istio

const (
	// MaxConnectionDuration is the maximum duration of a connection in seconds. It is set to 24 hours (86400 seconds) to prevent issues with expiring client certificates.
	MaxConnectionDuration = 86400

	// TCPKeepaliveTime is the duration in seconds a connection needs to be idle before TCP keepalive probes are sent.
	TCPKeepaliveTime = 60
	// TCPKeepaliveInterval is the duration in seconds between individual TCP keepalive probes.
	TCPKeepaliveInterval = 30
	// TCPKeepaliveProbes is the number of TCP keepalive probes to send before considering the connection dead.
	// => After 60s + 30s * 5 = 210s (3.5 minutes) of idle time without answers to the keepalive probes, the connection will be considered dead and closed.
	// Values are chosen between the kubernetes client and server defaults, which are between 30s and 120s for the TCPKeepaliveTime and unspecified
	// TCPKeepaliveInterval and TCPKeepaliveProbes.
	// client: https://github.com/kubernetes/kubernetes/blob/b264d0913501e614a75eb021a0e2578ee12d0281/staging/src/k8s.io/client-go/transport/cache.go#L123
	// server: https://github.com/kubernetes/kubernetes/blob/b264d0913501e614a75eb021a0e2578ee12d0281/staging/src/k8s.io/apiserver/pkg/server/secure_serving.go#L288
	TCPKeepaliveProbes = 5

	// HTTP2ConnectionKeepaliveInterval is the interval between HTTP/2 keepalive PING frames sent on upstream (todo: check) connections.
	HTTP2ConnectionKeepaliveInterval = "30s"
	// HTTP2ConnectionKeepaliveTimeout is the timeout after which an unacknowledged HTTP/2 keepalive PING causes the connection to be closed.
	// => At the latest after 45s (earliest after 15s) of unsanswered pings, the connection will be considered dead and closed.
	// Values chosen in line with the kubernetes client defaults:
	// https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/apimachinery/pkg/util/net/http.go#L178
	HTTP2ConnectionKeepaliveTimeout = "15s"
)