Fix golint errors

config/config.go

@@ -11,6 +11,8 @@ import (
 )
 
 var (
+	// DefaultConfig is the default configuration that is used when no
+	// configuration file is provided
 	DefaultConfig = &Config{
 		map[string]Module{
 			"tcp": Module{
@@ -32,6 +34,7 @@ var (
 	}
 )
 
+// LoadConfig loads configuration from a file
 func LoadConfig(confFile string) (*Config, error) {
 	var c *Config
 
@@ -50,10 +53,12 @@ func LoadConfig(confFile string) (*Config, error) {
 	return c, nil
 }
 
+// Config configures the exporter
 type Config struct {
 	Modules map[string]Module `yaml:"modules"`
 }
 
+// Module configures a prober
 type Module struct {
 	Prober     string           `yaml:"prober,omitempty"`
 	Timeout    time.Duration    `yaml:"timeout,omitempty"`
@@ -63,14 +68,17 @@ type Module struct {
 	Kubernetes KubernetesProbe  `yaml:"kubernetes,omitempty"`
 }
 
+// TCPProbe configures a tcp probe
 type TCPProbe struct {
 	StartTLS string `yaml:"starttls,omitempty"`
 }
 
+// HTTPSProbe configures a https probe
 type HTTPSProbe struct {
 	ProxyURL URL `yaml:"proxy_url,omitempty"`
 }
 
+// KubernetesProbe configures a kubernetes probe
 type KubernetesProbe struct {
 	Kubeconfig string `yaml:"kubeconfig,omitempty"`
 }

prober/file.go

@@ -9,6 +9,7 @@ import (
 	"github.com/ribbybibby/ssl_exporter/config"
 )
 
+// ProbeFile collects certificate metrics from local files
 func ProbeFile(ctx context.Context, target string, module config.Module, registry *prometheus.Registry) error {
 	errCh := make(chan error, 1)
 

prober/kubernetes.go

@@ -18,9 +18,12 @@ import (
 )
 
 var (
+	// ErrKubeBadTarget is returned when the target doesn't match the
+	// expected form for the kubernetes prober
 	ErrKubeBadTarget = fmt.Errorf("Target secret must be provided in the form: <namespace>/<name>")
 )
 
+// ProbeKubernetes collects certificate metrics from kubernetes.io/tls Secrets
 func ProbeKubernetes(ctx context.Context, target string, module config.Module, registry *prometheus.Registry) error {
 	client, err := newKubeClient(module.Kubernetes.Kubeconfig)
 	if err != nil {

test/test.go

@@ -29,6 +29,7 @@ func GenerateTestCertificate(expiry time.Time) ([]byte, []byte) {
 	return pemCert, pemKey
 }
 
+// GenerateSignedCertificate generates a certificate that is signed
 func GenerateSignedCertificate(cert, parentCert *x509.Certificate, parentKey *rsa.PrivateKey) (*x509.Certificate, []byte, []byte) {
 	privateKey, err := rsa.GenerateKey(rand.Reader, 2048)
 	if err != nil {
@@ -49,6 +50,9 @@ func GenerateSignedCertificate(cert, parentCert *x509.Certificate, parentKey *rs
 		pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: derCert}),
 		pem.EncodeToMemory(&pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(privateKey)})
 }
+
+// GenerateSelfSignedCertificateWithPrivateKey generates a self signed
+// certificate with the given private key
 func GenerateSelfSignedCertificateWithPrivateKey(cert *x509.Certificate, privateKey *rsa.PrivateKey) (*x509.Certificate, []byte) {
 	derCert, err := x509.CreateCertificate(rand.Reader, cert, cert, &privateKey.PublicKey, privateKey)
 	if err != nil {
@@ -63,6 +67,7 @@ func GenerateSelfSignedCertificateWithPrivateKey(cert *x509.Certificate, private
 	return genCert, pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: derCert})
 }
 
+// GenerateCertificateTemplate generates the template used to issue test certificates
 func GenerateCertificateTemplate(expiry time.Time) *x509.Certificate {
 	return &x509.Certificate{
 		BasicConstraintsValid: true,