open-consul/agent/xds/config.go

168 lines
6.3 KiB
Go

package xds
import (
envoy_cluster_v3 "github.com/envoyproxy/go-control-plane/envoy/config/cluster/v3"
"strings"
"github.com/golang/protobuf/ptypes"
"github.com/golang/protobuf/ptypes/wrappers"
"github.com/mitchellh/mapstructure"
"github.com/hashicorp/consul/agent/structs"
"github.com/hashicorp/consul/lib/decode"
)
// 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.
//
// Note: This escape hatch is compatible with the discovery chain.
PublicListenerJSON string `mapstructure:"envoy_public_listener_json"`
// LocalClusterJSON is a complete override ("escape hatch") for the
// local application cluster.
//
// Note: This escape hatch is compatible with the discovery chain.
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"`
// LocalRequestTimeoutMs is the number of milliseconds to timeout HTTP requests
// to the local app instance. If not set, no value is set, Envoy defaults are
// respected (15s)
LocalRequestTimeoutMs *int `mapstructure:"local_request_timeout_ms"`
// Protocol describes the service's protocol. Valid values are "tcp",
// "http" and "grpc". Anything else is treated as tcp. This enables
// protocol aware features like per-request metrics and connection
// pooling, tracing, routing etc.
Protocol string `mapstructure:"protocol"`
// BindAddress overrides the address the proxy's listener binds to. This
// enables proxies in network namespaces to bind to a different address
// than the host address.
BindAddress string `mapstructure:"bind_address"`
// BindPort overrides the port the proxy's listener binds to. This
// enable proxies in network namespaces to bind to a different port
// than the host port being advertised.
BindPort int `mapstructure:"bind_port"`
}
// 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
decodeConf := &mapstructure.DecoderConfig{
DecodeHook: mapstructure.ComposeDecodeHookFunc(
decode.HookWeakDecodeFromSlice,
decode.HookTranslateKeys,
),
Result: &cfg,
WeaklyTypedInput: true,
}
decoder, err := mapstructure.NewDecoder(decodeConf)
if err != nil {
return cfg, err
}
if err := decoder.Decode(m); err != nil {
return cfg, err
}
// 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
}
type GatewayConfig struct {
// BindTaggedAddresses when set will cause all of the services tagged
// addresses to have listeners bound to them in addition to the main service
// address listener. This is only suitable when the tagged addresses are IP
// addresses of network interfaces Envoy can see. i.e. When using DNS names
// for those addresses or where an external entity maps that IP to the Envoy
// (like AWS EC2 mapping a public IP to the private interface) then this
// cannot be used. See the BindAddresses config instead
BindTaggedAddresses bool `mapstructure:"envoy_gateway_bind_tagged_addresses" alias:"envoy_mesh_gateway_bind_tagged_addresses"`
// BindAddresses additional bind addresses to configure listeners for
BindAddresses map[string]structs.ServiceAddress `mapstructure:"envoy_gateway_bind_addresses" alias:"envoy_mesh_gateway_bind_addresses"`
// NoDefaultBind indicates that we should not bind to the default address of the
// gateway service
NoDefaultBind bool `mapstructure:"envoy_gateway_no_default_bind" alias:"envoy_mesh_gateway_no_default_bind"`
// DNSDiscoveryType indicates the DNS service discovery type.
// See: https://www.envoyproxy.io/docs/envoy/latest/intro/arch_overview/upstream/service_discovery#arch-overview-service-discovery-types
DNSDiscoveryType string `mapstructure:"envoy_dns_discovery_type"`
// 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"`
}
// ParseGatewayConfig returns the GatewayConfig parsed from an opaque map. If an
// error occurs during parsing, it is returned along with the default config. This
// allows the caller to choose whether and how to report the error
func ParseGatewayConfig(m map[string]interface{}) (GatewayConfig, error) {
var cfg GatewayConfig
d, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
DecodeHook: mapstructure.ComposeDecodeHookFunc(
decode.HookWeakDecodeFromSlice,
decode.HookTranslateKeys,
),
Result: &cfg,
WeaklyTypedInput: true,
})
if err != nil {
return cfg, err
}
if err := d.Decode(m); err != nil {
return cfg, err
}
if cfg.ConnectTimeoutMs < 1 {
cfg.ConnectTimeoutMs = 5000
}
cfg.DNSDiscoveryType = strings.ToLower(cfg.DNSDiscoveryType)
return cfg, err
}
// Return an envoy.OutlierDetection populated by the values from this struct.
// If all values are zero a default empty OutlierDetection will be returned to
// enable outlier detection with default values.
func ToOutlierDetection(p *structs.PassiveHealthCheck) *envoy_cluster_v3.OutlierDetection {
od := &envoy_cluster_v3.OutlierDetection{}
if p == nil {
return od
}
if p.Interval != 0 {
od.Interval = ptypes.DurationProto(p.Interval)
}
if p.MaxFailures != 0 {
od.Consecutive_5Xx = &wrappers.UInt32Value{Value: p.MaxFailures}
}
return od
}