feat: dev env (#1)

Reviewed-on: #1

Makefile

@@ -14,3 +14,6 @@ install-tools: install-golangci-lint
 
 .PHONY: install
 install: install-tools install-git-hooks
+
+generate:
+	go generate ./...

build/docker/dcbot/dev/Dockerfile

@@ -0,0 +1,18 @@
+FROM golang:1.19 as builder
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+# `skaffold debug` sets SKAFFOLD_GO_GCFLAGS to disable compiler optimizations
+ARG SKAFFOLD_GO_GCFLAGS
+RUN go build -gcflags="${SKAFFOLD_GO_GCFLAGS}" -o dcbot ./cmd/dcbot/main.go
+
+FROM ubuntu:22.04
+# Define GOTRACEBACK to mark this container as using the Go language runtime
+# for `skaffold debug` (https://skaffold.dev/docs/workflows/debug/).
+WORKDIR /root
+ENV GOTRACEBACK=single
+RUN apt update
+RUN apt install -y ca-certificates tzdata
+COPY --from=builder /app/dcbot .
+ENTRYPOINT ["./dcbot"]

cmd/dcbot/internal/run/run.go

@@ -0,0 +1,70 @@
+package run
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"gitea.dwysokinski.me/twhelp/dcbot/internal/discord"
+	"github.com/kelseyhightower/envconfig"
+	"github.com/urfave/cli/v2"
+	"go.uber.org/zap"
+)
+
+const (
+	healthyFilePath = "/tmp/healthy"
+	healthyFilePerm = 0644
+)
+
+func New() *cli.Command {
+	return &cli.Command{
+		Name:  "run",
+		Usage: "Runs the dc bot",
+		Action: func(c *cli.Context) error {
+			logger := zap.L()
+
+			cfg, err := newBotConfig()
+			if err != nil {
+				return fmt.Errorf("newBotConfig: %w", err)
+			}
+
+			bot, err := discord.NewBot(cfg.Token)
+			if err != nil {
+				return fmt.Errorf("discord.NewBot: %w", err)
+			}
+			defer func() {
+				_ = bot.Close()
+			}()
+
+			if err := os.WriteFile(healthyFilePath, []byte("healthy"), healthyFilePerm); err != nil {
+				return fmt.Errorf("couldn't create file (path=%s): %w", healthyFilePath, err)
+			}
+
+			logger.Info("Bot is up and running")
+
+			waitForSignal(c.Context)
+
+			return nil
+		},
+	}
+}
+
+type botConfig struct {
+	Token string `envconfig:"TOKEN" required:"true"`
+}
+
+func newBotConfig() (botConfig, error) {
+	var cfg botConfig
+	if err := envconfig.Process("BOT", &cfg); err != nil {
+		return botConfig{}, fmt.Errorf("envconfig.Process: %w", err)
+	}
+	return cfg, nil
+}
+
+func waitForSignal(ctx context.Context) {
+	ctx, stop := signal.NotifyContext(ctx, os.Interrupt, syscall.SIGTERM)
+	defer stop()
+	<-ctx.Done()
+}

cmd/dcbot/main.go

@@ -7,6 +7,7 @@ import (
 	"gitea.dwysokinski.me/twhelp/dcbot/cmd/dcbot/internal"
 	"gitea.dwysokinski.me/twhelp/dcbot/cmd/dcbot/internal/appmode"
 	"gitea.dwysokinski.me/twhelp/dcbot/cmd/dcbot/internal/db"
+	"gitea.dwysokinski.me/twhelp/dcbot/cmd/dcbot/internal/run"
 	"github.com/urfave/cli/v2"
 )
 
@@ -50,6 +51,7 @@ func newApp(mode string) *cli.App {
 	}
 	app.Commands = []*cli.Command{
 		db.New(),
+		run.New(),
 	}
 	return app
 }

go.mod

@@ -3,6 +3,7 @@ module gitea.dwysokinski.me/twhelp/dcbot
 go 1.19
 
 require (
+	github.com/bwmarrin/discordgo v0.26.1
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/stretchr/testify v1.8.0
 	github.com/uptrace/bun v1.1.8
@@ -18,6 +19,7 @@ require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/go-logr/logr v1.2.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
+	github.com/gorilla/websocket v1.4.2 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect

go.sum

@@ -1,4 +1,6 @@
 github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
+github.com/bwmarrin/discordgo v0.26.1 h1:AIrM+g3cl+iYBr4yBxCBp9tD9jR3K7upEjl0d89FRkE=
+github.com/bwmarrin/discordgo v0.26.1/go.mod h1:NJZpH+1AfhIcyQsPeuBKsUtYrRnjkyu0kIVMCHkZtRY=
 github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
 github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -10,6 +12,8 @@ github.com/go-logr/logr v1.2.3/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbV
 github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/google/go-cmp v0.5.8 h1:e6P7q2lk1O+qJJb4BtCQXlK8vWEO8V1ZeuEdJNOqZyg=
+github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
+github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD/E=
 github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
 github.com/kelseyhightower/envconfig v1.4.0 h1:Im6hONhd3pLkfDFsbRgu68RDNkGF1r3dvMUtDTo2cv8=
@@ -59,10 +63,16 @@ go.uber.org/multierr v1.6.0 h1:y6IPFStTAIT5Ytl7/XYmHvzXQ7S3g/IeZW9hyZ5thw4=
 go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU=
 go.uber.org/zap v1.23.0 h1:OjGQ5KQDEUawVHxNwQgPpiypGHOxo2mNZsOqTak4fFY=
 go.uber.org/zap v1.23.0/go.mod h1:D+nX8jyLsMHMYrln8A0rJjFt/T/9/bGgIhAqxv5URuY=
+golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
 golang.org/x/crypto v0.0.0-20220826181053-bd7e27e6170d h1:3qF+Z8Hkrw9sOhrFHti9TlB1Hkac1x+DNRkv0XQiFjo=
 golang.org/x/crypto v0.0.0-20220826181053-bd7e27e6170d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64 h1:UiNENfZ8gDvpiWw7IpOMQ27spWmThO1RwwdQVbJahJM=
 golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

internal/discord/bot.go

@@ -0,0 +1,26 @@
+package discord
+
+import (
+	"fmt"
+
+	"github.com/bwmarrin/discordgo"
+)
+
+type Bot struct {
+	s *discordgo.Session
+}
+
+func NewBot(token string) (*Bot, error) {
+	s, err := discordgo.New("Bot " + token)
+	if err != nil {
+		return nil, fmt.Errorf("discordgo.New: %w", err)
+	}
+	if err = s.Open(); err != nil {
+		return nil, fmt.Errorf("s.Open: %w", err)
+	}
+	return &Bot{s: s}, nil
+}
+
+func (b *Bot) Close() error {
+	return b.s.Close()
+}

k8s/base/bot.yml

@@ -0,0 +1,46 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: twhelp-dcbot-deployment
+spec:
+  selector:
+    matchLabels:
+      app: twhelp-dcbot
+  template:
+    metadata:
+      labels:
+        app: twhelp-dcbot
+    spec:
+      containers:
+        - name: twhelp-dcbot
+          image: dcbot
+          args: ["run"]
+          env:
+            - name: APP_MODE
+              value: development
+            - name: DB_DSN
+              valueFrom:
+                secretKeyRef:
+                  name: twhelp-dcbot-secret
+                  key: db-dsn
+            - name: DB_MAX_OPEN_CONNECTIONS
+              value: "10"
+            - name: DB_MAX_IDLE_CONNECTIONS
+              value: "2"
+            - name: BOT_TOKEN
+              valueFrom:
+                secretKeyRef:
+                  name: twhelp-dcbot-secret
+                  key: token
+          livenessProbe:
+            exec:
+              command: [ "cat", "/tmp/healthy" ]
+            initialDelaySeconds: 5
+            periodSeconds: 5
+          resources:
+            requests:
+              cpu: 100m
+              memory: 100Mi
+            limits:
+              cpu: 400m
+              memory: 400Mi

k8s/base/kustomization.yml

@@ -0,0 +1,8 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - bot.yml
+images:
+  - name: dcbot
+    newName: dcbot
+    newTag: latest

k8s/overlays/dev/.gitignore

@@ -0,0 +1 @@
+secret.yml

k8s/overlays/dev/kustomization.yml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+nameSuffix: -dev
+resources:
+  - secret.yml
+  - ../../base

k8s/overlays/dev/secret.example.yml

@@ -0,0 +1,9 @@
+apiVersion: v1
+kind: Secret
+metadata:
+  name: twhelp-dcbot-secret
+type: Opaque
+data:
+  # postgres://dcbot:dcbot@twdcbotdb-postgresql:5432/dcbot?sslmode=disable
+  db-dsn: cG9zdGdyZXM6Ly9kY2JvdDpkY2JvdEB0d2RjYm90ZGItcG9zdGdyZXNxbDo1NDMyL2RjYm90P3NzbG1vZGU9ZGlzYWJsZQ==
+  token: tokenhere

skaffold.yml

@@ -0,0 +1,26 @@
+apiVersion: skaffold/v2beta27
+kind: Config
+build:
+  tagPolicy:
+    customTemplate:
+      template: latest
+  artifacts:
+    - image: dcbot
+      context: .
+      docker:
+        dockerfile: ./build/docker/dcbot/dev/Dockerfile
+deploy:
+  helm:
+    releases:
+      - name: twdcbotdb
+        repo: https://charts.bitnami.com/bitnami
+        remoteChart: postgresql
+        version: 11.6.19
+        wait: true
+        setValues:
+          auth.username: dcbot
+          auth.password: dcbot
+          auth.database: dcbot
+  kustomize:
+    paths:
+      - k8s/overlays/dev