Keycloak Metrics SPI

A Service Provider that adds a metrics endpoint to Keycloak. The endpoint returns metrics data ready to be scraped by Prometheus.

Two distinct providers are defined:

• MetricsEventListener to record the internal Keycloak events
• MetricsEndpoint to expose the data through a custom endpoint

The endpoint is available under <base url>/realms/<realm>/metrics (Quarkus). It will return data for all realms, no matter which realm you use in the URL.

Keycloak Version Compatibility

The version of this plugin is using the same version baseline like Keycloak itself. E.g. the plugin version 25.0.1 is compatible with Keycloak 25.0.1.

License

See LICENSE file

Running the tests

$ ./mvnw clean verify

Build

To build the jar file using maven run the following command (will bundle the prometheus client libraries as well):

mvn package

It will build the project and write jar to the ./target.

Install and setup

On Keycloak Quarkus Distribution

We assume the home of keycloak is on the default /opt/keycloak

You will need to either copy the jar into the build step and run step, or copy it from the build stage. Following the example docker instructions No need to add .dodeploy.

# On build stage
COPY keycloak-metrics-spi.jar /opt/keycloak/providers/

# On run stage
COPY keycloak-metrics-spi.jar /opt/keycloak/providers/

If not copied to both stages keycloak will complain

ERROR: Failed to start quarkus
ERROR: Failed to open /opt/keycloak/lib/../providers/keycloak-metrics-spi.jar

The endpoint for the metrics is <url>/<http_relative_path>/realms/<realm>/metrics

Enable metrics-listener event

• To enable the event listener via the GUI interface, go to Manage -> Events -> Config. The Event Listeners configuration should have an entry named metrics-listener.

• To enable the event listener via the Keycloak CLI, such as when building a Docker container, use these commands.

$ /opt/jboss/keycloak/bin/kcadm.sh config credentials --server http://localhost:8080/auth --realm master --user $KEYCLOAK_USER --password $KEYCLOAK_PASSWORD
$ /opt/jboss/keycloak/bin/kcadm.sh update events/config -s "eventsEnabled=true" -s "adminEventsEnabled=true" -s "eventsListeners+=metrics-listener"
$ /usr/bin/rm -f /opt/jboss/.keycloak/kcadm.config

PushGateway

If you are running keycloak in a cluster or if you are running behind a load balancer, you might have problems scraping the metrics endpoint of each node. To fix this, you can push your metrics to a PushGateway.

Prometheus PushGateway

You can enable pushing to PushGateway by setting the environment variable PROMETHEUS_PUSHGATEWAY_ADDRESS in the keycloak instance. The format is host:port or ip:port of the Pushgateway.

If you need basic authentication you must set PROMETHEUS_PUSHGATEWAY_BASIC_AUTH_USERNAME and PROMETHEUS_PUSHGATEWAY_BASIC_AUTH_PASSWORD.

Grouping instances

The default value for the grouping key "instance" is the IP. This can be changed setting the environment variable PROMETHEUS_GROUPING_KEY_INSTANCE to a fixed value. Additionaly, if the value provided starts with the prefix ENVVALUE:, the string after the : will be used to get the value from the environment variable with that name. For example, with the next setting:

PROMETHEUS_GROUPING_KEY_INSTANCE=ENVVALUE:HOSTNAME

instance will have the value of the environment variable HOSTNAME

Grouping instances by cluster

if you have multiple KeyCloak clusters on the same runtime then you might like to groups instances by cluster's name.

That's the purpose of the environment variable PROMETHEUS_PUSHGATEWAY_JOB. The default job value is keycloak for all the instances.

For example for all the instances of a KeyCloak cluster #1 you can set:

PROMETHEUS_PUSHGATEWAY_JOB="keycloak-cluster1"

Metrics

For each metric, the endpoint returns 2 or more lines of information:

• # HELP: A small description provided by the SPI.
• # TYPE: The type of metric, namely counter and gauge. More info about types at prometheus.io/docs.
• Provided there were any values, the last one recorded. If no value has been recorded yet, no more lines will be given.
• In case the same metric have different labels, there is a different line for each one. By default all metrics are labeled by realm. More info about labels at prometheus.io/docs.

Example:

# HELP jvm_memory_bytes_committed Committed (bytes) of a given JVM memory area.
# TYPE jvm_memory_bytes_committed gauge
jvm_memory_bytes_committed{area="heap",} 2.00802304E8
jvm_memory_bytes_committed{area="nonheap",} 2.0217856E8

JVM performance

A variety of JVM metrics are provided

Generic events

Every single internal Keycloak event is being shared through the endpoint, with the descriptions Generic Keycloak User event or Generic Keycloak Admin event. Most of these events are not likely useful for the majority users but are provided for good measure. A complete list of the events can be found at Keycloak documentation.

Featured events

There are however a few events that are particularly more useful from a mobile app perspective. These events have been overriden by the SPI and are described more thoroughly below.

keycloak_login_attempts

This counter counts every login attempt performed by a non-admin user. It also distinguishes logins by the utilised identity provider by means of the label provider and by client with the label client_id..

# HELP keycloak_login_attempts Total number of login attempts
# TYPE keycloak_login_attempts counter
keycloak_login_attempts{realm="test",provider="keycloak",client_id="account"} 3.0
keycloak_login_attempts{realm="test",provider="github",client_id="application1"} 2.0

keycloak_logins_total

This counter counts every login performed by a non-admin user. It also distinguishes logins by the utilised identity provider by means of the label provider and by client with the label client_id..

# HELP keycloak_logins_total Total successful logins
# TYPE keycloak_logins_total counter
keycloak_logins_total{realm="test",provider="keycloak",client_id="account"} 3.0
keycloak_logins_total{realm="test",provider="github",client_id="application1"} 2.0

keycloak_failed_login_attempts

This counter counts every login performed by a non-admin user that fails, being the error described by the label error. It also distinguishes logins by the identity provider used by means of the label provider and by client with the label client_id.

# HELP keycloak_failed_login_attempts Total failed login attempts
# TYPE keycloak_failed_login_attempts counter
keycloak_failed_login_attempts{realm="test",provider="keycloak",error="invalid_user_credentials",client_id="application1"} 6.0
keycloak_failed_login_attempts{realm="test",provider="keycloak",error="user_not_found",client_id="application1"} 2.0

keycloak_client_logins

This counter counts every client login.

# HELP keycloak_client_logins Total successful client logins
# TYPE keycloak_client_logins counter
keycloak_client_logins{realm="test",provider="keycloak",client_id="account"} 4.0
keycloak_client_logins{realm="test",provider="github",client_id="application2"} 7.0

keycloak_failed_client_login_attempts

This counter counts every client login performed that fails, being the error described by the label error.

# HELP keycloak_failed_client_login_attempts Total failed client login attempts
# TYPE keycloak_failed_client_login_attempts counter
keycloak_failed_client_login_attempts{realm="test2",provider="keycloak",error="invalid_client_credentials",client_id="application2"} 5.0
keycloak_failed_client_login_attempts{realm="test2",provider="keycloak",error="client_not_found",client_id="application2"} 3.0

keycloak_refresh_tokens

This counter counts every refresh token.

# HELP keycloak_refresh_tokens Total number of successful token refreshes
# TYPE keycloak_refresh_tokens counter
keycloak_refresh_tokens{realm="test3",provider="keycloak",client_id="account"} 1.0
keycloak_refresh_tokens{realm="test3",provider="github",client_id="application3"} 2.0

keycloak_refresh_tokens_errors

This counter counts every refresh token that fails.

# HELP keycloak_refresh_tokens_errors Total number of failed token refreshes
# TYPE keycloak_refresh_tokens_errors counter
keycloak_refresh_tokens_errors{realm="test3",provider="keycloak",error="invalid_token",client_id="application3"} 3.0

keycloak_registrations

This counter counts every new user registration. It also distinguishes registrations by the identity provider used by means of the label provider and by client with the label client_id..

# HELP keycloak_registrations Total registered users
# TYPE keycloak_registrations counter
keycloak_registrations{realm="test",provider="keycloak",client_id="application1"} 1.0
keycloak_registrations{realm="test",provider="github",client_id="application1"} 1.0

keycloak_registrations_errors

This counter counts every new user registration that fails, being the error described by the label error. It also distinguishes registrations by the identity provider used by means of the label provider and by client with the label client_id..

# HELP keycloak_registrations_errors Total errors on registrations
# TYPE keycloak_registrations_errors counter
keycloak_registrations_errors{realm="test",provider="keycloak",error="invalid_registration",client_id="application1",} 2.0
keycloak_registrations_errors{realm="test",provider="keycloak",error="email_in_use",client_id="application1",} 3.0

keycloak_code_to_tokens

This counter counts every code to token.

# HELP keycloak_code_to_tokens Total number of successful code to token
# TYPE keycloak_code_to_tokens counter
keycloak_code_to_tokens{realm="test4",provider="keycloak",client_id="account"} 3.0
keycloak_code_to_tokens{realm="test4",provider="github",client_id="application4"} 1.0

keycloak_code_to_tokens_errors

This counter counts every code to token performed that fails, being the error described by the label error.

# HELP keycloak_code_to_tokens_errors Total number of failed code to token
# TYPE keycloak_code_to_tokens_errors counter
keycloak_code_to_tokens_errors{realm="test4",provider="keycloak",error="invalid_client_credentials",client_id="application4"} 7.0

keycloak_request_duration

This histogram records the response times per http method and puts them in one of nine buckets:

• Requests that take 50ms or less
• Requests that take 100ms or less
• Requests that take 250ms or less
• Requests that take 500ms or less
• Requests that take 1s or less
• Requests that take 2s or less
• Requests that take 10s or less
• Requests that take 30s or less
• Any request that takes longer than 30s

The response from this type of metrics has the following format:

# HELP keycloak_request_duration Request duration
# TYPE keycloak_request_duration histogram
keycloak_request_duration_bucket{method="PUT",le="50.0",} 0.0
keycloak_request_duration_bucket{method="PUT",le="100.0",} 0.0
keycloak_request_duration_bucket{method="PUT",le="250.0",} 0.0
keycloak_request_duration_bucket{method="PUT",le="500.0",} 0.0
keycloak_request_duration_bucket{method="PUT",le="1000.0",} 1.0
keycloak_request_duration_bucket{method="PUT",le="2000.0",} 2.0
keycloak_request_duration_bucket{method="PUT",le="10000.0",} 2.0
keycloak_request_duration_bucket{method="PUT",le="30000.0",} 2.0
keycloak_request_duration_bucket{method="PUT",le="+Inf",} 2.0
keycloak_request_duration_count{method="PUT",} 2.0
keycloak_request_duration_sum{method="PUT",} 3083.0

This tells you that there have been zero requests that took less than 500ms. There was one request that took less than 1s. All the other requests took less than 2s.

Aside from the buckets there are also the sum and count metrics for every method. In the above example they tell you that there have been two requests total for this http method. The sum of all response times for this combination is 3083ms.

To get the average request duration over the last five minutes for the whole server you can use the following Prometheus query:

rate(keycloak_request_duration_sum[5m]) / rate(keycloak_request_duration_count[5m])

keycloak_response_errors

This counter counts the number of response errors (responses where the http status code is in the 400 or 500 range).

# HELP keycloak_response_errors Total number of error responses
# TYPE keycloak_response_errors counter
keycloak_response_errors{code="500",method="GET",} 1

Metrics URI

The URI can be added to the metrics by setting the environment variable URI_METRICS_ENABLED to true. This will output a consolidated realm URI value to the metrics. The realm value is replaced with a generic {realm} value

# HELP keycloak_request_duration Request duration
# TYPE keycloak_request_duration histogram
keycloak_request_duration_bucket{code="200",method="GET",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/3p-cookies/step2.html",le="50.0",} 2.0
keycloak_request_duration_bucket{code="200",method="GET",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/3p-cookies/step2.html",le="100.0",} 2.0
keycloak_request_duration_bucket{code="200",method="GET",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/3p-cookies/step2.html",le="250.0",} 2.0
keycloak_request_duration_bucket{code="200",method="GET",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/3p-cookies/step2.html",le="500.0",} 2.0
keycloak_request_duration_bucket{code="200",method="GET",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/3p-cookies/step2.html",le="1000.0",} 2.0
keycloak_request_duration_bucket{code="200",method="GET",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/3p-cookies/step2.html",le="2000.0",} 2.0
keycloak_request_duration_bucket{code="200",method="GET",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/3p-cookies/step2.html",le="10000.0",} 2.0
keycloak_request_duration_bucket{code="200",method="GET",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/3p-cookies/step2.html",le="30000.0",} 2.0
keycloak_request_duration_bucket{code="200",method="GET",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/3p-cookies/step2.html",le="+Inf",} 2.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="admin/{realm}/console/whoami",le="50.0",} 0.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="admin/{realm}/console/whoami",le="100.0",} 0.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="admin/{realm}/console/whoami",le="250.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="admin/{realm}/console/whoami",le="500.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="admin/{realm}/console/whoami",le="1000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="admin/{realm}/console/whoami",le="2000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="admin/{realm}/console/whoami",le="10000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="admin/{realm}/console/whoami",le="30000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="admin/{realm}/console/whoami",le="+Inf",} 1.0

If the quanitiy of metrics is too high they can also be filtered to specific values using the URI_METRICS_FILTER e.g token,clients. This is a comman delimited value of keywords to search and display the required URIs.

# HELP keycloak_request_duration Request duration
# TYPE keycloak_request_duration histogram
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/token",le="50.0",} 0.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/token",le="100.0",} 1.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/token",le="250.0",} 1.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/token",le="500.0",} 1.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/token",le="1000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/token",le="2000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/token",le="10000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/token",le="30000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/{realm}/protocol/openid-connect/token",le="+Inf",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="",le="50.0",} 4.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="",le="100.0",} 5.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="",le="250.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="",le="500.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="",le="1000.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="",le="2000.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="",le="10000.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="",le="30000.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/master/console",uri="",le="+Inf",} 6.0
keycloak_request_duration_count{code="200",method="GET",resource="admin,admin/master/console",uri="",} 6.0
keycloak_request_duration_sum{code="200",method="GET",resource="admin,admin/master/console",uri="",} 274.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="50.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="100.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="250.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="500.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="1000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="2000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="10000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="30000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="+Inf",} 1.0
keycloak_request_duration_count{code="200",method="GET",resource="admin,admin/serverinfo",uri="",} 1.0

To remove the consolidated realm URI, set URI_METRICS_DETAILED to true

# HELP keycloak_request_duration Request duration
# TYPE keycloak_request_duration histogram
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/master/protocol/openid-connect/token",le="50.0",} 0.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/master/protocol/openid-connect/token",le="100.0",} 0.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/master/protocol/openid-connect/token",le="250.0",} 1.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/master/protocol/openid-connect/token",le="500.0",} 1.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/master/protocol/openid-connect/token",le="1000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/master/protocol/openid-connect/token",le="2000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/master/protocol/openid-connect/token",le="10000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/master/protocol/openid-connect/token",le="30000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="POST",resource="realms,realms/master/protocol/openid-connect",uri="realms/master/protocol/openid-connect/token",le="+Inf",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="50.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="100.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="250.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="500.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="1000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="2000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="10000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="30000.0",} 1.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/serverinfo",uri="",le="+Inf",} 1.0
keycloak_request_duration_count{code="200",method="GET",resource="admin,admin/serverinfo",uri="",} 1.0
keycloak_request_duration_sum{code="200",method="GET",resource="admin,admin/serverinfo",uri="",} 19.0

To replace users or clients UUID values by a generic {id} with URI_METRICS_DETAILED enabled, set URI_METRICS_UUID_HIDDEN to true

# HELP keycloak_request_duration Request duration
# TYPE keycloak_request_duration histogram
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/realms",uri="admin/realms/master/users/{id}",le="50.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/realms",uri="admin/realms/master/users/{id}",le="100.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/realms",uri="admin/realms/master/users/{id}",le="250.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/realms",uri="admin/realms/master/users/{id}",le="500.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/realms",uri="admin/realms/master/users/{id}",le="1000.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/realms",uri="admin/realms/master/users/{id}",le="2000.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/realms",uri="admin/realms/master/users/{id}",le="10000.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/realms",uri="admin/realms/master/users/{id}",le="30000.0",} 6.0
keycloak_request_duration_bucket{code="200",method="GET",resource="admin,admin/realms",uri="admin/realms/master/users/{id}",le="+Inf",} 6.0
keycloak_request_duration_count{code="200",method="GET",resource="admin,admin/realms",uri="admin/realms/master/users/{id}",} 6.0
keycloak_request_duration_sum{code="200",method="GET",resource="admin,admin/realms",uri="admin/realms/master/users/{id}",} 41.0

External Access

To disable metrics being externally accessible to a cluster. Set the environment variable 'DISABLE_EXTERNAL_ACCESS'. Once set enable the header 'X-Forwarded-Host' on your proxy. This is enabled by default on HA Proxy on Openshift.

Grafana Dashboard

You can use this dashboard or create yours https://grafana.com/grafana/dashboards/10441-keycloak-metrics-dashboard/