Restructure the code for easy import

.gitignore

@@ -0,0 +1,18 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+vendor/
+
+# JetBrains project configuration
+.idea/

Gopkg.toml

@@ -0,0 +1,46 @@
+# Gopkg.toml example
+#
+# Refer to https://golang.github.io/dep/docs/Gopkg.toml.html
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/user/thing/cmd/thing"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#   name = "github.com/x/y"
+#   version = "2.4.0"
+#
+# [prune]
+#   non-go = false
+#   go-tests = true
+#   unused-packages = true
+
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/comail/colog"
+
+[[constraint]]
+  name = "github.com/julienschmidt/httprouter"
+  version = "1.3.0"
+
+[[constraint]]
+  branch = "master"
+  name = "k8s.io/api"
+
+[[constraint]]
+  name = "k8s.io/kubernetes"
+  version = "1.16.3"
+
+[prune]
+  go-tests = true
+  unused-packages = true

README.md

@@ -1,80 +1,18 @@
 # k8s-scheduler-extender-example
-This is an example of [Kubernetes Scheduler Extender](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/scheduling/scheduler_extender.md)
+This is a repo forked from an [k8s scheduler extender example](https://github.com/everpeace/k8s-scheduler-extender-example)
+developed by @everpeace. 
 
-## How to
+We restructured the code to wrap all shared functions and variables into a package `k8s-scheduler-extender`.
+Other referenced  packages including `kubernetes` are copied to `vendor`.
 
-### 0. checkout the repo
-
-```shell
-$ git clone [email protected]:everpeace/k8s-scheduler-extender-example.git
-$ cd k8s-scheduler-extender-example
-$ git submodule update --init
-```
-
-### 1. buid a docker image
-
-```
-$ IMAGE=YOUR_ORG/YOUR_IMAGE:YOUR_TAG
-
-$ docker build . -t "${IMAGE}"
-$ docker push "${IMAGE}"
-```
-
-### 2. deploy `my-scheduler` in `kube-system` namespace
-please see ConfigMap in [extender.yaml](extender.yaml) for scheduler policy json which includes scheduler extender config.
-
-```
-# bring up the kube-scheduler along with the extender image you've just built
-$ sed 's/a\/b:c/'$(echo "${IMAGE}" | sed 's/\//\\\//')'/' extender.yaml | kubectl apply -f -
-```
-
-For ease of observation, start streaming logs from the extender:
-
-```console
-$ kubectl -n kube-system logs deploy/my-scheduler -c my-scheduler-extender-ctr -f
-[  warn ] 2018/11/07 08:41:40 main.go:84: LOG_LEVEL="" is empty or invalid, fallling back to "INFO".
-[  info ] 2018/11/07 08:41:40 main.go:98: Log level was set to INFO
-[  info ] 2018/11/07 08:41:40 main.go:116: server starting on the port :80
+## Usage
+You can reference the functions and variables by import the package.
+```golang
+import "github.com/wangchen615/k8s-scheduler-extender-example/k8s_scheduler_extender"
 ```
 
-Open up an another termianl and proceed.
+The `main.go` is an example extender revised using the above reference.
 
-### 3. schedule test pod
-
-you will see `test-pod` will be scheduled by `my-scheduler`.
-
-```
-$ kubectl create -f test-pod.yaml
-
-$ kubectl describe pod test-pod
-Name:         test-pod
-...
-Events:
-  Type    Reason                 Age   From               Message
-  ----    ------                 ----  ----               -------
-  Normal  Scheduled              25s   my-scheduler       Successfully assigned test-pod to minikube
-  Normal  SuccessfulMountVolume  25s   kubelet, minikube  MountVolume.SetUp succeeded for volume "default-token-wrk5s"
-  Normal  Pulling                24s   kubelet, minikube  pulling image "nginx"
-  Normal  Pulled                 8s    kubelet, minikube  Successfully pulled image "nginx"
-  Normal  Created                8s    kubelet, minikube  Created container
-  Normal  Started                8s    kubelet, minikube  Started container
-```
-
-
-## License
-
-```
-Copyright 2018 Shingo Omura <https://github.com/everpeace>
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-   http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-```
+## Used packages
+The dependency graph of all packages used can be found below.
+![](dep.png)

README.md.org

@@ -0,0 +1,80 @@
+# k8s-scheduler-extender-example
+This is an example of [Kubernetes Scheduler Extender](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/scheduling/scheduler_extender.md)
+
+## How to
+
+### 0. checkout the repo
+
+```shell
+$ git clone [email protected]:everpeace/k8s-scheduler-extender-example.git
+$ cd k8s-scheduler-extender-example
+$ git submodule update --init
+```
+
+### 1. buid a docker image
+
+```
+$ IMAGE=YOUR_ORG/YOUR_IMAGE:YOUR_TAG
+
+$ docker build . -t "${IMAGE}"
+$ docker push "${IMAGE}"
+```
+
+### 2. deploy `my-scheduler` in `kube-system` namespace
+please see ConfigMap in [extender.yaml](extender.yaml) for scheduler policy json which includes scheduler extender config.
+
+```
+# bring up the kube-scheduler along with the extender image you've just built
+$ sed 's/a\/b:c/'$(echo "${IMAGE}" | sed 's/\//\\\//')'/' extender.yaml | kubectl apply -f -
+```
+
+For ease of observation, start streaming logs from the extender:
+
+```console
+$ kubectl -n kube-system logs deploy/my-scheduler -c my-scheduler-extender-ctr -f
+[  warn ] 2018/11/07 08:41:40 main.go:84: LOG_LEVEL="" is empty or invalid, fallling back to "INFO".
+[  info ] 2018/11/07 08:41:40 main.go:98: Log level was set to INFO
+[  info ] 2018/11/07 08:41:40 main.go:116: server starting on the port :80
+```
+
+Open up an another termianl and proceed.
+
+### 3. schedule test pod
+
+you will see `test-pod` will be scheduled by `my-scheduler`.
+
+```
+$ kubectl create -f test-pod.yaml
+
+$ kubectl describe pod test-pod
+Name:         test-pod
+...
+Events:
+  Type    Reason                 Age   From               Message
+  ----    ------                 ----  ----               -------
+  Normal  Scheduled              25s   my-scheduler       Successfully assigned test-pod to minikube
+  Normal  SuccessfulMountVolume  25s   kubelet, minikube  MountVolume.SetUp succeeded for volume "default-token-wrk5s"
+  Normal  Pulling                24s   kubelet, minikube  pulling image "nginx"
+  Normal  Pulled                 8s    kubelet, minikube  Successfully pulled image "nginx"
+  Normal  Created                8s    kubelet, minikube  Created container
+  Normal  Started                8s    kubelet, minikube  Started container
+```
+
+
+## License
+
+```
+Copyright 2018 Shingo Omura <https://github.com/everpeace>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+```