From 9b6c6b90485cf4c86d8e6a3eeae6ffba7566789f Mon Sep 17 00:00:00 2001
From: Holger Brunn <hbrunn@therp.nl>
Date: Sat, 21 Nov 2015 02:22:39 +0100
Subject: [PATCH] [ADD] dead_mans_switch_client, dead_mans_switch_server

---
 dead_mans_switch_client/README.rst            |  73 +++++++++
 dead_mans_switch_client/__init__.py           |   4 +
 dead_mans_switch_client/__openerp__.py        |  18 +++
 dead_mans_switch_client/data/ir_actions.xml   |  13 ++
 dead_mans_switch_client/data/ir_cron.xml      |  13 ++
 dead_mans_switch_client/models/__init__.py    |   4 +
 .../models/dead_mans_switch_client.py         |  68 +++++++++
 .../static/description/icon.png               | Bin 0 -> 9455 bytes
 dead_mans_switch_client/tests/__init__.py     |   4 +
 .../tests/test_dead_mans_switch_client.py     |  17 +++
 dead_mans_switch_server/README.rst            |  93 ++++++++++++
 dead_mans_switch_server/__init__.py           |   5 +
 dead_mans_switch_server/__openerp__.py        |  23 +++
 .../controllers/__init__.py                   |   4 +
 dead_mans_switch_server/controllers/main.py   |  28 ++++
 dead_mans_switch_server/data/ir_cron.xml      |  13 ++
 dead_mans_switch_server/models/__init__.py    |   5 +
 .../models/dead_mans_switch_instance.py       | 141 ++++++++++++++++++
 .../models/dead_mans_switch_log.py            |  17 +++
 .../security/ir.model.access.csv              |   4 +
 .../security/res_groups.xml                   |  14 ++
 .../static/description/icon.png               | Bin 0 -> 9455 bytes
 dead_mans_switch_server/tests/__init__.py     |   4 +
 .../tests/test_dead_mans_switch_server.py     |  36 +++++
 .../views/dead_mans_switch_instance.xml       | 117 +++++++++++++++
 .../views/dead_mans_switch_log.xml            |  38 +++++
 dead_mans_switch_server/views/menu.xml        |  16 ++
 27 files changed, 772 insertions(+)
 create mode 100644 dead_mans_switch_client/README.rst
 create mode 100644 dead_mans_switch_client/__init__.py
 create mode 100644 dead_mans_switch_client/__openerp__.py
 create mode 100644 dead_mans_switch_client/data/ir_actions.xml
 create mode 100644 dead_mans_switch_client/data/ir_cron.xml
 create mode 100644 dead_mans_switch_client/models/__init__.py
 create mode 100644 dead_mans_switch_client/models/dead_mans_switch_client.py
 create mode 100644 dead_mans_switch_client/static/description/icon.png
 create mode 100644 dead_mans_switch_client/tests/__init__.py
 create mode 100644 dead_mans_switch_client/tests/test_dead_mans_switch_client.py
 create mode 100644 dead_mans_switch_server/README.rst
 create mode 100644 dead_mans_switch_server/__init__.py
 create mode 100644 dead_mans_switch_server/__openerp__.py
 create mode 100644 dead_mans_switch_server/controllers/__init__.py
 create mode 100644 dead_mans_switch_server/controllers/main.py
 create mode 100644 dead_mans_switch_server/data/ir_cron.xml
 create mode 100644 dead_mans_switch_server/models/__init__.py
 create mode 100644 dead_mans_switch_server/models/dead_mans_switch_instance.py
 create mode 100644 dead_mans_switch_server/models/dead_mans_switch_log.py
 create mode 100644 dead_mans_switch_server/security/ir.model.access.csv
 create mode 100644 dead_mans_switch_server/security/res_groups.xml
 create mode 100644 dead_mans_switch_server/static/description/icon.png
 create mode 100644 dead_mans_switch_server/tests/__init__.py
 create mode 100644 dead_mans_switch_server/tests/test_dead_mans_switch_server.py
 create mode 100644 dead_mans_switch_server/views/dead_mans_switch_instance.xml
 create mode 100644 dead_mans_switch_server/views/dead_mans_switch_log.xml
 create mode 100644 dead_mans_switch_server/views/menu.xml

diff --git a/dead_mans_switch_client/README.rst b/dead_mans_switch_client/README.rst
new file mode 100644
index 000000000..919703c8b
--- /dev/null
+++ b/dead_mans_switch_client/README.rst
@@ -0,0 +1,73 @@
+.. image:: https://img.shields.io/badge/licence-AGPL--3-blue.svg
+    :alt: License: AGPL-3
+
+==========================
+Dead man's switch (client)
+==========================
+
+This module is the client part of `dead_mans_switch_server`. It is responsible
+of sending the server status updates, which in turn takes action if those
+updates don't come in time.
+
+Configuration
+=============
+
+After installing this module, you need to fill in the system parameter
+`dead_mans_switch_client.url`. This must be the full URL to the server's
+controller, usually of the form https://your.server/dead_mans_switch/alive
+
+This module attempts to send CPU and RAM statistics to the server. While this
+is not mandatory, it's helpful for assessing a server's health. If you want
+this, you need to install `psutil`.
+
+You can also have the currently online users logged, but this only works if
+the `im_chat` module is installed.
+
+Usage
+=====
+
+This module doesn't have any visible effect on the client.
+
+.. image:: https://odoo-community.org/website/image/ir.attachment/5784_f2813bd/datas
+    :alt: Try me on Runbot
+    :target: https://runbot.odoo-community.org/runbot/149/8.0
+
+For further information, please visit:
+
+* https://www.odoo.com/forum/help-1
+
+Known issues / Roadmap
+======================
+
+* certificate pinning would be nice
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/server-tools/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us smashing it by providing a detailed and welcomed feedback
+`here <https://github.com/OCA/server-tools/issues/new?body=module:%20dead_mans_switch_client%0Aversion:%208.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Credits
+=======
+
+Contributors
+------------
+
+* Holger Brunn <hbrunn@therp.nl>
+
+Maintainer
+----------
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+This module is maintained by the OCA.
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+To contribute to this module, please visit http://odoo-community.org.
diff --git a/dead_mans_switch_client/__init__.py b/dead_mans_switch_client/__init__.py
new file mode 100644
index 000000000..915f58d4d
--- /dev/null
+++ b/dead_mans_switch_client/__init__.py
@@ -0,0 +1,4 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from . import models
diff --git a/dead_mans_switch_client/__openerp__.py b/dead_mans_switch_client/__openerp__.py
new file mode 100644
index 000000000..7ce4d2b7c
--- /dev/null
+++ b/dead_mans_switch_client/__openerp__.py
@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+{
+    "name": "Dead man's switch (client)",
+    "version": "8.0.1.0.0",
+    "author": "Therp BV,Odoo Community Association (OCA)",
+    "license": "AGPL-3",
+    "category": "Monitoring",
+    "summary": "Be notified when customers' odoo instances go down",
+    "depends": [
+        'base',
+    ],
+    "data": [
+        "data/ir_actions.xml",
+        "data/ir_cron.xml",
+    ],
+}
diff --git a/dead_mans_switch_client/data/ir_actions.xml b/dead_mans_switch_client/data/ir_actions.xml
new file mode 100644
index 000000000..5728882a5
--- /dev/null
+++ b/dead_mans_switch_client/data/ir_actions.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+    <data>
+        <act_window id="action_setup" res_model="ir.config_parameter"
+            name="Configure the dead man's switch server" view_mode="form"
+            context="{'default_key': 'dead_mans_switch_client.url'}"/>
+        <record id="todo_setup" model="ir.actions.todo">
+            <field name="name">Configure the dead man's switch server</field>
+            <field name="type">automatic</field>
+            <field name="action_id" ref="action_setup" />
+        </record>
+    </data>
+</openerp>
diff --git a/dead_mans_switch_client/data/ir_cron.xml b/dead_mans_switch_client/data/ir_cron.xml
new file mode 100644
index 000000000..fe786326d
--- /dev/null
+++ b/dead_mans_switch_client/data/ir_cron.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+    <data noupdate="1">
+        <record id="cron_client" model="ir.cron">
+            <field name="name">Dead man&apos;s switch client</field>
+            <field name="interval_number">5</field>
+            <field name="interval_type">minutes</field>
+            <field name="numbercall">-1</field>
+            <field name="model">dead.mans.switch.client</field>
+            <field name="function">alive</field>
+        </record>
+    </data>
+</openerp>
diff --git a/dead_mans_switch_client/models/__init__.py b/dead_mans_switch_client/models/__init__.py
new file mode 100644
index 000000000..a1f543c73
--- /dev/null
+++ b/dead_mans_switch_client/models/__init__.py
@@ -0,0 +1,4 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from . import dead_mans_switch_client
diff --git a/dead_mans_switch_client/models/dead_mans_switch_client.py b/dead_mans_switch_client/models/dead_mans_switch_client.py
new file mode 100644
index 000000000..995773bfd
--- /dev/null
+++ b/dead_mans_switch_client/models/dead_mans_switch_client.py
@@ -0,0 +1,68 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+import json
+import logging
+import os
+try:
+    import psutil
+except ImportError:
+    psutil = None
+import urllib2
+from openerp import api, models
+
+
+class DeadMansSwitchClient(models.AbstractModel):
+    _name = 'dead.mans.switch.client'
+    _register = True
+
+    @api.model
+    def _get_data(self):
+        ram = 0
+        cpu = 0
+        if psutil:
+            process = psutil.Process(os.getpid())
+            # psutil changed its api through versions
+            if process.parent:
+                if hasattr(process.parent, '__call__'):
+                    process = process.parent()
+                else:
+                    process = process.parent
+            if hasattr(process, 'memory_percent'):
+                ram = process.memory_percent()
+            if hasattr(process, 'cpu_percent'):
+                cpu = process.cpu_percent()
+        user_count = 0
+        if 'im_chat.presence' in self.env.registry:
+            user_count = len(self.env['im_chat.presence'].search([
+                ('status', '!=', 'offline'),
+            ]))
+        return {
+            'database_uuid': self.env['ir.config_parameter'].get_param(
+                'database.uuid'),
+            'cpu': cpu,
+            'ram': ram,
+            'user_count': user_count,
+        }
+
+    @api.model
+    def alive(self):
+        url = self.env['ir.config_parameter'].get_param(
+            'dead_mans_switch_client.url')
+        logger = logging.getLogger(__name__)
+        if not url:
+            logger.error('No server configured!')
+            return
+        data = self._get_data()
+        logger.debug('sending %s', data)
+        urllib2.urlopen(
+            urllib2.Request(
+                url,
+                json.dumps({
+                    'jsonrpc': '2.0',
+                    'method': 'call',
+                    'params': data,
+                }),
+                {
+                    'Content-Type': 'application/json',
+                }))
diff --git a/dead_mans_switch_client/static/description/icon.png b/dead_mans_switch_client/static/description/icon.png
new file mode 100644
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diff --git a/dead_mans_switch_client/tests/__init__.py b/dead_mans_switch_client/tests/__init__.py
new file mode 100644
index 000000000..ef8314b78
--- /dev/null
+++ b/dead_mans_switch_client/tests/__init__.py
@@ -0,0 +1,4 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from . import test_dead_mans_switch_client
diff --git a/dead_mans_switch_client/tests/test_dead_mans_switch_client.py b/dead_mans_switch_client/tests/test_dead_mans_switch_client.py
new file mode 100644
index 000000000..e4d849f93
--- /dev/null
+++ b/dead_mans_switch_client/tests/test_dead_mans_switch_client.py
@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from openerp.tests.common import TransactionCase
+
+
+class TestDeadMansSwitchClient(TransactionCase):
+    def test_dead_mans_switch_client(self):
+        # test unconfigured case
+        self.env['ir.config_parameter'].search([
+            ('key', '=', 'dead_mans_switch_client.url')]).unlink()
+        self.env['dead.mans.switch.client'].alive()
+        # test configured case
+        self.env['ir.config_parameter'].set_param(
+            'dead_mans_switch_client.url', 'fake_url')
+        with self.assertRaises(ValueError):
+            self.env['dead.mans.switch.client'].alive()
diff --git a/dead_mans_switch_server/README.rst b/dead_mans_switch_server/README.rst
new file mode 100644
index 000000000..707c82670
--- /dev/null
+++ b/dead_mans_switch_server/README.rst
@@ -0,0 +1,93 @@
+.. image:: https://img.shields.io/badge/licence-AGPL--3-blue.svg
+    :alt: License: AGPL-3
+
+==========================
+Dead man's switch (server)
+==========================
+
+This module receives status messages by `dead_mans_switch_client` and notifies
+you if a client instance didn't check back in time.
+
+As a side effect, you'll also get some statistical data from your client
+instances.
+
+Usage
+=====
+
+Install `dead_mans_switch_client` on a customer instance and configure it as
+described in that module's documentation. The clients will register themselves
+with the server automatically. They will show up with their database uuid,
+you'll have to assign a human readable description yourself.
+
+At this point, you can assign a customer to this client instance for reporting
+purposes, and, more important, add followers to the instance. They will be
+notified in case the instance doesn't check back in time. Notification are only
+turned on for instances in state 'active', instances in states 'new' or
+'suspended' will be ignored.
+
+You'll find the instances' current state at Reporting/Customer instances.
+
+.. image:: https://odoo-community.org/website/image/ir.attachment/5784_f2813bd/datas
+    :alt: Try me on Runbot
+    :target: https://runbot.odoo-community.org/runbot/149/8.0
+
+For further information, please visit:
+
+* https://www.odoo.com/forum/help-1
+
+Security considerations
+=======================
+
+As the controller receiving status updates is unauthenticated, any internet user
+can have your server create monitoring instance records. While this is annoying,
+it's quite harmless and basically the same as misuse of the fetchmail module.
+
+For a more substantial annoyance, the attacker would have to guess one of your
+client's database uuids, so they functionally are your passwords.
+
+To be sure, consider blocking this controller from unknown origins in your SSL
+proxy. In nginx, it would look like this::
+
+    location /dead_mans_switch/alive {
+    allow   192.168.1.0/24;
+    # add other client's IPs
+    deny    all;
+    }
+
+Known issues / Roadmap
+======================
+
+* matching is done via the database's uuid, so take care to change this if you
+  clone a database
+* logging some postgres stats and disk usage would be nice too
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/server-tools/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us smashing it by providing a detailed and welcomed feedback
+`here <https://github.com/OCA/server-tools/issues/new?body=module:%20dead_mans_switch_server%0Aversion:%208.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Credits
+=======
+
+Contributors
+------------
+
+* Holger Brunn <hbrunn@therp.nl>
+
+Maintainer
+----------
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+This module is maintained by the OCA.
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+To contribute to this module, please visit http://odoo-community.org.
diff --git a/dead_mans_switch_server/__init__.py b/dead_mans_switch_server/__init__.py
new file mode 100644
index 000000000..3d041c2e2
--- /dev/null
+++ b/dead_mans_switch_server/__init__.py
@@ -0,0 +1,5 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from . import models
+from . import controllers
diff --git a/dead_mans_switch_server/__openerp__.py b/dead_mans_switch_server/__openerp__.py
new file mode 100644
index 000000000..10cbdbc25
--- /dev/null
+++ b/dead_mans_switch_server/__openerp__.py
@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+{
+    "name": "Dead man's switch (server)",
+    "version": "8.0.1.0.0",
+    "author": "Therp BV,Odoo Community Association (OCA)",
+    "license": "AGPL-3",
+    "category": "Monitoring",
+    "summary": "Be notified when customers' odoo instances go down",
+    "depends": [
+        'mail',
+        'web_kanban_sparkline',
+    ],
+    "data": [
+        "data/ir_cron.xml",
+        "security/res_groups.xml",
+        "views/dead_mans_switch_log.xml",
+        "views/dead_mans_switch_instance.xml",
+        "views/menu.xml",
+        'security/ir.model.access.csv',
+    ],
+}
diff --git a/dead_mans_switch_server/controllers/__init__.py b/dead_mans_switch_server/controllers/__init__.py
new file mode 100644
index 000000000..004088bc7
--- /dev/null
+++ b/dead_mans_switch_server/controllers/__init__.py
@@ -0,0 +1,4 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from . import main
diff --git a/dead_mans_switch_server/controllers/main.py b/dead_mans_switch_server/controllers/main.py
new file mode 100644
index 000000000..fb70c9939
--- /dev/null
+++ b/dead_mans_switch_server/controllers/main.py
@@ -0,0 +1,28 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+import werkzeug
+from openerp import http
+from openerp.http import request
+
+
+class Main(http.Controller):
+    @http.route('/dead_mans_switch/alive', type='json', auth="none")
+    def alive(self, **kwargs):
+        if 'database_uuid' not in kwargs:
+            raise werkzeug.exceptions.NotFound()
+        instance = request.env['dead.mans.switch.instance'].sudo().search([
+            ('database_uuid', '=', kwargs['database_uuid']),
+        ])
+        if not instance:
+            instance = request.env['dead.mans.switch.instance'].sudo().create({
+                'database_uuid': kwargs['database_uuid'],
+            })
+        data = {
+            field: value
+            for field, value in kwargs.iteritems()
+            if field in request.env['dead.mans.switch.log']._fields
+        }
+        instance.write({
+            'log_ids': [(0, 0, data)],
+        })
diff --git a/dead_mans_switch_server/data/ir_cron.xml b/dead_mans_switch_server/data/ir_cron.xml
new file mode 100644
index 000000000..2505094aa
--- /dev/null
+++ b/dead_mans_switch_server/data/ir_cron.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+    <data noupdate="1">
+        <record id="cron_server" model="ir.cron">
+            <field name="name">Dead man&apos;s switch server</field>
+            <field name="interval_number">1</field>
+            <field name="interval_type">minutes</field>
+            <field name="numbercall">-1</field>
+            <field name="model">dead.mans.switch.instance</field>
+            <field name="function">check_alive</field>
+        </record>
+    </data>
+</openerp>
diff --git a/dead_mans_switch_server/models/__init__.py b/dead_mans_switch_server/models/__init__.py
new file mode 100644
index 000000000..edb51c8c9
--- /dev/null
+++ b/dead_mans_switch_server/models/__init__.py
@@ -0,0 +1,5 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from . import dead_mans_switch_instance
+from . import dead_mans_switch_log
diff --git a/dead_mans_switch_server/models/dead_mans_switch_instance.py b/dead_mans_switch_server/models/dead_mans_switch_instance.py
new file mode 100644
index 000000000..c05f6ff45
--- /dev/null
+++ b/dead_mans_switch_server/models/dead_mans_switch_instance.py
@@ -0,0 +1,141 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+import json
+from datetime import datetime, timedelta
+from openerp import _, api, fields, models
+
+
+class DeadMansSwitchInstance(models.Model):
+    _inherit = ['mail.thread']
+    _name = 'dead.mans.switch.instance'
+    _description = 'Instance to monitor'
+    _order = 'state, partner_id'
+    _rec_name = 'partner_id'
+
+    state = fields.Selection(
+        [('new', 'New'), ('active', 'Active'), ('suspended', 'Suspended')],
+        'State', default='new')
+    partner_id = fields.Many2one(
+        'res.partner', 'Customer',
+        domain=[('is_company', '=', True), ('customer', '=', True)])
+    database_uuid = fields.Char('Database id', required=True, readonly=True)
+    user_id = fields.Many2one('res.users', 'Responsible user',
+                              track_visibility='onchange')
+    description = fields.Char('Description')
+    log_ids = fields.One2many(
+        'dead.mans.switch.log', 'instance_id', string='Log lines')
+    alive = fields.Boolean('Alive', compute='_compute_alive')
+    alive_max_delay = fields.Integer(
+        'Alive delay', help='The amount of seconds without notice after which '
+        'the instance is considered dead', default=600)
+    last_seen = fields.Datetime('Last seen', compute='_compute_last_log')
+    last_cpu = fields.Float('CPU', compute='_compute_last_log')
+    last_cpu_sparkline = fields.Text('CPU', compute='_compute_last_log')
+    last_ram = fields.Float('RAM', compute='_compute_last_log')
+    last_ram_sparkline = fields.Text('RAM', compute='_compute_last_log')
+    last_user_count = fields.Integer(
+        'Active users', compute='_compute_last_log')
+    last_user_count_sparkline = fields.Text(
+        'Active users', compute='_compute_last_log')
+
+    _sql_constraints = [
+        ('uuid_unique', 'unique(database_uuid)', 'Database ID must be unique'),
+    ]
+
+    @api.multi
+    def name_get(self):
+        return [
+            (
+                this.id,
+                '%s%s' % (
+                    this.partner_id.name or this.database_uuid,
+                    ' (%s)' % (this.description) if this.description else '',
+                )
+            )
+            for this in self
+        ]
+
+    @api.onchange('partner_id')
+    def _onchange_partner_id(self):
+        if not self.user_id:
+            self.user_id = self.partner_id.user_id
+
+    @api.multi
+    def button_active(self):
+        self.write({'state': 'active'})
+
+    @api.multi
+    def button_suspended(self):
+        self.write({'state': 'suspended'})
+
+    @api.multi
+    def button_logs(self):
+        return {
+            'type': 'ir.actions.act_window',
+            'res_model': 'dead.mans.switch.log',
+            'domain': [('instance_id', 'in', self.ids)],
+            'name': _('Logs'),
+            'view_mode': 'graph,tree,form',
+            'context': {
+                'search_default_this_month': 1,
+            },
+        }
+
+    @api.multi
+    def _compute_alive(self):
+        for this in self:
+            if this.state in ['new', 'suspended']:
+                this.alive = False
+                continue
+            this.alive = bool(
+                self.env['dead.mans.switch.log'].search(
+                    [
+                        ('instance_id', '=', this.id),
+                        ('create_date', '>=', fields.Datetime.to_string(
+                            datetime.utcnow() -
+                            timedelta(seconds=this.alive_max_delay))),
+                    ],
+                    limit=1))
+
+    @api.multi
+    def _compute_last_log(self):
+        for this in self:
+            last_log = self.env['dead.mans.switch.log'].search(
+                [('instance_id', '=', this.id)], limit=12)
+            field_mapping = {
+                'last_seen': 'create_date',
+                'last_cpu': 'cpu',
+                'last_ram': 'ram',
+                'last_user_count': 'user_count',
+            }
+            for field, mapped_field in field_mapping.iteritems():
+                this[field] = last_log[:1][mapped_field]
+            sparkline_fields = ['last_cpu', 'last_ram', 'last_user_count']
+            for field in sparkline_fields:
+                this['%s_sparkline' % field] = json.dumps(
+                    list(reversed(last_log.mapped(lambda log: {
+                        'value': log[field_mapping[field]],
+                        'tooltip': log.create_date,
+                    }))))
+
+    @api.model
+    def check_alive(self):
+        """handle cronjob"""
+        for this in self.search([('state', '=', 'active')]):
+            if this.alive:
+                continue
+            last_post = fields.Datetime.from_string(this.message_last_post)
+            if not last_post or datetime.utcnow() - timedelta(
+                    seconds=this.alive_max_delay * 2) > last_post:
+                this.panic()
+
+    @api.multi
+    def panic(self):
+        """override for custom handling"""
+        self.ensure_one()
+        self.message_post(
+            type='comment', subtype='mt_comment',
+            subject=_('Dead man\'s switch warning: %s') %
+            self.display_name, content_subtype='plaintext',
+            body=_('%s seems to be dead') % self.display_name)
diff --git a/dead_mans_switch_server/models/dead_mans_switch_log.py b/dead_mans_switch_server/models/dead_mans_switch_log.py
new file mode 100644
index 000000000..5c64c387f
--- /dev/null
+++ b/dead_mans_switch_server/models/dead_mans_switch_log.py
@@ -0,0 +1,17 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from openerp import fields, models
+
+
+class DeadMansSwitchLog(models.Model):
+    _name = 'dead.mans.switch.log'
+    _description = 'Instance log line'
+    _order = 'create_date desc'
+    _rec_name = 'create_date'
+
+    instance_id = fields.Many2one(
+        'dead.mans.switch.instance', 'Instance', index=True)
+    cpu = fields.Float('CPU', group_operator='avg')
+    ram = fields.Float('RAM', group_operator='avg')
+    user_count = fields.Integer('Users logged in', group_operator='avg')
diff --git a/dead_mans_switch_server/security/ir.model.access.csv b/dead_mans_switch_server/security/ir.model.access.csv
new file mode 100644
index 000000000..d995b4217
--- /dev/null
+++ b/dead_mans_switch_server/security/ir.model.access.csv
@@ -0,0 +1,4 @@
+"id","name","model_id:id","group_id:id","perm_read","perm_write","perm_create","perm_unlink"
+access_dead_mans_switch_log,access_dead_mans_switch_log,model_dead_mans_switch_log,group_user,1,0,0,0
+access_dead_mans_switch_instance,access_dead_mans_switch_instance,model_dead_mans_switch_instance,group_user,1,0,0,0
+access_dead_mans_switch_instance_manager,access_dead_mans_switch_instance,model_dead_mans_switch_instance,group_manager,1,1,0,1
diff --git a/dead_mans_switch_server/security/res_groups.xml b/dead_mans_switch_server/security/res_groups.xml
new file mode 100644
index 000000000..101ee7520
--- /dev/null
+++ b/dead_mans_switch_server/security/res_groups.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+    <data>
+        <record id="group_user" model="res.groups">
+            <field name="name">User</field>
+            <field name="category_id" ref="base.module_category_monitoring" />
+        </record>
+        <record id="group_manager" model="res.groups">
+            <field name="name">Manager</field>
+            <field name="implied_ids" eval="[(4, ref('group_user'))]" />
+            <field name="category_id" ref="base.module_category_monitoring" />
+        </record>
+    </data>
+</openerp>
diff --git a/dead_mans_switch_server/static/description/icon.png b/dead_mans_switch_server/static/description/icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..3a0328b516c4980e8e44cdb63fd945757ddd132d
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diff --git a/dead_mans_switch_server/tests/__init__.py b/dead_mans_switch_server/tests/__init__.py
new file mode 100644
index 000000000..2af045f7c
--- /dev/null
+++ b/dead_mans_switch_server/tests/__init__.py
@@ -0,0 +1,4 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from . import test_dead_mans_switch_server
diff --git a/dead_mans_switch_server/tests/test_dead_mans_switch_server.py b/dead_mans_switch_server/tests/test_dead_mans_switch_server.py
new file mode 100644
index 000000000..443b7687a
--- /dev/null
+++ b/dead_mans_switch_server/tests/test_dead_mans_switch_server.py
@@ -0,0 +1,36 @@
+# -*- coding: utf-8 -*-
+# © 2015 Therp BV <http://therp.nl>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
+from openerp.tests.common import TransactionCase
+from openerp import http
+from ..controllers.main import Main
+
+
+class TestDeadMansSwitchServer(TransactionCase):
+    def test_dead_mans_switch_server(self):
+        if 'dead.mans.switch.client' not in self.env.registry:
+            return
+        data = self.env['dead.mans.switch.client']._get_data()
+        http._request_stack.push(self)
+        Main().alive(**data)
+        instance = self.env['dead.mans.switch.instance'].search([
+            ('database_uuid', '=', data['database_uuid']),
+        ])
+        self.assertTrue(instance)
+        self.assertTrue(instance.last_seen)
+        self.assertEqual(instance.display_name, data['database_uuid'])
+        main_partner = self.env.ref('base.main_partner')
+        instance.partner_id = main_partner
+        self.assertEqual(instance.display_name, main_partner.name)
+        instance._onchange_partner_id()
+        self.assertEqual(instance.user_id, main_partner.user_id)
+        instance.button_suspended()
+        self.assertEqual(instance.state, 'suspended')
+        instance.button_active()
+        self.assertTrue(instance.alive)
+        message_count = len(instance.message_ids)
+        instance.check_alive()
+        self.assertEqual(len(instance.message_ids), message_count)
+        instance.log_ids.unlink()
+        instance.check_alive()
+        self.assertEqual(len(instance.message_ids), message_count + 1)
diff --git a/dead_mans_switch_server/views/dead_mans_switch_instance.xml b/dead_mans_switch_server/views/dead_mans_switch_instance.xml
new file mode 100644
index 000000000..476a81b9a
--- /dev/null
+++ b/dead_mans_switch_server/views/dead_mans_switch_instance.xml
@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+    <data>
+        <record id="search_dead_mans_switch_instance" model="ir.ui.view">
+            <field name="model">dead.mans.switch.instance</field>
+            <field name="arch" type="xml">
+                <search>
+                    <field name="partner_id" />
+                    <field name="database_uuid" />
+                    <field name="description" />
+                    <group string="State">
+                        <filter name="active" string="Active" domain="[('state', '=', 'active')]" />
+                        <filter name="new" string="New" domain="[('state', '=', 'new')]" />
+                        <filter name="suspended" string="Suspended" domain="[('state', '=', 'suspended')]" />
+                    </group>
+                </search>
+            </field>
+        </record>
+        <record id="form_dead_mans_switch_instance" model="ir.ui.view">
+            <field name="model">dead.mans.switch.instance</field>
+            <field name="arch" type="xml">
+                <form>
+                    <header>
+                        <button type="object" name="button_active"
+                            string="Activate" states="new,suspended"
+                            class="oe_highlight" />
+                        <button type="object" name="button_suspended"
+                            string="Suspend" states="active" />
+                        <field name="state" widget="statusbar" />
+                    </header>
+                    <sheet>
+                        <div class="oe_title">
+                            <h1 class="oe_read_only"><field name="display_name" /></h1>
+                        </div>
+                        <div class="oe_button_box oe_right">
+                            <button type="object" name="button_logs"
+                                string="Open logs" class="oe_stat_button"
+                                icon="fa-tasks" />
+                        </div>
+                        <group>
+                            <group name="description">
+                                <field name="partner_id" />
+                                <field name="description" />
+                            </group>
+                            <group name="data">
+                                <field name="database_uuid" />
+                                <field name="user_id" />
+                            </group>
+                        </group>
+                        <div class="oe_chatter">
+                            <field name="message_follower_ids" widget="mail_followers"/>
+                            <field name="message_ids" widget="mail_thread"/>
+                        </div>
+                    </sheet>
+                </form>
+            </field>
+        </record>
+        <record id="tree_dead_mans_switch_instance" model="ir.ui.view">
+            <field name="model">dead.mans.switch.instance</field>
+            <field name="arch" type="xml">
+                <tree>
+                    <field name="display_name" />
+                    <field name="alive" />
+                    <field name="user_id" />
+                </tree>
+            </field>
+        </record>
+        <record id="kanban_dead_mans_switch_instance" model="ir.ui.view">
+            <field name="model">dead.mans.switch.instance</field>
+            <field name="arch" type="xml">
+                <kanban>
+                    <field name="partner_id" />
+                    <field name="alive" />
+                    <field name="state" />
+                    <templates>
+                        <div t-name="kanban-box" t-attf-class="oe_kanban_card #{widget.kanban_color(record.partner_id.raw_value[0])}">
+                            <h4>
+                                <a type="open"><field name="display_name" /></a>
+                                <t t-if="record.alive.raw_value and record.state.raw_value == 'active'">
+                                    <i class="fa fa-circle" style="color: green" />
+                                </t>
+                                <t t-if="!record.alive.raw_value and record.state.raw_value == 'active'">
+                                    <i class="fa fa-circle" style="color: red" />
+                                </t>
+                                <t t-if="record.state.raw_value != 'active'">
+                                    <i class="fa fa-circle" style="color: gray" />
+                                </t>
+                            </h4>
+                            <table class="table">
+                                <tr>
+                                    <th>CPU</th>
+                                    <td><field name="last_cpu" />%</td>
+                                    <td><field name="last_cpu_sparkline" widget="sparkline_bar" /></td>
+                                </tr>
+                                <tr>
+                                    <th>RAM</th>
+                                    <td><field name="last_ram" />%</td>
+                                    <td><field name="last_ram_sparkline" widget="sparkline_bar" /></td>
+                                </tr>
+                                <tr>
+                                    <th>Users</th>
+                                    <td><field name="last_user_count" /></td>
+                                    <td><field name="last_user_count_sparkline" widget="sparkline_bar" /></td>
+                                </tr>
+                                <tr>
+                                    <th>Last seen</th>
+                                    <td><field name="last_seen" /></td>
+                                    <td />
+                                </tr>
+                            </table>
+                        </div>
+                    </templates>
+                </kanban>
+            </field>
+        </record>
+     </data>
+</openerp>
diff --git a/dead_mans_switch_server/views/dead_mans_switch_log.xml b/dead_mans_switch_server/views/dead_mans_switch_log.xml
new file mode 100644
index 000000000..7df357832
--- /dev/null
+++ b/dead_mans_switch_server/views/dead_mans_switch_log.xml
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+    <data>
+        <record id="tree_dead_mans_switch_log" model="ir.ui.view">
+            <field name="model">dead.mans.switch.log</field>
+            <field name="arch" type="xml">
+                <tree>
+                    <field name="create_date" />
+                    <field name="cpu" />
+                    <field name="ram" />
+                    <field name="user_count" />
+                </tree>
+            </field>
+        </record>
+        <record id="graph_dead_mans_switch_log" model="ir.ui.view">
+            <field name="model">dead.mans.switch.log</field>
+            <field name="arch" type="xml">
+                <graph type="pivot">
+                    <field name="create_date" type="row" interval="day" />
+                    <field name="cpu" type="measure" />
+                    <field name="ram" type="measure" />
+                    <field name="user_count" type="measure" />
+                </graph>
+            </field>
+        </record>
+        <record id="search_dead_mans_switch_log" model="ir.ui.view">
+            <field name="model">dead.mans.switch.log</field>
+            <field name="arch" type="xml">
+                <search>
+                    <filter name="this_month" string="This month"
+                        domain="[('create_date', '>=', (datetime.date.today() - relativedelta(days=31)).strftime('%Y-%m-%d'))]" />
+                    <filter name="this_week" string="This week"
+                        domain="[('create_date', '>=', (datetime.date.today() - relativedelta(days=6)).strftime('%Y-%m-%d'))]" />
+                </search>
+            </field>
+        </record>
+    </data>
+</openerp>
diff --git a/dead_mans_switch_server/views/menu.xml b/dead_mans_switch_server/views/menu.xml
new file mode 100644
index 000000000..8021015a8
--- /dev/null
+++ b/dead_mans_switch_server/views/menu.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<openerp>
+    <data>
+        <act_window id="action_dead_mans_switch_instance"
+            name="Customer instances"
+            res_model="dead.mans.switch.instance"
+            context="{'search_default_active': 1}"
+            view_mode="kanban,tree,form" />
+        <menuitem id="menu_dead_mans_switch"
+            name="Customer instances"
+            parent="base.menu_reporting" />
+        <menuitem id="menu_dead_mans_switch_instance"
+            action="action_dead_mans_switch_instance"
+            parent="menu_dead_mans_switch" />
+    </data>
+</openerp>