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Questions tagged [drbd]

DRBD is a Distributed Replicated Block Device. Developed by LinBit it is now part of the standard-linux-kernel. Regard it as RAID 1 across an IP-network using any type of block device. Normally only the "primary" side can write.

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Installed DRDB Utilities but there is no /dev/drbd0 device

Installed DRDB Utilities but there is no /dev/drbd0 device even after running the command drbdadm create-md r0. Is there a command to create /dev/drbd0 device?
user
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Synchronize Oracle database on VM under KVM using DRBD

We have two physical servers and we want to use KVM to create some VMs. One of the VMs will contain an Oracle 12 database and we want to make it highly available. We thought of using DRBD to synchronize the VM to the second server and combine all…
Wodel
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DRBD: Where am I losing 13% of disk space?

I have 2 DRBD based storage clusters. And I am somehow not able to utilize 13% of the underlying disk space. The disk in both configs is sda4 Server1: sda4 size: 859G, drbd0 size:788G, drbd0 space available with empty disk:748G Server1: sda4 size:…
bakasan
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DRBD Compare Local and Remote before sync

Is there a way for DRBD to first compare the local and remote mirror partitions to verify which one is newer before a sync is done? Basically what happens is that I was running Partition 1 for a week with Partition 2 off. Then I turned Partition 1…
lartan
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drbd both nodes inconsistent, and outofdate, how to fix?

This is a setup I inherited, and that is really old (running drbd 8.3). I tried drbdadm connect drbd0, drbdadm primary -f drbd0, but everything comes back with Need access to UpToDate data. I presume that is because of being Inconsistent.…
raarts
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iptables rules for drbd

I'm having a default DROP policy on the INPUT and OUTPUT chain configured for iptables and I am trying to configure proper iptables rules for two servers that mirror data via drbd. The resource configuration: resource data { on data001 { …
pdu
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DRBD "Device or resource busy"

So today I've been asked to configure a cluster on Centos7 using pacemaker and drbd. Everything was going fine until I tried to create a the local meta data for my resource ( a simple web server). The output of my drbdadm create-md wwwdata…
Tibor BERNARD
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DRBD in a VMware guest

I've seen a lot of posts on the internet which talk about various combinations of DRBD and VMware, but I haven't managed to find a straight answer on this one: Can I use DRBD in a VMware guest? I'm not interested in performance; I am interested in…
Symmetric
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drbd sync active-passive cluster

I have an application that installs itself into the /opt/my_app/ directory. Now I'd like to setup two servers in a cluster (active - passive) and sync the whole directory with DRBD. Now from what I understand DRBD requires a block device. So I…
postFix
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Identifying processes saturating VPS IO

I have a setup with to nodes with drbd to sync kvm VPSes for fallback. So the vps is only active on one node. The active node has 4 kvm vpses on them. The two nodes have a dedicated 10G interface for drbd sync. So that should not give an io…
Vincent
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how to force drbd for a self synchronization

I have two drbd nodes, one master and one slave. I want to use existing drbd disk after a fresh system install while the other node isn't present. Is it possible to force drbd for this? Consider the following scenario. Has lost slave node (it's…
Ricardo Cristian Ramirez
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DRBD 9 with existant LVM (RHEL 6.9) no resource defined

i'm trying to configure DRBD 9 on 2 RHEL 6.9 with LVM configured when i try to do drbdadm create-md amss_drbd the result is No resource defined i've a .res file xxx_drbd.res with this configuration on each node protocol C; device /dev/drbd1; disk…
Silvio Picardo
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HA on CentOS6.5 constantly switching

I have 2 server Asterisk on centOS in HA group with peacemaker.The cluster is in active passive mode with configured resource groups.The problem is from some time the server switch from the primary to secondary with no obvious reason for me.The log…
aleksei stukov
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Pacemaker Cluster Issue - Backup Firewall does not take over in case network cable unplugged from Primary Firewall

I have an issue with pacemaker cluster. I have two firewalls that I am using in Active/ Backup HA. The heartbeat IPs are 10.0.0.1 (FW 1) & 10.0.0.2 (FW 2) on a dedicated network. Traffic IPs on LAN network are 131.107.2.2 (FW 1), 131.107.2.3 (FW 2)…
adityakaran
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LVM detecting signatures on underlying block device despite filters

So I'm asking this question solely so I can post my own solution. I ran into a situation where my disks looked like this: LVM DRBD-RESOURCE UNDERLYING-BLOCK-DEVICE Using Drbd 9, I was running into a problem where LVM was finding the lvm signatures…
rlewkowicz
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