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snmp__if_combined: add support for multiple instances

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This allows to split the data into smaller groups, e.g., per ifType.

Signed-off-by: Olivier Mehani <shtrom@ssji.net>
This commit is contained in:
Olivier Mehani 2022-01-05 22:51:16 +11:00
parent 387bb863f1
commit 4262dc8564
1 changed files with 40 additions and 12 deletions
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52
plugins/snmp/snmp__if_combined
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@ -74,6 +74,28 @@ would normally be for VPNs. A minor horde of different interface types
are supposted, please see IANAifType-MIB (on your system or find with
Google) for a full list.
=head2 MULTIPLE INSTANCES
It is possible to run multiple instances of the plugin for the same host. This
is most useful to generate separate views for groups of ifTypes (e.g.,
ethernetCsmacd, ieee82011, l2vlan, ...).
New instances should be symlinked to the script with an underscore-separated
suffix. A matching configuration file should be present to specify the required
ifTypes (or any other relevant parameters).
$ readlink /etc/munin/plugins/snmp_192.2.0.1_if_combined_vlan
/path/to/munin-contrib/plugins/snmp/snmp__if_combined
$ sudo cat /etc/munin/plugin-conf.d/snmp_192.2.0.1_if_combined_vlan
env.ifTypeOnly l2vlan
The suffix will be appended to the graph base name, e.g.,
`snmp_<HOST>_if_combined_<SUFFIX>` will generate the `snmp_if_combined_<SUFFIX>`
multigraph and associated series for the selected `<HOST>`.
=head2 STACKED ROOT GRAPH
The `stackedRoot` option determines whether the root summary graph shows the
traffic on each interface separately, or stacks them on top of one another to
show the total traffic through the device.
@ -211,6 +233,12 @@ use strict;
use Munin::Plugin;
use Munin::Plugin::SNMP;
my $scriptname='snmp_if_combined';
my @scriptname_components= split(/_/,$0);
if ($scriptname_components[-1] ne 'combined') {
$scriptname .= "_${scriptname_components[-1]}";
}
my $response;
my $iface;
@ -611,7 +639,7 @@ sub do_config_root {
print <<END;
multigraph snmp_if_combined
multigraph $scriptname
graph_title All interfaces traffic
graph_args --base 1000
graph_vlabel bits in (-) / out (+) per \${graph_period}
@ -622,8 +650,8 @@ END
print "graph_order";
my @ifs;
foreach my $if (sort {$a <=> $b} keys %{$snmpinfo}) {
print " recv$if=snmp_if_combined.$if.recv send$if=snmp_if_combined.$if.send";
push @ifs, "snmp_if_combined.$if";
print " recv$if=$scriptname.$if.recv send$if=$scriptname.$if.send";
push @ifs, "$scriptname.$if";
}
if ($stackedRoot) {
print " recv_bits send_bits";
@ -679,7 +707,7 @@ END
}
print <<END;
multigraph snmp_if_combined_err
multigraph ${scriptname}_err
graph_title All interfaces errors
graph_args --base 1000
graph_vlabel errors in (-) / out (+) per \${graph_period}
@ -688,7 +716,7 @@ END
print "graph_order";
foreach my $if (sort {$a <=> $b} keys %{$snmpinfo}) {
print " recv$if=snmp_if_combined_err.$if.total_in send$if=snmp_if_combined_err.$if.total_out";
print " recv$if=${scriptname}_err.$if.total_in send$if=${scriptname}_err.$if.total_out";
}
print "\n";
@ -761,7 +789,7 @@ sub do_config_if {
$extrainfo .= " This is a '".$ifTypeByNum{$response}."' interface.";
print <<END;
multigraph snmp_if_combined.$if
multigraph $scriptname.$if
graph_title $alias traffic
graph_info This graph shows traffic for the \"$alias\" network interface.$extrainfo
graph_args --base 1000
@ -787,7 +815,7 @@ END
}
print <<END;
multigraph snmp_if_combined_err.$if
multigraph ${scriptname}_err.$if
graph_title $alias errors
graph_info This graph shows errors for the \"$alias\" network interface.$extrainfo
graph_args --base 1000
@ -836,11 +864,11 @@ sub do_fetch_if {
if ($status != 1) {
# Interface is down
print <<END;
multigraph snmp_if_combined.$if
multigraph $scriptname.$if
recv.value U
send.value U
send.extinfo This interface is currently down.
multigraph snmp_if_combined_err.$if
multigraph ${scriptname}_err.$if
errors_in.value U
errors_out.value U
discards_in.value U
@ -856,7 +884,7 @@ END
my $recv;
my $send;
print "multigraph snmp_if_combined.$if\n";
print "multigraph $scriptname.$if\n";
$response = $snmpinfoX->{$if}->{ifHCInOctets} || $snmpinfo->{$if}->{ifInOctets};
$recv = defined($response) ? ($response * 8) : undef;
@ -866,7 +894,7 @@ END
$send = defined($response) ? ($response * 8) : undef;
printf("send.value %s\n", $send || "U");
print "multigraph snmp_if_combined_err.$if\n";
print "multigraph ${scriptname}_err.$if\n";
my $errors = $snmpinfo->{$if}->{ifInErrors};
my $discards = $snmpinfo->{$if}->{ifInDiscards};
@ -925,7 +953,7 @@ foreach my $if (sort {$a <=> $b} keys %{$snmpinfo}) {
$send += ($send_if || 0);
}
if ($stackedRoot) {
print "multigraph snmp_if_combined\n";
print "multigraph $scriptname\n";
print "recv_bits.value $recv\n";
print "send_bits.value $send\n";
}