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"""
Netdata Unit converter tool.
"""
import csv
import sys
#
# Mapping Rules:
# * Map to pre-defined UCUM units as much as possible
# * Metrics that count things and can be expressed as "3 apples" in a sentence,
# should have the singular thing to be counted in curly bracket. Like
# "{apple}".
# * Other dimensionless values, like a state should map to "1". E.g. you
# cannot say "1 status" or "0 bool", so no unit should be displayed after
# the value.
#
#
# Mapping from existing (constituent) units to UCUM units
#
mapping = {
"%": "%",
"% of time working": "%",
"Ah": "A.h",
"Ampere": "A",
"Amps": "A",
"B": "By",
"Celsius": "Cel",
"Fahrenheit": "[degF]",
"GiB": "GiBy",
"Hz": "Hz",
"Joule": "J",
"KB": "KiBy",
"KiB": "KiBy",
"MHz": "MHz",
"Mbps": "Mibit/s",
"MB": "MiBy",
"MiB": "MiBy",
"Minute": "min",
"Minutes": "min",
"Percent": "%",
"RPM": "{rotation}/min",
"Status": "1", # bit field, dimensionless but no suffix
"V": "V",
"Volts": "V",
"Watt": "W",
"Watts": "W",
"Wh": "W.h",
"active connections": "{connection}",
"bool": "1",
"boolean": "1",
"byte": "By",
"bytes": "By",
"celsius": "Cel",
"children": "{child}",
"context switches": "{context switch}",
"count": "1",
"cpu time": "1",
"current threads": "{thread}",
"cycle count": "{cycle}",
"dBm": "dB[mW]",
"dests": "{destination}",
"difference": "1",
"directories": "{directory}",
"exit status": "1",
"entries": "{entry}",
"expired": "{object}",
"failed disks": "{disk}",
"failed servers": "{server}",
"flushes": "{flush}",
"health servers": "{server}",
"hours": "h",
"is degraded": "1",
"kilobit": "Kibit",
"kilobits": "Kibit",
"kilobyte": "KiBy",
"kilobytes": "KiBy",
"merged operations": "{operation}",
"microseconds": "us",
"microseconds lost": "us",
"milisecondds": "ms",
"miliseconds": "ms",
"milliseconds": "ms",
"misses": "{miss}",
"ms": "ms",
"ns": "ns",
"num": "1",
"nuked": "{object}",
"number": "1",
"octet": "By",
"open files": "{file}",
"open pipes": "{pipe}",
"ops": "{operation}",
"percent": "%",
"percentage": "%",
"pps": "{packet}/s",
"prefetches": "{prefetch}",
"processes": "{process}",
"queries": "{query}",
"replies": "{reply}",
"retries": "{retry}",
"s": "s",
"searches": "{search}",
"sec": "s",
"seconds": "s",
"status": "1",
"switches": "{switch}",
"temperature": "Cel",
"total": "1",
"unsynchronised blocks": "{block}",
"value": "1",
"z": "1",
# From go.d.plugin
"assemblies": "{assembly}",
"classes": "{class}",
"conns": "{connection}",
"difficulty": "1",
"dispatches": "{dispatch}",
"fetches": "{fetch}",
"gpa": "{modification}",
"hmode": "1",
"indexes": "{index}",
"log2": "1",
"mac addresses": "{mac address}",
"message bacthes": "{batch}",
"message batches": "{batch}",
"millicpu": "m{cpu}",
"pgfaults": "{page fault}",
"pmode": "1",
"ppm": "[ppm]",
"publishes": "{publish}",
"queue_length": "1",
"queue_processes": "{queue process}",
"queued_size": "1",
"ratio": "1",
"running_containers": "{container}",
"running_pod": "{pod}",
"running_pods": "{pod}",
"state": "1",
"stratum": "1",
"token_requests": "{request}",
"us": "us",
"watches": "{watch}",
"xid": "1",
}
#
# Units for specific metric names
#
overrides = {
"varnish.threads_total": "{thread}",
"dovecot.sessions": "{session}",
"dovecot.faults": "{page fault}",
"dovecot.logins": "{login}",
"dovecot.lookup": "{lookup}/s",
"mem.pgfaults": "{page fault}/s",
"system.pgfaults": "{page fault}/s",
"smartd_log.erase_fail_count": "{erase}",
"smartd_log.program_fail_count": "{program}",
"mysql.thread_cache_misses": "{thread}",
"mysql.galera_cluster_weight": "1",
"hdfs.load": "{concurrent file accesses}",
"docker.container_writeable_layer_size": "By",
}
def convert_unit(metric_name: str, unit: str) -> str:
"""
Map an old unit to a UCUM-conforming one.
1. If the metric name exists in `overrides`, use that.
2. Otherwise:
- Split the unit in components separated by a slash
- Strip the whitespace.
3. For each part:
- Check if the unit appears in `mapping` and then use that.
- Otherwise:
- Strip a final s to make it singular
- Put in between curly braces.
- Lowercase
4. Join parts with a slash.
"""
try:
result = overrides[metric_name]
except KeyError:
parts = [part.strip() for part in unit.split("/")]
result_parts = []
for part in parts:
try:
part = mapping[part]
except KeyError:
if part[-1] == "s":
part = part[:-1]
part = f"{{{part}}}".lower()
result_parts.append(part)
result = "/".join(result_parts)
return result
def main() -> None:
"""
Open file as CSV and print out rows with converted units for verification.
The CSV is expected to follow the metrics.csv format.
"""
with open(sys.argv[1], encoding="utf-8") as csvfile:
rows = csv.reader(csvfile, delimiter=",", quotechar='"')
for row in rows:
if row[0] == "metric" and row[3] == "unit":
continue
print("-----")
print(f"Metric: {row[0]}")
print(f" Scope: {row[1]}")
print(f" Dimensions: {row[2]}")
old_unit = row[3]
converted_unit = convert_unit(row[0], old_unit)
print(f" Unit: {old_unit} ----> {converted_unit}")
print(f" Description: {row[4]}")
print(f" Chart type: {row[5]}")
print(f" Labels: {row[6]}")
print(f" Plugin: {row[7]}")
print(f" Module: {row[8]}")
if __name__ == "__main__":
main()
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