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About

Application can be deployed to a kubernetes cluster

Architecture diagram

Technology stack

Dependent technology stack:

  • Kubernetes (pods, jobs, services, persistent storage, ingress)
  • Elasticsearch
  • Grafana
  • Python3

Deployment manifest

Available here.

Deploy in Kubernetes

This document describes how to deploy the application in Kubernetes.

Variables used in the manifest:

  • __GITHUB_PAT__
  • __GRAFANA_USERNAME__
  • __GRAFANA_PASSWORD__
  • __ORGANIZATION_SLUGS__

Replacement can be done using envsubst tool:

export __GITHUB_PAT__=your_pat
export __GRAFANA_USERNAME__=your_user
export __GRAFANA_PASSWORD__=your_pass
export __ORGANIZATION_SLUGS__=your_orgs

envsubst < deploy/aks-deployment.yml | kubectl apply -f -

Deployment in Azure Kubernetes Service - AKS

If you're using Azure Kubernetes Service - AKS:

  1. Enable App Routing
  2. Update variables.
  3. Apply the manifest in your cluster.

Deployment in non-Azure Kubernetes cluster

  1. Update PVC (Persitent Volume Claim) to one supported in your cluster
  2. Update Ingress
  3. Update variables.
  4. Apply the manifest in your cluster.

Troubleshooting Grafana "database is locked" Error

Grafana database can lock which can cause container to fail, see Grafana, SQLite, and database is locked

Use following Job to unlock the database.

---
apiVersion: batch/v1
kind: Job
metadata:
  name: fix-grafana-once
spec:
  template:
    spec:
      containers:
        - name: fix-grafana
          image: keinos/sqlite3
          imagePullPolicy: IfNotPresent
          command:
          - "/bin/sh"
          - "-c"
          - "/usr/bin/sqlite3 /var/lib/grafana/grafana.db '.clone /var/lib/grafana/grafana.db.clone'; mv /var/lib/grafana/grafana.db.clone /var/lib/grafana/grafana.db; chmod a+w /var/lib/grafana/grafana.db"
          volumeMounts:
            - name: grafana-data
              mountPath: /var/lib/grafana
              subPath: grafana
          securityContext:
            runAsUser: 0
          resources:
            requests:
              cpu: "0.25"
              memory: "256Mi"
            limits:
              cpu: "0.5"
              memory: "512Mi"
      restartPolicy: Never
      volumes:
        - name: grafana-data
          persistentVolumeClaim:
            claimName: shared-pvc

Force restart grafana container after to re-create.