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--- cn:ccr:formazione:centos7:2018-11:logging-soluzioni [2018/11/28 09:16] – DESTINAZIO dmaselli@infn.it
+++ cn:ccr:formazione:centos7:2018-11:logging-soluzioni [2018/11/28 10:24] (current) – [Esercizio 3] dmaselli@infn.it
@@ Line 1: / Line 1: @@
+====== Rsyslog (Soluzioni) ======
+===== Esercizio 1 =====
+<code bash>
+cat > /etc/rsyslog.d/esercizio-1.conf <<'EOT'
+$template tpl01,"/var/log/%timestamp:::date-year%/%programname%/%timestamp:::date-year%-%timestamp:::date-month%-%timestamp:::date-day%.log"
+*.*       ?tpl01
+EOT
+systemctl restart rsyslog
+</code>
+===== Esercizio 2 =====
+<code bash>
+cat > /etc/rsyslog.d/esercizio-2.conf <<'EOT'
+:msg, contains, "importante" /var/log/all-errors
+*.err /var/log/all-errors
+EOT
+systemctl restart rsyslog
+logger -p info questo_log
+logger -p crit questo_log
+logger -p crit importante_questo_log
+tail /var/log/all-errors
+</code>
+===== Esercizio 3 =====
+Sul server:
+<code bash>
+cat > /etc/rsyslog.d/esercizio-3.conf <<'EOT'
+# Provides UDP syslog reception
+$ModLoad imudp
+$UDPServerRun 514
+# Provides TCP syslog reception
+$ModLoad imtcp
+$InputTCPServerRun 514
+$template tplremote,"/var/log/%timestamp:::date-year%/%HOSTNAME%/%programname%/%timestamp:::date-year%-%timestamp:::date-month%-%timestamp:::date-day%.log"
+*.*       ?tplremote
+EOT
+systemctl restart rsyslog
+ss -lntup | grep rsyslog
+udp    UNCONN     0      0         *:514                   *:*                   users:(("rsyslogd",pid=1139,fd=3))
+udp    UNCONN     0      0        :::514                  :::*                   users:(("rsyslogd",pid=1139,fd=4))
+tcp    LISTEN     0      25        *:514                   *:*                   users:(("rsyslogd",pid=1139,fd=5))
+tcp    LISTEN     0      25       :::514                  :::*                   users:(("rsyslogd",pid=1139,fd=6))
+</code>
+Sul client:
+<code bash>
+cat > /etc/rsyslog.d/esercizio-3.conf <<'EOT'
+*.* @@DESTINAZIONE
+EOT
+systemctl restart rsyslog
+</code>
+===== Esercizio 4 =====
+Su server e client:
+  yum install rsyslog-relp
+Su server:
+<code bash>
+cat > /etc/rsyslog.d/esercizio-4.conf <<'EOT'
+$ModLoad imrelp              # Load the input module
+$InputRELPServerRun 20514    # Set the port to 20514
+EOT
+systemctl restart rsyslog
+</code>
+Su client:
+<code bash>
+/bin/rm /etc/rsyslog.d/esercizio-3.conf
+cat > /etc/rsyslog.d/esercizio-4.conf <<'EOT'
+$ModLoad omrelp
+*.* :omrelp:DESTINAZIONE:20514;RSYSLOG_ForwardFormat
+EOT
+systemctl restart rsyslog
+logger -p info prova
+</code>
+su server:
+  systemctl stop rsyslog
+su client:
+  logger -p info prova_server_spento
+su server:
+  tail -f /var/log/remote &
+  systemctl start rsyslog
+su client
+  logger -p info prova_server_acceso
+===== Esercizio 5 =====
+<code bash>
+cat > /tmp/wall-line.sh <<'EOT'
+#!/bin/bash
+while read line; do
+  wall "$line"
+done
+EOT
+chmod +x /tmp/wall-line.sh
+cat > /etc/rsyslog.d/esercizio-5.conf <<'EOT'
+module(load="omprog")
+if ($msg contains "mondo") then {
+  action(type="omprog" binary="/tmp/wall-line.sh")
+}
+EOT
+</code>