func checkCertExpiration() *checkers.Checker {
opts := certOpts{}
psr := flags.NewParser(&opts, flags.Default)
_, err := psr.Parse()
if err != nil {
psr.WriteHelp(os.Stdout)
os.Exit(1)
}
cfByte, err := ioutil.ReadFile(opts.CertFile)
if err != nil {
return checkers.Critical(err.Error())
}
cfBlock, _ := pem.Decode(cfByte)
cfCrt, err := x509.ParseCertificate(cfBlock.Bytes)
if err != nil {
return checkers.Critical(err.Error())
}
cfDaysRemaining := int64(cfCrt.NotAfter.Sub(time.Now().UTC()).Hours() / 24)
checkSt := checkers.OK
msg := fmt.Sprintf("%d days remaining", cfDaysRemaining)
if cfDaysRemaining < opts.Crit {
checkSt = checkers.CRITICAL
} else if cfDaysRemaining < opts.Warn {
checkSt = checkers.WARNING
}
return checkers.NewChecker(checkSt, msg)
}
func (opts *sshOpts) run() *checkers.Checker {
// prevent changing output of some commands
os.Setenv("LANG", "C")
os.Setenv("LC_ALL", "C")
config, err := opts.makeClientConfig()
if err != nil {
return checkers.Unknown(err.Error())
}
start := time.Now()
client, err := opts.dial(config)
if err != nil {
if addrerr, ok := err.(*net.AddrError); ok {
if addrerr.Timeout() {
elapsed := time.Now().Sub(start)
return opts.checkTimeoutError(elapsed, err)
} else if addrerr.Temporary() {
return checkers.Warning(err.Error())
}
}
return checkers.Critical(err.Error())
}
session, err := client.NewSession()
if err != nil {
return checkers.Critical(err.Error())
}
err = session.Close()
if err != nil {
return checkers.Unknown(err.Error())
}
elapsed := time.Now().Sub(start)
return opts.checkTimeout(elapsed)
}
func checkUptime() *checkers.Checker {
opts := connectionOpts{}
psr := flags.NewParser(&opts, flags.Default)
_, err := psr.Parse()
if err != nil {
os.Exit(1)
}
db := mysql.New("tcp", "", fmt.Sprintf("%s:%s", opts.mysqlSetting.Host, opts.mysqlSetting.Port), opts.mysqlSetting.User, opts.mysqlSetting.Pass, "")
err = db.Connect()
if err != nil {
return checkers.Critical("couldn't connect DB")
}
defer db.Close()
rows, res, err := db.Query("SHOW GLOBAL STATUS LIKE 'Uptime'")
if err != nil {
return checkers.Critical("couldn't execute query")
}
idxValue := res.Map("Value")
Uptime := rows[0].Int64(idxValue)
if opts.Crit > 0 && Uptime < opts.Crit {
return checkers.Critical(fmt.Sprintf("up %s < %s", uptime2str(Uptime), uptime2str(opts.Crit)))
} else if opts.Warn > 0 && Uptime < opts.Warn {
return checkers.Warning(fmt.Sprintf("up %s < %s", uptime2str(Uptime), uptime2str(opts.Warn)))
}
return checkers.Ok(fmt.Sprintf("up %s", uptime2str(Uptime)))
}
func run(args []string) *checkers.Checker {
_, err := flags.ParseArgs(&opts, args)
if err != nil {
return checkers.Critical(err.Error())
}
offset, err := getNtpOffset()
if err != nil {
return checkers.Unknown(err.Error())
}
var chkSt checkers.Status
var msg string
if opts.Crit < math.Abs(offset) {
msg = fmt.Sprintf("ntp offset is over %f(actual) > %f(threshold)", math.Abs(offset), opts.Crit)
chkSt = checkers.CRITICAL
} else if opts.Warn < math.Abs(offset) {
msg = fmt.Sprintf("ntp offset is over %f(actual) > %f(threshold)", math.Abs(offset), opts.Warn)
chkSt = checkers.WARNING
} else {
msg = fmt.Sprintf("ntp offset is %f(actual) < %f(warning threshold), %f(critial threshold)", offset, opts.Warn, opts.Crit)
chkSt = checkers.OK
}
return checkers.NewChecker(chkSt, msg)
}
func (opts *options) run() *checkers.Checker {
missingInstances, missingMembers, err := check(opts)
if err != nil {
return checkers.Unknown(err.Error())
}
if len(missingInstances) != 0 {
var ipAddrs []string
for _, instance := range missingInstances {
ipAddrs = append(ipAddrs, aws.StringValue(instance.PrivateIpAddress))
}
return checkers.Critical(fmt.Sprintf("%d instance(s) left from Consul cluster: %v", len(ipAddrs), ipAddrs))
}
if len(missingMembers) != 0 {
var ipAddrs []string
for _, member := range missingMembers {
ipAddrs = append(ipAddrs, fmt.Sprintf("%s(%s)", member.Node, member.Address))
}
return checkers.Warning(fmt.Sprintf("%d instance(s) not properly tagged: %v", len(ipAddrs), ipAddrs))
}
return checkers.Ok("OK")
}
func checkSlave(args []string) *checkers.Checker {
opts := redisSetting{}
psr := flags.NewParser(&opts, flags.Default)
psr.Usage = "slave [OPTIONS]"
_, err := psr.ParseArgs(args)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
c, info, err := connectRedisGetInfo(opts)
if err != nil {
return checkers.Unknown(err.Error())
}
defer c.Close()
if status, ok := (*info)["master_link_status"]; ok {
msg := fmt.Sprintf("master_link_status: %s", status)
switch status {
case "up":
return checkers.Ok(msg)
case "down":
return checkers.Critical(msg)
default:
return checkers.Unknown(msg)
}
} else {
// it may be a master!
return checkers.Unknown("couldn't get master_link_status")
}
}
func run(args []string) *checkers.Checker {
_, err := flags.ParseArgs(&opts, args)
if err != nil {
os.Exit(1)
}
stTime := time.Now()
resp, err := http.Get(opts.URL)
if err != nil {
return checkers.Critical(err.Error())
}
elapsed := time.Since(stTime)
defer resp.Body.Close()
cLength := resp.ContentLength
if cLength == -1 {
byt, _ := ioutil.ReadAll(resp.Body)
cLength = int64(len(byt))
}
checkSt := checkers.UNKNOWN
switch st := resp.StatusCode; true {
case st < 400:
checkSt = checkers.OK
case st < 500:
checkSt = checkers.WARNING
default:
checkSt = checkers.CRITICAL
}
msg := fmt.Sprintf("%s %s - %d bytes in %f second respons time",
resp.Proto, resp.Status, cLength, elapsed.Seconds())
return checkers.NewChecker(checkSt, msg)
}
func run(args []string) *checkers.Checker {
opts, err := parseArgs(args)
if err != nil {
os.Exit(1)
}
client := &http.Client{Timeout: time.Duration(opts.Timeout) * time.Second}
res, err := client.Get(createURL(opts))
if err != nil {
return checkers.Critical(err.Error())
}
defer res.Body.Close()
if res.StatusCode != http.StatusOK {
return checkers.Unknown(fmt.Sprintf("failed: http status code %d", res.StatusCode))
}
resJ := jmxJolokiaResponse{}
dec := json.NewDecoder(res.Body)
if err := dec.Decode(&resJ); err != nil {
return checkers.Critical(err.Error())
}
if resJ.Status != 200 {
return checkers.Unknown(fmt.Sprintf("failed: response status %d", resJ.Status))
}
checkSt := checkers.OK
msg := fmt.Sprintf("%s %s value %f", opts.MBean, opts.Attribute, resJ.Value)
if resJ.Value > opts.Critical {
checkSt = checkers.CRITICAL
msg = fmt.Sprintf("%s %s value is over %f > %f", opts.MBean, opts.Attribute, resJ.Value, opts.Critical)
} else if resJ.Value > opts.Warning {
checkSt = checkers.WARNING
msg = fmt.Sprintf("%s %s value is over %f > %f", opts.MBean, opts.Attribute, resJ.Value, opts.Warning)
}
return checkers.NewChecker(checkSt, msg)
}
func run(args []string) *checkers.Checker {
_, err := flags.ParseArgs(&opts, args)
if err != nil {
os.Exit(1)
}
mc := memcache.New(opts.Host + ":" + opts.Port)
mc.Timeout = time.Duration(opts.Timeout) * time.Second
err = mc.Set(&memcache.Item{Key: opts.Key, Value: []byte("Check key"), Expiration: 240})
if err != nil {
return checkers.Critical("couldn't set a key: " + err.Error())
}
item, err := mc.Get(opts.Key)
if err != nil {
return checkers.Critical("couldn't get a key: " + err.Error())
}
if string(item.Value) != "Check key" {
return checkers.Critical("not correct value")
}
return checkers.Ok("Get,Set OK")
}
func checkReplication(args []string) *checkers.Checker {
opts := replicationOpts{}
psr := flags.NewParser(&opts, flags.Default)
psr.Usage = "replication [OPTIONS]"
_, err := psr.ParseArgs(args)
if err != nil {
os.Exit(1)
}
db := newMySQL(opts.mysqlSetting)
err = db.Connect()
if err != nil {
return checkers.Unknown("couldn't connect DB")
}
defer db.Close()
rows, res, err := db.Query("SHOW SLAVE STATUS")
if err != nil {
return checkers.Unknown("couldn't execute query")
}
if len(rows) == 0 {
return checkers.Ok("MySQL is not slave")
}
idxIoThreadRunning := res.Map("Slave_IO_Running")
idxSQLThreadRunning := res.Map("Slave_SQL_Running")
idxSecondsBehindMaster := res.Map("Seconds_Behind_Master")
ioThreadStatus := rows[0].Str(idxIoThreadRunning)
sqlThreadStatus := rows[0].Str(idxSQLThreadRunning)
secondsBehindMaster := rows[0].Int64(idxSecondsBehindMaster)
if !(ioThreadStatus == "Yes" && sqlThreadStatus == "Yes") {
return checkers.Critical("MySQL replication has been stopped")
}
checkSt := checkers.OK
msg := fmt.Sprintf("MySQL replication behind master %d seconds", secondsBehindMaster)
if secondsBehindMaster > opts.Crit {
checkSt = checkers.CRITICAL
} else if secondsBehindMaster > opts.Warn {
checkSt = checkers.WARNING
}
return checkers.NewChecker(checkSt, msg)
}
func run(args []string) *checkers.Checker {
_, err := flags.ParseArgs(&opts, args)
if err != nil {
os.Exit(1)
}
client := &http.Client{}
url := fmt.Sprintf("%s://%s:%d/_cluster/health", opts.Scheme, opts.Host, opts.Port)
stTime := time.Now()
resp, err := client.Get(url)
if err != nil {
return checkers.Critical(err.Error())
}
elapsed := time.Since(stTime)
defer resp.Body.Close()
dec := json.NewDecoder(resp.Body)
var health healthStat
dec.Decode(&health)
checkSt := checkers.UNKNOWN
switch health.Status {
case "green":
checkSt = checkers.OK
case "yellow":
checkSt = checkers.WARNING
case "red":
checkSt = checkers.CRITICAL
default:
checkSt = checkers.UNKNOWN
}
msg := fmt.Sprintf("%s (cluster: %s) - %f second respons time",
health.Status, health.ClusterName, elapsed.Seconds())
return checkers.NewChecker(checkSt, msg)
}
func (opts *tcpOpts) run() *checkers.Checker {
err := opts.prepare()
if err != nil {
return checkers.Unknown(err.Error())
}
// prevent changing output of some commands
os.Setenv("LANG", "C")
os.Setenv("LC_ALL", "C")
address := fmt.Sprintf("%s:%d", opts.Hostname, opts.Port)
start := time.Now()
if opts.Delay > 0 {
time.Sleep(time.Duration(opts.Delay) * time.Second)
}
var conn net.Conn
if opts.UnixSock != "" {
conn, err = dial("unix", opts.UnixSock, opts.SSL, opts.NoCheckCertificate)
} else {
conn, err = dial("tcp", address, opts.SSL, opts.NoCheckCertificate)
}
if err != nil {
return checkers.Critical(err.Error())
}
defer conn.Close()
if opts.Send != "" {
err := write(conn, []byte(opts.Send), opts.Timeout)
if err != nil {
return checkers.Critical(err.Error())
}
}
res := ""
if opts.expectReg != nil {
buf, err := slurp(conn, opts.MaxBytes, opts.Timeout)
if err != nil {
return checkers.Critical(err.Error())
}
res = string(buf)
if !opts.expectReg.MatchString(res) {
return checkers.Critical("Unexpected response from host/socket: " + res)
}
}
if opts.Quit != "" {
err := write(conn, []byte(opts.Quit), opts.Timeout)
if err != nil {
return checkers.Critical(err.Error())
}
}
elapsed := time.Now().Sub(start)
chkSt := checkers.OK
if opts.Warning > 0 && elapsed > time.Duration(opts.Warning)*time.Second {
chkSt = checkers.WARNING
}
if opts.Critical > 0 && elapsed > time.Duration(opts.Critical)*time.Second {
chkSt = checkers.CRITICAL
}
msg := fmt.Sprintf("%.3f seconds response time on", float64(elapsed)/float64(time.Second))
if opts.Hostname != "" {
msg += " " + opts.Hostname
}
if opts.Port > 0 {
msg += fmt.Sprintf(" port %d", opts.Port)
}
if res != "" {
msg += fmt.Sprintf(" [%s]", strings.Trim(res, "\r\n"))
}
return checkers.NewChecker(chkSt, msg)
}
