What is OCF heartbeat?
The first field (ocf in this case) is the standard to which the resource script conforms and where to find it. The second field (heartbeat in this case) is standard-specific; for OCF resources, it tells the cluster which OCF namespace the resource script is in.
What is OCF script?
Open Cluster Framework. The OCF standard is basically an extension of the Linux Standard Base conventions for init scripts to: support parameters, make them self-describing, and. make them extensible.
How do you move resources in a pacemaker?
You can use the pcs resource relocate run command to move a resource to its preferred node, as determined by current cluster status, constraints, location of resources and other settings. For information on this command, see Section 7.1. 2, “Moving a Resource to its Preferred Node”.
What is OCF resource?
Any Open Cluster Framework (OCF) compliant cluster management application is capable of managing resources using the resource agents described in this document. Pacemaker, a cluster manager supporting both the Corosync and Heartbeat cluster messaging frameworks.
What does a resource agent do?
A resource agent is an executable that manages a cluster resource. No formal definition of a cluster resource exists, other than “anything a cluster manages is a resource.” Cluster resources can be as diverse as IP addresses, file systems, database services, and entire virtual machines — to name just a few examples.
What is resource stickiness?
To address this, Pacemaker has the concept of resource stickiness, which controls how strongly a service prefers to stay running where it is. You may like to think of it as the “cost” of any downtime.
What is PCS resource clear?
We will use the pcs resource clear command, which removes all temporary constraints previously created by pcs resource move or pcs resource ban.
What is resource agent in cloud computing?
A resource agent is a processing module that collects usage data by having event-driven interactions with specialized resource software (Figure 1). The monitoring agent intercepts the message to collect relevant usage data (2) before allowing it to continue to the cloud service (3a).
How do I remove pcs constraints?
To remove the constraint with the score of 50, we would first get the constraint’s ID using pcs constraint –full, then remove it with pcs constraint remove and the ID.
Is email a PAAS?
A layer on top on PAAS. Applications like email (Gmail, Yahoo mail etc), Social Networking sites (Facebook etc)
What is the use of monitoring agent?
Monitoring and surveillance agents (also known as predictive agents) are a type of intelligent agent software that observes and reports on computer equipment. Monitoring and surveillance agents are often used to monitor complex computer networks to predict when a crash or some other defect may occur.
How do I stop computer resources?
Note that when you execute the pcs resource ban command, this adds a -INFINITY location constraint to the resource to prevent it from running on the indicated node. You can execute the pcs resource clear or the pcs constraint delete command to remove the constraint.