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Create How_to_install_Dawarich_in_k8s.md
Example of the K8S deployment.
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Andrey Bondarenko
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docs/How_to_install_Dawarich_in_k8s.md
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# How to install Dawarich on Kubernetes
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## Prerequisites
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- Kubernetes cluster and basic kubectl knowledge.
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- Some persistent storage class prepared, in this example, Longhorn.
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- Working Postgres and Redis instances. In this example Postgres lives in 'db' namespace and Redis in 'redis' namespace.
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- Ngingx ingress controller with Letsencrypt integeation.
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- This example uses 'example.com' as a domain name, you want to change it to your own.
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## Installation
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### Namespace
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```bash
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kubectl create namespace dawarich
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```
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### Persistent volume claims
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```yaml
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---
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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namespace: dawarich
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name: public
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labels:
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storage.k8s.io/name: longhorn
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spec:
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accessModes:
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- ReadWriteOnce
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storageClassName: longhorn
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resources:
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requests:
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storage: 15Gi
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---
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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namespace: dawarich
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name: gem-cache
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labels:
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storage.k8s.io/name: longhorn
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spec:
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accessModes:
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- ReadWriteOnce
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storageClassName: longhorn
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resources:
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requests:
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storage: 15Gi
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---
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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namespace: dawarich
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name: gem-sidekiq
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labels:
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storage.k8s.io/name: longhorn
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spec:
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accessModes:
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- ReadWriteOnce
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storageClassName: longhorn
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resources:
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requests:
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storage: 15Gi
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---
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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namespace: dawarich
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name: watched
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labels:
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storage.k8s.io/name: longhorn
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spec:
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accessModes:
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- ReadWriteOnce
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storageClassName: longhorn
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resources:
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requests:
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storage: 15Gi
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```
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### Deployment
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```yaml
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: dawarich
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namespace: dawarich
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labels:
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app: dawarich
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spec:
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selector:
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matchLabels:
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app: dawarich
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template:
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metadata:
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labels:
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app: dawarich
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spec:
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containers:
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- name: dawarich
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env:
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- name: TIME_ZONE
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value: "Europe/Prague"
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- name: RAILS_ENV
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value: development
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- name: REDIS_URL
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value: redis://redis-master.redis.svc.cluster.local:6379/10
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- name: REDIS_PASSWORD
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valueFrom:
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secretKeyRef:
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name: redis-password
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key: redis-password
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- name: DATABASE_HOST
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value: postgres-postgresql.db.svc.cluster.local
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- name: DATABASE_PORT
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value: "5432"
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- name: DATABASE_USERNAME
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value: postgres
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- name: DATABASE_PASSWORD
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value: Password123!
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- name: DATABASE_NAME
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value: dawarich_development
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- name: MIN_MINUTES_SPENT_IN_CITY
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value: "60"
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- name: APPLICATION_HOST
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value: localhost
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- name: APPLICATION_HOSTS
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value: "dawarich.example.com, localhost"
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- name: APPLICATION_PROTOCOL
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value: http
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- name: DISTANCE_UNIT
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value: km
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- name: PHOTON_API_HOST
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value: photon.komoot.io
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- name: PHOTON_API_USE_HTTPS
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value: "true"
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- name: RAILS_MIN_THREADS
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value: "5"
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- name: RAILS_MAX_THREADS
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value: "10"
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image: freikin/dawarich:0.16.4
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imagePullPolicy: Always
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volumeMounts:
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- mountPath: /usr/local/bundle/gems_app
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name: gem-cache
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- mountPath: /var/app/public
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name: public
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- mountPath: /var/app/tmp/imports/watched
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name: watched
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command:
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- "dev-entrypoint.sh"
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args:
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- "bin/rails server -p 3000 -b 0.0.0.0"
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resources:
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requests:
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memory: "1Gi"
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cpu: "250m"
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limits:
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memory: "3Gi"
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cpu: "2000m"
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ports:
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- containerPort: 3000
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- name: dawarich-sidekiq
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env:
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- name: RAILS_ENV
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value: development
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- name: REDIS_URL
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value: redis://redis-master.redis.svc.cluster.local:6379/10
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- name: DATABASE_HOST
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value: postgres-postgresql.db.svc.cluster.local
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- name: DATABASE_PORT
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value: "5432"
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- name: DATABASE_USERNAME
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value: postgres
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- name: DATABASE_PASSWORD
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value: Password123!
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- name: DATABASE_NAME
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value: dawarich_development
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- name: RAILS_MIN_THREADS
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value: "5"
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- name: RAILS_MAX_THREADS
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value: "10"
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- name: BACKGROUND_PROCESSING_CONCURRENCY
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value: "20"
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- name: APPLICATION_HOST
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value: localhost
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- name: APPLICATION_HOSTS
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value: "dawarich.example.com, localhost"
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- name: APPLICATION_PROTOCOL
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value: http
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- name: DISTANCE_UNIT
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value: km
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- name: PHOTON_API_HOST
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value: photon.komoot.io
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- name: PHOTON_API_USE_HTTPS
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value: "true"
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image: freikin/dawarich:0.16.4
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imagePullPolicy: Always
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volumeMounts:
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- mountPath: /usr/local/bundle/gems_sidekiq
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name: gem-sidekiq
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- mountPath: /var/app/public
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name: public
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- mountPath: /var/app/tmp/imports/watched
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name: watched
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command:
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- "dev-entrypoint.sh"
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args:
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- "sidekiq"
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resources:
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requests:
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memory: "1Gi"
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cpu: "250m"
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limits:
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memory: "3Gi"
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cpu: "1500m"
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volumes:
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- name: gem-cache
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persistentVolumeClaim:
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claimName: gem-cache
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- name: gem-sidekiq
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persistentVolumeClaim:
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claimName: gem-sidekiq
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- name: public
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persistentVolumeClaim:
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claimName: public
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- name: watched
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persistentVolumeClaim:
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claimName: watched
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```
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### Service and Ingress
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```yaml
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---
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apiVersion: v1
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kind: Service
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metadata:
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namespace: dawarich
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labels:
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service: dawarich
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name: dawarich
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spec:
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ports:
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- protocol: TCP
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port: 3000
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targetPort: 3000
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selector:
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app: dawarich
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---
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---
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apiVersion: networking.k8s.io/v1
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kind: Ingress
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metadata:
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namespace: dawarich
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name: dawarich-ingress
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annotations:
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kubernetes.io/ingress.class: "nginx"
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cert-manager.io/cluster-issuer: letsencrypt-prod
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nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
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nginx.ingress.kubernetes.io/rewrite-target: /
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nginx.ingress.kubernetes.io/proxy-body-size: 1000m
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spec:
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tls:
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- hosts:
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- dawarich.example.com
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secretName: letsencrypt-prod
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rules:
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- host: dawarich.example.com
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http:
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paths:
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- path: /
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pathType: Prefix
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backend:
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service:
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name: dawarich
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port:
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number: 3000
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```
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