Implement Versioning for dev and release

When working in development, images and go binaries
will be versioned with the git hash.

On release the version can be overwritten in the `build/Makefile`
to explicitly set the version.

Closes #21

README.md

@@ -20,7 +20,7 @@ This software is currenty alpha, and subject to change. Not to be used in produc
 ## Installation
 `kubectl apply -f install.yaml`
 
-If you are running your own Docker repository, make a local copy of install.yaml
+If you are running your own Docker repository or want to install a specific version, make a local copy of install.yaml
 and edit to match your settings. 
 
 ## Usage

build/Makefile

@@ -23,10 +23,22 @@
 #     \_/ \__,_|_|  |_|\__,_|_.__/|_|\___|___/
 #
 
-VERSION ?= 0.1
+# base version target. This is usually the next release.
+base_version = 0.1
+
+#
+# All of the following can be overwritten with environemt variables
+# or passed through directly when invoking the relevent Make targets
+#
+
+# Version defaults to the short hash of the latest commit
+VERSION ?= $(base_version)-$(shell git rev-parse --short HEAD)
+# The registry that is being used to store docker images
 REGISTRY ?= gcr.io/agon-images
-CLUSTER_NAME ?= test-cluster
+# Where the kubectl configuration files are being stored
 KUBECONFIG ?= $(build_path)/.kube
+# The (gcloud) test cluster that is being worked against
+CLUSTER_NAME ?= test-cluster
 
 # Directory that this Makefile is in.
 mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
@@ -46,6 +58,8 @@ build_tag = agon-build:$(build_version)
 controller_tag = $(REGISTRY)/gameservers-controller:$(VERSION)
 sidecar_tag = $(REGISTRY)/gameservers-sidecar:$(VERSION)
 
+go_version_flags = -ldflags "-X github.com/agonio/agon/pkg.Version=$(VERSION)"
+
 #   _____                    _
 #  |_   _|_ _ _ __ __ _  ___| |_ ___
 #    | |/ _` | '__/ _` |/ _ \ __/ __|
@@ -63,10 +77,16 @@ test: ensure-image
 # Push all the images up to $(REGISTRY)
 push: push-gameservers-controller-image push-gameservers-sidecar-image
 
+# install the development version of Agon
+install:
+	cp $(build_path)/install.yaml $(build_path)/.install.yaml
+	sed -i -e 's!$${REGISTRY}!$(REGISTRY)!g' -e 's!$${VERSION}!$(VERSION)!g' $(build_path)/.install.yaml
+	docker run --rm $(common_mounts) --entrypoint=kubectl $(build_tag) apply -f $(mount_path)/build/.install.yaml
+
 # Build a static binary for the gameserver controller
 build-gameservers-controller-binary: ensure-image
 	docker run --rm -e "CGO_ENABLED=0" $(common_mounts) --entrypoint=go $(build_tag) build \
-		-o $(mount_path)/gameservers/controller/bin/controller -a -installsuffix cgo $(agon_package)/gameservers/controller
+		-o $(mount_path)/gameservers/controller/bin/controller -a $(go_version_flags) -installsuffix cgo $(agon_package)/gameservers/controller
 
 # Build the image for the gameserver controller
 build-gameservers-controller-image: ensure-image build-gameservers-controller-binary
@@ -79,7 +99,7 @@ push-gameservers-controller-image: ensure-image
 # build the static binary for the gamesever sidecar
 build-gameservers-sidecar-binary: ensure-image
 	docker run --rm -e "CGO_ENABLED=0" $(common_mounts) --entrypoint=go $(build_tag) build \
-		-o $(mount_path)/gameservers/sidecar/bin/sidecar -a -installsuffix cgo $(agon_package)/gameservers/sidecar
+		-o $(mount_path)/gameservers/sidecar/bin/sidecar -a $(go_version_flags) -installsuffix cgo $(agon_package)/gameservers/sidecar
 
 # Build the image for the gameserver sidecar
 build-gameservers-sidecar-image: ensure-image build-gameservers-sidecar-binary

build/install.yaml

@@ -0,0 +1,53 @@
+# Copyright 2017 Google Inc. All Rights Reserved.
+#
+# 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.
+
+# Install with development settings - suggest using `make install` to run
+
+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  name: gameservers.stable.agon.io
+spec:
+  group: stable.agon.io
+  version: v1alpha1
+  scope: Namespaced
+  names:
+    kind: GameServer
+    plural: gameservers
+    shortNames:
+    - gs
+    singular: gameserver
+---
+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: gameservers-controller
+spec:
+  replicas: 1
+  strategy:
+    type: Recreate
+  template:
+    metadata:
+      labels:
+        stable.agon.io/role: controller
+    spec:
+      containers:
+      - name: gameservers-controller
+        image: ${REGISTRY}/gameservers-controller:${VERSION}
+        imagePullPolicy: Always
+        env:
+        - name: ALWAYS_PULL_SIDECAR # set the sidecar imagePullPolicy to Always
+          value: "true"
+        - name: SIDECAR # overwrite the GameServer sidecar image that is used
+          value: ${REGISTRY}/gameservers-sidecar:${VERSION}

install.yaml

@@ -41,11 +41,8 @@ spec:
         stable.agon.io/role: controller
     spec:
       containers:
-      - name: gameservers-controller
+      - nameW: gameservers-controller
         image: gcr.io/agon-images/gameservers-controller:0.1
-        imagePullPolicy: Always # remove/set to IfNotPresent for production
         env:
-        - name: ALWAYS_PULL_SIDECAR
-          value: "true" # set to false for production
         # - name: SIDECAR # overwrite the GameServer sidecar image that is used
         #   value: gcr.io/agon-images/gameservers-sidecar:0.1

pkg/version.go

@@ -14,7 +14,8 @@
 
 package pkg
 
-const (
+var (
 	// Version is the global version for all binaries
-	Version = "0.1"
+	// This is set at compile time by the build process
+	Version string = "dev"
 )