1 files changed, 159 insertions, 0 deletions
diff --git a/python.d/portcheck.chart.py b/python.d/portcheck.chart.py
new file mode 100644
index 000000000..0a312210d
--- /dev/null
+++ b/python.d/portcheck.chart.py
@@ -0,0 +1,159 @@
+# -*- coding: utf-8 -*-
+# Description: simple port check netdata python.d module
+# Original Author: ccremer (github.com/ccremer)
+
+import socket
+
+try:
+    from time import monotonic as time
+except ImportError:
+    from time import time
+
+from bases.FrameworkServices.SimpleService import SimpleService
+
+# default module values (can be overridden per job in `config`)
+priority = 60000
+retries = 60
+
+PORT_LATENCY = 'connect'
+
+PORT_SUCCESS = 'success'
+PORT_TIMEOUT = 'timeout'
+PORT_FAILED = 'no_connection'
+
+ORDER = ['latency', 'status']
+
+CHARTS = {
+    'latency': {
+        'options': [None, 'TCP connect latency', 'ms', 'latency', 'portcheck.latency', 'line'],
+        'lines': [
+            [PORT_LATENCY, 'connect', 'absolute', 100, 1000]
+        ]
+    },
+    'status': {
+        'options': [None, 'Portcheck status', 'boolean', 'status', 'portcheck.status', 'line'],
+        'lines': [
+            [PORT_SUCCESS, 'success', 'absolute'],
+            [PORT_TIMEOUT, 'timeout', 'absolute'],
+            [PORT_FAILED, 'no connection', 'absolute']
+        ]}
+}
+
+
+# Not deriving from SocketService, too much is different
+class Service(SimpleService):
+    def __init__(self, configuration=None, name=None):
+        SimpleService.__init__(self, configuration=configuration, name=name)
+        self.order = ORDER
+        self.definitions = CHARTS
+        self.host = self.configuration.get('host')
+        self.port = self.configuration.get('port')
+        self.timeout = self.configuration.get('timeout', 1)
+
+    def check(self):
+        """
+        Parse configuration, check if configuration is available, and dynamically create chart lines data
+        :return: boolean
+        """
+        if self.host is None or self.port is None:
+            self.error("Host or port missing")
+            return False
+        if not isinstance(self.port, int):
+            self.error('"port" is not an integer. Specify a numerical value, not service name.')
+            return False
+
+        self.debug("Enabled portcheck: {host}:{port}, update every {update}s, timeout: {timeout}s".format(
+            host=self.host, port=self.port, update=self.update_every, timeout=self.timeout
+        ))
+        # We will accept any (valid-ish) configuration, even if initial connection fails (a service might be down from
+        # the beginning)
+        return True
+
+    def _get_data(self):
+        """
+        Get data from socket
+        :return: dict
+        """
+        data = dict()
+        data[PORT_SUCCESS] = 0
+        data[PORT_TIMEOUT] = 0
+        data[PORT_FAILED] = 0
+
+        success = False
+        try:
+            for socket_config in socket.getaddrinfo(self.host, self.port, socket.AF_UNSPEC, socket.SOCK_STREAM):
+                # use first working socket
+                sock = self._create_socket(socket_config)
+                if sock is not None:
+                    self._connect2socket(data, socket_config, sock)
+                    self._disconnect(sock)
+                    success = True
+                    break
+        except socket.gaierror as error:
+            self.debug('Failed to connect to "{host}:{port}", error: {error}'.format(
+                host=self.host, port=self.port, error=error
+            ))
+
+        # We could not connect
+        if not success:
+            data[PORT_FAILED] = 1
+
+        return data
+
+    def _create_socket(self, socket_config):
+        af, sock_type, proto, canon_name, sa = socket_config
+        try:
+            self.debug('Creating socket to "{address}", port {port}'.format(address=sa[0], port=sa[1]))
+            sock = socket.socket(af, sock_type, proto)
+            sock.settimeout(self.timeout)
+            return sock
+        except socket.error as error:
+            self.debug('Failed to create socket "{address}", port {port}, error: {error}'.format(
+                address=sa[0], port=sa[1], error=error
+            ))
+            return None
+
+    def _connect2socket(self, data, socket_config, sock):
+        """
+        Connect to a socket, passing the result of getaddrinfo()
+        :return: dict
+        """
+
+        af, sock_type, proto, canon_name, sa = socket_config
+        port = str(sa[1])
+        try:
+            self.debug('Connecting socket to "{address}", port {port}'.format(address=sa[0], port=port))
+            start = time()
+            sock.connect(sa)
+            diff = time() - start
+            self.debug('Connected to "{address}", port {port}, latency {latency}'.format(
+                address=sa[0], port=port, latency=diff
+            ))
+            # we will set it at least 0.1 ms. 0.0 would mean failed connection (handy for 3rd-party-APIs)
+            data[PORT_LATENCY] = max(round(diff * 10000), 0)
+            data[PORT_SUCCESS] = 1
+
+        except socket.timeout as error:
+            self.debug('Socket timed out on "{address}", port {port}, error: {error}'.format(
+                address=sa[0], port=port, error=error
+            ))
+            data[PORT_TIMEOUT] = 1
+
+        except socket.error as error:
+            self.debug('Failed to connect to "{address}", port {port}, error: {error}'.format(
+                address=sa[0], port=port, error=error
+            ))
+            data[PORT_FAILED] = 1
+
+    def _disconnect(self, sock):
+        """
+        Close socket connection
+        :return:
+        """
+        if sock is not None:
+            try:
+                self.debug('Closing socket')
+                sock.shutdown(2)  # 0 - read, 1 - write, 2 - all
+                sock.close()
+            except socket.error:
+                pass