Adding new step4 with docker-compose. This is only the first step, wh…

…ich is not complete yet. For now, all the paths and jars of the Spring Boot services are prepared.

README.md

@@ -191,6 +191,21 @@ This will fire up multiple containers running Spring Boot Apps inside Docker Win
 ![spring-cloud-example-running-docker-windows-containers](https://github.com/jonashackt/ansible-windows-docker-springboot/blob/master/spring-cloud-example-running-docker-windows-containers.png)
 
 
+## How to scale multiple Spring Boot Apps inside a Docker Windows Containers with Ansible, docker-compose and Spring Cloud Netflix ([step3-multiple-spring-boot-apps](https://github.com/jonashackt/ansible-windows-docker-springboot/tree/master/step4-multiple-spring-boot-apps-docker-compose))
+
+
+Everything needed here is inside [step4-multiple-spring-boot-apps-docker-compose](https://github.com/jonashackt/ansible-windows-docker-springboot/tree/master/step4-multiple-spring-boot-apps-docker-compose). Be sure to have cloned and (Maven-) build the complete Spring Cloud example apps [spring-cloud-netflix-docker](https://github.com/jonashackt/spring-cloud-netflix-docker).  Let´s cd into `step4-multiple-spring-boot-apps-docker-compose` and run the playbook:
+
+```
+ansible-playbook -i hostsfile ansible-windows-docker-springboot.yml --extra-vars "host=ansible-windows-docker-springboot-dev"
+```
+
+This will fire up multiple containers running Spring Boot Apps inside Docker Windows Containers on your Windows box. They will leverage the power of Spring Cloud Netflix with Zuul as a Proxy and Eureka as Service Registry (which dynamically tells Zuul, which Apps to route).
+
+![spring-cloud-example-running-docker-windows-containers-docker-compose](https://github.com/jonashackt/ansible-windows-docker-springboot/blob/master/spring-cloud-example-running-docker-windows-containers-docker-compose.png)
+
+
+
 ## Best practices
 
 ##### Using Powershell on Host to Connect to Container

step3-multiple-spring-boot-apps/ansible-windows-docker-springboot.yml

@@ -40,7 +40,18 @@
         port: 8091
       jar_input_path: "../../spring-cloud-netflix-docker/weatherbackend/target/weatherbackend-0.0.1-SNAPSHOT.jar"
 
-  - name: Copy docker-compose.yml to directory C:\spring-boot (this is only additionally, compose isn´t necessary for the apps to run)
-    win_template:
-      src: "../../spring-cloud-netflix-docker/docker-compose.yml"
-      dest: "{{base_path}}\\docker-compose.yml"
+  - name: Run Weather Backend Service 3 (Spring Boot app) inside Windows-Docker-Container
+    include: spring-boot-app-windows-docker.yml
+    vars:
+      spring_boot_app:
+        name: weatherbackend-third
+        port: 8092
+      jar_input_path: "../../spring-cloud-netflix-docker/weatherbackend/target/weatherbackend-0.0.1-SNAPSHOT.jar"
+
+  - name: Run Weather Backend Service 4 (Spring Boot app) inside Windows-Docker-Container
+    include: spring-boot-app-windows-docker.yml
+    vars:
+      spring_boot_app:
+        name: weatherbackend-forth
+        port: 8093
+      jar_input_path: "../../spring-cloud-netflix-docker/weatherbackend/target/weatherbackend-0.0.1-SNAPSHOT.jar"

step4-multiple-spring-boot-apps-docker-compose/ansible-windows-docker-springboot.yml

@@ -0,0 +1,35 @@
+---
+- hosts: "{{host}}"
+  vars:
+    base_path: "C:\\spring-boot"
+    service_registry_name: eureka-serviceregistry
+    services:
+      - name: eureka-serviceregistry
+        path_to_jar: "../../spring-cloud-netflix-docker/eureka-serviceregistry/target/eureka-serviceregistry-0.0.1-SNAPSHOT.jar"
+        port: 8761
+      - name: zuul-edgeservice
+        path_to_jar: "../../spring-cloud-netflix-docker/zuul-edgeservice/target/zuul-edgeservice-0.0.1-SNAPSHOT.jar"
+        port: 8080
+      - name: weatherbackend
+        path_to_jar: "../../spring-cloud-netflix-docker/weatherbackend/target/weatherbackend-0.0.1-SNAPSHOT.jar"
+        port: 8090
+      - name: weatherbackend-second
+        path_to_jar: "../../spring-cloud-netflix-docker/weatherbackend/target/weatherbackend-0.0.1-SNAPSHOT.jar"
+        port: 8090
+
+  tasks:
+  - name: Create base directory C:\spring-boot, if not there
+    win_file: path={{base_path}} state=directory
+
+  - name: Preparing the Spring Boot App´s Files for later docker-compose run
+    include: spring-boot-app-prepare.yml
+    with_items: "{{ vars.services }}"
+
+  - name: Template docker-compose.yml to directory C:\spring-boot
+    win_template:
+      src: "templates/docker-compose.j2"
+      dest: "{{base_path}}\\docker-compose.yml"
+
+  # Run docker-compose
+
+  # Do Healthchecks

step4-multiple-spring-boot-apps-docker-compose/group_vars/all.yml

@@ -0,0 +1,7 @@
+# http://docs.ansible.com/ansible/intro_windows.html#windows-how-does-it-work
+
+ansible_port: 55986 # not 5986, as we would use for non-virtualized environments
+ansible_connection: winrm
+
+# The following is necessary for Python 2.7.9+ when using default WinRM self-signed certificates:
+ansible_winrm_server_cert_validation: ignore

step4-multiple-spring-boot-apps-docker-compose/group_vars/ansible-windows-docker-springboot-dev.yml

@@ -0,0 +1,4 @@
+# http://docs.ansible.com/ansible/intro_windows.html#windows-how-does-it-work
+
+ansible_user: vagrant
+ansible_password: vagrant

step4-multiple-spring-boot-apps-docker-compose/group_vars/ansible-windows-docker-springboot-qa.yml

@@ -0,0 +1,4 @@
+# http://docs.ansible.com/ansible/intro_windows.html#windows-how-does-it-work
+
+ansible_user: vagrant
+ansible_password: vagrant

step4-multiple-spring-boot-apps-docker-compose/hostsfile

@@ -0,0 +1,5 @@
+[ansible-windows-docker-springboot-dev]
+127.0.0.1
+
+[ansible-windows-docker-springboot-qa]
+127.0.0.1

step4-multiple-spring-boot-apps-docker-compose/spring-boot-app-health-check.yml

@@ -0,0 +1,39 @@
+---
+  - name: Obtain the Docker Container´s internal IP address (because localhost doesn´t work for now https://github.com/docker/for-win/issues/458)
+    win_shell: "docker inspect -f {% raw %}'{{ .NetworkSettings.Networks.nat.IPAddress }}' {% endraw %} {{spring_boot_app.name}} {{ '>' }} container_ip.txt"
+
+  - name: Get the Docker Container´s internal IP address from the temporary txt-file (we have to do this because of templating problems, see http://stackoverflow.com/a/32279729/4964553)
+    win_shell: cat container_ip.txt
+    register: win_shell_txt_return
+
+  - name: Define the IP as variable
+    set_fact:
+      docker_container_ip: "{{ win_shell_txt_return.stdout.splitlines()[0] }}"
+
+  - debug:
+      msg: "Your Docker Container has the internal IP {{ docker_container_ip }} --> Let´s do a health-check against this URI: 'http://{{ docker_container_ip }}:{{spring_boot_app.port}}/health'"
+
+  ###### Smoke test, if app has booted up correctly
+  - name: Wait until our Spring Boot app is up & running
+    win_uri:
+      url: "http://{{ docker_container_ip }}:{{spring_boot_app.port}}/health"
+      method: GET
+    register: health_result
+    until: health_result.status_code == 200  
+    retries: 10
+    delay: 5
+    ignore_errors: yes
+
+  - name: Show some more info, only when health check went wrong
+    win_uri:
+      url: "http://{{ docker_container_ip }}:{{spring_boot_app.port}}/health"
+      method: GET
+    register: health_bad_result
+    ignore_errors: yes
+    when: health_result|failed
+
+  - name: Show some more info, only when health check went wrong
+    debug:
+      msg: "The app reacted with: {{health_bad_result}}"
+    when: health_result|failed
+

step4-multiple-spring-boot-apps-docker-compose/spring-boot-app-prepare.yml

@@ -0,0 +1,24 @@
+---
+  - name: Defining needed variables
+    set_fact:
+      spring_boot_app:
+        name: "{{ item.name }}"
+        port: "{{ item.port }}"
+        jar: "{{ item.path_to_jar }}"
+
+  - name: Preparing the following Spring Boot App´s Files for docker-compose run
+    debug:
+      msg: "Processing '{{spring_boot_app.name}}' with port '{{ spring_boot_app.port }}'"
+
+  - name: Create directory C:\spring-boot\spring_boot_app.name, if not there
+    win_file: path={{base_path}}\\{{spring_boot_app.name}} state=directory
+
+  - name: Template and copy Spring Boot app´s Dockerfile to directory C:\spring-boot\spring_boot_app.name
+    win_template:
+      src: "templates/Dockerfile-SpringBoot-App.j2"
+      dest: "{{base_path}}\\{{spring_boot_app.name}}\\Dockerfile"
+
+  - name: Copy Spring Boot app´s jar-File to directory C:\spring-boot\spring_boot_app.name
+    win_copy:
+      src: "{{spring_boot_app.jar}}"
+      dest: "{{base_path}}\\{{spring_boot_app.name}}\\{{spring_boot_app.name}}.jar"

step4-multiple-spring-boot-apps-docker-compose/spring-boot-app-windows-docker.yml

@@ -0,0 +1,44 @@
+---
+  - name: Preparing to run Spring Boot App in Docker Windows Container
+    debug:
+      msg: "Processing '{{spring_boot_app.name}}'"
+
+  - name: Define some needed variables
+    set_fact:
+      spring_boot_app_path: "{{base_path}}\\{{spring_boot_app.name}}"
+
+  - name: Create directory C:\spring-boot\spring_boot_app.name, if not there
+    win_file: path={{spring_boot_app_path}} state=directory
+
+  - name: Template and copy Spring Boot app´s Dockerfile to directory C:\spring-boot\spring_boot_app.name
+    win_template:
+      src: "templates/Dockerfile-SpringBoot-App.j2"
+      dest: "{{spring_boot_app_path}}\\Dockerfile"
+
+  - name: Copy Spring Boot app´s jar-File to directory C:\spring-boot\spring_boot_app.name
+    win_copy:
+      src: "{{jar_input_path}}"
+      dest: "{{spring_boot_app_path}}\\{{spring_boot_app.name}}.jar"
+
+  - name: Stop the Service Docker container
+    win_shell: docker stop {{spring_boot_app.name}}
+    ignore_errors: yes
+
+  - name: Remove the Service Docker container
+    win_shell: docker rm {{spring_boot_app.name}} --force
+    ignore_errors: yes
+
+  - name: Remove the Service Docker image
+    win_shell: docker rmi {{spring_boot_app.name}}:latest --force
+    ignore_errors: yes
+
+  - name: Build the Service Docker image
+    win_shell: docker build . --tag {{spring_boot_app.name}}:latest
+    args:
+      chdir: "{{spring_boot_app_path}}"
+
+  - name: Run the Service Docker container
+    win_shell: "docker run -d --publish {{spring_boot_app.port}}:{{spring_boot_app.port}} --name={{spring_boot_app.name}} --restart=unless-stopped {{spring_boot_app.name}}:latest"
+
+  - name: Healthchecking the Spring Boot app
+    include: spring-boot-app-health-check.yml

step4-multiple-spring-boot-apps-docker-compose/templates/Dockerfile-SpringBoot-App.j2

@@ -0,0 +1,17 @@
+#jinja2: newline_sequence:'\r\n'
+FROM springboot-oraclejre-nanoserver:latest
+
+MAINTAINER Jonas Hecht
+
+ENV REGISTRY_HOST {{service_registry_name}}
+ENV SPRINGBOOT_APP_NAME {{spring_boot_app.name}}
+
+# Expose the apps Port
+EXPOSE {{spring_boot_app.port}}
+
+# Add Spring Boot app.jar to Container
+ADD {{spring_boot_app.name}}.jar app.jar
+
+# Fire up our Spring Boot app by default
+CMD ["java.exe", "-jar app.jar --server.port={{spring_boot_app.port}}"]
+

step4-multiple-spring-boot-apps-docker-compose/templates/docker-compose.j2

@@ -0,0 +1,35 @@
+#jinja2: newline_sequence:'\r\n'
+version: '3.1'
+
+services:
+
+ eureka-serviceregistry:
+  build: ./eureka-serviceregistry
+  ports:
+   - "8761:8761"
+  tty:
+    true
+
+ # no portbinding here - the actual services should be accessible through Zuul proxy
+ weatherbackend:
+  build: ./weatherbackend
+  tty:
+    true
+
+ # no portbinding here - the actual services should be accessible through Zuul proxy
+ weatherbackend-second:
+  build: ./weatherbackend-second
+  tty:
+    true
+
+ zuul-edgeservice:
+  build: ./zuul-edgeservice
+  ports:
+   - "8080:8080"
+  tty:
+    true
+
+networks:
+ default:
+  external:
+   name: "nat"