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<button id=search-close title="Cancel search" type=reset aria-label="Cancel search"><svg class="icon"><use xlink:href="/v1.4/img/icons.svg#cancel-x"/></svg></button></form></nav></header><div class=banner-container></div><main class="primary notoc"><div id=sidebar-container class="sidebar-container sidebar-offcanvas"><nav id=sidebar aria-label="Section Navigation"><div class=directory><div class=card><div id=header0 class=header title="Frequently Asked Questions about Istio."><svg class="icon"><use xlink:href="/v1.4/img/icons.svg#faq"/></svg>FAQ</div><div class="body default" aria-labelledby=header0><ul role=tree aria-expanded=true class=leaf-section aria-labelledby=header0><li role=none><a role=treeitem title="General Q & A." href=/v1.4/faq/general/>General</a></li><li role=none><a role=treeitem title="Setup Q & A." href=/v1.4/faq/setup/>Setup</a></li><li role=none><span role=treeitem class=current title="Application Specific Q & A.">Applications</span></li><li role=none><a role=treeitem title="Security Q & A." href=/v1.4/faq/security/>Security</a></li><li role=none><a role=treeitem title="Mixer Q & A." href=/v1.4/faq/mixer/>Mixer</a></li><li role=none><a role=treeitem title="Metrics and Logs Q & A." href=/v1.4/faq/metrics-and-logs/>Metrics and Logs</a></li><li role=none><a role=treeitem title="Distributed Tracing Q & A." href=/v1.4/faq/distributed-tracing/>Distributed Tracing</a></li><li role=none><a role=treeitem title="Traffic Management Q & A." href=/v1.4/faq/traffic-management/>Traffic Management</a></li></ul></div></div></div></nav></div><div class=article-container><nav aria-label=Breadcrumb><ol><li><a href=/v1.4/ title="Connect, secure, control, and observe services.">Istio</a></li><li><a href=/v1.4/faq/ title="Frequently Asked Questions about Istio.">FAQ</a></li><li>Applications</li></ol></nav><article aria-labelledby=title><div class=title-area><i class=title-icon><svg class="icon"><use xlink:href="/v1.4/img/icons.svg#faq"/></svg></i><div style=width:100%><h1 id=title>Applications FAQ</h1></div></div><nav class="toc-inlined toc-forced"><hr><div class=directory role=directory><nav id=InlineTableOfContents><ol><li role=none aria-label="Can I run Casandra inside an Istio mesh?"><a href=#cassandra>Can I run Casandra inside an Istio mesh?</a></li><li role=none aria-label="Can I run Elasticsearch inside an Istio mesh?"><a href=#elasticsearch>Can I run Elasticsearch inside an Istio mesh?</a></li><li role=none aria-label="Can I run Zookeeper inside an Istio mesh?"><a href=#zookeeper>Can I run Zookeeper inside an Istio mesh?</a></li></ol></nav></div><hr></nav><div class=faq><h5 id=cassandra class=question>Can I run Casandra inside an Istio mesh?</h5><div class=answer><p>By default, Cassandra broadcasts the address it uses for binding
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(accepting connections) to other Cassandra nodes as its address. This
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is usually the pod IP address and works fine without a service
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mesh. However, with a service mesh this configuration does not
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work. Istio and other service meshes require <code>localhost</code>
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(<code>127.0.0.1</code>) to be the address for binding.</p><p>There are two configuration parameters to pay attention to:
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<a href="http://cassandra.apache.org/doc/latest/configuration/cassandra_config_file.html?highlight=listen_address#listen-address"><code>listen_address</code></a>
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and
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<a href="http://cassandra.apache.org/doc/latest/configuration/cassandra_config_file.html?highlight=listen_address#broadcast-address"><code>broadcast_address</code></a>. For
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running Cassandra in an Istio mesh,
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the <code>listen_address</code> parameter should be set to <code>127.0.0.1</code> and the
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<code>broadcast_address</code> parameter should be set to the pod IP address.</p><p>These configuration parameters are defined in <code>cassandra.yaml</code> in the
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Cassandra configuration directory (e.g. <code>/etc/cassandra</code>). There are
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various startup scripts (and yaml files) used for starting Cassandra
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and care should be given to how these parameters are set by these
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scripts. For example, some scripts used to configure and start
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Cassandra use the value of the environment variable
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<code>CASSANDRA_LISTEN_ADDRESS</code> for setting <code>listen_address</code>.</p></div><h5 id=elasticsearch class=question>Can I run Elasticsearch inside an Istio mesh?</h5><div class=answer><p>There are two Elasticsearch configuration parameters that need to be
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set appropriately to run Elasticsearch with Istio:
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<code>network.bind_host</code> and <code>network.publish_host</code>. By default, these
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parameters are set to the <code>network.host</code> parameter. If <code>network.host</code>
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is set to <code>0.0.0.0</code>, Elasticsearch will most likely pick up the pod IP
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as the publishing address and no further configuration will be
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needed.</p><p>If the default configuration does not work, you can set the
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<code>network.bind_host</code> to <code>0.0.0.0</code> or <code>localhost</code> (<code>127.0.0.1</code>) and
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<code>network.publish_host</code> to the pod IP. For example:</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>...
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containers:
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- name: elasticsearch
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image: docker.elastic.co/elasticsearch/elasticsearch:7.2.0
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env:
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- name: network.bind_host
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value: 127.0.0.1
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- name: network.publish_host
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valueFrom:
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fieldRef:
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fieldPath: status.podIP
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...
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</code></pre><p>Refer to <a href=https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-network.html#modules-network>Network Settings for Elasticsearch</a>
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for more information.</p></div><h5 id=zookeeper class=question>Can I run Zookeeper inside an Istio mesh?</h5><div class=answer><p>By default, Zookeeper listens on the pod IP address for communication
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between servers. Istio and other service meshes require <code>localhost</code>
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(<code>127.0.0.1</code>) to be the address to listen on.</p><p>There is a configuration parameter that can be used to change this
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default behavior:
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<a href=https://zookeeper.apache.org/doc/r3.5.7/zookeeperAdmin.html><code>quorumListenOnAllIPs</code></a>.
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This option allows Zookeeper to listen on all addresses including the
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<code>localhost</code>. Set this parameter to <code>true</code> by using the
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following command where <code>$ZK_CONFIG_FILE</code> is your Zookeeper
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configuration file.</p><pre><code class=language-bash data-expandlinks=true data-repo=istio>$ echo "quorumListenOnAllIPs=true" >> $ZK_CONFIG_FILE
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</code></pre></div></div></article><nav class=pagenav><div class=left><a title="Setup Q & A." href=/v1.4/faq/setup/><svg class="icon"><use xlink:href="/v1.4/img/icons.svg#left-arrow"/></svg>Setup</a></div><div class=right><a title="Security Q & A." href=/v1.4/faq/security/>Security<svg class="icon"><use xlink:href="/v1.4/img/icons.svg#right-arrow"/></svg></a></div></nav><div id=endnotes-container aria-hidden=true><h2>Links</h2><ol id=endnotes></ol></div></div></main><footer><div class=user-links><a class=channel title="Go download Istio 1.4.6 now" href=/v1.4/docs/setup/getting-started/#download aria-label="Download Istio"><span>download</span><svg class="icon"><use xlink:href="/v1.4/img/icons.svg#download"/></svg>
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1.4.6<br>© 2019 Istio Authors, <a href=https://policies.google.com/privacy>Privacy Policy</a><br>Archived on March 5, 2020</p></div><div class=dev-links><a class=channel title="GitHub is where development takes place on Istio code" href=https://github.com/istio/community aria-label=GitHub><span>github</span><svg class="icon"><use xlink:href="/v1.4/img/icons.svg#github"/></svg></a>
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