open-consul/agent/xds/envoy_versioning.go

84 lines
2.1 KiB
Go

package xds
import (
"fmt"
"regexp"
envoycore "github.com/envoyproxy/go-control-plane/envoy/api/v2/core"
"github.com/hashicorp/go-version"
)
var (
// minSafeRegexVersion reflects the minimum version where we could use safe_regex instead of regex
//
// NOTE: the first version that no longer supported the old style was 1.13.0
minSafeRegexVersion = version.Must(version.NewVersion("1.11.2"))
)
type supportedProxyFeatures struct {
RouterMatchSafeRegex bool // use safe_regex instead of regex in http.router rules
}
func determineSupportedProxyFeatures(node *envoycore.Node) supportedProxyFeatures {
version := determineEnvoyVersionFromNode(node)
if version == nil {
return supportedProxyFeatures{}
}
return supportedProxyFeatures{
RouterMatchSafeRegex: !version.LessThan(minSafeRegexVersion),
}
}
// example: 1580db37e9a97c37e410bad0e1507ae1a0fd9e77/1.12.4/Clean/RELEASE/BoringSSL
var buildVersionPattern = regexp.MustCompile(`^[a-f0-9]{40}/([^/]+)/Clean/RELEASE/BoringSSL$`)
func determineEnvoyVersionFromNode(node *envoycore.Node) *version.Version {
if node == nil {
return nil
}
if node.UserAgentVersionType == nil {
if node.BuildVersion == "" {
return nil
}
// Must be an older pre-1.13 envoy
m := buildVersionPattern.FindStringSubmatch(node.BuildVersion)
if m == nil {
return nil
}
return version.Must(version.NewVersion(m[1]))
}
if node.UserAgentName != "envoy" {
return nil
}
bv, ok := node.UserAgentVersionType.(*envoycore.Node_UserAgentBuildVersion)
if !ok {
// NOTE: we could sniff for *envoycore.Node_UserAgentVersion and do more regex but official builds don't have this problem.
return nil
}
if bv.UserAgentBuildVersion == nil {
return nil
}
v := bv.UserAgentBuildVersion.Version
return version.Must(version.NewVersion(
fmt.Sprintf("%d.%d.%d",
v.GetMajorNumber(),
v.GetMinorNumber(),
v.GetPatch(),
),
))
}
func determineSupportedProxyFeaturesFromString(vs string) supportedProxyFeatures {
version := version.Must(version.NewVersion(vs))
return supportedProxyFeatures{
RouterMatchSafeRegex: !version.LessThan(minSafeRegexVersion),
}
}