Added check for certificate expiration issue

aci-preupgrade-validation-script.py

@@ -6702,6 +6702,116 @@ def stale_dbgacEpgSummaryTask_check(tversion, **kwargs):
     return Result(result=result, headers=headers, data=data, recommended_action=recommended_action, doc_url=doc_url)
 
 
+@check_wrapper(check_title='Certificate Expiration Check')
+def certificate_expiration_check(cversion, username, password, fabric_nodes, **kwargs):
+    result = PASS
+    headers = ["Fault Code", "Severity", "Description"]
+    data = []
+    recommended_action = ""
+    doc_url = 'https://datacenter.github.io/ACI-Pre-Upgrade-Validation-Script/validations/#certificate-expiration-check'
+
+    fault_min_versions = [
+        ("F4501", "6.0(4c)"), ("F4502", "6.0(4c)"),  # KeyRing cert expiring/expired
+        ("F4503", "6.1(1e)"), ("F4617", "6.1(1e)"),  # TP cert expired/expiring
+        ("F3081", "3.1(2f)"), ("F3082", "3.1(2f)"),  # SAML encryption cert expiring/expired
+        ("F4752", "6.1(5e)"), ("F4753", "6.1(5e)"),  # Factory certificate expired/expiring
+    ]
+    FACTORY_CERT_MIN_VERSION = "6.1(5e)"
+    FACTORY_CERT_EXPIRING_DAYS = 30
+
+    has_critical = has_major = has_error = False
+
+    applicable_codes = [code for code, ver in fault_min_versions if not cversion.older_than(ver)]
+    if applicable_codes:
+        fault_filter = ",".join('eq(faultInst.code,"{}")'.format(code) for code in applicable_codes)
+        for faultInst in icurl('class', 'faultInst.json?query-target-filter=or({})'.format(fault_filter)):
+            fault_attrs = faultInst['faultInst']['attributes']
+            if fault_attrs['lc'] not in ("raised", "soaking"):
+                continue
+            data.append([fault_attrs['code'], fault_attrs['severity'], fault_attrs['descr']])
+            if fault_attrs['severity'] == 'critical':
+                has_critical = True
+            elif fault_attrs['severity'] == 'major':
+                has_major = True
+
+    if cversion.older_than(FACTORY_CERT_MIN_VERSION) and username and password:
+        date_format = "%b %d %H:%M:%S %Y"
+        current_date_re = re.compile(
+            r'[A-Z][a-z]{2}\s+(?P<mon>[A-Z][a-z]{2})\s+(?P<day>\d+)\s+(?P<time>\d{2}:\d{2}:\d{2})\s+\w+\s+(?P<year>\d{4})'
+        )
+        cert_expiry_re = re.compile(
+            r'notAfter=(?P<date>[A-Z][a-z]{2}\s+\d+\s+\d{2}:\d{2}:\d{2}\s+\d{4})'
+        )
+
+        controllers = (node for node in fabric_nodes if node["fabricNode"]["attributes"]["role"] == "controller")
+        controllers = list(controllers)
+        for controller in controllers:
+            node_attrs = controller["fabricNode"]["attributes"]
+            node_id = node_attrs["id"]
+            node_name = node_attrs["name"]
+            node_addr = node_attrs.get("address")
+            if not node_addr:
+                continue
+            try:
+                c = Connection(node_addr)
+                c.username = username
+                c.password = password
+                c.log = LOG_FILE
+                c.connect()
+                c.cmd("date")
+                current_date_match = current_date_re.search(c.output)
+                c.cmd("acidiag verifyapic")
+                cert_expiry_match = cert_expiry_re.search(c.output)
+            except Exception as e:
+                data.append(["N/A", "error",
+                             "APIC {} ({}): unable to verify factory certificate - {}".format(node_id, node_name, e)])
+                has_error = True
+                continue
+
+            try:
+                current_date = datetime.strptime(
+                    "{mon} {day} {time} {year}".format(**current_date_match.groupdict()), date_format
+                )
+            except (AttributeError, ValueError):
+                data.append(["N/A", "error",
+                             "APIC {} ({}): unable to determine current date".format(node_id, node_name)])
+                has_error = True
+                continue
+
+            try:
+                cert_expiry = datetime.strptime(" ".join(cert_expiry_match.group("date").split()), date_format)
+            except (AttributeError, ValueError):
+                data.append(["N/A", "error",
+                             "APIC {} ({}): unable to determine factory certificate expiry date".format(node_id, node_name)])
+                has_error = True
+                continue
+
+            if cert_expiry <= current_date:
+                data.append(["N/A", "critical",
+                             "APIC {} ({}): factory certificate expired on {} UTC".format(node_id, node_name, cert_expiry)])
+                has_critical = True
+            elif (cert_expiry - current_date).days <= FACTORY_CERT_EXPIRING_DAYS:
+                data.append(["N/A", "major",
+                             "APIC {} ({}): factory certificate expiring on {} UTC".format(node_id, node_name, cert_expiry)])
+                has_major = True
+
+    if data:
+        if has_error:
+            result = ERROR
+            recommended_action = 'Manually verify the factory certificate expiry using `acidiag verifyapic` on the affected APIC(s).'
+        elif has_critical and has_major:
+            result = FAIL_O
+            recommended_action = 'Renew expired certificate(s) immediately. For certificate(s) approaching expiry, renew before they expire to avoid service disruption.'
+        elif has_critical:
+            result = FAIL_O
+            recommended_action = 'Renew the certificate(s) immediately to restore functionality.'
+        elif has_major:
+            result = MANUAL
+            recommended_action = 'Renew the certificate(s) before they expire to avoid service disruption.'
+
+    return Result(result=result, headers=headers, data=data, recommended_action=recommended_action, doc_url=doc_url)
+
+
 # ---- Script Execution ----
 
 
@@ -6816,6 +6926,7 @@ class CheckManager:
         equipment_disk_limits_exceeded,
         apic_vmm_inventory_sync_faults_check,
         apic_storage_inode_check,
+        certificate_expiration_check,
 
         # Configurations
         vpc_paired_switches_check,

docs/docs/validations.md

@@ -87,6 +87,7 @@ Items                                         | Faults         | This Script
 [Equipment Disk Limits][f20]                  | F1820: 80% -minor<br>F1821: -major<br>F1822: -critical | :white_check_mark: | :no_entry_sign:
 [VMM Inventory Partially Synced][f21]         | F0132: comp-ctrlr-operational-issues | :white_check_mark: | :no_entry_sign:
 [APIC Storage Inode Usage][f22]               | F4388: 75% - 85% -warning<br>F4389: 85% - 90% -major<br>F4390: 90% or more -critical | :white_check_mark: | :no_entry_sign:
+[Certificate Expiration Check][f23]           | F4501/F4502: KeyRing expiring/expired<br>F4617/F4503: TP expiring/expired<br>F3081/F3082: SAML expiring/expired<br>F4752/F4753: Factory expiring/expired | :white_check_mark: | :no_entry_sign:
 
 [f1]: #apic-disk-space-usage
 [f2]: #standby-apic-disk-space-usage
@@ -110,6 +111,7 @@ Items                                         | Faults         | This Script
 [f20]: #equipment-disk-limits
 [f21]: #vmm-inventory-partially-synced
 [f22]: #apic-storage-inode-usage
+[f23]: #certificate-expiration-check
 
 ### Configuration Checks
 
@@ -1639,7 +1641,115 @@ To recover from this fault, try the following action
     type            : operational
     ```
 
-
+### Certificate Expiration Check
+
+ACI uses various X.509 certificates for security and authentication purposes. If these certificates expire or are about to expire, it can cause service disruptions or failures. The fabric will raise different faults depending on the certificate type.
+
+**Expiring Certificates (Major Severity):**
+
+* **F4501**: KeyRing X.509 Certificate expiring - This fault occurs when a custom KeyRing X.509 Certificate is going to expire in one month.
+
+* **F3081**: SAML X.509 Certificate expiring - This fault occurs when the SAML X.509 Certificate is going to expire in one month.
+
+* **F4617**: TP X.509 Certificate expiring - This fault occurs when a Trust Point X.509 Certificate is expiring.
+
+* **F4752**: Factory X.509 Certificate expiring - This fault occurs when the factory Certificate is expiring.
+
+
+**Expired Certificates (Critical Severity):**
+
+* **F4502**: KeyRing X.509 Certificate expired - This fault occurs when a custom KeyRing X.509 Certificate has expired.
+
+* **F4503**: TP X.509 Certificate expired - This fault occurs when a Trust Point X.509 Certificate has expired.
+
+* **F3082**: SAML X.509 Certificate expired - This fault occurs when the SAML Encryption X.509 Certificate has expired.
+
+* **F4753**: Factory X.509 Certificate expired - This fault occurs when the factory Certificate has expired.
+
+
+**Recommended Actions:**
+
+* For expiring certificates (F4501, F3081, F4617, F4752): Renew the certificate(s) before they expire to avoid service disruption.
+
+* For expired certificates (F4502, F4503, F3082, F4753): Renew the certificate(s) immediately to restore functionality.
+
+!!! example "Fault Example (F4502: Expired KeyRing Certificate)"
+    The following shows an example of an expired KeyRing certificate:
+    ```
+    admin@apic1:~> moquery -c faultInst -f 'fault.Inst.code=="F4502"'
+    Total Objects shown: 1
+
+    # fault.Inst
+    code             : F4502
+    ack              : no
+    alert            : no
+    annotation       :
+    cause            : cert-expired
+    changeSet        :
+    childAction      :
+    created          : 2026-05-12T05:23:26.549+00:00
+    delegated        : no
+    descr            : KeyRing Certificate THD_KEYRING expired
+    dn               : uni/userext/pkiext/keyring-THD_KEYRING/fault-F4502
+    domain           : security
+    extMngdBy        : undefined
+    highestSeverity  : critical
+    lastTransition   : 2026-05-12T05:25:51.231+00:00
+    lc               : raised
+    modTs            : never
+    occur            : 1
+    origSeverity     : critical
+    prevSeverity     : critical
+    rn               : fault-F4502
+    rule             : pki-key-ring-custom-key-ring-expired
+    severity         : critical
+    status           :
+    subject          : security-provider
+    title            :
+    type             : operational
+    uid              :
+    userdom          : all
+    ```
+
+!!! example "Fault Example (F4501: Expiring KeyRing Certificate)"
+    The following shows an example of a KeyRing certificate expiring in one month:
+    ```
+    admin@apic1:~> moquery -c faultInst -f 'fault.Inst.code=="F4501"'
+    Total Objects shown: 1
+
+    # fault.Inst
+    code             : F4501
+    ack              : no
+    alert            : no
+    annotation       :
+    cause            : cert-expiring
+    changeSet        :
+    childAction      :
+    created          : 2026-04-12T05:23:26.549+00:00
+    delegated        : no
+    descr            : KeyRing Certificate THD_KEYRING expiring in one month
+    dn               : uni/userext/pkiext/keyring-THD_KEYRING/fault-F4501
+    domain           : security
+    extMngdBy        : undefined
+    highestSeverity  : major
+    lastTransition   : 2026-04-12T05:25:51.231+00:00
+    lc               : raised
+    modTs            : never
+    occur            : 1
+    origSeverity     : major
+    prevSeverity     : major
+    rn               : fault-F4501
+    rule             : pki-key-ring-custom-key-ring-expiring
+    severity         : major
+    status           :
+    subject          : security-provider
+    title            :
+    type             : operational
+    uid              :
+    userdom          : all
+    ```
+
+
 ## Configuration Check Details
 
 ### VPC-paired Leaf switches                       

tests/checks/certificate_expiration_check/faultInst_F3081.json

@@ -0,0 +1,13 @@
+[
+    {
+        "faultInst": {
+            "attributes": {
+                "code": "F3081",
+                "severity": "major",
+                "lc": "raised",
+                "descr": "SAML Signing Certificate expiring in one month",
+                "dn": "uni/userext/samlext/samlidp-IDP1/fault-F3081"
+            }
+        }
+    }
+]

tests/checks/certificate_expiration_check/faultInst_F3082.json

@@ -0,0 +1,13 @@
+[
+    {
+        "faultInst": {
+            "attributes": {
+                "code": "F3082",
+                "severity": "critical",
+                "lc": "raised",
+                "descr": "SAML Encryption Certificate has expired",
+                "dn": "uni/userext/samlext/samlencert-default/fault-F3082"
+            }
+        }
+    }
+]

tests/checks/certificate_expiration_check/faultInst_F4501.json

@@ -0,0 +1,13 @@
+[
+    {
+        "faultInst": {
+            "attributes": {
+                "code": "F4501",
+                "severity": "major",
+                "lc": "raised",
+                "descr": "KeyRing Certificate THD_KEYRING expiring",
+                "dn": "uni/userext/pkiext/keyring-THD_KEYRING/fault-F4501"
+            }
+        }
+    }
+]

tests/checks/certificate_expiration_check/faultInst_F4502.json

@@ -0,0 +1,13 @@
+[
+    {
+        "faultInst": {
+            "attributes": {
+                "code": "F4502",
+                "severity": "critical",
+                "lc": "raised",
+                "descr": "KeyRing Certificate THD_KEYRING expired",
+                "dn": "uni/userext/pkiext/keyring-THD_KEYRING/fault-F4502"
+            }
+        }
+    }
+]

tests/checks/certificate_expiration_check/faultInst_F4503.json

@@ -0,0 +1,13 @@
+[
+    {
+        "faultInst": {
+            "attributes": {
+                "code": "F4503",
+                "severity": "critical",
+                "lc": "raised",
+                "descr": "TP Certificate THD_CA expired",
+                "dn": "uni/userext/pkiext/tp-THD_CA/fault-F4503"
+            }
+        }
+    }
+]

tests/checks/certificate_expiration_check/faultInst_F4617.json

@@ -0,0 +1,13 @@
+[
+    {
+        "faultInst": {
+            "attributes": {
+                "code": "F4617",
+                "severity": "major",
+                "lc": "raised",
+                "descr": "TP Certificate expiring",
+                "dn": "uni/fabric/comm-default/https/fault-F4617"
+            }
+        }
+    }
+]

tests/checks/certificate_expiration_check/faultInst_F4752.json

@@ -0,0 +1,13 @@
+[
+    {
+        "faultInst": {
+            "attributes": {
+                "code": "F4752",
+                "severity": "major",
+                "lc": "raised",
+                "descr": "Factory certificate expiring",
+                "dn": "topology/pod-1/node-1/sys/ch/fault-F4752"
+            }
+        }
+    }
+]

tests/checks/certificate_expiration_check/faultInst_F4753.json

@@ -0,0 +1,13 @@
+[
+    {
+        "faultInst": {
+            "attributes": {
+                "code": "F4753",
+                "severity": "critical",
+                "lc": "raised",
+                "descr": "Factory certificate expired",
+                "dn": "topology/pod-1/node-1/sys/ch/fault-F4753"
+            }
+        }
+    }
+]

tests/checks/certificate_expiration_check/faultInst_cleared.json

@@ -0,0 +1,13 @@
+[
+    {
+        "faultInst": {
+            "attributes": {
+                "code": "F4502",
+                "severity": "critical",
+                "lc": "retaining",
+                "descr": "KeyRing Certificate THD_KEYRING expired",
+                "dn": "uni/userext/pkiext/keyring-THD_KEYRING/fault-F4502"
+            }
+        }
+    }
+]