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Version: 1.0.0

Kubernetes

The Managed Kubernetes service offers an optimized solution for efficiently managing server workloads. Kubernetes, now an industry standard, provides a unified and accessible API, primarily configured in YAML, making infrastructure management easier for teams.

Overview​

The Kubernetes service is built on robust software design patterns, enabling continuous recovery through the reconciliation method. It also ensures seamless scaling across multiple servers, eliminating the challenges of complex APIs from traditional virtualization platforms.

This managed solution significantly simplifies workload management by eliminating the need for custom solutions or source code modifications, saving time and effort.

Deployment Details​

The service deploys a standard Kubernetes cluster using:

  • Cluster API: For Kubernetes cluster management.
  • Kamaji: Control Plane provider.
  • KubeVirt: Infrastructure provider for virtual machine orchestration.

Workloads use worker nodes deployed as virtual machines, while the control plane runs in containers.

Available Features​

  • LoadBalancer services to manage external access.
  • Easy provisioning of persistent volumes for applications.

Useful Links:

Accessing the Deployed Cluster​

To access the deployed Kubernetes cluster, use the following command to obtain the kubeconfig file:

kubectl get secret -n <namespace> kubernetes-<clusterName>-admin-kubeconfig -o go-template='{{ printf "%s\n" (index .data "super-admin.conf" | base64decode) }}' > kubeconfig.yaml

This generates a kubeconfig.yaml file that you can use with kubectl to interact with the cluster.

Virtual Machines and Resource Series​

The worker nodes of the Kubernetes cluster are deployed as virtual machines with characteristics adapted to different workloads. These characteristics include:

  • Burstable CPU for variable workloads.
  • Hugepages to improve memory performance.
  • vCPU-To-Memory Ratios for optimal resource utilization.

For more details on virtual machine series and resources, see the Virtual Machines page.

Configurable Parameters​

General Parameters​

NameDescriptionDefault Value
hostHostname used to access the Kubernetes cluster."" (cluster name)
controlPlane.replicasNumber of replicas for control plane components.2
storageClassStorage class used for user data."replicated" or "local"

Node Group Configuration​

NameDescriptionDefault Value
nodeGroupsNode group configuration, including instance types, storage, and assigned roles.{}

Example for a node group:

nodeGroups:
  md0:
    minReplicas: 0
    maxReplicas: 10
    instanceType: "u1.medium"
    ephemeralStorage: 20Gi
    roles:
    - ingress-nginx
    resources:
      cpu: ""
      memory: ""

Available Add-ons​

The following features can be enabled to enhance the cluster capabilities:

Cert-Manager​

Automatically manages SSL/TLS certificates.

Configuration:

addons:
  certManager:
    enabled: true
    valuesOverride: {}

Ingress-NGINX Controller​

Manages HTTP/HTTPS access to the cluster.

Configuration:

addons:
  ingressNginx:
    enabled: true
    hosts:
    - example.org
    - foo.example.net
    valuesOverride: {}

Flux CD​

Implements GitOps practices for application deployment.

Configuration:

addons:
  fluxcd:
    enabled: true
    valuesOverride: {}

Monitoring Agents​

Enables integration with monitoring agents like FluentBit for log and metrics collection.

Configuration:

addons:
  monitoringAgents:
    enabled: true
    valuesOverride: {}

Additional Resources​