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faster matching of known services

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We hit this code *a lot* during rendering.
This commit is contained in:
Matthias Radestock
2017-06-18 16:02:34 +01:00
parent 8c0c20f289
commit 0d0414d348
1 changed files with 19 additions and 33 deletions
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52
render/theinternet.go
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@@ -3,6 +3,7 @@ package render
import (
"net"
"regexp"
"strings"
"github.com/weaveworks/scope/probe/host"
"github.com/weaveworks/scope/report"
@@ -12,46 +13,31 @@ var (
// ServiceNodeIDPrefix is how the ID of all service pseudo nodes begin
ServiceNodeIDPrefix = "service-"
knownServiceMatchers = []*regexp.Regexp{
// See http://docs.aws.amazon.com/general/latest/gr/rande.html for fainer grained
// details
regexp.MustCompile(`^.+\.amazonaws\.com$`),
regexp.MustCompile(`^.+\.googleapis\.com$`),
regexp.MustCompile(`^.+\.core\.windows\.net$`), // Azure Storage - Blob, Tables, Files & Queues
regexp.MustCompile(`^.+\.servicebus\.windows\.net$`), // Azure Service Bus
regexp.MustCompile(`^.+\.azure-api\.net$`), // Azure API Management
regexp.MustCompile(`^.+\.onmicrosoft\.com$`), // Azure Active Directory
regexp.MustCompile(`^.+\.cloudapp\.azure\.com$`), // Azure IaaS
regexp.MustCompile(`^.+\.database\.windows\.net$`), // Azure SQL DB
regexp.MustCompile(`^.+\.documents\.azure\.com$`), // Azure DocumentDB/CosmosDB
}
knownServiceMatcher = regexp.MustCompile(`^.+\.(` + strings.Join([]string{
// See http://docs.aws.amazon.com/general/latest/gr/rande.html
// for finer grained details
`amazonaws\.com`,
`googleapis\.com`,
`core\.windows\.net`, // Azure Storage - Blob, Tables, Files & Queues
`servicebus\.windows\.net`, // Azure Service Bus
`azure-api\.net`, // Azure API Management
`onmicrosoft\.com`, // Azure Active Directory
`cloudapp\.azure\.com`, // Azure IaaS
`database\.windows\.net`, // Azure SQL DB
`documents\.azure\.com`, // Azure DocumentDB/CosmosDB
}, `|`) + `)$`)
knownServiceExcluders = []*regexp.Regexp{
knownServiceExcluder = regexp.MustCompile(`^(` + strings.Join([]string{
// We exclude ec2 machines because they are too generic
// and having separate nodes for them makes visualizations worse
regexp.MustCompile(`^ec2.*\.amazonaws\.com$`),
}
`ec2.*\.amazonaws\.com`,
}, `|`) + `)$`)
)
// TODO: Make it user-customizable https://github.com/weaveworks/scope/issues/1876
// NB: this is a hotspot in rendering performance.
func isKnownService(hostname string) bool {
foundMatch := false
for _, matcher := range knownServiceMatchers {
if matcher.MatchString(hostname) {
foundMatch = true
break
}
}
if !foundMatch {
return false
}
for _, excluder := range knownServiceExcluders {
if excluder.MatchString(hostname) {
return false
}
}
return true
return knownServiceMatcher.MatchString(hostname) && !knownServiceExcluder.MatchString(hostname)
}
// LocalNetworks returns a superset of the networks (think: CIDRs) that are