Ingress mTLS CA cert invalid

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Symptom

An ApigeeIssue with Reason AIS_INGRESS_MTLS_CA_CERT_INVALID is shown when viewing resources in the apigee namespace.

Error messages

After running kubectl -n apigee get apigeeissues, an error like the following is displayed: 

NAME                                    SEVERITY   REASON                             DOCUMENTATION                                                                                  AGE
ca-cert-invalid-my-org-my-virtualhost   ERROR      AIS_INGRESS_MTLS_CA_CERT_INVALID   https://cloud.google.com/apigee/docs/hybrid/troubleshooting/AIS_INGRESS_MTLS_CA_CERT_INVALID   5h18m

Possible causes

Cause Description
Ingress mTLS CA certificate is not PEM-encoded The configured ingress mTLS CA certificate is not PEM-encoded.
Ingress mTLS CA certificate is malformed The configured ingress mTLS CA certificate is malformed.

Cause: Ingress mTLS CA certificate is not PEM-encoded

The ingress mTLS CA certificate stored in the Kubernetes secret referenced by an ApigeeRouteConfig is missing the PEM-encoding text blocks (or they are malformed).

Diagnosis

Run the following command: 

kubectl -n apigee describe apigeeissue ISSUE_NAME

Where ISSUE_NAME is the name of the issue. For example, ca-cert-invalid-my-org-my-virtualhost.

The output should look similar to the following: 

Name:         ca-cert-invalid-my-org-my-virtualhost
Namespace:    apigee
Labels:       ais-reason=AIS_INGRESS_MTLS_CA_CERT_INVALID
Annotations:  <none>
API Version:  apigee.cloud.google.com/v1alpha1
Kind:         ApigeeIssue
Metadata:
  Creation Timestamp:  2023-06-12T17:03:43Z
  Generation:          1
  Owner References:
    API Version:     apigee.cloud.google.com/v1alpha2
    Kind:            ApigeeOrganization
    Name:            my-org
    UID:             7e83a52c-ce00-4bed-98be-55835ada1817
  Resource Version:  3281563
  UID:               adc775c2-376d-4bf9-9860-500b2b2b8273
Spec:
  Details:        CA certificate in secret "my-org-my-virtualhost" for ApigeeRouteConfig "my-org-my-virtualhost" is not PEM encoded
  Documentation:  https://cloud.google.com/apigee/docs/hybrid/troubleshooting/AIS_INGRESS_MTLS_CA_CERT_INVALID
  Reason:         AIS_INGRESS_MTLS_CA_CERT_INVALID
  Severity:       ERROR
Events:           <none>
Spec:
  Details:        CA certificate in secret "my-org-my-virtualhost" for ApigeeRouteConfig "my-org-my-virtualhost" is not PEM encoded

The contents of Spec.Details explains the name of the ApigeeRouteConfig that refers to the Kubernetes secret containing the ingress mTLS CA certificate which is not PEM-encoded.

Resolution

  1. Use kubectl describe to display the name of the ApigeeRouteConfig which has the ingress mTLS CA cert which is not PEM-encoded: 

    kubectl -n apigee describe apigeeissue ISSUE_NAME

    Where ISSUE_NAME is the name of the issue. For example, ca-cert-invalid-my-org-my-virtualhost.

    In this example, the ApigeeRouteConfig my-org-my-virtualhost is referencing the secret my-org-my-virtualhost.

  2. Determine the virtualhost name from the ApigeeRouteConfig.

    The ApigeeRouteConfig's name is in the format: <Apigee organization>-<virtualhost name>.

    In this example, my-org is the Apigee organization and the virtualhost name is my-virtualhost.

  3. Find the corresponding virtualhost in your overrides.yaml.

    virtualhosts:
...
- name: my-virtualhost
  selector:
    app: apigee-ingressgateway
  caCertPath: ./certs/ca.pem
  sslCertPath: ./certs/vhost.pem
  sslKeyPath: ./certs/vhost.key
...

  4. Validate the contents of the file provided via the path declared in caCertPath. Ensure the content contains the required starting and ending certificate blocks. For example: 

    -----BEGIN CERTIFICATE-----
MIIDYTCCAkmgAwIBAgIUSXeU0pQYRFzYlqZpKhNNJdBLFBIwDQYJKoZIhvcNAQEL
... <contents omitted> ...
eWJyaWQuZTJlLmFwaWdlZWtzLm5ldDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCC
MMM=
-----END CERTIFICATE-----

  5. Once the contents and format of the file have been fixed, apply the change to the virtualhost: 

    helm upgrade ENV_GROUP_NAME apigee-virtualhost/ \
  --namespace apigee \
  --set envgroup=ENV_GROUP_NAME \
  -f overrides.yaml

Cause: Ingress mTLS CA certificate is malformed

The ingress mTLS CA certificate stored in the Kubernetes secret referenced by an ApigeeRouteConfig is malformed.

Diagnosis

Run the following command: 

kubectl -n apigee describe apigeeissue ISSUE_NAME

Where ISSUE_NAME is the name of the issue. For example, ca-cert-invalid-my-org-my-virtualhost.

The output should look similar to the following: 

Name:         ca-cert-invalid-my-org-my-virtualhost
Namespace:    apigee
Labels:       ais-reason=AIS_INGRESS_MTLS_CA_CERT_INVALID
Annotations:  <none>
API Version:  apigee.cloud.google.com/v1alpha1
Kind:         ApigeeIssue
Metadata:
  Creation Timestamp:  2023-06-12T17:03:43Z
  Generation:          1
  Owner References:
    API Version:     apigee.cloud.google.com/v1alpha2
    Kind:            ApigeeOrganization
    Name:            my-org
    UID:             7e83a52c-ce00-4bed-98be-55835ada1817
  Resource Version:  3281563
  UID:               adc775c2-376d-4bf9-9860-500b2b2b8273
Spec:
  Details:        CA certificate in secret "my-org-my-virtualhost" for ApigeeRouteConfig "my-org-my-virtualhost" is invalid
  Documentation:  https://cloud.google.com/apigee/docs/hybrid/troubleshooting/AIS_INGRESS_MTLS_CA_CERT_INVALID
  Reason:         AIS_INGRESS_MTLS_CA_CERT_INVALID
  Severity:       ERROR
Events:           <none>
Spec:
  Details:        CA certificate in secret "my-org-my-virtualhost" for ApigeeRouteConfig "my-org-my-virtualhost" is invalid

The contents of Spec.Details explains the name of the ApigeeRouteConfig that refers to the Kubernetes secret containing the ingress mTLS CA certificate which is malformed and failed to parse.

Resolution

  1. Use kubectl describe to display the name of the ApigeeRouteConfig which has the ingress mTLS CA cert which is malformed: 

    kubectl -n apigee describe apigeeissue ISSUE_NAME

    Where ISSUE_NAME is the name of the issue. For example, ca-cert-invalid-my-org-my-virtualhost.

    In this example, the ApigeeRouteConfig my-org-my-virtualhost is referencing the secret my-org-my-virtualhost.

  2. Determine the virtualhost name from the ApigeeRouteConfig.

    The ApigeeRouteConfig's name is in the format: <Apigee organization>-<virtualhost name>.

    In this example, my-org is the Apigee organization and the virtualhost name is my-virtualhost.

  3. Find the corresponding virtualhost in your overrides.yaml.

    virtualhosts:
...
- name: my-virtualhost
  selector:
    app: apigee-ingressgateway
  caCertPath: ./certs/ca.pem
  sslCertPath: ./certs/vhost.pem
  sslKeyPath: ./certs/vhost.key
...

  4. Validate the contents of the file provided via the path declared in caCertPath. Ensure the contents contain the entire certificate. For example: 

    -----BEGIN CERTIFICATE-----
MIIDYTCCAkmgAwIBAgIUSXeU0pQYRFzYlqZpKhNNJdBLFBIwDQYJKoZIhvcNAQEL
BQAwQDE+MDwGA1UEAww1bWF4bWlsbGlvbi1oeWJyaWQtc3RhZ2luZy1kZXYuaHli
... <contents omitted> ...
0TPPaik8U9dtFXMGT1DJkjPRPO0Jw5rlU8DKlNA/Kkv52aKJZNwB/cwmvoa/BFji
PIPa9wY=
-----END CERTIFICATE-----

  5. Once the contents and format of the file have been fixed, apply the change to the virtualhost: 

    helm upgrade ENV_GROUP_NAME apigee-virtualhost/ \
  --namespace apigee \
  --set envgroup=ENV_GROUP_NAME \
  -f overrides.yaml

Must gather diagnostic information

If the problem persists even after following the above instructions, gather the following diagnostic information and then contact Apigee Support:

  1. The Google Cloud Project ID.
  2. The name of the Apigee hybrid organization.
  3. The Spec.Details field of the ApigeeIssue.
  4. (optional) File referenced by caCertPath for the affected virtualhost.