/
agent.go
190 lines (159 loc) · 4.61 KB
/
agent.go
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package config
import (
"fmt"
"net"
"os"
"strconv"
"strings"
"time"
"github.com/urfave/cli"
)
type AgentConfig struct {
Listen string `json:"listen"` // only for ping -> pong service
LogLevel string `json:"logLevel"`
JoinAddrs []string `json:"joinAddrs"`
DNS *DNS `json:"dns"`
Janitor *Janitor `json:"janitor"`
IPAM *IPAM `json:"ipam"`
}
type DNS struct {
Enabled bool `json:"enabled"`
Domain string `json:"domain"`
RecurseOn bool `json:"recurseOn"`
ListenAddr string `json:"listenAddr"`
TTL int `json:"ttl"`
Resolvers []string `json:"resolvers"`
ExchangeTimeout time.Duration `json:"exchangeTimeout"`
SOARname string `json:"soarname"`
SOAMname string `json:"soamname"`
SOASerial uint32 `json:"soaserial"`
SOARefresh uint32 `json:"soarefresh"`
SOARetry uint32 `json:"soaretry"`
SOAExpire uint32 `json:"soaexpire"`
}
type Janitor struct {
Enabled bool `json:"enabled"`
ListenAddr string `json:"listenAddr"`
TLSListenAddr string `json:"tlsListenAddr"`
TLSCertFile string `json:"tlsCertFile"`
TLSKeyFile string `json:"tlsKeyFile"`
Domain string `json:"domain"`
AdvertiseIP string `json:"advertiseIP"`
}
type IPAM struct {
Enabled bool `json:"enabled"`
StoreType string `json:"store_type"`
EtcdAddrs []string `json:"etcd_addrs"`
ZKAddrs []string `json:"zk_addrs"`
}
func NewAgentConfig(c *cli.Context) (*AgentConfig, error) {
cfg := &AgentConfig{
Listen: "0.0.0.0:9999",
LogLevel: "info",
JoinAddrs: []string{"0.0.0.0:9999"},
DNS: &DNS{
Enabled: true,
Domain: "swan.com",
ListenAddr: "0.0.0.0:53",
RecurseOn: true,
TTL: 0,
Resolvers: []string{"114.114.114.114"},
ExchangeTimeout: time.Second * 3,
},
Janitor: &Janitor{
Enabled: true,
ListenAddr: "0.0.0.0:80",
Domain: "swan.com",
},
IPAM: &IPAM{
Enabled: true,
StoreType: "etcd",
EtcdAddrs: []string{"127.0.0.1:2379"},
ZKAddrs: []string{},
},
}
if c.String("listen") != "" {
cfg.Listen = c.String("listen")
}
if c.String("log-level") != "" {
cfg.LogLevel = c.String("log-level")
}
if c.String("join-addrs") != "" {
cfg.JoinAddrs = strings.Split(c.String("join-addrs"), ",")
}
// both gateway & dns
if c.String("domain") != "" {
cfg.DNS.Domain = c.String("domain")
cfg.Janitor.Domain = c.String("domain")
}
// gateway
if v := c.String("gateway-enabled"); v != "" {
cfg.Janitor.Enabled, _ = strconv.ParseBool(v)
}
if c.String("gateway-advertise-ip") != "" {
cfg.Janitor.AdvertiseIP = c.String("gateway-advertise-ip")
}
if c.String("gateway-listen-addr") != "" {
cfg.Janitor.ListenAddr = c.String("gateway-listen-addr")
if cfg.Janitor.AdvertiseIP == "" {
cfg.Janitor.AdvertiseIP, _, _ = net.SplitHostPort(cfg.Janitor.ListenAddr)
}
}
if c.String("gateway-tls-listen-addr") != "" {
cfg.Janitor.TLSListenAddr = c.String("gateway-tls-listen-addr")
}
if c.String("gateway-tls-cert-file") != "" {
cfg.Janitor.TLSCertFile = c.String("gateway-tls-cert-file")
}
if c.String("gateway-tls-key-file") != "" {
cfg.Janitor.TLSKeyFile = c.String("gateway-tls-key-file")
}
// dns
if v := c.String("dns-enabled"); v != "" {
cfg.DNS.Enabled, _ = strconv.ParseBool(v)
}
if c.String("dns-listen-addr") != "" {
cfg.DNS.ListenAddr = c.String("dns-listen-addr")
}
if c.String("dns-resolvers") != "" {
cfg.DNS.Resolvers = strings.Split(c.String("dns-resolvers"), ",")
}
if ttl := c.Int("dns-ttl"); ttl > 0 {
cfg.DNS.TTL = ttl
}
// ipam
if v := c.String("ipam-enabled"); v != "" {
cfg.IPAM.Enabled, _ = strconv.ParseBool(v)
}
if typ := c.String("ipam-store-type"); typ != "" {
cfg.IPAM.StoreType = typ
}
if addrs := c.String("ipam-etcd-addrs"); addrs != "" {
cfg.IPAM.EtcdAddrs = strings.Split(addrs, ",")
}
if addrs := c.String("ipam-zk-addrs"); addrs != "" {
cfg.IPAM.ZKAddrs = strings.Split(addrs, ",")
}
if err := cfg.validate(); err != nil {
return nil, err
}
return cfg, nil
}
func (c *AgentConfig) validate() error {
// verify Janitor.AdvertiseIP is valid ip addr
if ip := c.Janitor.AdvertiseIP; ip != "" {
if net.ParseIP(ip) == nil {
return fmt.Errorf("invalid janitor advertise ip: %v", ip)
}
}
// verify Janitor.TLS cert/key files exist if gateway tls enabled
if c.Janitor.TLSListenAddr != "" {
if _, err := os.Stat(c.Janitor.TLSCertFile); err != nil {
return fmt.Errorf("tsl cert file: %v", err)
}
if _, err := os.Stat(c.Janitor.TLSKeyFile); err != nil {
return fmt.Errorf("tsl key file: %v", err)
}
}
return nil
}