Hi, today you will learn How install a Pacemaker with Apache on RHEL 8.
A pacemaker with apache high-availability cluster management tool in Red Hat Enterprise Linux 8 that monitors and manages services running on Apache servers. It provides failover capabilities for system failures. Pacemaker combines with httpd using a resource agent. The information is used to decide start or stop the service.
Also, It can be configured to monitor the health of the service and initiate a failover if the service is unavailable. Helps to ensure high availability and uninterrupted service for Apache-based applications.
So, Pacemaker on RHEL8 with httpd is a high-availability solution that provides automatic failover for Web Server.
- High availability: With Pacemaker, the service is highly available, reducing downtime and increasing reliability.
- Load balancing: is configured to distribute incoming requests across multiple nodes.
- Scalability: The Apache service can be scaled easily with clustered by adding or removing nodes as required.
- Easy to configure: Pacemaker provides an easy-to-use graphical user interface for the configuration and management of services.
- Complex setup: Setting up a Pacemaker with service resources requires a certain level of technical knowledge and can be complex for non-technical users.
- Resource intensive: Pacemaker requires resources and computing power to operate, increasing the load on the system.
- Single point of failure: If Pacemaker itself fails, the httpd service becomes unavailable, making it a single point of failure.
- Increased cost: Implementing Pacemaker on RHEL8 with Httpd may increase the cost of deployment, as hardware and licensing may be required.
To install Pacemaker with Apache on RHEL 8, follow these steps:
- Enable the High Availability:
# dnf install -y dnf-plugins-core # dnf config-manager --set-enabled rhel-8-for-x86_64-highavailability-rpms
2. Then, install the Pacemaker packages:
# dnf install -y pacemaker pcs resource-agents httpd
3. Start and enable the PCS daemon:
# systemctl start pcsd # systemctl enable pcsd
4. Then, configure authentication for PCS:
sudo pcs cluster auth node1 node2
5. Then, Create the cluster:
sudo pcs cluster setup --name apache-cluster node1 node2
6. After that, Start the cluster:
# pcs cluster start
7. Then, verify that the cluster is running:
# pcs status
8. Start Apache service:
sudo systemctl start httpd sudo systemctl enable httpd
9. Then, create a resource for Apache:
sudo pcs resource create apache ocf:heartbeat:Apache configfile=/etc/httpd/conf/httpd.conf op start timeout=60s op stop timeout=60s op monitor interval=30s
10. Next, Verify the status of the cluster:
sudo pcs status
11. Finally, Make sure the Apache service is running:
sudo systemctl status httpd