es_total</code></td><td><code>Sum</code></td><td>Total number of auto registration updates.</td></tr>
<tr><td><code>citadel_server_authentication_failure_count</code></td><td><code>Sum</code></td><td>The number of authentication failures.</td></tr>
<tr><td><code>citadel_server_cert_chain_expiry_seconds</code></td><td><code>LastValue</code></td><td>The time remaining, in seconds, before the Istio Generated cert chain will expire. A negative value indicates the cert is expired.</td></tr>
<tr><td><code>citadel