Envoy is a high-performance open-source edge and service proxy designed for cloud-native applications. It is often used to manage microservices traffic, providing features like load balancing, service discovery, and observability. Envoy is a critical component in service mesh architectures and is widely adopted for its flexibility and performance.
When an SSL certificate expires, Envoy will fail to establish secure connections, leading to errors in communication between services. This can manifest as connection failures, security warnings, or service downtime. Developers may notice error logs indicating SSL handshake failures or certificate validation errors.
SSL certificates are crucial for establishing secure connections over the internet. They have a validity period, after which they expire and must be renewed. An expired SSL certificate means that the identity of the server can no longer be verified, leading to security risks and communication breakdowns.
Certificates expire to ensure that encryption standards are regularly updated and that the certificate holder's identity is periodically verified. This helps maintain a secure and trustworthy internet environment.
To resolve the issue of an expired SSL certificate in Envoy, follow these steps:
Contact your certificate authority (CA) to renew your SSL certificate. You can also use tools like Let's Encrypt to obtain a free SSL certificate.
Once you have the new certificate, update your Envoy configuration to use it. Locate the tls_context section in your Envoy configuration file and update the paths to the new certificate and private key files.
static_resources:
listeners:
- name: listener_0
address:
socket_address: { address: 0.0.0.0, port_value: 443 }
filter_chains:
- filters:
- name: envoy.filters.network.http_connection_manager
config:
codec_type: AUTO
stat_prefix: ingress_http
route_config:
name: local_route
virtual_hosts:
- name: local_service
domains: ["*"]
routes:
- match: { prefix: "/" }
route: { cluster: service }
http_filters:
- name: envoy.filters.http.router
transport_socket:
name: envoy.transport_sockets.tls
typed_config:
"@type": type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.DownstreamTlsContext
common_tls_context:
tls_certificates:
- certificate_chain: { filename: "/path/to/new/cert.pem" }
private_key: { filename: "/path/to/new/key.pem" }
After updating the configuration, restart the Envoy service to apply the changes. Use the following command:
sudo systemctl restart envoy
By renewing your SSL certificate and updating the Envoy configuration, you can resolve the SSL certificate expired issue and restore secure communication between services. Regularly monitoring certificate expiration dates and automating renewals can help prevent similar issues in the future.
For more information on managing SSL certificates in Envoy, visit the Envoy Documentation.
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