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HPOM Agent processes

News	Agents	Recommended Links	HP HPOM Reference	itochecker	HPOM Health Check	Tracing
Changing OVcoreid of the node due to mismatch	Certificate server is not set	Changing coreid of the node due to mismatch	Undefined certificate state	opcmsgm message manager aborted	Message from opcmsg not reaching HPOM console	Error opc_dflt_lang
Starting and stopping HPOM agent	Troubleshooting of communication problems with the agent	Deinstallation of agent	Agent patching	Change of IP for the Agent	Multihomed Agenets	Policies troubleshooting
bbcutil	opcagt	opcragt	ovc	ovcert	Humor	Support Forum

The agent processes provide the functionality for fault, event, service and performance management. The agent processes are distinguished into two categories, core and subagent. The core processes are primarily responsible for controlling agent startup and shutdown, monitoring the status of the other agents, communication functions, distribution, and configuration changes.

The most common process the "accidentally dies" is coda. Depending on the status on communications broker you can start it with the following commands:

If communication broker is not running you need to execute command on the node (or using ssh from from the other server):
```
ovc -start coda
```
If communication broker is running you can do it on the HPOM server with the command:
```
opcragt -start -id coda failednode.firma.com
```

The agent processes extend the functionality of the agent platform to perform tasks, such as reading a logfile, monitoring a threshold, and intercepting a message or an SNMP trap. During operation, the agent processes send or accept information and instructions from other local HPOM processes or from the management server.

One parent process is responsible for managing the other agents. It starts, stops, and provides status on all of the other agents as required. In order for a subagent to run the policy, templates for the subagent must be installed. Policy templates are referred to as policies on HTTPS-based nodes and are called templates on RPC-based nodes.

For example, in order for the message interceptor to run, install the message policy along with the opcmsg command. In order for the logfile encapsulator to run, install the logfile components (at least one logfile policy), and so on. Following are descriptions of the HTTPS agent processes:

Control Agent (ovcd)— Parent process, starts/stops/statuses subagents, communicates with the local communication broker.
Message Agent (opcmsga )— Sends messages to message receiver on HPOM server, sends action responses to the server, interface for programs that access the internal message stream interface (MSI), forwards data to other HPOM servers, and sends agent alive packet to server.
HTTPS Communication Broker (ovbbccb)— Listens on port 383 for HTTP connection requests; returns port number of registered programs.
Configure/Distribute (ovconfd)— Distributes policies to the final location on the local file system.
Action Agent (opcacta)— Starts/stops automatic and operator actions; handles command broadcast and other desktop application requests.
Logfile Encapsulator (opcle)— Reads logfile(s), checks the logfile nodes and creates time, and triggers a file to be executed. The file to be executed is used in a case when the actual logfile may be a binary file. The content of the binary file must be converted into ASCII format and stored in a readable file in order for the logfile encapsulator to process the data. The file that is executed is the program that converts the binary file into ASCII format. For example, in order to convert the binary file wtmp, you need to execute the command last. The output from the execution of the command can be redirected to a file (such as /usr/bin/last agent process>/tmp/last.out). This process is referred to as the binary conversion process. Then the file to be read becomes /tmp/last.out.
Monitor Agent (opcmona)— Executes monitor scripts, checks monitor script returned values against threshold, creates message and sends to message agent, handles scheduled actions, and connects to the embedded performance component for performance monitor requests.
Message Interceptor (opcmsgi)— Intercepts messages created with the opcmsg command or the application program interface (API), evaluates message for match condition, and sends matched message to the message agent.
Trap Interceptor (opctrapi)— Converts SNMP traps to HPOM messages, sends messages to the message agent, can register with NNM to obtain incoming traps or listen for traps on port 162.
Event Correlation Agent (opceca)— Correlates events on the node; requires an ECS policy.
ECS Annotate Server (opcecaas)— Starts external programs; requires ECS engine.
Security Certificate Client (ovcs)— Used during installation to allow or deny certificate requests.
Performance Agent (coda)— Embedded performance component; collects performance metrics data.

Etc

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Last modified: March, 12, 2019