><p>The <code>app</code> label: Each deployment should have a distinct
<code>app</code> label with a meaningful value. The <code>app</code> label is used to add
contextual information in distributed tracing.</p></li><li><p>The <code>version</code> label: This label indicates the version of the application
corresponding to the particular deployment.</p></li></ul></li><li><p><strong>Named service ports</strong>: Service ports may optionally be named to explicitly specify a protocol.
See <a href=/v1.10/docs/op