Add steerer Helm chart

charts/steerer/.helmignore

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+# 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
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj

charts/steerer/Chart.yaml

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+apiVersion: v1
+appVersion: "0.0.1"
+description: Steerer is a Kubernetes operator that automates the promotion of canary deployments using Istio routing for traffic shifting and Prometheus metrics for canary analysis.
+name: steerer
+version: 0.0.1

charts/steerer/README.md

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+# Steerer
+
+Steerer is a Kubernetes operator that automates the promotion of canary deployments
+using Istio routing for traffic shifting and Prometheus metrics for canary analysis.
+
+## Installing the Chart
+
+To install the chart with the release name `steerer`:
+
+```console
+$ helm upgrade --install steerer ./charts/steerer --namespace=istio-system
+```
+
+The command deploys Steerer on the Kubernetes cluster in the istio-system namespace.
+The [configuration](#configuration) section lists the parameters that can be configured during installation.
+
+## Uninstalling the Chart
+
+To uninstall/delete the `steerer` deployment:
+
+```console
+$ helm delete --purge steerer
+```
+
+The command removes all the Kubernetes components associated with the chart and deletes the release.
+
+## Configuration
+
+The following tables lists the configurable parameters of the Steerer chart and their default values.
+
+Parameter | Description | Default
+--- | --- | ---
+`image.repository` | image repository | `stefanprodan/steerer`
+`image.tag` | image tag | `<VERSION>`
+`image.pullPolicy` | image pull policy | `IfNotPresent`
+`resources.requests/cpu` | pod CPU request | `10m`
+`resources.requests/memory` | pod memory request | `32Mi`
+`resources.limits/cpu` | pod CPU limit | `1000m`
+`resources.limits/memory` | pod memory limit | `512Mi`
+`affinity` | node/pod affinities | None
+`nodeSelector` | node labels for pod assignment | `{}`
+`tolerations` | list of node taints to tolerate | `[]`
+
+Specify each parameter using the `--set key=value[,key=value]` argument to `helm upgrade`. For example,
+
+```console
+$ helm upgrade --install steerer ./charts/steerer \
+  --namespace=istio-system \
+  --set=image.tag=0.0.2
+```
+
+Alternatively, a YAML file that specifies the values for the above parameters can be provided while installing the chart. For example,
+
+```console
+$ helm upgrade --install steerer ./charts/steerer \
+  --namespace=istio-system \
+  -f values.yaml
+```
+
+> **Tip**: You can use the default [values.yaml](values.yaml)
+```
+

charts/steerer/templates/NOTES.txt

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+Steerer installed

charts/steerer/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "steerer.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "steerer.fullname" -}}
+{{- if .Values.fullnameOverride -}}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- $name := default .Chart.Name .Values.nameOverride -}}
+{{- if contains $name .Release.Name -}}
+{{- .Release.Name | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- end -}}
+{{- end -}}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "steerer.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}

charts/steerer/templates/account.yaml

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+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ template "steerer.name" . }}
+  labels:
+    app: {{ template "steerer.name" . }}
+    chart: {{ template "steerer.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}

charts/steerer/templates/crd.yaml

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+{{- if .Values.crd.create }}
+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  name: rollouts.apps.weave.works
+spec:
+  group: apps.weave.works
+  version: v1beta1
+  versions:
+    - name: v1beta1
+      served: true
+      storage: true
+  names:
+    plural: rollouts
+    singular: rollout
+    kind: Rollout
+    shortNames:
+    - roll
+  scope: Namespaced
+  validation:
+    openAPIV3Schema:
+      properties:
+        spec:
+          required:
+            - primary
+            - canary
+            - virtualService
+          properties:
+            primary:
+              properties:
+                name:
+                  type: string
+                host:
+                  type: string
+            canary:
+              properties:
+                name:
+                  type: string
+                host:
+                  type: string
+            virtualService:
+              properties:
+                name:
+                  type: string
+                weight:
+                  type: number
+            metric:
+              properties:
+                type:
+                  type: string
+                name:
+                  type: string
+                interval:
+                  type: string
+                  pattern: "^[0-9]+(m)"
+                threshold:
+                  type: number
+{{- end }}

charts/steerer/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "steerer.fullname" . }}
+  labels:
+    app: {{ include "steerer.name" . }}
+    chart: {{ include "steerer.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  replicas: 1
+  strategy:
+    type: Recreate
+  selector:
+    matchLabels:
+      app: {{ include "steerer.name" . }}
+      release: {{ .Release.Name }}
+  template:
+    metadata:
+      labels:
+        app: {{ include "steerer.name" . }}
+        release: {{ .Release.Name }}
+    spec:
+      serviceAccountName: steerer
+      containers:
+        - name: steerer
+          securityContext:
+            readOnlyRootFilesystem: true
+            runAsUser: 10001
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+          - name: http
+            containerPort: 8080
+          command:
+          - ./steerer
+          - -log-level=info
+          - -control-loop-interval={{ .Values.controlLoopInterval }}
+          - -metrics-server={{ .Values.metricsServer }}
+          livenessProbe:
+            exec:
+              command:
+              - wget
+              - --quiet
+              - --tries=1
+              - --timeout=2
+              - --spider
+              - http://localhost:8080/healthz
+          readinessProbe:
+            exec:
+              command:
+              - wget
+              - --quiet
+              - --tries=1
+              - --timeout=2
+              - --spider
+              - http://localhost:8080/healthz
+          resources:
+{{ toYaml .Values.resources | indent 12 }}
+    {{- with .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.affinity }}
+      affinity:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.tolerations }}
+      tolerations:
+{{ toYaml . | indent 8 }}
+    {{- end }}

charts/steerer/templates/rbac.yaml

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+{{- if .Values.rbac.create }}
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRole
+metadata:
+  name: {{ template "steerer.fullname" . }}
+  labels:
+    app: {{ template "steerer.name" . }}
+    chart: {{ template "steerer.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+rules:
+- apiGroups: ['*']
+  resources: ['*']
+  verbs: ['*']
+- nonResourceURLs: ['*']
+  verbs: ['*']
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ template "steerer.fullname" . }}
+  labels:
+    app: {{ template "steerer.name" . }}
+    chart: {{ template "steerer.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: {{ template "steerer.fullname" . }}
+subjects:
+- name: {{ template "steerer.name" . }}
+  namespace: {{ .Release.Namespace | quote }}
+  kind: ServiceAccount
+{{- end }}

charts/steerer/values.yaml

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+# Default values for steerer.
+
+image:
+  repository: stefanprodan/steerer
+  tag: 0.0.1
+  pullPolicy: IfNotPresent
+
+controlLoopInterval: "10s"
+metricsServer: "http://prometheus.istio-system.svc.cluster.local:9090"
+
+crd:
+  create: true
+
+rbac:
+  create: true
+
+nameOverride: ""
+fullnameOverride: ""
+
+resources:
+  limits:
+    memory: "512Mi"
+    cpu: "1000m"
+  requests:
+    memory: "32Mi"
+    cpu: "10m"
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}