diff --git a/shell/k8s/k8s-app-info.sh b/shell/k8s/k8s-app-info.sh
index c908d5f..0f68a75 100644
--- a/shell/k8s/k8s-app-info.sh
+++ b/shell/k8s/k8s-app-info.sh
@@ -65,7 +65,16 @@ function get::selector {
   fi
 
   if [[ "${SELECTOR}" == "" ]]; then
-    echo -e "\033[0;31m[Error] not found $APPNAME selector\033[0m"
+   resource="service job cronjob replicaset daemonset statefulset"
+   for r in $resource
+   do
+     SELECTOR=$(kubectl -n kube-system get ${r} ${APPNAME} --ignore-not-found --show-labels --no-headers 2>/dev/null | awk '{print $NF}' | grep -v '<none>' |head -1)
+     if [[ "${SELECTOR}" != "" ]]; then break;fi
+   done
+  fi
+
+  if [[ "${SELECTOR}" == "" ]]; then
+    echo -e "\n\033[0;31m[Error] not found $APPNAME selector.\033[0m"
     exit 1
   fi
   file::write "
@@ -134,6 +143,8 @@ function get::info {
   get::describe pod
   get::describe configmaps
   get::describe secrets
+  get::describe pvc
+  get::describe pv
   get::pods_log
   get::k8s_event
   get::cluster
diff --git a/shell/k8s/k8s-backup.sh b/shell/k8s/k8s-backup.sh
index ed1cc12..f476272 100644
--- a/shell/k8s/k8s-backup.sh
+++ b/shell/k8s/k8s-backup.sh
@@ -8,11 +8,32 @@
 ###################################################################
 # https://github.com/pieterlange/kube-backup/blob/master/entrypoint.sh
 
-resources_path="./backup-$(date +%s)"
 
-function getall {
-  ns=$1 
-  for r in $(kubectl api-resources --verbs=list --namespaced -o name | grep -v "events.events.k8s.io" | grep -v "events" | sort | uniq); do
+[[ -n $DEBUG ]] && set -x || true
+set -o errtrace         # Make sure any error trap is inherited
+set -o nounset          # Disallow expansion of unset variables
+set -o pipefail         # Use last non-zero exit code in a pipeline
+
+
+######################################################################################################
+# environment configuration
+######################################################################################################
+
+NAMESPACE="${NAMESPACE:-all}"
+RESOURCES="${RESOURCES:-all}"
+RESOURCES_PATH="/opt/k8s-backup_$(date +%s)"
+
+######################################################################################################
+# function
+######################################################################################################
+
+
+function get::resource() {
+  ns=$1
+  if [[ "${RESOURCES}" == "all" ]]; then
+    RESOURCES=$(kubectl api-resources --verbs=list --namespaced -o name | grep -v "events.events.k8s.io" | grep -v "events" | sort |uniq)
+  fi
+  for r in ${RESOURCES}; do
     echo "Resource:" $r
     for l in $(kubectl -n ${ns} get --ignore-not-found ${r} -o jsonpath="{$.items[*].metadata.name}");do
       kubectl -n ${ns} get --ignore-not-found ${r} ${l} -o yaml \
@@ -22,23 +43,69 @@ function getall {
            -e 's/ selfLink:.*//g' \
            -e 's/ creationTimestamp:.*//g' \
            -e 's/ managedFields:.*//g' \
-           -e '/^\s*$/d' > "$resources_path/${n}/${l}.${r}.yaml"
+           -e '/^\s*$/d' > "$RESOURCES_PATH/${n}/${l}.${r}.yaml"
     done
   done
 }
 
-for n in $(kubectl get ns -o jsonpath="{$.items[*].metadata.name}");do
-  echo "Namespace:" $n
-  [ -d "$resources_path/$n" ] || mkdir -p "$resources_path/$n"
-  kubectl get ns ${n} --ignore-not-found -o yaml \
-    | sed -n "/ managedFields:/{p; :a; N; / name: ${n}/!ba; s/.*\\n//}; p" \
-    | sed -e 's/ uid:.*//g' \
-       -e 's/ resourceVersion:.*//g' \
-       -e 's/ selfLink:.*//g' \
-       -e 's/ creationTimestamp:.*//g' \
-       -e 's/ managedFields:.*//g' \
-       -e '/^\s*$/d' > "$resources_path/${n}/namespace.yaml"
-  getall $n
+function get::namespace() {
+  if [[ "${RESOURCES}" == "all" ]]; then
+     NAMESPACE=$(kubectl get ns -o jsonpath="{$.items[*].metadata.name}")
+  fi
+  for n in ${NAMESPACE};do
+    echo "Namespace:" $n
+    [ -d "$RESOURCES_PATH/$n" ] || mkdir -p "$RESOURCES_PATH/$n"
+    kubectl get ns ${n} --ignore-not-found -o yaml \
+      | sed -n "/ managedFields:/{p; :a; N; / name: ${n}/!ba; s/.*\\n//}; p" \
+      | sed -e 's/ uid:.*//g' \
+         -e 's/ resourceVersion:.*//g' \
+         -e 's/ selfLink:.*//g' \
+         -e 's/ creationTimestamp:.*//g' \
+         -e 's/ managedFields:.*//g' \
+         -e '/^\s*$/d' > "$RESOURCES_PATH/${n}/namespace.yaml"
+    get::resource $n
+  done
+}
+
+function help::usage {
+  # 使用帮助
+  
+  cat << EOF
+
+backup k8s resource.
+
+Usage:
+  $(basename $0) [flag]
+  
+Flag:
+  -ns,--namespace  namespace, default: all
+  -r,--resource    resource, default: all
+  -h,--help        help info.
+EOF
+
+ exit 1
+}
+ 
+######################################################################################################
+# main
+######################################################################################################
+
+
+while [ "${1:-}" != "" ]; do
+  case $1 in
+    -ns | --namespace )     shift
+                            NAMESPACE=${1:-$NAMESPACE}
+                            ;;
+    -r  | --resource )      shift
+                            RESOURCES=${1:-$RESOURCES}
+                            ;;
+    -h  | --help )          help::usage
+                            ;;
+    * )                     help::usage
+  esac
+  shift
 done
 
-echo "File: ${resources_path}"
+get::namespace
+
+echo "File: ${RESOURCES_PATH}"