Install metrics-server (#1)

Reviewed-on: https://git.badhouseplants.net/badhouseplants/k8s-cluster-config/pulls/1

.drone.yml

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+---
+# ----------------------------------------------
+# -- Helmfile diff changes
+# ----------------------------------------------
+kind: pipeline
+type: kubernetes
+name: Show helmfile diffs
+
+trigger:
+  branch:
+    exclude: 
+      - main
+  event:
+  - push
+
+steps:
+- name: Diff badhouseplants
+  image: ghcr.io/helmfile/helmfile:canary
+  environment:
+    KUBECONFIG_CONTENT:
+      from_secret: KUBECONFIG_CONTENT
+  commands:
+    - mkdir $HOME/.kube
+    - echo $KUBECONFIG_CONTENT | base64 -d > $HOME/.kube/config
+    - helmfile -e badhouseplants diff
+
+- name: Diff eterosoft
+  image: ghcr.io/helmfile/helmfile:canary
+  environment:
+    KUBECONFIG_CONTENT:
+      from_secret: KUBECONFIG_CONTENT
+  commands:
+    - mkdir $HOME/.kube
+    - echo $KUBECONFIG_CONTENT | base64 -d > $HOME/.kube/config
+    - helmfile -e etersoft diff
+
+---
+# ----------------------------------------------
+# -- Helmfile apply changes
+# ----------------------------------------------
+kind: pipeline
+type: kubernetes
+name: Apply helmfile changes
+
+trigger:
+  branch:
+    - main
+  event:
+  - push
+
+steps:
+- name: Diff badhouseplants
+  image: ghcr.io/helmfile/helmfile:canary
+  environment:
+    KUBECONFIG_CONTENT:
+      from_secret: KUBECONFIG_CONTENT
+  commands:
+    - mkdir $HOME/.kube
+    - echo $KUBECONFIG_CONTENT | base64 -d > $HOME/.kube/config
+    - helmfile -e badhouseplants apply
+
+- name: Diff eterosoft
+  image: ghcr.io/helmfile/helmfile:canary
+  environment:
+    KUBECONFIG_CONTENT:
+      from_secret: KUBECONFIG_CONTENT
+  commands:
+    - mkdir $HOME/.kube
+    - echo $KUBECONFIG_CONTENT | base64 -d > $HOME/.kube/config
+    - helmfile -e etersoft apply
+

README.md

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+# Kubernetes configuration
+[![Build Status](https://drone.badhouseplants.net/api/badges/badhouseplants/k8s-cluster-config/status.svg)](https://drone.badhouseplants.net/badhouseplants/k8s-cluster-config)

badhouseplants/values/values.openvpn.yaml

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+storageClassName: longhorn
+openvpn:
+  server: "tcp://195.201.250.50:1194"
+service:
+  type: ClusterIP
+  port: 1194
+  targetPort: 1194
+  protocol: TCP

common/values.metrics-server.yaml

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+apiService:
+  insecureSkipTLSVerify: true
+args:
+  - --kubelet-insecure-tls

environments.yaml

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+environments:
+  badhouseplants:
+    kubeContext: allanger@badhouseplants-microk8s
+  etersoft:
+    kubeContext: allanger@etersoft

etersoft/values/values.openvpn.yaml

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+storageClassName: microk8s-hostpath
+openvpn:
+  server: "tcp://91.232.225.63:1194"
+service:
+  type: ClusterIP
+  port: 1194
+  targetPort: 1194
+  protocol: TCP
+istio-resources:
+  enabled: true
+  gateways:
+    - metadata:
+        name: etersoft-vpn
+        namespace: istio-system
+      spec:
+        selector: 
+          istio: ingressgateway
+        servers: 
+          - hosts:
+              - '*'
+            port:
+              name: openvpn
+              number: 1194
+              protocol: TCP
+                #    virtual_services:
+                #      - metadata: 
+                #          name: openvpn
+                #        spec:
+                #          hosts:
+                #            - '*'
+                #          gateways:
+                #            - istio-system/etersoft-vpn
+                #          tcp:
+                #            - match:
+                #                - port: 1194
+                #                  route:
+                #                    - destination:
+                #                        host: openvpn
+                #                        port:
+                #                        number: 1194
+                #
+                #
+                #

helmfile.yaml

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+---
+{{ readFile "releases.yaml" }}
+
+bases:
+  - environments.yaml
+  - repositories.yaml
+
+releases:
+  - <<: *metrics-server 
+    installed: true
+    namespace: kube-system
+    createNamespace: false
+
+helmfiles:
+  - path: {{.Environment.Name }}/helmfile.yaml

releases.yaml

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+---
+templates:
+  crd-management-hook:
+    hooks: 
+      - events: ["preapply"]
+        showlogs: true
+        command: "sh"
+        args: 
+          - -c 
+          - "helm show crds {{ .Release.Chart }} --version {{ .Release.Version }}| kubectl apply -f -"
+      - events: ["prepare"]
+        showlogs: true
+        command: "sh"
+        args: 
+          - -c 
+          - "helm show crds {{ .Release.Chart }} --version {{ .Release.Version }} | kubectl diff -f - || true"
+      - events: ["postuninstall"]
+        showlogs: true
+        command: "sh"
+        args: 
+          - -c 
+          - "helm show crds {{ .Release.Chart }} --version {{ .Release.Version }} | kubectl delete -f -"
+  # ----------------------------
+  # -- Releases
+  # ----------------------------
+  metrics-server: &metrics-server
+    name: metrics-server
+    chart: metrics-server/metrics-server
+    version: 3.8.3
+    values:
+      - common/values.{{ .Release.Name }}.yaml
+    inherit:
+      - template: crd-management-hook
+
+  openvpn: &openvpn
+    name: openvpn
+    chart: allanger-charts/openvpn
+    version: 1.0.1
+    values: 
+      - "{{ .Environment.Name }}/values/values.{{ .Release.Name }}.yaml"

repositories.yaml

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+---
+repositories:
+  - name: metrics-server
+    url: https://kubernetes-sigs.github.io/metrics-server/
+  - name: allanger-charts
+    url: https://allanger.github.io/allanger-charts