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--- tips:zabbix [2021/06/28 11:00] – created scipio
+++ tips:zabbix [2021/08/02 11:22] (current) – fmussati
@@ Line 1: / Line 1: @@
 ====== Zabbix ======
+===== task =====
+  * <del>dashboard con conteggi aggregati (e altri grafici interessanti)</del>
+  * <del>trigger di allarme:
+    * luce accesa da troppo tempo</del>
+  * <del>export dati csv con API</del>
+  * <del>gestire utente non privilegiato su zabbix</del>
+  * <del>VPN robusta che riparte quando il cloud non è raggiungibile</del>
+  * gestire il mancato boot della componente zabbix di hass
+    * /etc/openvpn/iotaiuto.conf ?
+    * come far ripartire la connessione zabbix all'interno di hass ?
+  * esphome:
+    * costruire in power meter con allarme su alexa
+    * costruire un citofono con ESP32 CAM
+===== API =====
@@ Line 139: / Line 156: @@
     }
     " $url
+</code>
+<code bash>
+#!/bin/bash
+# 1. set connection details
+url=http://monitor.iotaiuto.it/api_jsonrpc.php
+user=username
+password=passwd
+# 2. get authorization token
+auth=$(curl -s -X POST \
+-H 'Content-Type: application/json-rpc' \
+-d " \
+{
+ \"jsonrpc\": \"2.0\",
+ \"method\": \"user.login\",
+ \"params\": {
+  \"user\": \"$user\",
+  \"password\": \"$password\"
+ },
+ \"id\": 1,
+ \"auth\": null
+}
+" $url | \
+jq -r '.result'
+)
+# 3. show triggers in problem state
+curl -s -X POST \
+-H 'Content-Type: application/json-rpc' \
+-d " \
+{
+ \"jsonrpc\": \"2.0\",
+    \"method\": \"trigger.get\",
+    \"params\": {
+        \"output\": \"extend\",
+        \"selectHosts\": \"extend\",
+        \"filter\": {
+            \"value\": 1
+        },
+        \"sortfield\": \"priority\",
+        \"sortorder\": \"DESC\"
+    },
+    \"auth\": \"$auth\",
+    \"id\": 1
+}
+" $url | \
+jq -r '.result' > ../flussi/dati.json
+jq -r 'del(.[].hosts) | (map(keys) | add | unique) as $cols | map(. as $row | $cols | map($row[.])) as $rows | $cols, $rows[] | @csv' ../flussi/dati.json > ../flussi/dati_trigger.csv
+jq -r '(map(.hosts[] + {"triggerid": .triggerid} | keys) | add | unique) as $cols | map(. as $row | $cols | map($row[.])) as $rows | $cols, $rows[] | @csv' ../flussi/dati.json > ../flussi/dati_host.csv
+rm ../flussi/dati.json
+cat ../flussi/dati_trigger.csv & ../flussi/dati_host.csv
+# 4. logout user
+curl -s -X POST \
+-H 'Content-Type: application/json-rpc' \
+-d " \
+{
+    \"jsonrpc\": \"2.0\",
+    \"method\": \"user.logout\",
+    \"params\": [],
+    \"id\": 1,
+    \"auth\": \"$auth\"
+}
+" $url
+</code>
+===== Patch infinite componente zabbix =====
+<code python>
+class ZabbixThread(threading.Thread):
+    """A threaded event handler class."""
+    # Rename to TRIES and set to 0
+    MAX_TRIES = 3
+    def __init__(self, hass, zabbix_sender, event_to_metrics):
+        """Initialize the listener."""
+        threading.Thread.__init__(self, name="Zabbix")
+        self.queue = queue.Queue()
+        self.zabbix_sender = zabbix_sender
+        self.event_to_metrics = event_to_metrics
+        self.write_errors = 0
+        self.shutdown = False
+        self.float_keys = set()
+        self.string_keys = set()
+    def setup(self, hass):
+        """Set up the thread and start it."""
+        hass.bus.listen(EVENT_STATE_CHANGED, self._event_listener)
+        hass.bus.listen_once(EVENT_HOMEASSISTANT_STOP, self._shutdown)
+        self.start()
+        _LOGGER.debug("Started publishing state changes to Zabbix")
+    def _shutdown(self, event):
+        """Shut down the thread."""
+        self.queue.put(None)
+        self.join()
+    @callback
+    def _event_listener(self, event):
+        """Listen for new messages on the bus and queue them for Zabbix."""
+        item = (time.monotonic(), event)
+        self.queue.put(item)
+    def get_metrics(self):
+        """Return a batch of events formatted for writing."""
+        # Replace MAX_TRIES to TRIES
+        queue_seconds = QUEUE_BACKLOG_SECONDS + self.MAX_TRIES * RETRY_DELAY
+        count = 0
+        metrics = []
+        dropped = 0
+        with suppress(queue.Empty):
+            while len(metrics) < BATCH_BUFFER_SIZE and not self.shutdown:
+                timeout = None if count == 0 else BATCH_TIMEOUT
+                item = self.queue.get(timeout=timeout)
+                count += 1
+                if item is None:
+                    self.shutdown = True
+                else:
+                    timestamp, event = item
+                    age = time.monotonic() - timestamp
+                    if age < queue_seconds:
+                        event_metrics = self.event_to_metrics(
+                            event, self.float_keys, self.string_keys
+                        )
+                        if event_metrics:
+                            metrics += event_metrics
+                    else:
+                        dropped += 1
+        if dropped:
+            _LOGGER.warning("Catching up, dropped %d old events", dropped)
+        return count, metrics
+    def write_to_zabbix(self, metrics):
+        """Write preprocessed events to zabbix, with retry."""
+        # while True:
+        for retry in range(self.MAX_TRIES + 1):
+            try:
+                self.zabbix_sender.send(metrics)
+                if self.write_errors:
+                    _LOGGER.error("Resumed, lost %d events", self.write_errors)
+                    self.write_errors = 0
+                _LOGGER.debug("Wrote %d metrics", len(metrics))
+                # Put [self.TRIES = 0]
+                break
+            except OSError as err:
+                # [time.sleep(RETRY_DELAY)] out of [if retry < self.MAX_TRIES:]
+                if retry < self.MAX_TRIES:
+                    # Put [self.TRIES += 1]
+                    time.sleep(RETRY_DELAY)
+                else:
+                    if not self.write_errors:
+                        _LOGGER.error("Write error: %s", err)
+                    self.write_errors += len(metrics)
 </code>