Collect meminfo information for collectd

meminfo.conf

LoadPlugin exec
<Plugin exec>
        Exec deploy "/var/lib/rundeck/monitoring/meminfo.sh"
</Plugin>

meminfo.sample

See http://lwn.net/Articles/28345/ for an explanation of the values below.

MemTotal:     15736360 kB
MemFree:       2665220 kB
Buffers:        235836 kB
Cached:        2573220 kB
SwapCached:          0 kB
Active:       11961200 kB
Inactive:       589692 kB
SwapTotal:           0 kB
SwapFree:            0 kB
Dirty:           10776 kB
Writeback:           0 kB
AnonPages:     9741516 kB
Mapped:          38488 kB
Slab:           161716 kB
SReclaimable:   121780 kB
SUnreclaim:      39936 kB
PageTables:      27844 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:   7868180 kB
Committed_AS: 10674176 kB
VmallocTotal: 34359738367 kB
VmallocUsed:       180 kB
VmallocChunk: 34359738187 kB

meminfo.sh

$ cat /var/lib/rundeck/monitoring/meminfo.sh 
#!/bin/bash
 
HOSTNAME="${HOSTNAME:-`hostname -f`}"
INTERVAL="${COLLECTD_INTERVAL:-10}"
 
while sleep "$INTERVAL"
do
#Getting output. 
start_run=$(date +%s)
${start_run}:\2/p" | tee /tmp/watchoutput
cat /proc/meminfo | sed -r -n "s/(.*):[ ]*(.+) kB/\1 \2/p" | awk -v hn=$HOSTNAME -v interval=$INTERVAL '/.*/ { printf("PUTVAL %s/meminfo/memory-%s interval=%s N:%s\n", hn, $1, interval, ($2 * 1024)) }' | tee /tmp/watchoutput

done