_server_cert_chain_expiry_timestamp</code></td><td><code>LastValue</code></td><td>The unix timestamp, in seconds, when Istio generated cert chain will expire.</td></tr>
<tr><td><code>citadel_server_csr_count</code></td><td><code>Sum</code></td><td>The number of CSRs received by Citadel server.</td></tr>
<tr><td><code>citadel_server_csr_parsing_err_count</code></td><td><code>Sum</code></td><td>The number of errors occurred when parsing the CSR.</td></tr>
<tr><td><code>citadel_server_csr_sign_err_count</code>