Defaults certificate for Ingresses

Cilium can use a default certificate for ingresses without .spec.tls[].secretName set. It’s still necessary to have .spec.tls[].hosts defined.

Prerequisites

Cilium must be configured with Kubernetes Ingress Support. Please refer to Kubernetes Ingress Support for more details.

Installation

Defaults certificate for Ingresses can be enabled with helm flags ingressController.defaultSecretNamespace and ingressController.defaultSecretName` set as true. Please refer to Installation using Helm for a fresh installation.

helm upgrade cilium ./cilium \
   --namespace kube-system \
   --reuse-values \
   --set ingressController.defaultSecretNamespace=kube-system \
   --set ingressController.defaultSecretName=default-cert
kubectl -n kube-system rollout restart deployment/cilium-operator
kubectl -n kube-system rollout restart ds/cilium

Install the latest version of the Cilium CLI. The Cilium CLI can be used to install Cilium, inspect the state of a Cilium installation, and enable/disable various features (e.g. clustermesh, Hubble).

CILIUM_CLI_VERSION=$(curl -s https://raw.githubusercontent.com/cilium/cilium-cli/main/stable.txt)
CLI_ARCH=amd64
if [ "$(uname -m)" = "aarch64" ]; then CLI_ARCH=arm64; fi
curl -L --fail --remote-name-all https://github.com/cilium/cilium-cli/releases/download/${CILIUM_CLI_VERSION}/cilium-linux-${CLI_ARCH}.tar.gz{,.sha256sum}
sha256sum --check cilium-linux-${CLI_ARCH}.tar.gz.sha256sum
sudo tar xzvfC cilium-linux-${CLI_ARCH}.tar.gz /usr/local/bin
rm cilium-linux-${CLI_ARCH}.tar.gz{,.sha256sum}

CILIUM_CLI_VERSION=$(curl -s https://raw.githubusercontent.com/cilium/cilium-cli/main/stable.txt)
CLI_ARCH=amd64
if [ "$(uname -m)" = "arm64" ]; then CLI_ARCH=arm64; fi
curl -L --fail --remote-name-all https://github.com/cilium/cilium-cli/releases/download/${CILIUM_CLI_VERSION}/cilium-darwin-${CLI_ARCH}.tar.gz{,.sha256sum}
shasum -a 256 -c cilium-darwin-${CLI_ARCH}.tar.gz.sha256sum
sudo tar xzvfC cilium-darwin-${CLI_ARCH}.tar.gz /usr/local/bin
rm cilium-darwin-${CLI_ARCH}.tar.gz{,.sha256sum}

Clone the Cilium GitHub repository so that the Cilium CLI can access the latest unreleased Helm chart from the main branch:

git clone git@github.com:cilium/cilium.git
cd cilium

Cilium Ingress Controller can be enabled with the following command:

$ cilium install --chart-directory ./install/kubernetes/cilium \
    --set kubeProxyReplacement=true \
    --set ingressController.enabled=true \
    --set ingressController.defaultSecretNamespace=kube-system \
    --set ingressController.defaultSecretName=default-cert