Questions tagged [corosync]
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162
questions
27
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9
answers
42k
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Alternatives to Heartbeat, Pacemaker and CoroSync?
Are there any major alternatives for automatic failover on Linux besides the typical Heartbeat/Pacemaker/CoroSync combinations? In particular, I'm setting up failover on EC2 instances, which only ...
- 1,071
8
votes
3
answers
2k
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 ...
- 377
7
votes
1
answer
4k
views
Pacemaker/corosync timeout before resource transfers
This seems like a simple question, but one I can't seem to find the answer for despite going over the pacemaker documentation multiple times.
I've got corosync set up with pacemaker to share a ...
- 433
7
votes
1
answer
14k
views
MySQL: Pacemaker cannot start the failed master as a new slave?
pacemaker-1.0.12-1
corosync-1.2.7-1.1
I'm going to setup failover for MySQL replication (1 master and 1 slave)
follow this guide:
https://github.com/jayjanssen/Percona-Pacemaker-Resource-Agents/blob/...
- 51.8k
6
votes
2
answers
14k
views
Secure IPTables rules for Corosync
I have two HA load balancers (hollywood and wolfman) running Corosync and Pacemaker. The eth1 interfaces are connected to the WAN, and the eth0 interfaces to the LAN, using a virtual IP as the gateway ...
- 922
5
votes
2
answers
532
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 ...
- 173
5
votes
1
answer
3k
views
Possible to set the specific order of a resource in a Pacemaker group?
Given the Pacemaker/Corosync resource configuration described below, is it possible to add a resource in a specific position within the resource group? The configuration is CentOS 7.2 using the RHEL-...
- 198k
5
votes
1
answer
1k
views
Pacemaker error on failback with drbd
I have two nodes in my cluster with drbd+pacemaker+corosync
When the first node fails, the second assumes the service and it's ok, but when we have to failback (node1 back online) it shows some errors ...
5
votes
1
answer
3k
views
DRBD + corosync + pacemaker - Servers won't connect after failover
I got 2 servers configured with drbd, corosync with pacemaker. It is all working fine, primary server gets secondary if it fails, and secondary gets primary.
But if the 1st server comes up again ...
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5
votes
0
answers
5k
views
Corosync unicast issue with different nets
I'm using a setup (on our staging-system) with 2 root-servers and 1 fail-over-ip.
As software we use corosync and pacemaker.
Corosync is configured for multicast communication via port 5405.
--> ...
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 ...
- 311
4
votes
1
answer
4k
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 ...
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4
votes
2
answers
6k
views
pacemaker corosync lsb resource script( Sybase database ASE server and backup server)
I'm trying to create a lsb resource with pcs on rhel7.2
The "sybase" script is about Sybase Database ASE Server and Backup Server Startup & Stop & Restart $ status script
Before
[...
- 41
4
votes
1
answer
1k
views
Relation between Heartbeat and Corosync on openSUSE
I'm moving a Heartbeat + Pacemaker setup to openSUSE 12.1. It turns out that Heartbeat isn't supported on this platform anymore, and therefore it is not available from the official repos.
Switching ...
- 143
4
votes
1
answer
1k
views
Add MySQL as a resource to pacemaker
I am trying to enable fail over strategy using pacemaker on a mysql Master-Master replication on two virtual machine running openSUSE 12 created by VritualBox.
I managed to complete the mysql dual-...
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4
votes
1
answer
2k
views
Start at boot time Corosync 2.X + Pacemaker 1.1 cluster (Debian Wheezy)
I can't find a way to start cluster (corosync+pacemaker) at boot time in Debian
I have updated a 2 node cluster with the following configuration on both nodes:
Debian Wheezy 7.7
Corosync v2.3.4
...
- 101
4
votes
3
answers
4k
views
Pacemaker corosync 2-node with a 3rd for quorum
I'm having trouble figuring out how to configure a 2-node setup with a third
simpler one for quorum.
It seems to think all the nodes have the capability to act as a full fallback node, when I only I ...
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4
votes
1
answer
686
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 ...
4
votes
0
answers
3k
views
Pacemaker ocf:heartbeat:IPaddr on different subnets
I'm trying to add a Pacemaker virtual IP address; with it, the gateway, and the two VMs it serves on different subnets. I've only done this before with all IPs on the same subnet, and I need some help....
- 922
3
votes
1
answer
15k
views
Is it possible to configure pacemaker with a configuration file?
I'm trying to configure pacemaker with a config file (that I can automatically generate and then ask pacemaker to "reload"). But all the examples that I see are for command-line commands or the ...
- 497
3
votes
2
answers
296
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 ...
- 293
3
votes
1
answer
1k
views
(Pacemaker) Nginx uses primary IP address instead of virtual IP to communicate with web servers
I have set up a two-node cluster (active/passive) with Corosync/Pacemaker and nginx as a reverse proxy. OS is RHEL7 and the machine has only one network interface at the moment.
I configured two ...
- 43
3
votes
1
answer
5k
views
Multi-state MySQL master/slave pacemaker resource fails to launch on cluster nodes
Setup
I'm setting up an HA cluster for a web application using two physical servers in a Corosync/Pacemaker managed cluster.
After finding out I was heading the wrong way, I decided to use heartbeat'...
- 271
3
votes
1
answer
5k
views
Corosync/Pacemaker + Haproxy Failed Actions: insufficient privileges
I setup a Corosync/Pacemaker cluster + HAproxy using the following guide on Ubuntu 14.04 LTS:
http://www.sebastien-han.fr/blog/2012/04/15/active-passive-failover-cluster-on-a-mysql-galera-cluster-with-...
- 183
3
votes
1
answer
5k
views
How do I set the pacemaker cluster name with pcs?
I'm running two pacemaker clusters on the corosync stack on CentOS 7 with all packages up to date with the distro release/updates packages.
Both clusters shows no cluster name with the command pcs ...
- 597
3
votes
1
answer
15k
views
multicast address use in corosync
I'm wondering about the purpose of the multicast address in the corosync messaging software :
Since we have to bind each net interface with an IP address and a specific port,
and each ring communicate ...
- 121
3
votes
1
answer
375
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 ...
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3
votes
1
answer
16k
views
2 corosync nodes not online together (one offline, one online)
I am currently trying to set up corosync based on this tutorial:
http://www.howtoforge.com/how-to-set-up-an-active-passive-postgresql-cluster-with-pacemaker-corosync-and-drbd-centos-5.5-p3
However, ...
3
votes
1
answer
2k
views
corosync binding to 127.0.0.1 instead of correct interface
I have the following problem when trying to implement a two-node failover cluster, using Hetzner as the hosting provider.
my corosync.conf is as follows:
# Please read the corosync.conf.5 manual ...
- 961
3
votes
1
answer
884
views
In a Pacemaker cluster, is there any way to set start-failure-is-fatal on a per resource basis?
I've got it set cluster-wide currently, but I'd really like it to be set to 'true' by default and false for only my Slave DRBD resource.
Using Pacemaker 1.1.12 and Corosync 1.4.8.
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3
votes
1
answer
2k
views
Corosync dynamically add node
I have been experimenting with Pacemaker & Corosync for a HA setup.
I installed it on two Ubuntu 14.04 Linode's and after a lot of back and forth on outdated config examples and tutorials, managed ...
- 63
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 ...
- 103
3
votes
0
answers
378
views
crm_mon -E does not run the external-agent on Debian Jessie
Setup
I'm currently having a working 2-nodes HA cluster using Pacemaker+Corosync. My nodes are running on Debian 8 (Jessie). Now I would be able to get notified when changes occur in the cluster (...
- 271
3
votes
1
answer
2k
views
NFS failover fails with stale file handles while migrating resources
Running into a bit of a problem here , I set up two servers ( Centos 6 ) with Glusterfs and a shared directory between them, I have moved the nfs directory to the shared Gluster folder and have ...
- 53
3
votes
1
answer
498
views
Pacemaker between Centos 5 and Centos 6
I'm having some troubles when configuring pacemaker+corosync between Centos 5 and Centos 6. Here is ouput of crm_mon:
On node1:
Last updated: Sun Jul 21 19:02:21 2013
Last change: Sun Jul 21 18:14:...
- 2,396
2
votes
1
answer
7k
views
Edit HA cluster config cib.xml
I want to edit pingd of my cluster config living on centos 6.5 because the addresses are no longer valid and my cluster always switching to the other node because of the failed nodes.What is the best ...
2
votes
2
answers
2k
views
Linux HA Cluster: running a resource as non-root user
i'm have successfully setup the HA cluster using pacemaker and corosync on centos7, and i've also been able to add and start resources.
one of the resources is an instance of tomcat, and in the ...
- 276
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 ...
- 181
2
votes
1
answer
3k
views
Corosync on EC2 multiple subnets
I'm working on a HA solution for apache/mysql and i'm going the DRBD with pacemaker and corosync route... I seem to be having an issue with getting my corosync service to see the other server.
I'm ...
2
votes
1
answer
901
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 ...
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2
votes
2
answers
18k
views
corosync pacemaker crm status show DC : none and offline
i'm new to corosync and pacemaker and try to build cluster by using vm node1 & node2. here is the /etc/corosync/corosync.conf
# Please read the corosync.conf.5 manual page
compatibility: ...
- 398
2
votes
1
answer
1k
views
Pacemaker location constraints on resources apparently not obeyed
I have a Pacemaker setup with two STONITH resources. They have location constraints that crm configure show lists as follows:
location loc_stonith_node1 stonith_node1 rule -inf: #id eq node1
location ...
- 653
2
votes
1
answer
5k
views
Quickly find out if pacemaker/corosync has quorum/is quorate
In a shell script, we currently call /usr/sbin/pcs status cluster and then grep -qE for 'Current DC:.*partition with quorum' to find out if the cluster is fine.
I would like to know if there is a ...
- 597
2
votes
1
answer
840
views
Slow Failover in Squid Cluster
I created a cluster with Corosync/Pacemaker. In the cluster i've configured two resources, a virtual IP and Squid.
There are 2 nodes in the cluster working on Debian 8.
crm_status displays, both ...
- 23
2
votes
2
answers
9k
views
DRBD Failed with pacemaker
I'm new with Pacemaker and DRBD but I have to configure them together.
I created 2 drbd resources : Drbdwww and DrbdMysql
But when I use drbd_mon I have the following errors :
Stack: corosync
...
- 23
2
votes
1
answer
4k
views
Can not start PostgreSQL replication resource with Corosync/Pacemaker
I'm setting up a PostgreSQL replication on two servers (CentOS 6.5) with HA by Corosync/Pacemaker.
My software info:
postgresql91-9.1.19-1PGDG.rhel6.x86_64
postgresql91-server-9.1.19-1PGDG.rhel6....
- 230
2
votes
1
answer
1k
views
Corosync 2.3.3: Unable to enable cipher
I'm trying to set up a new pacemaker/corosync stack of 2 machines.
I was using it before with corosync1, but on Ubuntu 14.04 I've got corosync 2.3.3
OK - I said, and tried to use this version of ...
- 309
2
votes
2
answers
527
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 ...
2
votes
1
answer
869
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 ...
- 131
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 (...
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