• Requirements
• Design Choices
• Configuration
• Installation command line options
• Chart configuration examples
  • image.pullSecrets
  • tolerations
  • annotations
• Using the Community Edition of this chart
• External Services
  • Redis
  • PostgreSQL
  • Gitaly
• Metrics
• Chart-wide defaults
• Per-pod Settings
  • queues
  • negateQueues
  • cluster
  • Example pod entry
• Configuring the networkpolicy
  • Example Network Policy

Using the GitLab-Sidekiq chart

The sidekiq sub-chart provides configurable deployment of Sidekiq workers, explicitly designed to provide separation of queues across multiple Deployments with individual scalability and configuration.

While this chart provides a default pods: declaration, if you provide an empty definition, you will have no workers.

Requirements

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

Design Choices

This chart creates multiple Deployments and associated ConfigMaps. It was decided that it would be clearer to make use of ConfigMap behaviours instead of using environment attributes or additional arguments to the command for the containers, in order to avoid any concerns about command length. This choice results in a large number of ConfigMaps, but provides very clear definitions of what each pod should be doing.

Configuration

The sidekiq chart is configured in three parts: chart-wide external services, chart-wide defaults, and per-pod definitions.

Installation command line options

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

Chart configuration examples

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

tolerations

tolerations allow you schedule pods on tainted worker nodes

Below is an example use of tolerations:

tolerations:
- key: "node_label"
  operator: "Equal"
  value: "true"
  effect: "NoSchedule"
- key: "node_label"
  operator: "Equal"
  value: "true"
  effect: "NoExecute"

annotations

annotations allows you to add annotations to the Sidekiq pods.

Below is an example use of annotations:

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

Using the Community Edition of this chart

By default, the Helm charts use the Enterprise Edition of GitLab. If desired, you can use the Community Edition instead. Learn more about the differences between the two.

In order to use the Community Edition, set image.repository to registry.gitlab.com/gitlab-org/build/cng/gitlab-sidekiq-ce.

External Services

This chart should be attached to the same Redis, PostgreSQL, and Gitaly instances as the Unicorn chart. The values of external services will be populated into a ConfigMap that is shared across all Sidekiq pods.

Redis

redis:
  host: rank-racoon-redis
  port: 6379
  sentinels:
    - host: sentinel1.example.com
      port: 26379
  password:
    secret: gitlab-redis
    key: redis-password

Note: The current Redis Sentinel support only supports Sentinels that have been deployed separately from the GitLab chart. As a result, the Redis deployment through the GitLab chart should be disabled with redis.install=false. The Secret containing the Redis password will need to be manually created before deploying the GitLab chart.

PostgreSQL

psql:
  host: rank-racoon-psql
  serviceName: pgbouncer
  port: 5432
  database: gitlabhq_production
  username: gitlab
  preparedStatements: false
  password:
    secret: gitlab-postgres
    key: psql-password

Gitaly

gitaly:
  internal:
    names:
      - default
      - default2
  external:
    - name: node1
      hostname: node1.example.com
      port: 8079
  authToken:
    secret: gitaly-secret
    key: token

Metrics

By default, a Prometheus metrics exporter is enabled per pod. Metrics are only available when GitLab Prometheus metrics are enabled in the Admin area. The exporter exposes a /metrics endpoint on port 3807. When metrics are enabled, annotations are added to each pod allowing a Prometheus server to discover and scrape the exposed metrics.

Chart-wide defaults

The following values will be used chart-wide, in the event that a value is not presented on a per-pod basis.

Per-pod Settings

The pods declaration provides for the declaration of all attributes for a worker pod. These will be templated to Deployments, with individual ConfigMaps for their Sidekiq instances.

queues

The queues value will be directly templated into the Sidekiq configuration file. As such, you may follow the documentation from Sidekiq for the value of :queues:. If this is not provided, the upstream defaults will be used, resulting in the handling of all queues.

In summary, provide a list of queue names to process. Each item in the list may be a queue name (merge) or an array of queue names with priorities ([merge, 5]).

Any queue to which jobs are added but are not represented as a part of at least one pod item will not be processed. See config/sidekiq_queues.yml in the GitLab source for a complete list of all queues.

negateQueues

negateQueues is a list of queue names (strings) which will be filtered from the default list of Sidekiq queues. Unlike queues above which will replace the default list, negateQueues will consume the defaults, remove those named here, and populate the rest for consumption.

cluster

cluster is a boolean, used to opt into the use of Sidekiq Cluster to start the Sidekiq process. If a non-boolean is provided, then the value is ignored.

Currently defaults to false.

When using Sidekiq Cluster, queues (or negateQueues) must be a string, not an array.

Example pod entry

pods:
  - name: immediate
    concurrency: 10
    minReplicas: 2  # defaults to inherited value
    maxReplicas: 10 # defaults to inherited value
    queues:
    - [post_receive, 5]
    - [merge, 5]
    - [update_merge_requests, 3]
    - [process_commit, 3]
    - [new_note, 2]
    - [new_issue, 2]
    resources:
      limits:
        cpu: 800m
        memory: 2Gi

Configuring the networkpolicy

This section controls the NetworkPolicy. This configuration is optional and is used to limit Egress and Ingress of the Pods to specific endpoints.

Example Network Policy

The Sidekiq service requires Ingress connections for only the Prometheus exporter if enabled, and normally requires Egress connections to various places. This examples adds the following network policy:

• All Ingress requests from the network on TCP 10.0.0.0/8 port 3807 are allowed for metrics exporting
• All Egress requests to the network on UDP 10.0.0.0/8 port 53 are allowed for DNS
• All Egress requests to the network on TCP 10.0.0.0/8 port 5432 are allowed for PostgreSQL
• All Egress requests to the network on TCP 10.0.0.0/8 port 6379 are allowed for Redis
• Other Egress requests to the local network on 10.0.0.0/8 are restricted
• Egress requests outside of the 10.0.0.0/8 are allowed

Note the example provided is only an example and may not be complete

Note that the Sidekiq service requires outbound connectivity to the public internet for images on external object storage

networkpolicy:
  enabled: true
  ingress:
    enabled: true
    rules:
      - from:
        - ipBlock:
            cidr: 10.0.0.0/8
        ports:
        - port: 3807
  egress:
    enabled: true
    rules:
      - to:
        - ipBlock:
            cidr: 10.0.0.0/8
        ports:
        - port: 53
          protocol: UDP
      - to:
        - ipBlock:
            cidr: 10.0.0.0/8
        ports:
        - port: 5432
          protocol: TCP
      - to:
        - ipBlock:
            cidr: 10.0.0.0/8
        ports:
        - port: 6379
          protocol: TCP
      - to:
        - ipBlock:
            cidr: 0.0.0.0/0
            except:
            - 10.0.0.0/8