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healthcheck.go
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healthcheck.go
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// Copyright Project Contour Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package v3
import (
"time"
envoy_config_core_v3 "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
envoy_type_v3 "github.com/envoyproxy/go-control-plane/envoy/type/v3"
"google.golang.org/protobuf/types/known/durationpb"
"github.com/projectcontour/contour/internal/dag"
"github.com/projectcontour/contour/internal/envoy"
"github.com/projectcontour/contour/internal/protobuf"
)
// httpHealthCheck returns a *envoy_config_core_v3.HealthCheck value for HTTP Routes
func httpHealthCheck(cluster *dag.Cluster) *envoy_config_core_v3.HealthCheck {
hc := cluster.HTTPHealthCheckPolicy
host := envoy.HCHost
if hc.Host != "" {
host = hc.Host
}
return &envoy_config_core_v3.HealthCheck{
Timeout: durationOrDefault(hc.Timeout, envoy.HCTimeout),
Interval: durationOrDefault(hc.Interval, envoy.HCInterval),
UnhealthyThreshold: protobuf.UInt32OrDefault(hc.UnhealthyThreshold, envoy.HCUnhealthyThreshold),
HealthyThreshold: protobuf.UInt32OrDefault(hc.HealthyThreshold, envoy.HCHealthyThreshold),
HealthChecker: &envoy_config_core_v3.HealthCheck_HttpHealthCheck_{
HttpHealthCheck: &envoy_config_core_v3.HealthCheck_HttpHealthCheck{
Path: hc.Path,
Host: host,
CodecClientType: codecClientType(cluster),
ExpectedStatuses: expectedStatuses(hc.ExpectedStatuses),
},
},
}
}
func expectedStatuses(statusRanges []dag.HTTPStatusRange) []*envoy_type_v3.Int64Range {
if len(statusRanges) == 0 {
return nil
}
var res []*envoy_type_v3.Int64Range
for _, statusRange := range statusRanges {
res = append(res, &envoy_type_v3.Int64Range{
Start: statusRange.Start,
End: statusRange.End,
})
}
return res
}
// tcpHealthCheck returns a *envoy_config_core_v3.HealthCheck value for TCPProxies
func tcpHealthCheck(cluster *dag.Cluster) *envoy_config_core_v3.HealthCheck {
hc := cluster.TCPHealthCheckPolicy
return &envoy_config_core_v3.HealthCheck{
Timeout: durationOrDefault(hc.Timeout, envoy.HCTimeout),
Interval: durationOrDefault(hc.Interval, envoy.HCInterval),
UnhealthyThreshold: protobuf.UInt32OrDefault(hc.UnhealthyThreshold, envoy.HCUnhealthyThreshold),
HealthyThreshold: protobuf.UInt32OrDefault(hc.HealthyThreshold, envoy.HCHealthyThreshold),
HealthChecker: &envoy_config_core_v3.HealthCheck_TcpHealthCheck_{
TcpHealthCheck: &envoy_config_core_v3.HealthCheck_TcpHealthCheck{},
},
}
}
func durationOrDefault(d, def time.Duration) *durationpb.Duration {
if d != 0 {
return durationpb.New(d)
}
return durationpb.New(def)
}
func codecClientType(cluster *dag.Cluster) envoy_type_v3.CodecClientType {
if cluster.Protocol == "h2" || cluster.Protocol == "h2c" {
return envoy_type_v3.CodecClientType_HTTP2
}
return envoy_type_v3.CodecClientType_HTTP1
}