[Ovirt-devel] [PATCH node] RSyslog configuration for standalone mode.

[Alan Pevec]

From: Bryan Kearney <bkearney at redhat.com>

It looks for a DNS service locator record by default, and lets the
user override if desired. Supports setting the maximum log file size. Includes comments from Alan Pevec and Jim Meyering.
---
 scripts/ovirt-config-logging |  141 ++++++++++++++++++++++++++++++++++++++++++
 scripts/ovirt-config-setup   |    2 +
 2 files changed, 143 insertions(+), 0 deletions(-)

diff --git a/scripts/ovirt-config-logging b/scripts/ovirt-config-logging
index c856ef1..f17bf6b 100755
--- a/scripts/ovirt-config-logging
+++ b/scripts/ovirt-config-logging
@@ -1,2 +1,143 @@
 #!/bin/bash
 #
+# Configures the rsyslog daemon.
+# Source functions library
+. /etc/init.d/functions
+. /etc/init.d/ovirt-functions
+
+
+RSYSLOG_FILE="/etc/rsyslog.conf"
+
+# Creates the rsyslog file based on the following inputs
+# $1 ipaddress of remote syslog server
+# $2 port of remote syslog server
+# $3 protocol (tcp or udp)
+function ovirt_rsyslog {
+
+if [[ "$3" = "tcp" ]]; then
+    DELIM="@@"
+else
+    DELIM="@"
+fi
+
+cat > $RSYSLOG_FILE << EOF
+#ovirt rsyslog config file
+
+#### MODULES ####
+\$ModLoad imuxsock.so    # provides support for local system logging (e.g. via logger command)
+\$ModLoad imklog.so      # provides kernel logging support (previously done by rklogd)
+
+#### GLOBAL DIRECTIVES ####
+# Use default timestamp format
+\$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat
+
+#### RULES ####
+# Log anything (except mail) of level info or higher.
+# Don't log private authentication messages!
+*.info;mail.none;authpriv.none;cron.none                /var/log/messages
+
+# The authpriv file has restricted access.
+authpriv.*                                              /var/log/secure
+
+# Log all the mail messages in one place.
+mail.*                                                  -/var/log/maillog
+
+# Log cron stuff
+cron.*                                                  /var/log/cron
+
+# Everybody gets emergency messages
+*.emerg                                                 *
+
+# Save news errors of level crit and higher in a special file.
+uucp,news.crit                                          /var/log/spooler
+
+# Save boot messages also to boot.log
+local7.*                                                /var/log/boot.log
+
+\$WorkDirectory /var/spool/rsyslog
+\$ActionQueueFileName ovirtNode
+\$ActionQueueMaxDiskSpace 10m
+\$ActionQueueSaveOnShutdown on
+\$ActionQueueType LinkedList
+\$ActionResumeRetryCount -1
+*.* $DELIM$1:$2
+EOF
+
+/sbin/service rsyslog restart
+}
+
+function prompt_user {
+    while true ; do
+        MAX_LOG_SIZE="10k"
+        printf "\nWhat is the max size for log files on this machine [10k]? "
+        read
+        if [[ "$REPLY" != "" ]]; then
+            MAX_LOG_SIZE=$REPLY
+        fi
+        printf "\nWhat is the IP address or server name for the syslog server? "
+        read
+        SYSLOG_SERVER_IP=$REPLY
+        printf "\nWhat port does the syslog daemon run on? "
+        read
+        if [[ "$REPLY" =~ '^[0-9]+$' ]]; then
+            SYSLOG_SERVER_PORT=$REPLY
+
+            PROTOCOLS="tcp udp"
+            PS3="Please select the protocol to use: "
+            select SYSLOG_SERVER_PROTOCOL in $PROTOCOLS;
+            do
+                case $SYSLOG_SERVER_PROTOCOL in
+                    "tcp")
+                        break ;;
+                    "udp")
+                        break;;
+                esac
+            done
+
+            printf "\n"
+            printf "\nLogging will be configured as follows:"
+            printf "\n======================================"
+            printf "\n Max Logfile Size: $MAX_LOG_SIZE"
+            printf "\n    Remote Server: $SYSLOG_SERVER_IP"
+            printf "\n      Remote Port: $SYSLOG_SERVER_PORT"
+            printf "\n Logging Protocol: $SYSLOG_SERVER_PROTOCOL"
+            printf "\n"
+            printf "\nPlease confirm these changes (Y/N)"
+            read
+            case $REPLY in
+                Y|y)
+                    ovirt_rsyslog $SYSLOG_SERVER_IP \
+                                  $SYSLOG_SERVER_PORT \
+                                  $SYSLOG_SERVER_PROTOCOL
+                    sed -i -e "s/^size=.*/size=$MAX_LOG_SIZE/" \
+                              /etc/logrotate.d/ovirt-logrotate.conf
+                    break
+                    ;;
+                N|n)
+                    printf "Discarding settings\n"
+                    break
+                    ;;
+            esac
+        else
+            printf "Invalid port number\n"
+        fi
+    done
+
+}
+
+# check if we were called to attempt to default
+# to remote logging
+if [[ "$1" = "default" ]] ; then
+    printf "\nAttempting to locate remote syslog server..."
+    find_srv syslog udp
+    if [[ "$SRV_PORT" != "" ]] && [[ "$SRV_SERVER" != "" ]] ; then
+         printf "found! Using server '$DEFAULT_SERVER:$DEFAULT_PORT'.\n"
+         ovirt_rsyslog $DEFAULT_SERVER $DEFAULT_PORT "udp"
+    else
+        printf "not found!\n"
+    fi
+else
+    prompt_user
+fi
+
+exit 0
diff --git a/scripts/ovirt-config-setup b/scripts/ovirt-config-setup
index 8408d14..5850aa8 100755
--- a/scripts/ovirt-config-setup
+++ b/scripts/ovirt-config-setup
@@ -2,6 +2,8 @@
 #
 # Entry point for configuring an oVirt node when running in standalone mode.
 
+#Attempt to default the syslog setting
+ovirt-config-logging "default"
 while true; do
     PS3="Please select an option: "
     # TODO should we make this optional, based on whether the password was already set?
-- 
1.5.6.5