PHP mb_send_mail EC2 mail送れない。

お急ぎのかたは、目次:1=>4.5.6.7へ
初歩的な事かもしれないですが、ハマって色々触ったのでメモ

構成 AWS利用

・　EC2インスタンスを2台立ている。
・　ELBを利用して振り分けている。

問題

片方のServerでMail送信時エラー発生している。

[000] [error] [client 00.0.0.00] exec exception:\n
sendmail: fatal: config variable inet_interfaces: host not found: localhost

問題確認

とりあえず設定ファイルを確認

1.grepでpostconf設定内容確認

 [000/root]$ postconf | grep size
berkeley_db_create_buffer_size = 16777216
berkeley_db_read_buffer_size = 131072
body_checks_size_limit = 51200
bounce_size_limit = 50000
header_size_limit = 102400
mailbox_size_limit = 51200000
message_size_limit = 10240000
tcp_windowsize = 0

[000 /root]$ postconf | grep size
berkeley_db_create_buffer_size = 16777216
berkeley_db_read_buffer_size = 131072
body_checks_size_limit = 51200
bounce_size_limit = 50000
header_size_limit = 102400
postconf: fatal: config variable inet_interfaces: host not found: localhost

設定値がおかしい！
とりあえず、

2.設定ファイルの差分とってみる。

[user@ip-00-0-0-000 ~]$ if diff <(ssh -i *****.pem root@00.0.0.00 cat /etc/postfix/main.cf) <(ssh -i *****.pem root@00.0.0.000 cat /etc/postfix/main.cf) ; then
> echo yes
> else
> echo no
> fi
yes

設定ファイル内容は同じ。
ちなみにPHP.iniも原因ではない。

[0000 /root]$ php -i | grep php.ini
Configuration File (php.ini) Path => /etc
Loaded Configuration File => /etc/php.ini

[user@ip-00-0-0-000 ~]$ if diff <(ssh -i *****.pem root@00.0.0.00 cat /etc/php.ini) <(ssh -i *****.pem root@00.0.0.000 cat /etc/php.ini) ; then
> echo no
> else
> echo yes
> fi
453c453
< error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT & ~E_NOTICE & ~E_WARNING
---
> error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT & ~E_WARNING & ~E_NOTICE
yes

3.プロセスの確認

[000 /root]$ /etc/init.d/postfix status
-b dead but pid file exists
[000 /root]$ ps aux | grep postfix
root     18691  0.0  0.0 103240   868 pts/0    S+   14:44   0:00 grep postfix

プロセスが実行されて無い？

[000 /root]$ sudo /etc/init.d/postfix stop 
Shutting down postfix:                                     [  FIELD  ]
[000 /root]$ sudo /etc/init.d/postfix start
Starting postfix:                                          [  FIELD ]

???

4. ？？？

あれ結局エラーってなんだっけ？

sendmail: fatal: config variable inet_interfaces: host not found: localhost

localhostさんは誰ですか？

[000 /root]$ ping localhost
ping: unknown host localhost

5.localhostの設定確認

[000 /root]$ vi /etc/hosts
000.0.0.0               localhost.localdomain ap1
::1             localhost6.localdomain6 localhost6

00.0.0.000      db

localhost居ないじゃん!

6.localhostの設定

[000 /root]$ vi /etc/hosts
000.0.0.0               localhost.localdomain ap1 localhost
::1             localhost6.localdomain6 localhost6

00.0.0.000      db

7.postfix再起動

[000 /root]$ sudo /etc/init.d/postfix stop
Shutting down postfix:                                     [  OK  ]
[000 /root]$ sudo /etc/init.d/postfix start
Starting postfix:                                          [  OK  ]

直ったー！

8.おまけ

mail_log確認

[000 /root]$ tail /var/log/maillog

postfix_commondの内容確認

[000 /etc/init.d]$ cat postfix
----------
RETVAL=0
prog="postfix"
lockfile=/var/lock/subsys/$prog
pidfile=/var/spool/postfix/pid/master.pid

ALIASESDB_STAMP=/var/lib/misc/postfix.aliasesdb-stamp

# Script to update chroot environment
CHROOT_UPDATE=/etc/postfix/chroot-update

status -p $pidfile -l $(basename $lockfile) -b /usr/libexec/postfix/master master >/dev/null 2>&1
running=$?

conf_check() {
    [ -x /usr/sbin/postfix ] || exit 5
    [ -d /etc/postfix ] || exit 6
    [ -d /var/spool/postfix ] || exit 5
}

make_aliasesdb() {
	if [ "$(/usr/sbin/postconf -h alias_database)" == "hash:/etc/aliases" ]
	then
		# /etc/aliases.db may be used by other MTA, make sure nothing
		# has touched it since our last newaliases call
		[ /etc/aliases -nt /etc/aliases.db ] ||
			[ "$ALIASESDB_STAMP" -nt /etc/aliases.db ] ||
			[ "$ALIASESDB_STAMP" -ot /etc/aliases.db ] || return
		/usr/bin/newaliases
		touch -r /etc/aliases.db "$ALIASESDB_STAMP"
	else
		/usr/bin/newaliases
	fi
}

start() {
	[ "$EUID" != "0" ] && exit 4
	# Check that networking is up.
	[ ${NETWORKING} = "no" ] && exit 1
	conf_check
	# Start daemons.
	echo -n $"Starting postfix: "
	make_aliasesdb >/dev/null 2>&1
	[ -x $CHROOT_UPDATE ] && $CHROOT_UPDATE
	/usr/sbin/postfix start 2>/dev/null 1>&2 && success || failure $"$prog start"
	RETVAL=$?
	[ $RETVAL -eq 0 ] && touch $lockfile
        echo
	return $RETVAL
}

stop() {
	[ "$EUID" != "0" ] && exit 4
	conf_check
        # Stop daemons.
	echo -n $"Shutting down postfix: "
	/usr/sbin/postfix stop 2>/dev/null 1>&2 && success || failure $"$prog stop"
	RETVAL=$?
	[ $RETVAL -eq 0 ] && rm -f $lockfile $pidfile
	echo
	return $RETVAL
}

reload() {
	conf_check
	echo -n $"Reloading postfix: "
	[ -x $CHROOT_UPDATE ] && $CHROOT_UPDATE
	/usr/sbin/postfix reload 2>/dev/null 1>&2 && success || failure $"$prog reload"
	RETVAL=$?
	echo
	return $RETVAL
}

abort() {
	conf_check
	/usr/sbin/postfix abort 2>/dev/null 1>&2 && success || failure $"$prog abort"
	return $?
}

flush() {
	conf_check
	/usr/sbin/postfix flush 2>/dev/null 1>&2 && success || failure $"$prog flush"
	return $?
}

check() {
	conf_check
	/usr/sbin/postfix check 2>/dev/null 1>&2 && success || failure $"$prog check"
	return $?
}

# See how we were called.
case "$1" in
  start)
	[ $running -eq 0 ] && exit 0
	start
	;;
  stop)
	[ $running -eq 0 ] || exit 0
	stop
	;;
  restart|force-reload)
	stop
	start
	;;
  reload)
	[ $running -eq 0 ] || exit 7
	reload
	;;
  abort)
	abort
	;;
  flush)
	flush
	;;
  check)
	check
	;;
  status)
	status -p $pidfile -l $(basename $lockfile) -b /usr/libexec/postfix/master master
	;;
  condrestart)
	[ $running -eq 0 ] || exit 0
	stop
	start
	;;
  *)
	echo $"Usage: $0 {start|stop|restart|reload|abort|flush|check|status|condrestart}"
	exit 2
esac

exit $?