diff options
Diffstat (limited to '')
| -rw-r--r-- | synapse/metrics/_exposition.py | 60 |
1 files changed, 29 insertions, 31 deletions
diff --git a/synapse/metrics/_exposition.py b/synapse/metrics/_exposition.py index 4304c60d56..734271e765 100644 --- a/synapse/metrics/_exposition.py +++ b/synapse/metrics/_exposition.py @@ -24,9 +24,9 @@ expect, and the newer "best practice" version of the up-to-date official client. import math import threading -from collections import namedtuple from http.server import BaseHTTPRequestHandler, HTTPServer from socketserver import ThreadingMixIn +from typing import Dict, List from urllib.parse import parse_qs, urlparse from prometheus_client import REGISTRY @@ -35,14 +35,6 @@ from twisted.web.resource import Resource from synapse.util import caches -try: - from prometheus_client.samples import Sample -except ImportError: - Sample = namedtuple( # type: ignore[no-redef] # noqa - "Sample", ["name", "labels", "value", "timestamp", "exemplar"] - ) - - CONTENT_TYPE_LATEST = str("text/plain; version=0.0.4; charset=utf-8") @@ -93,17 +85,6 @@ def sample_line(line, name): ) -def nameify_sample(sample): - """ - If we get a prometheus_client<0.4.0 sample as a tuple, transform it into a - namedtuple which has the names we expect. - """ - if not isinstance(sample, Sample): - sample = Sample(*sample, None, None) - - return sample - - def generate_latest(registry, emit_help=False): # Trigger the cache metrics to be rescraped, which updates the common @@ -144,16 +125,33 @@ def generate_latest(registry, emit_help=False): ) ) output.append("# TYPE {0} {1}\n".format(mname, mtype)) - for sample in map(nameify_sample, metric.samples): - # Get rid of the OpenMetrics specific samples + + om_samples = {} # type: Dict[str, List[str]] + for s in metric.samples: for suffix in ["_created", "_gsum", "_gcount"]: - if sample.name.endswith(suffix): + if s.name == metric.name + suffix: + # OpenMetrics specific sample, put in a gauge at the end. + # (these come from gaugehistograms which don't get renamed, + # so no need to faff with mnewname) + om_samples.setdefault(suffix, []).append(sample_line(s, s.name)) break else: - newname = sample.name.replace(mnewname, mname) + newname = s.name.replace(mnewname, mname) if ":" in newname and newname.endswith("_total"): newname = newname[: -len("_total")] - output.append(sample_line(sample, newname)) + output.append(sample_line(s, newname)) + + for suffix, lines in sorted(om_samples.items()): + if emit_help: + output.append( + "# HELP {0}{1} {2}\n".format( + metric.name, + suffix, + metric.documentation.replace("\\", r"\\").replace("\n", r"\n"), + ) + ) + output.append("# TYPE {0}{1} gauge\n".format(metric.name, suffix)) + output.extend(lines) # Get rid of the weird colon things while we're at it if mtype == "counter": @@ -172,16 +170,16 @@ def generate_latest(registry, emit_help=False): ) ) output.append("# TYPE {0} {1}\n".format(mnewname, mtype)) - for sample in map(nameify_sample, metric.samples): - # Get rid of the OpenMetrics specific samples + + for s in metric.samples: + # Get rid of the OpenMetrics specific samples (we should already have + # dealt with them above anyway.) for suffix in ["_created", "_gsum", "_gcount"]: - if sample.name.endswith(suffix): + if s.name == metric.name + suffix: break else: output.append( - sample_line( - sample, sample.name.replace(":total", "").replace(":", "_") - ) + sample_line(s, s.name.replace(":total", "").replace(":", "_")) ) return "".join(output).encode("utf-8") |