forked from boyska/circolog
Compare commits
No commits in common. "9ef425d827404b1673d71afad08d1a9e429869ce" and "f66e07e8738f5371db8eb2935412accb4c3839a6" have entirely different histories.
9ef425d827
...
f66e07e873
8 changed files with 49 additions and 493 deletions
56
README.md
56
README.md
|
@ -1,9 +1,9 @@
|
|||
A syslog daemon implementing circular buffer, in-memory storage.
|
||||
|
||||
This is useful when you want to keep some (heavily detailed) log available, but you don't want to log too many
|
||||
things to disk. Remember: logging is useful, but can be dangerous to your users' privacy!
|
||||
This is useful when you want to keep some (heavy detailed) log available, but you don't want to log too many
|
||||
things to disk.
|
||||
|
||||
On your "main" syslog, forward (part of the) messages to this one!
|
||||
On your "main" syslog, send some message to this one!
|
||||
|
||||
## Integration examples
|
||||
|
||||
|
@ -27,59 +27,15 @@ and run `circologd -syslogd-socket /run/circolog-syslog.sock -query-socket /run/
|
|||
|
||||
## Client
|
||||
|
||||
`circolog` has its own client: `circolog-tail`. It is intended to resemble `tail -f` for the most basic
|
||||
options; however, it will include filtering options that are common when you want to read logs, because that's
|
||||
very easy when you have structured logs available.
|
||||
|
||||
However, one design point of circolog is to be usable without having a specific client: so the logs are
|
||||
offered on both HTTP and websocket. This means that you can use `curl` if you want:
|
||||
`curl` might be enough of a client for most uses.
|
||||
|
||||
curl --unix-socket /run/circolog-query.sock localhost/
|
||||
|
||||
will give you everything that circologd has in memory.
|
||||
will give you everything that circologd has in memory
|
||||
|
||||
If you want to "follow" (as in `tail -f`) you need to use the websocket interface. However, I don't know of
|
||||
any websocket client supporting UNIX domain socket, so you have two options:
|
||||
|
||||
1. Use `circolog-tail`
|
||||
1. wait until I write a proper `circolog-tail` client implementing it all
|
||||
2. Use `circologd` with `-query-addr 127.0.0.1:9080`, add some iptables rule to prevent non-root to access that
|
||||
port, and run `ws ws://localhost:9080/ws`. You'll get all the "backlog", and will follow new log messages.
|
||||
|
||||
### HTTP URLs and parameters
|
||||
|
||||
When using HTTP, logs are served on `/`. Valid parameters are:
|
||||
|
||||
* `l`. This is the amount of lines to send. This is essentially the same as the `-n` parameter on tail
|
||||
Using `l=-1` (the default) means "give me every log message that you have
|
||||
* `fmt`. This selects the output format. When `fmt=json` is used, each message is returned as JSON structured
|
||||
data. The format of those JSON messages is still unstable. `fmt=syslog`, the default, outputs messages using "syslog style" (RFC XXXXXX)
|
||||
|
||||
To use websocket, request path `/ws`. The same parameters of `/` are recognized.
|
||||
|
||||
## Control daemon
|
||||
|
||||
Circologd can be controlled, on some aspects, at run-time. It has 2 mechanisms for that: the easiest, and more
|
||||
limited, is sending a signal with kill; the second, and more powerful, is a control socket, where you can give
|
||||
commands to it. This control socket is just HTTP, so again `curl` is your friend. In the future a
|
||||
`circolog-ctl` client will be developed.
|
||||
|
||||
### Pause
|
||||
|
||||
When circologd is paused, every new message it receives is immediately discarded. No exception. The backlog
|
||||
is, however, preserved. This means that you can trigger the event that you want to investigate, pause
|
||||
circolog, then analyze the logs.
|
||||
Pausing might be the easiest way to make circologd only run "when needed".
|
||||
|
||||
When circologd resumes, no previous message is lost.
|
||||
|
||||
|
||||
To pause circologd with signals , send a `USR1` signal to the main pid. To "resume", send a `USR1` again.
|
||||
|
||||
To pause with HTTP, send a `POST /pause/toggle` to your circologd control socket.
|
||||
|
||||
### Clear
|
||||
|
||||
When you clear the circologd's buffer, it will discard every message it has, but will keep collecting new
|
||||
messages.
|
||||
|
||||
You can do that with `POST /logs/clear`
|
||||
|
|
|
@ -11,10 +11,7 @@ import (
|
|||
"strconv"
|
||||
"time"
|
||||
|
||||
"git.lattuga.net/boyska/circolog/formatter"
|
||||
"github.com/gorilla/websocket"
|
||||
"gopkg.in/mcuadros/go-syslog.v2/format"
|
||||
"gopkg.in/mgo.v2/bson"
|
||||
)
|
||||
|
||||
func main() {
|
||||
|
@ -31,7 +28,6 @@ func main() {
|
|||
Path: "/ws",
|
||||
}
|
||||
q := u.Query()
|
||||
q.Set("fmt", "bson")
|
||||
if *backlogLimit >= 0 {
|
||||
q.Set("l", strconv.Itoa(*backlogLimit))
|
||||
}
|
||||
|
@ -62,20 +58,12 @@ func main() {
|
|||
go func() {
|
||||
defer close(done)
|
||||
for {
|
||||
_, serialized, err := c.ReadMessage()
|
||||
_, message, err := c.ReadMessage()
|
||||
if err != nil {
|
||||
log.Println("close:", err)
|
||||
return
|
||||
}
|
||||
var parsed format.LogParts
|
||||
if err := bson.Unmarshal(serialized, &parsed); err != nil {
|
||||
log.Println("invalid YAML", err)
|
||||
continue
|
||||
}
|
||||
if err := formatter.WriteFormatted(os.Stdout, formatter.FormatSyslog, parsed); err != nil {
|
||||
log.Println("error printing", err)
|
||||
}
|
||||
fmt.Println()
|
||||
fmt.Println(string(message))
|
||||
}
|
||||
}()
|
||||
|
||||
|
|
|
@ -1,161 +0,0 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"context"
|
||||
"flag"
|
||||
"fmt"
|
||||
"io"
|
||||
"io/ioutil"
|
||||
"net"
|
||||
"net/http"
|
||||
"os"
|
||||
"strconv"
|
||||
"strings"
|
||||
)
|
||||
|
||||
var globalOpts struct {
|
||||
ctlSock string
|
||||
verbose bool
|
||||
}
|
||||
|
||||
var ctl http.Client
|
||||
|
||||
type commandFunc func([]string) error
|
||||
|
||||
var cmdMap map[string]commandFunc
|
||||
|
||||
func init() {
|
||||
cmdMap = map[string]commandFunc{
|
||||
// TODO: implement set and get of config at runtime
|
||||
//"set": setCmd,
|
||||
//"get": getCmd,
|
||||
"pause": pauseCmd,
|
||||
"reload": reloadCmd,
|
||||
"restart": restartCmd,
|
||||
"help": helpCmd,
|
||||
}
|
||||
}
|
||||
|
||||
//func setCmd(ctlSock string, args []string) error {}
|
||||
|
||||
//func getCmd(ctlSock string, args []string) error {}
|
||||
|
||||
func parsePauseOpts(postponeTime string) (string, error) {
|
||||
var waitTime int64
|
||||
var err error
|
||||
L := len(postponeTime)
|
||||
switch unit := postponeTime[L-1]; string(unit) {
|
||||
case "s":
|
||||
waitTime, err = strconv.ParseInt(postponeTime[:L-2], 10, 16)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
case "m":
|
||||
waitTime, err = strconv.ParseInt(postponeTime[:L-2], 10, 16)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
waitTime = waitTime * 60
|
||||
case "h":
|
||||
waitTime, err = strconv.ParseInt(postponeTime[:L-2], 10, 16)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
waitTime = waitTime * 60 * 60
|
||||
case "d":
|
||||
waitTime, err = strconv.ParseInt(postponeTime[:L-2], 10, 16)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
waitTime = waitTime * 60 * 60 * 24
|
||||
case "w":
|
||||
waitTime, err = strconv.ParseInt(postponeTime[:L-2], 10, 16)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
waitTime = waitTime * 60 * 60 * 24 * 7
|
||||
}
|
||||
return string(waitTime), nil
|
||||
}
|
||||
|
||||
func pauseCmd(args []string) error {
|
||||
var postBody string
|
||||
var err error
|
||||
flagset := flag.NewFlagSet(args[0], flag.ExitOnError)
|
||||
postponeTime := flagset.String("postpone", "", "How long to wait before untoggling the state")
|
||||
flagset.Parse(args[1:])
|
||||
if *postponeTime != "" {
|
||||
postBody, err = parsePauseOpts(*postponeTime)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
resp, err := ctl.Post("http://unix/pause/toggle", "application/octet-stream", strings.NewReader(postBody))
|
||||
if globalOpts.verbose {
|
||||
defer resp.Body.Close()
|
||||
bodyBytes, err2 := ioutil.ReadAll(resp.Body)
|
||||
if err2 != nil {
|
||||
return err2
|
||||
}
|
||||
fmt.Println(string(bodyBytes))
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
func reloadCmd(args []string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func restartCmd(args []string) error {
|
||||
return nil
|
||||
}
|
||||
|
||||
func helpCmd(args []string) error {
|
||||
usage(os.Stdout)
|
||||
os.Exit(0)
|
||||
return nil
|
||||
}
|
||||
|
||||
func usage(w io.Writer) {
|
||||
fmt.Fprintf(w, "USAGE: %s [globalOpts] [SUBCOMMAND] [opts]\n", os.Args[0])
|
||||
fmt.Fprintf(w, "\nSUBCOMMANDS:\n\n")
|
||||
for command := range cmdMap {
|
||||
fmt.Fprintf(w, "\t%s\n", command)
|
||||
}
|
||||
}
|
||||
|
||||
func parseAndRun(args []string) {
|
||||
cmdName := args[0]
|
||||
cmdToRun, ok := cmdMap[cmdName]
|
||||
if !ok {
|
||||
fmt.Fprintf(os.Stderr, "Unknown subcommand: %s\n", cmdName)
|
||||
usage(os.Stderr)
|
||||
os.Exit(2)
|
||||
}
|
||||
// from here: https://gist.github.com/teknoraver/5ffacb8757330715bcbcc90e6d46ac74
|
||||
ctl = http.Client{
|
||||
Transport: &http.Transport{
|
||||
DialContext: func(_ context.Context, _, _ string) (net.Conn, error) {
|
||||
return net.Dial("unix", globalOpts.ctlSock)
|
||||
},
|
||||
},
|
||||
}
|
||||
err := cmdToRun(args)
|
||||
if err != nil {
|
||||
fmt.Fprintf(os.Stderr, "Error:\n%s\n", err)
|
||||
os.Exit(1)
|
||||
}
|
||||
}
|
||||
|
||||
func main() {
|
||||
flag.StringVar(&globalOpts.ctlSock, "ctl-socket", "/tmp/circologd-ctl.sock",
|
||||
"Path to a unix domain socket for the control server; leave empty to disable")
|
||||
flag.BoolVar(&globalOpts.verbose, "verbose", false, "Print more output")
|
||||
flag.Parse()
|
||||
args := flag.Args()
|
||||
if len(args) == 0 {
|
||||
usage(os.Stderr)
|
||||
os.Exit(-1)
|
||||
}
|
||||
parseAndRun(args)
|
||||
}
|
|
@ -1,4 +1,4 @@
|
|||
package formatter
|
||||
package main
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
|
@ -8,7 +8,6 @@ import (
|
|||
"time"
|
||||
|
||||
"gopkg.in/mcuadros/go-syslog.v2/format"
|
||||
"gopkg.in/mgo.v2/bson"
|
||||
)
|
||||
|
||||
// Formatter is an interface, so that multiple implementations can exist
|
||||
|
@ -34,67 +33,32 @@ func init() {
|
|||
))
|
||||
}
|
||||
|
||||
type Format int
|
||||
type renderFormat int
|
||||
|
||||
func (rf *Format) Set(v string) error {
|
||||
newvalue, err := parseFormat(v)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
*rf = newvalue
|
||||
return nil
|
||||
}
|
||||
|
||||
func (rf Format) String() string {
|
||||
switch rf {
|
||||
case FormatJSON:
|
||||
return "json"
|
||||
case FormatSyslog:
|
||||
return "syslog"
|
||||
case FormatBSON:
|
||||
return "bson"
|
||||
}
|
||||
return ""
|
||||
}
|
||||
|
||||
func (rf Format) WriteFormatted(w io.Writer, msg format.LogParts) error {
|
||||
return WriteFormatted(w, rf, msg)
|
||||
}
|
||||
|
||||
func parseFormat(s string) (Format, error) {
|
||||
func parseRenderFormat(s string) (renderFormat, error) {
|
||||
switch s {
|
||||
case "json":
|
||||
return FormatJSON, nil
|
||||
return formatJSON, nil
|
||||
case "syslog":
|
||||
return FormatSyslog, nil
|
||||
case "bson":
|
||||
return FormatBSON, nil
|
||||
return formatSyslog, nil
|
||||
default:
|
||||
return 0, fmt.Errorf("Undefined format `%s`", s)
|
||||
}
|
||||
}
|
||||
|
||||
const (
|
||||
FormatSyslog = iota // 0
|
||||
FormatJSON = iota
|
||||
FormatBSON = iota
|
||||
formatSyslog = iota // 0
|
||||
formatJSON = iota
|
||||
)
|
||||
|
||||
func WriteFormatted(w io.Writer, f Format, msg format.LogParts) error {
|
||||
func writeFormatted(w io.Writer, f renderFormat, msg format.LogParts) error {
|
||||
switch f {
|
||||
case FormatSyslog:
|
||||
case formatSyslog:
|
||||
return syslogTmpl.Execute(w, msg)
|
||||
case FormatJSON:
|
||||
case formatJSON:
|
||||
enc := json.NewEncoder(w)
|
||||
enc.SetIndent("", " ")
|
||||
return enc.Encode(msg)
|
||||
case FormatBSON:
|
||||
enc, err := bson.Marshal(msg)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
_, err = w.Write(enc)
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
|
@ -9,16 +9,13 @@ import (
|
|||
"time"
|
||||
|
||||
"git.lattuga.net/boyska/circolog"
|
||||
"git.lattuga.net/boyska/circolog/formatter"
|
||||
"github.com/gorilla/websocket"
|
||||
"gopkg.in/mcuadros/go-syslog.v2/format"
|
||||
)
|
||||
|
||||
func setupHTTP(hub circolog.Hub) *http.ServeMux {
|
||||
mux := http.NewServeMux()
|
||||
mux.HandleFunc("/", getHTTPHandler(hub))
|
||||
mux.HandleFunc("/ws", getWSHandler(hub))
|
||||
return mux
|
||||
func setupHTTP(hub circolog.Hub) {
|
||||
http.HandleFunc("/", getHTTPHandler(hub))
|
||||
http.HandleFunc("/ws", getWSHandler(hub))
|
||||
}
|
||||
|
||||
func parseParameterL(r *http.Request) (int, error) {
|
||||
|
@ -57,7 +54,7 @@ func parseParameters(r *http.Request) (circolog.ClientOptions, error) {
|
|||
}
|
||||
|
||||
type renderOptions struct { // those are options relevant to the rendered (that is, the HTTP side of circologd)
|
||||
Format formatter.Format
|
||||
Format renderFormat
|
||||
}
|
||||
|
||||
func parseRenderParameters(r *http.Request) (renderOptions, error) {
|
||||
|
@ -71,10 +68,11 @@ func parseRenderParameters(r *http.Request) (renderOptions, error) {
|
|||
if len(val) != 1 {
|
||||
return opts, errors.New("Format repeated multiple times")
|
||||
}
|
||||
err := opts.Format.Set(val[0])
|
||||
format, err := parseRenderFormat(val[0])
|
||||
if err != nil {
|
||||
return opts, err
|
||||
}
|
||||
opts.Format = format
|
||||
}
|
||||
return opts, nil
|
||||
}
|
||||
|
@ -106,13 +104,12 @@ func getHTTPHandler(hub circolog.Hub) http.HandlerFunc {
|
|||
hub.Register <- client
|
||||
|
||||
for x := range client.Messages {
|
||||
if err := render_opts.Format.WriteFormatted(w, x); err == nil {
|
||||
if render_opts.Format != formatter.FormatJSON { // bleah
|
||||
writeFormatted(w, render_opts.Format, x)
|
||||
if render_opts.Format != formatJSON { // bleah
|
||||
w.Write([]byte("\n"))
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func getWSHandler(hub circolog.Hub) http.HandlerFunc {
|
||||
|
@ -121,18 +118,10 @@ func getWSHandler(hub circolog.Hub) http.HandlerFunc {
|
|||
WriteBufferSize: 1024,
|
||||
}
|
||||
return func(w http.ResponseWriter, r *http.Request) {
|
||||
render_opts, err := parseRenderParameters(r)
|
||||
if err != nil {
|
||||
log.Println("Error parsing:", err)
|
||||
w.WriteHeader(400)
|
||||
fmt.Fprintln(w, err)
|
||||
return
|
||||
}
|
||||
opts, err := parseParameters(r)
|
||||
if err != nil {
|
||||
log.Println("Error on request parameter \"l\":", err)
|
||||
w.WriteHeader(400)
|
||||
fmt.Fprintln(w, err)
|
||||
return
|
||||
}
|
||||
opts.Nofollow = false
|
||||
|
@ -167,7 +156,7 @@ func getWSHandler(hub circolog.Hub) http.HandlerFunc {
|
|||
if err != nil {
|
||||
return
|
||||
}
|
||||
render_opts.Format.WriteFormatted(w, message)
|
||||
writeFormatted(w, formatSyslog, message)
|
||||
|
||||
if err := w.Close(); err != nil {
|
||||
return
|
|
@ -1,82 +0,0 @@
|
|||
package main
|
||||
|
||||
import (
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"log"
|
||||
"net/http"
|
||||
"os"
|
||||
|
||||
fractal "git.lattuga.net/blallo/gotools/formatting"
|
||||
"git.lattuga.net/boyska/circolog"
|
||||
"github.com/gorilla/mux"
|
||||
)
|
||||
|
||||
func setupHTTPCtl(hub circolog.Hub, verbose bool) *mux.Router {
|
||||
m := mux.NewRouter()
|
||||
m.HandleFunc("/pause/toggle", togglePause(hub, verbose)).Methods("POST")
|
||||
m.HandleFunc("/logs/clear", clearQueue(hub, verbose)).Methods("POST")
|
||||
m.HandleFunc("/help", printHelp(verbose)).Methods("GET")
|
||||
m.HandleFunc("/echo", echo(verbose)).Methods("GET")
|
||||
return m
|
||||
}
|
||||
|
||||
func togglePause(hub circolog.Hub, verbose bool) http.HandlerFunc {
|
||||
return func(w http.ResponseWriter, r *http.Request) {
|
||||
if verbose {
|
||||
log.Printf("[%s] %s - toggled pause", r.Method, r.RemoteAddr)
|
||||
}
|
||||
hub.Commands <- circolog.HubFullCommand{Command: circolog.CommandPauseToggle}
|
||||
resp := <-hub.Responses
|
||||
active := resp.Value.(bool)
|
||||
w.Header().Set("content-type", "application/json")
|
||||
enc := json.NewEncoder(w)
|
||||
enc.Encode(map[string]interface{}{"paused": !active})
|
||||
}
|
||||
}
|
||||
|
||||
func clearQueue(hub circolog.Hub, verbose bool) http.HandlerFunc {
|
||||
return func(w http.ResponseWriter, r *http.Request) {
|
||||
if verbose {
|
||||
log.Printf("[%s] %s - cleared queue", r.Method, r.RemoteAddr)
|
||||
}
|
||||
hub.Commands <- circolog.HubFullCommand{Command: circolog.CommandClear}
|
||||
resp := <-hub.Responses
|
||||
success := resp.Value.(bool)
|
||||
w.Header().Set("content-type", "application/json")
|
||||
enc := json.NewEncoder(w)
|
||||
enc.Encode(map[string]interface{}{"success": success})
|
||||
}
|
||||
}
|
||||
|
||||
func printHelp(verbose bool) http.HandlerFunc {
|
||||
return func(w http.ResponseWriter, r *http.Request) {
|
||||
if verbose {
|
||||
log.Printf("[%s] %s - asked for help", r.Method, r.RemoteAddr)
|
||||
}
|
||||
w.Header().Set("content-type", "application/json")
|
||||
enc := json.NewEncoder(w)
|
||||
var pathsWithDocs = map[string]string{
|
||||
"/pause/toggle": "Toggle the server from pause state (not listening)",
|
||||
"/logs/clear": "Wipe the buffer from all the messages",
|
||||
"/help": "This help",
|
||||
"/echo": "Answers to heartbeat",
|
||||
}
|
||||
fractal.EncodeJSON(pathsWithDocs, enc)
|
||||
if verbose {
|
||||
errEnc := json.NewEncoder(os.Stderr)
|
||||
fractal.EncodeJSON(pathsWithDocs, errEnc)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func echo(verbose bool) http.HandlerFunc {
|
||||
return func(w http.ResponseWriter, r *http.Request) {
|
||||
log.Println("Echo")
|
||||
if verbose {
|
||||
log.Printf("[%s] %s - asked for echo", r.Method, r.RemoteAddr)
|
||||
}
|
||||
w.Header().Set("content-type", "text/plain")
|
||||
fmt.Fprintln(w, "I am on!")
|
||||
}
|
||||
}
|
|
@ -3,12 +3,10 @@ package main
|
|||
import (
|
||||
"flag"
|
||||
"fmt"
|
||||
"log"
|
||||
"net"
|
||||
"net/http"
|
||||
"os"
|
||||
"os/signal"
|
||||
"syscall"
|
||||
|
||||
"git.lattuga.net/boyska/circolog"
|
||||
syslog "gopkg.in/mcuadros/go-syslog.v2"
|
||||
|
@ -16,7 +14,7 @@ import (
|
|||
|
||||
func cleanSocket(socket string) {
|
||||
if err := os.Remove(socket); err != nil {
|
||||
fmt.Fprintln(os.Stderr, "Error cleaning", socket, ":", err)
|
||||
fmt.Fprintln(os.Stderr, socket, ":", err)
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -28,16 +26,13 @@ func main() {
|
|||
syslogAddr := flag.String("syslog-addr", "127.0.0.1:9514", "Address:port where to listen for syslog messages")
|
||||
queryAddr := flag.String("query-addr", "127.0.0.1:9080", "Address:port where to bind the query service")
|
||||
querySocket := flag.String("query-socket", "", "Path to a unix domain socket for the HTTP server; recommended for security reasons!")
|
||||
ctlSocket := flag.String("ctl-socket", "/tmp/circologd-ctl.sock", "Path to a unix domain socket for the control server; leave empty to disable")
|
||||
verbose := flag.Bool("verbose", false, "Print more output executing the daemon")
|
||||
flag.Parse()
|
||||
|
||||
interrupt := make(chan os.Signal, 1)
|
||||
signal.Notify(interrupt, syscall.SIGINT, syscall.SIGUSR1, syscall.SIGUSR2, syscall.SIGTERM)
|
||||
signal.Notify(interrupt, os.Interrupt)
|
||||
|
||||
hub := circolog.NewHub(*bufsize)
|
||||
handler := syslog.NewChannelHandler(hub.LogMessages)
|
||||
go hub.Run()
|
||||
|
||||
server := syslog.NewServer()
|
||||
server.SetFormat(syslog.RFC5424)
|
||||
|
@ -60,82 +55,31 @@ func main() {
|
|||
fmt.Fprintln(os.Stderr, "argh", err)
|
||||
os.Exit(1)
|
||||
}
|
||||
go hub.Run()
|
||||
|
||||
httpQueryServer := http.Server{Handler: setupHTTP(hub)}
|
||||
setupHTTP(hub)
|
||||
if *querySocket != "" {
|
||||
fmt.Printf("Binding address `%s` [http]\n", *querySocket)
|
||||
unixListener, err := net.Listen("unix", *querySocket)
|
||||
if err != nil {
|
||||
fmt.Fprintln(os.Stderr, "Error binding HTTP unix domain socket", err)
|
||||
return
|
||||
}
|
||||
defer cleanSocket(*querySocket)
|
||||
go func() {
|
||||
if err := httpQueryServer.Serve(unixListener); err != nil && err != http.ErrServerClosed {
|
||||
fmt.Fprintln(os.Stderr, "error binding", *querySocket, ":", err)
|
||||
}
|
||||
}()
|
||||
go http.Serve(unixListener, nil)
|
||||
} else {
|
||||
httpQueryServer.Addr = *queryAddr
|
||||
fmt.Printf("Binding address `%s` [http]\n", *queryAddr)
|
||||
go func() {
|
||||
err := httpQueryServer.ListenAndServe()
|
||||
if err != nil && err != http.ErrServerClosed {
|
||||
fmt.Fprintln(os.Stderr, "error binding", *queryAddr, ":", err)
|
||||
go http.ListenAndServe(*queryAddr, nil)
|
||||
}
|
||||
}()
|
||||
}
|
||||
|
||||
httpCtlServer := http.Server{Handler: setupHTTPCtl(hub, *verbose)}
|
||||
if *ctlSocket != "" {
|
||||
fmt.Printf("Binding address `%s` [http]\n", *ctlSocket)
|
||||
unixListener, err := net.Listen("unix", *ctlSocket)
|
||||
if err != nil {
|
||||
fmt.Fprintln(os.Stderr, "Error binding HTTP unix domain socket", err)
|
||||
return
|
||||
}
|
||||
defer cleanSocket(*ctlSocket)
|
||||
go func() {
|
||||
if err := httpCtlServer.Serve(unixListener); err != nil && err != http.ErrServerClosed {
|
||||
fmt.Fprintln(os.Stderr, "error binding:", err)
|
||||
}
|
||||
}()
|
||||
}
|
||||
|
||||
// TODO: now we are ready
|
||||
|
||||
for {
|
||||
select {
|
||||
case sig := <-interrupt:
|
||||
if sig == syscall.SIGUSR1 {
|
||||
hub.Commands <- circolog.HubFullCommand{Command: circolog.CommandPauseToggle}
|
||||
resp := <-hub.Responses
|
||||
if resp.Value.(bool) {
|
||||
log.Println("resumed")
|
||||
} else {
|
||||
log.Println("paused")
|
||||
}
|
||||
}
|
||||
if sig == syscall.SIGUSR2 {
|
||||
hub.Commands <- circolog.HubFullCommand{Command: circolog.CommandClear}
|
||||
resp := <-hub.Responses
|
||||
if resp.Value.(bool) {
|
||||
log.Println("buffer cleaned")
|
||||
} else {
|
||||
log.Println("buffer NOT cleaned")
|
||||
}
|
||||
}
|
||||
if sig == syscall.SIGTERM || sig == syscall.SIGINT {
|
||||
log.Println("Quitting because of signal", sig)
|
||||
case <-interrupt:
|
||||
server.Kill()
|
||||
if err := httpQueryServer.Shutdown(nil); err != nil {
|
||||
fmt.Fprintln(os.Stderr, "Error closing http server:", err)
|
||||
}
|
||||
if err := httpCtlServer.Shutdown(nil); err != nil {
|
||||
fmt.Fprintln(os.Stderr, "Error closing control server:", err)
|
||||
//server.Wait()
|
||||
if *syslogSocketPath != "" {
|
||||
|
||||
}
|
||||
return
|
||||
}
|
||||
default:
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
42
hub.go
42
hub.go
|
@ -24,29 +24,10 @@ type ClientOptions struct {
|
|||
// The channel "register" and "unregister" can be seen as "command"
|
||||
// keep in mind that "registering" is what you do also to get messages in a one-time fashion. In fact, Client
|
||||
// has "options", such as Nofollow, to explain the Hub what should be given
|
||||
|
||||
// An HubCommand is an "enum" of different commands
|
||||
type HubCommand int
|
||||
|
||||
const (
|
||||
CommandClear = iota
|
||||
CommandPauseToggle = iota
|
||||
)
|
||||
|
||||
// An HubFullCommand is a Command, complete with arguments
|
||||
type HubFullCommand struct {
|
||||
Command HubCommand
|
||||
}
|
||||
type CommandResponse struct {
|
||||
Value interface{}
|
||||
}
|
||||
|
||||
type Hub struct {
|
||||
Register chan Client
|
||||
Unregister chan Client
|
||||
LogMessages chan format.LogParts
|
||||
Commands chan HubFullCommand
|
||||
Responses chan CommandResponse
|
||||
|
||||
clients map[Client]bool
|
||||
circbuf *ring.Ring
|
||||
|
@ -58,8 +39,6 @@ func NewHub(ringBufSize int) Hub {
|
|||
Register: make(chan Client),
|
||||
Unregister: make(chan Client),
|
||||
LogMessages: make(chan format.LogParts),
|
||||
Commands: make(chan HubFullCommand),
|
||||
Responses: make(chan CommandResponse),
|
||||
circbuf: ring.New(ringBufSize),
|
||||
}
|
||||
}
|
||||
|
@ -98,7 +77,6 @@ func (h *Hub) register(cl Client) {
|
|||
|
||||
// Run is hub main loop; keeps everything going
|
||||
func (h *Hub) Run() {
|
||||
active := true
|
||||
for {
|
||||
select {
|
||||
case cl := <-h.Register:
|
||||
|
@ -110,7 +88,6 @@ func (h *Hub) Run() {
|
|||
delete(h.clients, cl)
|
||||
}
|
||||
case msg := <-h.LogMessages:
|
||||
if active == true {
|
||||
h.circbuf.Value = msg
|
||||
h.circbuf = h.circbuf.Next()
|
||||
for client := range h.clients {
|
||||
|
@ -122,24 +99,5 @@ func (h *Hub) Run() {
|
|||
}
|
||||
}
|
||||
}
|
||||
case cmd := <-h.Commands:
|
||||
if cmd.Command == CommandClear {
|
||||
h.clear()
|
||||
h.Responses <- CommandResponse{Value: true}
|
||||
}
|
||||
if cmd.Command == CommandPauseToggle {
|
||||
active = !active
|
||||
h.Responses <- CommandResponse{Value: active}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Clear removes all elements from the buffer
|
||||
func (h *Hub) clear() {
|
||||
buf := h.circbuf
|
||||
for i := 0; i < buf.Len(); i++ {
|
||||
buf.Value = nil
|
||||
buf = buf.Next()
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue