What is the default role for DRBD nodes
I have upgraded a node in a two-node DRBD cluster as follows:
- reinstall Debian
apt-get install drbd-utilssystemctl start drbd- obtain
/etc/drbd.d/my_resource.resfrom backup - configure block device (
disk) and IP address for DRBD resource systemctl reload drbd
At this point DRBD starts to resync and the cluster becomes operational again.
My question is this: what determines if the node acts as DRBD primary or secondary at this point. In my case the opposite node was the primary, so it was important that the upgraded node started as secondary. Is this the default?
drbd
asked Jan 14 at 9:52
rookie099rookie099
1033
add a comment |
I have upgraded a node in a two-node DRBD cluster as follows:
- reinstall Debian
apt-get install drbd-utilssystemctl start drbd- obtain
/etc/drbd.d/my_resource.resfrom backup - configure block device (
disk) and IP address for DRBD resource systemctl reload drbd
At this point DRBD starts to resync and the cluster becomes operational again.
My question is this: what determines if the node acts as DRBD primary or secondary at this point. In my case the opposite node was the primary, so it was important that the upgraded node started as secondary. Is this the default?
drbd
asked Jan 14 at 9:52
rookie099rookie099
1033
add a comment |
I have upgraded a node in a two-node DRBD cluster as follows:
- reinstall Debian
apt-get install drbd-utilssystemctl start drbd- obtain
/etc/drbd.d/my_resource.resfrom backup - configure block device (
disk) and IP address for DRBD resource systemctl reload drbd
At this point DRBD starts to resync and the cluster becomes operational again.
My question is this: what determines if the node acts as DRBD primary or secondary at this point. In my case the opposite node was the primary, so it was important that the upgraded node started as secondary. Is this the default?
drbd
asked Jan 14 at 9:52
rookie099rookie099
1033
I have upgraded a node in a two-node DRBD cluster as follows:
- reinstall Debian
apt-get install drbd-utilssystemctl start drbd- obtain
/etc/drbd.d/my_resource.resfrom backup - configure block device (
disk) and IP address for DRBD resource systemctl reload drbd
At this point DRBD starts to resync and the cluster becomes operational again.
My question is this: what determines if the node acts as DRBD primary or secondary at this point. In my case the opposite node was the primary, so it was important that the upgraded node started as secondary. Is this the default?
drbd
drbd
asked Jan 14 at 9:52
rookie099rookie099
1033
asked Jan 14 at 9:52
rookie099rookie099
1033
edited Jan 14 at 13:35
rookie099
asked Jan 14 at 9:52
rookie099rookie099
1033
asked Jan 14 at 9:52
rookie099rookie099
1033
asked Jan 14 at 9:52
rookie099rookie099
1033
1033
add a comment |
add a comment |
1 Answer
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The point which determines which one is the master (primary) one, is which node has started first. IF you start one node, you wait some time and then the other, the first one will be the primary, otherwise it will act as secondary, there is no default behaviour as the DRBD is aware of which node has been the first one to be "online".
answered Jan 14 at 10:39
DaselDasel
4497
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Dasel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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So that would mean that DRBD remains up on the primary node while I upgrade the other node, DRBD will always join as secondary on the upgraded node (for the primary is still up). Correct?
– rookie099
Jan 14 at 13:33
If the master is still up, the second node will always join as secondary right.
– Dasel
Jan 14 at 13:35
add a comment |
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1 Answer
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1 Answer
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The point which determines which one is the master (primary) one, is which node has started first. IF you start one node, you wait some time and then the other, the first one will be the primary, otherwise it will act as secondary, there is no default behaviour as the DRBD is aware of which node has been the first one to be "online".
answered Jan 14 at 10:39
DaselDasel
4497
New contributor
Dasel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
So that would mean that DRBD remains up on the primary node while I upgrade the other node, DRBD will always join as secondary on the upgraded node (for the primary is still up). Correct?
– rookie099
Jan 14 at 13:33
If the master is still up, the second node will always join as secondary right.
– Dasel
Jan 14 at 13:35
add a comment |
The point which determines which one is the master (primary) one, is which node has started first. IF you start one node, you wait some time and then the other, the first one will be the primary, otherwise it will act as secondary, there is no default behaviour as the DRBD is aware of which node has been the first one to be "online".
answered Jan 14 at 10:39
DaselDasel
4497
New contributor
Dasel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
So that would mean that DRBD remains up on the primary node while I upgrade the other node, DRBD will always join as secondary on the upgraded node (for the primary is still up). Correct?
– rookie099
Jan 14 at 13:33
If the master is still up, the second node will always join as secondary right.
– Dasel
Jan 14 at 13:35
add a comment |
The point which determines which one is the master (primary) one, is which node has started first. IF you start one node, you wait some time and then the other, the first one will be the primary, otherwise it will act as secondary, there is no default behaviour as the DRBD is aware of which node has been the first one to be "online".
answered Jan 14 at 10:39
DaselDasel
4497
New contributor
Dasel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
The point which determines which one is the master (primary) one, is which node has started first. IF you start one node, you wait some time and then the other, the first one will be the primary, otherwise it will act as secondary, there is no default behaviour as the DRBD is aware of which node has been the first one to be "online".
answered Jan 14 at 10:39
DaselDasel
4497
New contributor
Dasel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered Jan 14 at 10:39
DaselDasel
4497
New contributor
Dasel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered Jan 14 at 10:39
DaselDasel
4497
answered Jan 14 at 10:39
DaselDasel
4497
4497
New contributor
Dasel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Dasel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Dasel is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
So that would mean that DRBD remains up on the primary node while I upgrade the other node, DRBD will always join as secondary on the upgraded node (for the primary is still up). Correct?
– rookie099
Jan 14 at 13:33
If the master is still up, the second node will always join as secondary right.
– Dasel
Jan 14 at 13:35
add a comment |
So that would mean that DRBD remains up on the primary node while I upgrade the other node, DRBD will always join as secondary on the upgraded node (for the primary is still up). Correct?
– rookie099
Jan 14 at 13:33
If the master is still up, the second node will always join as secondary right.
– Dasel
Jan 14 at 13:35
So that would mean that DRBD remains up on the primary node while I upgrade the other node, DRBD will always join as secondary on the upgraded node (for the primary is still up). Correct?
– rookie099
Jan 14 at 13:33
So that would mean that DRBD remains up on the primary node while I upgrade the other node, DRBD will always join as secondary on the upgraded node (for the primary is still up). Correct?
– rookie099
Jan 14 at 13:33
If the master is still up, the second node will always join as secondary right.
– Dasel
Jan 14 at 13:35
If the master is still up, the second node will always join as secondary right.
– Dasel
Jan 14 at 13:35
add a comment |
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