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[RHEL8] Configure Stonith Fence Devices In PCS Pacemaker Cluster |RHEL8 |Centos8

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5 сен 2024

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Комментарии : 19

@jackykwan6735 Год назад

Thanks ,this is a good video.

@suresh9250604856 2 года назад

Great Its working fine

@tunetolinux4173 2 года назад

Thank you.

@Filmyjaduu Год назад

Great Video friend.... it helps me a lot... pl help to configure oracle db on pacemaker cluster with failover with LVM

@stanlo45 Год назад

I see you used /dev/sdb as your device instead of uuid for the device. When I rebooted my nodes the scsi devices /dev/sda & /dev/sdb were swapped and my cluster wouldn't start because fencing was broken.

@minhduc6330 Год назад

Hello sir, do we need to create physical volume for both nodes or just 1 node is enough

@Nales 7 месяцев назад

Is the same procediment with multipath block devices? /dev/mapper/mpatha....

@weilin4872 6 месяцев назад

Hi , how to solve this error msg ''fence_sbd: power timeout needs to be greater then sbd message timeout' ?

@hemantsinghsolanki3047 3 года назад

You didn't mention that how did you set up shared storage?

@davidchang5862 3 года назад

Hi. I don’t quite understand. Where is the shared storage in this context ? And why do u need to create fencing stonith 2 times when it should be 1 ?

@tunetolinux4173 3 года назад

/Dev/sdb is the shared disk I am using for fence device. I have created only 1 stonith agent and that is enough.

@khznm2174 Год назад

why SBD device in same cluster nodes ?

@Ramkumar-pd5sv 2 года назад

what software you are using for taking ssh connection to server?

@tunetolinux4173 2 года назад

Mobaxterm

@luisgarciaaguilar7546 Год назад

Hello After restarting cluster, the sdb -d command only shows local server. I am sorry but i cant paste the output Can you figure out what's happening? Thanks

@tunetolinux4173 Год назад

Please watch the video again and follow exact steps I did. I will not able to comment without the error.

@luisgarciaaguilar7546 Год назад

@@tunetolinux4173 Thanks. I think the error is that /dev/sdb is a different disk in each VM. Can it be?

@vedagiribalaji3303 3 года назад

Please paste all the commands from notepad under description, it would be helpful

@tunetolinux4173 3 года назад

1. Install fence-agents-sbd package on both nodes. yum -y install sbd fence-agents-sbd 2. On node01, Initialize the disk and create sbd device. sbd -d /dev/sdb -4 20 -1 10 create 3. Check status of sbd device. sbd -d /dev/sdb dump ==Dumping header on disk /dev/sdb Header version : 2.1 UUID : 3a77e11e-f9ee-4f6c-bbd8-d8570cc1f694 Number of slots : 255 Sector size : 512 Timeout (watchdog) : 10 Timeout (allocate) : 2 Timeout (loop) : 1 Timeout (msgwait) : 20 ==Header on disk /dev/sdb is dumped 4. Enable software watchdog modprobe softdog echo softdog > /etc/modules-load.d/softdog.conf 5. Edit sbd configuration file and below two information on both the nodes. # edit sbd config /etc/sysconfig/sbd SBD_DEVICE="/dev/sdb" SBD_OPTS="-W" 6. Enable sbd service and restart cluster service. systemctl enable sbd pcs cluster stop --all pcs cluster start --all 7. List sbd devices. sbd -d /dev/sda list 0 clnode01 clear 1 clnode02 clear # get sbd status using fence_sbd, and then reboot node02 from node01 fence_sbd --devices=/dev/sdb -n clnode02 -o status fence_sbd --devices=/dev/sdb -n clnode02 -o reboot stonith_admin --reboot clnode02 8. Setup the fencing on pcs pcs stonith create fence-sbd fence_sbd devices="/dev/sdb" power_timeout=20 9. Test fence node with fence agent just created. pcs stonith fence clnode02 10. Check sbd device information. pcs stonith sbd status