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README.md
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README.md
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# Snippets for k3s
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* [Install k3s](#install-k3s)
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* [Namespaces and resource limits](#namespaces)
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* [devel](#namespace-devel)
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* [staging](#namespace-staging)
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* [prod](#namespace-prod)
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* [Persistent volumes](#pv)
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* [Local provider](#pv-local)
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* [Longhorn - distributed/lightweight provider](#pv-longhorn)
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* [Disable Traefik-ingress](#disable-traefik-ingress)
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* [Enable NGINX-ingress](#enable-nginx-ingress)
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* [Installation](#install-nginx-ingress)
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@ -11,13 +18,6 @@
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* [Stick the nginx-ingress controler and my-nginx app together](#stick-nginx-ingress-and-tcp-service)
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* [Test exposed app on TCP-port 9000](#test-nginx-ingress-and-tcp-service)
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* [Running DaemonSets on `hostPort`](#running-daemonsets)
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* [Namespaces and resource limits](#namespaces)
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* [devel](#namespace-devel)
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* [staging](#namespace-staging)
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* [prod](#namespace-prod)
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* [Persistent volumes](#pv)
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* [Local provider](#pv-local)
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* [Longhorn - distributed/lightweight provider](#pv-longhorn)
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* [HELM charts](#helm)
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* [Create a chart](#helm-create)
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* [Install local chart without packaging](#helm-install-without-packaging)
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* [Get deployment history](#helm-history)
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* [Rollback](#helm-rollback)
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## Install k3s <a name="install-k3s"></a>
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https://k3s.io/:
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```
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curl -sfL https://get.k3s.io | sh -
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```
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# Namespaces and resource limits <a name="namespaces"></a>
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## devel <a name="namespace-devel"></a>
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namespace-devel-limitranges.yaml:
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```
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---
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apiVersion: v1
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kind: Namespace
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metadata:
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name: devel
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labels:
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name: devel
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---
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apiVersion: v1
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kind: LimitRange
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metadata:
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name: limit-range-devel
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namespace: devel
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spec:
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limits:
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- default:
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cpu: 500m
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memory: 1Gi
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defaultRequest:
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cpu: 10m
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memory: 4Mi
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max:
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cpu: 500m
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memory: 1Gi
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min:
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cpu: 10m
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memory: 4Mi
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type: Container
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```
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`kubectl apply -f namespace-devel-limitranges.yaml`
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## staging <a name="namespace-staging"></a>
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namespace-staging.yml:
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```
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---
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apiVersion: v1
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kind: Namespace
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metadata:
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name: staging
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labels:
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name: staging
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```
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`kubectl apply -f namespace-staging.yml`
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namespace-staging-limitranges.yaml:
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```
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apiVersion: v1
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kind: LimitRange
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metadata:
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name: limit-range-staging
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spec:
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limits:
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- default:
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cpu: 500m
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memory: 1Gi
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defaultRequest:
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cpu: 10m
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memory: 4Mi
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max:
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cpu: 500m
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memory: 1Gi
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min:
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cpu: 10m
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memory: 4Mi
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type: Container
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```
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`kubectl apply -f namespace-staging-limitranges.yaml -n staging`
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## prod <a name="namespace-prod"></a>
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namespace-prod.yml:
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```
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---
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apiVersion: v1
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kind: Namespace
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metadata:
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name: prod
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labels:
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name: prod
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```
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`kubectl apply -f namespace-prod.yml`
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namespace-prod-limitranges.yaml:
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```
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apiVersion: v1
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kind: LimitRange
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metadata:
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name: limit-range-prod
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spec:
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limits:
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- defaultRequest:
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cpu: 50m
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memory: 4Mi
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min:
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cpu: 50m
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memory: 4Mi
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type: Container
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```
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`kubectl apply -f namespace-prod-limitranges.yaml -n prod`
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# Persistent Volumes <a name="pv"></a>
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## Local provider (local - ouf-of-the-box) <a name="pv-local"></a>
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https://rancher.com/docs/k3s/latest/en/storage/
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## Longhorn (lightweight/distributed) <a name="pv-longhorn"></a>
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* Requirements: https://longhorn.io/docs/0.8.0/install/requirements/
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* Debian: `apt install open-iscsi`
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* Install: https://rancher.com/docs/k3s/latest/en/storage/
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## Disable Traefik-ingress <a name="disable-traefik-ingress"></a>
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edit /etc/systemd/system/k3s.service:
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```
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@ -327,122 +441,6 @@ spec:
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type: RollingUpdate
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```
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# Namespaces and resource limits <a name="namespaces"></a>
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## devel <a name="namespace-devel"></a>
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namespace-devel.yml:
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```
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---
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apiVersion: v1
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kind: Namespace
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metadata:
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name: devel
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labels:
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name: devel
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```
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`kubectl apply -f namespace-devel.yml`
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namespace-devel-limitranges.yaml:
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```
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apiVersion: v1
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kind: LimitRange
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metadata:
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name: limit-range-devel
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spec:
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limits:
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- default:
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cpu: 500m
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memory: 1Gi
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defaultRequest:
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cpu: 10m
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memory: 4Mi
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max:
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cpu: 500m
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memory: 1Gi
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min:
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cpu: 10m
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memory: 4Mi
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type: Container
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```
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`kubectl apply -f namespace-devel-limitranges.yaml -n devel`
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## staging <a name="namespace-staging"></a>
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namespace-staging.yml:
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```
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---
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apiVersion: v1
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kind: Namespace
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metadata:
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name: staging
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labels:
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name: staging
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```
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`kubectl apply -f namespace-staging.yml`
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namespace-staging-limitranges.yaml:
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```
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apiVersion: v1
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kind: LimitRange
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metadata:
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name: limit-range-staging
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spec:
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limits:
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- default:
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cpu: 500m
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memory: 1Gi
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defaultRequest:
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cpu: 10m
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memory: 4Mi
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max:
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cpu: 500m
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memory: 1Gi
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min:
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cpu: 10m
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memory: 4Mi
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type: Container
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```
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`kubectl apply -f namespace-staging-limitranges.yaml -n staging`
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## prod <a name="namespace-prod"></a>
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namespace-prod.yml:
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```
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---
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apiVersion: v1
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kind: Namespace
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metadata:
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name: prod
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labels:
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name: prod
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```
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`kubectl apply -f namespace-prod.yml`
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namespace-prod-limitranges.yaml:
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```
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apiVersion: v1
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kind: LimitRange
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metadata:
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name: limit-range-prod
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spec:
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limits:
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- defaultRequest:
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cpu: 50m
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memory: 4Mi
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min:
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cpu: 50m
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memory: 4Mi
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type: Container
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```
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`kubectl apply -f namespace-prod-limitranges.yaml -n prod`
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# Persistent Volumes <a name="pv"></a>
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## Local provider (local - ouf-of-the-box) <a name="pv-local"></a>
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https://rancher.com/docs/k3s/latest/en/storage/
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## Longhorn (lightweight/distributed) <a name="pv-longhorn"></a>
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* Requirements: https://longhorn.io/docs/0.8.0/install/requirements/
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* Debian: `apt install open-iscsi`
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* Install: https://rancher.com/docs/k3s/latest/en/storage/
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# HELM charts <a name="helm"></a>
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Docs:
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* https://helm.sh/docs/intro/using_helm/
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