Fix pubsub, documentation, version

.gitignore

@@ -1 +1,4 @@
 /bin
+godns
+godns.log
+etc/godns.conf

cache_redis.go

@@ -65,6 +65,6 @@ func (m *RedisCache) Remove(key string) error {
 }
 
 func (m *RedisCache) Full() bool {
-	// memcache is never full (LRU)
+	// redis is never full (LRU)
 	return false
 }

docker/Dockerfile

@@ -8,6 +8,6 @@ RUN apk --no-cache add tini
 ENTRYPOINT ["/sbin/tini", "-g", "--"]
 CMD ["godns"]
 
-COPY etc/godns.conf /etc/godns.conf
+COPY etc/godns.example.conf /etc/godns.conf
 COPY godns /usr/local/bin/godns
 RUN chmod +x /usr/local/bin/godns

docker/Dockerfile.arm

@@ -10,6 +10,6 @@ RUN apk --no-cache add tini
 ENTRYPOINT ["/sbin/tini", "-g", "--"]
 CMD ["godns"]
 
-COPY etc/godns.conf /etc/godns.conf
+COPY etc/godns.example.conf /etc/godns.conf
 COPY godns-arm /usr/local/bin/godns
 RUN chmod +x /usr/local/bin/godns

docker/Dockerfile.arm64

@@ -10,6 +10,6 @@ RUN apk --no-cache add tini
 ENTRYPOINT ["/sbin/tini", "-g", "--"]
 CMD ["godns"]
 
-COPY etc/godns.conf /etc/godns.conf
+COPY etc/godns.example.conf /etc/godns.conf
 COPY godns-arm64 /usr/local/bin/godns
 RUN chmod +x /usr/local/bin/godns

etc/godns.conf

@@ -14,17 +14,16 @@ port = 53
 [resolv]
 # Domain-specific nameservers configuration, formatting keep compatible with Dnsmasq
 # Semicolon separate multiple files.
-resolv-file = "/etc/resolv.conf"
+resolv-file = "etc/resolv.conf"
 timeout = 5  # 5 seconds
 # The concurrency interval request upstream recursive server
 # Match the PR15, https://github.com/kenshinx/godns/pull/15
 interval = 200 # 200 milliseconds
-
 setedns0 = false #Support for larger UDP DNS responses
 
 [redis]
 enable = true
-host = "127.0.0.1"
+host = "192.168.1.71"
 port = 6379
 db = 0
 password =""
@@ -35,7 +34,7 @@ servers = ["127.0.0.1:11211"]
 [log]
 stdout = true
 file = "./godns.log"
-level = "INFO"  #DEBUG | INFO |NOTICE | WARN | ERROR  
+level = "DEBUG"  #DEBUG | INFO |NOTICE | WARN | ERROR
 
 
 
@@ -50,9 +49,9 @@ maxcount = 0 #If set zero. The Sum of cache itmes will be unlimit.
 #If set false, will not query hosts file and redis hosts record
 enable = true
 host-file = "/etc/hosts"
-redis-enable = false
+redis-enable = true
 redis-key = "godns:hosts"
 ttl = 600
-refresh-interval = 5 # 5 seconds
+refresh-interval = 60 # 5 seconds
 
 

etc/godns.example.conf

@@ -0,0 +1,56 @@
+#Toml config file
+title = "GODNS"
+version = "0.2.0"
+author = "kenshin, tystuyfzand"
+
+debug = false
+
+[server]
+host = ""
+port = 53
+
+[resolv]
+# Domain-specific nameservers configuration, formatting keep compatible with Dnsmasq
+# Semicolon separate multiple files.
+resolv-file = "/etc/resolv.conf"
+timeout = 5  # 5 seconds
+# The concurrency interval request upstream recursive server
+# Match the PR15, https://github.com/kenshinx/godns/pull/15
+interval = 200 # 200 milliseconds
+# When defined, this is preferred over regular DNS. This requires a resolver to be active besides this, only for the initial lookup.
+# A hosts file entry will suffice as well.
+# dns-over-https = "https://cloudflare-dns.com/dns-query"
+setedns0 = false #Support for larger UDP DNS responses
+
+[redis]
+enable = true
+host = "127.0.0.1"
+port = 6379
+db = 0
+password =""
+
+[memcache]
+servers = ["127.0.0.1:11211"]
+
+[log]
+stdout = true
+file = "./godns.log"
+level = "INFO"  #DEBUG | INFO |NOTICE | WARN | ERROR
+
+[cache]
+# backend option [memory|memcache|redis]
+backend = "memory"  
+expire = 600  # 10 minutes
+maxcount = 0 #If set zero. The Sum of cache items will be unlimit.
+
+[hosts]
+#If set false, will not query hosts file and redis hosts record
+enable = true
+host-file = "/etc/hosts"
+redis-enable = false
+redis-key = "godns:hosts"
+ttl = 600
+# Refresh interval can be high since we have automatic updating via push and fsnotify
+refresh-interval = 300
+
+

hosts.go

@@ -32,7 +32,9 @@ func NewHosts(hs HostsSettings, rs RedisSettings) Hosts {
 
 	h := Hosts{providers, time.Second * time.Duration(hs.RefreshInterval)}
 
-	h.refresh()
+	if h.refreshInterval > 0 {
+		h.refresh()
+	}
 
 	return h
 }

hosts_redis.go

@@ -23,11 +23,14 @@ func NewRedisProvider(rc *redis.Client, key string) HostProvider {
 		hosts: make(map[string]string),
 	}
 
+	// Force an initial refresh
+	rh.Refresh()
+
 	// Use pubsub to listen for key update events
 	go func() {
 		keyspaceEvent := "__keyspace@0__:" + key
 
-		sub := make(chan string, 2)
+		sub := make(chan string, 3)
 		sub <- keyspaceEvent
 		sub <- "godns:update"
 		sub <- "godns:update_record"
@@ -38,6 +41,7 @@ func NewRedisProvider(rc *redis.Client, key string) HostProvider {
 			msg := <- messages
 
 			if msg.Channel == "godns:update" {
+				logger.Debug("Refreshing redis records due to update")
 				rh.Refresh()
 			} else if msg.Channel == "godns:update_record" {
 				recordName := string(msg.Message)
@@ -45,17 +49,23 @@ func NewRedisProvider(rc *redis.Client, key string) HostProvider {
 				b, err := rc.Hget(key, recordName)
 
 				if err != nil {
+					logger.Warn("Record %s does not exist, but was updated", recordName)
 					continue
 				}
 
-				rh.mu.RLock()
+				logger.Debug("Record %s was updated to %s", recordName, string(b))
+
+				rh.mu.Lock()
 				rh.hosts[recordName] = string(b)
-				rh.mu.RUnlock()
+				rh.mu.Unlock()
 			} else if msg.Channel == "godns:remove_record" {
-				rh.mu.RLock()
+				logger.Debug("Record %s was removed", msg.Message)
+
+				rh.mu.Lock()
 				delete(rh.hosts, string(msg.Message))
-				rh.mu.RUnlock()
+				rh.mu.Unlock()
 			} else if msg.Channel == keyspaceEvent {
+				logger.Debug("Refreshing redis records due to update")
 				rh.Refresh()
 			}
 		}

settings.go

@@ -23,8 +23,8 @@ var LogLevelMap = map[string]int{
 }
 
 type Settings struct {
-	Version      string
+	Version      string `toml:"version"`
-	Debug        bool
+	Debug        bool `toml:"debug"`
 	Server       DNSServerSettings `toml:"server"`
 	ResolvConfig ResolvSettings    `toml:"resolv"`
 	Redis        RedisSettings     `toml:"redis"`
@@ -35,9 +35,9 @@ type Settings struct {
 }
 
 type ResolvSettings struct {
-	Timeout        int
+	Timeout        int `toml:"timeout" env:"RESOLV_TIMEOUT"`
-	Interval       int
+	Interval       int `toml:"interval" env:"RESOLV_INTERVAL"`
-	SetEDNS0       bool
+	SetEDNS0       bool `toml:"setedns0" env:"RESOLV_EDNS0"`
 	ServerListFile string `toml:"server-list-file" env:"SERVER_LIST_FILE"`
 	ResolvFile     string `toml:"resolv-file" env:"RESOLV_FILE"`
 	DOHServer      string `toml:"dns-over-https" env:"DNS_HTTPS_SERVER"`
@@ -64,7 +64,7 @@ func (s RedisSettings) Addr() string {
 }
 
 type LogSettings struct {
-	Stdout bool
+	Stdout bool `toml:"stdout" env:"LOG_STDOUT"`
 	File   string `toml:"file" env:"LOG_FILE"`
 	Level  string `toml:"level" env:"LOG_LEVEL"`
 }