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Signed-off-by: Tamal Saha <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| /* | ||
| Copyright AppsCode Inc. and Contributors | ||
| 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 cluster | ||
|
|
||
| import ( | ||
| "crypto/tls" | ||
| "crypto/x509" | ||
| "fmt" | ||
| "net" | ||
| "net/http" | ||
| "strings" | ||
| "time" | ||
|
|
||
| kmapi "kmodules.xyz/client-go/api/v1" | ||
|
|
||
| "k8s.io/client-go/rest" | ||
| ) | ||
|
|
||
| const ( | ||
| aksDomain = ".azmk8s.io" | ||
| eksDomain = ".eks.amazonaws.com" | ||
| gkeDomain = ".gke.com" | ||
| exoscaleDomain = ".exo.io" | ||
| doDomain = ".k8s.ondigitalocean.com" | ||
| lkeDomain = ".linodelke.net" | ||
| scalewayDomain = ".scw.cloud" | ||
| vultrDomain = ".vultr-k8s.com" | ||
| ) | ||
|
|
||
| func APIServerCertificate(cfg *rest.Config) (*x509.Certificate, error) { | ||
| err := rest.LoadTLSFiles(cfg) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| // create ca cert pool | ||
| caCertPool := x509.NewCertPool() | ||
| ok := caCertPool.AppendCertsFromPEM(cfg.CAData) | ||
| if !ok { | ||
| return nil, fmt.Errorf("can't append caCert to caCertPool") | ||
| } | ||
|
|
||
| tr := &http.Transport{ | ||
| Proxy: http.ProxyFromEnvironment, | ||
| DialContext: (&net.Dialer{ | ||
| Timeout: 30 * time.Second, | ||
| KeepAlive: 30 * time.Second, | ||
| }).DialContext, | ||
| MaxIdleConns: 100, | ||
| IdleConnTimeout: 90 * time.Second, | ||
| TLSHandshakeTimeout: 10 * time.Second, | ||
| ExpectContinueTimeout: 1 * time.Second, | ||
| TLSClientConfig: &tls.Config{RootCAs: caCertPool}, | ||
| } | ||
| client := &http.Client{Transport: tr} | ||
|
|
||
| resp, err := client.Get(cfg.Host) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| for i := range resp.TLS.VerifiedChains { | ||
| return resp.TLS.VerifiedChains[i][0], nil | ||
| } | ||
| return nil, fmt.Errorf("no cert found") | ||
| } | ||
|
|
||
| func DetectProvider(cfg *rest.Config) (kmapi.HostingProvider, error) { | ||
| crt, err := APIServerCertificate(cfg) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
|
|
||
| for _, host := range crt.DNSNames { | ||
| if strings.HasSuffix(host, eksDomain) { | ||
| return kmapi.HostingProviderAWS, nil | ||
| } else if strings.HasSuffix(host, aksDomain) { | ||
| return kmapi.HostingProviderAzure, nil | ||
| } else if strings.HasSuffix(host, doDomain) { | ||
| return kmapi.HostingProviderDigitalOcean, nil | ||
| } else if strings.HasSuffix(host, exoscaleDomain) { | ||
| return kmapi.HostingProviderExoscale, nil | ||
| } else if strings.HasSuffix(host, gkeDomain) { | ||
| return kmapi.HostingProviderGoogleCloud, nil | ||
| } else if strings.HasSuffix(host, lkeDomain) { | ||
| return kmapi.HostingProviderLinode, nil | ||
| } else if strings.HasSuffix(host, scalewayDomain) { | ||
| return kmapi.HostingProviderScaleway, nil | ||
| } else if strings.HasSuffix(host, vultrDomain) { | ||
| return kmapi.HostingProviderVultr, nil | ||
| } | ||
| } | ||
| return "", nil | ||
| } |
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