open-consul/agent/xds/config.go

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package xds
import (
"strings"
"github.com/mitchellh/mapstructure"
)
// ProxyConfig describes the keys we understand from Connect.Proxy.Config. Note
// that this only includes config keys that affects runtime config delivered by
// xDS. For Envoy config keys that affect bootstrap generation see
// command/connect/envoy/bootstrap_config.go.
type ProxyConfig struct {
// PublicListenerJSON is a complete override ("escape hatch") for the
// upstream's public listener. The Connect server TLS certificate and
// validation context will be injected overriding any TLS settings present. An
// AuthZ filter will also be prepended to each filterChain provided to enforce
// Connect's access control.
PublicListenerJSON string `mapstructure:"envoy_public_listener_json"`
// LocalClusterJSON is a complete override ("escape hatch") for the
// local application cluster.
LocalClusterJSON string `mapstructure:"envoy_local_cluster_json"`
// LocalConnectTimeoutMs is the number of milliseconds to timeout making a new
// connection to the local app instance. Defaults to 5000 (5 seconds) if not
// set.
LocalConnectTimeoutMs int `mapstructure:"local_connect_timeout_ms"`
// Protocol describes the service's protocol. Valid values are "tcp",
// "http" and "grpc". Anything else is treated as tcp. The enables protocol
// aware features like per-request metrics and connection pooling, tracing,
// routing etc.
Protocol string `mapstructure:"protocol"`
}
// ParseProxyConfig returns the ProxyConfig parsed from the an opaque map. If an
// error occurs during parsing it is returned along with the default config this
// allows caller to choose whether and how to report the error.
func ParseProxyConfig(m map[string]interface{}) (ProxyConfig, error) {
var cfg ProxyConfig
err := mapstructure.WeakDecode(m, &cfg)
// Set defaults (even if error is returned)
if cfg.Protocol == "" {
cfg.Protocol = "tcp"
} else {
cfg.Protocol = strings.ToLower(cfg.Protocol)
}
if cfg.LocalConnectTimeoutMs < 1 {
cfg.LocalConnectTimeoutMs = 5000
}
return cfg, err
}
// UpstreamConfig describes the keys we understand from
// Connect.Proxy.Upstream[*].Config.
type UpstreamConfig struct {
// ListenerJSON is a complete override ("escape hatch") for the upstream's
// listener.
ListenerJSON string `mapstructure:"envoy_listener_json"`
// ClusterJSON is a complete override ("escape hatch") for the upstream's
// cluster. The Connect client TLS certificate and context will be injected
// overriding any TLS settings present.
ClusterJSON string `mapstructure:"envoy_cluster_json"`
// Protocol describes the upstream's service protocol. Valid values are "tcp",
// "http" and "grpc". Anything else is treated as tcp. The enables protocol
// aware features like per-request metrics and connection pooling, tracing,
// routing etc.
Protocol string `mapstructure:"protocol"`
// ConnectTimeoutMs is the number of milliseconds to timeout making a new
// connection to this upstream. Defaults to 5000 (5 seconds) if not set.
ConnectTimeoutMs int `mapstructure:"connect_timeout_ms"`
}
// ParseUpstreamConfig returns the UpstreamConfig parsed from the an opaque map.
// If an error occurs during parsing it is returned along with the default
// config this allows caller to choose whether and how to report the error.
func ParseUpstreamConfig(m map[string]interface{}) (UpstreamConfig, error) {
var cfg UpstreamConfig
err := mapstructure.WeakDecode(m, &cfg)
// Set defaults (even if error is returned)
if cfg.Protocol == "" {
cfg.Protocol = "tcp"
} else {
cfg.Protocol = strings.ToLower(cfg.Protocol)
}
if cfg.ConnectTimeoutMs < 1 {
cfg.ConnectTimeoutMs = 5000
}
return cfg, err
}