Initial commit

vendor/github.com/hyperhq/hypercli/daemon/logger/syslog/syslog.go

@@ -0,0 +1,209 @@
+// +build linux
+
+// Package syslog provides the logdriver for forwarding server logs to syslog endpoints.
+package syslog
+
+import (
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"net"
+	"net/url"
+	"os"
+	"path"
+	"strconv"
+	"strings"
+
+	syslog "github.com/RackSec/srslog"
+
+	"github.com/Sirupsen/logrus"
+	"github.com/hyperhq/hypercli/daemon/logger"
+	"github.com/hyperhq/hypercli/daemon/logger/loggerutils"
+	"github.com/hyperhq/hypercli/pkg/urlutil"
+	"github.com/docker/go-connections/tlsconfig"
+)
+
+const (
+	name        = "syslog"
+	secureProto = "tcp+tls"
+)
+
+var facilities = map[string]syslog.Priority{
+	"kern":     syslog.LOG_KERN,
+	"user":     syslog.LOG_USER,
+	"mail":     syslog.LOG_MAIL,
+	"daemon":   syslog.LOG_DAEMON,
+	"auth":     syslog.LOG_AUTH,
+	"syslog":   syslog.LOG_SYSLOG,
+	"lpr":      syslog.LOG_LPR,
+	"news":     syslog.LOG_NEWS,
+	"uucp":     syslog.LOG_UUCP,
+	"cron":     syslog.LOG_CRON,
+	"authpriv": syslog.LOG_AUTHPRIV,
+	"ftp":      syslog.LOG_FTP,
+	"local0":   syslog.LOG_LOCAL0,
+	"local1":   syslog.LOG_LOCAL1,
+	"local2":   syslog.LOG_LOCAL2,
+	"local3":   syslog.LOG_LOCAL3,
+	"local4":   syslog.LOG_LOCAL4,
+	"local5":   syslog.LOG_LOCAL5,
+	"local6":   syslog.LOG_LOCAL6,
+	"local7":   syslog.LOG_LOCAL7,
+}
+
+type syslogger struct {
+	writer *syslog.Writer
+}
+
+func init() {
+	if err := logger.RegisterLogDriver(name, New); err != nil {
+		logrus.Fatal(err)
+	}
+	if err := logger.RegisterLogOptValidator(name, ValidateLogOpt); err != nil {
+		logrus.Fatal(err)
+	}
+}
+
+// New creates a syslog logger using the configuration passed in on
+// the context. Supported context configuration variables are
+// syslog-address, syslog-facility, & 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
+	}
+
+	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
+	}
+
+	return &syslogger{
+		writer: log,
+	}, nil
+}
+
+func (s *syslogger) Log(msg *logger.Message) error {
+	if msg.Source == "stderr" {
+		return s.writer.Err(string(msg.Line))
+	}
+	return s.writer.Info(string(msg.Line))
+}
+
+func (s *syslogger) Close() error {
+	return s.writer.Close()
+}
+
+func (s *syslogger) Name() string {
+	return name
+}
+
+func parseAddress(address string) (string, string, error) {
+	if address == "" {
+		return "", "", nil
+	}
+	if !urlutil.IsTransportURL(address) {
+		return "", "", fmt.Errorf("syslog-address should be in form proto://address, got %v", address)
+	}
+	url, err := url.Parse(address)
+	if err != nil {
+		return "", "", err
+	}
+
+	// unix socket validation
+	if url.Scheme == "unix" {
+		if _, err := os.Stat(url.Path); err != nil {
+			return "", "", err
+		}
+		return url.Scheme, url.Path, nil
+	}
+
+	// here we process tcp|udp
+	host := url.Host
+	if _, _, err := net.SplitHostPort(host); err != nil {
+		if !strings.Contains(err.Error(), "missing port in address") {
+			return "", "", err
+		}
+		host = host + ":514"
+	}
+
+	return url.Scheme, host, nil
+}
+
+// ValidateLogOpt looks for syslog specific log options
+// syslog-address, syslog-facility, & syslog-tag.
+func ValidateLogOpt(cfg map[string]string) error {
+	for key := range cfg {
+		switch key {
+		case "syslog-address":
+		case "syslog-facility":
+		case "syslog-tag":
+		case "syslog-tls-ca-cert":
+		case "syslog-tls-cert":
+		case "syslog-tls-key":
+		case "syslog-tls-skip-verify":
+		case "tag":
+		default:
+			return fmt.Errorf("unknown log opt '%s' for syslog log driver", key)
+		}
+	}
+	if _, _, err := parseAddress(cfg["syslog-address"]); err != nil {
+		return err
+	}
+	if _, err := parseFacility(cfg["syslog-facility"]); err != nil {
+		return err
+	}
+	return nil
+}
+
+func parseFacility(facility string) (syslog.Priority, error) {
+	if facility == "" {
+		return syslog.LOG_DAEMON, nil
+	}
+
+	if syslogFacility, valid := facilities[facility]; valid {
+		return syslogFacility, nil
+	}
+
+	fInt, err := strconv.Atoi(facility)
+	if err == nil && 0 <= fInt && fInt <= 23 {
+		return syslog.Priority(fInt << 3), nil
+	}
+
+	return syslog.Priority(0), errors.New("invalid syslog facility")
+}
+
+func parseTLSConfig(cfg map[string]string) (*tls.Config, error) {
+	_, skipVerify := cfg["syslog-tls-skip-verify"]
+
+	opts := tlsconfig.Options{
+		CAFile:             cfg["syslog-tls-ca-cert"],
+		CertFile:           cfg["syslog-tls-cert"],
+		KeyFile:            cfg["syslog-tls-key"],
+		InsecureSkipVerify: skipVerify,
+	}
+
+	return tlsconfig.Client(opts)
+}

vendor/github.com/hyperhq/hypercli/daemon/logger/syslog/syslog_unsupported.go

@@ -0,0 +1,3 @@
+// +build !linux
+
+package syslog