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To create a self-signed certificate for testing, follow these OpenSSL commands: # Generate private key openssl genrsa -des3 -out private.key 2048 openssl rsa -in private.key -out private.key # Create certificate authority openssl req -new -x509 -key private.key -out rootCA.pem -days 3650 # Generate certificate signing request openssl req -new ...

When etcd TLS certificates expire, the Kubernetes control plane becomes unstable—API server failures, kubelet connection drops, and cluster-wide unresponsiveness commonly follow. This guide outlines a safe, coordinated procedure to renew etcd’s certificate authority (CA) and member certificates across a multi-node etcd cluster without data loss ...