simple log grepper that executes grep command on one or more hosts over ssh.

search-logs.sh

#!/bin/sh

##
# Set the variables below and then execute as follows:
#
# e.g. Search log files for foo@bar.com string.
#      $ search-logs "foo@bar.com"
#
# e.g. Search log files for foo@bar.com and display surrounding 3 lines in addition to the matched line.
#      $ search-logs "foo@bar.com" "-A 3 -B 3"
##

# Uncomment and enter host names separated with spaces.
# e.g. foo bar baz
#HOSTS=

# Uncomment and enter the login name you would use to login to the hosts via ssh.
# e.g. deployer
#SSH_LOGIN_NAME=

# Uncomment and enter the path to log files in each host.
# e.g. /var/rails/foo/production/current/log
#LOG_PATH=

GREP_PATTERN=$1
GREP_OPTIONS=$2

for host in $HOSTS ; do
  ssh $SSH_LOGIN_NAME@$host "grep $GREP_PATTERN $LOG_PATH/*.log --color=always $GREP_OPTIONS" | while read line; do echo "[$host] $line"; done
done