Merge pull request #1 from deislabs/grampelberg/scaffold

Implement metrics.smi-spec.io for Linkerd

.dockerignore

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+tmp
+*.yml
+*.yaml
+Makefile
+Tiltfile
+*.md
+chart

.gitignore

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+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Output of swag generator
+pkg/docs
+
+tmp
+
+.vscode

.golangci.yml

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+linters:
+  enable-all: true
+  disable:
+    - maligned
+    - prealloc
+    - gochecknoglobals
+
+  skip-dirs:
+    # ignore the system libraries
+    - libexec/src/strings
+
+linters-settings:
+  govet:
+    check-shadowing: true
+  golint:
+    min-confidence: 0
+  gocyclo:
+    min-complexity: 10
+  maligned:
+    suggest-new: true
+  dupl:
+    threshold: 100
+  goconst:
+    min-len: 2
+    min-occurrences: 2
+  misspell:
+    locale: US
+  lll:
+    line-length: 140
+  goimports:
+    local-prefixes: github.com/golangci/golangci-lint
+  gocritic:
+    enabled-tags:
+      - performance
+      - style
+      - experimental
+    disabled-checks:
+      - wrapperFunc
+      - dupImport # https://github.com/go-critic/go-critic/issues/845
+      - rangeValCopy

Dockerfile

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+FROM golang:1.12-alpine as builder
+ARG NETRC
+
+WORKDIR /src
+
+RUN apk add --no-cache \
+    git
+
+COPY go.mod .
+COPY go.sum .
+
+RUN echo "${NETRC}" > ~/.netrc
+RUN go mod download
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build ./cmd/smi-metrics/...
+
+FROM scratch
+
+WORKDIR /src
+
+COPY --from=builder /src/smi-metrics /
+
+CMD /smi-metrics

Makefile

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+ROOT_DIR := $(shell dirname $(realpath $(firstword $(MAKEFILE_LIST))))
+
+HAS_TILT := $(shell command -v tilt;)
+
+TAG := $(shell git describe --exact-match --tags $(git log -n1 --pretty='%h'))
+
+IMAGE := thomasr/smi-metrics
+
+.PHONY: bootstrap
+bootstrap:
+	@# Bootstrap the required binaries
+ifndef HAS_TILT
+	echo "Install tilt from https://docs.tilt.dev/install.html"
+endif
+
+.PHONY: dev
+dev: bootstrap
+	tilt up
+
+.PHONY: push
+push: build
+	docker push $(IMAGE):$(TAG)
+
+.PHONY: build
+build:
+	NETRC=$$(cat ~/.netrc) && \
+		docker build --build-arg NETRC -t $(IMAGE):$(TAG) .

README.md

@@ -1,8 +1,10 @@
 ## Running
 
-Take a look at [k8s/dev.yaml](k8s/dev.yaml). The image will either need to be
-local or hosted elsewhere (not currently public). Change `prometheus-url` to
-point to where it is installed.
+For the defaults, run:
+
+```bash
+helm template chart --name dev | kubectl apply -f -
+```
 
 ## Development
 

Tiltfile

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+k8s_yaml(local("helm template chart -f dev.yaml --name dev"))
+watch_file('chart')
+
+docker_build('thomasr/smi-metrics', '.', build_args={
+    'NETRC': str(local('cat ~/.netrc'))
+})
+
+k8s_resource('dev-smi-metrics', port_forwards=['8080:8080', '8081:8081'])

bin/wait.sh

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+#!/bin/sh -x
+
+exit_script() {
+    echo "Shutting down..."
+    trap - EXIT HUP INT QUIT PIPE TERM # clear the trap
+    kill -- -$$ # Sends SIGTERM to child/sub processes
+}
+
+trap exit_script EXIT HUP INT QUIT PIPE TERM
+
+echo "Sleeping.  Pid=$$"
+sleep 2147483647 &
+
+# Install dev helpers
+apk add --no-cache \
+  alpine-sdk
+
+go mod download
+
+wait $!

chart/.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
+.vscode/

chart/Chart.yaml

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+apiVersion: v1
+appVersion: "0.1"
+description: Provider for metrics.smi-spec.io
+name: smi-metrics
+version: 0.1.0

chart/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "smi-metrics.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 "smi-metrics.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 "smi-metrics.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}

chart/templates/apiservice.yaml

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+{{- $cn :=  list (include "smi-metrics.fullname" .) .Release.Namespace "svc" | join "." -}}
+{{- $ca := genCA $cn 365 -}}
+{{- $cert := genSignedCert $cn nil nil 365 $ca -}}
+apiVersion: apiregistration.k8s.io/v1beta1
+kind: APIService
+metadata:
+  labels:
+    app.kubernetes.io/name: {{ include "smi-metrics.name" . }}
+    helm.sh/chart: {{ include "smi-metrics.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+  name: v1alpha1.metrics.smi-spec.io
+spec:
+  service:
+    name: {{ include "smi-metrics.fullname" . }}
+    namespace: {{ .Release.Namespace }}
+  caBundle: {{ b64enc $ca.Cert }}
+  group: metrics.smi-spec.io
+  version: v1alpha1
+  insecureSkipTLSVerify: false
+  groupPriorityMinimum: 100
+  versionPriority: 100
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  labels:
+    app.kubernetes.io/name: {{ include "smi-metrics.name" . }}
+    helm.sh/chart: {{ include "smi-metrics.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+  name: {{ include "smi-metrics.fullname" . }}
+type: kubernetes.io/tls
+data:
+  tls.crt: {{ b64enc $cert.Cert }}
+  tls.key: {{ b64enc $cert.Key }}

chart/templates/config.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  labels:
+    app.kubernetes.io/name: {{ include "smi-metrics.name" . }}
+    helm.sh/chart: {{ include "smi-metrics.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+  name: {{ include "smi-metrics.fullname" . }}
+data:
+  config.yml: |
+    {{- .Values.config | toYaml | nindent 4 }}

chart/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "smi-metrics.fullname" . }}
+  labels:
+    app.kubernetes.io/name: {{ include "smi-metrics.name" . }}
+    helm.sh/chart: {{ include "smi-metrics.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: {{ include "smi-metrics.name" . }}
+      app.kubernetes.io/instance: {{ .Release.Name }}
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: {{ include "smi-metrics.name" . }}
+        app.kubernetes.io/instance: {{ .Release.Name }}
+    spec:
+      containers:
+        - name: shim
+          image: {{ .Values.image.name }}
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+
+          command:
+            - /smi-metrics
+            - --config=/config.yml
+
+          ports:
+            - containerPort: 8080
+              name: api
+              protocol: TCP
+            - containerPort: 8081
+              name: admin
+              protocol: TCP
+
+          volumeMounts:
+            - name: config
+              mountPath: /config.yml
+              subPath: config.yml
+            - mountPath: /var/run/smi-metrics
+              name: tls
+              readOnly: true
+
+          {{ if .Values.probes }}
+          livenessProbe:
+            httpGet:
+              path: /status
+              port: 8081
+          readinessProbe:
+            httpGet:
+              path: /status
+              port: 8081
+          {{ end }}
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+
+      volumes:
+        - name: config
+          configMap:
+            name: {{ include "smi-metrics.fullname" . }}
+        - name: tls
+          secret:
+            secretName: {{ include "smi-metrics.fullname" . }}

chart/templates/rbac.yaml

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+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  labels:
+    app.kubernetes.io/name: {{ include "smi-metrics.name" . }}
+    helm.sh/chart: {{ include "smi-metrics.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+  name: {{ include "smi-metrics.fullname" . }}
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  labels:
+    app.kubernetes.io/name: {{ include "smi-metrics.name" . }}
+    helm.sh/chart: {{ include "smi-metrics.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+  name: {{ include "smi-metrics.fullname" . }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: extension-apiserver-authentication-reader
+subjects:
+- kind: ServiceAccount
+  name: {{ include "smi-metrics.fullname" . }}
+  namespace: {{ .Release.Namespace }}
+---

chart/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "smi-metrics.fullname" . }}
+  labels:
+    app.kubernetes.io/name: {{ include "smi-metrics.name" . }}
+    helm.sh/chart: {{ include "smi-metrics.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+spec:
+  ports:
+    - port: 443
+      targetPort: api
+      protocol: TCP
+  selector:
+    app.kubernetes.io/name: {{ include "smi-metrics.name" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}