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<a title="Shows how to set up role-based access control for services in Istio mesh." href="/v0.8/docs/tasks/security/role-based-access-control/">Role-Based Access Control</a>
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<a title="Shows how operators can configure Citadel with existing root certificate, signing certificate and key." href="/v0.8/docs/tasks/security/plugin-ca-cert/">Plugging in external CA key and certificate</a>
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<a title="Shows how to enable Citadel health checking with Kubernetes." href="/v0.8/docs/tasks/security/health-check/">Citadel health checking</a>
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<a title="Shows how to enable mutual TLS on HTTPS services." href="/v0.8/docs/tasks/security/https-overlay/">Mutual TLS over HTTPS</a>
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<a title="This task shows you how to use Istio to dynamically limit the traffic to a service." href="/v0.8/docs/tasks/policy-enforcement/rate-limiting/">Enabling Rate Limits</a>
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<a title="How to configure the proxies to send tracing requests to Zipkin or Jaeger" href="/v0.8/docs/tasks/telemetry/distributed-tracing/">Distributed Tracing</a>
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<a title="This task shows you how to configure Istio to collect metrics and logs." href="/v0.8/docs/tasks/telemetry/metrics-logs/">Collecting Metrics and Logs</a>
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<span class="current" title="This task shows you how to configure Istio to collect metrics for TCP services.">Collecting Metrics for TCP services</span>
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<a title="This task shows you how to query for Istio Metrics using Prometheus." href="/v0.8/docs/tasks/telemetry/querying-metrics/">Querying Metrics from Prometheus</a>
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<a title="This task shows you how to setup and use the Istio Dashboard to monitor mesh traffic." href="/v0.8/docs/tasks/telemetry/using-istio-dashboard/">Visualizing Metrics with Grafana</a>
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<a title="This task shows you how to generate a graph of services within an Istio mesh." href="/v0.8/docs/tasks/telemetry/servicegraph/">Generating a Service Graph</a>
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<a title="This task shows you how to configure Istio to log to a Fluentd daemon" href="/v0.8/docs/tasks/telemetry/fluentd/">Logging with Fluentd</a>
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<a title="This guide deploys a sample application composed of four separate microservices which will be used to demonstrate various features of the Istio service mesh." href="/v0.8/docs/guides/bookinfo/">Bookinfo Sample Application</a>
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<a title="This guide demonstrates how to use various traffic management capabilities of an Istio service mesh." href="/v0.8/docs/guides/intelligent-routing/">Intelligent Routing</a>
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<a title="This sample demonstrates how to obtain uniform metrics, logs, traces across different services using Istio Mixer and Istio sidecar." href="/v0.8/docs/guides/telemetry/">In-Depth Telemetry</a>
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<a title="Explains how to manually integrate Google Cloud Endpoints services with Istio." href="/v0.8/docs/guides/endpoints/">Install Istio for Google Cloud Endpoints Services</a>
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<a title="This sample deploys the Bookinfo services across Kubernetes and a set of virtual machines, and illustrates how to use the Istio service mesh to control this infrastructure as a single mesh." href="/v0.8/docs/guides/integrating-vms/">Integrating Virtual Machines</a>
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<a title="Performance measurement through code level micro-benchmarks." href="/v0.8/docs/performance-and-scalability/microbenchmarks/">Micro Benchmarks</a>
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<a title="The different scenarios we are tracking for performance and scalability." href="/v0.8/docs/performance-and-scalability/scenarios/">Testing scenarios</a>
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<a title="Fortio is our simple synthetic http and grpc benchmarking tool." href="/v0.8/docs/performance-and-scalability/synthetic-benchmarks/">Synthetic End to End benchmarks</a>
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<a title="Performance measurement through realistic micro service application tests." href="/v0.8/docs/performance-and-scalability/realistic-app-benchmark/">Realistic Application Benchmark</a>
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<a title="How we ensure performance is tracked and improves or does not regress across releases." href="/v0.8/docs/performance-and-scalability/performance-testing-automation/">Automation</a>
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<a title="Setup of Istio components to scale horizontally. High availability. Sizing guide." href="/v0.8/docs/performance-and-scalability/scalability/">Scalability and Sizing Guide</a>
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<a title="Describes how to configure Istio&#39;s policy and telemetry features." href="/v0.8/docs/reference/config/policy-and-telemetry/">Policies and Telemetry </a>
</label>
<ul class="tree collapse">
<li>
<a title="Describes the base attribute vocabulary used for policy and control." href="/v0.8/docs/reference/config/policy-and-telemetry/attribute-vocabulary/">Attribute Vocabulary</a>
</li>
<li>
<a title="Mixer config expression language reference." href="/v0.8/docs/reference/config/policy-and-telemetry/expression-language/">Expression Language</a>
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</label>
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<li>
<a title="Adapter for circonus.com&#39;s monitoring solution." href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/circonus/">Circonus</a>
</li>
<li>
<a title="Adapter for cloudwatch metrics." href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/cloudwatch/">CloudWatch</a>
</li>
<li>
<a title="Adapter to deliver metrics to a dogstatsd agent for delivery to DataDog" href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/datadog/">Datadog</a>
</li>
<li>
<a title="Adapter that always returns a precondition denial." href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/denier/">Denier</a>
</li>
<li>
<a title="Adapter that delivers logs to a fluentd daemon." href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/fluentd/">Fluentd</a>
</li>
<li>
<a title="Adapter that extracts information from a Kubernetes environment." href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/kubernetesenv/">Kubernetes Env</a>
</li>
<li>
<a title="Adapter that performs whitelist or blacklist checks" href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/list/">List</a>
</li>
<li>
<a title="Adapter for a simple in-memory quota management system." href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/memquota/">Memory quota</a>
</li>
<li>
<a title="Adapter that implements an Open Policy Agent engine" href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/opa/">OPA</a>
</li>
<li>
<a title="Adapter that exposes Istio metrics for ingestion by a Prometheus harvester." href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/prometheus/">Prometheus</a>
</li>
<li>
<a title="Adapter that exposes Istio&#39;s Role-Based Access Control model." href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/rbac/">RBAC</a>
</li>
<li>
<a title="Adapter for a Redis-based quota management system." href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/redisquota/">Redis Quota</a>
</li>
<li>
<a title="Adapter that delivers logs and metrics to Google Service Control" href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/servicecontrol/">Service Control</a>
</li>
<li>
<a title="Adapter to deliver logs and metrics to Papertrail and AppOptics backends" href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/solarwinds/">SolarWinds</a>
</li>
<li>
<a title="Adapter to deliver logs and metrics to Stackdriver" href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/stackdriver/">Stackdriver</a>
</li>
<li>
<a title="Adapter to deliver metrics to a StatsD backend" href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/statsd/">StatsD</a>
</li>
<li>
<a title="Adapter for outputting logs and metrics locally." href="/v0.8/docs/reference/config/policy-and-telemetry/adapters/stdio/">Stdio</a>
</li>
</ul>
</li>
<li>
<a title="Default Metrics exported from Istio through Mixer." href="/v0.8/docs/reference/config/policy-and-telemetry/metrics/">Default Metrics</a>
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<a title="A template that represents a single API key." href="/v0.8/docs/reference/config/policy-and-telemetry/templates/apikey/">API Key</a>
</li>
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<a title="A template used to represent an access control query." href="/v0.8/docs/reference/config/policy-and-telemetry/templates/authorization/">Authorization</a>
</li>
<li>
<a title="A template that carries no data, useful for testing." href="/v0.8/docs/reference/config/policy-and-telemetry/templates/checknothing/">Check Nothing</a>
</li>
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<a title="A template that is used to control the production of Kubernetes-specific attributes." href="/v0.8/docs/reference/config/policy-and-telemetry/templates/kubernetes/">Kubernetes</a>
</li>
<li>
<a title="A template designed to let you perform list checking operations." href="/v0.8/docs/reference/config/policy-and-telemetry/templates/listentry/">List Entry</a>
</li>
<li>
<a title="A template that represents a single runtime log entry." href="/v0.8/docs/reference/config/policy-and-telemetry/templates/logentry/">Log Entry</a>
</li>
<li>
<a title="A template that represents a single runtime metric." href="/v0.8/docs/reference/config/policy-and-telemetry/templates/metric/">Metric</a>
</li>
<li>
<a title="A template that represents a quota allocation request" href="/v0.8/docs/reference/config/policy-and-telemetry/templates/quota/">Quota</a>
</li>
<li>
<a title="A template that carries no data, useful for testing." href="/v0.8/docs/reference/config/policy-and-telemetry/templates/reportnothing/">Report Nothing</a>
</li>
<li>
<a title="A template used by the Google Service Control adapter." href="/v0.8/docs/reference/config/policy-and-telemetry/templates/servicecontrolreport/">Service Control Report</a>
</li>
</ul>
</li>
<li>
<a title="Describes the rules used to configure Mixer&#39;s policy and telemetry features." href="/v0.8/docs/reference/config/policy-and-telemetry/istio.policy.v1beta1/">Rules</a>
</li>
</ul>
</li>
<li>
<a title="Configuration for Role Based Access Control" href="/v0.8/docs/reference/config/istio.rbac.v1alpha1/">RBAC</a>
</li>
<li>
<a title="Configuration affecting traffic routing" href="/v0.8/docs/reference/config/istio.routing.v1alpha1/">Route Rules v1alpha1 (deprecated)</a>
</li>
<li>
<a title="Configuration affecting traffic routing" href="/v0.8/docs/reference/config/istio.networking.v1alpha3/">Route Rules v1alpha3</a>
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<a title="Utility to trigger direct calls to Mixer&amp;#39;s API." href="/v0.8/docs/reference/commands/mixc/">mixc</a>
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<a title="Mixer is Istio&amp;#39;s abstraction on top of infrastructure backends." href="/v0.8/docs/reference/commands/mixs/">mixs</a>
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<a title="Istio Pilot" href="/v0.8/docs/reference/commands/pilot-discovery/">pilot-discovery</a>
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<a title="Kubernetes webhook for automatic Istio sidecar injection" href="/v0.8/docs/reference/commands/sidecar-injector/">sidecar-injector</a>
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<h1 id="title">Collecting Metrics for TCP services</h1>
<nav class="toc-inlined d-xl-none d-print-none" >
<div class="directory" role="directory">
<nav id="InlinedTableOfContents">
<ul>
<li><a href="#before-you-begin">Before you begin</a></li>
<li><a href="#collecting-new-telemetry-data">Collecting new telemetry data</a></li>
<li><a href="#understanding-tcp-telemetry-collection">Understanding TCP telemetry collection</a>
<ul>
<li><a href="#tcp-attributes">TCP Attributes</a></li>
</ul>
</li>
<li><a href="#cleanup">Cleanup</a></li>
<li><a href="#whats-next">What's next</a></li>
</ul>
</nav>
</div>
</nav>
<p>This task shows how to configure Istio to automatically gather telemetry for TCP
services in a mesh. At the end of this task, a new metric will be enabled for
calls to a TCP service within your mesh.</p>
<p>The <a href="/v0.8/docs/guides/bookinfo/">Bookinfo</a> sample application is used
as the example application throughout this task.</p>
<h2 id="before-you-begin">Before you begin</h2>
<ul>
<li>
<p><a href="/v0.8/docs/setup/">Install Istio</a> in your cluster and deploy an
application.</p>
</li>
<li>
<p>This task assumes that the Bookinfo sample will be deployed in the <code>default</code>
namespace. If you use a different namespace, you will need to update the
example configuration and commands.</p>
</li>
</ul>
<h2 id="collecting-new-telemetry-data">Collecting new telemetry data</h2>
<ol>
<li>
<p>Create a new YAML file to hold configuration for the new metrics that Istio
will generate and collect automatically.</p>
<p>Save the following as <code>tcp_telemetry.yaml</code>:</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-yaml" data-lang="yaml"> <span style="color:#75715e"># Configuration for a metric measuring bytes sent from a server</span>
<span style="color:#75715e"># to a client</span>
apiVersion: <span style="color:#e6db74">&#34;config.istio.io/v1alpha2&#34;</span>
kind: metric
metadata:
name: mongosentbytes
namespace: default
spec:
value: connection.sent.bytes | <span style="color:#ae81ff">0</span> <span style="color:#75715e"># uses a TCP-specific attribute</span>
dimensions:
source_service: source.service | <span style="color:#e6db74">&#34;unknown&#34;</span>
source_version: source.labels[<span style="color:#e6db74">&#34;version&#34;</span>] | <span style="color:#e6db74">&#34;unknown&#34;</span>
destination_version: destination.labels[<span style="color:#e6db74">&#34;version&#34;</span>] | <span style="color:#e6db74">&#34;unknown&#34;</span>
monitoredResourceType: <span style="color:#e6db74">&#39;&#34;UNSPECIFIED&#34;&#39;</span>
--<span style="color:#e6db74">-
</span><span style="color:#e6db74"> </span><span style="color:#e6db74"> </span><span style="color:#e6db74"># Configuration for a metric measuring bytes sent from a client</span>
<span style="color:#75715e"># to a server</span>
apiVersion: <span style="color:#e6db74">&#34;config.istio.io/v1alpha2&#34;</span>
kind: metric
metadata:
name: mongoreceivedbytes
namespace: default
spec:
value: connection.received.bytes | <span style="color:#ae81ff">0</span> <span style="color:#75715e"># uses a TCP-specific attribute</span>
dimensions:
source_service: source.service | <span style="color:#e6db74">&#34;unknown&#34;</span>
source_version: source.labels[<span style="color:#e6db74">&#34;version&#34;</span>] | <span style="color:#e6db74">&#34;unknown&#34;</span>
destination_version: destination.labels[<span style="color:#e6db74">&#34;version&#34;</span>] | <span style="color:#e6db74">&#34;unknown&#34;</span>
monitoredResourceType: <span style="color:#e6db74">&#39;&#34;UNSPECIFIED&#34;&#39;</span>
--<span style="color:#e6db74">-
</span><span style="color:#e6db74"> </span><span style="color:#e6db74"> </span><span style="color:#e6db74"># Configuration for a Prometheus handler</span>
apiVersion: <span style="color:#e6db74">&#34;config.istio.io/v1alpha2&#34;</span>
kind: prometheus
metadata:
name: mongohandler
namespace: default
spec:
metrics:
- name: mongo_sent_bytes <span style="color:#75715e"># Prometheus metric name</span>
instance_name: mongosentbytes.metric.default <span style="color:#75715e"># Mixer instance name (fully-qualified)</span>
kind: COUNTER
label_names:
- source_service
- source_version
- destination_version
- name: mongo_received_bytes <span style="color:#75715e"># Prometheus metric name</span>
instance_name: mongoreceivedbytes.metric.default <span style="color:#75715e"># Mixer instance name (fully-qualified)</span>
kind: COUNTER
label_names:
- source_service
- source_version
- destination_version
--<span style="color:#e6db74">-
</span><span style="color:#e6db74"> </span><span style="color:#e6db74"> </span><span style="color:#e6db74"># Rule to send metric instances to a Prometheus handler</span>
apiVersion: <span style="color:#e6db74">&#34;config.istio.io/v1alpha2&#34;</span>
kind: rule
metadata:
name: mongoprom
namespace: default
spec:
match: context.protocol == <span style="color:#e6db74">&#34;tcp&#34;</span>
<span style="color:#75715e">&amp;&amp;</span> destination.service == <span style="color:#e6db74">&#34;mongodb.default.svc.cluster.local&#34;</span>
actions:
- handler: mongohandler.prometheus
instances:
- mongoreceivedbytes.metric
- mongosentbytes.metric
</code></pre></div></li>
<li>
<p>Push the new configuration.</p>
<pre><code class="language-command" data-lang="command">$ istioctl create -f tcp_telemetry.yaml
Created config metric/default/mongosentbytes at revision 3852843
Created config metric/default/mongoreceivedbytes at revision 3852844
Created config prometheus/default/mongohandler at revision 3852845
Created config rule/default/mongoprom at revision 3852846
</code></pre></li>
<li>
<p>Setup Bookinfo to use MongoDB.</p>
<ol>
<li>
<p>Install <code>v2</code> of the <code>ratings</code> service.</p>
<p>If you are using a cluster with automatic sidecar injection enabled,
simply deploy the services using <code>kubectl</code>:</p>
<pre><code class="language-command" data-lang="command">$ kubectl apply -f @samples/bookinfo/kube/bookinfo-ratings-v2.yaml@
</code></pre><p>If you are using manual sidecar injection, use the following command instead:</p>
<pre><code class="language-command" data-lang="command">$ kubectl apply -f &lt;(istioctl kube-inject -f @samples/bookinfo/kube/bookinfo-ratings-v2.yaml@)
deployment &quot;ratings-v2&quot; configured
</code></pre></li>
<li>
<p>Install the <code>mongodb</code> service:</p>
<p>If you are using a cluster with automatic sidecar injection enabled,
simply deploy the services using <code>kubectl</code>:</p>
<pre><code class="language-command" data-lang="command">$ kubectl apply -f @samples/bookinfo/kube/bookinfo-db.yaml@
</code></pre><p>If you are using manual sidecar injection, use the following command instead:</p>
<pre><code class="language-command" data-lang="command">$ kubectl apply -f &lt;(istioctl kube-inject -f @samples/bookinfo/kube/bookinfo-db.yaml@)
service &quot;mongodb&quot; configured
deployment &quot;mongodb-v1&quot; configured
</code></pre></li>
<li>
<p>Add routing rules to send traffic to <code>v2</code> of the <code>ratings</code> service:</p>
<pre><code class="language-command" data-lang="command">$ istioctl create -f @samples/bookinfo/kube/route-rule-ratings-db.yaml@
Created config route-rule//ratings-test-v2 at revision 7216403
Created config route-rule//reviews-test-ratings-v2 at revision 7216404
</code></pre></li>
</ol>
</li>
<li>
<p>Send traffic to the sample application.</p>
<p>For the Bookinfo sample, visit <code>http://$GATEWAY_URL/productpage</code> in your web
browser or issue the following command:</p>
<pre><code class="language-command" data-lang="command">$ curl http://$GATEWAY_URL/productpage
</code></pre></li>
<li>
<p>Verify that the new metric values are being generated and collected.</p>
<p>In a Kubernetes environment, setup port-forwarding for Prometheus by
executing the following command:</p>
<pre><code class="language-command" data-lang="command">$ kubectl -n istio-system port-forward $(kubectl -n istio-system get pod -l app=prometheus -o jsonpath='{.items[0].metadata.name}') 9090:9090 &amp;
</code></pre><p>View values for the new metric via the <a href="http://localhost:9090/graph#%5B%7B%22range_input%22%3A%221h%22%2C%22expr%22%3A%22istio_mongo_received_bytes%22%2C%22tab%22%3A1%7D%5D">Prometheus UI</a>.</p>
<p>The provided link opens the Prometheus UI and executes a query for values of
the <code>istio_mongo_received_bytes</code> metric. The table displayed in the
<strong>Console</strong> tab includes entries similar to:</p>
<div class="highlight"><pre style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4"><code class="language-plain" data-lang="plain">istio_mongo_received_bytes{destination_version=&#34;v1&#34;,instance=&#34;istio-mixer.istio-system:42422&#34;,job=&#34;istio-mesh&#34;,source_service=&#34;ratings.default.svc.cluster.local&#34;,source_version=&#34;v2&#34;} 2317
</code></pre></div><blockquote>
<p>Istio also collects protocol-specific statistics for MongoDB. For
example, the value of total OP_QUERY messages sent from the <code>ratings</code> service
is collected in the following metric:
<code>envoy_mongo_mongo_collection_ratings_query_total</code> (click
(click <a href="http://localhost:9090/graph#%5B%7B%22range_input%22%3A%221h%22%2C%22expr%22%3A%22envoy_mongo_mongo_collection_ratings_query_total%22%2C%22tab%22%3A1%7D%5D">here</a>
to execute the query).</p>
</blockquote>
</li>
</ol>
<h2 id="understanding-tcp-telemetry-collection">Understanding TCP telemetry collection</h2>
<p>In this task, you added Istio configuration that instructed Mixer to
automatically generate and report a new metric for all traffic to a TCP service
within the mesh.</p>
<p>Similar to the <a href="/v0.8/docs/tasks/telemetry/metrics-logs/">Collecting Metrics and
Logs</a> Task, the new
configuration consisted of <em>instances</em>, a <em>handler</em>, and a <em>rule</em>. Please see
that Task for a complete description of the components of metric collection.</p>
<p>Metrics collection for TCP services differs only in the limited set of
attributes that are available for use in <em>instances</em>.</p>
<h3 id="tcp-attributes">TCP Attributes</h3>
<p>Several TCP-specific attributes enable TCP policy and control within Istio.
These attributes are generated by server-side Envoy proxies. They are forwarded to Mixer at connection establishment, and forwarded periodically when connection is alive (periodical report), and forwarded at connection close (final report). The default interval for periodical report is 10 seconds, and it should be at least 1 second. Additionally, context attributes provide the ability to distinguish between <code>http</code> and <code>tcp</code>
protocols within policies.</p>
<figure style="width: 100%">
<div class="wrapper-with-intrinsic-ratio" style="padding-bottom: 192.50%">
<a class="not-for-endnotes" href="/v0.8/docs/tasks/telemetry/img/istio-tcp-attribute-flow.svg">
<img class="element-to-stretch" src="/v0.8/docs/tasks/telemetry/img/istio-tcp-attribute-flow.svg" alt="Attribute Generation Flow for TCP Services in an Istio Mesh." title="TCP Attribute Flow" />
</a>
</div>
<figcaption>TCP Attribute Flow</figcaption>
</figure>
<h2 id="cleanup">Cleanup</h2>
<ul>
<li>
<p>Remove the new telemetry configuration:</p>
<pre><code class="language-command" data-lang="command">$ istioctl delete -f tcp_telemetry.yaml
</code></pre></li>
<li>
<p>Remove the <code>port-forward</code> process:</p>
<pre><code class="language-command" data-lang="command">$ killall kubectl
</code></pre></li>
<li>
<p>If you are not planning to explore any follow-on tasks, refer to the
<a href="/v0.8/docs/guides/bookinfo/#cleanup">Bookinfo cleanup</a> instructions
to shutdown the application.</p>
</li>
</ul>
<h2 id="whats-next">What's next</h2>
<ul>
<li>
<p>Learn more about <a href="/v0.8/docs/concepts/policies-and-telemetry/overview/">Mixer</a>
and <a href="/v0.8/docs/concepts/policies-and-telemetry/config/">Mixer Config</a>.</p>
</li>
<li>
<p>Discover the full <a href="/v0.8/docs/reference/config/policy-and-telemetry/attribute-vocabulary/">Attribute
Vocabulary</a>.</p>
</li>
<li>
<p>Refer to the <a href="/v0.8/docs/guides/telemetry/">In-Depth Telemetry</a> guide.</p>
</li>
<li>
<p>Learn more about <a href="/v0.8/docs/tasks/telemetry/querying-metrics/">Querying Istio
Metrics</a>.</p>
</li>
<li>
<p>Learn more about the <a href="https://www.envoyproxy.io/docs/envoy/latest/configuration/network_filters/mongo_proxy_filter#statistics">MongoDB-specific statistics generated by
Envoy</a>.</p>
</li>
</ul>
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