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755 <li data-nav-id="/hono/docs/1.3/admin-guide/kura-adapter-config/" title="Kura Adapter Configuration" class="dd-item ">
756 <a href="/hono/docs/1.3/admin-guide/kura-adapter-config/">
757 Kura Adapter Configuration
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760 </li>
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776 <li data-nav-id="/hono/docs/1.3/admin-guide/hono-client-configuration/" title="Hono Client Configuration" class="dd-item ">
777 <a href="/hono/docs/1.3/admin-guide/hono-client-configuration/">
778 Hono Client Configuration
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781 </li>
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798 <a href="/hono/docs/1.3/admin-guide/amqp-network-config/">
799 AMQP 1.0 Messaging Network Configuration
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818 <li data-nav-id="/hono/docs/1.3/admin-guide/secure_communication/" title="Secure Communication" class="dd-item ">
819 <a href="/hono/docs/1.3/admin-guide/secure_communication/">
820 Secure Communication
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839 <li data-nav-id="/hono/docs/1.3/admin-guide/monitoring-tracing-config/" title="Monitoring &amp; Tracing" class="dd-item ">
840 <a href="/hono/docs/1.3/admin-guide/monitoring-tracing-config/">
841 Monitoring &amp; Tracing
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844 </li>
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870 <li data-nav-id="/hono/docs/1.3/dev-guide/" title="Developer Guide" class="dd-item
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875 <a href="/hono/docs/1.3/dev-guide/">
876 <i class="fas fa-tools"></i> Developer Guide
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897 <li data-nav-id="/hono/docs/1.3/dev-guide/building_hono/" title="Building from Source" class="dd-item ">
898 <a href="/hono/docs/1.3/dev-guide/building_hono/">
899 Building from Source
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902 </li>
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919 <a href="/hono/docs/1.3/dev-guide/amqp_adapter_client/">
920 AMQP Adapter Client for Java
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923 </li>
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940 <a href="/hono/docs/1.3/dev-guide/java_client_consumer/">
941 Consuming Messages from Java
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944 </li>
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960 <li data-nav-id="/hono/docs/1.3/dev-guide/custom_http_adapter/" title="Implement a Custom Hono HTTP Protocol Adapter" class="dd-item ">
961 <a href="/hono/docs/1.3/dev-guide/custom_http_adapter/">
962 Implement a Custom Hono HTTP Protocol Adapter
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964 </a>
965 </li>
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973 </ul>
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988 <li data-nav-id="/hono/docs/1.3/api/" title="API" class="dd-item
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993 <a href="/hono/docs/1.3/api/">
994 &nbsp;<i class='fas fa-plug'></i>&nbsp;API
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999 <ul>
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1016 <a href="/hono/docs/1.3/api/telemetry/">
1017 Telemetry API
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1037 <a href="/hono/docs/1.3/api/event/">
1038 Event API
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1058 <a href="/hono/docs/1.3/api/command-and-control/">
1059 Command &amp; Control API
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1079 <a href="/hono/docs/1.3/api/tenant/">
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1100 <a href="/hono/docs/1.3/api/device-connection/">
1101 Device Connection API
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1121 <a href="/hono/docs/1.3/api/device-registration/">
1122 Device Registration API
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1142 <a href="/hono/docs/1.3/api/credentials/">
1143 Credentials API
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1163 <a href="/hono/docs/1.3/api/authentication/">
1164 Authentication API
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1184 <a href="/hono/docs/1.3/api/management/">
1185 Device Registry Management API
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1205 <a href="/hono/docs/1.3/api/metrics/">
1206 Metrics
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1237 <a href="/hono/docs/1.3/deployment/">
1238 <i class="fas fa-shipping-fast"></i> Deployment
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1259 <li data-nav-id="/hono/docs/1.3/deployment/helm-based-deployment/" title="Helm based Deployment" class="dd-item ">
1260 <a href="/hono/docs/1.3/deployment/helm-based-deployment/">
1261 Helm based Deployment
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1281 <a href="/hono/docs/1.3/deployment/openshift/">
1282 OpenShift / OKD
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1302 <a href="/hono/docs/1.3/deployment/create-kubernetes-cluster/">
1303 Setting up a Kubernetes Cluster
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1323 <a href="/hono/docs/1.3/deployment/resource-limitation/">
1324 Limiting Resource Usage
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1356 <i class="fas fa-landmark"></i> Architecture
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1378 <a href="/hono/docs/1.3/architecture/component-view/">
1379 Component View
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1382 </li>
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1399 <a href="/hono/docs/1.3/architecture/auth/">
1400 Authentication/Authorization
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1403 </li>
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1423 <section id="shortcuts">
1424 <h3></h3>
1425 <ul>
1426
1427 <li>
1428 <a class="padding" href="https://www.eclipse.org/hono/" title="Hono&#39;s Homepage"><i class='fas fa-home'></i> Hono Home</a>
1429 </li>
1430
1431 <li>
1432 <a class="padding" href="https://www.eclipse.org/hono/getting-started/" title="Getting started with Eclipse Hono"><i class='fas fa-plane-departure'></i> Getting Started</a>
1433 </li>
1434
1435 </ul>
1436 </section>
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1440 <section id="prefooter">
1441 <hr/>
1442 <ul>
1443
1444 <li>
1445 <div id="select-box-wrapper">
1446 <div id="select-box">
1447 <a class="padding">
1448 Version:&nbsp;
1449 <div class="select-style">
1450 <select id="select-language" onchange="location = this.value;">
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Hono Botd9322632021-01-01 02:10:48 +0000[diff] [blame]1807<p>&copy; 2021 <a href="https://www.eclipse.org/hono/">The Eclipse Hono Project</a></p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1808
1809<p>
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hono Bot01909692020-09-10 21:24:10 -0400[diff] [blame]1833 <div class="old-version-hint">
1834 <p>This page refers to version <em>1.3</em>.
1835 You might want to use the <a href="https://www.eclipse.org/hono/docs/">current stable</a> version.
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1881 <a href='/hono/docs/1.3/'>Documentation</a> > <a href='/hono/docs/1.3/admin-guide/'>Admin Guide</a> > MQTT Adapter Configuration
1882
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Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]1895 <ul>
1896 <li><a href="#service-configuration">Service Configuration</a></li>
1897 <li><a href="#port-configuration">Port Configuration</a>
1898 <ul>
1899 <li><a href="#secure-port-only">Secure Port Only</a></li>
1900 <li><a href="#insecure-port-only">Insecure Port Only</a></li>
1901 <li><a href="#dual-port">Dual Port</a></li>
1902 <li><a href="#ephemeral-ports">Ephemeral Ports</a></li>
1903 </ul>
1904 </li>
1905 <li><a href="#custom-message-mapping">Custom Message Mapping</a></li>
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Hono Botbf26a122021-02-10 02:11:36 +0000[diff] [blame]1921 <h1>
1922
1923 MQTT Adapter Configuration
1924 </h1>
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1929
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]1930<p>The MQTT protocol adapter exposes an MQTT topic hierarchy for Eclipse Hono™&rsquo;s south bound Telemetry, Event and Command &amp; Control APIs.</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1931<p>The adapter is implemented as a Spring Boot application. It can be run either directly from the command line or by means of starting the
1932corresponding <a href="https://hub.docker.com/r/eclipse/hono-adapter-mqtt-vertx/">Docker image</a> created from it.</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1933<p>The adapter supports the following standard configuration options:</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1934<ul>
1935<li><a href="/hono/docs/1.3/admin-guide/common-config/#java-vm-options">Common Java VM Options</a></li>
1936<li><a href="/hono/docs/1.3/admin-guide/common-config/#vert-x-options">Common vert.x Options</a></li>
1937<li><a href="/hono/docs/1.3/admin-guide/common-config/#protocol-adapter-options">Common Protocol Adapter Options</a></li>
1938<li><a href="/hono/docs/1.3/admin-guide/monitoring-tracing-config/">Monitoring Options</a></li>
1939</ul>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1940<h2 id="service-configuration">Service Configuration</h2>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1941<p>The following table provides an overview of the configuration variables and corresponding command line options for configuring the MQTT adapter.</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1942<table>
1943<thead>
1944<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]1945<th style="text-align:left">Environment Variable<br>Command Line Option</th>
1946<th style="text-align:center">Mandatory</th>
1947<th style="text-align:left">Default Value</th>
1948<th style="text-align:left">Description</th>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1949</tr>
1950</thead>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1951<tbody>
1952<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]1953<td style="text-align:left"><code>HONO_APP_MAX_INSTANCES</code><br><code>--hono.app.maxInstances</code></td>
1954<td style="text-align:center">no</td>
1955<td style="text-align:left"><em>#CPU cores</em></td>
1956<td style="text-align:left">The number of verticle instances to deploy. If not set, one verticle per processor core is deployed.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1957</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1958<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]1959<td style="text-align:left"><code>HONO_CONNECTION_EVENTS_PRODUCER</code><br><code>--hono.connectionEvents.producer</code></td>
1960<td style="text-align:center">no</td>
1961<td style="text-align:left"><code>logging</code></td>
1962<td style="text-align:left">The implementation of <em>connection events</em> producer which is to be used. This may be <code>logging</code> or <code>events</code>.<br>See <a href="/hono/docs/1.3/concepts/connection-events/">Connection Events</a></td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1963</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1964<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]1965<td style="text-align:left"><code>HONO_MQTT_AUTHENTICATION_REQUIRED</code><br><code>--hono.mqtt.authenticationRequired</code></td>
1966<td style="text-align:center">no</td>
1967<td style="text-align:left"><code>true</code></td>
1968<td style="text-align:left">If set to <code>true</code> the protocol adapter requires devices to authenticate when connecting to the adapter. The credentials provided by the device are verified using the configured <a href="#credentials-service-connection-configuration">Credentials Service</a>. Devices that have failed to authenticate are not allowed to publish any data.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1969</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1970<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]1971<td style="text-align:left"><code>HONO_MQTT_BIND_ADDRESS</code><br><code>--hono.mqtt.bindAddress</code></td>
1972<td style="text-align:center">no</td>
1973<td style="text-align:left"><code>127.0.0.1</code></td>
1974<td style="text-align:left">The IP address of the network interface that the secure port should be bound to.<br>See <a href="#port-configuration">Port Configuration</a> below for details.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1975</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1976<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]1977<td style="text-align:left"><code>HONO_MQTT_CERT_PATH</code><br><code>--hono.mqtt.certPath</code></td>
1978<td style="text-align:center">no</td>
1979<td style="text-align:left">-</td>
1980<td style="text-align:left">The absolute path to the PEM file containing the certificate that the protocol adapter should use for authenticating to clients. This option must be used in conjunction with <code>HONO_MQTT_KEY_PATH</code>.<br>Alternatively, the <code>HONO_MQTT_KEY_STORE_PATH</code> option can be used to configure a key store containing both the key as well as the certificate.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1981</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1982<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]1983<td style="text-align:left"><code>HONO_MQTT_COMMAND_ACK_TIMEOUT</code><br><code>--hono.mqtt.commandAckTimeout</code></td>
1984<td style="text-align:center">no</td>
1985<td style="text-align:left"><code>100</code></td>
1986<td style="text-align:left">Deprecated. Use <code>HONO_MQTT_SEND_MESSAGE_TO_DEVICE_TIMEOUT</code> instead. The amount of time (milliseconds) after which the sending of a command to a device using QoS 1 is considered to be failed. The value of this variable should be increased in cases where devices are connected over a network with high latency.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1987</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1988<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]1989<td style="text-align:left"><code>HONO_MQTT_SEND_MESSAGE_TO_DEVICE_TIMEOUT</code><br><code>--hono.mqtt.sendMessageToDeviceTimeout</code></td>
1990<td style="text-align:center">no</td>
1991<td style="text-align:left"><code>1000</code></td>
1992<td style="text-align:left">The amount of time (milliseconds) after which the sending of a command to a device using QoS 1 is considered to be failed. The value of this variable should be increased in cases where devices are connected over a network with high latency.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1993</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1994<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]1995<td style="text-align:left"><code>HONO_MQTT_DEFAULTS_ENABLED</code><br><code>--hono.mqtt.defaultsEnabled</code></td>
1996<td style="text-align:center">no</td>
1997<td style="text-align:left"><code>true</code></td>
1998<td style="text-align:left">If set to <code>true</code> the protocol adapter uses <em>default values</em> registered for a device to augment messages published by the device with missing information like a content type. In particular, the protocol adapter adds default values registered for the device as (application) properties with the same name to the AMQP 1.0 messages it sends downstream to the AMQP Messaging Network.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]1999</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2000<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2001<td style="text-align:left"><code>HONO_MQTT_INSECURE_PORT_BIND_ADDRESS</code><br><code>--hono.mqtt.insecurePortBindAddress</code></td>
2002<td style="text-align:center">no</td>
2003<td style="text-align:left"><code>127.0.0.1</code></td>
2004<td style="text-align:left">The IP address of the network interface that the insecure port should be bound to.<br>See <a href="#port-configuration">Port Configuration</a> below for details.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2005</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2006<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2007<td style="text-align:left"><code>HONO_MQTT_INSECURE_PORT_ENABLED</code><br><code>--hono.mqtt.insecurePortEnabled</code></td>
2008<td style="text-align:center">no</td>
2009<td style="text-align:left"><code>false</code></td>
2010<td style="text-align:left">If set to <code>true</code> the protocol adapter will open an insecure port (not secured by TLS) using either the port number set via <code>HONO_MQTT_INSECURE_PORT</code> or the default MQTT port number (<code>1883</code>) if not set explicitly.<br>See <a href="#port-configuration">Port Configuration</a> below for details.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2011</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2012<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2013<td style="text-align:left"><code>HONO_MQTT_KEY_PATH</code><br><code>--hono.mqtt.keyPath</code></td>
2014<td style="text-align:center">no</td>
2015<td style="text-align:left">-</td>
2016<td style="text-align:left">The absolute path to the (PKCS8) PEM file containing the private key that the protocol adapter should use for authenticating to clients. This option must be used in conjunction with <code>HONO_MQTT_CERT_PATH</code>. Alternatively, the <code>HONO_MQTT_KEY_STORE_PATH</code> option can be used to configure a key store containing both the key as well as the certificate.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2017</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2018<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2019<td style="text-align:left"><code>HONO_MQTT_KEY_STORE_PASSWORD</code><br><code>--hono.mqtt.keyStorePassword</code></td>
2020<td style="text-align:center">no</td>
2021<td style="text-align:left">-</td>
2022<td style="text-align:left">The password required to read the contents of the key store.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2023</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2024<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2025<td style="text-align:left"><code>HONO_MQTT_KEY_STORE_PATH</code><br><code>--hono.mqtt.keyStorePath</code></td>
2026<td style="text-align:center">no</td>
2027<td style="text-align:left">-</td>
2028<td style="text-align:left">The absolute path to the Java key store containing the private key and certificate that the protocol adapter should use for authenticating to clients. Either this option or the <code>HONO_MQTT_KEY_PATH</code> and <code>HONO_MQTT_CERT_PATH</code> options need to be set in order to enable TLS secured connections with clients. The key store format can be either <code>JKS</code> or <code>PKCS12</code> indicated by a <code>.jks</code> or <code>.p12</code> file suffix respectively.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2029</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2030<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2031<td style="text-align:left"><code>HONO_MQTT_SNI</code><br><code>--hono.mqtt.sni</code></td>
2032<td style="text-align:center">no</td>
2033<td style="text-align:left"><code>false</code></td>
2034<td style="text-align:left">Set whether the server supports Server Name Indication. By default, the server will not support SNI and the option is <code>false</code>. However, if set to <code>true</code> then the key store format , <code>HONO_MQTT_KEY_STORE_PATH</code>, should be either <code>JKS</code> or <code>PKCS12</code> indicated by a <code>.jks</code> or <code>.p12</code> file suffix respectively.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2035</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2036<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2037<td style="text-align:left"><code>HONO_MQTT_MAX_CONNECTIONS</code><br><code>--hono.mqtt.maxConnections</code></td>
2038<td style="text-align:center">no</td>
2039<td style="text-align:left"><code>0</code></td>
2040<td style="text-align:left">The maximum number of concurrent connections that the protocol adapter should accept. If not set (or set to <code>0</code>), the protocol adapter determines a reasonable value based on the available resources like memory and CPU.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2041</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2042<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2043<td style="text-align:left"><code>HONO_MQTT_MAX_PAYLOAD_SIZE</code><br><code>--hono.mqtt.maxPayloadSize</code></td>
2044<td style="text-align:center">no</td>
2045<td style="text-align:left"><code>2048</code></td>
2046<td style="text-align:left">The maximum allowed size of an incoming MQTT message&rsquo;s payload in bytes. When a client sends a message with a larger payload, the message is discarded and the connection to the client gets closed.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2047</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2048<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2049<td style="text-align:left"><code>HONO_MQTT_NATIVE_TLS_REQUIRED</code><br><code>--hono.mqtt.nativeTlsRequired</code></td>
2050<td style="text-align:center">no</td>
2051<td style="text-align:left"><code>false</code></td>
2052<td style="text-align:left">The server will probe for OpenSLL on startup if a secure port is configured. By default, the server will fall back to the JVM&rsquo;s default SSL engine if not available. However, if set to <code>true</code>, the server will fail to start at all in this case.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2053</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2054<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2055<td style="text-align:left"><code>HONO_MQTT_PORT</code><br><code>--hono.mqtt.port</code></td>
2056<td style="text-align:center">no</td>
2057<td style="text-align:left"><code>8883</code></td>
2058<td style="text-align:left">The secure port that the protocol adapter should listen on.<br>See <a href="#port-configuration">Port Configuration</a> below for details.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2059</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2060<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2061<td style="text-align:left"><code>HONO_MQTT_SECURE_PROTOCOLS</code><br><code>--hono.mqtt.secureProtocols</code></td>
2062<td style="text-align:center">no</td>
2063<td style="text-align:left"><code>TLSv1.2</code></td>
2064<td style="text-align:left">A (comma separated) list of secure protocols that are supported when negotiating TLS sessions. Please refer to the <a href="https://vertx.io/docs/vertx-core/java/#ssl">vert.x documentation</a> for a list of supported protocol names.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2065</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2066<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2067<td style="text-align:left"><code>HONO_MQTT_TENANT_IDLE_TIMEOUT</code><br><code>--hono.mqtt.tenantIdleTimeout</code></td>
2068<td style="text-align:center">no</td>
2069<td style="text-align:left"><code>0ms</code></td>
2070<td style="text-align:left">The duration after which the protocol adapter removes local state of the tenant (e.g. open AMQP links) with an amount and a unit, e.g. <code>2h</code> for 2 hours. See the <a href="https://docs.spring.io/spring-boot/docs/current/reference/html/spring-boot-features.html#boot-features-external-config-conversion-duration">Spring Boot documentation</a> for an explanation of the format. The value <code>0ms</code> disables the timeout.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2071</tr>
2072</tbody>
2073</table>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2074<p>The variables only need to be set if the default values do not match your environment.</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2075<h2 id="port-configuration">Port Configuration</h2>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2076<p>The MQTT protocol adapter can be configured to listen for connections on</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2077<ul>
2078<li>a secure port only (default) or</li>
2079<li>an insecure port only or</li>
2080<li>both a secure and an insecure port (dual port configuration)</li>
2081</ul>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2082<p>The MQTT protocol adapter will fail to start if none of the ports is configured properly.</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2083<h3 id="secure-port-only">Secure Port Only</h3>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2084<p>The protocol adapter needs to be configured with a private key and certificate in order to open a TLS secured port.</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2085<p>There are two alternative ways for doing so:</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2086<ol>
2087<li>either setting the <code>HONO_MQTT_KEY_STORE_PATH</code> and the <code>HONO_MQTT_KEY_STORE_PASSWORD</code> variables in order to load the key &amp; certificate from a password protected key store, or</li>
2088<li>setting the <code>HONO_MQTT_KEY_PATH</code> and <code>HONO_MQTT_CERT_PATH</code> variables in order to load the key and certificate from two separate PEM files in PKCS8 format.</li>
2089</ol>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2090<p>When starting up, the protocol adapter will bind a TLS secured socket to the default secure MQTT port 8883. The port number can also be set explicitly using the <code>HONO_MQTT_PORT</code> variable.</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2091<p>The <code>HONO_MQTT_BIND_ADDRESS</code> variable can be used to specify the network interface that the port should be exposed on. By default the port is bound to the <em>loopback device</em> only, i.e. the port will only be accessible from the local host. Setting this variable to <code>0.0.0.0</code> will let the port being bound to <strong>all</strong> network interfaces (be careful not to expose the port unintentionally to the outside world).</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2092<h3 id="insecure-port-only">Insecure Port Only</h3>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2093<p>The secure port will mostly be required for production scenarios. However, it might be desirable to expose a non-TLS secured port instead, e.g. for testing purposes. In any case, the non-secure port needs to be explicitly enabled either by</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2094<ul>
2095<li>explicitly setting <code>HONO_MQTT_INSECURE_PORT</code> to a valid port number, or by</li>
2096<li>implicitly configuring the default MQTT port (1883) by simply setting <code>HONO_MQTT_INSECURE_PORT_ENABLED</code> to <code>true</code>.</li>
2097</ul>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2098<p>The protocol adapter issues a warning on the console if <code>HONO_MQTT_INSECURE_PORT</code> is set to the default secure MQTT port (8883).</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2099<p>The <code>HONO_MQTT_INSECURE_PORT_BIND_ADDRESS</code> variable can be used to specify the network interface that the port should be exposed on. By default the port is bound to the <em>loopback device</em> only, i.e. the port will only be accessible from the local host. This variable might be used to e.g. expose the non-TLS secured port on a local interface only, thus providing easy access from within the local network, while still requiring encrypted communication when accessed from the outside over public network infrastructure.</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2100<p>Setting this variable to <code>0.0.0.0</code> will let the port being bound to <strong>all</strong> network interfaces (be careful not to expose the port unintentionally to the outside world).</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2101<h3 id="dual-port">Dual Port</h3>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2102<p>The protocol adapter may be configured to open both a secure and a non-secure port at the same time simply by configuring both ports as described above. For this to work, both ports must be configured to use different port numbers, otherwise startup will fail.</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2103<h3 id="ephemeral-ports">Ephemeral Ports</h3>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2104<p>Both the secure as well as the insecure port numbers may be explicitly set to <code>0</code>. The protocol adapter will then use arbitrary (unused) port numbers determined by the operating system during startup.</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2105<h2 id="custom-message-mapping">Custom Message Mapping</h2>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2106<p>This protocol adapter supports transformation of messages that have been uploaded by devices before forwarding them to downstream consumers.</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2107<div class="alert alert-notice">
2108 <h4 class="alert-heading"><i class="fas fa-info-circle"></i> Experimental</h4>
2109 <div>This is an experimental feature. The names of the configuration properties, potential values and the overall functionality are therefore
2110subject to change without prior notice.</div>
2111</div>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2112<p>The following table provides an overview of the configuration variables and corresponding command line options for configuring the external
2113service endpoint(s) for transforming messages:</p>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2114<table>
2115<thead>
2116<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2117<th style="text-align:left">Environment Variable<br>Command Line Option</th>
2118<th style="text-align:center">Mandatory</th>
2119<th style="text-align:left">Default Value</th>
2120<th style="text-align:left">Description</th>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2121</tr>
2122</thead>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2123<tbody>
2124<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2125<td style="text-align:left"><code>HONO_MQTT_MAPPERENDPOINTS_&lt;mapperName&gt;_HOST</code><br><code>--hono.mqtt.mapperEndpoints.&lt;mapperName&gt;.host</code></td>
2126<td style="text-align:center">no</td>
2127<td style="text-align:left">-</td>
2128<td style="text-align:left">The host name or IP address of the service to invoke for transforming uploaded messages. The <code>&lt;mapperName&gt;</code> needs to contain the service name as set in the <em>mapper</em> property of the device&rsquo;s registration information.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2129</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2130<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2131<td style="text-align:left"><code>HONO_MQTT_MAPPERENDPOINTS_&lt;mapperName&gt;_PORT</code><br><code>--hono.mqtt.mapperEndpoints.&lt;mapperName&gt;.port</code></td>
2132<td style="text-align:center">no</td>
2133<td style="text-align:left">-</td>
2134<td style="text-align:left">The port of the service to invoke for transforming uploaded messages. The <code>&lt;mapperName&gt;</code> needs to contain the service name as set in the <em>mapper</em> property of the device&rsquo;s registration information.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2135</tr>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2136<tr>
Hono Botef930712021-04-08 01:12:09 +0000[diff] [blame]2137<td style="text-align:left"><code>HONO_MQTT_MAPPERENDPOINTS_&lt;mapperName&gt;_URI</code><br><code>--hono.mqtt.mapperEndpoints.&lt;mapperName&gt;.uri</code></td>
2138<td style="text-align:center">no</td>
2139<td style="text-align:left">-</td>
2140<td style="text-align:left">The URI of the service to invoke for transforming uploaded messages. The <code>&lt;mapperName&gt;</code> needs to contain the service name as set in the <em>mapper</em> property of the device&rsquo;s registration information.</td>
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2141</tr>
2142</tbody>
2143</table>
2144
Hono Botbf26a122021-02-10 02:11:36 +0000[diff] [blame]2145<footer class="footline">
hono Bot132f6bf2020-08-03 21:23:53 -0400[diff] [blame]2146
2147</footer>
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