/
annotations.go
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/
annotations.go
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// Copyright © 2018 Heptio
// 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 dag
import (
"fmt"
"strconv"
"strings"
"k8s.io/api/extensions/v1beta1"
)
const (
// set docs/annotations.md for details of how these annotations
// are applied by Contour.
annotationRequestTimeout = "contour.heptio.com/request-timeout"
annotationWebsocketRoutes = "contour.heptio.com/websocket-routes"
annotationUpstreamProtocol = "contour.heptio.com/upstream-protocol"
annotationMaxConnections = "contour.heptio.com/max-connections"
annotationMaxPendingRequests = "contour.heptio.com/max-pending-requests"
annotationMaxRequests = "contour.heptio.com/max-requests"
annotationMaxRetries = "contour.heptio.com/max-retries"
annotationRetryOn = "contour.heptio.com/retry-on"
annotationNumRetries = "contour.heptio.com/num-retries"
annotationPerTryTimeout = "contour.heptio.com/per-try-timeout"
)
// parseAnnotation parses the annotation map for the supplied key.
// If the value is not present, or malformed, then zero is returned.
func parseAnnotation(annotations map[string]string, annotation string) int {
v, _ := strconv.ParseInt(annotations[annotation], 10, 32)
return int(v)
}
// parseUpstreamProtocols parses the annotations map for a contour.heptio.com/upstream-protocol.{protocol}
// where 'protocol' identifies which protocol must be used in the upstream.
// If the value is not present, or malformed, then an empty map is returned.
func parseUpstreamProtocols(annotations map[string]string, annotation string, protocols ...string) map[string]string {
up := make(map[string]string)
for _, protocol := range protocols {
ports := annotations[fmt.Sprintf("%s.%s", annotation, protocol)]
for _, v := range strings.Split(ports, ",") {
port := strings.TrimSpace(v)
if port != "" {
up[port] = protocol
}
}
}
return up
}
// httpAllowed returns true unless the kubernetes.io/ingress.allow-http annotation is
// present and set to false.
func httpAllowed(i *v1beta1.Ingress) bool {
return !(i.Annotations["kubernetes.io/ingress.allow-http"] == "false")
}
// tlsRequired returns true if the ingress.kubernetes.io/force-ssl-redirect annotation is
// present and set to true.
func tlsRequired(i *v1beta1.Ingress) bool {
return i.Annotations["ingress.kubernetes.io/force-ssl-redirect"] == "true"
}
func websocketRoutes(i *v1beta1.Ingress) map[string]bool {
routes := make(map[string]bool)
for _, v := range strings.Split(i.Annotations[annotationWebsocketRoutes], ",") {
route := strings.TrimSpace(v)
if route != "" {
routes[route] = true
}
}
return routes
}
// getIngressClassAnnotation checks for the acceptable ingress class annotations
// 1. contour.heptio.com/ingress.class
// 2. kubernetes.io/ingress.class
//
// it returns the first matching ingress annotation (in the above order) with test
func getIngressClassAnnotation(annotations map[string]string) string {
class, ok := annotations["contour.heptio.com/ingress.class"]
if ok {
return class
}
class, ok = annotations["kubernetes.io/ingress.class"]
if ok {
return class
}
return ""
}