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Merge pull request #773 from Niluge-KiWi/sshd_log_journald_cursor
other/sshd_log: use DERIVE datatype and support logs from journald too (using cursors)
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sumpfralle
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63dd4ac877
@ -1,66 +1,174 @@
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#!/bin/sh
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#
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# Plugin to monitor auth.log for sshd server events.
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#
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# Require read permitions for $LOG
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# (set in /etc/munin/plugin-conf.d/munin-node on debian)
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# On busy servers you can change value type to COUNTER and set min to 0 to avoid minus peaks at logrotate
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#
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# $Log$
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# Revision 1.2 2010/03/19 15:03:00 pmoranga
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# Revision 1.1 2009/04/26 23:28:00 ckujau
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# Revision 1.0 2009/04/22 22:00:00 zlati
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# Initial revision
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#
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# Parameters:
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: <<=cut
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=head1 NAME
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sshd_log - Munin plugin to monitor auth.log or journald for sshd
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server events.
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=head1 CONFIGURATION
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This plugin requires read permission for the logfile or journald.
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On busy servers you can change value type to COUNTER and set min to 0
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to avoid minus peaks at logrotate.
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The following environment variables are used by this plugin:
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logfile - path to the auth log file, or "journald" to use journald.
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default: /var/log/secure
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journalctlargs - space separated list of arguments to pass to
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journalctl to get the sshd logs.
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default: _COMM=sshd
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type - "GAUGE" or "DERIVE"
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default: GAUGE
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If the "logfile" environment variable is set to "journald" the sshd
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logs are read from journald, filtering on program "sshd". The filtering
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may be changed using "journalctlargs".
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Config examples for /etc/munin/plugin-conf.d/munin-node:
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[sshd_log]
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user root
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group root
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env.logfile /var/log/messages
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Config example with journald:
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[sshd_log]
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group systemd-journal
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env.logfile journald
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Config example with journald on the sshd.service unit only:
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[sshd_log]
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group systemd-journal
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env.logfile journald
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env.journalctlargs --unit=sshd.service
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Config example with journald and type DERIVE:
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[sshd_log]
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group systemd-journal
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env.logfile journald
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env.type DERIVE
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=head1 MAGIC MARKERS
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#%# family=auto
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#%# capabilities=autoconf
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=head1 AUTHOR
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Revision 2.0 2016/11/11 15:42:00 Thomas Riccardi
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Revision 1.2 2010/03/19 15:03:00 pmoranga
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Revision 1.1 2009/04/26 23:28:00 ckujau
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Revision 1.0 2009/04/22 22:00:00 zlati
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=cut
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# Script parameters:
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#
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# config (required)
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# autoconf (optional - used by munin-config)
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#
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# Magick markers (optional):
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#%# family=auto
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#%# capabilities=autoconf
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# config example for /etc/munin/plugin-conf.d/munin-node
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#[sshd_log]
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#user root
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#group root
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#env.logfile /var/log/messages
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#env.category users
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#
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LOG=${logfile:-/var/log/secure}
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JOURNALCTL_ARGS=${journalctlargs:-_COMM=sshd}
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TYPE=${type:-GAUGE}
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if [ "$LOG" = "journald" -a "$TYPE" = "DERIVE" ]; then
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TYPE=ABSOLUTE
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fi
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if [ "$1" = "autoconf" ]; then
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if [ -r "$LOG" ]; then
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echo yes
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exit 0
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if [ "$LOG" = "journald" ]; then
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# shellcheck disable=SC2086,SC2034
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if journalctl --no-pager --quiet --lines=1 $JOURNALCTL_ARGS | read -r DUMMY; then
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echo "yes"
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else
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echo no
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exit 1
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echo "no (journald empty log for '$JOURNALCTL_ARGS' not found)"
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fi
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else
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if [ -r "$LOG" ]; then
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echo "yes"
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else
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echo "no (logfile '$LOG' not readable)"
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fi
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fi
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exit 0
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fi
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if [ "$1" = "config" ]; then
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echo 'graph_title SSHD login stats from' $LOG
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echo 'graph_title SSHD login stats from' "$LOG"
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echo 'graph_args --base 1000 -l 0'
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echo 'graph_vlabel logins'
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echo 'graph_category' security
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echo 'LogPass.label Successful password logins'
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echo 'LogPass.min 0'
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echo 'LogPass.type' "$TYPE"
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echo 'LogPassPAM.label Successful login via PAM'
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echo 'LogPassPAM.min 0'
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echo 'LogPassPAM.type' "$TYPE"
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echo 'LogKey.label Successful PublicKey logins'
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echo 'LogKey.min 0'
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echo 'LogKey.type' "$TYPE"
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echo 'NoID.label No identification from user'
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echo 'NoID.min 0'
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echo 'NoID.type' "$TYPE"
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echo 'rootAttempt.label Root login attempts'
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echo 'InvUsr.label Invalid user login attepmts'
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echo 'rootAttempt.min 0'
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echo 'rootAttempt.type' "$TYPE"
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echo 'InvUsr.label Invalid user login attempts'
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echo 'InvUsr.min 0'
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echo 'InvUsr.type' "$TYPE"
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echo 'NoRDNS.label No reverse DNS for peer'
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echo 'NoRDNS.min 0'
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echo 'NoRDNS.type' "$TYPE"
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echo 'Breakin.label Potential Breakin Attempts'
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echo 'Breakin.min 0'
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echo 'Breakin.type' "$TYPE"
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exit 0
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fi
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awk 'BEGIN{c["LogPass"]=0;c["LogKey"]=0;c["NoID"]=0;c["rootAttempt"]=0;c["InvUsr"]=0;c["LogPassPAM"]=0;c["Breakin"]=0;c["NoRDNS"]=0; }
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if [ "$LOG" = "journald" -a "$TYPE" = "ABSOLUTE" ]; then
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CURSOR_FILE="$MUNIN_STATEFILE"
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# read cursor
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# format: "journald-cursor <cursor>"
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CURSOR=
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if [ -f "$CURSOR_FILE" ]; then
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CURSOR=$(awk '/^journald-cursor / {print $2}' "$CURSOR_FILE")
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fi
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else
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CURSOR_FILE=
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fi
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if [ "$LOG" = "journald" ]; then
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# shellcheck disable=SC2086
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if [ "$TYPE" = "ABSOLUTE" ]; then
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journalctl --no-pager --quiet --show-cursor ${CURSOR:+"--after-cursor=$CURSOR"} $JOURNALCTL_ARGS
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else
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journalctl --no-pager --quiet --since=$(date -dlast-sunday +%Y-%m-%d) $JOURNALCTL_ARGS
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fi
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else
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cat "$LOG"
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fi | \
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awk -v cursor_file="$CURSOR_FILE" 'BEGIN{c["LogPass"]=0;c["LogKey"]=0;c["NoID"]=0;c["rootAttempt"]=0;c["InvUsr"]=0;c["LogPassPAM"]=0;c["Breakin"]=0;c["NoRDNS"]=0; }
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/sshd\[.*Accepted password for/{c["LogPass"]++}
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/sshd\[.*Accepted publickey for/{c["LogKey"]++}
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/sshd\[.*Did not receive identification string/{c["NoID"]++}
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@ -69,4 +177,4 @@ awk 'BEGIN{c["LogPass"]=0;c["LogKey"]=0;c["NoID"]=0;c["rootAttempt"]=0;c["InvUsr
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/sshd\[.*POSSIBLE BREAK-IN ATTEMPT!/{c["Breakin"]++}
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/sshd\[.*keyboard-interactive\/pam/{c["LogPassPAM"]++}
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/sshd\[.*reverse mapping checking getaddrinfo/{c["NoRDNS"]++}a
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END{for(i in c){print i".value " c[i]} }' < $LOG
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END{if (cursor_file != "") { print "journald-cursor " $3 > cursor_file };for(i in c){print i".value " c[i]} }'
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