Redis¶

Redis is used as a caching layer and data store within Lightrun. It can be deployed as a Local Redis with the chart or used as an External Redis. This is controlled by the settings under deployments.redis in values.yaml.

There are two modes:

• Local Redis Deployment (deployments.redis.external.enabled: false): The chart deploys a local Redis instance.
• External Redis Deployment (deployments.redis.external.enabled: true): The chart connects to an externally managed Redis instance. In this mode, the configuration depends on the deployments.redis.architecture setting: - For single architecture, specify the endpoint. - For replicated architecture, provide the replicatedConfig.nodeAddresses (this list is mandatory).

[!NOTE] When using external Redis, ensure that the provided endpoints are reachable. Also, if using replicated architecture, the list of node addresses must be correctly provided.

[!IMPORTANT] - Supported Redis versions: 7.1 and 7.2 - Minimum size requirements: 2 vCPU, 6GB memory - Supported HA configurations: Only replication mode is supported (cluster mode is not supported).

Configuration Options¶

General Settings¶

deployments:
  redis:
    architecture: single  # (single|replicated) Determines how the backend treats Redis.
    encryption:
      enabled: false      # Enable SSL encryption for Redis transport.
    port: "6379"          # Redis port. Adjust if your external provider requires a different port (e.g., Azure Cache for Redis uses 6380).
    auth:
      enabled: false      # Enable Redis authentication. Requires secrets.redis.password to be set.

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External Redis¶

To use an external Redis instance, set redis.external.enabled to true. In this mode, the chart will not deploy a local Redis pod but will connect to an existing redis.

• Single Architecture (default):

  deployments:
    redis:
      external:
        enabled: true
        endpoint: "redis.example.com"  # External Redis endpoint (FQDN)
  

• Replicated Architecture (commonly used with AWS ElastiCache):

  deployments:
    redis:
      architecture: replicated  # Use replicated mode for Redis.
      external:
        enabled: true
        replicatedConfig:
          nodeAddresses: ["redis-1.example.com", "redis-2.example.com"]  # List of FQDNs for reachable Redis nodes (mandatory for replicated mode)
  

[!IMPORTANT] - When using external Redis, local deployment settings (image, resources, health probes, etc.) do not apply. - In replicated mode, providing the list of node addresses is mandatory for proper connectivity. - For instructions on integrating with Redis Enterprise Operator on OpenShift, see Integrating Lightrun with Redis Enterprise Operator on OpenShift.

Local Redis¶

When using a local Redis deployment (i.e., deployments.redis.external.enabled: false), the chart deploys a local Redis instance with the following characteristics:

• Single Replica Only: The local deployment always uses one replica.
• All deployment settings (image, resources, persistence, and health probes) apply.

Configuration is defined under deployments.redis in the values.yaml file.

deployments:
  redis:
    external:
      enabled: false  # Local Redis will be deployed as part of the chart.
    image:
      repository: lightruncom/redis
      tag: alpine-7.2.5-r1
      pullPolicy: IfNotPresent
    resources:
      cpu: 2000m
      memory: 6500Mi
    podLabels: {}
    podAnnotations: {}
    annotations: {}
    podSecurityContext: {}
    containerSecurityContext: {}
    service:
      annotations: {}
      labels: {}
    emptyDir:
      sizeLimit: 5Gi  # Used for local Redis data persistence.
    affinity: {}
    livenessProbe:
      initialDelaySeconds: 50
      periodSeconds: 30
      timeoutSeconds: 5
      successThreshold: 1
      failureThreshold: 3
    readinessProbe:
      initialDelaySeconds: 30
      periodSeconds: 10
      timeoutSeconds: 5
      successThreshold: 1
      failureThreshold: 3