How to configure a certain set of SSL ciphers for secure communication in nginx ingress controller
This document (000021312) is provided subject to the disclaimer at the end of this document.
Environment
Rancher 2.6.x and 2.7.x
Situation
Certain SSL ciphers must be configured for secure communication in the Nginx controller.
Resolution
Add the ssl-ciphers: under data: in the configmap of rke2-ingress-nginx-controller in the kube-system namespace
Note - The same steps can be applied on rke cluster also. However, the configmap name is the rke-ingress-controller under kube-system namespace
kubectl edit cm -n kube-system rke2-ingress-nginx-controller
apiVersion: v1
data:
allow-snippet-annotations: "false"
ssl-ciphers: ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384
kind: ConfigMap
metadata:
annotations:
meta.helm.sh/release-name: rke2-ingress-nginx
meta.helm.sh/release-namespace: kube-system
creationTimestamp: "2023-04-04T06:49:23Z"
labels:
app.kubernetes.io/component: controller
app.kubernetes.io/instance: rke2-ingress-nginx
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/name: rke2-ingress-nginx
app.kubernetes.io/part-of: rke2-ingress-nginx
app.kubernetes.io/version: 1.2.0
helm.sh/chart: rke2-ingress-nginx-4.1.008
name: rke2-ingress-nginx-controller
namespace: kube-system
resourceVersion: "185326591"
uid: af0364c8-4356-4047-ad6d-641400726725
Check if the SSL ciphers are captured is captured by the below command. Exec into the pod
kubectl exec -it rke2-ingress-nginx-controller-m467j -n kube-system -- bash
www-data@rke2-ingress-nginx-controller-m467j:/etc/nginx> /dbg conf | grep -i cipher
# allow configuring custom ssl ciphers
ssl_ciphers 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384';
ssl_prefer_server_ciphers on;
Note - The same steps can be applied on rke cluster also. However, the configmap name is the rke-ingress-controller under kube-system namespace
Status
Top Issue
Disclaimer
This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.
- Document ID:000021312
- Creation Date: 28-Dec-2023
- Modified Date:22-Jul-2024
-
- SUSE Rancher
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