MogileFS rebalance workaround and MogileFS graphite reporter

graphite_report_free_space.sh

#!/bin/bash

while :; do
	mogadm check | cut -d] -f2- | awk '/writeable/{print "mogilefs."$1".free "$4" "systime()}' | nc -q0 graphite 2003
	mogadm check | cut -d] -f2- | awk '/writeable/{print "mogilefs."$1".free_percent "int($5)" "systime()}' | nc -q0 graphite 2003
	sleep `date "+60-%s%%60" | bc`
done

mogilefs_rebalancer.sh

#!/bin/bash -x

# To run: while :; do ./mogilefs_rebalancer.sh; sleep 60; done

if mogadm rebalance status | grep -q "Rebalance is running"; then
    exit 1;
fi

CURRENT_CLUSTER_USAGE=`mogadm check  | awk '/total/{print int($5)}'`

DESTINATION_DEVS=`mogadm check | grep writeable | cut -d] -f2- | awk '{ n++; a[n,1] = $1; a[n,2] = $5 } END { for (i = 1; i <= n; i++) if (a[i,2] < (precentage-5)) printf "%s\n", substr(a[i,1], 4)}' precentage=$CURRENT_CLUSTER_USAGE | head -c-1 - | tr '\n' ','`
SOURCE_DEVS=`mogadm check | grep writeable | cut -d] -f2- | awk '{ n++; a[n,1] = $1; a[n,2] = $5 } END { for (i = 1; i <= n; i++) if (a[i,2] > (precentage+5)) printf "%s\n", substr(a[i,1], 4)}' precentage=$CURRENT_CLUSTER_USAGE | head -c-1 - | tr '\n' ','`

if [[ -z $DESTINATION_DEVS || -z $SOURCE_DEVS ]]; then
    exit 1;
fi

mogadm rebalance policy --options="from_devices=$SOURCE_DEVS to_devices=$DESTINATION_DEVS limit_type=device limit_by=size limit=2g"
mogadm rebalance start