ignace/cheap_system_monitor
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

nicer graphs

Browse Source
This commit is contained in:
ignace
2026-08-11 19:10:05 +02:00
parent 8ebf939e81
commit 7fe7bb02fb
3 changed files with 48 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files
generate_graphs.py
+34 -13
View File
@@ -12,23 +12,43 @@ import subprocess
PERIODS = {"3hours": "3h", "1day": "1d", "2weeks": "2w", "1year": "1y"}
COLORS = ["#2563EB", "#DC2626", "#16A34A", "#9333EA"]
LOAD_COLORS = ["#DC2626", "#F59E0B", "#FACC15"] # red, amber, yellow
def graph(output: Path, rrd: Path, start: str, title: str, unit: str,
series: list[tuple[str, str, str]], logarithmic: bool = False) -> None:
series: list[tuple[str, str, str]], logarithmic: bool = False,
stacked: bool = False, disk_memory: bool = False,
network_mixed: bool = False) -> None:
args = ["rrdtool", "graph", str(output), "--start", f"end-{start}",
"--end", "now", "--width", "900", "--height", "260",
"--title", title, "--vertical-label", unit, "--slope-mode",
"--watermark", "cheap-system-monitor"]
if logarithmic:
args += ["--logarithmic", "--lower-limit", "1"]
value_suffix = "%%" if unit == "%" else ""
for index, (ds, label, cf) in enumerate(series):
var = f"v{index}"
if network_mixed and ds == "net_out":
drawing = f"AREA:{var}#86EFAC:{label}"
elif network_mixed and ds == "net_in":
drawing = f"LINE3:{var}#2563EB:{label}"
elif disk_memory and ds == "memory":
drawing = f"LINE3:{var}#DC2626:{label}"
elif disk_memory:
# Transparency keeps multiple mountpoints visible when their
# percentage areas overlap.
drawing = f"AREA:{var}{COLORS[index % len(COLORS)]}80:{label}"
elif stacked:
stack = ":STACK" if index else ""
stacked_colors = LOAD_COLORS if title.startswith("Processor load") else COLORS
drawing = f"AREA:{var}{stacked_colors[index]}:{label}{stack}"
else:
drawing = f"LINE{2 if index < 3 else 1}:{var}{COLORS[index % len(COLORS)]}:{label}"
args += [f"DEF:{var}={rrd}:{ds}:{cf}",
f"LINE{2 if index < 3 else 1}:{var}{COLORS[index % len(COLORS)]}:{label}",
f"GPRINT:{var}:LAST:Current\\:%8.2lf%s",
f"GPRINT:{var}:AVERAGE:Average\\:%8.2lf%s",
f"GPRINT:{var}:MAX:Maximum\\:%8.2lf%s\\n"]
drawing,
f"GPRINT:{var}:LAST:Current\\:%8.2lf%s{value_suffix}",
f"GPRINT:{var}:AVERAGE:Average\\:%8.2lf%s{value_suffix}",
f"GPRINT:{var}:MAX:Maximum\\:%8.2lf%s{value_suffix}\\n"]
subprocess.run(args, check=True)
@@ -49,23 +69,24 @@ def main() -> None:
if not mounts or mounts[0] != "/":
mounts.insert(0, "/")
definitions = [
("load", "Processor load", "load", [("load1", "1 minute", "AVERAGE"), ("load5", "5 minutes", "AVERAGE"), ("load15", "15 minutes", "AVERAGE")], False),
("cpu", "CPU usage", "%", [("cpu_user", "user", "AVERAGE"), ("cpu_system", "system", "AVERAGE"), ("cpu_nice", "nice", "AVERAGE")], False),
("network", "Network throughput", "bytes/s", [("net_in", "received", "AVERAGE"), ("net_out", "sent", "AVERAGE")], False),
("disk", "Disk usage", "%", [(f"disk_{'root' if i == 0 else i}", mount, "AVERAGE") for i, mount in enumerate(mounts)], False),
("memory", "Memory usage", "%", [("memory", "used", "AVERAGE")], False),
("load", "Processor load", "load", [("load1", "1 minute", "AVERAGE"), ("load5", "5 minutes", "AVERAGE"), ("load15", "15 minutes", "AVERAGE")], False, True, False, False),
("cpu", "CPU usage", "%", [("cpu_user", "user", "AVERAGE"), ("cpu_system", "system", "AVERAGE"), ("cpu_nice", "nice", "AVERAGE")], False, True, False, False),
("network", "Network throughput", "bytes/s", [("net_out", "sent", "AVERAGE"), ("net_in", "received", "AVERAGE")], False, False, False, True),
("disk", "Disk and memory usage", "%", [(f"disk_{'root' if i == 0 else i}", mount, "AVERAGE") for i, mount in enumerate(mounts)] + [("memory", "memory", "AVERAGE")], False, False, True, False),
("uptime", "System uptime", "days", [("uptime", "uptime", "AVERAGE")], False, False, False, False),
]
for period_name, start in PERIODS.items():
for filename, title, unit, series, logarithmic in definitions:
for filename, title, unit, series, logarithmic, stacked, disk_memory, network_mixed in definitions:
graph(output_dir / f"{filename}-{period_name}.png", rrd, start,
f"{title} — {period_name}", unit, series, logarithmic)
f"{title} — {period_name}", unit, series, logarithmic,
stacked, disk_memory, network_mixed)
cards = "\n".join(
f'<section><h2>{html.escape(title)}</h2>' + "".join(
f'<figure><figcaption>{period}</figcaption>'
f'<img src="{filename}-{period}.png" alt="{html.escape(title)}, {period}"></figure>'
for period in PERIODS
) + "</section>"
for filename, title, _unit, _series, _logarithmic in definitions
for filename, title, _unit, _series, _logarithmic, _stacked, _disk_memory, _network_mixed in definitions
)
page = f"""<!doctype html>
<html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width">