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Installation and Administration

Metrics and Monitoring

Updated: July 17, 2023

Metrics

The platform uses Coda Hale Yammer Metrics.

These metrics are exposed via JMX but can also be reported with CSV files or send to a Graphite server.

List of Metrics

Here is a short list of Nuxeo metrics:

  • nuxeo.repositories.default.documents
    • create: Counter of document created
    • delete: Counter of document deleted
    • update: Counter of document updated
  • nuxeo.repositories.jdbc/nuxeo.connections
    • count: VCS connection count
    • idle: VCS idle connection count
  • nuxeo.transactions.concurrents
    • count: Counter for concurrent transaction
    • max: Maximum value of the previous counter
  • nuxeo.transactions.duration Timer for transactions
  • nuxeo.transactions.rollbacks Counter for transactions in failure
  • nuxeo.works.<WORKER_POOL>:
    • completed: Counter for completed jobs
    • running: Counter of running jobs
    • scheduled.count: Counter of job waiting to be processed
    • scheduled.max: Maximum scheduled jobs
    • total: Timer for the job duration
  • nuxeo.elasticsearch.service
    • bulkIndex: Timer for bulk index operations
    • index: Timer for index operations
    • delete: Timer for deletion operations
    • search: Timer on search operations
    • fetch: Measure the time to retrieve documents
  • nuxeo.ActionService (Since hotfix 12)
    • ations or actions (typo fixed for versions 7.10-HF13 and 8.4) Timer for actions retrieval given a category (including filters evaluation)
    • action Timer for action retrieval given the action id (including filters evaluation)
    • filters Timer for filters evaluation for a given action
    • filter Timer for filter evaluation for a given filter id

See this JMX monitoring page to get a list of all available metrics.

Note that metrics are prefixed depending on how they are exposed, for instance a counter like nuxeo.repositories.default.documents.create will be accessible:

  • In Graphite with the nameservers.myhostname.nuxeo.nuxeo.repositories.default.documents.create.count
  • in JMX with a mbean named: metrics:name=nuxeo.repositories.default.documents.create

To have a complete monitoring you should also monitor the system, the database and the Elasticsearch cluster, a tool like Diamond can do this easily. The default prefix (servers.${HOSTNAME}.nuxeo) used by the Graphite reporter is compatible with Diamond but it can be changed by the setting metrics.graphite.prefix innuxeo.conf.

Reporting Metrics

Enabling JMX Reporting

To enable JMX reporting add the following to the nuxeo.conf file:

JAVA_OPTS=$JAVA_OPTS -Dcom.sun.management.jmxremote=true

You then have to manage security for this access, since there is no authentication by default.

Enabling CSV Reporting
metrics.csv.enabled=true
metrics.csv.period=10
# This will create a sub directory metrics-TIMESTAMP
metrics.csv.dir=${nuxeo.log.dir}
Enabling Graphite Reporting
metrics.graphite.enabled=true
metrics.graphite.host=localhost
metrics.graphite.port=2003
metrics.graphite.period=10

Reporting Tomcat JMX Info
metrics.tomcat.enabled=true

Note that period to report metrics are in second.

Graphite Dashboard

You can find an example of Graphite dashboard on GitHub: https://github.com/nuxeo-archives/nuxeo-runtime/blob/master/nuxeo-runtime-metrics/graphite/dashboard.json

You will have to edit the dashboard to replace the hostname (here it is octopussy).

Here is an extract of what this dashboard looks like when monitoring a daily bench.

Monitoring

The Nuxeo Platform also comes with a set of default probes and administrative statuses for monitoring, that are provided by the component Nuxeo Core Management. Both can be seen and managed from JMX and from Admin Center.

Administrative Status

An administrative Status is a way to define cluster-wide or instance-wide named variables that can be used to manage the status of a running platform:

  • turn on/off a node of the cluster,
  • display a message to all users of the platform,
  • ...

By default only three statuses are defined:

  • nuxeoInstance: indicates if a Nuxeo instance (cluster node) is active of not,
  • adminMessage: message to be displayed to all users,
  • smtpService: defines if SMTP gateway can be used.

Administrative Status can be configured and declared via the serviceDefinition extension point.

Probes

Probes can be used to run a test on the target deployed platform. Probes can be used to check that all part of the architecture are actually running for real:

  • check LDAP access,
  • check instance availability,
  • check VCS access,
  • ...

Probes can be defined via the probes extension point.

By default four probes are defined:

  • adminStatus: checks local instance enable flag (checks nuxeoInstance adminsitrative status),
  • activeRepositorySession: returns the number of active sessions per repository,
  • ldapDirectory: check LDAP connectivity,
  • remoteSQLStorageSession: number of remove VCS client connected (only used in VCS client/server mode that is not enabled by default).

Monitoring Using JMX Access

You can use JVisualVM or similar tool to access Nuxeo JMX interface. See the section Enabling JMX Access.

Monitoring Using the Admin Center

Inside the Admin Center there are two sections that are related to monitoring: Activity and Monitoring.

Activity

The Activity section provides access to:

  • A Users sessions tab that displays counters for the UI access:

    • Total number of active HTTP sessions: The number of user active user session on the UI
    • Total number of HTTP requests: The number of requests for page and dynamic resources served by JSF/faces
    • List active sessions within a duration.
  • A view on audit event logs
  • The background jobs
  • Repository analytics

Monitoring

The Monitoring sections provides access to:

  • A view on Administrative Status (view / edit)
  • A view on probes (view/run)
  • A view that allows to enable Event Listener statistic gathering

REST Access

Counters

Counter are exposed via Automation API Counters.GET

Sample CURL call:

curl -H 'Content-Type:application/json+nxrequest' -X POST -d
'{"params":{"counterNames":"org.nuxeo.web.requests"}}' -u
Administrator:Administrator http://localhost:8080/nuxeo/site/automation/Counters.GET
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