Initial App binary structure

.gitignore

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+alertmanager

Makefile

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+clean:
+	rm alertmanager
+
+build:
+	go build

alert-manager-config.yml

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+configOptionA: yesy

cmd/config.go

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+package cmd
+
+import (
+	"github.com/spf13/cobra"
+)
+
+// configCmd represents the config command
+// there are 2 subcommands
+// validate: used to validate a given config-gile
+// generate-template: used to generate a blank template that is filled with defaults
+var configCmd = &cobra.Command{
+	Use:   "config",
+	Short: "Use this command to validate an existing config-file or to generate a sample template",
+}
+
+func init() {
+	rootCmd.AddCommand(configCmd)
+}

cmd/generateTemplate.go

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+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+// generateTemplateCmd represents the generateTemplate command
+var generateTemplateCmd = &cobra.Command{
+	Use:   "generate-template",
+	Short: "generate a sample config template",
+
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println("generateTemplate called")
+	},
+}
+
+func init() {
+	configCmd.AddCommand(generateTemplateCmd)
+
+	// generateTemplateCmd.Flags().String("output-file", "t", false, "Help message for toggle")
+}

cmd/root.go

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+package cmd
+
+import (
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+var version = "0.0.1"
+var DEFAULT_LOG_LEVEL = "INFO"
+
+var rootCmd = &cobra.Command{
+	Use:     "alertmanager",
+	Version: version,
+	Short:   "An alertmanager for managing alerts",
+	Long: `This alertmanager tool can be used to start the alertmanager server or to validate the config.
+Additionally you can also generate a bare config-template`,
+}
+
+func Execute() {
+	err := rootCmd.Execute()
+	if err != nil {
+		os.Exit(1)
+	}
+}
+
+func init() {
+	rootCmd.PersistentFlags().String("log-level", DEFAULT_LOG_LEVEL, "log-level for alertmanager; options INFO|DEBUG|ERROR")
+}

cmd/server.go

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+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var serverCmd = &cobra.Command{
+	Use:   "server",
+	Short: "Start the AlertManager Webhook Server",
+	RunE:  serverCommandRunE,
+}
+
+func serverCommandRunE(cmd *cobra.Command, args []string) error {
+	fmt.Println("Server is being called")
+	ll, _ := cmd.Flags().GetString("log-level")
+	fmt.Println(ll)
+	return nil
+}
+
+func init() {
+	rootCmd.AddCommand(serverCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// serverCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// serverCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}

cmd/validate.go

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+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+// validateCmd represents the validate command
+var validateCmd = &cobra.Command{
+	Use:   "validate",
+	Short: "validate a config-file for errors",
+	Run:   validateCmdRun,
+}
+
+func init() {
+	configCmd.AddCommand(validateCmd)
+
+	validateCmd.Flags().String("config-file", "./alert-manager-config.yml", "Path to config for validation")
+}
+
+func validateCmdRun(cmd *cobra.Command, args []string) {
+	// config.Validate()
+	fmt.Println("validate called")
+}

config/config.go

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+package config
+
+import "fmt"
+
+type AlertManagerConfig struct {
+	AlertPipelines []AlertPipelineConfig
+}
+
+type AlertPipelineConfig struct{}
+
+func (c AlertManagerConfig) String() string {
+	return
+}
+
+func (c AlertManagerConfig) Validate() {
+	fmt.Println("Validate Config")
+}

go.mod

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+module alertmanager
+
+go 1.21.0
+
+require (
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/spf13/cobra v1.8.1 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+)

go.sum

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+github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
+github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/spf13/cobra v1.8.1 h1:e5/vxKd/rZsfSJMUX1agtjeTDf+qv1/JdBF8gg5k9ZM=
+github.com/spf13/cobra v1.8.1/go.mod h1:wHxEcudfqmLYa8iTfL+OuZPbBZkmvliBWKIezN3kD9Y=
+github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
+github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

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+package main
+
+import "alertmanager/cmd"
+
+func main() {
+	cmd.Execute()
+}

scratchpad.md

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+- Use https://github.com/alecthomas/kong for config management (or use [flag](https://pkg.go.dev/flag) from the STL)
+  - CLI params
+    - --server-port
+    - --pprof-port
+    - --alerting-config
+    - --auth-config
+- Use [net/http]
+  - needs 2 min endpoints
+    - POST / (for getting webhook)
+    - POST /~/reload to reload config
+    - GET /~/config to get current loaded config
+    - GET /health
+- Use logrus for logging
+- Tests
+
+# Tol
+
+## app cli style
+
+alertmanager server --port abcd --pprof-port efgh --config /path-to-file --loglevel
+
+alertmanager config generate-template --out-file
+alertmanager config validate --config-file
+
+## Flow
+
+Alert -> Enrichment(s) -> Action(s)