add monitoring for freifunk nodes

bundles/icinga2/files/check_freifunk_node

@@ -0,0 +1,78 @@
+#!/usr/bin/env python3
+
+from requests import get
+from sys import argv, exit
+
+meshviewer_url = argv[1]
+node_id = argv[2]
+node = None
+
+try:
+    for n in get(meshviewer_url).json()['nodes']:
+        if node_id == n['node_id']:
+            node = n
+            break
+
+    if not node:
+        print('CRITICAL: Node {} not found in {}'.format(
+            node_id,
+            meshviewer_url,
+        ))
+        exit(2)
+
+    if not node['is_online']:
+        print('CRITICAL: Node "{}" is offline!'.format(
+            node['hostname'],
+        ))
+        exit(2)
+
+    crit = set()
+    warn = set()
+    if node['loadavg'] > 1:
+        warn.add('has high load: {}'.format(
+            node['loadavg'],
+        ))
+
+    if node['rootfs_usage'] > 0.9:
+        crit.add('rootfs usage is {}%'.format(
+            int(node['rootfs_usage']*100)
+        ))
+    elif node['rootfs_usage'] > 0.8:
+        warn.add('rootfs usage is {}%'.format(
+            int(node['rootfs_usage']*100)
+        ))
+
+    if node['memory_usage'] > 0.9:
+        crit.add('ram usage is {}%'.format(
+            int(node['memory_usage']*100)
+        ))
+    elif node['memory_usage'] > 0.8:
+        warn.add('ram usage is {}%'.format(
+            int(node['memory_usage']*100)
+        ))
+
+
+    for line in sorted(crit):
+        print('CRITICAL: Node "{}" {}'.format(
+            node['hostname'],
+            line,
+        ))
+
+    for line in sorted(warn):
+        print('WARNING: Node "{}" {}'.format(
+            node['hostname'],
+            line,
+        ))
+
+    if crit:
+        exit(2)
+    elif warn:
+        exit(1)
+    else:
+        print('Node "{}" reports no errors'.format(
+            node['hostname'],
+        ))
+        exit(0)
+except Exception as e:
+    print(repr(e))
+    exit(3)

bundles/icinga2/files/icinga2/check_commands.conf

@@ -25,6 +25,13 @@ object CheckCommand "dummy_hostalive" {
     command = [ "true" ]
 }
 
+object CheckCommand "check_freifunk_node" {
+    import "plugin-check-command"
+    import "ipv4-or-ipv6"
+
+    command = [ "/usr/local/share/icinga/plugins/check_freifunk_node", "$url$", "$id$" ]
+}
+
 object CheckCommand "check_http_wget" {
     import "plugin-check-command"
     import "ipv4-or-ipv6"