使用 php rrdtool 工具畫機房溫度圖
建立 rrd 檔案. 然後更新溫度資訊到 rrd 檔案內 :
initial rrd file and update temperature into rrd file :
// update.php
$rrd_file = "r733.rrd";
function init_rrd() {
global $rrd_file;
$opts = array("--step", "300", "--start", 0,
"DS:Battery:GAUGE:600:1:100",
"DS:EMU:GAUGE:600:1:100",
"RRA:AVERAGE:0.5:1:600",
"RRA:AVERAGE:0.5:6:700",
"RRA:AVERAGE:0.5:24:775",
"RRA:AVERAGE:0.5:288:797",
"RRA:MAX:0.5:1:600",
"RRA:MAX:0.5:6:700",
"RRA:MAX:0.5:24:775",
"RRA:MAX:0.5:288:797");
$rtn = rrd_create($rrd_file, $opts, count($opts));
if ($rtn == 0) {
$err = rrd_error();
exit("ERROR : $err\n");
}
} // end function init_rrd()
function update_rrd() {
global $rrd_file;
$battery_cmd = "/usr/bin/snmpwalk -v 1 -c public 192.168.170.250 1.3.6.1.4.1.318.1.1.1.2.2.2.0";
$emu_cmd = "/usr/bin/snmpwalk -v 1 -c public 192.168.170.250 1.3.6.1.4.1.318.1.1.10.2.3.2.1.4.1";
$flag = true;
while($flag) {
$battery_temperature = "";
$emu_temperature = "";
while($battery_temperature == "") {
$output = shell_exec($battery_cmd);
$battery_temperature = trim(str_replace("SNMPv2-SMI::enterprises.318.1.1.1.2.2.2.0 = Gauge32:", "", $output));
if ($battery_temperature == "") sleep(5);
}
while($emu_temperature == "") {
$output = shell_exec($emu_cmd);
$emu_temperature = trim(str_replace("SNMPv2-SMI::enterprises.318.1.1.10.2.3.2.1.4.1 = INTEGER:", "", $output));
if ($emu_temperature == "") sleep(5);
}
$battery_temperature = (int)$battery_temperature;
$emu_temperature = (int)$emu_temperature;
$rtn = rrd_update($rrd_file, "N:$battery_temperature:$emu_temperature");
if ($rtn == 0) {
$err = rrd_error();
exit("ERROR : $err\n");
}
if (isset($_GET["t"])) {
sleep(300);
} else {
$flag = false;
}
} // end while(true)
} // end function update_rrd()
if (file_exists($rrd_file)) {
update_rrd();
} else {
init_rrd();
update_rrd();
}
畫 rrd 圖 :
draw rrd graphs :
// index.php
$rrd_file = "r733.rrd";
include_once "update_r733.php";
function draw_rrd() {
global $rrd_file;
$opts = array( "--start", "-1h", "--vertical-label=deg C", "--title=R733 Temperature last hour",
"DEF:battery=".$rrd_file.":Battery:AVERAGE",
"DEF:emu=".$rrd_file.":EMU:AVERAGE",
"COMMENT: Max Average Last\\n",
"AREA:battery#99CC00:Battery \:",
"GPRINT:battery:MAX:%2.0lfdeg C",
"GPRINT:battery:AVERAGE:%2.0lfdeg C",
"GPRINT:battery:LAST:%2.0lfdeg C\\r",
"LINE2:emu#6699CC:EMU \:",
"GPRINT:emu:MAX:%2.0lfdeg C",
"GPRINT:emu:AVERAGE:%2.0lfdeg C",
"GPRINT:emu:LAST:%2.0lfdeg C\\r"
);
$ret = rrd_graph("r733_1h.gif", $opts, count($opts));
if(!is_array($ret)) {
$err = rrd_error();
exit("draw_rrd() ERROR: $err\n");
}
$opts = array( "--start", "-1d", "--vertical-label=deg C", "--title=R733 Temperature last day",
"DEF:battery=".$rrd_file.":Battery:AVERAGE",
"DEF:emu=".$rrd_file.":EMU:AVERAGE",
"COMMENT: Max Average Last\\n",
"AREA:battery#99CC00:Battery \:",
"GPRINT:battery:MAX:%2.0lfdeg C",
"GPRINT:battery:AVERAGE:%2.0lfdeg C",
"GPRINT:battery:LAST:%2.0lfdeg C\\r",
"LINE2:emu#6699CC:EMU \:",
"GPRINT:emu:MAX:%2.0lfdeg C",
"GPRINT:emu:AVERAGE:%2.0lfdeg C",
"GPRINT:emu:LAST:%2.0lfdeg C\\r"
);
$ret = rrd_graph("r733_1d.gif", $opts, count($opts));
if(!is_array($ret)) {
$err = rrd_error();
exit("draw_rrd() ERROR: $err\n");
}
$opts = array( "--start", "-1w", "--vertical-label=deg C", "--title=R733 Temperature last week",
"DEF:battery=".$rrd_file.":Battery:AVERAGE",
"DEF:emu=".$rrd_file.":EMU:AVERAGE",
"COMMENT: Max Average Last\\n",
"AREA:battery#99CC00:Battery \:",
"GPRINT:battery:MAX:%2.0lfdeg C",
"GPRINT:battery:AVERAGE:%2.0lfdeg C",
"GPRINT:battery:LAST:%2.0lfdeg C\\r",
"LINE2:emu#6699CC:EMU \:",
"GPRINT:emu:MAX:%2.0lfdeg C",
"GPRINT:emu:AVERAGE:%2.0lfdeg C",
"GPRINT:emu:LAST:%2.0lfdeg C\\r"
);
$ret = rrd_graph("r733_1w.gif", $opts, count($opts));
if(!is_array($ret)) {
$err = rrd_error();
exit("draw_rrd() ERROR: $err\n");
}
$opts = array( "--start", "-1m", "--vertical-label=deg C", "--title=R733 Temperature last month",
"DEF:battery=".$rrd_file.":Battery:AVERAGE",
"DEF:emu=".$rrd_file.":EMU:AVERAGE",
"COMMENT: Max Average Last\\n",
"AREA:battery#99CC00:Battery \:",
"GPRINT:battery:MAX:%2.0lfdeg C",
"GPRINT:battery:AVERAGE:%2.0lfdeg C",
"GPRINT:battery:LAST:%2.0lfdeg C\\r",
"LINE2:emu#6699CC:EMU \:",
"GPRINT:emu:MAX:%2.0lfdeg C",
"GPRINT:emu:AVERAGE:%2.0lfdeg C",
"GPRINT:emu:LAST:%2.0lfdeg C\\r"
);
$ret = rrd_graph("r733_1m.gif", $opts, count($opts));
if(!is_array($ret)) {
$err = rrd_error();
exit("draw_rrd() ERROR: $err\n");
}
$opts = array( "--start", "-1y", "--vertical-label=deg C", "--title=R733 Temperature last year",
"DEF:battery=".$rrd_file.":Battery:AVERAGE",
"DEF:emu=".$rrd_file.":EMU:AVERAGE",
"COMMENT: Max Average Last\\n",
"AREA:battery#99CC00:Battery \:",
"GPRINT:battery:MAX:%2.0lfdeg C",
"GPRINT:battery:AVERAGE:%2.0lfdeg C",
"GPRINT:battery:LAST:%2.0lfdeg C\\r",
"LINE2:emu#6699CC:EMU \:",
"GPRINT:emu:MAX:%2.0lfdeg C",
"GPRINT:emu:AVERAGE:%2.0lfdeg C",
"GPRINT:emu:LAST:%2.0lfdeg C\\r"
);
$ret = rrd_graph("r733_1y.gif", $opts, count($opts));
if(!is_array($ret)) {
$err = rrd_error();
exit("draw_rrd() ERROR: $err\n");
}
} // end function draw_rrd()
draw_rrd();
?>
在 linux 內執行 curl http://xxx.liho.tw/temperature/update.php & 這樣就可以每 300 秒回報一次溫度.
展示畫一天的溫度的rrd圖 :