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prometheus: Expose 3 activity metrics #1471

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Merged
merged 2 commits into from
Nov 4, 2024
Merged

prometheus: Expose 3 activity metrics #1471

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5b157ca
prometheus: Expose 3 activity metrics
yuvipanda Nov 4, 2024
a992d31
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Nov 4, 2024
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11 changes: 11 additions & 0 deletions jupyter_server/prometheus/metrics.py
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Original file line number Diff line number Diff line change
Expand Up @@ -58,6 +58,17 @@
"Jupyter Server Extensiom Version Information",
["name", "version", "enabled"],
)
LAST_ACTIVITY = Gauge(
"jupyter_server_last_activity_timestamp_seconds",
"Timestamp of last seen activity on this Jupyter Server",
)
SERVER_STARTED = Gauge(
"jupyter_server_started_timestamp_seconds", "Timestamp of when this Jupyter Server was started"
)
ACTIVE_DURATION = Gauge(
"jupyter_server_active_duration_seconds",
"Number of seconds this Jupyter Server has been active",
)

__all__ = [
"HTTP_REQUEST_DURATION_SECONDS",
Expand Down
18 changes: 17 additions & 1 deletion jupyter_server/serverapp.py
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Original file line number Diff line number Diff line change
Expand Up @@ -110,7 +110,13 @@
GatewaySessionManager,
)
from jupyter_server.log import log_request
from jupyter_server.prometheus.metrics import SERVER_EXTENSION_INFO, SERVER_INFO
from jupyter_server.prometheus.metrics import (
ACTIVE_DURATION,
LAST_ACTIVITY,
SERVER_EXTENSION_INFO,
SERVER_INFO,
SERVER_STARTED,
)
from jupyter_server.services.config import ConfigManager
from jupyter_server.services.contents.filemanager import (
AsyncFileContentsManager,
Expand Down Expand Up @@ -2708,6 +2714,16 @@ def init_metrics(self) -> None:
name=ext.name, version=ext.version, enabled=str(ext.enabled).lower()
)

started = self.web_app.settings["started"]
SERVER_STARTED.set(started.timestamp())

LAST_ACTIVITY.set_function(lambda: self.web_app.last_activity().timestamp())
ACTIVE_DURATION.set_function(
lambda: (
self.web_app.last_activity() - self.web_app.settings["started"]
).total_seconds()
)

@catch_config_error
def initialize(
self,
Expand Down
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