Backing up file systems on Oracle Exadata compute can be a daunting task if you are unaware of the prerequisites and best practices. To help you backup your file systems effectively and with least discrepancies, we are bringing you this interesting step-by-step guide on how to back up your file system using Oracle Exadata Sanpshot Based Backup of Compute Node to NFS Share

It is very important to take file system backup on Oracle Exadata compute nodes before we make any major changes to the operating system or critical software. On Oracle Exadata Compute nodes / (root) and /u01 file systems contains the operating system and GI/DB software respectively. These are the most critical file systems on Oracle Exadata computes.

By default, the / (root) and /u01 file system are sized 30GB and 100GB respectively.

Scenarios in which we must take file system backup are:

– Operating System Patching or Upgrade
– Grid Infrastructure Patching or Upgrade
– Database Patching or Upgrade
– Operating System configuration changes
– Increasing/decreasing file system size

In this article, we will demonstrate how to backup file system on Oracle Exadata Compute nodes running Linux Operating System to external storage NFS Share.

Environment Details

Exadata Model	X4-2 Half Rack HP 4 TB
Exadata Components	4 – Compute nodes, 7 – Storage cells & 2 – IB switches
Exadata Storage cells	DBM01CEL01 – DBM01CEL07
Exadata Compute nodes	DBM01DB01 – DBM01DB04
Exadata Software Version	19.2.3.0
Exadata DB Version	11.2.0.4.180717

Prerequisites

– Root user access on Compute nodes
– NFS mount with sufficient storage to storing file system backup

Current root and /u01 file system sizes

[root@ip01db01 ~]# df -h / /u01

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/VGExaDb-LVDbSys1 59G 39G 18G 70% /

/dev/mapper/VGExaDb-LVDbOra1 197G 171G 17G 92% /u01

NFS share details

10.10.10.1:/nfs/backup/

1. As root user, log in to the Exadata Compute node you wish to backup

[root@ip01db01 ~]# id root

uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)

2. Create a mount point to mount NFS share

[root@dm01db01 ~]# mkdir -p /mnt/backup

[root@dm01db01 ~]# mount -t nfs -o rw,intr,soft,proto=tcp,nolock 10.10.10.1:/nfs/backup/ /mnt/backup

3. Determine the file system type extension root and u01 file system

[root@ip01db01 ~]# mount -l

sysfs on /sys type sysfs (rw,relatime)

proc on /proc type proc (rw,relatime)

devtmpfs on /dev type devtmpfs (rw,nosuid,size=131804372k,nr_inodes=32951093,mode=755)

securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)

tmpfs on /dev/shm type tmpfs (rw,size=264225792k)

/dev/mapper/VGExaDb-LVDbSys1 on / type ext3 (rw,relatime,errors=continue,barrier=1,data=ordered) [DBSYS]

/dev/mapper/VGExaDb-LVDbOra1 on /u01 type ext3 (rw,nodev,relatime,errors=continue,barrier=1,data=ordered) [DBORA]

/dev/sda1 on /boot type ext3 (rw,nodev,relatime,errors=continue,barrier=1,data=ordered) [BOOT]

4. Note down the file system type for root and /u01: ext3. Take a snapshot-based of the root and u01 directories, Label the snapshot and Mount the snapshot

[root@dm01db01 ~]# lvcreate -L5G -s -n root_snap /dev/VGExaDb/LVDbSys1

Logical volume “root_snap” created.

[root@dm01db01 ~]# lvcreate -L5G -s -n u01_snap /dev/VGExaDb/LVDbOra1

Logical volume “u01_snap” created.

[root@dm01db01 ~]# e2label /dev/VGExaDb/root_snap DBSYS_SNAP

[root@dm01db01 ~]# e2label /dev/VGExaDb/u01_snap DBORA_SNAP

[root@dm01db01 ~]# mkdir -p /mnt/snap/root

[root@dm01db01 ~]# mkdir -p /mnt/snap/u01

[root@dm01db01 ~]# mount /dev/VGExaDb/root_snap /mnt/snap/root -t ext3

[root@dm01db01 ~]# mount /dev/VGExaDb/u01_snap /mnt/snap/u01 -t ext3

[root@dm01db01 ~]# df -h /mnt/snap/root

[root@dm01db01 ~]# df -h /mnt/snap/u01

5. Change to the directory for the backup and Create the backup file

[root@dm01db01 ~]# cd /mnt/backup

[root@dm01db01 ~]# tar -pjcvf /mnt/backup/mybackup.tar.bz2 * /boot –exclude /mnt/backup/mybackup.tar.bz2 > /tmp/backup_tar.stdout 2> /tmp/backup_tar.stderr

6. Monitor the /tmp/backup_tar.stderr file for errors. Errors such as failing to tar open sockets can be ignored.

7. Unmount the snapshots and remove the snapshots for the root and /01 directories.

[root@dm01db01 ~]# cd /

[root@dm01db01 /]# umount /mnt/snap/u01

[root@dm01db01 /]# umount /mnt/snap/root

[root@dm01db01 /]# df -h /mnt/snap/u01

[root@dm01db01 /]# df -h /mnt/snap/root

[root@dm01db01 /]# ls -l /mnt/snap

[root@dm01db01 /]# rm -rf /mnt/snap

[root@dm01db01 /]# lvremove /dev/VGExaDb/u01_snap

Do you really want to remove active logical volume u01_snap? [y/n]: y

Logical volume “u01_snap” successfully removed

[root@dm01db01 /]# lvremove /dev/VGExaDb/root_snap

Do you really want to remove active logical volume root_snap? [y/n]: y

Logical volume “root_snap” successfully removed

8. Unmount the NFS share

[root@dm01db01 /] umount /mnt/backup

Repeat the above steps on the remaining compute nodes to backup root & u01 file system

We hope this article helps you smoothly backup your file system on Oracle Exadata Compute node running Oracle Linux using NFS Share. Stay tuned for more step-by-step guides on implementing and using Oracle Database Systems exclusively on Netsoftmate

Netsoftmate provides the best standard services when it comes to Oracle databases management, covering all comples database products. Sign-up for a free 30 minutes call by clicking on the link below –

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Uncategorized

Creating A New File System on Exadata Compute Node

By Netsoftmate on

January 15, 2019

- Uncategorized

When the Exadata Database Machine is installed by Oracle ACS, you will see the following default file system created:

/
/dev/shm
/boot
/u01

There is a plenty of space available in the volume group and this can be used to increase the existing
file system size or you can create a new file system.

In this article we will demonstrate how to create a new file system (named /u02) on Exadata Compute
node.

Connect to the compute node as root user

List the exisint file system on Exadata Compute node

[root@dm01db01 ~]# df -h
Filesystem            Size Used Avail Use% Mounted on
/dev/mapper/VGExaDb-LVDbSys1
                       59G   38G   19G 67% /
tmpfs                 252G 6.0M 252G   1% /dev/shm
/dev/sda1             480M   63M 393M 14% /boot
/dev/mapper/VGExaDb-LVDbOra1
                      197G   97G   91G 52% /u01

Get the free space available in the volume group

[root@dm01db01 ~]# vgdisplay | grep Free
Free PE / Size 337428 / 1.29 TiB

List the physical volumes and logical volumes

[root@dm01db01 ~]# pvs
PV         VG      Fmt Attr PSize   PFree
/dev/sda2 VGExaDb lvm2 a–u 557.36g 202.36g
/dev/sda3 VGExaDb lvm2 a–u   1.09t   1.09t

[root@dm01db01 ~]# lvs
LV                 VG      Attr       LSize   Pool Origin   Data% Meta% Move Log Cpy%Sync Convert
LVDbOra1           VGExaDb owi-aos— 200.00g
LVDbSwap1          VGExaDb -wi-ao—- 24.00g
LVDbSys1           VGExaDb owi-aos— 60.00g
LVDbSys2           VGExaDb -wi-a—– 60.00g
LVDoNotRemoveOrUse VGExaDb -wi-a—–   1.00g
root_snap          VGExaDb swi-I-s—   5.00g      LVDbSys1 100.00
u01_snap           VGExaDb swi-I-s—   5.00g      LVDbOra1 100.00

Create a new logical volume of your desired size. Here we are creating a logical volume of 100GB size

[root@dm01db01 ~]# lvcreate -L100GB -n LVDbOra2 VGExaDb
Logical volume “LVDbOra2” created.

List the logical volumes and ensure our new logical volume is displayed

[root@dm01db01 ~]# lvs
LV                 VG      Attr       LSize   Pool Origin   Data% Meta% Move Log Cpy%Sync Convert
LVDbOra1           VGExaDb owi-aos— 200.00g
LVDbOra2           VGExaDb -wi-a—– 100.00g
LVDbSwap1          VGExaDb -wi-ao—- 24.00g
LVDbSys1           VGExaDb owi-aos— 60.00g
LVDbSys2           VGExaDb -wi-a—– 60.00g
LVDoNotRemoveOrUse VGExaDb -wi-a—–   1.00g
root_snap          VGExaDb swi-I-s—   5.00g      LVDbSys1 100.00
u01_snap           VGExaDb swi-I-s—   5.00g      LVDbOra1 100.00

Now create the new file system as shown below

[root@dm01db01 ~]# mkfs.ext3 -j -L u02 /dev/VGExaDb/LVDbOra2
mke2fs 1.43-WIP (20-Jun-2013)
Filesystem label=u02
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
6553600 inodes, 26214400 blocks
1310720 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
800 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

Mount the new file system

[root@dm01db01 ~]# mkdir /u02

[root@dm01db01 ~]# mount -t ext3 /dev/VGExaDb/LVDbOra2 /u02

Verify that the new file system is mounted and accessible

[root@dm01db01 ~]# df -kh
Filesystem            Size Used Avail Use% Mounted on
/dev/mapper/VGExaDb-LVDbSys1
                       59G   38G   19G 67% /
tmpfs                 252G 6.0M 252G   1% /dev/shm
/dev/sda1             480M   63M 393M 14% /boot
/dev/mapper/VGExaDb-LVDbOra1
                      197G   97G   91G 52% /u01
/dev/mapper/VGExaDb-LVDbOra2
                       99G   60M   94G   1% /u02

Conclusion
In this article we have learned how to create a new file system on Exadata Compute node using the free space available in the volume group.

eBook - Oracle Exadata X8M Patching Recipes | Netsoftmate

Exadata – Display and Clear Fault using Fault Manager (faultmgmt)

By Netsoftmate on

August 20, 2018

- Uncategorized

Exadata Database Machine consists of a storage grid, compute grid, and network grid. Each grid, or hardware layer, is built with multiple high-performing, industry-standard Oracle servers to provide hardware and system fault tolerance. The hardware components are subjected to failure. Most common failure on Exadata is Hard Disk failure on Storage Cells. With the latest generation of Exadata the hardware failures are very minimal and less troublesome.

The Exadata Storage Cells and Compute nodes consists of several hardware components, such as:

Hard disk
Flash disk
Physical Memory
Processor
IB ports
Mother Board
Batteries
Power Supply
and So on

In this article we will demonstrate how to view the hardware fault and clear it using ILOM fault manager (faultmgmt).

Steps to display and clear hardware fault using faultmgmt:

Step 1: Login to compute node ILOM where the fault occurred

[root@dm01db01 ~]# ssh dm01db02-ilom
Password:

Oracle(R) Integrated Lights Out Manager

Version 4.0.0.24 r121523

Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

Warning: HTTPS certificate is set to factory default.

Hostname: dm01db02-ilom

Step 2: Check if the fault manager is supported. If you get the output like below then fault manager is supported.

-> show /SP/faultmgmt/shell

/SP/faultmgmt/shell
Targets:

Properties:

Commands:
cd
show
start

Step 3: Start the fault manager shell

-> start /SP/faultmgmt/shell
Are you sure you want to start /SP/faultmgmt/shell (y/n)? y

Step 4: Execute the following command to display the fault. Here we can see that there is no issue with hardware but he ILOM file system is 100% full.

faultmgmtsp> fmadm faulty
——————- ———————————— ————– ——–
Time UUID msgid Severity
——————- ———————————— ————– ——–
2018-06-17/15:55:32 2a854ad2-4a31-e829-e26c-c84ba212d7f2 ILOM-8000-JV Major

Problem Status : open
Diag Engine : fdd 1.0
System
Manufacturer : Oracle Corporation
Name : Exadata X5-2
Part_Number : Exadata X5-2
Serial_Number : AK00XXXXXX

System Component
Manufacturer : Oracle Corporation
Name : ORACLE SERVER X5-2
Part_Number : 7090664
Serial_Number : 15XXXXXXXX
Firmware_Manufacturer : Oracle Corporation
Firmware_Version : (ILOM)4.0.0.24
Firmware_Release : (ILOM)2017.09.23

—————————————-
Suspect 1 of 1
Problem class : defect.ilom.fs.full
Certainty : 100%
Affects : /SYS/SP
Status : faulted

FRU
Status : faulty
Location : /SYS/SP
Manufacturer : Oracle Corporation
Name : SP
Part_Number : PILOT3
Chassis
Manufacturer : Oracle Corporation
Name : ORACLE SERVER X5-2
Part_Number : 7090664
Serial_Number : 1547NM10CX

Description : An ILOM filesystem has exceeded the filesystem capacity
limit.

Response : The chassis wide service-required LED will be illuminated.

Impact : ILOM commands may fail, especially those which make
configuration changes.

Action : Please refer to the associated reference document at
http://support.oracle.com/msg/ILOM-8000-JV for the latest
service procedures and policies regarding this diagnosis.

Step 5: Execute the below command to clear the fault

faultmgmtsp> fmadm acquit UUID –> Get the UUID from the from output of the above command.

faultmgmtsp> fmadm acquit 2a854ad2-4a31-e829-e26c-c84ba212d7f2

Step 6: Verify that the fault is cleared

faultmgmtsp> fmadm faulty
No faults found

Step 7: Exit from the fault manager

faultmgmtsp> exit

Step 8: Reset the ILOM service processor

-> reset /SP
Are you sure you want to reset /SP (y/n)? y
Performing reset on /SP

Step 9: Exit from the ILOM

-> exit
Connection to dm01db02-ilom closed.

Step 10: Connec to ILOM and verify the ILOM SP is restarted

[root@dm01db01 ~]# ssh dm01db02-ilom
Password:

Oracle(R) Integrated Lights Out Manager

Version 4.0.0.24 r121523

Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

Warning: HTTPS certificate is set to factory default.

Hostname: dm01db02-ilom

-> show -d properties /SP/clock uptime

/SP/clock
Properties:
uptime = 0 days, 00:08:02

Conclusion

In this article we have learned how to display and clear a fault using fault manager (faultmgmt). The Fault Management Shell is the preferred method for displaying the details of a diagnosed fault. faultmgmt support for command shell varies depending ILOM release level and server product model.

ASRexacheck Utility – Validate Exadata Oracle ASR Deployment

By Netsoftmate on

June 6, 2018

- Uncategorized

ASRexacheck utility can be executed to verify the ASR deployment. Oracle Auto Service Request (ASR) is a secure, scalable, customer-installable software feature of warranty and Oracle Support Services that provides auto-case generation when common hardware component faults occur.

It is important to note that, ASR is not a system management or monitoring tool. It is developed & designed to open Oracle Automatic Service Requests when specific hardware faults are detected on Oracle products that are qualified for ASR. Oracle Exadata Database Machine is a qualified production for Oracle ASR.

You can execute ASRexacheck in any of the following 2 ways:

As part of the Oracle Exadata Database Machine exachk
Stand-alone mode on a single node or multiple nodes

In this article we will demonstrate how to execute ASRexacheck on in Stand-alone mode on a single server and mutliple servers using dcli.

Ensure that the ASRexacheck verison is 4.x. If is is older than 4.x, then download the latest ASRexacheck from the MOS note below.

Engineered Systems ASR Configuration Check tool (asrexacheck version 4.x) (Doc ID 2103715.1)

ASRexacheck Download and & Upgrade steps

Download the asrexacheck zip file from the MOS note.
Copy the asrexacheck zip to the following directory: /opt/oracle.SupportTools/
Unzip the asrexacheck utility

# cd /opt/oracle.SupportTools/

# unzip asrexacheck_43.zip

Change the running permissions to execute

# chmod 755 /opt/oracle.SupportTools/asrexacheck

Verify the asrexacheck version

# /opt/oracle.SupportTools/asrexacheck –v

ASRexacheck execution On a single Exadata server

[root@dm01db01 oracle.SupportTools]# /opt/oracle.SupportTools/asrexacheck
asrexacheck version: 4.0
Current time: 2018-04-09 10:42:51

================================================================================
SYSTEM CONFIGURATION
================================================================================
Product name : Exadata X5-2
Product serial : AK003XXXXX
Component name : ORACLE SERVER X5-2
Component serial : 1546XX111X
Engineered System type : Exadata
Server type : COMPUTE
Image version : 18.1.4.0.0.180125.3
OS IP Address : 10.10.10.1
OS Hostname : dm01db01
OS version : 4.1.12-94.7.8.el6uek.x86_64
ILOM IP Address : 10.10.10.14
ILOM Hostname : dm01db01-ilom
ILOM version : 4.0.0.24

================================================================================
NETWORK
================================================================================
Interface IP Address Hostname Route fromIP
——————————————————————————–
bondeth0 10.20.16.1 dm0101 NO
eth0 10.10.10.1 dm01db01 YES

================================================================================
ASR
================================================================================
Destination Hostname Rule Type DBMCLI Port Level Community Version
——————————————————————————–
10.10.10.1 dm01db01 1 8162 minor LocalMSV3user 3
192.168.10.1 oragwserver YES 162 public
192.168.10.1 oragwserver 2 162 minor public 2c

[OK] Exactly one OS and ILOM IP coincide (192.168.10.1)
* Validation:
[OK] OS Test event sent to 192.168.10.1:162
[OK] ILOM Test event sent to 192.168.10.1:162

Time elapsed script execution: 00:04:44
Zipfile /var/log/asrexacheck/asrexacheck_dm01db01_20180409T154251.zip of the outputs created

ASRexacheck execution on all Exadata Compute nodes

[root@dm01db01 oracle.SupportTools]# dcli -g ~/dbs_group -l root ‘/opt/oracle.SupportTools/asrexacheck’
dm01db01: asrexacheck version: 4.0
dm01db01: Current time: 2018-04-09 10:42:51
dm01db01:
dm01db01: ================================================================================
dm01db01: SYSTEM CONFIGURATION
dm01db01: ================================================================================
dm01db01: Product name : Exadata X5-2
dm01db01: Product serial : AK003XXXXX
dm01db01: Component name : ORACLE SERVER X5-2
dm01db01: Component serial : 1546XX111X
dm01db01: Engineered System type : Exadata
dm01db01: Server type : COMPUTE
dm01db01: Image version : 18.1.4.0.0.180125.3
dm01db01: OS IP Address : 10.10.10.1
dm01db01: OS Hostname : dm01db01
dm01db01: OS version : 4.1.12-94.7.8.el6uek.x86_64
dm01db01: ILOM IP Address : 10.10.10.14
dm01db01: ILOM Hostname : dm01db01-ilom
dm01db01: ILOM version : 4.0.0.24
dm01db01:
dm01db01: ================================================================================
dm01db01: NETWORK
dm01db01: ================================================================================
dm01db01: Interface IP Address Hostname Route fromIP
dm01db01: ——————————————————————————–
dm01db01: bondeth0 10.20.16.1 dm0101 NO
dm01db01: eth0 10.10.10.1 dm01db01 YES
dm01db01:
dm01db01: ================================================================================
dm01db01: ASR
dm01db01: ================================================================================
dm01db01: Destination Hostname Rule Type DBMCLI Port Level Community Version
dm01db01: ——————————————————————————–
dm01db01: 10.10.10.1 dm01db01 1 8162 minor LocalMSV3user 3
dm01db01: 192.168.10.1 oragwserver YES 162 public
dm01db01: 192.168.10.1 oragwserver 2 162 minor public 2c
dm01db01:
dm01db01: [OK] Exactly one OS and ILOM IP coincide (192.168.10.1)
dm01db01: * Validation:
dm01db01: [OK] OS Test event sent to 192.168.10.1:162
dm01db01: [OK] ILOM Test event sent to 192.168.10.1:162
dm01db01:
dm01db01: Time elapsed script execution: 00:04:44
dm01db01: Zipfile /var/log/asrexacheck/asrexacheck_dm01db01_20180409T154251.zip of the outputs created
dm01db02: asrexacheck version: 4.0
dm01db02: Current time: 2018-04-09 10:42:51
dm01db02:
dm01db02: ================================================================================
dm01db02: SYSTEM CONFIGURATION
dm01db02: ================================================================================
dm01db02: Product name : Exadata X5-2
dm01db02: Product serial : AK003XXXXX
dm01db02: Component name : ORACLE SERVER X5-2
dm01db02: Component serial : 1546XX11XX
dm01db02: Engineered System type : Exadata
dm01db02: Server type : COMPUTE
dm01db02: Image version : 18.1.4.0.0.180125.3
dm01db02: OS IP Address : 10.10.10.2
dm01db02: OS Hostname : dm01db02
dm01db02: OS version : 4.1.12-94.7.8.el6uek.x86_64
dm01db02: ILOM IP Address : 10.10.10.15
dm01db02: ILOM Hostname : dm01db02-ilom
dm01db02: ILOM version : 4.0.0.24
dm01db02:
dm01db02: ================================================================================
dm01db02: NETWORK
dm01db02: ================================================================================
dm01db02: Interface IP Address Hostname Route fromIP
dm01db02: ——————————————————————————–
dm01db02: bondeth0 10.20.16.3 dm0102 NO
dm01db02: eth0 10.10.10.2 dm01db02 YES
dm01db02:
dm01db02: ================================================================================
dm01db02: ASR
dm01db02: ================================================================================
dm01db02: Destination Hostname Rule Type DBMCLI Port Level Community Version
dm01db02: ——————————————————————————–
dm01db02: 10.10.10.2 dm01db02 1 8162 minor LocalMSV3user 3
dm01db02: 192.168.10.1 oragwserver YES 162 public
dm01db02: 192.168.10.1 oragwserver 2 162 minor public 2c
dm01db02:
dm01db02: [OK] Exactly one OS and ILOM IP coincide (192.168.10.1)
dm01db02: * Validation:
dm01db02: [OK] OS Test event sent to 192.168.10.1:162
dm01db02: [OK] ILOM Test event sent to 192.168.10.1:162
dm01db02:
dm01db02: Time elapsed script execution: 00:04:46
dm01db02: Zipfile /var/log/asrexacheck/asrexacheck_dm01db02_20180409T154251.zip of the outputs created
dm01db03: asrexacheck version: 4.0
dm01db03: Current time: 2018-04-09 10:42:51
dm01db03:
dm01db03: ================================================================================
dm01db03: SYSTEM CONFIGURATION
dm01db03: ================================================================================
dm01db03: Product name : Exadata X5-2
dm01db03: Product serial : AK003XXXXX
dm01db03: Component name : ORACLE SERVER X5-2
dm01db03: Component serial : 1547XX10XX
dm01db03: Engineered System type : Exadata
dm01db03: Server type : COMPUTE
dm01db03: Image version : 18.1.4.0.0.180125.3
dm01db03: OS IP Address : 10.10.10.3
dm01db03: OS Hostname : dm01db03
dm01db03: OS version : 4.1.12-94.7.8.el6uek.x86_64
dm01db03: ILOM IP Address : 10.10.10.16
dm01db03: ILOM Hostname : dm01db03-ilom
dm01db03: ILOM version : 4.0.0.24
dm01db03:
dm01db03: ================================================================================
dm01db03: NETWORK
dm01db03: ================================================================================
dm01db03: Interface IP Address Hostname Route fromIP
dm01db03: ——————————————————————————–
dm01db03: bondeth0 10.20.16.5 dm0103 NO
dm01db03: eth0 10.10.10.3 dm01db03 YES
dm01db03:
dm01db03: ================================================================================
dm01db03: ASR
dm01db03: ================================================================================
dm01db03: Destination Hostname Rule Type DBMCLI Port Level Community Version
dm01db03: ——————————————————————————–
dm01db03: 10.10.10.3 dm01db03 1 8162 minor LocalMSV3user 3
dm01db03: 192.168.10.1 oragwserver YES 162 public
dm01db03: 192.168.10.1 oragwserver 2 162 minor public 2c
dm01db03:
dm01db03: [OK] Exactly one OS and ILOM IP coincide (192.168.10.1)
dm01db03: * Validation:
dm01db03: [OK] OS Test event sent to 192.168.10.1:162
dm01db03: [OK] ILOM Test event sent to 192.168.10.1:162
dm01db03:
dm01db03: Time elapsed script execution: 00:04:43
dm01db03: Zipfile /var/log/asrexacheck/asrexacheck_dm01db03_20180409T154251.zip of the outputs created

At the end of successful ASRexacheck execution, you will receive 2 Test ASR emails, one from Management host and another from Management ILOM host. If you don’t receive the Test ASR emails then you must work with Oracle ASR Management team to resolve the ASR Manager issue.

You can also execute ASRexacheck on Exadata Storage cells using below commands.

[root@dm01cel01 ~]# /opt/oracle.SupportTools/asrexacheck
[root@dm01db01 ~]# dcli -g ~/cell_group -l root ‘/opt/oracle.SupportTools/asrexacheck’

Conclusion

In this article we have learned how to verify ASR deployment using ASRexacheck utility. ASR is not a monitoring tool, it is designed to open ASR when specific hardware faults are detected on Oracle products that are qualified for ASR. Oracle Exadata Database Machine is a qualified production for Oracle ASR.

Exadata Setup SSH Equivalence

By Netsoftmate on

May 20, 2018

- Uncategorized

You want to execute Operating System or Exadata commands on multiple Exadata Compute nodes and Storage Cell in parallel. To accomplish this you must setup passwordless SSH across compute nodes and storage cells.

If SSH equivalence is NOT setup and you execute the dcli command you will see the follow messages. This mean the SSH equivalence is not configured.

[root@dm01db01 ~]# dcli -g dbs_group -l root ‘uptime’
The authenticity of host ‘dm01db03 (10.10.10.195)’ can’t be established.
RSA key fingerprint is 40:81:3c:6d:ef:e7:1f:d7:a0:df:eb:f5:ea:92:a5:db.
Are you sure you want to continue connecting (yes/no)? The authenticity of host ‘dm01db05 (10.10.10.197)’ can’t be established.
RSA key fingerprint is 1b:95:47:0b:92:b4:13:9f:55:b7:a3:2a:56:27:9f:1c.
Are you sure you want to continue connecting (yes/no)? The authenticity of host ‘dm01db02 (10.10.10.194)’ can’t be established.
RSA key fingerprint is e1:0d:90:46:16:88:74:01:02:5a:11:90:63:b1:6b:1c.
Are you sure you want to continue connecting (yes/no)? The authenticity of host ‘dm01db01 (10.10.10.193)’ can’t be established.
RSA key fingerprint is 2b:6f:43:4b:86:29:bb:ed:a6:03:c5:34:75:cf:45:34.
Are you sure you want to continue connecting (yes/no)? The authenticity of host ‘dm01db04 (10.10.10.196)’ can’t be established.
RSA key fingerprint is 44:a7:ad:65:c3:1c:fb:0b:0b:28:2c:b6:a5:f3:59:99.
Are you sure you want to continue connecting (yes/no)? The authenticity of host ‘dm01db07 (10.10.10.199)’ can’t be established.
RSA key fingerprint is 25:5f:9a:e6:a4:7a:13:ba:e2:e7:7d:2e:79:53:49:2b.
Are you sure you want to continue connecting (yes/no)? root@dm01db06’s password: root@dm01db08’s password:

In this article we will demonstrate how to setup SSH equivalence on Exadata Database Machine.

Steps to Setup SSH Equivalence

1. Create the following files if doesn’t exist

[root@dm01db08 ~]# cat dbs_group
dm01db01
dm01db02
dm01db03
dm01db04
dm01db05
dm01db06
dm01db07
dm01db08

[root@dm01db08 ~]# cat cell_group
dm01cel01
dm01cel02
dm01cel03
dm01cel04
dm01cel05
dm01cel06
dm01cel07

[root@dm01db08 ~]# cat all_group
dm01db01
dm01db02
dm01db03
dm01db04
dm01db05
dm01db06
dm01db07
dm01db08
dm01cel01
dm01cel02
dm01cel03
dm01cel04
dm01cel05
dm01cel06
dm01cel07
dm01sw-iba01
dm01sw-ibb01

2. Navigate to Support directory on Compute node 1 as shown below

[root@dm01db01 ~]# cd /opt/oracle.SupportTools/

3. Oracle has provided a script *setup_ssh_eq.sh* to configure SSH equivalence across Exadata components. Execute the script as shown below. Here we are setting the SSH equivalence for root user

[root@dm01db01 oracle.SupportTools]# ./setup_ssh_eq.sh ~/all_group root welcome1

/root/.ssh/id_dsa already exists.

Overwrite (y/n)?

/root/.ssh/id_rsa already exists.

Overwrite (y/n)?

spawn dcli -c dm01db01 -l root -k

dm01db01: ssh key already exists