Questions tagged [corosync]

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What is the correct procedure for upgrading OS and application server on two-node failover HA Pacemaker cluster?

I've scoured enough search engine results before coming over. Looking for the correct procedure to upgrade an Ubuntu server and an application server on a two-node failover HA Pacemaker/Corosync/DRBD ...
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Corosync/pacemaker fencing issue

I've created a corosync/pacemaker cluster on Centos 8 with 3 Vmware nodes, everything runs ok, i configured a floating ip among them, this respond well Full List of Resources: * Cluster_VIP (ocf::...
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108 views

Mysql resource only starts when run by root user inside pacemaker cluster. Why?

I have a pacemaker/corosync cluster with a basic configuration, nothing relatively complex. (The mysql database is on a shared disk which is not important.) The mysql primitive: (ocf_heartbeat_mysql) ...
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SUSE HA Cluster OverlayIP removal after reboot - SLES 12 SP4 (AWS EC2)

We are facing an issue with SUSE HA cluster nodes, Whenever a reboot happens on any of these HA nodes, Overlay IP is getting removed. Can someone help resolve this issue? Here is the configuration ...
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Cannot seem to start pcs cluster (NFS Cluster) disk_fencing trouble

For the life of me, I can't find a clear answer on how to start my NFS active / passive cluster. I have two nodes, node1 and node2 and followed the guide here: https://www.linuxtechi.com/configure-nfs-...
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534 views

Pacemaker + Corosync + DRBD + Samba + NFS

Hello everybody, i am trying to setup a 2 PC cluster with shared resources ClusterIP, ClusterSamba, ClusterNFS, DRBD (cloned resource) and a DRBDFS.The beginning of the project was made following the ...
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149 views

Unmount data volume hosting NFS exports

So I've got a customer with two NFS server setup in a pacemaker cluster active/standby configuration. It is a legacy system running RHEL6. On the servers there is /mnt/data1 which is an xfs mountpoint ...
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1answer
840 views

Pacemaker: Primary node is rebooted and comes back is primary instead of standby

We are using pacemaker, corosync to automate failovers. We noticed one behaviour- when primary node is rebooted, the standby node takes over as primary - which is fine. When the node comes back ...
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1answer
1k views

PCS Stonith (fencing) will kill two node cluster if first is down

I have configured a two node physical server cluster (HP ProLiant DL560 Gen8) using pcs (corosync/pacemaker/pcsd). I have also configured fencing on them using fence_ilo4. The weird thing will happen ...
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316 views

Adding (cifs, samba)Filesystem resource to PCS

I am trying to create PCS resource Filesystem on Samba share(cifs) file system type. Here is a command that I have used to create pcs resource. root@shaunak-VirtualBox:~# pcs resource show ...
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1answer
256 views

corosync 2Node vs two_node flags

is the 2node equivalent to the two_node flag ? Is it the same ? [root@srv1 ~]# corosync-quorumtool -s Quorum information ------------------ Date: Wed Mar 20 04:49:10 2019 Quorum provider:...
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1answer
4k views

quorum in a two-node cluster with pacemaker

I have two node active-passive cluster. Clusters_from_Scratch If a cluster splits into two (or more) groups of nodes that can no longer communicate with each other (aka. partitions), quorum is ...
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1answer
1k views

After failover Pacemaker moves resource back when node comes back

I'm using Pacemaker & Corosync for my cluster. When a node dies pacemaker moving my resources to another online node. Everything ok here. But when the dead node comes back, Pacemaker moving the ...
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1answer
162 views

When I start corosync all servers panics with core dumps

I upgraded my servers. Then I started corosync service one by one on my servers. I started first on 3 server and I wait 5 min. Then I started next 4 corosync on other servers and 7 server crashed in ...
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1answer
388 views

How to install debug symbols for corosync package on CentOS?

I got a crash in corosync which I would like to view in gdb. However, currently the core dump shows me only this much info Debug logs for core.1385 (Generated on Jul 26 10:17 BST) [Thread debugging ...
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1answer
1k views

Unable to mount gfs2 file system on Debian Stretch, probable dlm mis-config?

I am experimenting with gfs2 on Debian Stretch, and having some difficulties. I am a reasonably experienced Linux admin, but new to shared-disk and parallel file systems. My immediate project is to ...
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91 views

Extra Ip address assigned in one of my nodes on redhat cluster. How can I get rid of it?

I have a cluster that is not running properly. While doing something it added an extra Ip address which is not supposed to be there. Since this is generated by the cluster (not in network-script) ...
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1answer
1k views

Corosync/Pacemaker pcs equivalent commands to crm

I know crm utility command has been people's preferred method to manage clusters when it comes to High Availability with corosync & pacemaker. Now, its been deprecated and we are told to work with ...
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5k views

pcs stonith not working

i have 2 virtual centos7 nodes , root can login passwordless among themself, i have configured stonith like this but the services are not coming up, fencing is not happening , im new to this, could ...
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1answer
821 views

Pacemaker Promote Groups in Specific Order - Or Specify start last

I have a group in Pacemaker which I need to start last. Ideally I'd like to know how to configure groups to start in an specific order, but I can't seem to figure it out, not sure if its possible. ...
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1answer
4k views

Pacemaker - Corosync - HA - Simple Custom Resource Testing - Status flapping - Started - Failed - Stopped - Started

I am testing using the OCF:Heartbeat:Dummy script and I want to make a very basic setup just to know it works and build on that. The only information I can find was this web blog here. https://...
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2answers
2k views

MySQL Server monitor_20000 on node1 'not running' - HA Cluster - Pacemaker - Corosync - DRBD

I get this Error after finishing configuring cluster. And after trying to fail-BACK from node2 mysql_service01_monitor_20000 on node1 'not running' (7): call=20, status=complete, exitreason='none' ...
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1answer
1k views

MySQL DRBD Resource failing to start PaceMaker + Corosync

So I have gotten to the point where I had all services running when I configured the cluster, but after reboot I am getting the following : Full list of resources: virtual_ip (ocf::heartbeat:...
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2answers
7k views

Corosync error “No interfaces defined” in a cluster member

I am having an error starting corosync on a cluster member: May 16 00:53:32 neftis corosync[19741]: [MAIN ] Corosync Cluster Engine ('2.3.4'): started and ready to provide service. May 16 00:53:32 ...
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8k views

DRBD - 'node1' not defined in your config (for this host) - Error when setting Primary [closed]

I am getting the following error when trying to set the Primary node for DRBD. 'node1' not defined in your config (for this host). I know this is related to DNS/Hostname/Hosts and the config ...
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1answer
870 views

PCS and corosync/pacemaker

A simple and fast question about pcs. With this command pcs resource create NameService named op monitor interval=30s I create a resource named,wich is working,but if i want to run named -u named -t ...