Відео

yes

This is required for quorum disk. If you have physical server with remote power management, you can use that (e.g. HP servers with iLO).

Glad you liked it

Not yet. Also I did not put much effort on ISCSI as it is going to retire from Ceph..

@@TrichTechInstitute What will be the alternative to use instead of iscsi?

@@skawashkar it will be NVME-of docs.ceph.com/en/latest/rbd/nvmeof-overview/

@@TrichTechInstitute Is it possible to configure multiple RDB pools is the iscsi-gateway.cfg? Because when I add multiple pools the rdb-gateway-api service crashes and fails to start.

Hi Ankit, I don't have any video or doc prepared for this scenario. Quick google search provided me below blog. You can check this. Usually you need RBD+ISCSI gateway for this. Please note, Ceph is going to drop support for ISCSI-gw. blogs.ovirt.org/2021/07/using-ceph-only-storage-for-ovirt-datacenter/

@@TrichTechInstitute Thanks for your response but that link tutorial did not work for me.

Do you have enough resource available on the node? Like sufficient RAM and CPU? If not, then your nodes can hang.

Thanks for your feedback and glad to know it helped you.

Hello, Please share your concerns so that I can help you

You need to create only on the bootstrap node.

Thanks

Did you ever find the answer to this?

Hello, I don't have any video ready for the data migration. I need to prepare one. Please stay tuned.

If you want to setup lab you can create a free account and can download suse evolution pack which will be valid for 2-6months. Else you can use Opensuse, which is free alternative of Suse.

Thanks for the feedback.

Qdevice is the quorum disk. If you check the installation video, I have shown there. It is a small shared disk which is available on all the cluster nodes for fencing the node. Usually in a production you need to have 3 quorum disks to avoid single point of failure.

@@TrichTechInstitute I have configured the shared disk bht still after entering a virtual IP it ask for qdevice and its address, here m confused what go provide.

@@tanmaykanungo2051 Are you following my video and getting this requirement? For what you need virtual IP? I guess you can skip the qdevice section.

@@TrichTechInstitute cool, I will skip it for now. Thanks for the tutorial.

@@tanmaykanungo2051 👌

Client means here the nodes which connects to the Ceph cluster. They will have a package called ceph-common installed on them to connect to the ceph cluster (e.g. via cephfs or RBD, connecting via S3 API of RGW doesn't need ceph-common ). Once you upgrade the ceph cluster, you need to upgrade the ceph-common package also on the same version on these clients and also on the admin node where you run various ceph commands.

@@TrichTechInstitute is there a way that we can chat in private?

@@cyberzeus1 you can ping on connect.trichtech@gmail.com

Can you please let me know what you did not understand?

This depends on your use case. You can use these NVMEs as DB/WAL device and HDDs as block device for the OSDs. Or you can create OSDs on these NVMEs along with the HDDs. Then create CRUSH rule to use these NVMEs for production/high performance pool and the HDDs for backup/nonprod data pools. Both are doable.

Is there a way to add the OSD from ceph GUI?

@@HarikaChintapally you can add. But before that please ensure the disk is cleaned up. If it has PV/VG/LV from previous OSD, then ceph will not create the OSD. You need to zap the device first or clean up those LV/VG/PV on the disk manually and then try to add it back. Also you can check `ceph orch device ls` output to see if the disk is showing there or not and if showing then whether it is showing as available or not. If not showing or not showing as available, then you will not be able to create the OSD. Hope this helps to add back the OSD.

Are you coping the ssh key from the cephadm shell? You need to copy it from cephadm shell. Also from the error message looks like you are not providing the command correctly. "TypeError: __init__() missing 2 required positional arguments: 'hostname' and 'addr'"

You need to follow below steps: 1. Copy the ssh pub key from the bootstrap node # ssh-copy-id -f -i /etc/ceph/ceph.pub root@*<new-host>* 2. Try performing ssh from cephadm shell, you need to do this to accept the ssh key 3. Now try to add the host # ceph orch host add host1 10.10.10.20 You should be able to add the host now.

@@TrichTechInstitute Thanks man it's works

@@Jeverson_Siqueira Glad to help you.

@@Jeverson_Siqueira you build all in one ceph right?

Hi Yogita, did you create PV, VG and LV already on the disks or do they have old LVM or filesystem on the disks?

Hello Yashwant, Try to execute the command with full path, e.g. `/usr/bin/airflow users list` and see whether it is returning any output.

Hello Amila, Sure, I am working on the tutorial for that. It will take sometime.

I will check the video and CC.

Welcome 👍

Please let me know what kind of specs you are looking for?

Is the entire host is down or only the osd down? Did you check for any possible hardware failure?

Thanks

You can download from this link github.com/nmonvisualizer/nmonvisualizer/releases/download/2021-04-04/NMONVisualizer_2021-04-04.jar

What information you want to capture?

Sure.. That is my upcoming video..

Here is the link for the CRUSH rule creation ua-cam.com/video/nTEbMPvqK5o/v-deo.html

Glad you liked it!

Are you asking to installation method on a disconnected environment?

@@TrichTechInstitute yes. I tried it but I am able to up only 1 node and I can't able to add osd from other nodes

@@yegnasivasai You need to create a local container registry so that the nodes can download the images from there... I will try to prepare a video for this. Are you trying it on Community edition or Red Hat Ceph storage?

@@TrichTechInstitute Community edition. I did set up local registry. But i am not able to up three node cluster

@@yegnasivasai did you check the registry connectivity from each node? Also did you setup passwordless authentication to the nodes from the bootstrap node?

Thank you, I will

Thank you!

Sure, I will

I have added it from KVM virtual machine manager console..