oc-scheduler/helm

README.md - oc-scheduler Helm Chart

This document describes the different tags found in the values.yml file used in the Helm chart for the oc-scheduler component.

Tags in the values.yml file

replicaCount

• Description: Defines the number of replicas for the deployment. A replica represents an instance of the application that will be deployed.
• Example: 1 means a single instance of the oc-scheduler service will be deployed.

image.repository

• Description: Specifies the URL of the Docker image registry where the oc-scheduler component image is stored.
• Example: registry.dev.svc.cluster.local:5000/oc-scheduler refers to a local registry hosted within the cluster.local network.

image.tag

• Description: Indicates the tag of the Docker image to use. Typically, this could be a specific version or latest to always pull the latest version.
• Example: latest means the most recent version of the image will be used.

image.pullPolicy

• Description: Defines the image pull policy. The possible options are:
  • Always: Always pull the image.
  • IfNotPresent: Pull the image only if it is not already present on the node.
  • Never: Never pull the image.
• Example: IfNotPresent means the image will only be pulled if it is not already present on the node.

env.mongoDatabase

• Description: Defines the name of the MongoDB database the application will connect to.
• Example: DC_myDC refers to the MongoDB database used by the application.

env.mongoUrl

• Description: Specifies the connection URL for MongoDB used by the application.
• Example: mongodb://toto:27017 indicates that the application will connect to the MongoDB instance hosted at toto on port 27017.

service.type

• Description: Defines the type of Kubernetes service. Possible types include:
  • ClusterIP: The service is only accessible within the cluster.
  • NodePort: The service is accessible via a specific port on all cluster nodes.
  • LoadBalancer: The service is exposed via an external Load Balancer.
• Example: ClusterIP means the service will only be accessible within the Kubernetes cluster.

service.port

• Description: Specifies the port on which the service will be exposed within the cluster.
• Example: 8090 means the service will be accessible on port 8090.

service.targetPort

• Description: Defines the port on which the application listens inside the container.
• Example: 8080 means the application listens on port 8080 within the container.

resources.limits.cpu

• Description: Specifies the maximum amount of CPU (in millicores) allocated to the container.
• Example: 500m means the container can use up to 0.5 CPU (or 50% of a full CPU core).

resources.limits.memory

• Description: Specifies the maximum amount of memory (in MiB) allocated to the container.
• Example: 512Mi means the container can use up to 512 MiB of memory.

resources.requests.cpu

• Description: Defines the guaranteed amount of CPU (in millicores) for the container. Kubernetes will ensure this amount is always available.
• Example: 250m means the container will have at least 0.25 CPU (or 25% of a full CPU core).

resources.requests.memory

• Description: Defines the guaranteed amount of memory (in MiB) for the container. Kubernetes will reserve this memory for the container.
• Example: 256Mi means the container will have at least 256 MiB of memory.

Conclusion

This values.yml file allows configuring the deployment settings for the oc-scheduler component. Each tag plays a specific role in defining the Docker image, service configuration, and resource allocation for the container within the Kubernetes cluster.