oVirt over gluster: Replacing a dead host
Hello all, I'm attempting to replace a dead host in a replica 2 + arbiter gluster setup and replace it with a new host. I've already set up a new host (same hostname..localdomain) and got into the cluster. $ gluster peer status Number of Peers: 2 Hostname: office-wx-hv3-lab-gfs Uuid: 4e13f796-b818-4e07-8523-d84eb0faa4f9 State: Peer in Cluster (Connected) Hostname: office-wx-hv1-lab-gfs.localdomain <------ This is a new host. Uuid: eee17c74-0d93-4f92-b81d-87f6b9c2204d State: Peer in Cluster (Connected) $ gluster volume info GV2Data Volume Name: GV2Data Type: Replicate Volume ID: c1946fc2-ed94-4b9f-9da3-f0f1ee90f303 Status: Stopped Snapshot Count: 0 Number of Bricks: 1 x (2 + 1) = 3 Transport-type: tcp Bricks: Brick1: office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick <------ This is the dead host. Brick2: office-wx-hv2-lab-gfs:/mnt/LogGFSData/brick Brick3: office-wx-hv3-lab-gfs:/mnt/LogGFSData/brick (arbiter) ... Looking at the docs, it seems that I need to remove the dead brick. $ gluster volume remove-brick GV2Data office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick start Running remove-brick with cluster.force-migration enabled can result in data corruption. It is safer to disable this option so that files that receive writes during migration are not migrated. Files that are not migrated can then be manually copied after the remove-brick commit operation. Do you want to continue with your current cluster.force-migration settings? (y/n) y volume remove-brick start: failed: Removing bricks from replicate configuration is not allowed without reducing replica count explicitly So I guess I need to drop from replica 2 + arbiter to replica 1 + arbiter (?). $ gluster volume remove-brick GV2Data replica 1 office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick start Running remove-brick with cluster.force-migration enabled can result in data corruption. It is safer to disable this option so that files that receive writes during migration are not migrated. Files that are not migrated can then be manually copied after the remove-brick commit operation. Do you want to continue with your current cluster.force-migration settings? (y/n) y volume remove-brick start: failed: need 2(xN) bricks for reducing replica count of the volume from 3 to 1 ... What am I missing? - Gilboa
What you are missing is the fact that gluster requires more than one set of bricks to recover from a dead host. I.e. In your set up, you'd need 6 hosts. 4x replicas and 2x arbiters with at least one set (2x replicas and 1x arbiter) operational bare minimum. Automated commands to fix the volume do not exist otherwise. (It's a Gluster limitation.) This can be fixed manually however. Standard Disclaimer: Back up your data first! Fixing this issue requires manual intervention. Reader assumes all responsiblity for any action resulting from the instructions below. Etc. If it's just a dead brick, (i.e. the host is still functional), all you really need to do is replace the underlying storage: 1. Take the gluster volume offline. 2. Remove the bad storage device, and attach the replacement. 3. rsync / scp / etc. the data from a known good brick (be sure to include hidden files / preserve file times and ownership / SELinux labels / etc. ). 4. Restart the gluster volume. Gluster *might* still need to heal everything after all of that, but it should start the volume and get it running again. If the host itself is dead, (and the underlying storage is still functional), you can just move the underlying storage over to the new host: 1. Take the gluster volume offline. 2. Attach the old storage. 3. Fix up the ids on the volume file. (https://serverfault.com/questions/631365/rename-a-glusterfs-peer) 4. Restart the gluster volume. If both the host and underlying storage are dead, you'll need to do both tasks: 1. Take the gluster volume offline. 2. Attach the new storage. 3. rsync / scp / etc. the data from a known good brick (be sure to include hidden files / preserve file times and ownership / SELinux labels / etc. ). 4. Fix up the ids on the volume file. 5. Restart the gluster volume. Keep in mind one thing however: If the gluster host you are replacing is used by oVirt to connect to the volume (I.e. It's the host named in the volume config in the Admin portal). The new host will need to retain the old hostname / IP, or you'll need to update oVirt's config. Otherwise the VM hosts will wind up in Unassigned / Non-functional status. - Patrick Hibbs On Sun, 2022-07-17 at 22:15 +0300, Gilboa Davara wrote:
Hello all,
I'm attempting to replace a dead host in a replica 2 + arbiter gluster setup and replace it with a new host. I've already set up a new host (same hostname..localdomain) and got into the cluster.
$ gluster peer status Number of Peers: 2
Hostname: office-wx-hv3-lab-gfs Uuid: 4e13f796-b818-4e07-8523-d84eb0faa4f9 State: Peer in Cluster (Connected)
Hostname: office-wx-hv1-lab-gfs.localdomain <------ This is a new host. Uuid: eee17c74-0d93-4f92-b81d-87f6b9c2204d State: Peer in Cluster (Connected)
$ gluster volume info GV2Data Volume Name: GV2Data Type: Replicate Volume ID: c1946fc2-ed94-4b9f-9da3-f0f1ee90f303 Status: Stopped Snapshot Count: 0 Number of Bricks: 1 x (2 + 1) = 3 Transport-type: tcp Bricks: Brick1: office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick <------ This is the dead host. Brick2: office-wx-hv2-lab-gfs:/mnt/LogGFSData/brick Brick3: office-wx-hv3-lab-gfs:/mnt/LogGFSData/brick (arbiter) ...
Looking at the docs, it seems that I need to remove the dead brick.
$ gluster volume remove-brick GV2Data office-wx-hv1-lab- gfs:/mnt/LogGFSData/brick start Running remove-brick with cluster.force-migration enabled can result in data corruption. It is safer to disable this option so that files that receive writes during migration are not migrated. Files that are not migrated can then be manually copied after the remove-brick commit operation. Do you want to continue with your current cluster.force-migration settings? (y/n) y volume remove-brick start: failed: Removing bricks from replicate configuration is not allowed without reducing replica count explicitly
So I guess I need to drop from replica 2 + arbiter to replica 1 + arbiter (?).
$ gluster volume remove-brick GV2Data replica 1 office-wx-hv1-lab- gfs:/mnt/LogGFSData/brick start Running remove-brick with cluster.force-migration enabled can result in data corruption. It is safer to disable this option so that files that receive writes during migration are not migrated. Files that are not migrated can then be manually copied after the remove-brick commit operation. Do you want to continue with your current cluster.force-migration settings? (y/n) y volume remove-brick start: failed: need 2(xN) bricks for reducing replica count of the volume from 3 to 1
... What am I missing?
- Gilboa _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/OIXTFTJREUAHGP...
Hello, Many thanks for your email. I should add that this is a test environment we set up in preparation for a planned CentOS 7 / oVirt 4.3 upgrade to CentOS 8 Streams / oVirt 4.5 upgrade in one of our old(er) oVirt clusters. In this case, we blew up the software RAID during the OS replacement (CentOS 7 -> 8) so have a host, but no storage. And as an added bonus, the FS locations are a bit different. (due MD changes we made during the blowup). So, essentially the host is alive, but we need to create a new brick using a known good brick. A couple of questions: Assuming I have a known good brick to copy but the FS location is different and given the fact I cannot simply remove/add brick, how do I change the brick path? Old location: office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick New location: office-wx-hv1-lab-gfs.localdomain:/gluster/brick/data/brick Thanks again, Gilboa On Mon, Jul 18, 2022 at 1:32 AM Patrick Hibbs <hibbsncc1701@gmail.com> wrote:
What you are missing is the fact that gluster requires more than one set of bricks to recover from a dead host. I.e. In your set up, you'd need 6 hosts. 4x replicas and 2x arbiters with at least one set (2x replicas and 1x arbiter) operational bare minimum. Automated commands to fix the volume do not exist otherwise. (It's a Gluster limitation.) This can be fixed manually however.
Standard Disclaimer: Back up your data first! Fixing this issue requires manual intervention. Reader assumes all responsiblity for any action resulting from the instructions below. Etc.
If it's just a dead brick, (i.e. the host is still functional), all you really need to do is replace the underlying storage:
1. Take the gluster volume offline. 2. Remove the bad storage device, and attach the replacement. 3. rsync / scp / etc. the data from a known good brick (be sure to include hidden files / preserve file times and ownership / SELinux labels / etc. ). 4. Restart the gluster volume.
Gluster *might* still need to heal everything after all of that, but it should start the volume and get it running again.
If the host itself is dead, (and the underlying storage is still functional), you can just move the underlying storage over to the new host:
1. Take the gluster volume offline. 2. Attach the old storage. 3. Fix up the ids on the volume file. ( https://serverfault.com/questions/631365/rename-a-glusterfs-peer) 4. Restart the gluster volume.
If both the host and underlying storage are dead, you'll need to do both tasks:
1. Take the gluster volume offline. 2. Attach the new storage. 3. rsync / scp / etc. the data from a known good brick (be sure to include hidden files / preserve file times and ownership / SELinux labels / etc. ). 4. Fix up the ids on the volume file. 5. Restart the gluster volume.
Keep in mind one thing however: If the gluster host you are replacing is used by oVirt to connect to the volume (I.e. It's the host named in the volume config in the Admin portal). The new host will need to retain the old hostname / IP, or you'll need to update oVirt's config. Otherwise the VM hosts will wind up in Unassigned / Non-functional status.
- Patrick Hibbs
On Sun, 2022-07-17 at 22:15 +0300, Gilboa Davara wrote:
Hello all,
I'm attempting to replace a dead host in a replica 2 + arbiter gluster setup and replace it with a new host. I've already set up a new host (same hostname..localdomain) and got into the cluster.
$ gluster peer status Number of Peers: 2
Hostname: office-wx-hv3-lab-gfs Uuid: 4e13f796-b818-4e07-8523-d84eb0faa4f9 State: Peer in Cluster (Connected)
Hostname: office-wx-hv1-lab-gfs.localdomain <------ This is a new host. Uuid: eee17c74-0d93-4f92-b81d-87f6b9c2204d State: Peer in Cluster (Connected)
$ gluster volume info GV2Data Volume Name: GV2Data Type: Replicate Volume ID: c1946fc2-ed94-4b9f-9da3-f0f1ee90f303 Status: Stopped Snapshot Count: 0 Number of Bricks: 1 x (2 + 1) = 3 Transport-type: tcp Bricks: Brick1: office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick <------ This is the dead host. Brick2: office-wx-hv2-lab-gfs:/mnt/LogGFSData/brick Brick3: office-wx-hv3-lab-gfs:/mnt/LogGFSData/brick (arbiter) ...
Looking at the docs, it seems that I need to remove the dead brick.
$ gluster volume remove-brick GV2Data office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick start Running remove-brick with cluster.force-migration enabled can result in data corruption. It is safer to disable this option so that files that receive writes during migration are not migrated. Files that are not migrated can then be manually copied after the remove-brick commit operation. Do you want to continue with your current cluster.force-migration settings? (y/n) y volume remove-brick start: failed: Removing bricks from replicate configuration is not allowed without reducing replica count explicitly
So I guess I need to drop from replica 2 + arbiter to replica 1 + arbiter (?).
$ gluster volume remove-brick GV2Data replica 1 office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick start Running remove-brick with cluster.force-migration enabled can result in data corruption. It is safer to disable this option so that files that receive writes during migration are not migrated. Files that are not migrated can then be manually copied after the remove-brick commit operation. Do you want to continue with your current cluster.force-migration settings? (y/n) y volume remove-brick start: failed: need 2(xN) bricks for reducing replica count of the volume from 3 to 1
... What am I missing?
- Gilboa _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/OIXTFTJREUAHGP...
_______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/MAEPVKYSBBY3ZX...
If I'm understanding your question / setup correctly, the best way would be to simply mount -o bind the old path to the new one. The old path would still be used by gluster, but it would ultimately go to the new location. Changing the brick path on a single brick while leaving the original path intact on others may be possible, the gluster docs are silent either way, but I'd doubt oVirt would work correctly in that circumstance. Maybe Sandro can point us at someone who would know more on that subject? :) If it is possible to do, and standard disclaimer: I'm *NOT* recommending anyone do it, I'd imagine you'd need to follow instructions similar to (https://serverfault.com/questions/631365/rename-a-glusterfs-peer) replacing the peer name with the brick directory. -Patrick Hibbs On Mon, 2022-07-18 at 08:19 +0300, Gilboa Davara wrote:
Hello,
Many thanks for your email. I should add that this is a test environment we set up in preparation for a planned CentOS 7 / oVirt 4.3 upgrade to CentOS 8 Streams / oVirt 4.5 upgrade in one of our old(er) oVirt clusters. In this case, we blew up the software RAID during the OS replacement (CentOS 7 -> 8) so have a host, but no storage. And as an added bonus, the FS locations are a bit different. (due MD changes we made during the blowup).
So, essentially the host is alive, but we need to create a new brick using a known good brick. A couple of questions: Assuming I have a known good brick to copy but the FS location is different and given the fact I cannot simply remove/add brick, how do I change the brick path? Old location: office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick New location: office-wx-hv1-lab-gfs.localdomain:/gluster/brick/data/brick
Thanks again, Gilboa
On Mon, Jul 18, 2022 at 1:32 AM Patrick Hibbs <hibbsncc1701@gmail.com> wrote:
What you are missing is the fact that gluster requires more than one set of bricks to recover from a dead host. I.e. In your set up, you'd need 6 hosts. 4x replicas and 2x arbiters with at least one set (2x replicas and 1x arbiter) operational bare minimum. Automated commands to fix the volume do not exist otherwise. (It's a Gluster limitation.) This can be fixed manually however.
Standard Disclaimer: Back up your data first! Fixing this issue requires manual intervention. Reader assumes all responsiblity for any action resulting from the instructions below. Etc.
If it's just a dead brick, (i.e. the host is still functional), all you really need to do is replace the underlying storage:
1. Take the gluster volume offline. 2. Remove the bad storage device, and attach the replacement. 3. rsync / scp / etc. the data from a known good brick (be sure to include hidden files / preserve file times and ownership / SELinux labels / etc. ). 4. Restart the gluster volume.
Gluster *might* still need to heal everything after all of that, but it should start the volume and get it running again.
If the host itself is dead, (and the underlying storage is still functional), you can just move the underlying storage over to the new host:
1. Take the gluster volume offline. 2. Attach the old storage. 3. Fix up the ids on the volume file. (https://serverfault.com/questions/631365/rename-a-glusterfs-peer) 4. Restart the gluster volume.
If both the host and underlying storage are dead, you'll need to do both tasks:
1. Take the gluster volume offline. 2. Attach the new storage. 3. rsync / scp / etc. the data from a known good brick (be sure to include hidden files / preserve file times and ownership / SELinux labels / etc. ). 4. Fix up the ids on the volume file. 5. Restart the gluster volume.
Keep in mind one thing however: If the gluster host you are replacing is used by oVirt to connect to the volume (I.e. It's the host named in the volume config in the Admin portal). The new host will need to retain the old hostname / IP, or you'll need to update oVirt's config. Otherwise the VM hosts will wind up in Unassigned / Non-functional status.
- Patrick Hibbs
On Sun, 2022-07-17 at 22:15 +0300, Gilboa Davara wrote:
Hello all,
I'm attempting to replace a dead host in a replica 2 + arbiter gluster setup and replace it with a new host. I've already set up a new host (same hostname..localdomain) and got into the cluster.
$ gluster peer status Number of Peers: 2
Hostname: office-wx-hv3-lab-gfs Uuid: 4e13f796-b818-4e07-8523-d84eb0faa4f9 State: Peer in Cluster (Connected)
Hostname: office-wx-hv1-lab-gfs.localdomain <------ This is a new host. Uuid: eee17c74-0d93-4f92-b81d-87f6b9c2204d State: Peer in Cluster (Connected)
$ gluster volume info GV2Data Volume Name: GV2Data Type: Replicate Volume ID: c1946fc2-ed94-4b9f-9da3-f0f1ee90f303 Status: Stopped Snapshot Count: 0 Number of Bricks: 1 x (2 + 1) = 3 Transport-type: tcp Bricks: Brick1: office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick <------ This is the dead host. Brick2: office-wx-hv2-lab-gfs:/mnt/LogGFSData/brick Brick3: office-wx-hv3-lab-gfs:/mnt/LogGFSData/brick (arbiter) ...
Looking at the docs, it seems that I need to remove the dead brick.
$ gluster volume remove-brick GV2Data office-wx-hv1-lab- gfs:/mnt/LogGFSData/brick start Running remove-brick with cluster.force-migration enabled can result in data corruption. It is safer to disable this option so that files that receive writes during migration are not migrated. Files that are not migrated can then be manually copied after the remove-brick commit operation. Do you want to continue with your current cluster.force-migration settings? (y/n) y volume remove-brick start: failed: Removing bricks from replicate configuration is not allowed without reducing replica count explicitly
So I guess I need to drop from replica 2 + arbiter to replica 1 + arbiter (?).
$ gluster volume remove-brick GV2Data replica 1 office-wx-hv1- lab-gfs:/mnt/LogGFSData/brick start Running remove-brick with cluster.force-migration enabled can result in data corruption. It is safer to disable this option so that files that receive writes during migration are not migrated. Files that are not migrated can then be manually copied after the remove-brick commit operation. Do you want to continue with your current cluster.force-migration settings? (y/n) y volume remove-brick start: failed: need 2(xN) bricks for reducing replica count of the volume from 3 to 1
... What am I missing?
- Gilboa _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives:
https://lists.ovirt.org/archives/list/users@ovirt.org/message/OIXTFTJREUAHGP...
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Replacing a dead brick in a 2+1 scenario (2 data + 1 arbiter brick) requires to reduce the replica to 1 by removing the dead brick and the arbiter.Use the force option as you are not using a distributed-replicated volume . Best Regards,Strahil Nikolov On Mon, Jul 18, 2022 at 11:36, Patrick Hibbs<hibbsncc1701@gmail.com> wrote: _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/XIA6UN3ULXCN55...
Hello, Tried it: *$ gluster volume remove-brick GV2Data replica 1 office-wx-hv1-lab-gfs:/mnt/**LogGFSData/brick force* Running remove-brick with cluster.force-migration enabled can result in data corruption. It is safer to disable this option so that files that receive writes during migration are not migrated. Files that are not migrated can then be manually copied after the remove-brick commit operation. Do you want to continue with your current cluster.force-migration settings? (y/n) y volume remove-brick start: failed: need 2(xN) bricks for reducing replica count of the volume from 3 to 1 - Gilboa On Tue, Jul 19, 2022 at 11:36 PM Strahil Nikolov <hunter86_bg@yahoo.com> wrote:
Replacing a dead brick in a 2+1 scenario (2 data + 1 arbiter brick) requires to reduce the replica to 1 by removing the dead brick and the arbiter. Use the force option as you are not using a distributed-replicated volume .
Best Regards, Strahil Nikolov
On Mon, Jul 18, 2022 at 11:36, Patrick Hibbs <hibbsncc1701@gmail.com> wrote: _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/XIA6UN3ULXCN55...
The remove-brick expects the bricks that have to be removed.Yet, you specified 1 brick, so 2 are left in the volume -> yet you specified 'replica 1'.Define both the data brick and the arbiter brick. Best Regards,Strahil Nikolov On Wed, Jul 20, 2022 at 13:34, Gilboa Davara<gilboad@gmail.com> wrote: _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/I2S247DEVERX7N...
Hello, $ gluster volume info GV2Data Volume Name: GV2Data Type: Replicate Volume ID: c1946fc2-ed94-4b9f-9da3-f0f1ee90f303 Status: Stopped Snapshot Count: 0 Number of Bricks: 1 x (2 + 1) = 3 Transport-type: tcp Bricks: Brick1: office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick <------ This is the dead host. Brick2: office-wx-hv2-lab-gfs:/mnt/LogGFSData/brick Brick3: office-wx-hv3-lab-gfs:/mnt/LogGFSData/brick (arbiter) I tried to remove the dead brick, and failed. *$ gluster volume remove-brick GV2Data replica 1 office-wx-hv1-lab-gfs:/mnt/**LogGFSData/brick force* ...volume remove-brick start: failed: need 2(xN) bricks for reducing replica count of the volume from 3 to 1 What was I doing wrong? (Assuming my original configuration, 2 + 1, was acceptable). - Gilboa On Wed, Jul 20, 2022 at 7:14 PM Strahil Nikolov <hunter86_bg@yahoo.com> wrote:
The remove-brick expects the bricks that have to be removed. Yet, you specified 1 brick, so 2 are left in the volume -> yet you specified 'replica 1'. Define both the data brick and the arbiter brick.
Best Regards, Strahil Nikolov
On Wed, Jul 20, 2022 at 13:34, Gilboa Davara <gilboad@gmail.com> wrote: _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/I2S247DEVERX7N...
There is no need to stop the volume, the operation can be done online. gluster volume remove-brick GV2Data repica 1 office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick office-wx-hv3-lab-gfs:/mnt/LogGFSData/brick force replica 1 -> remaining copies ( only Brick 2 remains) When you got a replacement brick define the brick first and the arbiter second (don't forget to define the replica 3 arbiter 1 change /I think this notation is still valid/ ). Best Regards,Strahil Nikolov On Thu, Jul 21, 2022 at 14:09, Gilboa Davara<gilboad@gmail.com> wrote: _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/K4UVL3LQCTOFW2...
Hello, Many thanks for your reply. So not only did I need to remove the broken brick (office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick), I should have also remove the active arbiter (office-wx-hv3-lab-gfs:/mnt/LogGFSData/brick)? Thanks again, Gilboa On Fri, Jul 22, 2022 at 10:09 PM Strahil Nikolov <hunter86_bg@yahoo.com> wrote:
There is no need to stop the volume, the operation can be done online.
gluster volume remove-brick GV2Data repica 1 office-wx-hv1-lab-gfs:/mnt/LogGFSData/brick office-wx-hv3-lab-gfs:/mnt/LogGFSData/brick force
replica 1 -> remaining copies ( only Brick 2 remains)
When you got a replacement brick define the brick first and the arbiter second (don't forget to define the replica 3 arbiter 1 change /I think this notation is still valid/ ).
Best Regards, Strahil Nikolov
On Thu, Jul 21, 2022 at 14:09, Gilboa Davara <gilboad@gmail.com> wrote: _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/K4UVL3LQCTOFW2...
Yes. The arbiter is useless with only 1 data brick,as it contains only medatata and if you have 1 full brick (data + metadata) and 1 arbiter (only metadata) in the volume, you could end in a metadata split brain (risk is the same like replica 2 volumes) . Once you have the new data brick , you can revert the process and increase the replica count . gluster volume add-brick VOLUME replica 3 arbiter 1 host1:/path/to/data/brick host3:/path/to/arbiter/brick Best Regards,Strahil Nikolov On Sat, Jul 23, 2022 at 12:07, Gilboa Davara<gilboad@gmail.com> wrote: _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/6LOFWLT7HX3KNJ...
participants (3)
-
Gilboa Davara -
Patrick Hibbs -
Strahil Nikolov