Upstream and replace github-actions-runner with eks/actions-runner-controller (cloudposse/terraform-aws-components#485)

* replaced github-actions-runner with eks/actions-runner-controller

* corrected variable description

* moved github-actions-runner to deprecrated, rather than deleted

* added README reference

* PR comments

* added documentation for github tokens

* corrected webhook_enabled

Author: milldr

src/README.md

@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

src/charts/actions-runner/.helmignore

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+apiVersion: v2
+name: actions-runner
+description: A Helm chart for Kubernetes
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.1.0
+
+# This chart only deploys Resources for actions-runner-controller, so app version does not really apply.
+# We use Resource API version instead.
+appVersion: "v1alpha1"

src/charts/actions-runner/Chart.yaml

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+apiVersion: actions.summerwind.dev/v1alpha1
+kind: HorizontalRunnerAutoscaler
+metadata:
+  name: {{ .Values.release_name }}
+spec:
+  # Runners in the targeted RunnerDeployment won't be scaled down
+  # for 5 minutes instead of the default 10 minutes now
+  scaleDownDelaySecondsAfterScaleOut: {{ .Values.scale_down_delay_seconds }}
+  scaleTargetRef:
+    name: {{ .Values.release_name }}
+  minReplicas: {{ .Values.min_replicas }}
+  maxReplicas: {{ .Values.max_replicas }}
+  {{- if .Values.pull_driven_scaling_enabled }}
+  metrics:
+    - type: PercentageRunnersBusy
+      scaleUpThreshold: {{ .Values.scale_up_threshold | quote }}
+      scaleDownThreshold: {{ .Values.scale_down_threshold | quote }}
+      {{- if .Values.scale_up_factor }}
+      scaleUpFactor: {{ .Values.scale_up_factor | quote }}
+      {{- else }}
+      scaleUpAdjustment: {{ .Values.scale_up_adjustment | quote }}
+      {{- end }}
+      {{- if .Values.scale_down_factor }}
+      scaleDownFactor: {{ .Values.scale_down_factor | quote }}
+      {{- else }}
+      scaleUpAdjustment: {{ .Values.scale_down_adjustment | quote }}
+      {{- end }}
+  {{- end }}
+  {{- if .Values.webhook_driven_scaling_enabled }}
+  scaleUpTriggers:
+  - githubEvent:
+      workflowJob: {}
+    amount: 1
+    duration: "{{ .Values.scale_down_delay_seconds }}s"
+  {{- end }}

src/charts/actions-runner/templates/horizontalrunnerautoscaler.yaml

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+apiVersion: actions.summerwind.dev/v1alpha1
+kind: RunnerDeployment
+metadata:
+  name: {{ .Values.release_name }}
+spec:
+  # Do not use `replicas` with HorizontalRunnerAutoscaler
+  # See https://github.com/actions-runner-controller/actions-runner-controller/issues/206#issuecomment-748601907
+  # replicas: 1
+  template:
+    spec:
+      # You could reserve nodes for runners by labeling and tainting nodes with
+      #   node-role.kubernetes.io/actions-runner
+      # and then adding the following to this RunnerDeployment
+      #
+      #  nodeSelector:
+      #    node-role.kubernetes.io/actions-runner: ""
+      #
+      #  tolerations:
+      #  - effect: NoSchedule
+      #    key: node-role.kubernetes.io/actions-runner
+      #    operator: Exists
+
+      {{ if eq .Values.type "organization" }}
+      organization: {{ .Values.scope }}
+      {{ end }}
+      {{ if eq .Values.type "repository" }}
+      repository: {{ .Values.scope }}
+      {{ end }}
+      # You can use labels to create subsets of runners.
+      # See https://github.com/summerwind/actions-runner-controller#runner-labels
+      # and https://docs.github.com/en/free-pro-team@latest/actions/hosting-your-own-runners/using-self-hosted-runners-in-a-workflow
+      labels:
+        # It appears that the webhook autoscaler requires the runner deployment
+        # to explicitly include the "self-hosted" label in order to match the
+        # workflow_job to it.
+        - self-hosted
+      {{- range .Values.labels }}
+        - {{ . | quote }}
+      {{- end }}
+      # dockerdWithinRunnerContainer = false means access to a Docker daemon is provided by a sidecar container.
+      dockerdWithinRunnerContainer: {{ .Values.dind_enabled }}
+      image: {{ .Values.image | quote }}
+      imagePullPolicy: IfNotPresent
+      serviceAccountName: {{ .Values.service_account_name }}
+      resources:
+        {{- toYaml .Values.resources | nindent 8 }}
+