Zabbix：接口值的最大值

Question

我使用“模板 SMNP 接口”来监控交换机。

它给了我类似的键：ifOutOctets[16]

我想要一个覆盖所有端口的物品：

MaxOutOctets = max(ifOutOctets[*])

我可以在图表中使用它。

我读过了 https://www.zabbix.com/documentation/2.2/manual/config/items/itemtypes/calculated 但我似乎无法正确理解语法。

Answer 1

不幸的是，您所寻求的功能目前还无法实现，但是有一个功能请求：ZBXNEXT-1829。 要求ZBXNEXT-1420和ZBXNEXT-1521也相关。

Answer 2

解决方法（其他人可能会发现这很有帮助）：

#!/usr/bin/perl                                                                                                                                                                                                                        

# This program reads off traffic from a switch by SNMP.                                                                                                                                                                                
# It compares the values with last run and returns the value of the port with the biggest change                                                                                                                                       
#                                                                                                                                                                                                                                      
# Usage:                                                                                                                                                                                                                               
#    snmp_max_io 192.168.1.1                                                                                                                                                                                                           
#                                                                                                                                                                                                                                      
# (C) 2014-09-29 Ole Tange                                                                                                                                                                                                             
# License: GPLv3                                                                                                                                                                                                                       

my $switch = shift;

my ($last,$this) = update_cache_file($switch);
my %delta = delta($last,$this);
my $max = max(values %delta);
print "$max\n";
`logger $0 $switch returned $max`;

sub delta {
    my ($last,$this) = @_;
    # IF-MIB::ifHCOutOctets.45 = Counter64: 262606806485                                                                                                                                                                               
    my %last = map { split /: /,$_ } grep /Counter/, @$last;
    my %this = map { split /: /,$_ } grep /Counter/, @$this;
    my %delta = map { $_ => undef_as_zero($this{$_}) - undef_as_zero($last{$_}) }
    keys %last, keys %this;
    return %delta;
}

sub undef_as_zero {
    my $a = shift;
    return $a ? $a : 0;
}

sub my_dump {
    # Returns:                                                                                                                                                                                                                         
    #   ascii expression of object if Data::Dump(er) is installed                                                                                                                                                                      
    #   error code otherwise                                                                                                                                                                                                           
    my @dump_this = (@_);
    eval "use Data::Dump qw(dump);";
    if ($@) {
        # Data::Dump not installed                                                                                                                                                                                                     
        eval "use Data::Dumper;";
        if ($@) {
            my $err =  "Neither Data::Dump nor Data::Dumper is installed\n".
                "Not dumping output\n";
            print $Global::original_stderr $err;
            return $err;
        } else {
            return Dumper(@dump_this);
        }
    } else {
    # Create a dummy Data::Dump:dump as Hans Schou sometimes has                                                                                                                                                                       
    # it undefined                                                                                                                                                                                                                     
    eval "sub Data::Dump:dump {}";
        eval "use Data::Dump qw(dump);";
        return (Data::Dump::dump(@dump_this));
    }
}

sub update_cache_file {
    # Input:                                                                                                                                                                                                                           
    #   $switch = DNS name or IP address of switch                                                                                                                                                                                     
    my $switch = shift;
    my $tmpdir = "/tmp/switch-$ENV{USER}";
    my $tmpfile = "$tmpdir/snmp_last_$switch";
    mkdir $tmpdir;
    chmod 0700, $tmpdir || die;
    my @last = `cat $tmpfile 2>/dev/null`;
    my @this = snmpget_io($switch);
    open(OUT,">",$tmpfile) || die;
    print OUT @this;
    close OUT;
    if(not @last) {
    @last = @this;
    }
    return (\@last,\@this);
}

sub snmpget_io {
    # Input:                                                                                                                                                                                                                           
    #   $switch = DNS name or IP address of switch                                                                                                                                                                                     
    my $switch = shift;
    # Requires snmp-mibs-downloader installed                                                                                                                                                                                          
    return qx{ bash -c 'snmpget -v 2c -c public $switch IF-MIB::ifHCInOctets.{1..60}; snmpget -v 2c -c public $switch IF-MIB::ifHCOutOctets.{1..60};' }
}

sub max {
    # Returns:                                                                                                                                                                                                                         
    #   Maximum value of array                                                                                                                                                                                                         
    my $max;
    for (@_) {
        # Skip undefs                                                                                                                                                                                                                  
        defined $_ or next;
        defined $max or do { $max = $_; next; }; # Set $_ to the first non-undef                                                                                                                                                       
        $max = ($max > $_) ? $max : $_;
    }
    return $max;
}