add bin/azk8spull.

Author: xuxinkun

README.md

@@ -18,6 +18,14 @@ chmod +x install.sh
 source /etc/profile
 ```
 
+`azk8spull` function can not work with zsh. So, `bin/azk8spull` is provided for zsh. Install it as follow if using zsh.
+
+```
+cp bin/azk8spull /usr/bin
+chmod +x /usr/bin/azk8spull
+sed -i '/source \/etc\/littletools\/azk8spull.sh/d' /etc/littletools/littletools.sh
+```
+
 ## docker tools(docker-tools)
 
 | command             | params        | description                                                  |

bin/azk8spull

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+image=$1
+if [ -z $image ]; then
+    echo "## azk8spull image name cannot be null."
+else
+    array=(`echo $image | tr '/' ' '` )
+
+    domainName=""
+    repoName=""
+    imageName=""
+
+    if [ ${#array[*]} -eq 3 ]; then
+        repoName=${array[1]}
+        imageName=${array[2]}
+        if [ "${array[0]}"x = "docker.io"x ]; then
+            domainName="dockerhub.azk8s.cn"
+        elif [ "${array[0]}"x = "gcr.io"x ]; then
+            domainName="gcr.azk8s.cn"
+        elif [ "${array[0]}"x = "quay.io"x ]; then
+            domainName="quay.azk8s.cn"
+        else
+            echo '## azk8spull can not support pulling $image right now.'
+        fi
+    elif [ ${#array[*]} -eq 2 ]; then
+        if [ "${array[0]}"x = "k8s.gcr.io"x ]; then
+            domainName="gcr.azk8s.cn"
+            repoName="google_containers"
+            imageName=${array[1]}
+        else
+            domainName="dockerhub.azk8s.cn"
+            repoName=${array[0]}
+            imageName=${array[1]}
+        fi
+    elif [ ${#array[*]} -eq 1 ]; then
+            domainName="dockerhub.azk8s.cn"
+            repoName="library"
+            imageName=${array[0]}
+    else
+        echo '## azk8spull can not support pulling $image right now.'
+    fi
+    if [ $domainName != "" ]; then
+        echo "## azk8spull try to pull image from mirror $domainName/$repoName/$imageName."
+        docker pull  $domainName/$repoName/$imageName
+        if [ $? -eq 0 ]; then
+            echo "## azk8spull try to tag $domainName/$repoName/$imageName to $image."
+            docker tag $domainName/$repoName/$imageName $image
+            if [ $? -eq 0 ]; then
+                echo '## azk8spull finish pulling. '
+            fi
+        fi
+    fi
+fi