Solaris & Scripting: zfs

Showing posts with label zfs. Show all posts

Nov 1, 2019

create zpool on existing directory with data

Create zpool on existing directory with data

APPLIES TO : Oracle SPARC Solaris

ISSUE : A directory contains a huge amount of data, due to disk space constrain we need to convert that data into zfs volume. The challenge is how to retain the file ownership, permission, and soft/hard links

GOAL : Create a zfs volume and move the local data with exact permission, ownership.

SOLUTION : There isn't a built-in or automated way to create a new DataSet and migrate existing data to it. To get it done you'll need to create the dataset and manually (e.g. rsync) the data to it.

Prerequisites : NIL

1. Move the data directory into a new name.
root@JUDI-DEV-10:/root # mv /oracle /oracle_org

2. Create a zpool volume with a the new disk
root@JUDI-DEV-10:/root # zpool create -f -m /oracle oracle c1d1

3. Copy the data to the zfs volume using the rsync command
root@JUDI-DEV-10:/root # rsync -aAX /oracle_org/ /oracle

4. Verify the permission and ownership once the copy completed
root@JUDI-DEV-10:/root # ls -rlt

create zpool with existing data directory
create zpool and sync with existing directory
zfs create dataset from existing directory
create zpool on existing directory with data
Proper way to create a zfs off an existing directory
ZFS: adding filesystem over existing directory
create ZFS dataset over existing data
converting existing directory to zfs dataset

Zfs create dataset from existing directory

Oct 13, 2019

solaris zpool zfs upgrade

Upgrading ZFS Storage Pools in Solaris 11.4

APPLIES TO : Oracle SPARC Solaris

ISSUE : The pool is formatted using an older on-disk format. The pool can still be used, but some features are unavailable.

GOAL :  Upgrading ZFS Storage Pools in Solaris 11.4

SOLUTION : Upgrade the zpool to latest version to avail all the features.

Prerequisites :

1. Check the zpool status to find the version.
root@JUDI-DEV-10:/root# zpool status
   pool: rpool
state: ONLINE
status: The pool is formatted using an older on-disk format. The pool can
   still be used, but some features are unavailable.
action: Upgrade the pool using 'zpool upgrade'. Once this is done, the
   pool will no longer be accessible on older software versions.
config:
   NAME STATE READ WRITE CKSUM
       rpool ONLINE 0 0 0
       mirror-0 ONLINE 0 0 0
       c0t6000CCA02A507030d0 ONLINE 0 0 0
       c0t6000CCA02A507984d0 ONLINE 0 0 0
errors: No known data errors
root@JUDI-DEV-10:/root#

2. Check the servers zpool software installed version and zpool volume is configured in which version.
root@JUDI-DEV-10:/root# zpool upgrade
This system is currently running ZFS pool version 45.

The following pools are out of date, and can be upgraded. After being
upgraded, these pools will no longer be accessible by older software versions.

VER POOL
--- ------------
44 rpool

Use 'zpool upgrade -v' for a list of available versions and their associated features.
root@JUDI-DEV-10:/root#

The Installed version of zpool version in OS is 45, The rpool volume is with version 44

3. List of available versions and their associated features..
root@JUDI-DEV-10:/root# zpool upgrade -v
This system is currently running ZFS pool version 45.
The following versions are supported:
VER DESCRIPTION
--- --------------------------------------------------------
1 Initial ZFS version
2 Ditto blocks (replicated metadata)
3 Hot spares and double parity RAID-Z
4 zpool history
5 Compression using the gzip algorithm
6 bootfs pool property
7 Separate intent log devices
8 Delegated administration
9 refquota and refreservation properties
10 Cache devices
11 Improved scrub performance
12 Snapshot properties
13 snapused property
14 passthrough-x aclinherit
15 user/group space accounting
16 stmf property support
17 Triple-parity RAID-Z
18 Snapshot user holds
19 Log device removal
20 Compression using zle (zero-length encoding)
21 Deduplication
22 Received properties
23 Slim ZIL
24 System attributes
25 Improved scrub stats
26 Improved snapshot deletion performance
27 Improved snapshot creation performance
28 Multiple vdev replacements
29 RAID-Z/mirror hybrid allocator
30 Encryption
31 Improved 'zfs list' performance
32 One MB blocksize
33 Improved share support
34 Sharing with inheritance
35 Sequential resilver
36 Efficient log block allocation
37 LZ4 compression
38 Xcopy with encryption
39 Resilver restart enhancements
40 New deduplication support
41 Asynchronous dataset destroy
42 Reguid: ability to change the pool guid
43 RAID-Z improvements and cloud device support
44 Device removal
45 Lazy deadlists
For more information on a particular version, including supported releases, see the ZFS Administration Guide.
root@JUDI-DEV-10:/root#

4. Upgrade the zpool version from 44 to 45 (The latest zpool version)
root@JUDI-DEV-10:/root# zpool upgrade rpool
This system is currently running ZFS pool version 45.
Successfully upgraded 'rpool' from version 44 to version 45
root@JUDI-DEV-10:/root#

5. Check the status of zpool version
root@JUDI-DEV-10:/root# zpool upgrade
This system is currently running ZFS pool version 45.
All pools are formatted using this version.

root@JUDI-DEV-10:/root#

~Judi~

Nov 9, 2018

Replace a ZFS Root Pool to another disk

APPLIES TO : Solaris 11.3 LDOM

ISSUE : Server is running in 100GB OS LUN, need to move the OS to another disk provided from another array.

GOAL : Replace a ZFS Root Pool with another disk, Move the OS LUN to the disk provided from another Storage Array

SOLUTION : Attach the secondary disk in zpool, boot the server in both disks, detach the primary disk.

EXAMPLE :

1. Verify the secondary disk c1d1 is visible in format output
  root@judi-dev-01:~# echo | format
  Searching for disks...done

  AVAILABLE DISK SELECTIONS:
     0. c1d0 <3PARdata-VV-3212-100.00GB>
        /virtual-devices@100/channel-devices@200/disk@0
     1. c1d1 <3PARdata-VV-3212-100.00GB>
      /virtual-devices@100/channel-devices@200/disk@1
  Specify disk (enter its number): Specify disk (enter its number):

  root@judi-dev-01:~#

2. Check the zpool list
  root@judi-dev-01:~# zpool list
  NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT
  rpool 99.5G 9.37G 90.1G 9% 1.00x ONLINE -

  root@judi-dev-01:~#

3. Check the zpool Status
  root@judi-dev-01:~# zpool status
      pool: rpool
     state: ONLINE
      scan: resilvered 7.37G in 30s with 0 errors on Thu Nov 8 11:51:10 2018

  config:

      NAME STATE READ WRITE CKSUM
      rpool ONLINE 0 0 0
      c1d0 ONLINE 0 0 0

  errors: No known data errors

  root@judi-dev-01:~#

4. Verify the bootdisk path (The server booted with disk@0)
  root@judi-dev-01:~# prtconf -vp | grep bootpath
        bootpath: '/virtual-devices@100/channel-devices@200/disk@0'

  root@judi-dev-01:~#

5. Attach the secondary disk c1d1 to zpool
  root@judi-dev-01:~# zpool attach rpool c1d0 c1d1
  Make sure to wait until resilver is done before rebooting.

  root@judi-dev-01:~#

6. Check the status of the pool, Wait till the resilvered completes
  root@judi-dev-01:~# zpool status
      pool: rpool
     state: ONLINE
      scan: resilvered 7.37G in 34s with 0 errors on Thu Nov 8 12:34:45 2018

  config:

      NAME STATE READ WRITE CKSUM
      rpool ONLINE 0 0 0
      mirror-0 ONLINE 0 0 0
      c1d0 ONLINE 0 0 0
      c1d1 ONLINE 0 0 0

  errors: No known data errors

  root@judi-dev-01:~#

7.   Apply the boot blocks after the new disk is resilvered
  root@judi-dev-01:~# bootadm install-bootloader

  root@judi-dev-01:~#

8.   Bring down the server to OK Prompt (OBP)
  {0} ok show-disks
  a) /reboot-memory@0
  b) /virtual-devices@100/channel-devices@200/disk@1

  c) /virtual-devices@100/channel-devices@200/disk@0

9.   Boot the server with secondary disk from OK Prompt (OBP) [Now server is booting with disk@1]
  {0} ok boot /virtual-devices@100/channel-devices@200/disk@1
  Boot device: /virtual-devices@100/channel-devices@200/disk@1 File and args:
  SunOS Release 5.11 Version 11.3 64-bit
  Copyright (c) 1983, 2018, Oracle and/or its affiliates. All rights reserved.

  Hostname: judi-dev-01

10. Verify the bootdisk path (The server should have booted through the secondary disk disk@1)
  root@judi-dev-01:~# prtconf -vp | grep bootpath
        bootpath: '/virtual-devices@100/channel-devices@200/disk@1'

  root@judi-dev-01:~#

IF YOU FACE ANY ISSUE IN BOOTING THE SERVER IN SECONDARY DISK THEN ROLL BACK THE CHANGE BY BOOTING THE SERVER WITH PRIMARY DISK
  /virtual-devices@100/channel-devices@200/disk@0

  FOLLOW THE BELOW PROCEDURE IF YOU THE SERVER BOOTS IN SECONDARY DISK WITHOUT ANY ISSUE.

11. Check the zpool Status
  root@judi-dev-01:~# zpool status
      pool: rpool
     state: ONLINE
      scan: resilvered 7.37G in 34s with 0 errors on Thu Nov 8 12:34:45 2018

  config:

        NAME STATE READ WRITE CKSUM
        rpool ONLINE 0 0 0
        mirror-0 ONLINE 0 0 0
        c1d0 ONLINE 0 0 0
        c1d1 ONLINE 0 0 0

  errors: No known data errors

  root@judi-dev-01:~#

12. Detach the old(primary) disk c1d0 from the pool, since the server is booting without any issue from the secondary disk.
  root@judi-dev-01:~# zpool detach rpool c1d0

  root@judi-dev-01:~#

13. Check the status of the zpool, the zpool contains only the secondary disk
  root@judi-dev-01:~# zpool status
      pool: rpool
     state: ONLINE
      scan: resilvered 7.37G in 34s with 0 errors on Thu Nov 8 12:34:45 2018

  config:

        NAME STATE READ WRITE CKSUM
        rpool ONLINE 0 0 0
        c1d1 ONLINE 0 0 0

  errors: No known data errors

  root@judi-dev-01:~#

14. reboot the server again to confirm the change is successful and the bootdisk path.
  root@judi-dev-01:~# prtconf -vp | grep bootpath
        bootpath: '/virtual-devices@100/channel-devices@200/disk@1'

  root@judi-dev-01:~#

Known Errors : You may be getting the below error while booting the server from secondary disk.
  {0} ok boot /virtual-devices@100/channel-devices@200/disk@1
  Boot device: /virtual-devices@100/channel-devices@200/disk@1 File and args:

  ERROR: Last Trap: Fast Data Access MMU Miss

After attaching the secondary disk you might have used the installboot command as below.
  installboot -F zfs /usr/platform/`uname -i`/lib/fs/zfs/bootblk /dev/rdsk/cwtxdys0
  This command is incorrect to use in this procedure,

  the correct caommnd to install the bootblock is
  bootadm install-bootloader

~Judi~

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