ns-api: add ns.netdata

packages/ns-api/Makefile

@@ -101,6 +101,8 @@ define Package/ns-api/install
 	$(INSTALL_DATA) ./files/ns.mwan.json $(1)/usr/share/rpcd/acl.d/
 	$(INSTALL_BIN) ./files/ns.dpi $(1)/usr/libexec/rpcd/
 	$(INSTALL_DATA) ./files/ns.dpi.json $(1)/usr/share/rpcd/acl.d/
+	$(INSTALL_BIN) ./files/ns.netdata $(1)/usr/libexec/rpcd/
+	$(INSTALL_DATA) ./files/ns.netdata.json $(1)/usr/share/rpcd/acl.d/
 	$(INSTALL_BIN) ./files/ns.storage $(1)/usr/libexec/rpcd/
 	$(INSTALL_DATA) ./files/ns.storage.json $(1)/usr/share/rpcd/acl.d/
 	$(INSTALL_BIN) ./files/ns.account $(1)/usr/libexec/rpcd/

packages/ns-api/README.md

@@ -3247,3 +3247,36 @@ Result example:
   ]
 }
 ```
+
+## ns.netdata
+
+Configure netdata reporting daemon.
+
+### get-configuration
+
+Get current netdata configuration:
+```
+api-cli ns.netdata get-configuration
+```
+
+Response example:
+```json
+{
+  "hosts": [
+    "1.2.3.4",
+    "google.it"
+  ]
+}
+```
+
+### set-hosts
+
+Configure hosts to be monitored by fping:
+```
+api-cli ns.netdata set-hosts --data '{"hosts": ["1.1.1.1", "google.com"]}'
+```
+
+Response example:
+```json
+{"result": "success"}
+```

packages/ns-api/files/ns.netdata

@@ -0,0 +1,66 @@
+#!/usr/bin/python3
+
+#
+# Copyright (C) 2023 Nethesi3 S.r.l.
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+# Read and set fping configuration for netdata
+
+import os
+import sys
+import json
+import subprocess
+import configparser
+
+fping_conf_file = "/etc/netdata/fping.conf"
+netdata_conf_file = "/etc/netdata/netdata.conf"
+
+def get_config():
+    hosts = []
+    # create a simpligied fping.conf if not exists
+    # the file must contain only one line: hosts=""
+    if not os.path.exists(fping_conf_file):
+        with open(fping_conf_file, 'w') as fp:
+            fp.write('hosts=""\n')
+    # parse the simplified config file
+    try:
+        with open(fping_conf_file, 'r') as fp:
+            line = fp.readline()
+            line = line[7:-2]
+            hosts = line.split(" ")
+    except:
+       pass
+    return {"hosts": hosts}
+
+def set_config(config):
+    # Enable and disable fping plugin on netdata
+    nparser = configparser.ConfigParser()
+    nparser.read(netdata_conf_file)
+    if len(config['hosts']) > 0:
+        nparser['plugins']['fping'] = 'yes'
+    else:
+        nparser['plugins']['fping'] = 'no'
+    with open(netdata_conf_file, 'w') as fpc:
+        nparser.write(fpc)
+
+    try:
+        with open(fping_conf_file, 'w') as fp:
+            hosts = " ".join(config['hosts'])
+            fp.write(f'hosts="{hosts}"\n')
+            subprocess.run(["/etc/init.d/netdata", "restart"], check=True)
+        return {"success": True}
+    except:
+        return {"success": False}
+
+cmd = sys.argv[1]
+
+if cmd == 'list':
+    print(json.dumps({"get-configuration": {}, "set-hosts": {"hosts": ["1.1.1.1", "google.com"]}}))
+else:
+    action = sys.argv[2]
+    if action == "get-configuration":
+        print(json.dumps(get_config()))
+    elif action == "set-hosts":
+        args = json.loads(sys.stdin.read())
+        print(json.dumps(set_config(args)))

packages/ns-api/files/ns.netdata.json

@@ -0,0 +1,13 @@
+{
+  "netdata-manager": {
+    "description": "Read and set netdata configuration",
+    "write": {},
+    "read": {
+      "ubus": {
+        "ns.netdata": [
+          "*"
+        ]
+      }
+    }
+  }
+}