interfaces</code></td></tr><tr><td><code>global.proxy.envoyMetricsService.enabled</code></td><td><code>false</code></td><td></td></tr><tr><td><code>global.proxy.envoyMetricsService.host</code></td><td>``</td><td><code>example: metrics-service.istio-system</code></td></tr><tr><td><code>global.proxy.envoyMetricsService.port</code></td><td>``</td><td><code>example: 15000</code></td></tr><tr><td><code>global.proxy.tracer</code></td><td><code>"zipkin"</code></td><td><code>Specify which tracer to use. One of: lig