Using the GitLab-Exporter chart

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The gitlab-exporter sub-chart provides Prometheus metrics for GitLab application-specific data. It talks to PostgreSQL directly to perform queries to retrieve data for CI builds, pull mirrors, etc. In addition, it uses the Sidekiq API, which talks to Redis to gather different metrics around the state of the Sidekiq queues (e.g. number of jobs).

Requirements

This chart depends on Redis and PostgreSQL services, either as part of the complete GitLab chart or provided as external services reachable from the Kubernetes cluster on which this chart is deployed.

Configuration

The gitlab-exporter chart is configured as follows: Global settings and Chart settings.

Installation command line options

The table below contains all the possible chart configurations that can be supplied to the helm install command using the --set flags.

Parameter Default Description
affinity {} Affinity rules for pod assignment
annotations   Pod annotations
common.labels {} Supplemental labels that are applied to all objects created by this chart.
podLabels   Supplemental Pod labels. Will not be used for selectors.
common.labels   Supplemental labels that are applied to all objects created by this chart.
deployment.strategy {} Allows one to configure the update strategy utilized by the deployment
enabled true GitLab Exporter enabled flag
extraContainers   List of extra containers to include
extraInitContainers   List of extra init containers to include
extraVolumeMounts   List of extra volumes mounts to do
extraVolumes   List of extra volumes to create
extraEnv   List of extra environment variables to expose
extraEnvFrom   List of extra environment variables from other data sources to expose
image.pullPolicy IfNotPresent GitLab image pull policy
image.pullSecrets   Secrets for the image repository
image.repository registry.gitlab.com/gitlab-org/build/cng/gitlab-exporter GitLab Exporter image repository
image.tag   image tag
init.image.repository   initContainer image
init.image.tag   initContainer image tag
init.containerSecurityContext   initContainer container specific securityContext
metrics.enabled true If a metrics endpoint should be made available for scraping
metrics.port 9168 Metrics endpoint port
metrics.path /metrics Metrics endpoint path
metrics.serviceMonitor.enabled false If a ServiceMonitor should be created to enable Prometheus Operator to manage the metrics scraping, note that enabling this removes the prometheus.io scrape annotations
metrics.serviceMonitor.additionalLabels {} Additional labels to add to the ServiceMonitor
metrics.serviceMonitor.endpointConfig {} Additional endpoint configuration for the ServiceMonitor
metrics.annotations   DEPRECATED Set explicit metrics annotations. Replaced by template content.
priorityClassName   Priority class assigned to pods.
resources.requests.cpu 75m GitLab Exporter minimum CPU
resources.requests.memory 100M GitLab Exporter minimum memory
serviceLabels {} Supplemental service labels
service.externalPort 9168 GitLab Exporter exposed port
service.internalPort 9168 GitLab Exporter internal port
service.name gitlab-exporter GitLab Exporter service name
service.type ClusterIP GitLab Exporter service type
securityContext.fsGroup 1000 Group ID under which the pod should be started
securityContext.runAsUser 1000 User ID under which the pod should be started
securityContext.fsGroupChangePolicy   Policy for changing ownership and permission of the volume (requires Kubernetes 1.23)
containerSecurityContext   Override container securityContext under which the container is started
containerSecurityContext.runAsUser 1000 Allow to overwrite the specific security context under which the container is started
tolerations [] Toleration labels for pod assignment
psql.port   Set PostgreSQL server port. Takes precedence over global.psql.port
tls.enabled false GitLab Exporter TLS enabled
tls.secretName {Release.Name}-gitlab-exporter-tls GitLab Exporter TLS secret. Must point to a Kubernetes TLS secret.

Chart configuration examples

extraEnv

extraEnv allows you to expose additional environment variables in all containers in the pods.

Below is an example use of extraEnv: 

extraEnv:
  SOME_KEY: some_value
  SOME_OTHER_KEY: some_other_value

When the container is started, you can confirm that the environment variables are exposed: 

env | grep SOME
SOME_KEY=some_value
SOME_OTHER_KEY=some_other_value

extraEnvFrom

extraEnvFrom allows you to expose additional environment variables from other data sources in all containers in the pods.

Below is an example use of extraEnvFrom: 

extraEnvFrom:
  MY_NODE_NAME:
    fieldRef:
      fieldPath: spec.nodeName
  MY_CPU_REQUEST:
    resourceFieldRef:
      containerName: test-container
      resource: requests.cpu
  SECRET_THING:
    secretKeyRef:
      name: special-secret
      key: special_token
      # optional: boolean
  CONFIG_STRING:
    configMapKeyRef:
      name: useful-config
      key: some-string
      # optional: boolean

image.pullSecrets

pullSecrets allows you to authenticate to a private registry to pull images for a pod.

Additional details about private registries and their authentication methods can be found in the Kubernetes documentation.

Below is an example use of pullSecrets: 

image:
  repository: my.image.repository
  pullPolicy: Always
  pullSecrets:
  - name: my-secret-name
  - name: my-secondary-secret-name

affinity

For more information, see affinity.

annotations

annotations allows you to add annotations to the GitLab Exporter pods. For example: 

annotations:
  kubernetes.io/example-annotation: annotation-value

Global settings

We share some common global settings among our charts. See the Globals Documentation for common configuration options, such as GitLab and Registry hostnames.

Chart settings

The following values are used to configure the GitLab Exporter pod.

metrics.enabled

By default, the pod exposes a metrics endpoint at /metrics. When metrics are enabled, annotations are added to each pod allowing a Prometheus server to discover and scrape the exposed metrics.