2 nodes, active/pasive. 2 resources, a virtual ip, openLdap, and the nfs mount where openldap saves the data. When both nodes are up, things worked fine. You could move resources away and put the active in stanby. But when i rebooted the passive node, ( with the resources in the active node), and the passive … Read more
My cluster I’ve been working on just starting acting up out of no where… It looks like I’m having an issue with the exportfs resource. Any ideas on how to troubleshoot this? I can find nothing for a “-2” return code ============ Last updated: Mon Jan 7 09:18:18 2013 Last change: Fri Jan 4 16:02:13 … Read more
I am trying to come up with an architecture for achieving HA on one of our services (in-house service, single tcp connection for all requests). Just started reading on linux-ha and pacemaker, and i’d like to know if the following approach makes any sense: We have two nodes serving a single service, exactly the same, … Read more
I have the following setup, Linux stack, with front-end running nginx proxy and static assets and back-end running Ruby on Rails and MySQL in master-master replication: Primary site: front-end.a, back-end.a Secondary site: front-end.b, back-end.b A router sitting on a shared network that can route to both primary and secondary sites The primary site serves requests … Read more
I am setting up a system with two redundant servers, where one is an active one. If the active server goes down or is not reachable the other server has to become active. All the services are ready so the only required action is IP failover. I tried to setup up the basic pacemaker cluster … Read more
Iam very new to linux. suppose i have two file with same name fstab one file is located in /etc and the other is located in /root/ If i make a change in /etc/fstab file the changes has to reflect in /root/fstab . Is there any command to do this? Kindly help me… Mythili Answer … Read more
I’ve configure corosync and then I got these issue 0 nodes and 0 resources configured. [root@sitampan2 verdana]# crm status Stack: unknown Current DC: NONE Last updated: Thu Jun 16 15:15:40 2016 Last change: Wed Jun 15 14:25:43 2016 by root via cibadmin on sitampan2 0 nodes and 0 resources configured: 160547800 resources DISABLED and 4352 … Read more
I am creating a cloud based cluster so for now am using uni cast to connect to other pacemaker/corosync nodes.I was able to create a cluster using private IP’s. To create a cross region cluster , I wanted to use public IP’s. I tried using a generic configuration by giving public IP for memberaddr and … Read more
I am trying to setup a HA system based on CentOS, I want to use heartbeat v3 for the “heartbeat” mechanism, resource start/stop, looks heartbeat can get it done. But about the resource status, heartbeat cannot monitor it, for example httpd, we manually stop it, but it cannot be restarted or switch to another node. … Read more
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 loc_stonith_node2 stonith_node2 rule -inf: #id eq node2 Yet crm status indicates that both resources are started on node2: stonith_node1 (stonith:external/ipmi): Started node2 stonith_node2 (stonith:external/ipmi): Started node2 … Read more
