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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| package km_aws | ||
|
|
||
| import ( | ||
| cluster "kubemux/lib/cloud_provider" | ||
| "os/exec" | ||
| "regexp" | ||
|
|
||
| clientcmdapi "k8s.io/client-go/tools/clientcmd/api" | ||
|
|
||
| "github.com/Masterminds/semver" | ||
| log "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| type AuthType int | ||
|
|
||
| const ( | ||
| useAWSCLI AuthType = iota | ||
| useIAMAuthenticator | ||
| ) | ||
| const ( | ||
| commandAWScli = "aws" | ||
| commandIAMAuthenticator = "aws-iam-authenticator" | ||
| ) | ||
|
|
||
| var ( | ||
| commands = map[AuthType]string{ | ||
| useAWSCLI: commandAWScli, | ||
| useIAMAuthenticator: commandIAMAuthenticator, | ||
| } | ||
|
|
||
| awsCLIVersionCommand = []string{"aws", "--version"} | ||
| ) | ||
|
|
||
| func getAuthType() AuthType { | ||
| // According to the docs the first version that supports this is 1.18.17 | ||
| // See: https://docs.aws.amazon.com/eks/latest/userguide/create-kubeconfig.html | ||
| // but looking at the source code the get token is present from 1.16.266 | ||
| // See: https://github.com/aws/aws-cli/commits/develop/awscli/customizations/eks/get_token.py | ||
| pivotVersion, _ := semver.NewVersion("1.16.266") | ||
| currentVersion := getAWSCLIversion(awsCLIVersionCommand) | ||
| if currentVersion.LessThan(pivotVersion) { | ||
| return useIAMAuthenticator | ||
| } | ||
| return useAWSCLI | ||
| } | ||
|
|
||
| func getAWSCLIversion(cmd []string) *semver.Version { | ||
| v, _ := semver.NewVersion("0.0.0") | ||
| command := exec.Command(cmd[0], cmd[1:]...) //nolint:gosec | ||
| out, err := command.Output() | ||
| if err != nil { | ||
| log.Warn("Can't get aws cli tool version") | ||
| return v | ||
| } | ||
| r := regexp.MustCompile(`aws-cli\/(?P<version>[0-9]+\.[0-9]+\.[0-9]+)`) | ||
| if match := r.FindStringSubmatch(string(out)); len(match) != 0 { | ||
| v, _ = semver.NewVersion(match[1]) | ||
| log.WithFields(log.Fields{ | ||
| "version": v, | ||
| }).Info("Found AWS CLI version") | ||
| } | ||
| return v | ||
| } | ||
|
|
||
| const ( | ||
| clientAPIVersion = "client.authentication.k8s.io/v1beta1" | ||
| ) | ||
|
|
||
| var ( | ||
| options = map[AuthType][]string{ | ||
| useAWSCLI: {"eks", "get-token", "--cluster-name"}, | ||
| useIAMAuthenticator: {"token", "-i"}, | ||
| } | ||
| ) | ||
|
|
||
| func getConfigAuthInfo(cls *cluster.Cluster, authType AuthType) *clientcmdapi.AuthInfo { | ||
| authInfo := clientcmdapi.NewAuthInfo() | ||
| args := make([]string, len(options[authType])) | ||
| copy(args, options[authType]) | ||
| args = append(args, cls.Name, "--region", cls.Region) | ||
|
|
||
| authInfo.Exec = &clientcmdapi.ExecConfig{ | ||
| Command: commands[authType], | ||
| Args: args, | ||
| APIVersion: clientAPIVersion} | ||
| return authInfo | ||
| } |