The Gatekeeper, or a project gating system
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Monitoring

Monitoring

Statsd reporting

Zuul comes with support for the statsd protocol, when enabled and configured (see below), the Zuul scheduler will emit raw metrics to a statsd receiver which let you in turn generate nice graphics.

Configuration

Statsd support uses the statsd python module. Note that support is optional and Zuul will start without the statsd python module present.

Configuration is in the statsd section of zuul.conf.

Metrics

These metrics are emitted by the Zuul scheduler:

zuul.event.<driver>.<type>

Zuul will report counters for each type of event it receives from each of its configured drivers.

zuul.tenant.<tenant>.pipeline

Holds metrics specific to jobs. This hierarchy includes:

<pipeline name>

A set of metrics for each pipeline named as defined in the Zuul config.

all_jobs

Number of jobs triggered by the pipeline.

current_changes

The number of items currently being processed by this pipeline.

project

This hierarchy holds more specific metrics for each project participating in the pipeline.

<canonical_hostname>

The canonical hostname for the triggering project. Embedded . characters will be translated to _.

<project>

The name of the triggering project. Embedded / or . characters will be translated to _.

<branch>

The name of the triggering branch. Embedded / or . characters will be translated to _.

job

Subtree detailing per-project job statistics:

<jobname>

The triggered job name.

<result>

A counter for each type of result (e.g., SUCCESS or FAILURE, ERROR, etc.) for the job. If the result is SUCCESS or FAILURE, Zuul will additionally report the duration of the build as a timer.

current_changes

The number of items of this project currently being processed by this pipeline.

resident_time

A timer metric reporting how long each item for this project has been in the pipeline.

total_changes

The number of changes for this project processed by the pipeline since Zuul started.

resident_time

A timer metric reporting how long each item has been in the pipeline.

total_changes

The number of changes processed by the pipeline since Zuul started.

wait_time

How long each item spent in the pipeline before its first job started.

zuul.executor.<executor>

Holds metrics emitted by individual executors. The <executor> component of the key will be replaced with the hostname of the executor.

builds

Incremented each time the executor starts a build.

starting_builds

The number of builds starting on this executor. These are builds which have not yet begun their first pre-playbook.

running_builds

The number of builds currently running on this executor. This includes starting builds.

load_average

The one-minute load average of this executor, multiplied by 100.

pct_available_ram

The available RAM (including buffers and cache) on this executor, as a percentage multiplied by 100.

zuul.nodepool

Holds metrics related to Zuul requests from Nodepool.

requested

Incremented each time a node request is submitted to Nodepool.

label.<label>

Incremented each time a request for a specific label is submitted to Nodepool.

size.<size>

Incremented each time a request of a specific size is submitted to Nodepool. For example, a request for 3 nodes would use the key zuul.nodepool.requested.size.3.

canceled

The counter is incremented each time a node request is canceled by Zuul. The timer records the elapsed time from request to cancelation.

label.<label>

The same, for a specific label.

size.<size>

The same, for a specific request size.

fulfilled

The counter is incremented each time a node request is fulfilled by Nodepool. The timer records the elapsed time from request to fulfillment.

label.<label>

The same, for a specific label.

size.<size>

The same, for a specific request size.

failed

The counter is incremented each time Nodepool fails to fulfill a node request. The timer records the elapsed time from request to failure.

label.<label>

The same, for a specific label.

size.<size>

The same, for a specific request size.

current_requests

The number of outstanding nodepool requests from Zuul.

zuul.mergers

Holds metrics related to Zuul mergers.

online

The number of Zuul merger processes online.

jobs_running

The number of merge jobs running.

jobs_queued

The number of merge jobs queued.

zuul.executors

Holds metrics related to Zuul executors.

online

The number of Zuul executor processes online.

accepting

The number of Zuul executor processes accepting new jobs.

jobs_running

The number of executor jobs running.

jobs_queued

The number of executor jobs queued.

As an example, given a job named myjob in mytenant triggered by a change to myproject on the master branch in the gate pipeline which took 40 seconds to build, the Zuul scheduler will emit the following statsd events:

  • zuul.tenant.mytenant.pipeline.gate.project.example_com.myproject.master.job.myjob.SUCCESS +1
  • zuul.tenant.mytenant.pipeline.gate.project.example_com.myproject.master.job.myjob.SUCCESS 40 seconds
  • zuul.tenant.mytenant.pipeline.gate.all_jobs +1