91 lines
2.0 KiB
Bash
Executable File
91 lines
2.0 KiB
Bash
Executable File
#!/bin/sh
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#
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# Script to do a per account synchronization of files, database and user's
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# crontab.
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# It's part of Evocluster project.
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set -e
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LOGFILE=~/log/evocluster.log
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PIDFILE=/tmp/evocluster-$USER.pid
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sync() {
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set +e
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mysqldump >~/dump.sql
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crontab -l >~/crontab
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rsync -a --delete ~/www ~/dump.sql ~/crontab $1:
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set -e
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}
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error() {
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echo -n "$(date +"%b %d %T") " >>$LOGFILE
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echo "ERROR: $1" |tee -a $LOGFILE >&2
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}
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info() {
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echo -n "$(date +"%b %d %T") " >>$LOGFILE
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echo "INFO: $1" |tee -a $LOGFILE
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}
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# Read the state file
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if [ -e ~/state ]; then
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. ~/state
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else
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error 'state file does not exist, I do not know who am I!'
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exit 2
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fi
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# Check if all required variables are set
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if [ -n "$STATE" ] && [ -n "$IP" ]; then
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LOCAL_STATE=$STATE
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REMOTE_IP=$IP
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else
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error '$STATE or $IP not set in state file!'
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exit 2
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fi
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# Check if there is not another instance of the script running
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if [ -e $PIDFILE ]; then
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error "$0 already running (PID $(cat $PIDFILE))!"
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exit 2
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fi
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echo "$$" > $PIDFILE
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trap "rm -f $PIDFILE" EXIT
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if [ $LOCAL_STATE = 'master' ]; then
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# Try to connect to the remote server and check if it is a slave
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REMOTE_STATE=$(mktemp)
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if ssh $REMOTE_IP [ -e ~/state ]; then
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ssh $REMOTE_IP cat ~/state >$REMOTE_STATE
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elif [ $? -eq 255 ]; then
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error "failed to connect to slave ($REMOTE_IP)!"
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exit 2
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else
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error "state file does not exist on slave!"
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exit 2
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fi
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. $REMOTE_STATE
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rm -f $REMOTE_STATE
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if [ -n "$STATE" ]; then
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REMOTE_STATE=$STATE
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else
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error '$STATE not set in remote state file!'
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exit 2
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fi
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if [ $REMOTE_STATE = 'slave' ]; then
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info 'local server is master and remote server is slave.'
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info "starting replication at $(/bin/date +"%Y-%m-%d %H:%M")."
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sync $REMOTE_IP
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info "replication ended at $(/bin/date +"%Y-%m-%d %H:%M")."
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else
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info 'remote server is not slave. Doing nothing.'
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fi
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else
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info 'local server is not master. Doing nothing.'
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fi
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