
  Alloc PE / Size       4034 / 15.76 GiB
  Free  PE / Size       0 / 0   
  VG UUID               nUqP0h-Ss5N-C2Nb-1WJQ-riUf-u5uB-naW2Le

And the advice from 1984.is is:

You first need to add a partition on the free space available to you after
you run it again. This is a good howto
​https://www.turnkeylinux.org/blog/extending-lvm , just remember you are
working with a partition not a disk. When you have expanded the lvm volume
you need to expand the file system.

So I think we need to do the following

pvcreate /dev/sda2
vgextend /dev/CRIN4-vg /dev/sda2

But I'll run that past 1984.is before I do anything.

[chris]

I have added a sudo account for 1984 so they can look at extending the root partition.

[chris]

The notes here were used for adding the account https://trac.crin.org.archived.website/trac/wiki/Crin4#sshaccess

The steps that 1984 followed:

 1  sudo fdisk -l /dev/sda
 2  sudo cfdisk /dev/sda
 3  sudo fdisk -l /dev/sda
 4  sudo partprobe /dev/sda
 5  sudo apt-cache search partprobe
 6  sudo apt-get install parted
 7  sudo partprobe /dev/sda
 8  sudo ls /dev/sda3
 9  sudo pvcreate /dev/sda3
10  sudo vgdisplay --columns
11  sudo vgextend CRIN4-vg /dev/sda3
12  sudo vgdisplay --columns
13  sudo lvdisplay
14  sudo lvextend -l 100%FREE /dev/CRIN4-vg/root
15  sudo vgdisplay --columns
16  sudo lvresize -l +100%FREE /dev/CRIN4-vg/root
17  mount 
18  sudo resize2fs /dev/CRIN4-vg/root 
19  df -hP

And the result:

df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/dm-0        31G  9.9G   20G  34% /
udev             10M     0   10M   0% /dev
tmpfs           402M   21M  382M   6% /run
tmpfs          1005M   92K 1005M   1% /dev/shm
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs          1005M     0 1005M   0% /sys/fs/cgroup
/dev/sda1       236M   33M  191M  15% /boot

[russell]

Thanks Chris,

I'm going to set the big DB sync going now to get dev. in sync with live.

All the best,
Russell



On 17/03/2017 14:42, CRIN Trac wrote:
> #103: Upgrade CRIN4 to 2GB of RAM
> ------------------------------------+-----------------------------------
>                   Reporter:  chris   |                Owner:  chris
>                       Type:  defect  |               Status:  closed
>                   Priority:  major   |            Milestone:  Maintenance
>                  Component:  crin4   |              Version:
>                 Resolution:  fixed   |             Keywords:
> Estimated Number of Hours:  0       |  Add Hours to Ticket:  0
>                  Billable?:  1       |          Total Hours:  0.3
> ------------------------------------+-----------------------------------
> Changes (by chris):
>
>   * status:  new => closed
>   * resolution:   => fixed
>
>
> --
> Ticket URL: <https://trac.crin.org.archived.website/trac/ticket/103#comment:4>
> CRIN Trac <https://trac.crin.org.archived.website/trac>
> Trac project for CRIN website and servers.