Ambassador Edge Stack enables you to control timeouts in several different ways.
timeout_ms is the end-to-end timeout for an entire user-level transaction in milliseconds. It begins after the full incoming request is received up until the full response stream is returned to the client. This timeout includes all retries. It can be disabled by setting the value to
idle_timeout_ms controls how long a connection should remain open when no traffic is being sent through the connection.
idle_timeout_ms is distinct from
timeout_ms, as the idle timeout applies on either down or upstream request events and is reset every time an encode/decode event occurrs or data is processed for the stream.
idle_timeout_ms operates on a per-route basis and will overwrite behavior of the
cluster_idle_timeout_ms. If not set, Ambassador Edge Stack will default to the value set by
cluster_idle_timeout_ms. It can be disabled by setting the value to
Cluster max connection lifetime:
cluster_max_connection_lifetime_ms controls how long upstream connections should remain open, regardless of whether traffic is currently being sent through it or not. By setting this value, you can control how long Envoy will hold open healthy connections to upstream services before it is forced to recreate them, providing natural connection churn. This helps in situations where the upstream cluster is represented by a service discovery mechanism that requires new connections in order to discover new backends. In particular, this helps with Kubernetes Service-based routing where the set of upstream Endpoints changes, either naturally due to pod scale up or explicitly because the label selector changed.
Cluster idle timeout:
cluster_idle_timeout_ms controls how long a connection stream will remain open if there are no active requests. This timeout operates based on outgoing requests to upstream services. It can be disabled by setting the value to
3600000 (1 hour).
connect_timeout_ms sets the connection-level timeout for Ambassador Edge Stack to an upstream service at the network layer. This timeout runs until Ambassador Edge Stack can verify that a TCP connection has been established, including the TLS handshake. This timeout cannot be disabled.
Listener idle timeout:
listener_idle_timeout_ms configures the
in the Envoy HTTP Connection Manager and controls how long a connection from the
downstream client to Ambassador Edge Stack will remain open if there are no active
requests. Only full requests will be counted towards this timeout so clients
sending TCP keepalives will not guarantee a connection remains open. This
timeout It can be disabled by setting the value to
3600000 (1 hour)
Caution Disabling this timeout increases the likelihood of stream leaks due to missed FINs in the TCP connection.
The various timeouts are applied to a Mapping resource and can be combined.