diff --git a/examples/auth.json b/examples/auth.json
new file mode 100644
index 0000000..a2e9214
--- /dev/null
+++ b/examples/auth.json
@@ -0,0 +1,20 @@
+{
+    "quay.io": {
+        "username": "xxx",
+        "password": "xxxxxxxxx",
+        "insecure": true
+    },
+    "registry.cn-beijing.aliyuncs.com": {
+        "username": "xxx",
+        "password": "xxxxxxxxx"
+    },
+    "docker.io": {
+        "username": "xxx",
+        "password": "xxxxxxxxxx"
+    },
+    "quay.io/coreos": {
+        "username": "abc",
+        "password": "xxxxxxxxx",
+        "insecure": true
+    }
+}
diff --git a/examples/auth.yaml b/examples/auth.yaml
new file mode 100644
index 0000000..c56ee21
--- /dev/null
+++ b/examples/auth.yaml
@@ -0,0 +1,14 @@
+quay.io:
+  username: xxx
+  password: xxxxxxxxx
+  insecure: true
+registry.cn-beijing.aliyuncs.com:
+  username: xxx
+  password: xxxxxxxxx
+docker.io:
+  username: xxx
+  password: xxxxxxxxxx
+quay.io/coreos:
+  username: abc
+  password: xxxxxxxxx
+  insecure: true
diff --git a/examples/config.json b/examples/config.json
new file mode 100644
index 0000000..b03c5db
--- /dev/null
+++ b/examples/config.json
@@ -0,0 +1,29 @@
+{
+    "auth": {
+        "quay.io": {
+            "username": "xxx",
+            "password": "xxxxxxxxx",
+            "insecure": true
+        },
+        "registry.cn-beijing.aliyuncs.com": {
+            "username": "xxx",
+            "password": "xxxxxxxxx"
+        },
+        "docker.io": {
+            "username": "xxx",
+            "password": "xxxxxxxxxx"
+        },
+        "quay.io/coreos": {
+            "username": "abc",
+            "password": "xxxxxxxxx",
+            "insecure": true  
+        }
+    },
+    "images": {
+        "quay.io/coreos/kube-rbac-proxy": "quay.io/ruohe/kube-rbac-proxy",
+
+        "quay.io/coreos/kube-rbac-proxy:v1.0": "quay.io/ruohe/kube-rbac-proxy",
+
+        "quay.io/coreos/kube-rbac-proxy:v1.0,v2.0": "quay.io/ruohe/kube-rbac-proxy"
+    }
+}
diff --git a/examples/config.yaml b/examples/config.yaml
new file mode 100644
index 0000000..7652715
--- /dev/null
+++ b/examples/config.yaml
@@ -0,0 +1,19 @@
+auth:
+  quay.io:
+    username: xxx
+    password: xxxxxxxxx
+    insecure: true
+  registry.cn-beijing.aliyuncs.com:
+    username: xxx
+    password: xxxxxxxxx
+  docker.io:
+    username: xxx
+    password: xxxxxxxxxx
+  quay.io/coreos:
+    username: abc
+    password: xxxxxxxxx
+    insecure: true
+images:
+  quay.io/coreos/kube-rbac-proxy: quay.io/ruohe/kube-rbac-proxy
+  quay.io/coreos/kube-rbac-proxy:v1.0: quay.io/ruohe/kube-rbac-proxy
+  quay.io/coreos/kube-rbac-proxy:v1.0,v2.0: quay.io/ruohe/kube-rbac-proxy
\ No newline at end of file
diff --git a/examples/images.json b/examples/images.json
new file mode 100644
index 0000000..95655f4
--- /dev/null
+++ b/examples/images.json
@@ -0,0 +1,6 @@
+{
+    "quay.io/coreos/kube-rbac-proxy": "quay.io/ruohe/kube-rbac-proxy",
+    "quay.io/coreos/kube-rbac-proxy:v1.0": "quay.io/ruohe/kube-rbac-proxy",
+    "quay.io/coreos/kube-rbac-proxy:v1.0,v2.0": "quay.io/ruohe/kube-rbac-proxy",
+    "quay.io/coreos/kube-rbac-proxy:v1.1": ["quay.io/ruohe/kube-rbac-proxy1", "quay.io/ruohe/kube-rbac-proxy2"]
+}
diff --git a/examples/images.yaml b/examples/images.yaml
new file mode 100644
index 0000000..dac5a66
--- /dev/null
+++ b/examples/images.yaml
@@ -0,0 +1,7 @@
+quay.io/coreos/kube-rbac-proxy: quay.io/ruohe/kube-rbac-proxy
+quay.io/coreos/kube-rbac-proxy:v1.0: quay.io/ruohe/kube-rbac-proxy
+quay.io/coreos/kube-rbac-proxy:v1.0,v2.0: quay.io/ruohe/kube-rbac-proxy
+quay.io/coreos/kube-rbac-proxy@sha256:14b267eb38aa85fd12d0e168fffa2d8a6187ac53a14a0212b0d4fce8d729598c: quay.io/ruohe/kube-rbac-proxy
+quay.io/coreos/kube-rbac-proxy:v1.1:
+  - quay.io/ruohe/kube-rbac-proxy1
+  - quay.io/ruohe/kube-rbac-proxy2
\ No newline at end of file
diff --git a/pkg/client/logger.go b/pkg/client/logger.go
index cb4b4e0..b0e4259 100644
--- a/pkg/client/logger.go
+++ b/pkg/client/logger.go
@@ -14,10 +14,14 @@ const (
 func NewFileLogger(path string) *logrus.Logger {
 	logger := logrus.New()
 
+	// disable color
+	if len(path) != 0 {
+		_ = os.Setenv("NO_COLOR", "true")
+	}
+
 	logger.Formatter = &logrus.TextFormatter{
 		FullTimestamp:   true,
 		TimestampFormat: logTimestampFormat,
-		ForceColors:     true,
 	}
 
 	if file, err := os.OpenFile(path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0666); err == nil {