// New returns a new instance of the syslog logger
// example: syslog.New("udp", "localhost:514", syslog.LOG_DEBUG, "", nil)
// NOTE: tlsConfig param is optional and only applies when networks in "tcp+tls"
// see TestSyslogTLS func tion int syslog_test.go for an example usage of tlsConfig parameter
func New(network string, raddr string, tag string, tlsConfig *tls.Config) (*Syslog, error) {
var err error
s := &Syslog{
buffer: 3,
numWorkers: 3,
colors: defaultColors,
displayColor: false,
timestampFormat: log.DefaultTimeFormat,
fileDisplay: log.Lshortfile,
formatFunc: defaultFormatFunc,
}
// if non-TLS
if tlsConfig == nil {
s.writer, err = syslog.Dial(network, raddr, syslog.LOG_INFO, tag)
} else {
s.writer, err = syslog.DialWithTLSConfig(network, raddr, syslog.LOG_INFO, tag, tlsConfig)
}
if err != nil {
return nil, err
}
return s, nil
}
// New creates a syslog logger using the configuration passed in on
// the context. Supported context configuration variables are
// syslog-address, syslog-facility, syslog-format, syslog-tag.
func New(ctx logger.Context) (logger.Logger, error) {
tag, err := loggerutils.ParseLogTag(ctx, "{{.ID}}")
if err != nil {
return nil, err
}
proto, address, err := parseAddress(ctx.Config["syslog-address"])
if err != nil {
return nil, err
}
facility, err := parseFacility(ctx.Config["syslog-facility"])
if err != nil {
return nil, err
}
syslogFormatter, syslogFramer, err := parseLogFormat(ctx.Config["syslog-format"])
if err != nil {
return nil, err
}
logTag := path.Base(os.Args[0]) + "/" + tag
var log *syslog.Writer
if proto == secureProto {
tlsConfig, tlsErr := parseTLSConfig(ctx.Config)
if tlsErr != nil {
return nil, tlsErr
}
log, err = syslog.DialWithTLSConfig(proto, address, facility, logTag, tlsConfig)
} else {
log, err = syslog.Dial(proto, address, facility, logTag)
}
if err != nil {
return nil, err
}
log.SetFormatter(syslogFormatter)
log.SetFramer(syslogFramer)
return &syslogger{
writer: log,
}, nil
}
// New creates a syslog logger using the configuration passed in on
// the context. Supported context configuration variables are
// syslog-address, syslog-facility, syslog-format.
func New(info logger.Info) (logger.Logger, error) {
tag, err := loggerutils.ParseLogTag(info, loggerutils.DefaultTemplate)
if err != nil {
return nil, err
}
proto, address, err := parseAddress(info.Config["syslog-address"])
if err != nil {
return nil, err
}
facility, err := parseFacility(info.Config["syslog-facility"])
if err != nil {
return nil, err
}
syslogFormatter, syslogFramer, err := parseLogFormat(info.Config["syslog-format"], proto)
if err != nil {
return nil, err
}
var log *syslog.Writer
if proto == secureProto {
tlsConfig, tlsErr := parseTLSConfig(info.Config)
if tlsErr != nil {
return nil, tlsErr
}
log, err = syslog.DialWithTLSConfig(proto, address, facility, tag, tlsConfig)
} else {
log, err = syslog.Dial(proto, address, facility, tag)
}
if err != nil {
return nil, err
}
log.SetFormatter(syslogFormatter)
log.SetFramer(syslogFramer)
return &syslogger{
writer: log,
}, nil
}
// Initialize() expects a connection string in the following format:
// (protocol):(hostname/IP):(port)
// for example: tcp+tls:destination.server.example.com:512
func (o *SyslogOutput) Initialize(netConn string) error {
o.Lock()
defer o.Unlock()
if o.connected {
o.outputSocket.Close()
}
connSpecification := strings.SplitN(netConn, ":", 2)
o.protocol = connSpecification[0]
o.hostnamePort = connSpecification[1]
var err error
o.outputSocket, err = syslog.DialWithTLSConfig(o.protocol, o.hostnamePort, syslog.LOG_INFO, o.tag, config.TLSConfig)
if err != nil {
return errors.New(fmt.Sprintf("Error connecting to '%s': %s", netConn, err))
}
o.markConnected()
return nil
}