Using checkmk 2.2.0. I am writing a custom plugin, and want to achieve a combined graph instead of single graphs. I am reading these docs.
My setup on the agent:
/usr/lib/check_mk_agent/plugins/my_agent_plugin.sh
<<<network_usage_monitor>>>
total_sent 6196601
total_received 1288127
The checkmk server, file: local/lib/check_mk/base/plugins/agent_based/my_network_1.py
#!/usr/bin/env python3
from .agent_based_api.v1 import (
register,
Result,
Service,
State,
Metric,
)
# Parse the raw agent data
def parse_network_usage_monitor(string_table):
parsed = {row[0]: int(row[1]) for row in string_table}
return parsed
# Discover services for network usage
def discover_network_usage_monitor(section):
yield Service()
# Check function for network usage
def check_network_usage_monitor(section):
total_sent = section.get("total_sent", 0)
total_received = section.get("total_received", 0)
if total_sent is not None and total_received is not None:
yield Result(
state=State.OK,
summary=f"Sent: {total_sent} bytes, Received: {total_received} bytes",
)
# Add performance metrics
yield Metric("total_sent", total_sent)
yield Metric("total_received", total_received)
else:
yield Result(
state=State.CRIT,
summary="Network metrics are missing or incomplete.",
)
# Register the plugin
register.agent_section(
name="network_usage_monitor",
parse_function=parse_network_usage_monitor,
)
register.check_plugin(
name="network_usage_monitor",
service_name="Network Usage",
discovery_function=discover_network_usage_monitor,
check_function=check_network_usage_monitor,
)
The visualization metric graph, at: local/share/check_mk/web/plugins/metrics/metrics.py
from cmk.gui.plugins.metrics import metric_info, graph_info
from cmk.gui.i18n import _
# Define metrics
metric_info["total_sent"] = {
"title": _("Total Bytes Sent"),
"unit": "bytes",
"color": "33/a",
}
metric_info["total_received"] = {
"title": _("Total Bytes Received"),
"unit": "bytes",
"color": "11/a",
}
# Define a single combined graph for network usage
graph_info["network_usage"] = {
"title": _("Network Usage Overview"),
"metrics": [
("total_received", "area"), # Received as an area graph
("total_sent", "line"), # Sent as a line graph
],
}
The metrics do show up in checkmk, but not the combined one.
