High-Availability NFS Cluster with DRBD and Pacemaker-Compatible Heartbeat
To isolate heartbeat traffic and avoid interference from production interfaces, static host routes are added for the dedicated interconnect (eth2). These persist across reboots:
# On primary node (hostname: master)
ip route add 10.20.23.111/32 dev eth2
echo "ip route add 10.20.23.111/32 dev eth2" >> /etc/rc.d/rc.local
# On seco ...
Posted on Sun, 30 Aug 2026 16:23:45 +0000 by amos_
Implementing High Availability for Web Services with Heartbeat
All demonstrations are performed in VMware virtual machines.
Operating System: CentOS 6.5 64-bit
High Availability Software: Heartbeat 3.0.4
Web Application Server: Apache HTTPD 2.2.15
Network Configuration and Resource Planning
Hostname
Interface
IP Address
Purpose
ha-primary
eth0
172.18.10.227
External management IP for WAN traffic
...
Posted on Thu, 27 Aug 2026 16:27:19 +0000 by phpwolf
Heartbeat-driven Apache HA Setup and Production Maintenance Guide
Practical Example: Highly Available Apache Web Service with Heartbeat
1. Lab Environment
Two RHEL/CentOS hosts:
node-a – 192.168.1.130
node-b – 192.168.1.129
A floating virtual IP (VIP) 192.168.1.131/24 will be managed by Heartbeat and bound to whichever node is active.
2. Install Apache on Both Nodes
sudo yum install -y httpd
3. Prepare the ...
Posted on Sun, 17 May 2026 16:29:21 +0000 by saqibb
Deploying a Two-Node Heartbeat High Availability Cluster on CentOS
Cluster Architecture and Prerequisites
To establish a robust High Availability (HA) environment using Heartbeat, a two-node architecture is configured on CentOS 6.8 (x86_64). The setup requires distinct network interfaces for management traffic and heartbeat signals to ensure reliable failover mechanisms.
Primary Node (ha-node-primary):
Menag ...
Posted on Thu, 14 May 2026 06:19:14 +0000 by stonefish
Open-Falcon Agent Setup and Configuration Guide
Official documentation: https://book.open-falcon.org/zh_0_2/usage/nodata.html
API reference: http://open-falcon.org/falcon-plus/
Agent Overview
Once the agent is deployed on a machine and properly configured with heartbeat (hbs) and transfer settings, it automatically starts collecting metrics and sending data to the backend.
Host Groups and Ma ...
Posted on Sat, 09 May 2026 23:51:23 +0000 by HeinekenBeer
Oracle RAC Cluster Heartbeat Mechanisms and Best Practices
Physical Network Configuration Guidelines
Avoid direct crossover cabling between nodes; use dedicated switches instead.
Isolate the private interconnect (heartbeat network) from the public application network.
If sharing a switch is unavoidable, enforce VLAN segmentation.
Oracle explicitly prohibits crossover cables for Clusterware internal ...
Posted on Sat, 09 May 2026 14:38:34 +0000 by kinaski