func Start(mt *Mysqld, mysqlWaitTime time.Duration) error {
var name string
// try the mysqld start hook, if any
h := hook.NewSimpleHook("mysqld_start")
hr := h.Execute()
switch hr.ExitStatus {
case hook.HOOK_SUCCESS:
// hook exists and worked, we can keep going
name = "mysqld_start hook"
case hook.HOOK_DOES_NOT_EXIST:
// hook doesn't exist, run mysqld_safe ourselves
log.Infof("No mysqld_start hook, running mysqld_safe directly")
dir, err := vtenv.VtMysqlRoot()
if err != nil {
return err
}
name = path.Join(dir, "bin/mysqld_safe")
arg := []string{
"--defaults-file=" + mt.config.path}
env := []string{os.ExpandEnv("LD_LIBRARY_PATH=$VT_MYSQL_ROOT/lib/mysql")}
cmd := exec.Command(name, arg...)
cmd.Dir = dir
cmd.Env = env
log.Infof("mysqlctl.Start mysqlWaitTime:%v %#v", mysqlWaitTime, cmd)
_, err = cmd.StderrPipe()
if err != nil {
return nil
}
err = cmd.Start()
if err != nil {
return nil
}
// wait so we don't get a bunch of defunct processes
go cmd.Wait()
default:
// hook failed, we report error
return fmt.Errorf("mysqld_start hook failed: %v", hr.String())
}
// give it some time to succeed - usually by the time the socket emerges
// we are in good shape
for i := mysqlWaitTime; i >= 0; i -= time.Second {
_, statErr := os.Stat(mt.config.SocketFile)
if statErr == nil {
// Make sure the socket file isn't stale.
conn, connErr := mt.createConnection()
if connErr == nil {
conn.Close()
return nil
}
} else if !os.IsNotExist(statErr) {
return statErr
}
time.Sleep(time.Second)
}
return errors.New(name + ": deadline exceeded waiting for " + mt.config.SocketFile)
}
// Shutdown will stop the mysqld daemon that is running in the background.
//
// waitForMysqld: should the function block until mysqld has stopped?
// This can actually take a *long* time if the buffer cache needs to be fully
// flushed - on the order of 20-30 minutes.
func (mysqld *Mysqld) Shutdown(waitForMysqld bool, mysqlWaitTime time.Duration) error {
log.Infof("mysqlctl.Shutdown")
// possibly mysql is already shutdown, check for a few files first
_, socketPathErr := os.Stat(mysqld.config.SocketFile)
_, pidPathErr := os.Stat(mysqld.config.PidFile)
if socketPathErr != nil && pidPathErr != nil {
log.Warningf("assuming shutdown - no socket, no pid file")
return nil
}
// try the mysqld shutdown hook, if any
h := hook.NewSimpleHook("mysqld_shutdown")
hr := h.Execute()
switch hr.ExitStatus {
case hook.HOOK_SUCCESS:
// hook exists and worked, we can keep going
case hook.HOOK_DOES_NOT_EXIST:
// hook doesn't exist, try mysqladmin
log.Infof("No mysqld_shutdown hook, running mysqladmin directly")
dir, err := vtenv.VtMysqlRoot()
if err != nil {
return err
}
name := path.Join(dir, "bin/mysqladmin")
arg := []string{
"-u", "vt_dba", "-S", mysqld.config.SocketFile,
"shutdown"}
env := []string{
os.ExpandEnv("LD_LIBRARY_PATH=$VT_MYSQL_ROOT/lib/mysql"),
}
_, err = execCmd(name, arg, env, dir)
if err != nil {
return err
}
default:
// hook failed, we report error
return fmt.Errorf("mysqld_shutdown hook failed: %v", hr.String())
}
// wait for mysqld to really stop. use the sock file as a proxy for that since
// we can't call wait() in a process we didn't start.
if waitForMysqld {
for i := mysqlWaitTime; i >= 0; i -= time.Second {
_, statErr := os.Stat(mysqld.config.SocketFile)
if statErr != nil && os.IsNotExist(statErr) {
return nil
}
log.Infof("Mysqld.Shutdown: sleeping for 1s waiting for socket file %v", mysqld.config.SocketFile)
time.Sleep(time.Second)
}
return errors.New("gave up waiting for mysqld to stop")
}
return nil
}
// Init will create the default directory structure for the mysqld process,
// generate / configure a my.cnf file, install a skeleton database,
// and apply the provided initial SQL file.
func (mysqld *Mysqld) Init(ctx context.Context, initDBSQLFile string) error {
log.Infof("mysqlctl.Init")
err := mysqld.createDirs()
if err != nil {
log.Errorf("%s", err.Error())
return err
}
root, err := vtenv.VtRoot()
if err != nil {
log.Errorf("%s", err.Error())
return err
}
// Set up config files.
if err = mysqld.initConfig(root); err != nil {
log.Errorf("failed creating %v: %v", mysqld.config.path, err)
return err
}
// Install data dir.
mysqlRoot, err := vtenv.VtMysqlRoot()
if err != nil {
log.Errorf("%v", err)
return err
}
log.Infof("Installing data dir with mysql_install_db")
args := []string{
"--defaults-file=" + mysqld.config.path,
"--basedir=" + mysqlRoot,
}
if _, err = execCmd(path.Join(mysqlRoot, "bin/mysql_install_db"), args, nil, mysqlRoot, nil); err != nil {
log.Errorf("mysql_install_db failed: %v", err)
return err
}
// Start mysqld.
if err = mysqld.Start(ctx); err != nil {
log.Errorf("failed starting, check %v", mysqld.config.ErrorLogPath)
return err
}
// Run initial SQL file.
sqlFile, err := os.Open(initDBSQLFile)
if err != nil {
return fmt.Errorf("can't open init_db_sql_file (%v): %v", initDBSQLFile, err)
}
defer sqlFile.Close()
if err := mysqld.executeMysqlScript("root", sqlFile); err != nil {
return fmt.Errorf("can't run init_db_sql_file (%v): %v", initDBSQLFile, err)
}
return nil
}
func (mysqld *Mysqld) installDataDir() error {
mysqlRoot, err := vtenv.VtMysqlRoot()
if err != nil {
return err
}
mysqldPath, err := binaryPath(mysqlRoot, "mysqld")
if err != nil {
return err
}
// Check mysqld version.
_, version, err := execCmd(mysqldPath, []string{"--version"}, nil, mysqlRoot, nil)
if err != nil {
return err
}
if strings.Contains(version, "Ver 5.7.") {
// MySQL 5.7 GA and up have deprecated mysql_install_db.
// Instead, initialization is built into mysqld.
log.Infof("Installing data dir with mysqld --initialize-insecure")
args := []string{
"--defaults-file=" + mysqld.config.path,
"--basedir=" + mysqlRoot,
"--initialize-insecure", // Use empty 'root'@'localhost' password.
}
if _, _, err = execCmd(mysqldPath, args, nil, mysqlRoot, nil); err != nil {
log.Errorf("mysqld --initialize-insecure failed: %v", err)
return err
}
return nil
}
log.Infof("Installing data dir with mysql_install_db")
args := []string{
"--defaults-file=" + mysqld.config.path,
"--basedir=" + mysqlRoot,
}
cmdPath, err := binaryPath(mysqlRoot, "mysql_install_db")
if err != nil {
return err
}
if _, _, err = execCmd(cmdPath, args, nil, mysqlRoot, nil); err != nil {
log.Errorf("mysql_install_db failed: %v", err)
return err
}
return nil
}
// executeMysqlScript executes a .sql script file with the mysql command line tool.
func (mysqld *Mysqld) executeMysqlScript(user string, sql io.Reader) error {
dir, err := vtenv.VtMysqlRoot()
if err != nil {
return err
}
name := path.Join(dir, "bin/mysql")
arg := []string{"--batch", "-u", user, "-S", mysqld.config.SocketFile}
env := []string{
"LD_LIBRARY_PATH=" + path.Join(dir, "lib/mysql"),
}
_, _, err = execCmd(name, arg, env, dir, sql)
if err != nil {
return err
}
return nil
}
// ExecuteMysqlCommand executes some SQL commands using a mysql command line interface process
func (mysqld *Mysqld) ExecuteMysqlCommand(sql string) error {
dir, err := vtenv.VtMysqlRoot()
if err != nil {
return err
}
name := path.Join(dir, "bin/mysql")
arg := []string{
"-u", "vt_dba", "-S", mysqld.config.SocketFile,
"-e", sql}
env := []string{
"LD_LIBRARY_PATH=" + path.Join(dir, "lib/mysql"),
}
_, err = execCmd(name, arg, env, dir)
if err != nil {
return err
}
return nil
}
// RunMysqlUpgrade will run the mysql_upgrade program on the current install.
// Will not be called when mysqld is running.
func (mysqld *Mysqld) RunMysqlUpgrade() error {
// Execute as remote action on mysqlctld if requested.
if *socketFile != "" {
log.Infof("executing Mysqld.RunMysqlUpgrade() remotely via mysqlctld server: %v", *socketFile)
client, err := mysqlctlclient.New("unix", *socketFile)
if err != nil {
return fmt.Errorf("can't dial mysqlctld: %v", err)
}
defer client.Close()
return client.RunMysqlUpgrade(context.TODO())
}
// find mysql_upgrade. If not there, we do nothing.
dir, err := vtenv.VtMysqlRoot()
if err != nil {
log.Warningf("VT_MYSQL_ROOT not set, skipping mysql_upgrade step: %v", err)
return nil
}
name := path.Join(dir, "bin/mysql_upgrade")
if _, err := os.Stat(name); err != nil {
log.Warningf("mysql_upgrade binary not present, skipping it: %v", err)
return nil
}
// run the program, if it fails, we fail
args := []string{
// --defaults-file=* must be the first arg.
"--defaults-file=" + mysqld.config.path,
"--socket", mysqld.config.SocketFile,
"--user", mysqld.dba.Uname,
"--force", // Don't complain if it's already been upgraded.
}
if mysqld.dba.Pass != "" {
// --password must be omitted entirely if empty, or else it will prompt.
args = append(args, "--password", mysqld.dba.Pass)
}
cmd := exec.Command(name, args...)
cmd.Env = []string{os.ExpandEnv("LD_LIBRARY_PATH=$VT_MYSQL_ROOT/lib/mysql")}
out, err := cmd.CombinedOutput()
log.Infof("mysql_upgrade output: %s", out)
return err
}
// openBinlog opens the binlog and returns a ReadCloser on them
func (pc *PrimeCache) openBinlog(slavestat *slaveStatus) (io.ReadCloser, error) {
dir, err := vtenv.VtMysqlRoot()
if err != nil {
return nil, err
}
cmd := exec.Command(
path.Join(dir, "bin/mysqlbinlog"),
fmt.Sprintf("--start-position=%v", slavestat.relayLogPos),
path.Join(pc.relayLogsPath, slavestat.relayLogFile),
)
stdout, err := cmd.StdoutPipe()
if err != nil {
return nil, err
}
err = cmd.Start()
if err != nil {
stdout.Close()
return nil, err
}
return stdout, nil
}
// executeMysqlScript executes a .sql script file with the mysql command line tool.
func (mysqld *Mysqld) executeMysqlScript(connParams *sqldb.ConnParams, sql io.Reader) error {
dir, err := vtenv.VtMysqlRoot()
if err != nil {
return err
}
name, err := binaryPath(dir, "mysql")
if err != nil {
return err
}
arg := []string{"--batch", "-u", connParams.Uname, "-S", mysqld.config.SocketFile}
if connParams.Pass != "" {
// -p must be omitted entirely if empty, or else it will prompt.
arg = append(arg, "-p"+connParams.Pass)
}
env := []string{
"LD_LIBRARY_PATH=" + path.Join(dir, "lib/mysql"),
}
_, _, err = execCmd(name, arg, env, dir, sql)
if err != nil {
return err
}
return nil
}
// MysqlBinlog launches mysqlbinlog and returns a ReadCloser into which its output
// will be piped. The stderr will be redirected to the log.
func (mbl *MysqlBinlog) Launch(dbname, filename string, pos int64) (stdout io.ReadCloser, err error) {
dir, err := vtenv.VtMysqlRoot()
if err != nil {
return nil, err
}
mbl.cmd = exec.Command(
path.Join(dir, "bin/mysqlbinlog"),
fmt.Sprintf("--database=%s", dbname),
fmt.Sprintf("--start-position=%d", pos),
filename,
)
stdout, err = mbl.cmd.StdoutPipe()
if err != nil {
return nil, err
}
mbl.cmd.Stderr = &logWrapper{}
err = mbl.cmd.Start()
if err != nil {
stdout.Close()
return nil, err
}
return stdout, nil
}
// findVtMysqlbinlogDir finds the directory that contains vt_mysqlbinlog:
// could be with the mysql distribution, or with the vt distribution
func findVtMysqlbinlogDir() (string, error) {
// first look in VtRoot
dir, err := vtenv.VtRoot()
if err == nil {
if _, err = os.Stat(path.Join(dir, "bin/vt_mysqlbinlog")); err == nil {
return dir, nil
}
}
// then look in VtMysqlRoot
dir, err = vtenv.VtMysqlRoot()
if err == nil {
if _, err = os.Stat(path.Join(dir, "bin/vt_mysqlbinlog")); err == nil {
return dir, nil
}
}
// then try current directory + bin/vt_mysqlbinlog
if _, err = os.Stat("bin/vt_mysqlbinlog"); err == nil {
return "", nil
}
return "", fmt.Errorf("Cannot find vt_mysqlbinlog binary")
}
// Shutdown will stop the mysqld daemon that is running in the background.
//
// waitForMysqld: should the function block until mysqld has stopped?
// This can actually take a *long* time if the buffer cache needs to be fully
// flushed - on the order of 20-30 minutes.
//
// If a mysqlctld address is provided in a flag, Shutdown will run remotely.
func (mysqld *Mysqld) Shutdown(ctx context.Context, waitForMysqld bool) error {
log.Infof("Mysqld.Shutdown")
// Execute as remote action on mysqlctld if requested.
if *socketFile != "" {
log.Infof("executing Mysqld.Shutdown() remotely via mysqlctld server: %v", *socketFile)
client, err := mysqlctlclient.New("unix", *socketFile)
if err != nil {
return fmt.Errorf("can't dial mysqlctld: %v", err)
}
defer client.Close()
return client.Shutdown(ctx, waitForMysqld)
}
// We're shutting down on purpose. We no longer want to be notified when
// mysqld terminates.
mysqld.mutex.Lock()
if mysqld.cancelWaitCmd != nil {
close(mysqld.cancelWaitCmd)
mysqld.cancelWaitCmd = nil
}
mysqld.mutex.Unlock()
// possibly mysql is already shutdown, check for a few files first
_, socketPathErr := os.Stat(mysqld.config.SocketFile)
_, pidPathErr := os.Stat(mysqld.config.PidFile)
if socketPathErr != nil && pidPathErr != nil {
log.Warningf("assuming mysqld already shut down - no socket, no pid file found")
return nil
}
// try the mysqld shutdown hook, if any
h := hook.NewSimpleHook("mysqld_shutdown")
hr := h.Execute()
switch hr.ExitStatus {
case hook.HOOK_SUCCESS:
// hook exists and worked, we can keep going
case hook.HOOK_DOES_NOT_EXIST:
// hook doesn't exist, try mysqladmin
log.Infof("No mysqld_shutdown hook, running mysqladmin directly")
dir, err := vtenv.VtMysqlRoot()
if err != nil {
return err
}
name := path.Join(dir, "bin/mysqladmin")
arg := []string{
"-u", "vt_dba", "-S", mysqld.config.SocketFile,
"shutdown"}
env := []string{
os.ExpandEnv("LD_LIBRARY_PATH=$VT_MYSQL_ROOT/lib/mysql"),
}
_, err = execCmd(name, arg, env, dir)
if err != nil {
return err
}
default:
// hook failed, we report error
return fmt.Errorf("mysqld_shutdown hook failed: %v", hr.String())
}
// Wait for mysqld to really stop. Use the sock file as a
// proxy for that since we can't call wait() in a process we
// didn't start.
if waitForMysqld {
for {
select {
case <-ctx.Done():
return errors.New("gave up waiting for mysqld to stop")
default:
}
_, statErr := os.Stat(mysqld.config.SocketFile)
if statErr != nil && os.IsNotExist(statErr) {
return nil
}
log.Infof("Mysqld.Shutdown: sleeping for 1s waiting for socket file %v", mysqld.config.SocketFile)
time.Sleep(time.Second)
}
}
return nil
}
// Start will start the mysql daemon, either by running the 'mysqld_start'
// hook, or by running mysqld_safe in the background.
// If a mysqlctld address is provided in a flag, Start will run remotely.
func (mysqld *Mysqld) Start(ctx context.Context) error {
// Execute as remote action on mysqlctld if requested.
if *socketFile != "" {
log.Infof("executing Mysqld.Start() remotely via mysqlctld server: %v", *socketFile)
client, err := mysqlctlclient.New("unix", *socketFile)
if err != nil {
return fmt.Errorf("can't dial mysqlctld: %v", err)
}
defer client.Close()
return client.Start(ctx)
}
var name string
ts := fmt.Sprintf("Mysqld.Start(%v)", time.Now().Unix())
// try the mysqld start hook, if any
switch hr := hook.NewSimpleHook("mysqld_start").Execute(); hr.ExitStatus {
case hook.HOOK_SUCCESS:
// hook exists and worked, we can keep going
name = "mysqld_start hook"
case hook.HOOK_DOES_NOT_EXIST:
// hook doesn't exist, run mysqld_safe ourselves
log.Infof("%v: No mysqld_start hook, running mysqld_safe directly", ts)
dir, err := vtenv.VtMysqlRoot()
if err != nil {
return err
}
name = path.Join(dir, "bin/mysqld_safe")
arg := []string{
"--defaults-file=" + mysqld.config.path}
env := []string{os.ExpandEnv("LD_LIBRARY_PATH=$VT_MYSQL_ROOT/lib/mysql")}
cmd := exec.Command(name, arg...)
cmd.Dir = dir
cmd.Env = env
log.Infof("%v %#v", ts, cmd)
stderr, err := cmd.StderrPipe()
if err != nil {
return nil
}
stdout, err := cmd.StdoutPipe()
if err != nil {
return nil
}
go func() {
scanner := bufio.NewScanner(stderr)
for scanner.Scan() {
log.Infof("%v stderr: %v", ts, scanner.Text())
}
}()
go func() {
scanner := bufio.NewScanner(stdout)
for scanner.Scan() {
log.Infof("%v stdout: %v", ts, scanner.Text())
}
}()
err = cmd.Start()
if err != nil {
return nil
}
mysqld.mutex.Lock()
mysqld.cancelWaitCmd = make(chan struct{})
go func(cancel <-chan struct{}) {
// Wait regardless of cancel, so we don't generate defunct processes.
err := cmd.Wait()
log.Infof("%v exit: %v", ts, err)
// The process exited. Trigger OnTerm callbacks, unless we were cancelled.
select {
case <-cancel:
default:
mysqld.mutex.Lock()
for _, callback := range mysqld.onTermFuncs {
go callback()
}
mysqld.mutex.Unlock()
}
}(mysqld.cancelWaitCmd)
mysqld.mutex.Unlock()
default:
// hook failed, we report error
return fmt.Errorf("mysqld_start hook failed: %v", hr.String())
}
// give it some time to succeed - usually by the time the socket emerges
// we are in good shape
for {
select {
case <-ctx.Done():
return errors.New(name + ": deadline exceeded waiting for " + mysqld.config.SocketFile)
default:
}
_, statErr := os.Stat(mysqld.config.SocketFile)
if statErr == nil {
// Make sure the socket file isn't stale.
conn, connErr := mysqld.dbaPool.Get(0)
if connErr == nil {
conn.Recycle()
return nil
}
} else if !os.IsNotExist(statErr) {
return statErr
}
log.Infof("%v: sleeping for 1s waiting for socket file %v", ts, mysqld.config.SocketFile)
time.Sleep(time.Second)
}
}
// Start will start the mysql daemon, either by running the 'mysqld_start'
// hook, or by running mysqld_safe in the background.
// If a mysqlctld address is provided in a flag, Start will run remotely.
func (mysqld *Mysqld) Start(ctx context.Context, mysqldArgs ...string) error {
// Execute as remote action on mysqlctld if requested.
if *socketFile != "" {
log.Infof("executing Mysqld.Start() remotely via mysqlctld server: %v", *socketFile)
client, err := mysqlctlclient.New("unix", *socketFile)
if err != nil {
return fmt.Errorf("can't dial mysqlctld: %v", err)
}
defer client.Close()
return client.Start(ctx, mysqldArgs...)
}
var name string
ts := fmt.Sprintf("Mysqld.Start(%v)", time.Now().Unix())
// try the mysqld start hook, if any
switch hr := hook.NewHook("mysqld_start", mysqldArgs).Execute(); hr.ExitStatus {
case hook.HOOK_SUCCESS:
// hook exists and worked, we can keep going
name = "mysqld_start hook"
case hook.HOOK_DOES_NOT_EXIST:
// hook doesn't exist, run mysqld_safe ourselves
log.Infof("%v: No mysqld_start hook, running mysqld_safe directly", ts)
dir, err := vtenv.VtMysqlRoot()
if err != nil {
return err
}
name, err = binaryPath(dir, "mysqld_safe")
if err != nil {
return err
}
arg := []string{
"--defaults-file=" + mysqld.config.path}
arg = append(arg, mysqldArgs...)
env := []string{os.ExpandEnv("LD_LIBRARY_PATH=$VT_MYSQL_ROOT/lib/mysql")}
cmd := exec.Command(name, arg...)
cmd.Dir = dir
cmd.Env = env
log.Infof("%v %#v", ts, cmd)
stderr, err := cmd.StderrPipe()
if err != nil {
return nil
}
stdout, err := cmd.StdoutPipe()
if err != nil {
return nil
}
go func() {
scanner := bufio.NewScanner(stderr)
for scanner.Scan() {
log.Infof("%v stderr: %v", ts, scanner.Text())
}
}()
go func() {
scanner := bufio.NewScanner(stdout)
for scanner.Scan() {
log.Infof("%v stdout: %v", ts, scanner.Text())
}
}()
err = cmd.Start()
if err != nil {
return nil
}
mysqld.mutex.Lock()
mysqld.cancelWaitCmd = make(chan struct{})
go func(cancel <-chan struct{}) {
// Wait regardless of cancel, so we don't generate defunct processes.
err := cmd.Wait()
log.Infof("%v exit: %v", ts, err)
// The process exited. Trigger OnTerm callbacks, unless we were cancelled.
select {
case <-cancel:
default:
mysqld.mutex.Lock()
for _, callback := range mysqld.onTermFuncs {
go callback()
}
mysqld.mutex.Unlock()
}
}(mysqld.cancelWaitCmd)
mysqld.mutex.Unlock()
default:
// hook failed, we report error
return fmt.Errorf("mysqld_start hook failed: %v", hr.String())
}
return mysqld.Wait(ctx)
}
// Start will start the mysql daemon, either by running the 'mysqld_start'
// hook, or by running mysqld_safe in the background.
func (mysqld *Mysqld) Start(mysqlWaitTime time.Duration) error {
var name string
ts := fmt.Sprintf("Mysqld.Start(%v)", time.Now().Unix())
// try the mysqld start hook, if any
switch hr := hook.NewSimpleHook("mysqld_start").Execute(); hr.ExitStatus {
case hook.HOOK_SUCCESS:
// hook exists and worked, we can keep going
name = "mysqld_start hook"
case hook.HOOK_DOES_NOT_EXIST:
// hook doesn't exist, run mysqld_safe ourselves
log.Infof("%v: No mysqld_start hook, running mysqld_safe directly", ts)
dir, err := vtenv.VtMysqlRoot()
if err != nil {
return err
}
name = path.Join(dir, "bin/mysqld_safe")
arg := []string{
"--defaults-file=" + mysqld.config.path}
env := []string{os.ExpandEnv("LD_LIBRARY_PATH=$VT_MYSQL_ROOT/lib/mysql")}
cmd := exec.Command(name, arg...)
cmd.Dir = dir
cmd.Env = env
log.Infof("%v mysqlWaitTime:%v %#v", ts, mysqlWaitTime, cmd)
stderr, err := cmd.StderrPipe()
if err != nil {
return nil
}
stdout, err := cmd.StdoutPipe()
if err != nil {
return nil
}
go func() {
scanner := bufio.NewScanner(stderr)
for scanner.Scan() {
log.Infof("%v stderr: %v", ts, scanner.Text())
}
}()
go func() {
scanner := bufio.NewScanner(stdout)
for scanner.Scan() {
log.Infof("%v stdout: %v", ts, scanner.Text())
}
}()
err = cmd.Start()
if err != nil {
return nil
}
mysqld.done = make(chan struct{})
go func(done chan<- struct{}) {
// wait so we don't get a bunch of defunct processes
err := cmd.Wait()
log.Infof("%v exit: %v", ts, err)
close(done)
}(mysqld.done)
default:
// hook failed, we report error
return fmt.Errorf("mysqld_start hook failed: %v", hr.String())
}
// give it some time to succeed - usually by the time the socket emerges
// we are in good shape
for i := mysqlWaitTime; i >= 0; i -= time.Second {
_, statErr := os.Stat(mysqld.config.SocketFile)
if statErr == nil {
// Make sure the socket file isn't stale.
conn, connErr := mysqld.dbaPool.Get(0)
if connErr == nil {
conn.Recycle()
return nil
}
} else if !os.IsNotExist(statErr) {
return statErr
}
log.Infof("%v: sleeping for 1s waiting for socket file %v", ts, mysqld.config.SocketFile)
time.Sleep(time.Second)
}
return errors.New(name + ": deadline exceeded waiting for " + mysqld.config.SocketFile)
}
