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Kubernetes

Tips​

0.1. kubectl Editor with Visual Studio Code​

Overview​

note

One useful tip when working with Kubernetes is configuring your text editor for editing YAML files directly from the command line. If you use Visual Studio Code, you can set it as the default editor for kubectl.

Configuration​

  • This command sets the KUBE_EDITOR environment variable to use Visual Studio Code. The --wait flag tells VS Code to pause the command execution until the file is closed. Now, when you run commands like kubectl edit, it will open the file in Visual Studio Code.

    export KUBE_EDITOR='code --wait'
    kubectl edit deployment <deployment-name>

    docsOpsKubernetes001

Monitoring​

1.0. Robusta-Dev​

Overview​

note

Robusta is an open-source observability tool for Kubernetes that extends Prometheus. With automation rules, Robusta automatically fetches the data needed to investigate issues and attaches it to your alerts. Learn more at Robusta Documentation https://docs.robusta.dev/.

Installation​

  • Generate a Config

    • Robusta requires settings to function, such as a Microsoft Team Token key if you use Microsoft Team. These settings are configured as Helm values.

    • For a quick start, use the Web Installation (recommended). Create the configuration via the free Robusta UI by clicking "Create Config." docsOpsKubernetes101

    • Generate the generated_values.yaml file by registering for a free account at Robusta and connect your existing EKS cluster with your chosen chat notification (Slack, Microsoft Teams, etc.). docsOpsKubernetes102

  • Helm Installation

    • Add the Robusta Helm repository and update it:
    helm repo add robusta https://robusta-charts.storage.googleapis.com && helm repo update
    helm search repo robusta/robusta
    helm pull robusta/robusta --version 0.14.0
    • Install Robusta with the generated values file and verify the connection:
    helm upgrade \
      --install \
      --create-namespace \
      --namespace monitoring \
      --timeout 30m monitoring-robusta robusta/robusta \
      --file ./generated_values.yaml \
      --set clusterName=b-tin-eks

    docsOpsKubernetes103

Integration With Existing Prometheus​

  • Install Robusta alongside an existing Prometheus. Learn more at Extend Prometheus Installation.

  • Modify the generated_values.yaml file and reinstall Robusta with Helm

    globalConfig:
      signing_key:
      account_id:
      alertmanager_url: "http://monitoring-alert-manager.monitoring:9093"
      prometheus_url: "http://monitoring-prometheus-server.monitoring"
    sinksConfig:
      - robusta_sink:
          name: robusta_ui_sink
          token:
      - ms_teams_sink:
          name: main_msteams_sink
          webhook_url:
    enablePrometheusStack: false
    enablePlatformPlaybooks: true
    enabledManagedConfiguration: true
    runner:
      sendAdditionalTelemetry: true
      additional_env_vars: []

  • Update your existing alertmanager configuration

    apiVersion: v1
    data:
      alertmanager.yml: |
        global: {}
        receivers:
        - name: default-receiver
          webhook_configs:
          - send_resolved: true
            url: http://monitoring-prom2teams.monitoring:8089
        - name: 'robusta'
          webhook_configs:
            - url: 'http://monitoring-robusta-runner.monitoring/api/alerts'
              send_resolved: true
        route:
          group_interval: 5m
          group_wait: 10s
          receiver: default-receiver
          repeat_interval: 24h
          routes:
          - receiver: 'robusta'
            group_by: [ '...' ]
            group_wait: 1s
            group_interval: 1s
            matchers:
              - severity =~ ".*"
            repeat_interval: 4h
            continue: true
          - group_by:
            - alertname
            - priority
            matchers:
            - severity="High"
            receiver: default-receiver
            repeat_interval: 1h
          - matchers:
            - severity="Warning"
            receiver: default-receiver
            repeat_interval: 6h
      allow-snippet-annotations: "false"

    docsOpsKubernetes104

Alert Example​

  • Alerts from Robusta are sent to your configured chat notifications (e.g., Slack, Microsoft Teams) along with error logs. No need to access the ELK stack or Grafana Loki to check the error. docsOpsKubernetes105

Reference​