docker stats app (#12358)

* docker stat app support

* Add missing doc and app

* stylci

* styleci

* styleci

* Add test data

* add snmpsim

* Update docker.inc.php

test with use Number::Bi

* typo

* Add tests

* Add tests

Co-authored-by: Jellyfrog <Jellyfrog@users.noreply.github.com>

includes/html/graphs/application/docker-common.inc.php

@@ -0,0 +1,36 @@
+<?php
+
+$name = 'docker';
+$app_id = $app['app_id'];
+$colours = 'mega';
+$dostack = 0;
+$printtotal = 0;
+$addarea = 1;
+$transparency = 15;
+
+$unitlen = 20;
+$bigdescrlen = 25;
+$smalldescrlen = 25;
+
+if (isset($vars['container'])) {
+    $containers = [$vars['container']];
+} else {
+    $containers = get_arrays_with_application($device, $app['app_id'], 'docker');
+}
+
+$int = 0;
+while (isset($containers[$int])) {
+    $container_name = $containers[$int];
+    $rrd_filename = rrd_name($device['hostname'], ['app', $name, $app_id, $container_name]);
+
+    if (rrdtool_check_rrd_exists($rrd_filename)) {
+        $rrd_list[] = [
+            'filename' => $rrd_filename,
+            'descr'    => $container_name,
+            'ds'       => $rrdVar,
+        ];
+    }
+    $int++;
+}
+
+require 'includes/html/graphs/generic_multi_line_exact_numbers.inc.php';

includes/html/graphs/application/docker_cpu_usage.inc.php

@@ -0,0 +1,7 @@
+<?php
+
+$unit_text = 'CPU (%)';
+$rrdVar = 'cpu_usage';
+$divider = 100;
+
+require 'docker-common.inc.php';

includes/html/graphs/application/docker_mem_limit.inc.php

@@ -0,0 +1,6 @@
+<?php
+
+$unit_text = 'Memory Limit';
+$rrdVar = 'mem_limit';
+
+require 'docker-common.inc.php';

includes/html/graphs/application/docker_mem_perc.inc.php

@@ -0,0 +1,7 @@
+<?php
+
+$unit_text = 'Memory (%)';
+$rrdVar = 'mem_perc';
+$divider = 100;
+
+require 'docker-common.inc.php';

includes/html/graphs/application/docker_mem_used.inc.php

@@ -0,0 +1,6 @@
+<?php
+
+$unit_text = 'Memory used';
+$rrdVar = 'mem_used';
+
+require 'docker-common.inc.php';

includes/html/graphs/application/docker_pids.inc.php

@@ -0,0 +1,6 @@
+<?php
+
+$unit_text = 'PIDs (count)';
+$rrdVar = 'pids';
+
+require 'docker-common.inc.php';