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Add command line interface to caplance and config file parsing
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,21 +1,7 @@ | ||
| package main | ||
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| import ( | ||
| "flag" | ||
| "os" | ||
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| "github.com/pwpon500/caplance/pkg/setups" | ||
| ) | ||
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| var ( | ||
| setupName = flag.String("setup", "", "name of test setup to create") | ||
| teardownFlag = flag.Bool("teardown", false, "run teardown instead of build setup") | ||
| ) | ||
| import "github.com/pwpon500/caplance/cmd/caplance/cmd" | ||
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| func main() { | ||
| flag.Parse() | ||
| if *setupName != "" { | ||
| setups.RunSetup(*setupName, *teardownFlag) | ||
| os.Exit(0) | ||
| } | ||
| cmd.Execute() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| package cmd | ||
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| import ( | ||
| "log" | ||
| "net" | ||
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| "github.com/pwpon500/caplance/internal/client" | ||
| "github.com/spf13/cobra" | ||
| ) | ||
|
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| func init() { | ||
| rootCmd.AddCommand(clientCmd) | ||
| } | ||
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| var clientCmd = &cobra.Command{ | ||
| Use: "client", | ||
| Short: "Start caplance in client mode", | ||
| Long: `Mark this host as a backend, allowing packets to be forwarded to it from the load balancer.`, | ||
| Run: func(cmd *cobra.Command, args []string) { | ||
| readConfig() | ||
| vip := net.ParseIP(conf.VIP) | ||
| if vip == nil { | ||
| log.Fatal("Could not parse vip: " + conf.VIP) | ||
| } | ||
| dataIP := net.ParseIP(conf.Client.DataIP) | ||
| if dataIP == nil { | ||
| log.Fatal("Could not parse data ip: " + conf.Client.DataIP) | ||
| } | ||
| c := client.NewClient(vip, dataIP) | ||
| connectIP := net.ParseIP(conf.Client.ConnectIP) | ||
| if connectIP == nil { | ||
| connectIP = net.ParseIP(conf.Server.MngIP) | ||
| if connectIP == nil { | ||
| log.Fatalf("Could not parse Client.ConnectIP (%v) or Server.MngIP (%v)\n", conf.Client.ConnectIP, conf.Server.MngIP) | ||
| } | ||
| } | ||
| err := c.Start(connectIP) | ||
| if err != nil { | ||
| log.Fatal("Failed to start with error: " + err.Error()) | ||
| } | ||
| }, | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,82 @@ | ||
| package cmd | ||
|
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| import ( | ||
| "fmt" | ||
| "log" | ||
| "os" | ||
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| "github.com/spf13/cobra" | ||
| "github.com/spf13/viper" | ||
| ) | ||
|
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| type config struct { | ||
| Client struct { | ||
| ConnectIP string | ||
| DataIP string | ||
| } | ||
| Server struct { | ||
| MngIP string | ||
| BackendCapacity int | ||
| } | ||
| VIP string | ||
| Test bool | ||
|
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| HealthRate int | ||
| RegisterTimeout int | ||
| ReadTimeout int | ||
| WriteTimeout int | ||
|
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| Sockaddr string | ||
| } | ||
|
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| var ( | ||
| conf *config | ||
| configLocation string | ||
| ) | ||
|
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| // Execute starts the cobra chain | ||
| func Execute() { | ||
| if err := rootCmd.Execute(); err != nil { | ||
| fmt.Println(err) | ||
| os.Exit(1) | ||
| } | ||
| } | ||
|
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| func init() { | ||
| viper.AddConfigPath(".") | ||
| viper.AddConfigPath("/etc/caplance/") | ||
| viper.SetConfigName("caplance.cfg") | ||
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| viper.SetDefault("Test", false) | ||
| viper.SetDefault("HealthRate", 20) | ||
| viper.SetDefault("RegisterTimeout", 10) | ||
| viper.SetDefault("ReadTimeout", 30) | ||
| viper.SetDefault("WriteTimeout", 10) | ||
| viper.SetDefault("Sockaddr", "/var/run/caplance.sock") | ||
|
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| rootCmd.PersistentFlags().StringVarP(&configLocation, "file", "f", "", "choose a non-standard config location") | ||
|
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| } | ||
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| func readConfig() { | ||
| if configLocation != "" { | ||
| viper.SetConfigFile(configLocation) | ||
| } | ||
|
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| err := viper.ReadInConfig() | ||
| if err != nil { | ||
| log.Fatal("Failed to read in config: " + err.Error()) | ||
| } | ||
|
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| conf = &config{} | ||
| err = viper.Unmarshal(conf) | ||
| if err != nil { | ||
| log.Fatal("Failed to unmarshal config into struct: " + err.Error()) | ||
| } | ||
| } | ||
|
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| var rootCmd = &cobra.Command{ | ||
| Use: "caplancectl", | ||
| Short: "caplancectl is the controller for caplance", | ||
| Long: `For more information, visit https://github.com/Pwpon500/caplance`, | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| package cmd | ||
|
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| import ( | ||
| "log" | ||
| "net" | ||
| "strconv" | ||
|
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| "github.com/pwpon500/caplance/internal/balancer" | ||
| "github.com/spf13/cobra" | ||
| ) | ||
|
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| func init() { | ||
| rootCmd.AddCommand(serverCmd) | ||
| } | ||
|
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| var serverCmd = &cobra.Command{ | ||
| Use: "server", | ||
| Short: "Start caplance in server mode", | ||
| Long: `Mark this host as the load balancer, forwarding packets to a set of backends.`, | ||
| Run: func(cmd *cobra.Command, args []string) { | ||
| readConfig() | ||
| vip := net.ParseIP(conf.VIP) | ||
| if vip == nil { | ||
| log.Fatal("Could not parse vip: " + conf.VIP) | ||
| } | ||
| mngIP := net.ParseIP(conf.Server.MngIP) | ||
| if mngIP == nil { | ||
| log.Fatal("Could not parse management ip: " + conf.Server.MngIP) | ||
| } | ||
| if conf.Server.BackendCapacity <= 0 { | ||
| log.Fatal("Backend capacity " + strconv.Itoa(conf.Server.BackendCapacity) + " must be postive.") | ||
| } | ||
| b, err := balancer.New(vip, mngIP, conf.Server.BackendCapacity) | ||
| if err != nil { | ||
| log.Fatal("Error when creating balancer: " + err.Error()) | ||
| } | ||
| b.Start() | ||
| }, | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| vip: 10.0.0.50 | ||
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| client: | ||
| dataIP: 10.0.0.2 | ||
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| server: | ||
| mngIP: 10.0.0.1 | ||
| backendCapacity: 53 |