183 lines
9.4 KiB
Markdown
183 lines
9.4 KiB
Markdown
# Keycloak Metrics
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Provides metrics for Keycloak user/admin events and user/client/session count. Tested on Keycloak [22-26](.woodpecker/verify.yaml#L7-L11).
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[](https://central.sonatype.com/search?namespace=io.kokuwa.keycloak&q=keycloak-event-metrics)
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[](https://hub.docker.com/r/kokuwaio/keycloak-event-metrics)
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[](https://hub.docker.com/r/kokuwaio/keycloak-event-metrics)
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[](https://git.kokuwa.io/kokuwaio/keycloak-event-metrics/src/branch/main/Dockerfile)
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[](https://git.kokuwa.io/kokuwaio/keycloak-event-metrics/src/branch/main/LICENSE)
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[](https://git.kokuwa.io/kokuwaio/keycloak-event-metrics/pulls)
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[](https://git.kokuwa.io/kokuwaio/keycloak-event-metrics/issues)
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[](https://ci.kokuwa.io/repos/kokuwaio/keycloak-event-metrics/)
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## Why?
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[aerogear/keycloak-metrics-spi](https://github.com/aerogear/keycloak-metrics-spi) is an alternative to this plugin but is not well maintained. This implementation is different:
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* no Prometheus push (event listener only adds counter to Micrometer)
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* no realm specific Prometheus endpoint, only `/metrics` (from Quarkus)
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* no jvm/http metrics, this is [already](https://www.keycloak.org/server/configuration-metrics#_available_metrics) included in Keycloak
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* different metric names, can relace model ids with name (see [configuration](#kc_metrics_event_replace_ids))
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* deployed to maven central and very small (15 kb vs. 151 KB [aerogear/keycloak-metrics-spi](https://github.com/aerogear/keycloak-metrics-spi))
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* gauge for active/offline sessions and user/client count
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## What?
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Resuses micrometer from Quarkus distribution to add metrics for Keycloak for events.
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### User Events
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User events are added with key `keycloak_event_user_total` and tags:
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* `type`: [EventType](https://github.com/keycloak/keycloak/blob/main/server-spi-private/src/main/java/org/keycloak/events/EventType.java#L27) from [Event#type](https://github.com/keycloak/keycloak/blob/main/server-spi-private/src/main/java/org/keycloak/events/Event.java#L44)
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* `realm`: realm id from [Event#realmId](https://github.com/keycloak/keycloak/blob/main/server-spi-private/src/main/java/org/keycloak/events/Event.java#L46)
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* `client`: client id from [Event#clientId](https://github.com/keycloak/keycloak/blob/main/server-spi-private/src/main/java/org/keycloak/events/Event.java#L48), unknown client_ids are grouped into UNKOWN
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* `error`: error from [Event#error](https://github.com/keycloak/keycloak/blob/main/server-spi-private/src/main/java/org/keycloak/events/Event.java#L56), only present for error types
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Examples:
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```txt
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keycloak_event_user_total{client="test",realm="9039a0b5-e8c9-437a-a02e-9d91b04548a4",type="LOGIN",error="",} 2.0
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keycloak_event_user_total{client="test",realm="1fdb3465-1675-49e8-88ad-292e2f42ee72",type="LOGIN",error="",} 1.0
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keycloak_event_user_total{client="test",realm="1fdb3465-1675-49e8-88ad-292e2f42ee72",type="LOGIN_ERROR",error="invalid_user_credentials",} 1.0
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keycloak_event_user_total{client="UNKNOWN",realm="1fdb3465-1675-49e8-88ad-292e2f42ee72",type="LOGIN_ERROR",error="invalid_user_credentials",} 1.0
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```
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### Admin Events
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Admin events are added with key `keycloak_event_admin_total` and tags:
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* `realm`: realm id from [AdminEvent#realmId](https://github.com/keycloak/keycloak/blob/main/server-spi-private/src/main/java/org/keycloak/events/admin/AdminEvent.java#L44)
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* `operation`: [OperationType](https://github.com/keycloak/keycloak/blob/main/server-spi-private/src/main/java/org/keycloak/events/admin/OperationType.java#L27) from [AdminEvent#operationType](https://github.com/keycloak/keycloak/blob/main/server-spi-private/src/main/java/org/keycloak/events/admin/AdminEvent.java#L53)
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* `resource`: [ResourceType](https://github.com/keycloak/keycloak/blob/main/server-spi-private/src/main/java/org/keycloak/events/admin/ResourceType.java#L24) from [AdminEvent#resourceType](https://github.com/keycloak/keycloak/blob/main/server-spi-private/src/main/java/org/keycloak/events/admin/AdminEvent.java#L51)
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* `error`: error from [AdminEvent#error](https://github.com/keycloak/keycloak/blob/main/server-spi-private/src/main/java/org/keycloak/events/admin/AdminEvent.java#L59), only present for error types
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Examples:
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```txt
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keycloak_event_admin_total{error="",operation="CREATE",realm="1fdb3465-1675-49e8-88ad-292e2f42ee72",resource="USER",} 1.0
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keycloak_event_admin_total{error="",operation="CREATE",realm="9039a0b5-e8c9-437a-a02e-9d91b04548a4",resource="USER",} 1.0
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```
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## Configuration
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### `KC_METRICS_EVENT_REPLACE_IDS`
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Set to `true` (the default value) than replace model ids from events with names:
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* [RealmModel#getId()](https://github.com/keycloak/keycloak/blob/main/server-spi/src/main/java/org/keycloak/models/RealmModel.java#L82) with [RealmModel#getName()](https://github.com/keycloak/keycloak/blob/main/server-spi/src/main/java/org/keycloak/models/RealmModel.java#L84)
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Metrics:
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```txt
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keycloak_event_user_total{client="test-client",error="",realm="test-realm",type="LOGIN",} 2.0
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keycloak_event_user_total{client="other-client",error="",realm="other-realm",type="LOGIN",} 1.0
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keycloak_event_user_total{client="other-client",error="invalid_user_credentials",realm="other-realm",type="LOGIN_ERROR",} 1.0
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```
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### `KC_METRICS_STATS_ENABLED`
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Set to `true` (default is `false`) to provide metrics for user/client count per realm and session count per client. Metrics:
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```txt
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# HELP keycloak_users
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# TYPE keycloak_users gauge
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keycloak_users{realm="master",} 1.0
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keycloak_users{realm="my-realm",} 2.0
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keycloak_users{realm="other-realm",} 1.0# HELP keycloak_active_user_sessions
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# TYPE keycloak_active_user_sessions gauge
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keycloak_active_user_sessions{client="admin-cli",realm="userCount_1",} 0.0
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keycloak_active_user_sessions{client="admin-cli",realm="userCount_2",} 0.0
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keycloak_active_user_sessions{client="admin-cli",realm="master",} 1.0
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# TYPE keycloak_active_client_sessions gauge
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keycloak_active_client_sessions{client="admin-cli",realm="userCount_1",} 0.0
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keycloak_active_client_sessions{client="admin-cli",realm="userCount_2",} 0.0
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keycloak_active_client_sessions{client="admin-cli",realm="master",} 0.0
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# TYPE keycloak_offline_sessions gauge
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keycloak_offline_sessions{client="admin-cli",realm="userCount_1",} 0.0
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keycloak_offline_sessions{client="admin-cli",realm="userCount_2",} 0.0
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keycloak_offline_sessions{client="admin-cli",realm="master",} 0.0
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```
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### `KC_METRICS_STATS_INTERVAL`
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If `KC_METRICS_STATS_ENABLED` is `true` this will define the interval for scraping. If not configured `PT60s` will be used.
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### `KC_METRICS_STATS_INFO_THRESHOLD` and `KC_METRICS_STATS_WARN_THRESHOLD`
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If `KC_METRICS_STATS_ENABLED` is `true` this envs will define logging if scraping takes to long. Both envs are parsed as `java.lang.Duration`.
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Default values:
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* `KC_METRICS_STATS_INFO_THRESHOLD`: 50% of `KC_METRICS_STATS_INTERVAL` = 30s
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* `KC_METRICS_STATS_WARN_THRESHOLD`: 75% of `KC_METRICS_STATS_INTERVAL` = 45s
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If scrapping takes less than `KC_METRICS_STATS_INFO_THRESHOLD` duration will be logged on debug level.
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## Installation
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### Grafana Dashboard
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Can be found here: [keycloak-metrics.json](https://git.kokuwa.io/keycloak/keycloak/blob/main/src/test/k3s/dev/grafana/files/dashboards/keycloak-metrics.json)
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### Testcontainers
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For usage in [Testcontainers](https://www.testcontainers.org/) see [KeycloakExtension.java](src/test/java/io/kokuwa/keycloak/metrics/junit/KeycloakExtension.java#L57-L68)
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### Container Image
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Registries:
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* [ghcr.io/kokuwaio/keycloak-event-metrics](https://github.com/kokuwaio/keycloak-event-metrics/pkgs/container/keycloak-event-metrics)
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* [docker.io/kokuwaio/keycloak-event-metrics](https://hub.docker.com/r/kokuwaio/keycloak-event-metrics)
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This images are based on busybox, so you can use cp to copy the jar into your keycloak.
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### Docker
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Check: [kowaio/keycloak](https://git.kokuwa.io/keycloak/keycloak)
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Dockerfile:
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```Dockerfile
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###
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### download keycloak event metrics
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###
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FROM debian:stable-slim AS metrics
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RUN apt-get -qq update
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RUN apt-get -qq install --yes --no-install-recommends ca-certificates wget
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ARG METRICS_VERSION=2.0.0
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ARG METRICS_FILE=keycloak-event-metrics-${METRICS_VERSION}.jar
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ARG METRICS_URL=https://repo1.maven.org/maven2/io/kokuwa/keycloak/keycloak-event-metrics/${METRICS_VERSION}
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RUN wget --quiet --no-hsts ${METRICS_URL}/${METRICS_FILE}
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RUN wget --quiet --no-hsts ${METRICS_URL}/${METRICS_FILE}.sha1
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RUN echo "$(cat ${METRICS_FILE}.sha1) ${METRICS_FILE}" sha1sum --quiet --check --strict -
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RUN mkdir -p /opt/keycloak/providers
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RUN mv ${METRICS_FILE} /opt/keycloak/providers
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###
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### build keycloak with metrics
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###
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FROM quay.io/keycloak/keycloak:25.2.5
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ENV KEYCLOAK_ADMIN=admin
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ENV KEYCLOAK_ADMIN_PASSWORD=password
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ENV KC_HEALTH_ENABLED=true
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ENV KC_METRICS_ENABLED=true
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COPY --from=metrics /opt/keycloak/providers /opt/keycloak/providers
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RUN /opt/keycloak/bin/kc.sh build
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```
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Run:
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```sh
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docker build . --tag keycloak:metrics
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docker run --rm -p8080 keycloak:metrics start-dev
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```
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