Munin contributed plugins

#!/bin/bash

: <<=cut

=head1 NAME 

 emc_vnx_block_lun_perfdata - Plugin to monitor Block statistics of EMC VNX 5300 Unified Storage Processors

=head1 AUTHOR

 Evgeny Beysembaev <megabotva@gmail.com>

=head1 LICENSE

 GPLv2

=head1 MAGIC MARKERS

  #%# family=auto

  #%# capabilities=autoconf

=head1 DESCRIPTION

 The plugin monitors LUN of EMC Unified Storage FLARE SP's. Probably it can also be compatible with 

 other Clariion systems. It uses SSH to connect to Control Stations, then remotely executes 

 /nas/sbin/navicli and fetches and parses data from it. Obviously, it's easy to reconfigure plugin not to use 

 Control Stations' navicli in favor of using locally installed /opt/Navisphere's cli. There is no difference which

 Storage Processor to use to gather data, so this plugin tries both of them and uses the first active one.

 This plugin also automatically chooses Primary Control Station from the list by calling /nasmcd/sbin/getreason and 

 /nasmcd/sbin/t2slot.

 I left some parts of this plugin as rudimental to make easy to reconfigure it to draw more (or less) data.

=head1 COMPATIBILITY

 The plugin has been written for being compatible with EMC VNX5300 Storage system, as this is the only EMC storage which 

 i have. By the way, i am pretty sure it can also work with other VNX1 storages, like VNX5100 and VNX5500, and old-style 

 Clariion systems.

 About VNX2 series, i don't know whether the plugin will be able to work with them. Maybe it would need some corrections

 in command-line backend. The same situation is with other EMC systems, so i encourage you to try and fix the plugin. 

=head1 CONFIGURATION

=head2 Prerequisites

 First of all, be sure that statistics collection is turned on. You can do this by typing:

 navicli -h spa setstats -on

 on your Control Station or locally through /opt/Navisphere 

 Also, the plugin actively uses buggy "cdef" feature of Munin, and here we can be hit by the following bugs:

 http://munin-monitoring.org/ticket/1017 - Here I have some workarounds in plugin, be sure that they are working.

 http://munin-monitoring.org/ticket/1352 - 

 Metrics in my plugin can be much longer than 15 characters, so you have to edit the following file:

 /usr/share/perl5/Munin/Master/GraphOld.pm

 Find get_field_name() function and change "15" to "255".

=head2 Installation

 The plugin uses SSH to connect to Control Stations. It's possible to use 'nasadmin' user, but it would be better

 if you create read-only global user by Unisphere Client. The user should have only Operator role.

 I created "operator" user but due to the fact that Control Stations already had one internal "operator" user,

 the new one was called "operator1". So be careful.

 On munin-node side choose a user which will be used to connect through SSH. Generally user "munin" is ok. Then,

 execute "sudo su munin -s /bin/bash", "ssh-keygen" and "ssh-copy-id" to both Control Stations with newly created 

 user.

 Make a link from /usr/share/munin/plugins/emc_vnx_dm_basic_stats to /etc/munin/plugins/emc_vnx_dm_basic_stats_<NAME>,

 where <NAME> is any arbitrary name of your storage system. The plugin will return <NAME> in its answer 

 as "host_name" field.

 Assume your storage system is called "VNX5300".

 Make a configuration file at /etc/munin/plugin-conf.d/emc_vnx_block_lun_perfdata_VNX5300

 [emc_vnx_block_lun_perfdata_VNX5300]

 user munin							# SSH Client local user

 env.username operator1						# Remote user with Operator role

 env.cs_addr 192.168.1.1 192.168.1.2				# Control Stations addresses

=head1 ERRATA

 It counts Queue Length in not fully correct way. We take parameters totally from both SP's, but after we divide them

 independently by load of SPA and SPB. Anyway, in most AAA / ALUA cases the formula is correct.

=head1 HISTORY

 09.11.2016 - First Release

 26.12.2016 - Compatibility with Munin coding style

=cut

export LANG=C

TARGET=$(echo "${0##*/}" | cut -d _ -f 6)

SPALL="SPA SPB"

NAVICLI="/nas/sbin/navicli"

ssh_check() {

        ssh -q $username@$1 "/nasmcd/sbin/getreason | grep -w slot_\`/nasmcd/sbin/t2slot\` | cut -d- -f1"

}

check_conf () {

	if [ -z "$username" ]; then

		echo "No username ('username' environment variable)!"

		return 1

	fi

	if [ -z "$cs_addr" ]; then

                echo "No control station addresses ('cs_addr' environment variable)!"

		return 1

	fi

	#Choosing Cotrol Station. Code have to be "10"

	for CS in $cs_addr; do

		if [[ "10" -eq "$(ssh_check $CS)" ]]; then

			PRIMARY_CS=$CS

			break

		fi

	done

	if [ -z "$PRIMARY_CS" ]; then

		echo "No alive primary Control Station from list \"$cs_addr\"";

		return 1

	fi

	return 0

}

if [ "$1" = "autoconf" ]; then

	check_conf_ans=$(check_conf)

        if [ $? -eq 0 ]; then

                echo "yes"

        else

                echo "no ($check_conf_ans)"

        fi

        exit 0

fi

check_conf

if [[ $? -eq 1 ]]; then

        exit 1;

fi

SSH="ssh -q $username@$PRIMARY_CS "

for PROBESP in $SPALL; do

	$SSH $NAVICLI -h $PROBESP  > /dev/null 2>&1

	if [ 0 == "$?" ]; then SP="$PROBESP"; break; fi

done

if [ -z "$SP" ]; then

	echo "No active Storage Processor found!";

	exit 1;

fi

NAVICLI="/nas/sbin/navicli -h $SP"

# Get Lun List

LUNLIST="$($SSH $NAVICLI lun -list -drivetype | sed -ne 's/^Name:\ *//p')"

echo -e "host_name ${TARGET}\n"

if [ "$1" = "config" ] ; then

	cat <<-EOF 

	multigraph emc_vnx_block_blocks

	graph_category disk

	graph_title EMC VNX 5300 LUN Blocks

	graph_vlabel Blocks Read (-) / Written (+)

	graph_args --base 1000

	EOF

	while read -r LUN ; do

		cat <<-EOF 

		${LUN}_read.label none

		${LUN}_read.graph no

		${LUN}_read.min 0

		${LUN}_read.draw AREA

		${LUN}_read.type COUNTER

		${LUN}_write.label $LUN Blocks

		${LUN}_write.negative ${LUN}_read

		${LUN}_write.type COUNTER

		${LUN}_write.min 0

		${LUN}_write.draw STACK

		EOF

	done <<< "$LUNLIST"

	cat <<-EOF

	multigraph emc_vnx_block_req

	graph_category disk

	graph_title EMC VNX 5300 LUN Requests

	graph_vlabel Requests: Read (-) / Write (+)

	graph_args --base 1000

	EOF

	while read -r LUN ; do

		cat <<-EOF

		${LUN}_readreq.label none

		${LUN}_readreq.graph no

		${LUN}_readreq.min 0

		${LUN}_readreq.type COUNTER

		${LUN}_writereq.label $LUN Requests

		${LUN}_writereq.negative ${LUN}_readreq

		${LUN}_writereq.type COUNTER

		${LUN}_writereq.min 0

		EOF

	done <<< "$LUNLIST"

	cat <<-EOF

	multigraph emc_vnx_block_ticks

	graph_category disk

	graph_title EMC VNX 5300 Counted Load per LUN

	graph_vlabel Load, % * Number of LUNs 

	graph_args --base 1000 -l 0 -r 

	EOF

	echo -n "graph_order "

	while read -r LUN ; do

                echo -n "${LUN}_busyticks ${LUN}_idleticks ${LUN}_bta=${LUN}_busyticks_spa ${LUN}_idleticks_spa ${LUN}_btb=${LUN}_busyticks_spb ${LUN}_idleticks_spb "

	done <<< "$LUNLIST"

	echo ""

	while read -r LUN ; do

		cat <<-EOF

		${LUN}_busyticks_spa.label $LUN Busy Ticks SPA

		${LUN}_busyticks_spa.type COUNTER

		${LUN}_busyticks_spa.graph no

		${LUN}_bta.label $LUN Busy Ticks SPA

		${LUN}_bta.graph no

		${LUN}_idleticks_spa.label $LUN Idle Ticks SPA

		${LUN}_idleticks_spa.type COUNTER

		${LUN}_idleticks_spa.graph no

		${LUN}_busyticks_spb.label $LUN Busy Ticks SPB

		${LUN}_busyticks_spb.type COUNTER

		${LUN}_busyticks_spb.graph no

		${LUN}_btb.label $LUN Busy Ticks SPB

		${LUN}_btb.graph no

		${LUN}_idleticks_spb.label $LUN Idle Ticks SPB

		${LUN}_idleticks_spb.type COUNTER

		${LUN}_idleticks_spb.graph no

		${LUN}_load_spa.label $LUN load SPA 

		${LUN}_load_spa.draw AREASTACK

		${LUN}_load_spb.label $LUN load SPB

		${LUN}_load_spb.draw AREASTACK

		${LUN}_load_spa.cdef 100,${LUN}_bta,${LUN}_busyticks_spa,${LUN}_idleticks_spa,+,/,*

		${LUN}_load_spb.cdef 100,${LUN}_btb,${LUN}_busyticks_spa,${LUN}_idleticks_spa,+,/,*

		EOF

	done <<< "$LUNLIST"

	cat <<-EOF

	multigraph emc_vnx_block_outstanding

	graph_category disk

	graph_title EMC VNX 5300 Sum of Outstanding Requests

	graph_vlabel Requests

	graph_args --base 1000

	EOF

	while read -r LUN ; do

		cat <<-EOF 

		${LUN}_outstandsum.label $LUN

		${LUN}_outstandsum.type COUNTER

	EOF

	done <<< "$LUNLIST"

	cat <<-EOF

	multigraph emc_vnx_block_nonzeroreq

	graph_category disk

	graph_title EMC VNX 5300 Non-Zero Request Count Arrivals

	graph_vlabel Count Arrivals

	graph_args --base 1000

	EOF

	while read -r LUN ; do

		cat <<-EOF

		${LUN}_nonzeroreq.label $LUN

		${LUN}_nonzeroreq.type COUNTER

		EOF

	done <<< "$LUNLIST"

	cat <<-EOF

	multigraph emc_vnx_block_trespasses

	graph_category disk

	graph_title EMC VNX 5300 Trespasses

	graph_vlabel Trespasses

	EOF

	while read -r LUN ; do

		cat <<-EOF

		${LUN}_implic_tr.label ${LUN} Implicit Trespasses

		${LUN}_explic_tr.label ${LUN} Explicit Trespasses

		EOF

	done <<< "$LUNLIST"

	cat <<-EOF

	multigraph emc_vnx_block_queue

	graph_category disk

	graph_title EMC VNX 5300 Counted Block Queue Length

	graph_vlabel Length

	EOF

	while read -r LUN ; do

		cat <<-EOF

		${LUN}_busyticks_spa.label ${LUN}

		${LUN}_busyticks_spa.graph no

		${LUN}_busyticks_spa.type COUNTER

		${LUN}_idleticks_spa.label ${LUN}

		${LUN}_idleticks_spa.graph no

		${LUN}_idleticks_spa.type COUNTER

		${LUN}_busyticks_spb.label ${LUN}

		${LUN}_busyticks_spb.graph no

		${LUN}_busyticks_spb.type COUNTER

		${LUN}_idleticks_spb.label ${LUN}

		${LUN}_idleticks_spb.graph no

		${LUN}_idleticks_spb.type COUNTER

		${LUN}_outstandsum.label ${LUN}

		${LUN}_outstandsum.graph no

		${LUN}_outstandsum.type COUNTER

		${LUN}_nonzeroreq.label ${LUN}

		${LUN}_nonzeroreq.graph no

		${LUN}_nonzeroreq.type COUNTER

		${LUN}_readreq.label ${LUN}

		${LUN}_readreq.graph no

		${LUN}_readreq.type COUNTER

		${LUN}_writereq.label ${LUN}

		${LUN}_writereq.graph no

		${LUN}_writereq.type COUNTER

		EOF

# Queue Length SPA = ((Sum of Outstanding Requests SPA - NonZero Request Count Arrivals SPA / 2)/(Host Read Requests SPA + Host Write Requests SPA))*

# (Busy Ticks SPA/(Busy Ticks SPA + Idle Ticks SPA)

# We count together SPA and SPB, although it is not fully corrext

		cat <<-EOF

		${LUN}_ql_l_a.label ${LUN} Queue Length SPA

		${LUN}_ql_l_a.cdef ${LUN}_outstandsum,${LUN}_nonzeroreq,2,/,-,${LUN}_readreq,${LUN}_writereq,+,/,${LUN}_busyticks_spa,*,${LUN}_busyticks_spa,${LUN}_idleticks_spa,+,/

		${LUN}_ql_l_b.label ${LUN} Queue Length SPB

		${LUN}_ql_l_b.cdef ${LUN}_outstandsum,${LUN}_nonzeroreq,2,/,-,${LUN}_readreq,${LUN}_writereq,+,/,${LUN}_busyticks_spb,*,${LUN}_busyticks_spb,${LUN}_idleticks_spb,+,/

		EOF

	done <<< "$LUNLIST"

exit 0

fi

#Preparing big complex command to SP's to have most work done remotely.

BIGSSHCMD="$SSH"

while read -r LUN ; do

	BIGSSHCMD+="$NAVICLI lun -list -name $LUN -perfData | 

		sed -ne 's/^Blocks Read\:\ */${LUN}_read.value /p; 

		s/^Blocks Written\:\ */${LUN}_write.value /p;

		s/Read Requests\:\ */${LUN}_readreq.value /p;

		s/Write Requests\:\ */${LUN}_writereq.value /p;

		s/Busy Ticks SP A\:\ */${LUN}_busyticks_spa.value /p;

		s/Idle Ticks SP A\:\ */${LUN}_idleticks_spa.value /p;

		s/Busy Ticks SP B\:\ */${LUN}_busyticks_spb.value /p;

		s/Idle Ticks SP B\:\ */${LUN}_idleticks_spb.value /p;

		s/Sum of Outstanding Requests\:\ */${LUN}_outstandsum.value /p;

		s/Non-Zero Request Count Arrivals\:\ */${LUN}_nonzeroreq.value /p;

		s/Implicit Trespasses\:\ */${LUN}_implic_tr.value /p;

		s/Explicit Trespasses\:\ */${LUN}_explic_tr.value /p;

		' ;"

done <<< "$LUNLIST"

ANSWER="$($BIGSSHCMD)"

echo "multigraph emc_vnx_block_blocks"

echo "$ANSWER" | grep "read\.\|write\."

echo -e "\nmultigraph emc_vnx_block_req"

echo "$ANSWER" | grep "readreq\.\|writereq\."

echo -e "\nmultigraph emc_vnx_block_ticks"

while read -r LUN ; do

	echo "${LUN}_load_spa.value 0"

	echo "${LUN}_load_spb.value 0"

done <<< "$LUNLIST"

echo "$ANSWER" | grep "busyticks_spa\.\|idleticks_spa\."

echo "$ANSWER" | grep "busyticks_spb\.\|idleticks_spb\."

echo -e "\nmultigraph emc_vnx_block_outstanding"

echo "$ANSWER" | grep "outstandsum\."

echo -e "\nmultigraph emc_vnx_block_nonzeroreq"

echo "$ANSWER" | grep "nonzeroreq\."

echo -e "\nmultigraph emc_vnx_block_trespasses"

echo "$ANSWER" | grep "implic_tr\.\|explic_tr\."

echo -e "\nmultigraph emc_vnx_block_queue"

# Queue Length

	echo "$ANSWER" | grep "busyticks"

	echo "$ANSWER" | grep "idleticks."

	echo "$ANSWER" | grep "outstandsum\."

	echo "$ANSWER" | grep "nonzeroreq\."

	echo "$ANSWER" | grep "readreq\."

	echo "$ANSWER" | grep "writereq\."

while read -r LUN ; do

	echo "${LUN}_ql_l_a.value 0 "

	echo "${LUN}_ql_l_b.value 0 "

done <<< "$LUNLIST"

exit 0