<p>server rsyslog berjalan dengan kesalahan: kesalahan GnuTLS tak terduga -54 di nsd_gtls.c</p>

Perilaku yang diharapkan

1. rsyslog berjalan tanpa kesalahan

Perilaku sebenarnya

1. rsyslog berjalan dengan kesalahan

Langkah-langkah untuk mereproduksi perilaku

Ini adalah lingkungan kita:

pengirim log (500+ server dengan konfigurasi rsyslog) ---> penerus log (2 server) --> server target

Masalah ini terjadi di server penerusan log.

Setelah berjalan 2 hari, ada banyak koneksi terbuka di 2 server ini.
Ini memiliki lebih dari 1 koneksi dari 1 IP.
Saya telah memeriksa pengirim log tertentu, hanya 1 koneksi aktif di sana.
Jadi, masalah 1 => mengapa ada begitu banyak koneksi mati terbuka di sisi server?

Saya mencoba menyelesaikan masalah koneksi mati dengan menambahkan konfigurasi keepalive:

$InputTCPServerKeepAlive on

Koneksi berkurang sangat cepat, tetapi kesalahan yang berbeda muncul di log:

Sep 20 02:12:33 qrada-log-forwarder-lbaas-2 rsyslogd: unexpected GnuTLS error -54 in nsd_gtls.c:546: Error in the pull function.  [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:12:33 qrada-log-forwarder-lbaas-2 rsyslogd: netstream session 0x7f7ad4bc9820 from 169.61.224.213 will be closed due to error [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:12:33 qrada-log-forwarder-lbaas-2 rsyslogd: unexpected GnuTLS error -54 in nsd_gtls.c:546: Error in the pull function.  [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:12:33 qrada-log-forwarder-lbaas-2 rsyslogd: unexpected GnuTLS error -54 in nsd_gtls.c:546: Error in the pull function.  [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:12:33 qrada-log-forwarder-lbaas-2 rsyslogd: netstream session 0x7f7ad4b89910 from 52.116.56.204 will be closed due to error [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:12:33 qrada-log-forwarder-lbaas-2 rsyslogd: netstream session 0x7f7ad4b885d0 from 169.61.246.243 will be closed due to error [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:12:33 qrada-log-forwarder-lbaas-2 rsyslogd: unexpected GnuTLS error -54 in nsd_gtls.c:546: Error in the pull function.  [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:12:33 qrada-log-forwarder-lbaas-2 rsyslogd: netstream session 0x7f7ad4ba1330 from 149.81.89.147 will be closed due to error [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:12:33 qrada-log-forwarder-lbaas-2 rsyslogd: unexpected GnuTLS error -54 in nsd_gtls.c:546: Error in the pull function.  [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:14:28 qrada-log-forwarder-lbaas-2 rsyslogd:  message repeated 2 times: [unexpected GnuTLS error -54 in nsd_gtls.c:546: Error in the pull function.  [v8.32.0 try http://www.rsyslog.com/e/2078 ]]
Sep 20 02:14:28 qrada-log-forwarder-lbaas-2 rsyslogd: rsyslogd[internal_messages]: 139 messages lost due to rate-limiting
Sep 20 02:14:28 qrada-log-forwarder-lbaas-2 rsyslogd: netstream session 0x7f7ad41ca310 from 141.125.112.94 will be closed due to error [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:26:29 qrada-log-forwarder-lbaas-2 rsyslogd: unexpected GnuTLS error -54 in nsd_gtls.c:546: Error in the pull function.  [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:26:29 qrada-log-forwarder-lbaas-2 rsyslogd: netstream session 0x7f7ad5741740 from 168.1.224.168 will be closed due to error [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:32:23 qrada-log-forwarder-lbaas-2 rsyslogd: unexpected GnuTLS error -54 in nsd_gtls.c:546: Error in the pull function.  [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:32:23 qrada-log-forwarder-lbaas-2 rsyslogd: netstream session 0x7f7ad411ded0 from 130.198.104.90 will be closed due to error [v8.32.0 try http://www.rsyslog.com/e/2078 ]
Sep 20 02:39:35 qrada-log-forwarder-lbaas-2 rsyslogd: unexpected GnuTLS error -54 in nsd_gtls.c:546: Error in the pull function.  [v8.32.0 try http://www.rsyslog.com/e/2078 ]

Lingkungan

• server adalah VM di cloud

• versi rsyslog:

rsyslogd 8.32.0, compiled with:
    PLATFORM:               x86_64-pc-linux-gnu
    PLATFORM (lsb_release -d):      
    FEATURE_REGEXP:             Yes
    GSSAPI Kerberos 5 support:      Yes
    FEATURE_DEBUG (debug build, slow code): No
    32bit Atomic operations supported:  Yes
    64bit Atomic operations supported:  Yes
    memory allocator:           system default
    Runtime Instrumentation (slow code):    No
    uuid support:               Yes
    systemd support:            Yes
    Number of Bits in RainerScript integers: 64

See http://www.rsyslog.com for more information.

• platform:

Ubuntu 18.04-64

• untuk pertanyaan/masalah konfigurasi, sertakan rsyslog.conf dan file konfigurasi yang disertakan

#  /etc/rsyslog.conf    Configuration file for rsyslog.
#
#           For more information see
#           /usr/share/doc/rsyslog-doc/html/rsyslog_conf.html
#
#  Default logging rules can be found in /etc/rsyslog.d/50-default.conf


# use gtls netstream driver
$DefaultNetstreamDriver gtls

# certificate files
$DefaultNetstreamDriverCAFile /etc/rsyslog.d/keys/cacert.pem
$DefaultNetstreamDriverCertFile /etc/rsyslog.d/keys/servercert.pem
$DefaultNetstreamDriverKeyFile /etc/rsyslog.d/keys/serverkey.pem

global(debug.gnutls="10" debug.logFile="/var/log/rsyslogdebug")

#################
#### MODULES ####
#################

module(load="imuxsock") # provides support for local system logging
#module(load="immark")  # provides --MARK-- message capability

# provides UDP syslog reception
module(load="imudp")
input(type="imudp" port="514")

# provides TCP syslog reception
#module(load="imtcp")
#input(type="imtcp" port="10514")
$ModLoad imtcp
$InputTCPServerRun 10514
$InputTCPServerKeepAlive on

# provides kernel logging support and enable non-kernel klog messages
module(load="imklog" permitnonkernelfacility="on")

$InputTCPServerStreamDriverMode 1 # run driver in TLS-only mode
$InputTCPServerStreamDriverAuthMode anon # client is NOT authenticated

$InputTCPMaxSessions 10000

###########################
#### GLOBAL DIRECTIVES ####
###########################

#
# Use traditional timestamp format.
# To enable high precision timestamps, comment out the following line.
#
$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat

# Filter duplicated messages
$RepeatedMsgReduction on

#
# Set the default permissions for all log files.
#
$FileOwner syslog
$FileGroup adm
$FileCreateMode 0640
$DirCreateMode 0755
$Umask 0022
$PrivDropToUser syslog
$PrivDropToGroup syslog

#
# Where to place spool and state files
#
$WorkDirectory /var/spool/rsyslog

#
# Include all config files in /etc/rsyslog.d/
#
$IncludeConfig /etc/rsyslog.d/*.conf


authpriv.*   @@10.94.170.164:514

Catatan: dokumentasi rsyslog tersedia di sini: - rilis stabil saat ini: http://www.rsyslog.com/doc/v8-stable/ - pra-rilis: http://www.rsyslog.com/doc/master/