From c8af84ed326e96208b6d5cf1938814e6a24a8c0c Mon Sep 17 00:00:00 2001 From: Neeraj Kashyap Date: Tue, 22 Oct 2024 13:15:29 -0700 Subject: [PATCH 1/2] Added "kubescret" provider... Also removed concept of plugin initializer -- that's already handled by `init()` methods. --- aws_ssm.go | 2 +- env.go | 2 +- envfile.go | 2 +- go.mod | 60 ++++++++++++++++- go.sum | 153 ++++++++++++++++++++++++++++++++++++++++-- kubernetes/secrets.go | 1 + kubesecret.go | 98 +++++++++++++++++++++++++++ plugins.go | 14 +--- process_linux.go | 2 +- 9 files changed, 310 insertions(+), 24 deletions(-) create mode 100644 kubernetes/secrets.go create mode 100644 kubesecret.go diff --git a/aws_ssm.go b/aws_ssm.go index 9c913b6..168e284 100644 --- a/aws_ssm.go +++ b/aws_ssm.go @@ -34,5 +34,5 @@ func AWSSystemsManagerParameterStoreProvider(filter string) (map[string]string, func init() { helpString := "Provides environment variables defined in AWS Systems Manager Parameter Store." - RegisterPlugin("aws_ssm", helpString, noop, AWSSystemsManagerParameterStoreProvider) + RegisterPlugin("aws_ssm", helpString, AWSSystemsManagerParameterStoreProvider) } diff --git a/env.go b/env.go index c8a992e..3900d1a 100644 --- a/env.go +++ b/env.go @@ -23,5 +23,5 @@ func CurrentEnvProvider(filter string) (map[string]string, error) { func init() { helpString := "Provides the environment variables defined in the checkenv process." - RegisterPlugin("env", helpString, noop, CurrentEnvProvider) + RegisterPlugin("env", helpString, CurrentEnvProvider) } diff --git a/envfile.go b/envfile.go index 07cba39..5652e25 100644 --- a/envfile.go +++ b/envfile.go @@ -36,5 +36,5 @@ func EnvFileProvider(filter string) (map[string]string, error) { func init() { helpString := "Provides the environment variables defined in the env file with the given path." - RegisterPlugin("file", helpString, noop, EnvFileProvider) + RegisterPlugin("file", helpString, EnvFileProvider) } diff --git a/go.mod b/go.mod index f2e9111..3ba23cb 100644 --- a/go.mod +++ b/go.mod @@ -1,9 +1,65 @@ module github.com/bugout-dev/checkenv -go 1.16 +go 1.22.0 + +toolchain go1.22.8 require ( - github.com/aws/aws-sdk-go-v2 v1.11.2 github.com/aws/aws-sdk-go-v2/config v1.11.0 github.com/aws/aws-sdk-go-v2/service/ssm v1.17.1 + k8s.io/client-go v0.31.1 +) + +require ( + github.com/aws/aws-sdk-go-v2 v1.11.2 // indirect + github.com/aws/aws-sdk-go-v2/credentials v1.6.4 // indirect + github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.8.2 // indirect + github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.2 // indirect + github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.0.2 // indirect + github.com/aws/aws-sdk-go-v2/internal/ini v1.3.2 // indirect + github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.5.2 // indirect + github.com/aws/aws-sdk-go-v2/service/sso v1.6.2 // indirect + github.com/aws/aws-sdk-go-v2/service/sts v1.11.1 // indirect + github.com/aws/smithy-go v1.9.0 // indirect + github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect + github.com/emicklei/go-restful/v3 v3.11.0 // indirect + github.com/fxamacker/cbor/v2 v2.7.0 // indirect + github.com/go-logr/logr v1.4.2 // indirect + github.com/go-openapi/jsonpointer v0.19.6 // indirect + github.com/go-openapi/jsonreference v0.20.2 // indirect + github.com/go-openapi/swag v0.22.4 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/protobuf v1.5.4 // indirect + github.com/google/gnostic-models v0.6.8 // indirect + github.com/google/go-cmp v0.6.0 // indirect + github.com/google/gofuzz v1.2.0 // indirect + github.com/google/uuid v1.6.0 // indirect + github.com/imdario/mergo v0.3.6 // indirect + github.com/jmespath/go-jmespath v0.4.0 // indirect + github.com/josharian/intern v1.0.0 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/mailru/easyjson v0.7.7 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect + github.com/spf13/pflag v1.0.5 // indirect + github.com/x448/float16 v0.8.4 // indirect + golang.org/x/net v0.26.0 // indirect + golang.org/x/oauth2 v0.21.0 // indirect + golang.org/x/sys v0.21.0 // indirect + golang.org/x/term v0.21.0 // indirect + golang.org/x/text v0.16.0 // indirect + golang.org/x/time v0.3.0 // indirect + google.golang.org/protobuf v1.34.2 // indirect + gopkg.in/inf.v0 v0.9.1 // indirect + gopkg.in/yaml.v2 v2.4.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect + k8s.io/api v0.31.1 // indirect + k8s.io/apimachinery v0.31.1 // indirect + k8s.io/klog/v2 v2.130.1 // indirect + k8s.io/kube-openapi v0.0.0-20240228011516-70dd3763d340 // indirect + k8s.io/utils v0.0.0-20240711033017-18e509b52bc8 // indirect + sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect + sigs.k8s.io/structured-merge-diff/v4 v4.4.1 // indirect + sigs.k8s.io/yaml v1.4.0 // indirect ) diff --git a/go.sum b/go.sum index 5acab87..34785dd 100644 --- a/go.sum +++ b/go.sum @@ -22,20 +22,163 @@ github.com/aws/aws-sdk-go-v2/service/sts v1.11.1 h1:QKR7wy5e650q70PFKMfGF9sTo0rZ 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0000000..c5ac2a3 --- /dev/null +++ b/kubesecret.go @@ -0,0 +1,98 @@ +package main + +import ( + "context" + "errors" + "fmt" + "os" + "path/filepath" + "strings" + + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" + "k8s.io/client-go/kubernetes" + "k8s.io/client-go/tools/clientcmd" + "k8s.io/client-go/util/homedir" +) + +func KubernetesSecretProvider(filter string) (map[string]string, error) { + var kubeconfig string + var namespace string + var secret string + + vars := map[string]string{} + + filterStrings := strings.Split(filter, "+") + for _, filterString := range filterStrings { + components := strings.Split(filterString, ":") + k := components[0] + v := strings.Join(components[1:], ":") + switch k { + case "kubeconfig": + // TODO(zomglings): "+" is a valid symbol in file/directory names. The current way of separating args using "+" is not robust. + kubeconfig = v + case "namespace": + namespace = v + case "secret": + secret = v + } + } + + if kubeconfig == "" { + if home := homedir.HomeDir(); home != "" { + defaultConfig := filepath.Join(home, ".kube", "config") + defaultConfigStat, defaultConfigErr := os.Stat(defaultConfig) + if defaultConfigErr != nil { + return vars, fmt.Errorf("kubeconfig not provided and default kubeconfig (%s) not found", defaultConfig) + } + if defaultConfigStat.IsDir() { + return vars, fmt.Errorf("kubeconfig not provided and default kubeconfig (%s) is a directory", defaultConfig) + } + } + } + + if kubeconfig == "" { + return vars, errors.New("kubeconfig not provided") + } + + config, err := clientcmd.BuildConfigFromFlags("", kubeconfig) + if err != nil { + panic(err.Error()) + } + + // create the clientset + clientset, err := kubernetes.NewForConfig(config) + if err != nil { + panic(err.Error()) + } + + secretsClient := clientset.CoreV1().Secrets(namespace) + + ctx := context.Background() + + if secret != "" { + secretResource, secretResourceErr := secretsClient.Get(ctx, secret, metav1.GetOptions{}) + if secretResourceErr != nil { + return vars, secretResourceErr + } + for key, value := range secretResource.Data { + vars[key] = string(value) + } + } else { + secretResources, secretResourcesErr := secretsClient.List(ctx, metav1.ListOptions{}) + if secretResourcesErr != nil { + return vars, secretResourcesErr + } + for _, item := range secretResources.Items { + for key, value := range item.Data { + vars[key] = string(value) + } + } + } + + return vars, nil +} + +func init() { + helpString := "Provides variables defined in secrets on a Kubernetes cluster, filterable by namespace and by secret name." + RegisterPlugin("kubesecret", helpString, KubernetesSecretProvider) +} diff --git a/plugins.go b/plugins.go index 5f3855e..97770ec 100644 --- a/plugins.go +++ b/plugins.go @@ -12,23 +12,12 @@ import ( // It can also return an error if there was any kind of issue retrieving the requested environment variables. type CheckenvProvider func(string) (map[string]string, error) -// InitFromEnvFunction is a function which initializes a CheckenvProvider from the checkenv runtime environment. -// This is useful for providers that describe environment configurations in remote environments like -// via SSH or on cloud configuration stores. -type InitFromEnvFunction func() error - -// noop is an InitFromEnvFunction with no effect. It returns nil. -func noop() error { - return nil -} - // CheckenvPlugin represents all the metadata that checkenv requires about a registered plugin: // 1. A Help string to display to users explaining the plugins filter syntax, how it is initialized, and possibly more. // 2. An Init function which initializes the plugin when checkenv starts up. // 3. The Provider function responsible for providing environment configuration from the source that the plugin represents. type CheckenvPlugin struct { Help string - Init InitFromEnvFunction Provider CheckenvProvider } @@ -37,13 +26,12 @@ type CheckenvPlugin struct { var RegisteredPlugins map[string]CheckenvPlugin = make(map[string]CheckenvPlugin) // RegisterPlugin is the function that each plugin must call to provide its functionality to checkenv users. -func RegisterPlugin(name string, help string, init InitFromEnvFunction, provider CheckenvProvider) { +func RegisterPlugin(name string, help string, provider CheckenvProvider) { if _, ok := RegisteredPlugins[name]; ok { panic(fmt.Sprintf("A plugin already exists with name: %s", name)) } plugin := CheckenvPlugin{ Help: help, - Init: init, Provider: provider, } RegisteredPlugins[name] = plugin diff --git a/process_linux.go b/process_linux.go index ead73f7..2d0e681 100644 --- a/process_linux.go +++ b/process_linux.go @@ -75,5 +75,5 @@ func ProcessEnvProvider(filter string) (map[string]string, error) { func init() { helpString := "Provides the environment variables set for the process with the given pid." - RegisterPlugin("proc", helpString, noop, ProcessEnvProvider) + RegisterPlugin("proc", helpString, ProcessEnvProvider) } From fb486eb95f444258d1647bb28b98f8b17eacff30 Mon Sep 17 00:00:00 2001 From: Neeraj Kashyap Date: Tue, 22 Oct 2024 13:29:04 -0700 Subject: [PATCH 2/2] Added "-name" flag on "checkenv show" --- checkenv.go | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/checkenv.go b/checkenv.go index 659b05e..24661c4 100644 --- a/checkenv.go +++ b/checkenv.go @@ -69,6 +69,7 @@ func main() { showExport := showFlags.Bool("export", false, "Use this flag to prepend and \"export \" before every environment variable definition") showRaw := showFlags.Bool("raw", false, "Use this flag to prevent comments output") showValue := showFlags.Bool("value", false, "Print value only") + showName := showFlags.Bool("name", false, "Print name only") versionCommand := "version" @@ -98,12 +99,18 @@ func main() { fmt.Fprintf(os.Stderr, "Usage: %s %s [[+] ...] [[+]://,,..., ...]\nShows the environment variables defined by the given providers.\n", os.Args[0], os.Args[1]) os.Exit(2) } + + if *showName && *showValue { + fmt.Fprintf(os.Stderr, "You can't use both -name and -value flags at the same time.\n") + os.Exit(1) + } + spec := parseShowSpec(showFlags.Args()) providedVars := make(map[string]map[string]string) for providerSpec := range spec.loadFrom { vars, providerErr := VariablesFromProviderSpec(providerSpec) if providerErr != nil { - log.Fatalf(providerErr.Error()) + log.Fatal(providerErr.Error()) } providedVars[providerSpec] = vars } @@ -118,10 +125,12 @@ func main() { fmt.Printf("# Generated with %s - all variables:\n", providerSpec) } for k, v := range providedVars[providerSpec] { - if !*showValue { + if !*showValue && !*showName { fmt.Printf("%s%s=%s\n", exportPrefix, k, v) - } else { + } else if *showValue { fmt.Printf("%s\n", v) + } else if *showName { + fmt.Printf("%s\n", k) } } }