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add webapp+registry sample
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‎apps/basic_web_app/.env.tpl

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IMAGE_NAME=go-sample
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IMAGE_TAG=latest
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AZURE_BASE_NAME=go-webapp-tester
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AZURE_DEFAULT_LOCATION=westus2
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# required for continous container build setup
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GH_TOKEN=

‎apps/basic_web_app/.gitignore

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out/
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.env

‎apps/basic_web_app/Dockerfile

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FROM golang:1.10.3-stretch
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ARG PACKAGE=github.com/Azure-Samples/azure-sdk-for-go-samples/apps/basic_web_app
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RUN mkdir /app # for built artifacts
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RUN mkdir -p $GOPATH/src/${PACKAGE}
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WORKDIR $GOPATH/src/${PACKAGE}
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# better for build cache to specify necessary files
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ADD ["Gopkg.*","main.go", "./"]
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RUN go get -u -v github.com/golang/dep/cmd/dep && dep ensure -v
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RUN go build -v -o /app/server .
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CMD ["/app/server"]

‎apps/basic_web_app/Gopkg.lock

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‎apps/basic_web_app/Gopkg.toml

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[prune]
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go-tests = true
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unused-packages = true
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[[constraint]]
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branch = "master"
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name = "golang.org/x/net"

‎apps/basic_web_app/LICENSE

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Copyright Microsoft Corporation
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to permit
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persons to whom the Software is furnished to do so, subject to the
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following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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USE OR OTHER DEALINGS IN THE SOFTWARE.

‎apps/basic_web_app/Makefile

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PACKAGE = github.com/Azure-Samples/azure-sdk-for-go-samples/apps/basic_web_app
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REGISTRY = local
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IMAGE = go-sample
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TAG = latest
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PORT = 8080
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IMAGE_URI = $(REGISTRY)/$(IMAGE):$(TAG)
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C = $(IMAGE)-tester
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HOST = localhost:$(PORT)
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binary:
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mkdir -p out
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go build -o out/server .
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./out/server &
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curl http://$(HOST)/?name=josh && echo ""
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pkill --euid $(USER) --newest --exact server
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container:
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docker build -t $(IMAGE_URI) .
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# docker push $(IMAGE_URI)
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docker run -d --rm \
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--name $C \
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--publish "$(PORT):8080" \
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$(IMAGE_URI)
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curl "http://$(HOST)/?name=josh" && echo ""
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docker container logs $C
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docker container stop $C
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echo "start a new container with"
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echo " \`docker run [-d|-it] -p $(PORT):8080 $(IMAGE_URI)\`"
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.PHONY: binary container

‎apps/basic_web_app/README.md

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# Web App
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Continuously build and deploy a Go web app using Azure App Service and Azure
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Container Registry.
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This package includes a basic Go web app and scripts to set up infrastructure
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for it in Azure.
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Requires [Azure CLI][].
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## Try It!
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Set configuration in a local .env file in the package root by copying
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`.env.tpl` to `.env`. Change `AZURE_BASE_NAME` to something relatively unique
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to you; for example you might include your name. Then run ./[setup.sh][] to
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build and deploy your container to Container Registry and App Service.
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If run within the Azure Go SDK samples repo, this will carry out a one-off
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build and push to your registry, which will trigger refresh of the App Service
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Web App. If you stick with the script defaults, you can visit your app at
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`https://${AZURE_BASE_NAME}-webapp.azurewebsites.net/`.
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### Continuous Build and Deploy
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Follow these steps to set up continuous build and deploy:
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1. Copy the contents of this package to your own fresh git repo and push it to GitHub.
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2. Specify an image name in env var `IMAGE_NAME` (e.g. in `.env`) that matches
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your GitHub 'org/repo' structure.
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3. Run `./setup.sh`. It will arrange continuous build and deploy for you from
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the specified repo/image name.
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**NOTE**: Container Registry Build requires a [GitHub personal access
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token](https://github.com/settings/tokens); you need to get one from the linked
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page and set it in a local environment variable `GH_TOKEN`, e.g. `export
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GH_TOKEN=mylongtokenstring`. You can also add it to your local `.env` file for
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persistence.
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To test continuous integration, now make a change and `git push` it to your
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repo. The Container Registry build task should detect the change, rebuild your
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container, and notify App Service; which should then refresh and reload your
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container image and app.
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## More Details
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[setup.sh][] ensures an Azure resource group, container registry, app service
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plan, and container-based web app are provisioned and connected in the
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subscription currently logged in to [Azure CLI][].
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It uses the following environment variables to choose names:
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* IMAGE\_NAME: Name of container image (aka "repo").
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* IMAGE\_TAG: Tag for container image.
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* AZURE\_BASE\_NAME: Prefix for Azure resources.
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* AZURE\_DEFAULT\_LOCATION: Location for Azure resources.
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These names can be specified in a .env file in the root of the package. If a
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`.env` file isn't found, `.env.tpl` is copied to `.env` and used.
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Explicit parameters can also be passed, see comments at beginning of
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[setup.sh][] for details.
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[Azure CLI]: https://github.com/Azure/azure-cli
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[setup.sh]: ./setup.sh

‎apps/basic_web_app/main.go

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package main
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import (
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"fmt"
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"golang.org/x/net/html"
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"log"
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"net/http"
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"os"
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)
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func main() {
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// find port selected by service, default to 8080
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var port string
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var found bool
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port, found = os.LookupEnv("PORT")
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if found == true {
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// prepend a colon
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port = fmt.Sprintf(":%s", port)
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} else {
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port = ":8080"
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}
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http.HandleFunc("/", tester)
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log.Fatal(http.ListenAndServe(port, nil))
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}
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// tester
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func tester(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintf(w, "Hello %s!", html.EscapeString(
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r.URL.Query().Get("name")))
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log.Printf("request received, details follow:\n%+v\n", r)
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}

‎apps/basic_web_app/scripts/rm_helpers.sh

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function ensure_group () {
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local group_name=$1
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local group_id
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group_id=$(az group show --name $group_name --query 'id' --output tsv 2> /dev/null)
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if [[ -z $group_id ]]; then
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group_id=$(az group create \
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--name $group_name \
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--location $location \
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--query 'id' --output tsv)
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fi
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echo $group_id
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}
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