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Expanding an Existing Oracle Linux Cluster

I'm seeking assistance with a situation involving an Oracle Linux 7.9 cluster that's currently running on a VMware virtual machine environment. We have two nodes in this cluster, labeled A and B. Our ...
Caterpillar's user avatar
  • 1,142
5 votes
2 answers
620 views

Corosync/Pacemaker/DRBD Resilience Tuning

I have a DRBD cluster and one node was switched off for a couple of days. The single node ran fine without a hiccup. When i switch it on I got into a situation where all resources got stopped and one ...
Waslap's user avatar
  • 173
4 votes
1 answer
806 views

Pacemaker cluster does not cleanly failover DRBD-resource (but does so manually)

I had to upgrade a cluster from Ubuntu 16.04. It did work fine on 18.04 and 20.04 but now on 22.04 it does not failover the DRBD-device. Putting the resource into maintenance mode and performing a ...
Stefan Mueller's user avatar
0 votes
0 answers
125 views

Replacing pacemaker ip addresses with static IPs and then back again

Looking to upgrade corosync/pacemaker, a problem is that version 2 and 4 of corosync cannot communicate. Having 3 nodes, on Ubuntu 20.04, seems like it will lead to a momentary split brain, will all ...
KoenDG's user avatar
  • 137
0 votes
0 answers
203 views

3-node Pacemaker setup shows 1 node 2 times, with the same name, one online and one offline

So I've got: machine001, machine002, machine003. machine001 has 2 resources, machine002 has 1 resource. Normally they don't go on the same host, unless machine002 goes in standby. Recently, I saw ...
KoenDG's user avatar
  • 137
0 votes
1 answer
238 views

A more detailed explanation of bindnetaddr?

Reading the documentation: bindnetaddr This specifies the network address the corosync executive should bind to. For example, if the local interface is 192.168.5.92 with netmask 255.255.255.0, set ...
KoenDG's user avatar
  • 137
2 votes
2 answers
547 views

NFS Server - Corosync, DRBD & Pacemaker

I have 2 HA NFS server (Ubuntu with CoroSync, Pacemaker & DRBD). Everything is working beautifully with one small issue. If I kill an NFS it fails over seamlessly (NICE!) As the killed node is ...
Matt Neubauer's user avatar
1 vote
1 answer
145 views

Corosync allowing resources on two systems

We are using pacemaker/corosync for HA. This includes both virtual IP's and software. The other day we had a failure and corosync showed the IPAddress started on both nodes which IMHO should never ...
Dovid Bender's user avatar
3 votes
2 answers
317 views

Pacemaker - Logging the result of a ping check?

I read this page and the next: https://clusterlabs.org/pacemaker/doc/deprecated/en-US/Pacemaker/1.1/html/Pacemaker_Explained/_moving_resources_due_to_connectivity_changes.html And it explains how to ...
KdgDev's user avatar
  • 293
0 votes
0 answers
477 views

Clustered vsftpd service stops working with no error log

We've got a pacemaker cluster of vsftpd server made of two nodes in a active/pasive scheme. We have experienced the following behaviour. vsftpd.log stops recording activity while xferlog keeps ...
cape's user avatar
  • 169
2 votes
0 answers
81 views

Is there a way to have pacemaker resource groups failover if all floating IP resources are unavailable?

I want to have multiple floating IPs in a resource group that will only failover if all IPs cannot work. Each floating IP is on a different subnet and can be used by the application I have. If a ...
dev4life's user avatar
0 votes
1 answer
8k views

pcs creating cluster fails because of unknown hosts

I am following several tutorials now and all of them have such steps -- authenticate given hosts in pcs and then create cluster. Yet in my case the first step (authenticating) works while the second ...
greenoldman's user avatar
3 votes
1 answer
385 views

Corosync-Pacemaker no split brain

I'm trying to set up a cluster of two nodes using CentOS 7, Corosync, Pacemaker and pcsd. I can migrate resources manually from one node to another, but if I turn off primary node (by unplugging the ...
user46170's user avatar
0 votes
0 answers
1k views

CentOS 7 - GlusterFS & Pacemaker & Corosync

I try to install a little GlusterFS (for NFS) Cluster with CentOS High Availability. I have really no idea why it failed. I started multiple times from scratch. My problem is, that I can't see any ...
j0k4b0's user avatar
  • 115
2 votes
1 answer
895 views

PCSD simple Master/Slave will not fail master over

I am trying to write a trivial pacemaker Master/Slave system. I created an agent, it's metadata follows: elm_meta_data() { cat <<EOF <?xml version="1.0"?> <!DOCTYPE ...
Steve's user avatar
  • 131
0 votes
1 answer
101 views

DRBD Single Primary Ignore File Types

Is it possible to have an exclusion list for file types (maybe even specific files) so that they wont try to sync with the secondary nodes? I have looked at the DRBD configuration file and cannot find ...
PopSpe's user avatar
  • 3
0 votes
2 answers
551 views

Pacemaker Corosync OCF Resource Lifecycle

I have been currently asked to setup Pacemaker Corosync and this is entirely new for me. I currently have a 2 node cluster. And what I want to do is to reassign the IP to the other node if active node ...
Karias Bolster's user avatar
1 vote
1 answer
282 views

Pacemaker does not boot service after node switch

I am using two virtual Ubuntu servers (latest long-term) and both have equal configuration, and are running Squid services and pcs pacemaker corosync. I have two nodes Squid01 and Squid02 with one ...
Mezja's user avatar
  • 11
0 votes
1 answer
3k views

Squid Proxy .pid file disappears after few seconds on startup

I have two virtual Ubuntu Servers which are equal and both have Squid Proxy on them. The problem is that Squid on server startup creates .pid file, but after 10-20 seconds it disappears and I have to ...
Mezja's user avatar
  • 11
1 vote
1 answer
549 views

How to extend Active-Active cluster with FreeNAS as shared storage?

I have two physical nodes powered by Ubuntu and connected to each other with Corosync. And I have the FreeNAS server as NAS. This NAS server mounted on every node - basic scenario. Now I'm not able ...
picKit's user avatar
  • 111
4 votes
1 answer
1k views

corosync/pacemaker/fencing - passive/active cluster with 2 nodes

I'm configuring a cluster 2 nodes with pacemaker/corosync, and I have some question about it (and maybe best practice : i'm far to be specialist) **OS:** redhat 7.6 I configurated the cluster with ...
drkmkzs's user avatar
  • 311
0 votes
1 answer
1k views

NFS cluster corosync + pacemaker + drbd

I made up a NFS cluster with pacemaker DRBD and corosync with two nodes everything was working fine, on my tests trying different fail over scenario my cluster is completely broken, I can't no more ...
tba's user avatar
  • 21
0 votes
1 answer
4k views

pacemaker won't start because duplicate node but can't remove dupe node because pacemaker won't start

OK! Really new to pacemaker/corosync, like 1 day new. Software: Ubuntu 18.04 LTS and the versions associated with that distro. pacemakerd: 1.1.18 corosync: 2.4.3 I accidentally removed the nodes ...
Jim's user avatar
  • 355
0 votes
1 answer
835 views

Linux RHEL cluster

I'm trying to setup a PCS cluster on two nodes running Red-hat, and did successfully, I want to setup syslog server (rsyslog) in Active/Passive mode. I created the cluster and added the resources, I ...
Ali Mohammad Al najjar's user avatar
1 vote
2 answers
863 views

Pacemaker split-brain timing of resource start and stop

I am testing a two-node cluster and testing various split-brain scenarios. It is all working fine, with resources doing what I would expect, except I am wondering about timing in a particular case. ...
user3718260's user avatar
0 votes
1 answer
901 views

Corosync pacemaker Ipaddrr2 findIf failing

I've a cluster setup with 3 nodes [having nodes A,B (VIP),C] using pacemaker and corosync. When I pull network cable one of the nodes B intentionally (as a disaster recovery test), the node A or C ...
Akhil's user avatar
  • 111
0 votes
0 answers
428 views

How to run multiple instances of the same service in Pacemaker cluster

I need to set multiple application instances groups (vip, service, iscsi disk) colocation so each group runs at the separate cluster node. I know that Pacemaker offers group attributes and rules for ...
Dima's user avatar
  • 101
1 vote
0 answers
690 views

Pacemaker Corosync VIP switches when node is brought online

I've a cluster setup with 3 nodes [having nodes A,B (VIP),C] using pacemaker and corosync. When I shutdown one of the nodes B intentionally (as a disaster recovery test), the node A or C takes VIP but ...
Akhil's user avatar
  • 111
2 votes
1 answer
3k views

Pacemaker/Corosync resource cleanup causes restart on Ubuntu (any version)

I'm having an issue with a pacemaker/corosync (2 node) cluster on Ubuntu (12.04 / 14.04 / 16.04 and 18.04) and couldn't find anyone else describing this issue. There are two ressources: res_ip (...
pToker's user avatar
  • 51
1 vote
0 answers
1k views

Corosync caused a 100% CPU load after a node disappeared. How to fix it?

A general setup (the very first for me) of Corosync + Pacemaker is made upon 4 Virtual Servers with a VirtualIP, a private network is organised with a help of OpenVPN. corosync-2.4.3-4.el7.x86_64 ...
Alex's user avatar
  • 11
1 vote
1 answer
4k views

Pacemaker, corosync delete

I've got Pacemaker in conjunction with Corosync on two nodes and two float ip. Now I need to delete this construction. What is the best way to stop Pacemaker and Corosync and delete them?
Alex's user avatar
  • 11
1 vote
1 answer
325 views

Is it possible to maintain a configuration of an arbitrary resource using pacemaker cluster

What I understood is that with resource agents (which are exactly same on all nodes), pacemaker can start/stop resource on any node. But can we also use it to sync a configuraton file in all nodes in ...
GP92's user avatar
  • 751
8 votes
3 answers
3k views

Why disable DRBD in Pacemaker cluster

The DRBD documentation (in section Integrating DRBD with Pacemaker clusters) recommends that DRBD should be disabled in a Pacemaker cluster: If you are employing the DRBD OCF resource agent, it is ...
rookie099's user avatar
  • 377
1 vote
1 answer
4k views

How to create resource for service using Corosync/Pacemaker

Am new to serverfault, hoping to see the experts answers for my query. I have done a Active/passive setup for 1 cell vCloud Director. Below are the setup details. OS : CentOS 7.10 vCloud Director : 9....
Mohammed Suhail's user avatar
0 votes
1 answer
258 views

No traffic arrives via openstack floating IP and pacemaker/corosync

I am following the steps from https://fuga.cloud/academy/tutorials/ha-vip-with-corosync-on-openstack/. I am missing a reason why traffic going into the external floating IP is not arriving correctly ...
strzelecki.maciek's user avatar
1 vote
1 answer
809 views

Pacemaker fencing not triggered

I have 2 nodes : - patroni1 : 192.168.1.38 - patroni2 : 192.168.1.39 and Virtual IP : 192.168.1.40 I have HA-Proxy installed on both. Here is my pcs status when VIP is attached to patroni2 and ...
Bino Oetomo's user avatar
1 vote
3 answers
770 views

Nagios/Icinga: Don't show CRITICAL for DRBD partitions on standby node

I've set up a pacemaker/corosync ha-cluster in a failover configuration with two nodes: productive and standby. There are three DRBD partitions. Everything works fine so far. I'm using Nagios NRPE on ...
digijay's user avatar
  • 1,245
2 votes
2 answers
2k views

CentOS 7: PCS Pacemaker Corosync Active/Active HAProxy dependency

I am trying to setup PCS for HAProxy on CentOS7 in an active/active configuration. I've done active/active before, but I am not familiar with constraints and dependency groups. So far so good: 2 ...
namezero's user avatar
  • 181
1 vote
0 answers
3k views

DLM and CLVMD not starting on pacemaker redhat HA

I was trying to configure an active-active cluster w/ gfs2, I followed the following instructions: pcs property set no-quorum-policy=freeze pcs resource create dlm ocf:pacemaker:controld op monitor ...
Ardneliahs's user avatar
0 votes
2 answers
1k views

Using the max_network_delay option of the Corosync

I have the cluster based on pacemaker and corosync. Cluster nodes are located in several data centers. And there is up to 450 ms ping latency between some of the nodes. Sometimes these delays lead to ...
Vlad's user avatar
  • 1
2 votes
0 answers
468 views

pacemaker not monitoring the service although giving op monitor interval=10s while creating resource

Following is the service scripts which runs custom script. [root@xxxxxxxxxxvmrf0001vbisalah001 ~]# cat /etc/systemd/system/drbdRes_rhcdDaemon.service [Unit] Description=Manage drbdRes cluster ...
Vijay S B's user avatar
  • 203
4 votes
1 answer
5k views

Corosync HA preventing split-brain scenario

I'm setting up a test system for self-teaching about load balancing and high availability and I'm curious about a configuration setting in Corosync and would like to know what you guys who have ...
StianM's user avatar
  • 85
1 vote
1 answer
171 views

Weird node number in load balancer setup

I got an odd problem here. I set up Corosync and Pacemaker, I used this guide as a reference but I improvised a little the first time installing it since I'm doing this to learn, not following ...
StianM's user avatar
  • 85
2 votes
1 answer
643 views

Corosync cluster will not bind vips to loopback, so apache fails to start in CentOS 7

I have a problem getting apache to work in a corosync cluster. I probably sifted through more than hundred web pages and a couple of dozen Google Searches, and was not able to find any matching ...
Rudy's user avatar
  • 21
2 votes
0 answers
783 views

Colocate pacemaker Master resources with stateless resources

I've implemented a simple two-node cluster with DRBD and a couple of network-based Master/Slave resources. Using the ethmonitor RA, I set up failover whenever the Master/Primary node loses link on ...
javanix's user avatar
  • 247
0 votes
1 answer
1k views

Dead node in Pacemaker cluster: "Couldn't complete CIB registration"

I have a situation where a two-node Pacemaker cluster does not work any more after an upgrade. Package versions are pacemaker 1.1.16-1~bpo8+ and corosync 2.4.2-3~bpo8+1 under Debian Jessie. Pacemaker ...
rookie099's user avatar
  • 377
3 votes
1 answer
3k views

DRBD resources not coming back online - Pacemaker + Corosync

I am using DRBD for replication. For testing purpose I am using 2 VMs. I have noticed that if I disconnect network interface on a node then it moves to standalone, and after I reconnect it does not go ...
bakasan's user avatar
  • 103
2 votes
1 answer
911 views

Synching Amazon EC2 Instances

I want to user Corosync and Pacemaker to sync between two servers, the servers are, two (or more) EC2 instances, with Ubuntu 16.04 installed on them. I was doing that following this article, but I'm ...
ibr's user avatar
  • 191
0 votes
1 answer
2k views

pacemaker not able to start MySQL on second node

I have a pacemaker/corosync/drbd setup on 2 physically idential Ubuntu Server 16.04 LTS and I am trying to achieve high availability for MySQL 5.7 and Apache 2.4. Both servers where set up the exact ...
P. Albrecht's user avatar
1 vote
2 answers
5k views

corosync systemd resource does not reflect service status

I have configured corosync cluster with few recources. There is custom systemd service 'jira' and systemctl corectly returns its status. QUESTION: How can I configure corosync to respect failed ...
dosmanak's user avatar
  • 161