Collect basic cpu/mem/network/io info from host for 30 secs

collect.sh

test -x pt-diskstats || {
    wget http://www.percona.com/get/pt-diskstats
    chmod +x pt-diskstats
}
reqs=""
which netstat || reqs="netstat $reqs"
which vmstat || reqs="vmstat $reqs"
which top || reqs="top $reqs"
rpm -qa > /tmp/rpms.$$
grep perl-Time-HiRes /tmp/rpms.$$ || reqs="perl-Time-HiRes $reqs"
grep perl-Digest-MD5 /tmp/rpms.$$ || reqs="perl-Digest-MD5 $reqs"
rm -f /tmp/rpms.$$

[ -n "$reqs" ] && {
    echo "missing: $reqs"
} || {

    ( ./pt-diskstats </dev/null --iterations 30 --show-inactive &> diskstats.log ) &
    ( vmstat 1 30 > vmstat.log ) &
    ( netstat -np 1 > netstat.log ) &
    netstat_pid=$!
    ( top -b -n 30 > top.log ) &
    sleep 30
    kill $netstat_pid
}