Add Django/Postgres/Redis Container Engine example

container_engine/django_postgres_redis/.gitignore

@@ -0,0 +1,3 @@
+.env
+guestbook/static
+

container_engine/django_postgres_redis/Makefile

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+GCLOUD_PROJECT:=$(shell gcloud config list project --format="value(core.project)")
+ZONE=$(shell gcloud config list compute/zone --format="value(compute.zone)")
+CLUSTER_NAME=guestbook
+COOL_DOWN=15
+MIN=2
+MAX=15
+TARGET=50
+RC=frontend
+
+.PHONY: all
+all: deploy
+
+.PHONY: create-cluster
+create-cluster:
+	gcloud container clusters create guestbook \
+		--scope "https://www.googleapis.com/auth/userinfo.email","cloud-platform" \
+		--num-nodes=$(MIN)
+	gcloud container clusters get-credentials guestbook
+
+.PHONY: create-bucket
+create-bucket:
+	gsutil mb gs://$(GCLOUD_PROJECT)
+	gsutil defacl set public-read gs://$(GCLOUD_PROJECT)
+
+.PHONY: template
+template:
+	sed -i ".tmpl" "s/\$$GCLOUD_PROJECT/$(GCLOUD_PROJECT)/g" kubernetes_configs/postgres.yaml
+	sed -i ".tmpl" "s/\$$GCLOUD_PROJECT/$(GCLOUD_PROJECT)/g" kubernetes_configs/frontend.yaml
+	sed -i ".tmpl" "s/\$$GCLOUD_PROJECT/$(GCLOUD_PROJECT)/g" kubernetes_configs/load_tester.yaml
+
+.PHONY: deploy
+deploy: push template
+	kubectl create -f kubernetes_config/frontend.yaml
+
+.PHONY: update
+update:
+	kubectl rolling-update guestbook --image=gcr.io/${GCLOUD_PROJECT}/guestbook
+
+.PHONY: disk
+disk:
+	gcloud compute disks create pg-data  --size 500GB
+
+.PHONY: firewall
+firewall:
+	gcloud compute firewall-rules create kubepostgres --allow tcp:30061
+
+.PHONY: autoscale-on
+autoscale-on:
+	AUTOSCALE_GROUP=$(shell gcloud container clusters describe $(CLUSTER_NAME) --zone $(ZONE) --format yaml | grep -A 1 instanceGroupUrls | awk -F/ 'FNR ==2 {print $$NF}')
+	gcloud compute instance-groups managed set-autoscaling $(AUTOSCALE_GROUP) \
+	  --cool-down-period $(COOL_DOWN) \
+	  --max-num-replicas $(MAX) \
+	  --min-num-replicas $(MIN) \
+	  --scale-based-on-cpu --target-cpu-utilization $(shell echo "scale=2; $(TARGET)/100" | bc)
+	kubectl autoscale rc $(RC) --min=$(MIN) --max=$(MAX) --cpu-percent=$(TARGET)
+
+.PHONY: db-setup
+db-setup:
+	POSTGRES_POD_NAME=$(shell kubectl get pods | grep postgres | awk '{print $$1}')
+	kubectl exec $(POSTGRES_POD_NAME) -- /init_db.sh
+
+.PHONY: migrations
+migrations:
+	FRONTEND_POD_NAME=$(shell kubectl get pods | grep frontend -m 1 | awk '{print $$1}' )
+	kubectl exec $(FRONTEND_POD_NAME) -- python /app/manage.py migrate
+
+
+.PHONY: delete
+delete:
+	gcloud container clusters delete guestbook
+	gcloud compute disks delete pg-data